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97a5253d |
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16-Feb-2024 |
Masahiro Yamada <masahiroy@kernel.org> |
powerpc: remove unused KCSAN_SANITIZE_early_64.o in Makefile Commit 2fb857bc9f9e ("powerpc/kcsan: Add exclusions from instrumentation") added KCSAN_SANITIZE_early_64.o to arch/powerpc/kernel/Makefile, while it does not compile early_64.o. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240216135817.2003106-1-masahiroy@kernel.org
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27be2456 |
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06-Jun-2023 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc/64: Rename entry_64.S to prom_entry_64.S This file contains only the enter_prom implementation now. Trim includes and update header comment while we're here. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230606132447.315714-7-npiggin@gmail.com
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afc63868 |
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06-Jun-2023 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc: merge 32-bit and 64-bit _switch implementation The _switch stack frame setup are substantially the same, so are the comments. The difference in how the stack and current are switched, and other hardware and software housekeeping is done is moved into macros. Generated code should be unchanged. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Tweak include orer to fix compile errors on some configs] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230606132447.315714-6-npiggin@gmail.com
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2fb857bc |
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05-Feb-2023 |
Rohan McLure <rmclure@linux.ibm.com> |
powerpc/kcsan: Add exclusions from instrumentation Exclude various incompatible compilation units from KCSAN instrumentation. Signed-off-by: Rohan McLure <rmclure@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20230206021801.105268-2-rmclure@linux.ibm.com
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e2375062 |
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11-Oct-2022 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc/32: fix syscall wrappers with 64-bit arguments of unaligned register-pairs powerpc 32-bit system call (and function) calling convention for 64-bit arguments requires the next available odd-pair (two sequential registers with the first being odd-numbered) from the standard register argument allocation. The first argument register is r3, so a 64-bit argument that appears at an even position in the argument list must skip a register (unless there were preceding 64-bit arguments, which might throw things off). This requires non-standard compat definitions to deal with the holes in the argument register allocation. With pt_regs syscall wrappers which use a standard mapper to map pt_regs GPRs to function arguments, 32-bit kernels hit the same basic problem, the standard definitions don't cope with the unused argument registers. Fix this by having 32-bit kernels share those syscall definitions with compat. Thanks to Jason for spending a lot of time finding and bisecting this and developing a trivial reproducer. The perfect bug report. Reported-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Fixes: 7e92e01b72452 ("powerpc: Provide syscall wrapper") Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20221012035335.866440-1-npiggin@gmail.com
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ae5b6779 |
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10-Oct-2022 |
Joel Stanley <joel@jms.id.au> |
powerpc: Fix 85xx build The merge of the kbuild tree dropped the renaming of the FSL_BOOKE kconfig option. Fixes: 8afc66e8d43b ("Merge tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild") Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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32164845 |
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24-Sep-2022 |
Masahiro Yamada <masahiroy@kernel.org> |
kbuild: use obj-y instead extra-y for objects placed at the head The objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a. This commit gets rid of the latter. Create vmlinux.a to collect all the objects that are unconditionally linked to vmlinux. The objects listed in head-y are moved to the head of vmlinux.a by using 'ar m'. With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y for builtin objects. There is no *.o that is directly linked to vmlinux. Drop unneeded code in scripts/clang-tools/gen_compile_commands.py. $(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggested by Nathan Chancellor [1]. [1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/ Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
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6556fd1a |
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19-Sep-2022 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc: Cleanup idle for e500 e500 idle setup is a bit messy. e500_idle() is used for PPC32 while book3e_idle() is used for PPC64. As they are mutually exclusive, call them all e500_idle(). Use CONFIG_MPC_85xx instead of PPC32 + E500 in Makefile and rename idle_e500.c to idle_85xx.c . Rename idle_book3e.c to idle_64e.c and remove #ifdef PPC64 in as it's only built on PPC64. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8039301334e948974c85ec5ef2db37751075185b.1663606876.git.christophe.leroy@csgroup.eu
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3e731858 |
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19-Sep-2022 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc: Remove CONFIG_PPC_FSL_BOOK3E CONFIG_PPC_FSL_BOOK3E is redundant with CONFIG_PPC_E500. Remove it. And rename five files accordingly. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Rename include guards to match new file names] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/795cb93b88c9a0279289712e674f39e3b108a1b4.1663606876.git.christophe.leroy@csgroup.eu
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688de017 |
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19-Sep-2022 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc: Change CONFIG_E500 to CONFIG_PPC_E500 It will be used outside arch/powerpc, make it clear its a powerpc configuration item. And we already have CONFIG_PPC_E500MC, so that will make it more consistent. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/e63b22083c11c4300f4a82d3123a46e5fdd54fa6.1663606876.git.christophe.leroy@csgroup.eu
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dfc3095c |
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19-Sep-2022 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc: Remove CONFIG_FSL_BOOKE PPC_85xx is PPC32 only. PPC_85xx always selects E500 and is the only PPC32 that selects E500. FSL_BOOKE is selected when E500 and PPC32 are selected. So FSL_BOOKE is redundant with PPC_85xx. Remove FSL_BOOKE. And rename four files accordingly. cpu_setup_fsl_booke.S is not renamed because it is linked to PPC_FSL_BOOK3E and not to FSL_BOOKE as suggested by its name. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/08e3e15594e66d63b9e89c5b4f9c35153913c28f.1663606875.git.christophe.leroy@csgroup.eu
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f4a0318f |
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01-Jul-2022 |
Xiu Jianfeng <xiujianfeng@huawei.com> |
powerpc: add support for syscall stack randomization Add support for adding a random offset to the stack while handling syscalls. This patch uses mftb() instead of get_random_int() for better performance. In order to avoid unconditional stack canaries on syscall entry (due to the use of alloca()), also disable stack protector to avoid triggering needless checks and slowing down the entry path. As there is no general way to control stack protector coverage with a function attribute, this must be disabled at the compilation unit level. Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220701082435.126596-3-xiujianfeng@huawei.com
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1547db7d |
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01-Jul-2022 |
Xiu Jianfeng <xiujianfeng@huawei.com> |
powerpc: Move system_call_exception() to syscall.c This is a lead-up patch to enable syscall stack randomization, which uses alloca() and makes the compiler add unconditional stack canaries on syscall entry. In order to avoid triggering needless checks and slowing down the entry path, the feature needs to disable stack protector at the compilation unit level as there is no general way to control stack protector coverage with a function attribute. So move system_call_exception() to syscall.c to avoid affecting other functions in interrupt.c. Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220701082435.126596-2-xiujianfeng@huawei.com
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7d7b28b3 |
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18-May-2022 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/irq: Split irq.c More than half of irq.c is dedicated to PPC64. Move PPC64 code out of irq.c into irq_64.c Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/9f1a47de80f78d3dd270a7a72f69f55f581c4054.1652859593.git.christophe.leroy@csgroup.eu
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be640317 |
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18-Jul-2022 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc/64s: Disable stack variable initialisation for prom_init With GCC 12 allmodconfig prom_init fails to build: Error: External symbol 'memset' referenced from prom_init.c make[2]: *** [arch/powerpc/kernel/Makefile:204: arch/powerpc/kernel/prom_init_check] Error 1 The allmodconfig build enables KASAN, so all calls to memset in prom_init should be converted to __memset by the #ifdefs in asm/string.h, because prom_init must use the non-KASAN instrumented versions. The build failure happens because there's a call to memset that hasn't been caught by the pre-processor and converted to __memset. Typically that's because it's a memset generated by the compiler itself, and that is the case here. With GCC 12, allmodconfig enables CONFIG_INIT_STACK_ALL_PATTERN, which causes the compiler to emit memset calls to initialise on-stack variables with a pattern. Because prom_init is non-user-facing boot-time only code, as a workaround just disable stack variable initialisation to unbreak the build. Reported-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220718134418.354114-1-mpe@ellerman.id.au
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743cdb7b |
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19-May-2022 |
Paul Mackerras <paulus@ozlabs.org> |
powerpc/kasan: Mark more real-mode code as not to be instrumented This marks more files and functions that can possibly be called in real mode as not to be instrumented by KASAN. Most were found by inspection, except for get_pseries_errorlog() which was reported as causing a crash in testing. Reported-by: Nageswara R Sastry <rnsastry@linux.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/YoX1kZPnmUX4RZEK@cleo
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41b7a347 |
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18-May-2022 |
Daniel Axtens <dja@axtens.net> |
powerpc: Book3S 64-bit outline-only KASAN support Implement a limited form of KASAN for Book3S 64-bit machines running under the Radix MMU, supporting only outline mode. - Enable the compiler instrumentation to check addresses and maintain the shadow region. (This is the guts of KASAN which we can easily reuse.) - Require kasan-vmalloc support to handle modules and anything else in vmalloc space. - KASAN needs to be able to validate all pointer accesses, but we can't instrument all kernel addresses - only linear map and vmalloc. On boot, set up a single page of read-only shadow that marks all iomap and vmemmap accesses as valid. - Document KASAN in powerpc docs. Background ---------- KASAN support on Book3S is a bit tricky to get right: - It would be good to support inline instrumentation so as to be able to catch stack issues that cannot be caught with outline mode. - Inline instrumentation requires a fixed offset. - Book3S runs code with translations off ("real mode") during boot, including a lot of generic device-tree parsing code which is used to determine MMU features. [ppc64 mm note: The kernel installs a linear mapping at effective address c000...-c008.... This is a one-to-one mapping with physical memory from 0000... onward. Because of how memory accesses work on powerpc 64-bit Book3S, a kernel pointer in the linear map accesses the same memory both with translations on (accessing as an 'effective address'), and with translations off (accessing as a 'real address'). This works in both guests and the hypervisor. For more details, see s5.7 of Book III of version 3 of the ISA, in particular the Storage Control Overview, s5.7.3, and s5.7.5 - noting that this KASAN implementation currently only supports Radix.] - Some code - most notably a lot of KVM code - also runs with translations off after boot. - Therefore any offset has to point to memory that is valid with translations on or off. One approach is just to give up on inline instrumentation. This way boot-time checks can be delayed until after the MMU is set is up, and we can just not instrument any code that runs with translations off after booting. Take this approach for now and require outline instrumentation. Previous attempts allowed inline instrumentation. However, they came with some unfortunate restrictions: only physically contiguous memory could be used and it had to be specified at compile time. Maybe we can do better in the future. [paulus@ozlabs.org - Rebased onto 5.17. Note that a kernel with CONFIG_KASAN=y will crash during boot on a machine using HPT translation because not all the entry points to the generic KASAN code are protected with a call to kasan_arch_is_ready().] Originally-by: Balbir Singh <bsingharora@gmail.com> # ppc64 out-of-line radix version Signed-off-by: Daniel Axtens <dja@axtens.net> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> [mpe: Update copyright year and comment formatting] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/YoTE69OQwiG7z+Gu@cleo
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838ee286 |
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08-Mar-2022 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc/rtas: Move rtas entry assembly into its own file This makes working on the code a bit easier. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220308135047.478297-2-npiggin@gmail.com
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fd1feade |
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21-Jan-2022 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/vdso: Merge vdso64 and vdso32 into a single directory merge vdso64 into vdso32 and rename it vdso. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/4dbe05cc130f6a0858d09ac72e436c373cb08b70.1642782130.git.christophe.leroy@csgroup.eu
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35df0155 |
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21-Mar-2022 |
Alexei Starovoitov <ast@kernel.org> |
Revert "powerpc: Add rethook support" This reverts commit 02752bd99dc2daae05c12f7063bf0632e22b4c1c. Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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02752bd9 |
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15-Mar-2022 |
Masami Hiramatsu <mhiramat@kernel.org> |
powerpc: Add rethook support Add rethook powerpc64 implementation. Most of the code has been copied from kretprobes on powerpc64. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Tested-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/164735288495.1084943.539630613772422267.stgit@devnote2
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bba49665 |
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22-Dec-2021 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/32: Fix boot failure with GCC latent entropy plugin Boot fails with GCC latent entropy plugin enabled. This is due to early boot functions trying to access 'latent_entropy' global data while the kernel is not relocated at its final destination yet. As there is no way to tell GCC to use PTRRELOC() to access it, disable latent entropy plugin in early_32.o and feature-fixups.o and code-patching.o Fixes: 38addce8b600 ("gcc-plugins: Add latent_entropy plugin") Cc: stable@vger.kernel.org # v4.9+ Reported-by: Erhard Furtner <erhard_f@mailbox.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://bugzilla.kernel.org/show_bug.cgi?id=215217 Link: https://lore.kernel.org/r/2bac55483b8daf5b1caa163a45fa5f9cdbe18be4.1640178426.git.christophe.leroy@csgroup.eu
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1614b2b1 |
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29-Nov-2021 |
Peter Zijlstra <peterz@infradead.org> |
arch: Make ARCH_STACKWALK independent of STACKTRACE Make arch_stack_walk() available for ARCH_STACKWALK architectures without it being entangled in STACKTRACE. Link: https://lore.kernel.org/lkml/20211022152104.356586621@infradead.org/ Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> [Mark: rebase, drop unnecessary arm change] Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Link: https://lore.kernel.org/r/20211129142849.3056714-2-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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964c33cd |
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09-Nov-2021 |
Masahiro Yamada <masahiroy@kernel.org> |
powerpc: clean vdso32 and vdso64 directories Since commit bce74491c300 ("powerpc/vdso: fix unnecessary rebuilds of vgettimeofday.o"), "make ARCH=powerpc clean" does not clean up the arch/powerpc/kernel/{vdso32,vdso64} directories. Use the subdir- trick to let "make clean" descend into them. Fixes: bce74491c300 ("powerpc/vdso: fix unnecessary rebuilds of vgettimeofday.o") Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211109185015.615517-1-masahiroy@kernel.org
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b7472e17 |
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27-Oct-2021 |
Michael Ellerman <mpe@ellerman.id.au> |
Revert "powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC" This reverts commit 566af8cda399c088763d07464463dc871c943b54. This caused some conflicts vs the audit tree, and the audit maintainers would prefer we postpone this to the next merge window so we have more time for testing. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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5c810ced |
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01-Sep-2021 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/32: Add support for out-of-line static calls Add support for out-of-line static calls on PPC32. This change improve performance of calls to global function pointers by using direct calls instead of indirect calls. The trampoline is initialy populated with a 'blr' or branch to target, followed by an unreachable long jump sequence. In order to cater with parallele execution, the trampoline needs to be updated in a way that ensures it remains consistent at all time. This means we can't use the traditional lis/addi to load r12 with the target address, otherwise there would be a window during which the first instruction contains the upper part of the new target address while the second instruction still contains the lower part of the old target address. To avoid that the target address is stored just after the 'bctr' and loaded from there with a single instruction. Then, depending on the target distance, arch_static_call_transform() will either replace the first instruction by a direct 'bl <target>' or 'nop' in order to have the trampoline fall through the long jump sequence. For the special case of __static_call_return0(), to avoid the risk of a far branch, a version of it is inlined at the end of the trampoline. Performancewise the long jump sequence is probably not better than the indirect calls set by GCC when we don't use static calls, but such calls are unlikely to be required on powerpc32: With most configurations the kernel size is far below 32 Mbytes so only modules may happen to be too far. And even modules are likely to be close enough as they are allocated below the kernel core and as close as possible of the kernel text. static_call selftest is running successfully with this change. With this patch, __do_irq() has the following sequence to trace irq entries: c0004a00 <__SCT__tp_func_irq_entry>: c0004a00: 48 00 00 e0 b c0004ae0 <__traceiter_irq_entry> c0004a04: 3d 80 c0 00 lis r12,-16384 c0004a08: 81 8c 4a 1c lwz r12,18972(r12) c0004a0c: 7d 89 03 a6 mtctr r12 c0004a10: 4e 80 04 20 bctr c0004a14: 38 60 00 00 li r3,0 c0004a18: 4e 80 00 20 blr c0004a1c: 00 00 00 00 .long 0x0 ... c0005654 <__do_irq>: ... c0005664: 7c 7f 1b 78 mr r31,r3 ... c00056a0: 81 22 00 00 lwz r9,0(r2) c00056a4: 39 29 00 01 addi r9,r9,1 c00056a8: 91 22 00 00 stw r9,0(r2) c00056ac: 3d 20 c0 af lis r9,-16209 c00056b0: 81 29 74 cc lwz r9,29900(r9) c00056b4: 2c 09 00 00 cmpwi r9,0 c00056b8: 41 82 00 10 beq c00056c8 <__do_irq+0x74> c00056bc: 80 69 00 04 lwz r3,4(r9) c00056c0: 7f e4 fb 78 mr r4,r31 c00056c4: 4b ff f3 3d bl c0004a00 <__SCT__tp_func_irq_entry> Before this patch, __do_irq() was doing the following to trace irq entries: c0005700 <__do_irq>: ... c0005710: 7c 7e 1b 78 mr r30,r3 ... c000574c: 93 e1 00 0c stw r31,12(r1) c0005750: 81 22 00 00 lwz r9,0(r2) c0005754: 39 29 00 01 addi r9,r9,1 c0005758: 91 22 00 00 stw r9,0(r2) c000575c: 3d 20 c0 af lis r9,-16209 c0005760: 83 e9 f4 cc lwz r31,-2868(r9) c0005764: 2c 1f 00 00 cmpwi r31,0 c0005768: 41 82 00 24 beq c000578c <__do_irq+0x8c> c000576c: 81 3f 00 00 lwz r9,0(r31) c0005770: 80 7f 00 04 lwz r3,4(r31) c0005774: 7d 29 03 a6 mtctr r9 c0005778: 7f c4 f3 78 mr r4,r30 c000577c: 4e 80 04 21 bctrl c0005780: 85 3f 00 0c lwzu r9,12(r31) c0005784: 2c 09 00 00 cmpwi r9,0 c0005788: 40 82 ff e4 bne c000576c <__do_irq+0x6c> Behind the fact of now using a direct 'bl' instead of a 'load/mtctr/bctr' sequence, we can also see that we get one less register on the stack. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/6ec2a7865ed6a5ec54ab46d026785bafe1d837ea.1630484892.git.christophe.leroy@csgroup.eu
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566af8cd |
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24-Aug-2021 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC Commit e65e1fc2d24b ("[PATCH] syscall class hookup for all normal targets") added generic support for AUDIT but that didn't include support for bi-arch like powerpc. Commit 4b58841149dc ("audit: Add generic compat syscall support") added generic support for bi-arch. Convert powerpc to that bi-arch generic audit support. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/a4b3951d1191d4183d92a07a6097566bde60d00a.1629812058.git.christophe.leroy@csgroup.eu
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dbf77fed |
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12-Aug-2021 |
Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> |
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir No functional change in this patch. arch_debugfs_dir is the generic kernel name declared in linux/debugfs.h for arch-specific debugfs directory. Architectures like x86/s390 already use the name. Rename powerpc specific powerpc_debugfs_root to arch_debugfs_dir. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210812132831.233794-2-aneesh.kumar@linux.ibm.com
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791f9e36 |
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31-Mar-2021 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/vdso: Make sure vdso_wrapper.o is rebuilt everytime vdso.so is rebuilt Commit bce74491c300 ("powerpc/vdso: fix unnecessary rebuilds of vgettimeofday.o") moved vdso32_wrapper.o and vdso64_wrapper.o out of arch/powerpc/kernel/vdso[32/64]/ and removed the dependencies in the Makefile. This leads to the wrappers not being re-build hence the kernel embedding the old vdso library. Add back missing dependencies to ensure vdso32_wrapper.o and vdso64_wrapper.o are rebuilt when vdso32.so.dbg and vdso64.so.dbg are changed. Fixes: bce74491c300 ("powerpc/vdso: fix unnecessary rebuilds of vgettimeofday.o") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8bb015bc98c51d8ced581415b7e3d157e18da7c9.1617181918.git.christophe.leroy@csgroup.eu
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344bb20b |
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08-Feb-2021 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/syscall: Make interrupt.c buildable on PPC32 To allow building interrupt.c on PPC32, ifdef out specific PPC64 code or use helpers which are available on both PP32 and PPC64 Modify Makefile to always build interrupt.o Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/ba073ad67bd971a88ce331b65d6655523b54c794.1612796617.git.christophe.leroy@csgroup.eu
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ab1a517d |
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08-Feb-2021 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/syscall: Rename syscall_64.c into interrupt.c syscall_64.c will be reused almost as is for PPC32. As this file also contains functions to handle other types of interrupts rename it interrupt.c Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/cddc2deaa8f049d3ec419738e69804934919b935.1612796617.git.christophe.leroy@csgroup.eu
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bce74491 |
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23-Dec-2020 |
Masahiro Yamada <masahiroy@kernel.org> |
powerpc/vdso: fix unnecessary rebuilds of vgettimeofday.o vgettimeofday.o is unnecessarily rebuilt. Adding it to 'targets' is not enough to fix the issue. Kbuild is correctly rebuilding it because the command line is changed. PowerPC builds each vdso directory twice; first in vdso_prepare to generate vdso{32,64}-offsets.h, second as part of the ordinary build process to embed vdso{32,64}.so.dbg into the kernel. The problem shows up when CONFIG_PPC_WERROR=y due to the following line in arch/powerpc/Kbuild: subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror In the preparation stage, Kbuild directly visits the vdso directories, hence it does not inherit subdir-ccflags-y. In the second descend, Kbuild adds -Werror, which results in the command line flipping with/without -Werror. It implies a potential danger; if a more critical flag that would impact the resulted vdso, the offsets recorded in the headers might be different from real offsets in the embedded vdso images. Removing the unneeded second descend solves the problem. Reported-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/linuxppc-dev/87tuslxhry.fsf@mpe.ellerman.id.au/ Link: https://lore.kernel.org/r/20201223171142.707053-1-masahiroy@kernel.org
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a7223f5b |
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28-Oct-2020 |
Ard Biesheuvel <ardb@kernel.org> |
powerpc: Avoid broken GCC __attribute__((optimize)) Commit 7053f80d9696 ("powerpc/64: Prevent stack protection in early boot") introduced a couple of uses of __attribute__((optimize)) with function scope, to disable the stack protector in some early boot code. Unfortunately, and this is documented in the GCC man pages [0], overriding function attributes for optimization is broken, and is only supported for debug scenarios, not for production: the problem appears to be that setting GCC -f flags using this method will cause it to forget about some or all other optimization settings that have been applied. So the only safe way to disable the stack protector is to disable it for the entire source file. [0] https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html Fixes: 7053f80d9696 ("powerpc/64: Prevent stack protection in early boot") Signed-off-by: Ard Biesheuvel <ardb@kernel.org> [mpe: Drop one remaining use of __nostackprotector, reported by snowpatch] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20201028080433.26799-1-ardb@kernel.org
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533090e5 |
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06-Oct-2020 |
Christophe Leroy <christophe.leroy@csgroup.eu> |
powerpc/32s: Rename head_32.S to head_book3s_32.S Unlike PPC64 which had a single head_64.S, PPC32 are multiple ones. There is the head_32.S, selected by default based on the value of BITS and overridden based on some CONFIG_ values. This leads to thinking that it may be selected by different types of PPC32 platform but indeed it ends up being selected by book3s/32 only. Make that explicit by: - Not doing any default selection based on BITS. - Renaming head_32.S to head_book3s_32.S. - Get head_book3s_32.S selected only by CONFIG_PPC_BOOK3S_32. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Fix head_$(BITS).o reference in arch/powerpc/Makefile] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/319d379f696412681c66a987cc75e6abf8f958d2.1601975100.git.christophe.leroy@csgroup.eu
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edc8dd99 |
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01-Sep-2020 |
Ravi Bangoria <ravi.bangoria@linux.ibm.com> |
powerpc/watchpoint: Move DAWR detection logic outside of hw_breakpoint.c Power10 hw has multiple DAWRs but hw doesn't tell which DAWR caused the exception. So we have a sw logic to detect that in hw_breakpoint.c. But hw_breakpoint.c gets compiled only with CONFIG_HAVE_HW_BREAKPOINT=Y. Move DAWR detection logic outside of hw_breakpoint.c so that it can be reused when CONFIG_HAVE_HW_BREAKPOINT is not set. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200902042945.129369-5-ravi.bangoria@linux.ibm.com
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107c5500 |
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25-Jul-2020 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc/pseries: Add KVM guest doorbell restrictions KVM guests have certain restrictions and performance quirks when using doorbells. This patch moves the EPAPR KVM guest test so it can be shared with PSERIES, and uses that in doorbell setup code to apply the KVM guest quirks and improves IPI performance for two cases: - PowerVM guests may now use doorbells even if they are secure. - KVM guests no longer use doorbells if XIVE is available. There is a valid complaint that "KVM guest" is not a very reasonable thing to test for, it's preferable for the hypervisor to advertise particular behaviours to the guest so they could change if the hypervisor implementation or configuration changes. However in this case we were already assuming a KVM guest worst case, so this patch is about containing those quirks. If KVM later advertises fast doorbells, we should test for that and override the quirks. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200726035155.1424103-4-npiggin@gmail.com
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d74ee8e9 |
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25-Jul-2020 |
Oliver O'Halloran <oohall@gmail.com> |
powerpc/eeh: Remove eeh_dev.c The only thing in this file is eeh_dev_init() which is allocates and initialises an eeh_dev based on a pci_dn. This is only ever called from pci_dn.c so move it into there and remove the file. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200725081231.39076-2-oohall@gmail.com
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893ab004 |
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26-Jun-2020 |
Masahiro Yamada <masahiroy@kernel.org> |
kbuild: remove cc-option test of -fno-stack-protector Some Makefiles already pass -fno-stack-protector unconditionally. For example, arch/arm64/kernel/vdso/Makefile, arch/x86/xen/Makefile. No problem report so far about hard-coding this option. So, we can assume all supported compilers know -fno-stack-protector. GCC 4.8 and Clang support this option (https://godbolt.org/z/_HDGzN) Get rid of cc-option from -fno-stack-protector. Remove CONFIG_CC_HAS_STACKPROTECTOR_NONE, which is always 'y'. Note: arch/mips/vdso/Makefile adds -fno-stack-protector twice, first unconditionally, and second conditionally. I removed the second one. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
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2f26ed17 |
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29-May-2020 |
Daniel Axtens <dja@axtens.net> |
powerpc/64s: Disable sanitisers for C syscall/interrupt entry/exit code syzkaller is picking up a bunch of crashes that look like this: Unrecoverable exception 380 at c00000000037ed60 (msr=8000000000001031) Oops: Unrecoverable exception, sig: 6 [#1] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries Modules linked in: CPU: 0 PID: 874 Comm: syz-executor.0 Not tainted 5.7.0-rc7-syzkaller-00016-gb0c3ba31be3e #0 NIP: c00000000037ed60 LR: c00000000004bac8 CTR: c000000000030990 REGS: c0000000555a7230 TRAP: 0380 Not tainted (5.7.0-rc7-syzkaller-00016-gb0c3ba31be3e) MSR: 8000000000001031 <SF,ME,IR,DR,LE> CR: 48222882 XER: 20000000 CFAR: c00000000004bac4 IRQMASK: 0 GPR00: c00000000004bb68 c0000000555a74c0 c0000000024b3500 0000000000000005 GPR04: 0000000000000000 0000000000000000 c00000000004bb88 c008000000910000 GPR08: 00000000000b0000 c00000000004bac8 0000000000016000 c000000002503500 GPR12: c000000000030990 c000000003190000 00000000106a5898 00000000106a0000 GPR16: 00000000106a5890 c000000007a92000 c000000008180e00 c000000007a8f700 GPR20: c000000007a904b0 0000000010110000 c00000000259d318 5deadbeef0000100 GPR24: 5deadbeef0000122 c000000078422700 c000000009ee88b8 c000000078422778 GPR28: 0000000000000001 800000000280b033 0000000000000000 c0000000555a75a0 NIP [c00000000037ed60] __sanitizer_cov_trace_pc+0x40/0x50 LR [c00000000004bac8] interrupt_exit_kernel_prepare+0x118/0x310 Call Trace: [c0000000555a74c0] [c00000000004bb68] interrupt_exit_kernel_prepare+0x1b8/0x310 (unreliable) [c0000000555a7530] [c00000000000f9a8] interrupt_return+0x118/0x1c0 --- interrupt: 900 at __sanitizer_cov_trace_pc+0x0/0x50 ...<random previous call chain>... This is caused by __sanitizer_cov_trace_pc() causing an SLB fault after MSR[RI] has been cleared by __hard_EE_RI_disable(), which we can not recover from. Do not instrument the new syscall/interrupt entry/exit code with KCOV, GCOV or UBSAN. Reported-by: syzbot-ppc64 <ozlabsyz@au1.ibm.com> Fixes: 68b34588e202 ("powerpc/64/sycall: Implement syscall entry/exit logic in C") Signed-off-by: Daniel Axtens <dja@axtens.net> Acked-by: Andrew Donnellan <ajd@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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0a7601b6 |
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20-Mar-2020 |
Michal Suchanek <msuchanek@suse.de> |
powerpc/64: make buildable without CONFIG_COMPAT There are numerous references to 32bit functions in generic and 64bit code so ifdef them out. Signed-off-by: Michal Suchanek <msuchanek@suse.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/e5619617020ef3a1f54f0c076e7d74cb9ec9f3bf.1584699455.git.msuchanek@suse.de
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da9a1c10 |
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27-Feb-2020 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc: Move ptrace into a subdirectory. In order to allow splitting of ptrace depending on the different CONFIG_ options, create a subdirectory dedicated to ptrace and move ptrace.c and ptrace32.c into it. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/9ebcbe37834e9d447dd97f4381084795a673260c.1582848567.git.christophe.leroy@c-s.fr
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68b34588 |
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25-Feb-2020 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc/64/sycall: Implement syscall entry/exit logic in C System call entry and particularly exit code is beyond the limit of what is reasonable to implement in asm. This conversion moves all conditional branches out of the asm code, except for the case that all GPRs should be restored at exit. Null syscall test is about 5% faster after this patch, because the exit work is handled under local_irq_disable, and the hard mask and pending interrupt replay is handled after that, which avoids games with MSR. mpe: Includes subsequent fixes from Nick: This fixes 4 issues caught by TM selftests. First was a tm-syscall bug that hit due to tabort_syscall being called after interrupts were reconciled (in a subsequent patch), which led to interrupts being enabled before tabort_syscall was called. Rather than going through an un-reconciling interrupts for the return, I just go back to putting the test early in asm, the C-ification of that wasn't a big win anyway. Second is the syscall return _TIF_USER_WORK_MASK check would go into an infinite loop if _TIF_RESTORE_TM became set. The asm code uses _TIF_USER_WORK_MASK to brach to slowpath which includes restore_tm_state. Third is system call return was not calling restore_tm_state, I missed this completely (alhtough it's in the return from interrupt C conversion because when the asm syscall code encountered problems it would branch to the interrupt return code. Fourth is MSR_VEC missing from restore_math, which was caught by tm-unavailable selftest taking an unexpected facility unavailable interrupt when testing VSX unavailble exception with MSR.FP=1 MSR.VEC=1. Fourth case also has a fixup in a subsequent patch. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michal Suchanek <msuchanek@suse.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200225173541.1549955-26-npiggin@gmail.com
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ed0bc98f |
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10-Jul-2019 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc/64s: Reimplement power4_idle code in C This implements the tricky tracing and soft irq handling bits in C, leaving the low level bit to asm. A functional difference is that this redirects the interrupt exit to a return stub to execute blr, rather than the lr address itself. This is probably barely measurable on real hardware, but it keeps the link stack balanced. Tested with QEMU. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Move power4_fixup_nap back into exceptions-64s.S] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190711022404.18132-1-npiggin@gmail.com
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8dcd71b4 |
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18-Nov-2019 |
Nathan Chancellor <nathan@kernel.org> |
powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp LLVM revision r374662 gives LLVM the ability to convert certain loops into a reference to bcmp as an optimization; this breaks prom_init_check.sh: CALL arch/powerpc/kernel/prom_init_check.sh Error: External symbol 'bcmp' referenced from prom_init.c make[2]: *** [arch/powerpc/kernel/Makefile:196: prom_init_check] Error 1 bcmp is defined in lib/string.c as a wrapper for memcmp so this could be added to the whitelist. However, commit 450e7dd4001f ("powerpc/prom_init: don't use string functions from lib/") copied memcmp as prom_memcmp to avoid KASAN instrumentation so having bcmp be resolved to regular memcmp would break that assumption. Furthermore, because the compiler is the one that inserted bcmp, we cannot provide something like prom_bcmp. To prevent LLVM from being clever with optimizations like this, use -ffreestanding to tell LLVM we are not hosted so it is not free to make transformations like this. Reviewed-by: Nick Desaulneris <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191119045712.39633-4-natechancellor@gmail.com
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793b08e2 |
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28-Oct-2019 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc/kexec: Move kexec files into a dedicated subdir. arch/powerpc/kernel/ contains 8 files dedicated to kexec. Move them into a dedicated subdirectory. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> [mpe: Move to a/p/kexec, drop the 'machine' naming and use 'core' instead] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/afbef97ec6a978574a5cf91a4441000e0a9da42a.1572351221.git.christophe.leroy@c-s.fr
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9f7bd920 |
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28-Oct-2019 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc/32: Split kexec low level code out of misc_32.S Almost half of misc_32.S is dedicated to kexec. That's the relocation function for kexec. Drop it into a dedicated kexec_relocate_32.S Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/e235973a1198195763afd3b6baffa548a83f4611.1572351221.git.christophe.leroy@c-s.fr
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bd5d9c74 |
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10-Nov-2019 |
Nayna Jain <nayna@linux.ibm.com> |
powerpc: expose secure variables to userspace via sysfs PowerNV secure variables, which store the keys used for OS kernel verification, are managed by the firmware. These secure variables need to be accessed by the userspace for addition/deletion of the certificates. This patch adds the sysfs interface to expose secure variables for PowerNV secureboot. The users shall use this interface for manipulating the keys stored in the secure variables. Signed-off-by: Nayna Jain <nayna@linux.ibm.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Eric Richter <erichte@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1573441836-3632-3-git-send-email-nayna@linux.ibm.com
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9155e234 |
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10-Nov-2019 |
Nayna Jain <nayna@linux.ibm.com> |
powerpc/powernv: Add OPAL API interface to access secure variable The X.509 certificates trusted by the platform and required to secure boot the OS kernel are wrapped in secure variables, which are controlled by OPAL. This patch adds firmware/kernel interface to read and write OPAL secure variables based on the unique key. This support can be enabled using CONFIG_OPAL_SECVAR. Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com> Signed-off-by: Nayna Jain <nayna@linux.ibm.com> Signed-off-by: Eric Richter <erichte@linux.ibm.com> [mpe: Make secvar_ops __ro_after_init, only build opal-secvar.c if PPC_SECURE_BOOT=y] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1573441836-3632-2-git-send-email-nayna@linux.ibm.com
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4238fad3 |
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30-Oct-2019 |
Nayna Jain <nayna@linux.ibm.com> |
powerpc/ima: Add support to initialize ima policy rules PowerNV systems use a Linux-based bootloader, which rely on the IMA subsystem to enforce different secure boot modes. Since the verification policy may differ based on the secure boot mode of the system, the policies must be defined at runtime. This patch implements arch-specific support to define IMA policy rules based on the runtime secure boot mode of the system. This patch provides arch-specific IMA policies if PPC_SECURE_BOOT config is enabled. Signed-off-by: Nayna Jain <nayna@linux.ibm.com> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1572492694-6520-3-git-send-email-zohar@linux.ibm.com
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1a8916ee |
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05-Nov-2019 |
Nayna Jain <nayna@linux.ibm.com> |
powerpc: Detect the secure boot mode of the system This patch defines a function to detect the secure boot state of a PowerNV system. The PPC_SECURE_BOOT config represents the base enablement of secure boot for powerpc. Signed-off-by: Nayna Jain <nayna@linux.ibm.com> Signed-off-by: Eric Richter <erichte@linux.ibm.com> [mpe: Fold in change from Nayna to add "ibm,secureboot" to ids] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/46b003b9-3225-6bf7-9101-ed6580bb748c@linux.ibm.com
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6266a4da |
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05-Nov-2019 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc/64s: Always disable branch profiling for prom_init.o Otherwise the build fails because prom_init is calling symbols it's not allowed to, eg: Error: External symbol 'ftrace_likely_update' referenced from prom_init.c make[3]: *** [arch/powerpc/kernel/Makefile:197: arch/powerpc/kernel/prom_init_check] Error 1 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191106051129.7626-1-mpe@ellerman.id.au
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cd1d55f1 |
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09-Oct-2019 |
Hari Bathini <hbathini@linux.ibm.com> |
powerpc: make syntax for FADump config options in kernel/Makefile readable arch/powerpc/kernel/fadump.c file needs to be compiled in if 'config FA_DUMP' or 'config PRESERVE_FA_DUMP' is set. The current syntax achieves that but looks a bit odd. Fix it for better readability. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/157063484064.11906.3586824898111397624.stgit@hbathini.in.ibm.com
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bec53196 |
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11-Sep-2019 |
Hari Bathini <hbathini@linux.ibm.com> |
powerpc/fadump: add support to preserve crash data on FADUMP disabled kernel Add a new kernel config option, CONFIG_PRESERVE_FA_DUMP that ensures that crash data, from previously crash'ed kernel, is preserved. This helps in cases where FADump is not enabled but the subsequent memory preserving kernel boot is likely to process this crash data. One typical usecase for this config option is petitboot kernel. As OPAL allows registering address with it in the first kernel and retrieving it after MPIPL, use it to store the top of boot memory. A kernel that intends to preserve crash data retrieves it and avoids using memory beyond this address. Move arch_reserved_kernel_pages() function as it is needed for both FA_DUMP and PRESERVE_FA_DUMP configurations. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/156821375751.5656.11459483669542541602.stgit@hbathini.in.ibm.com
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1fdfa4c6 |
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12-Sep-2019 |
Masahiro Yamada <yamada.masahiro@socionext.com> |
powerpc: improve prom_init_check rule This slightly improves the prom_init_check rule. [1] Avoid needless check Currently, prom_init_check.sh is invoked every time you run 'make' even if you have changed nothing in prom_init.c. With this commit, the script is re-run only when prom_init.o is recompiled. [2] Beautify the build log Currently, the O= build shows the absolute path to the script: CALL /abs/path/to/source/of/linux/arch/powerpc/kernel/prom_init_check.sh With this commit, it is always a relative path to the timestamp file: PROMCHK arch/powerpc/kernel/prom_init_check Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190912074037.13813-1-yamada.masahiro@socionext.com
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136bc039 |
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19-Aug-2019 |
Thiago Jung Bauermann <bauerman@linux.ibm.com> |
powerpc/pseries: Introduce option to build secure virtual machines Introduce CONFIG_PPC_SVM to control support for secure guests and include Ultravisor-related helpers when it is selected Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190820021326.6884-3-bauerman@linux.ibm.com
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a49dddbd |
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21-Aug-2019 |
Claudio Carvalho <cclaudio@linux.ibm.com> |
powerpc/kernel: Add ucall_norets() ultravisor call handler The ultracalls (ucalls for short) allow the Secure Virtual Machines (SVM)s and hypervisor to request services from the ultravisor such as accessing a register or memory region that can only be accessed when running in ultravisor-privileged mode. This patch adds the ucall_norets() ultravisor call handler. The specific service needed from an ucall is specified in register R3 (the first parameter to the ucall). Other parameters to the ucall, if any, are specified in registers R4 through R12. Return value of all ucalls is in register R3. Other output values from the ucall, if any, are returned in registers R4 through R12. Each ucall returns specific error codes, applicable in the context of the ucall. However, like with the PowerPC Architecture Platform Reference (PAPR), if no specific error code is defined for a particular situation, then the ucall will fallback to an erroneous parameter-position based code. i.e U_PARAMETER, U_P2, U_P3 etc depending on the ucall parameter that may have caused the error. Every host kernel (powernv) needs to be able to do ucalls in case it ends up being run in a machine with ultravisor enabled. Otherwise, the kernel may crash early in boot trying to access ultravisor resources, for instance, trying to set the partition table entry 0. Secure guests also need to be able to do ucalls and its kernel may not have CONFIG_PPC_POWERNV=y. For that reason, the ucall.S file is placed under arch/powerpc/kernel. If ultravisor is not enabled, the ucalls will be redirected to the hypervisor which must handle/fail the call. Thanks to inputs from Ram Pai and Michael Anderson. Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190822034838.27876-3-cclaudio@linux.ibm.com
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70ed86f4 |
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28-Aug-2019 |
Claudio Carvalho <cclaudio@linux.ibm.com> |
powerpc: Add PowerPC Capabilities ELF note Add the PowerPC name and the PPC_ELFNOTE_CAPABILITIES type in the kernel binary ELF note. This type is a bitmap that can be used to advertise kernel capabilities to userland. This patch also defines PPCCAP_ULTRAVISOR_BIT as being the bit zero. Suggested-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com> [ maxiwell: Define the 'PowerPC' type in the elfnote.h ] Signed-off-by: Maxiwell S. Garcia <maxiwell@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190829155021.2915-2-maxiwell@linux.ibm.com
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33dcb37c |
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26-Jul-2019 |
Christoph Hellwig <hch@lst.de> |
dma-mapping: fix page attributes for dma_mmap_* All the way back to introducing dma_common_mmap we've defaulted to mark the pages as uncached. But this is wrong for DMA coherent devices. Later on DMA_ATTR_WRITE_COMBINE also got incorrect treatment as that flag is only treated special on the alloc side for non-coherent devices. Introduce a new dma_pgprot helper that deals with the check for coherent devices so that only the remapping cases ever reach arch_dma_mmap_pgprot and we thus ensure no aliasing of page attributes happens, which makes the powerpc version of arch_dma_mmap_pgprot obsolete and simplifies the remaining ones. Note that this means arch_dma_mmap_pgprot is a bit misnamed now, but we'll phase it out soon. Fixes: 64ccc9c033c6 ("common: dma-mapping: add support for generic dma_mmap_* calls") Reported-by: Shawn Anastasio <shawn@anastas.io> Reported-by: Gavin Li <git@thegavinli.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> # arm64
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b4fc36e6 |
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17-Jul-2019 |
Shawn Anastasio <shawn@anastas.io> |
powerpc/dma: Fix invalid DMA mmap behavior The refactor of powerpc DMA functions in commit 6666cc17d780 ("powerpc/dma: remove dma_nommu_mmap_coherent") incorrectly changes the way DMA mappings are handled on powerpc. Since this change, all mapped pages are marked as cache-inhibited through the default implementation of arch_dma_mmap_pgprot. This differs from the previous behavior of only marking pages in noncoherent mappings as cache-inhibited and has resulted in sporadic system crashes in certain hardware configurations and workloads (see Bugzilla). This commit restores the previous correct behavior by providing an implementation of arch_dma_mmap_pgprot that only marks pages in noncoherent mappings as cache-inhibited. As this behavior should be universal for all powerpc platforms a new file, dma-generic.c, was created to store it. Fixes: 6666cc17d780 ("powerpc/dma: remove dma_nommu_mmap_coherent") # NOTE: fixes commit 6666cc17d780 released in v5.1. # Consider a stable tag: # Cc: stable@vger.kernel.org # v5.1+ # NOTE: fixes commit 6666cc17d780 released in v5.1. # Consider a stable tag: # Cc: stable@vger.kernel.org # v5.1+ Cc: stable@vger.kernel.org # v5.1+ Signed-off-by: Shawn Anastasio <shawn@anastas.io> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190717235437.12908-1-shawn@anastas.io
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a278e7ea |
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03-Jun-2019 |
Michael Neuling <mikey@neuling.org> |
powerpc: Fix compile issue with force DAWR If you compile with KVM but without CONFIG_HAVE_HW_BREAKPOINT you fail at linking with: arch/powerpc/kvm/book3s_hv_rmhandlers.o:(.text+0x708): undefined reference to `dawr_force_enable' This was caused by commit c1fe190c0672 ("powerpc: Add force enable of DAWR on P9 option"). This moves a bunch of code around to fix this. It moves a lot of the DAWR code in a new file and creates a new CONFIG_PPC_DAWR to enable compiling it. Fixes: c1fe190c0672 ("powerpc: Add force enable of DAWR on P9 option") Signed-off-by: Michael Neuling <mikey@neuling.org> [mpe: Minor formatting in set_dawr()] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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f072015c |
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26-Apr-2019 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc: disable KASAN instrumentation on early/critical files. All files containing functions run before kasan_early_init() is called must have KASAN instrumentation disabled. For those file, branch profiling also have to be disabled otherwise each if () generates a call to ftrace_likely_update(). Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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d69ca6ba |
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26-Apr-2019 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc/32: Move early_init() in a separate file In preparation of KASAN, move early_init() into a separate file in order to allow deactivation of KASAN for that function. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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fb0b0a73 |
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21-Feb-2019 |
Andrew Donnellan <andrew.donnellan@au1.ibm.com> |
powerpc: Enable kcov kcov provides kernel coverage data that's useful for fuzzing tools like syzkaller. Wire up kcov support on powerpc. Disable kcov instrumentation on the same files where we currently disable gcov and UBSan instrumentation, plus some additional exclusions which appear necessary to boot on book3e machines. Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: Dmitry Vyukov <dvyukov@google.com> Tested-by: Daniel Axtens <dja@axtens.net> # e6500 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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68005b67 |
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13-Feb-2019 |
Christoph Hellwig <hch@lst.de> |
powerpc/dma: use the generic direct mapping bypass Now that we've switched all the powerpc nommu and swiotlb methods to use the generic dma_direct_* calls we can remove these ops vectors entirely and rely on the common direct mapping bypass that avoids indirect function calls entirely. This also allows to remove a whole lot of boilerplate code related to setting up these operations. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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11ddce15 |
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13-Feb-2019 |
Christoph Hellwig <hch@lst.de> |
dma-mapping, powerpc: simplify the arch dma_set_mask override Instead of letting the architecture supply all of dma_set_mask just give it an additional hook selected by Kconfig. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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ab66dcc7 |
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17-Dec-2018 |
Firoz Khan <firoz.khan@linaro.org> |
powerpc: generate uapi header and system call table files System call table generation script must be run to gener- ate unistd_32/64.h and syscall_table_32/64/c32/spu.h files. This patch will have changes which will invokes the script. This patch will generate unistd_32/64.h and syscall_table- _32/64/c32/spu.h files by the syscall table generation script invoked by parisc/Makefile and the generated files against the removed files must be identical. The generated uapi header file will be included in uapi/- asm/unistd.h and generated system call table header file will be included by kernel/systbl.S file. Signed-off-by: Firoz Khan <firoz.khan@linaro.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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d7cceda9 |
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17-Nov-2018 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc: change CONFIG_6xx to CONFIG_PPC_BOOK3S_32 Today we have: config PPC_BOOK3S_32 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx" [depends on PPC32 within a choice] config PPC_BOOK3S def_bool y depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 config 6xx def_bool y depends on PPC32 && PPC_BOOK3S 6xx is therefore redundant with PPC_BOOK3S_32. In order to make the code clearer, lets use preferably PPC_BOOK3S_32. This will allow to remove CONFIG_6xx in a later patch. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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23ad1a27 |
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09-Oct-2018 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc: Add -Werror at arch/powerpc level Back when I added -Werror in commit ba55bd74360e ("powerpc: Add configurable -Werror for arch/powerpc") I did it by adding it to most of the arch Makefiles. At the time we excluded math-emu, because apparently it didn't build cleanly. But that seems to have been fixed somewhere in the interim. So move the -Werror addition to the top-level of the arch, this saves us from repeating it in every Makefile and means we won't forget to add it to any new sub-dirs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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aea44714 |
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17-Sep-2018 |
Joel Stanley <joel@jms.id.au> |
powerpc: Disable -Wbuiltin-requires-header when setjmp is used The powerpc kernel uses setjmp which causes a warning when building with clang: In file included from arch/powerpc/xmon/xmon.c:51: ./arch/powerpc/include/asm/setjmp.h:15:13: error: declaration of built-in function 'setjmp' requires inclusion of the header <setjmp.h> [-Werror,-Wbuiltin-requires-header] extern long setjmp(long *); ^ ./arch/powerpc/include/asm/setjmp.h:16:13: error: declaration of built-in function 'longjmp' requires inclusion of the header <setjmp.h> [-Werror,-Wbuiltin-requires-header] extern void longjmp(long *, long); ^ This *is* the header and we're not using the built-in setjump but rather the one in arch/powerpc/kernel/misc.S. As the compiler warning does not make sense, it for the files where setjmp is used. Signed-off-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> [mpe: Move subdir-ccflags in xmon/Makefile to not clobber -Werror] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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c3ff2a51 |
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27-Sep-2018 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc/32: add stack protector support This functionality was tentatively added in the past (commit 6533b7c16ee5 ("powerpc: Initial stack protector (-fstack-protector) support")) but had to be reverted (commit f2574030b0e3 ("powerpc: Revert the initial stack protector support") because of GCC implementing it differently whether it had been built with libc support or not. Now, GCC offers the possibility to manually set the stack-protector mode (global or tls) regardless of libc support. This time, the patch selects HAVE_STACKPROTECTOR only if -mstack-protector-guard=tls is supported by GCC. On PPC32, as register r2 points to current task_struct at all time, the stack_canary located inside task_struct can be used directly by using the following GCC options: -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 -mstack-protector-guard-offset=offsetof(struct task_struct, stack_canary)) The protector is disabled for prom_init and bootx_init as it is too early to handle it properly. $ echo CORRUPT_STACK > /sys/kernel/debug/provoke-crash/DIRECT [ 134.943666] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: lkdtm_CORRUPT_STACK+0x64/0x64 [ 134.943666] [ 134.955414] CPU: 0 PID: 283 Comm: sh Not tainted 4.18.0-s3k-dev-12143-ga3272be41209 #835 [ 134.963380] Call Trace: [ 134.965860] [c6615d60] [c001f76c] panic+0x118/0x260 (unreliable) [ 134.971775] [c6615dc0] [c001f654] panic+0x0/0x260 [ 134.976435] [c6615dd0] [c032c368] lkdtm_CORRUPT_STACK_STRONG+0x0/0x64 [ 134.982769] [c6615e00] [ffffffff] 0xffffffff Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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2a056f58 |
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13-Sep-2018 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc: consolidate -mno-sched-epilog into FTRACE flags Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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badf436f |
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06-Aug-2018 |
Rodrigo R. Galvao <rosattig@linux.vnet.ibm.com> |
powerpc/Makefiles: Convert ifeq to ifdef where possible In Makefiles if we're testing a CONFIG_FOO symbol for equality with 'y' we can instead just use ifdef. The latter reads easily, so convert to it where possible. Signed-off-by: Rodrigo R. Galvao <rosattig@linux.vnet.ibm.com> Reviewed-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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179ab1cb |
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27-Jul-2018 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc/64: Add CONFIG_PPC_BARRIER_NOSPEC Add a config symbol to encode which platforms support the barrier_nospec speculation barrier. Currently this is just Book3S 64 but we will add Book3E in a future patch. Signed-off-by: Diana Craciun <diana.craciun@nxp.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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9a868f63 |
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27-Mar-2018 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc: Add security feature flags for Spectre/Meltdown This commit adds security feature flags to reflect the settings we receive from firmware regarding Spectre/Meltdown mitigations. The feature names reflect the names we are given by firmware on bare metal machines. See the hostboot source for details. Arguably these could be firmware features, but that then requires them to be read early in boot so they're available prior to asm feature patching, but we don't actually want to use them for patching. We may also want to dynamically update them in future, which would be incompatible with the way firmware features work (at the moment at least). So for now just make them separate flags. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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f49821ee |
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10-Feb-2018 |
Nicholas Piggin <npiggin@gmail.com> |
kbuild: rename built-in.o to built-in.a Incremental linking is gone, so rename built-in.o to built-in.a, which is the usual extension for archive files. This patch does two things, first is a simple search/replace: git grep -l 'built-in\.o' | xargs sed -i 's/built-in\.o/built-in\.a/g' The second is to invert nesting of nested text manipulations to avoid filtering built-in.a out from libs-y2: -libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.a, $(libs-y))) +libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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fc2a5a61 |
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02-Nov-2017 |
Stephen Rothwell <sfr@canb.auug.org.au> |
powerpc/64s: ppc_save_regs is now needed for all 64s builds Commit 78adf6c214f0 ("powerpc/64s: Implement system reset idle wakeup reason"), added a call to ppc_save_regs() in the book3s code. ppc_save_regs() is only built if XMON and/or KEXEC_CORE are enabled, which is usually the case, however if they're not enabled then the build breaks. Fix it by making the Makefile check also build ppc_save_regs.o if CONFIG_PPC_BOOK3S is enabled. Fixes: 78adf6c214f0 ("powerpc/64s: Implement system reset idle wakeup reason") Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> [mpe: Write change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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b2441318 |
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01-Nov-2017 |
Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
License cleanup: add SPDX GPL-2.0 license identifier to files with no license Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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968159c0 |
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08-Aug-2017 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc/8xx: Getting rid of remaining use of CONFIG_8xx Two config options exist to define powerpc MPC8xx: * CONFIG_PPC_8xx * CONFIG_8xx arch/powerpc/platforms/Kconfig.cputype has contained the following comment about CONFIG_8xx item for some years: "# this is temp to handle compat with arch=ppc" arch/powerpc is now the only place with remaining use of CONFIG_8xx: get rid of them. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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75eb767e |
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01-Aug-2017 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc: Fix powerpc-specific watchdog build configuration The powerpc kernel/watchdog.o should be built when HARDLOCKUP_DETECTOR and HAVE_HARDLOCKUP_DETECTOR_ARCH are both selected. If only the former is selected, then the generic perf watchdog has been selected. To simplify this check, introduce a new Kconfig symbol PPC_WATCHDOG that depends on both. This Kconfig option means the powerpc specific watchdog is enabled. Without this patch, Book3E will attempt to build the powerpc watchdog. Fixes: 2104180a53 ("powerpc/64s: implement arch-specific hardlockup watchdog") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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2104180a |
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12-Jul-2017 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc/64s: implement arch-specific hardlockup watchdog Implement an arch-speicfic watchdog rather than use the perf-based hardlockup detector. The new watchdog takes the soft-NMI directly, rather than going through perf. Perf interrupts are to be made maskable in future, so that would prevent the perf detector from working in those regions. Additionally, implement a SMP based detector where all CPUs watch one another by pinging a shared cpumask. This is because powerpc Book3S does not have a true periodic local NMI, but some platforms do implement a true NMI IPI. If a CPU is stuck with interrupts hard disabled, the soft-NMI watchdog does not work, but the SMP watchdog will. Even on platforms without a true NMI IPI to get a good trace from the stuck CPU, other CPUs will notice the lockup sufficiently to report it and panic. [npiggin@gmail.com: honor watchdog disable at boot/hotplug] Link: http://lkml.kernel.org/r/20170621001346.5bb337c9@roar.ozlabs.ibm.com [npiggin@gmail.com: fix false positive warning at CPU unplug] Link: http://lkml.kernel.org/r/20170630080740.20766-1-npiggin@gmail.com [akpm@linux-foundation.org: coding-style fixes] Link: http://lkml.kernel.org/r/20170616065715.18390-6-npiggin@gmail.com Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Don Zickus <dzickus@redhat.com> Tested-by: Babu Moger <babu.moger@oracle.com> [sparc] Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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6b847d79 |
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20-Jun-2017 |
Santosh Sivaraj <santosh@fossix.org> |
powerpc/time: Fix tracing in time.c Since trace_clock is in a different file and already marked with notrace, enable tracing in time.c by removing it from the disabled list in Makefile. Also annotate clocksource read functions and sched_clock with notrace. Testing: Timer and ftrace selftests run with different trace clocks. Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Santosh Sivaraj <santosh@fossix.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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5a61ef74 |
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08-May-2017 |
Nicholas Piggin <npiggin@gmail.com> |
powerpc/64s: Support new device tree binding for discovering CPU features The ibm,powerpc-cpu-features device tree binding describes CPU features with ASCII names and extensible compatibility, privilege, and enablement metadata that allows improved flexibility and compatibility with new hardware. The interface is described in detail in ibm,powerpc-cpu-features.txt in this patch. Currently this code is not enabled by default, and there are no released firmwares that provide the binding. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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7853f9c0 |
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25-Apr-2017 |
Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> |
powerpc: Split ftrace bits into a separate file entry_*.S now includes a lot more than just kernel entry/exit code. As a first step at cleaning this up, let's split out the ftrace bits into separate files. Also move all related tracing code into a new trace/ subdirectory. No functional changes. Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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#
ead514d5 |
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19-Apr-2017 |
Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> |
powerpc/kprobes: Add support for KPROBES_ON_FTRACE Allow kprobes to be placed on ftrace _mcount() call sites. This optimization avoids the use of a trap, by riding on ftrace infrastructure. This depends on HAVE_DYNAMIC_FTRACE_WITH_REGS which depends on MPROFILE_KERNEL, which is only currently enabled on powerpc64le with newer toolchains. Based on the x86 code by Masami. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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51c9c084 |
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08-Feb-2017 |
Anju T <anju@linux.vnet.ibm.com> |
powerpc/kprobes: Implement Optprobes Current infrastructure of kprobe uses the unconditional trap instruction to probe a running kernel. Optprobe allows kprobe to replace the trap with a branch instruction to a detour buffer. Detour buffer contains instructions to create an in memory pt_regs. Detour buffer also has a call to optimized_callback() which in turn call the pre_handler(). After the execution of the pre-handler, a call is made for instruction emulation. The NIP is determined in advanced through dummy instruction emulation and a branch instruction is created to the NIP at the end of the trampoline. To address the limitation of branch instruction in POWER architecture, detour buffer slot is allocated from a reserved area. For the time being, 64KB is reserved in memory for this purpose. Instructions which can be emulated using analyse_instr() are the candidates for optimization. Before optimization ensure that the address range between the detour buffer allocated and the instruction being probed is within +/- 32MB. Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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eac6f8b0 |
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05-Dec-2016 |
Andrew Donnellan <andrew.donnellan@au1.ibm.com> |
powerpc: Correctly disable latent entropy GCC plugin on prom_init.o Commit 38addce8b600 ("gcc-plugins: Add latent_entropy plugin") excludes certain powerpc early boot code from the latent entropy plugin by adding appropriate CFLAGS. It looks like this was supposed to cover prom_init.o, but ended up saying init.o (which doesn't exist) instead. Fix the typo. Fixes: 38addce8b600 ("gcc-plugins: Add latent_entropy plugin") Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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f2574030 |
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24-Jan-2017 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc: Revert the initial stack protector support Unfortunately the stack protector support we merged recently only works on some toolchains. If the toolchain is built without glibc support everything works fine, but if glibc is built then it leads to a panic at boot. The solution is not rc5 material, so revert the support for now. This reverts commits: 6533b7c16ee5 ("powerpc: Initial stack protector (-fstack-protector) support") 902e06eb86cd ("powerpc/32: Change the stack protector canary value per task") Fixes: 6533b7c16ee5 ("powerpc: Initial stack protector (-fstack-protector) support") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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467d2782 |
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19-Dec-2016 |
Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> |
powerpc: ima: get the kexec buffer passed by the previous kernel Patch series "ima: carry the measurement list across kexec", v8. The TPM PCRs are only reset on a hard reboot. In order to validate a TPM's quote after a soft reboot (eg. kexec -e), the IMA measurement list of the running kernel must be saved and then restored on the subsequent boot, possibly of a different architecture. The existing securityfs binary_runtime_measurements file conveniently provides a serialized format of the IMA measurement list. This patch set serializes the measurement list in this format and restores it. Up to now, the binary_runtime_measurements was defined as architecture native format. The assumption being that userspace could and would handle any architecture conversions. With the ability of carrying the measurement list across kexec, possibly from one architecture to a different one, the per boot architecture information is lost and with it the ability of recalculating the template digest hash. To resolve this problem, without breaking the existing ABI, this patch set introduces the boot command line option "ima_canonical_fmt", which is arbitrarily defined as little endian. The need for this boot command line option will be limited to the existing version 1 format of the binary_runtime_measurements. Subsequent formats will be defined as canonical format (eg. TPM 2.0 support for larger digests). A simplified method of Thiago Bauermann's "kexec buffer handover" patch series for carrying the IMA measurement list across kexec is included in this patch set. The simplified method requires all file measurements be taken prior to executing the kexec load, as subsequent measurements will not be carried across the kexec and restored. This patch (of 10): The IMA kexec buffer allows the currently running kernel to pass the measurement list via a kexec segment to the kernel that will be kexec'd. The second kernel can check whether the previous kernel sent the buffer and retrieve it. This is the architecture-specific part which enables IMA to receive the measurement list passed by the previous kernel. It will be used in the next patch. The change in machine_kexec_64.c is to factor out the logic of removing an FDT memory reservation so that it can be used by remove_ima_buffer. Link: http://lkml.kernel.org/r/1480554346-29071-2-git-send-email-zohar@linux.vnet.ibm.com Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Andreas Steffen <andreas.steffen@strongswan.org> Cc: Dmitry Kasatkin <dmitry.kasatkin@gmail.com> Cc: Josh Sklar <sklar@linux.vnet.ibm.com> Cc: Dave Young <dyoung@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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a0458284 |
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29-Nov-2016 |
Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> |
powerpc: Add support code for kexec_file_load() This patch adds the support code needed for implementing kexec_file_load() on powerpc. This consists of functions to load the ELF kernel, either big or little endian, and setup the purgatory enviroment which switches from the first kernel to the second kernel. None of this code is built yet, as it depends on CONFIG_KEXEC_FILE which we have not yet defined. Although we could define CONFIG_KEXEC_FILE in this patch, we'd then have a window in history where the kconfig symbol is present but the syscall is not, which would be awkward. Signed-off-by: Josh Sklar <sklar@linux.vnet.ibm.com> Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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da665885 |
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29-Nov-2016 |
Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> |
powerpc: Change places using CONFIG_KEXEC to use CONFIG_KEXEC_CORE instead. Commit 2965faa5e03d ("kexec: split kexec_load syscall from kexec core code") introduced CONFIG_KEXEC_CORE so that CONFIG_KEXEC means whether the kexec_load system call should be compiled-in and CONFIG_KEXEC_FILE means whether the kexec_file_load system call should be compiled-in. These options can be set independently from each other. Since until now powerpc only supported kexec_load, CONFIG_KEXEC and CONFIG_KEXEC_CORE were synonyms. That is not the case anymore, so we need to make a distinction. Almost all places where CONFIG_KEXEC was being used should be using CONFIG_KEXEC_CORE instead, since kexec_file_load also needs that code compiled in. Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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6533b7c1 |
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22-Nov-2016 |
Christophe Leroy <christophe.leroy@c-s.fr> |
powerpc: Initial stack protector (-fstack-protector) support Partialy copied from commit c743f38013aef ("ARM: initial stack protector (-fstack-protector) support") This is the very basic stuff without the changing canary upon task switch yet. Just the Kconfig option and a constant canary value initialized at boot time. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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30757de2 |
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14-Nov-2016 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc/pseries: Move ibmebus.c into platforms pseries ibmebus.c is pseries only code, so move it in there. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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139ac5af |
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14-Nov-2016 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc/pseries: Move vio.c into platforms pseries vio.c is pseries only code, so move it in there. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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38addce8 |
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20-Jun-2016 |
Emese Revfy <re.emese@gmail.com> |
gcc-plugins: Add latent_entropy plugin This adds a new gcc plugin named "latent_entropy". It is designed to extract as much possible uncertainty from a running system at boot time as possible, hoping to capitalize on any possible variation in CPU operation (due to runtime data differences, hardware differences, SMP ordering, thermal timing variation, cache behavior, etc). At the very least, this plugin is a much more comprehensive example for how to manipulate kernel code using the gcc plugin internals. The need for very-early boot entropy tends to be very architecture or system design specific, so this plugin is more suited for those sorts of special cases. The existing kernel RNG already attempts to extract entropy from reliable runtime variation, but this plugin takes the idea to a logical extreme by permuting a global variable based on any variation in code execution (e.g. a different value (and permutation function) is used to permute the global based on loop count, case statement, if/then/else branching, etc). To do this, the plugin starts by inserting a local variable in every marked function. The plugin then adds logic so that the value of this variable is modified by randomly chosen operations (add, xor and rol) and random values (gcc generates separate static values for each location at compile time and also injects the stack pointer at runtime). The resulting value depends on the control flow path (e.g., loops and branches taken). Before the function returns, the plugin mixes this local variable into the latent_entropy global variable. The value of this global variable is added to the kernel entropy pool in do_one_initcall() and _do_fork(), though it does not credit any bytes of entropy to the pool; the contents of the global are just used to mix the pool. Additionally, the plugin can pre-initialize arrays with build-time random contents, so that two different kernel builds running on identical hardware will not have the same starting values. Signed-off-by: Emese Revfy <re.emese@gmail.com> [kees: expanded commit message and code comments] Signed-off-by: Kees Cook <keescook@chromium.org>
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68201fbb |
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11-Aug-2016 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc/Makefile: Drop CONFIG_WORD_SIZE for BITS Commit 2578bfae84a7 ("[POWERPC] Create and use CONFIG_WORD_SIZE") added CONFIG_WORD_SIZE, and suggests that other arches were going to do likewise. But that never happened, powerpc is the only architecture which uses it. So switch to using a simple make variable, BITS, like x86, sh, sparc and tile. It is also easier to spell and simpler, avoiding any confusion about whether it's defined due to ordering of make vs kconfig. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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3f257774 |
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11-Aug-2016 |
Paolo Bonzini <pbonzini@redhat.com> |
powerpc: move hmi.c to arch/powerpc/kvm/ hmi.c functions are unused unless sibling_subcore_state is nonzero, and that in turn happens only if KVM is in use. So move the code to arch/powerpc/kvm/, putting it under CONFIG_KVM_BOOK3S_HV_POSSIBLE rather than CONFIG_PPC_BOOK3S_64. The sibling_subcore_state is also included in struct paca_struct only if KVM is supported by the kernel. Cc: Daniel Axtens <dja@axtens.net> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org Cc: kvm@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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7c379526 |
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11-Aug-2016 |
Paolo Bonzini <pbonzini@redhat.com> |
powerpc: move hmi.c to arch/powerpc/kvm/ hmi.c functions are unused unless sibling_subcore_state is nonzero, and that in turn happens only if KVM is in use. So move the code to arch/powerpc/kvm/, putting it under CONFIG_KVM_BOOK3S_HV_POSSIBLE rather than CONFIG_PPC_BOOK3S_64. The sibling_subcore_state is also included in struct paca_struct only if KVM is supported by the kernel. Cc: Daniel Axtens <dja@axtens.net> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org Cc: kvm@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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9445aa1a |
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13-Jan-2016 |
Al Viro <viro@zeniv.linux.org.uk> |
ppc: move exports to definitions Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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27d11496 |
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12-Jul-2016 |
Kevin Hao <haokexin@gmail.com> |
powerpc/32: Remove RELOCATABLE_PPC32 It is seldom used in the kernel code and can be easily replaced by either RELOCATABLE or PPC32. So there is no reason to keep a separate kernel option for this. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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83289f90 |
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08-Jul-2016 |
Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> |
powerpc/powernv: Rename idle_power7.S to idle_book3s.S idle_power7.S handles idle entry/exit for POWER7, POWER8 and in next patch for POWER9. Rename the file to a non-hardware specific name. Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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fd7bacbc |
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14-May-2016 |
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> |
KVM: PPC: Book3S HV: Fix TB corruption in guest exit path on HMI interrupt When a guest is assigned to a core it converts the host Timebase (TB) into guest TB by adding guest timebase offset before entering into guest. During guest exit it restores the guest TB to host TB. This means under certain conditions (Guest migration) host TB and guest TB can differ. When we get an HMI for TB related issues the opal HMI handler would try fixing errors and restore the correct host TB value. With no guest running, we don't have any issues. But with guest running on the core we run into TB corruption issues. If we get an HMI while in the guest, the current HMI handler invokes opal hmi handler before forcing guest to exit. The guest exit path subtracts the guest TB offset from the current TB value which may have already been restored with host value by opal hmi handler. This leads to incorrect host and guest TB values. With split-core, things become more complex. With split-core, TB also gets split and each subcore gets its own TB register. When a hmi handler fixes a TB error and restores the TB value, it affects all the TB values of sibling subcores on the same core. On TB errors all the thread in the core gets HMI. With existing code, the individual threads call opal hmi handle independently which can easily throw TB out of sync if we have guest running on subcores. Hence we will need to co-ordinate with all the threads before making opal hmi handler call followed by TB resync. This patch introduces a sibling subcore state structure (shared by all threads in the core) in paca which holds information about whether sibling subcores are in Guest mode or host mode. An array in_guest[] of size MAX_SUBCORE_PER_CORE=4 is used to maintain the state of each subcore. The subcore id is used as index into in_guest[] array. Only primary thread entering/exiting the guest is responsible to set/unset its designated array element. On TB error, we get HMI interrupt on every thread on the core. Upon HMI, this patch will now force guest to vacate the core/subcore. Primary thread from each subcore will then turn off its respective bit from the above bitmap during the guest exit path just after the guest->host partition switch is complete. All other threads that have just exited the guest OR were already in host will wait until all other subcores clears their respective bit. Once all the subcores turn off their respective bit, all threads will will make call to opal hmi handler. It is not necessary that opal hmi handler would resync the TB value for every HMI interrupts. It would do so only for the HMI caused due to TB errors. For rest, it would not touch TB value. Hence to make things simpler, primary thread would call TB resync explicitly once for each core immediately after opal hmi handler instead of subtracting guest offset from TB. TB resync call will restore the TB with host value. Thus we can be sure about the TB state. One of the primary threads exiting the guest will take up the responsibility of calling TB resync. It will use one of the top bits (bit 63) from subcore state flags bitmap to make the decision. The first primary thread (among the subcores) that is able to set the bit will have to call the TB resync. Rest all other threads will wait until TB resync is complete. Once TB resync is complete all threads will then proceed. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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9a7841ae |
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02-Mar-2016 |
Torsten Duwe <duwe@lst.de> |
powerpc/ftrace: Use $(CC_FLAGS_FTRACE) when disabling ftrace Rather than open-coding -pg whereever we want to disable ftrace, use the existing $(CC_FLAGS_FTRACE) variable. This has the advantage that it will work in future when we use a different set of flags to enable ftrace. Signed-off-by: Torsten Duwe <duwe@suse.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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bf76f73c |
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20-Jan-2016 |
Daniel Axtens <dja@axtens.net> |
powerpc: enable UBSAN support This hooks up UBSAN support for PowerPC. So far it's found some interesting cases where we don't properly sanitise input to shifts, including one in our futex handling. Nothing critical, but interesting and worth fixing. [valentinrothberg@gmail.com: arch/powerpc/Kconfig: fix typo in select statement] Signed-off-by: Daniel Axtens <dja@axtens.net> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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197165d4 |
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24-Apr-2015 |
Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> |
powerpc/ftrace: add powerpc timebase as a trace clock source Add a new powerpc-specific trace clock using the timebase register, similar to x86-tsc. This gives us - a fast, monotonic, hardware clock source for trace entries, and - a clock that can be used to correlate events across cpus as well as across hypervisor and guests. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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63a4aea5 |
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01-Jun-2015 |
Rob Herring <robh@kernel.org> |
of: clean-up unnecessary libfdt include paths With the libfdt include fixups to use "" instead of <> in the latest dtc import in commit 4760597 (scripts/dtc: Update to upstream version 9d3649bd3be245c9), it is no longer necessary to add explicit include paths to use libfdt. Remove these across the kernel. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Grant Likely <grant.likely@linaro.org> Cc: linux-mips@linux-mips.org Cc: linuxppc-dev@lists.ozlabs.org
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e0d00591 |
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11-May-2015 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc/vdso: Disable building the 32-bit VDSO on little endian The only little endian configuration we support is ppc64le. As such if we're building little endian we don't need a 32-bit VDSO, because there is no 32-bit userspace. This patch is a fairly ugly mess of #ifdefs, but is the minimal logic required to disable the 32-bit VDSO. We can hopefully clean up the result in future with some further refactoring. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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52d99627 |
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12-Mar-2015 |
Kevin Hao <haokexin@gmail.com> |
powerpc: kill PPC_OF We have set CONFIG_PPC_OF to always 'y' in commit 0a498d96a332 ("powerpc: set CONFIG_PPC_OF=y always for ARCH=powerpc") nine years ago. And the arch/ppc also has gone away for many years. The OF functionality was also moved to a common place and be used by many archs. So it does make no sense to keep such a option in the current kernel. Just kill it. Signed-off-by: Kevin Hao <haokexin@gmail.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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5144b6bf |
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19-Aug-2014 |
Anton Blanchard <anton@samba.org> |
powerpc: Separate ppc32 symbol exports into ppc_ksyms_32.c Simplify things considerably by moving all the ppc32 specific symbol exports into its own file. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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fb5a5157 |
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01-Jun-2014 |
Michael Ellerman <mpe@ellerman.id.au> |
powerpc: Remove platforms/wsp and associated pieces __attribute__ ((unused)) WSP is the last user of CONFIG_PPC_A2, so we remove that as well. Although CONFIG_PPC_ICSWX still exists, it's no longer selectable for any Book3E platform, so we can remove the code in mmu-book3e.h that depended on it. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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060f78c2 |
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31-Mar-2014 |
Rob Herring <robh@kernel.org> |
powerpc: use libfdt accessors for header data With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
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#
7d71d5b2 |
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30-Nov-2013 |
Gerhard Sittig <gsi@denx.de> |
clk: mpc5xxx: switch to COMMON_CLK, retire PPC_CLOCK the setup before the change was - arch/powerpc/Kconfig had the PPC_CLOCK option, off by default - depending on the PPC_CLOCK option the arch/powerpc/kernel/clock.c file was built, which implements the clk.h API but always returns -ENOSYS unless a platform registers specific callbacks - the MPC52xx platform selected PPC_CLOCK but did not register any callbacks, thus all clk.h API calls keep resulting in -ENOSYS errors (which is OK, all peripheral drivers deal with the situation) - the MPC512x platform selected PPC_CLOCK and registered specific callbacks implemented in arch/powerpc/platforms/512x/clock.c, thus provided real support for the clock API - no other powerpc platform did select PPC_CLOCK the situation after the change is - the MPC512x platform implements the COMMON_CLK interface, and thus the PPC_CLOCK approach in arch/powerpc/platforms/512x/clock.c has become obsolete - the MPC52xx platform still lacks genuine support for the clk.h API while this is not a change against the previous situation (the error code returned from COMMON_CLK stubs differs but every call still results in an error) - with all references gone, the arch/powerpc/kernel/clock.c wrapper and the PPC_CLOCK option have become obsolete, as did the clk_interface.h header file the switch from PPC_CLOCK to COMMON_CLK is done for all platforms within the same commit such that multiplatform kernels (the combination of 512x and 52xx within one executable) keep working Cc: Mike Turquette <mturquette@linaro.org> Cc: Anatolij Gustschin <agust@denx.de> Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
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36df96f8 |
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30-Oct-2013 |
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> |
powerpc/book3s: Decode and save machine check event. Now that we handle machine check in linux, the MCE decoding should also take place in linux host. This info is crucial to log before we go down in case we can not handle the machine check errors. This patch decodes and populates a machine check event which contain high level meaning full MCE information. We do this in real mode C code with ME bit on. The MCE information is still available on emergency stack (in pt_regs structure format). Even if we take another exception at this point the MCE early handler will allocate a new stack frame on top of current one. So when we return back here we still have our MCE information safe on current stack. We use per cpu buffer to save high level MCE information. Each per cpu buffer is an array of machine check event structure indexed by per cpu counter mce_nest_count. The mce_nest_count is incremented every time we enter machine check early handler in real mode to get the current free slot (index = mce_nest_count - 1). The mce_nest_count is decremented once the MCE info is consumed by virtual mode machine exception handler. This patch provides save_mce_event(), get_mce_event() and release_mce_event() generic routines that can be used by machine check handlers to populate and retrieve the event. The routine release_mce_event() will free the event slot so that it can be reused. Caller can invoke get_mce_event() with a release flag either to release the event slot immediately OR keep it so that it can be fetched again. The event slot can be also released anytime by invoking release_mce_event(). This patch also updates kvm code to invoke get_mce_event to retrieve generic mce event rather than paca->opal_mce_evt. The KVM code always calls get_mce_event() with release flags set to false so that event is available for linus host machine If machine check occurs while we are in guest, KVM tries to handle the error. If KVM is able to handle MC error successfully, it enters the guest and delivers the machine check to guest. If KVM is not able to handle MC error, it exists the guest and passes the control to linux host machine check handler which then logs MC event and decides how to handle it in linux host. In failure case, KVM needs to make sure that the MC event is available for linux host to consume. Hence KVM always calls get_mce_event() with release flags set to false and later it invokes release_mce_event() only if it succeeds to handle error. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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e22a2274 |
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30-Oct-2013 |
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> |
powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors on power7. If we get a machine check exception due to SLB or TLB errors, then flush SLBs/TLBs and reload SLBs to recover. We do this in real mode before turning on MMU. Otherwise we would run into nested machine checks. If we get a machine check when we are in guest, then just flush the SLBs and continue. This patch handles errors for power7. The next patch will handle errors for power8 Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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83c93e2b |
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27-Aug-2013 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc/pseries: Move lparcfg.c to platforms/pseries This file is entirely pseries specific nowadays, so move it out of arch/powerpc/kernel where it doesn't belong anymore. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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39cee08b |
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16-Jul-2013 |
Paul Bolle <pebolle@tiscali.nl> |
powerpc/8xx: Remove last traces of 8XX_MINIMAL_FPEMU The Kconfig symbol 8XX_MINIMAL_FPEMU was removed in commit 968219fa33 ("powerpc/8xx: Remove 8xx specific "minimal FPU emulation""). But that commit didn't remove all code depending on that symbol. Do so now. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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ecd73cc5 |
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14-Jul-2013 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc: Better split CONFIG_PPC_INDIRECT_PIO and CONFIG_PPC_INDIRECT_MMIO Remove the generic PPC_INDIRECT_IO and ensure we only add overhead to the right accessors. IE. If only CONFIG_PPC_INDIRECT_PIO is set, we don't add overhead to all MMIO accessors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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317f06de |
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19-Jun-2013 |
Gavin Shan <shangw@linux.vnet.ibm.com> |
powerpc/eeh: Move common part to kernel directory The patch moves the common part of EEH core into arch/powerpc/kernel directory so that we needn't PPC_PSERIES while compiling POWERNV platform: * Move the EEH common part into arch/powerpc/kernel * Move the functions for PCI hotplug from pSeries platform to arch/powerpc/kernel/pci-hotplug.c * Move CONFIG_EEH from arch/powerpc/platforms/pseries/Kconfig to arch/powerpc/platforms/Kconfig * Adjust makefile accordingly Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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98ae22e1 |
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13-Feb-2013 |
Michael Neuling <mikey@neuling.org> |
powerpc: Add helper functions for transactional memory context switching Here we add the helper functions to be used when context switching. These allow us to fully reclaim and recheckpoint a transaction. We introduce a new paca field called tm_scratch to help us store away register values when doing the low level tm reclaim register save. Signed-off-by: Matt Evans <matt@ozlabs.org> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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1fbe9cf2 |
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26-Nov-2012 |
Anton Blanchard <anton@samba.org> |
powerpc: Build kernel with -mcmodel=medium Finally remove the two level TOC and build with -mcmodel=medium. Unfortunately we can't build modules with -mcmodel=medium due to the tricks the kernel module loader plays with percpu data: # -mcmodel=medium breaks modules because it uses 32bit offsets from # the TOC pointer to create pointers where possible. Pointers into the # percpu data area are created by this method. # # The kernel module loader relocates the percpu data section from the # original location (starting with 0xd...) to somewhere in the base # kernel percpu data space (starting with 0xc...). We need a full # 64bit relocation for this to work, hence -mcmodel=large. On older kernels we fall back to the two level TOC (-mminimal-toc) Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
5ac47f7a |
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26-Nov-2012 |
Anton Blanchard <anton@samba.org> |
powerpc: Relocate prom_init.c on 64bit The ppc64 kernel can get loaded at any address which means our very early init code in prom_init.c must be relocatable. We do this with a pretty nasty RELOC() macro that we wrap accesses of variables with. It is very fragile and sometimes we forget to add a RELOC() to an uncommon path or sometimes a compiler change breaks it. 32bit has a much more elegant solution where we build prom_init.c with -mrelocatable and then process the relocations manually. Unfortunately we can't do the equivalent on 64bit and we would have to build the entire kernel relocatable (-pie), resulting in a large increase in kernel footprint (megabytes of relocation data). The relocation data will be marked __initdata but it still creates more pressure on our already tight memory layout at boot. Alan Modra pointed out that the 64bit ABI is relocatable even if we don't build with -pie, we just need to relocate the TOC. This patch implements that idea and relocates the TOC entries of prom_init.c. An added bonus is there are very few relocations to process which helps keep boot times on simulators down. gcc does not put 64bit integer constants into the TOC but to be safe we may want a build time script which passes through the prom_init.c TOC entries to make sure everything looks reasonable. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
440bc685 |
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14-Nov-2012 |
Ian Munsie <imunsie@au1.ibm.com> |
powerpc: Update Kconfig + Makefile to prepare for server doorbells Move the rule to build doorbell support out of the Makefile and into a new Kconfig boolean that platforms can select. We will add doorbell support to pseries as well in the next patch. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Tested-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
cd5daaf7 |
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30-Oct-2012 |
Michael Neuling <mikey@neuling.org> |
powerpc: make POWER7 setup code name generic We are going to reuse this in POWER8 so make the name generic. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
8b7b80b9 |
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23-Aug-2012 |
Ananth N Mavinakayanahalli <ananth@in.ibm.com> |
powerpc: Uprobes port to powerpc This is the port of uprobes to powerpc. Usage is similar to x86. [root@xxxx ~]# ./bin/perf probe -x /lib64/libc.so.6 malloc Added new event: probe_libc:malloc (on 0xb4860) You can now use it in all perf tools, such as: perf record -e probe_libc:malloc -aR sleep 1 [root@xxxx ~]# ./bin/perf record -e probe_libc:malloc -aR sleep 20 [ perf record: Woken up 22 times to write data ] [ perf record: Captured and wrote 5.843 MB perf.data (~255302 samples) ] [root@xxxx ~]# ./bin/perf report --stdio ... 69.05% tar libc-2.12.so [.] malloc 28.57% rm libc-2.12.so [.] malloc 1.32% avahi-daemon libc-2.12.so [.] malloc 0.58% bash libc-2.12.so [.] malloc 0.28% sshd libc-2.12.so [.] malloc 0.08% irqbalance libc-2.12.so [.] malloc 0.05% bzip2 libc-2.12.so [.] malloc 0.04% sleep libc-2.12.so [.] malloc 0.03% multipathd libc-2.12.so [.] malloc 0.01% sendmail libc-2.12.so [.] malloc 0.01% automount libc-2.12.so [.] malloc The trap_nr addition patch is a prereq. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
2e1ae9c0 |
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15-Mar-2012 |
Liu Yu-B13201 <Yu.Liu@freescale.com> |
KVM: PPC: Factor out guest epapr initialization epapr paravirtualization support is now a Kconfig selectable option Signed-off-by: Liu Yu <yu.liu@freescale.com> [stuart.yoder@freescale.com: misc minor fixes, description update] Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
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#
b0ce50aa |
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03-May-2012 |
Thomas Gleixner <tglx@linutronix.de> |
powerpc: Use generic init_task Same code. Use the generic version. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Link: http://lkml.kernel.org/r/20120503085035.211123184@linutronix.de
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#
f2699491 |
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20-Feb-2012 |
Michael Ellerman <michael@ellerman.id.au> |
powerpc/perf: Move perf core & PMU code into a subdirectory The perf code has grown a lot since it started, and is big enough to warrant its own subdirectory. For reference it's ~60% bigger than the oprofile code. It declutters the kernel directory, makes it simpler to grep for "just perf stuff", and allows us to shorten some filenames. While we're at it, make it more obvious that we have two implementations of the core perf logic. One for (roughly) Book3S CPUs, which was the original implementation, and the other for Freescale embedded CPUs. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
eb39c880 |
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15-Feb-2012 |
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> |
fadump: Reserve the memory for firmware assisted dump. Reserve the memory during early boot to preserve CPU state data, HPTE region and RMA (real mode area) region data in case of kernel crash. At the time of crash, powerpc firmware will store CPU state data, HPTE region data and move RMA region data to the reserved memory area. If the firmware-assisted dump fails to reserve the memory, then fallback to existing kexec-based kdump. Most of the code implementation to reserve memory has been adapted from phyp assisted dump implementation written by Linas Vepstas and Manish Ahuja This patch also introduces a config option CONFIG_FA_DUMP for firmware assisted dump feature on Powerpc (ppc64) architecture. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
9c5f7d39 |
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14-Dec-2011 |
Suzuki Poulose <suzuki@in.ibm.com> |
powerpc: Process dynamic relocations for kernel The following patch implements the dynamic relocation processing for PPC32 kernel. relocate() accepts the target virtual address and relocates the kernel image to the same. Currently the following relocation types are handled : R_PPC_RELATIVE R_PPC_ADDR16_LO R_PPC_ADDR16_HI R_PPC_ADDR16_HA The last 3 relocations in the above list depends on value of Symbol indexed whose index is encoded in the Relocation entry. Hence we need the Symbol Table for processing such relocations. Note: The GNU ld for ppc32 produces buggy relocations for relocation types that depend on symbols. The value of the symbols with STB_LOCAL scope should be assumed to be zero. - Alan Modra Signed-off-by: Suzuki K. Poulose <suzuki@in.ibm.com> Signed-off-by: Josh Poimboeuf <jpoimboe@linux.vnet.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Alan Modra <amodra@au1.ibm.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org> Signed-off-by: Josh Boyer <jwboyer@gmail.com>
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#
ac5f89c7 |
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29-Jun-2011 |
Michael Ellerman <michael@ellerman.id.au> |
powerpc: Add jump label support This patch adds support for the new "jump label" feature. Unlike x86 and sparc we just merrily patch the code with no locks etc, as far as I know this is safe, but I'm not really sure what the x86/sparc code is protecting against so maybe it's not. I also don't see any reason for us to implement the poke_early() routine, even though sparc does. [BenH: Updated the patch to upstream generic changes] Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
02424d89 |
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02-Feb-2011 |
Ian Munsie <imunsie@au.ibm.com> |
powerpc/ftrace: Implement raw syscall tracepoints on PowerPC This patch implements the raw syscall tracepoints on PowerPC and exports them for ftrace syscalls to use. To minimise reworking existing code, I slightly re-ordered the thread info flags such that the new TIF_SYSCALL_TRACEPOINT bit would still fit within the 16 bits of the andi. instruction's UI field. The instructions in question are in /arch/powerpc/kernel/entry_{32,64}.S to and the _TIF_SYSCALL_T_OR_A with the thread flags to see if system call tracing is enabled. In the case of 64bit PowerPC, arch_syscall_addr and arch_syscall_match_sym_name are overridden to allow ftrace syscalls to work given the unusual system call table structure and symbol names that start with a period. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
93395feb |
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05-Apr-2011 |
Justin Mattock <justinmattock@gmail.com> |
powerpc: Remove unused config in the Makefile The patch below removes an unused config variable found by using a kernel cleanup script. Note: I did try to cross compile these but hit erros while doing so.. (gcc is not setup to cross compile) and am unsure if anymore needs to be done. Please have a look if/when anybody has free time. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
3cc30d07 |
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11-Apr-2011 |
Michael Ellerman <michael@ozlabs.org> |
powerpc/pci: Move IO workarounds to the common kernel dir Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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76b4eda8 |
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14-Apr-2011 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc: Add A2 cpu support Add the cputable entry, regs and setup & restore entries for the PowerPC A2 core. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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948cf67c |
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24-Jan-2011 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc: Add NAP mode support on Power7 in HV mode Wakeup comes from the system reset handler with a potential loss of the non-hypervisor CPU state. We save the non-volatile state on the stack and a pointer to it in the PACA, which the system reset handler uses to restore things Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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24cc67de |
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20-Jan-2011 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc: Define CPU feature for Architected 2.06 HV mode This bit indicates that we are operating in hypervisor mode on a CPU compliant to architecture 2.06 or later (currently server only). We set it on POWER7 and have a boot-time CPU setup function that clears it if MSR:HV isn't set (booting under a hypervisor). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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698193d8 |
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08-Nov-2010 |
Michael Ellerman <michael@ellerman.id.au> |
powerpc: Consolidate obj-y assignments No need to have three of them. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
d17051cb |
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29-Jul-2010 |
Alexander Graf <agraf@suse.de> |
KVM: PPC: Generic KVM PV guest support We have all the hypervisor pieces in place now, but the guest parts are still missing. This patch implements basic awareness of KVM when running Linux as guest. It doesn't do anything with it yet though. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
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2a342ed5 |
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29-Jul-2010 |
Alexander Graf <agraf@suse.de> |
KVM: PPC: Implement hypervisor interface To communicate with KVM directly we need to plumb some sort of interface between the guest and KVM. Usually those interfaces use hypercalls. This hypercall implementation is described in the last patch of the series in a special documentation file. Please read that for further information. This patch implements stubs to handle KVM PPC hypercalls on the host and guest side alike. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
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4490c06b |
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08-Oct-2010 |
Kumar Gala <galak@kernel.crashing.org> |
powerpc/fsl-booke: Add support for FSL 64-bit e5500 core The new e5500 core is similar to the e500mc core but adds 64-bit support. We support running it in 32-bit mode as it is identical to the e500mc. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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34d97e07 |
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13-Jul-2010 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc/book3e: Add generic 64-bit idle powersave support We use a similar technique to ppc32: We set a thread local flag to indicate that we are about to enter or have entered the stop state, and have fixup code in the async interrupt entry code that reacts to this flag to make us return to a different location (sets NIP to LINK in our case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> -- v2. Fix lockdep bug Re-mask interrupts when coming back from idle
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89c81797 |
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08-Jul-2010 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc/book3e: Hookup doorbells exceptions on 64-bit Book3E Note that critical doorbells are an unimplemented stub just like other critical or machine check handlers, since we haven't done support for "levelled" exceptions yet. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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94c09319 |
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08-Jun-2010 |
Grant Likely <grant.likely@secretlab.ca> |
of: Merge of_device_alloc() and of_device_make_bus_id() This patch merges the common routines of_device_alloc() and of_device_make_bus_id() from powerpc and microblaze. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Grant Likely <grant.likely@secretlab.ca> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au> CC: microblaze-uclinux@itee.uq.edu.au CC: linuxppc-dev@ozlabs.org CC: devicetree-discuss@lists.ozlabs.org
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#
5aae8a53 |
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15-Jun-2010 |
K.Prasad <prasad@linux.vnet.ibm.com> |
powerpc, hw_breakpoints: Implement hw_breakpoints for 64-bit server processors Implement perf-events based hw-breakpoint interfaces for PowerPC 64-bit server (Book III S) processors. This allows access to a given location to be used as an event that can be counted or profiled by the perf_events subsystem. This is done using the DABR (data breakpoint register), which can also be used for process debugging via ptrace. When perf_event hw_breakpoint support is configured in, the perf_event subsystem manages the DABR and arbitrates access to it, and ptrace then creates a perf_event when it is requested to set a data breakpoint. [Adopted suggestions from Paul Mackerras <paulus@samba.org> to - emulate_step() all system-wide breakpoints and single-step only the per-task breakpoints - perform arch-specific cleanup before unregistration through arch_unregister_hw_breakpoint() ] Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
90103f93 |
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17-May-2010 |
Anton Vorontsov <avorontsov@mvista.com> |
powerpc/fsl-booke: Add hibernation support for FSL BookE processors This is started as swsusp_32.S modifications, but the amount of #ifdefs made the whole file horribly unreadable, so let's put the support into its own separate file. The code should be relatively easy to modify to support 44x BookEs as well, but since I don't have any 44x to test, let's confine the code to FSL BookE. (The only FSL-specific part so far is 'flush_dcache_L1'.) Signed-off-by: Anton Vorontsov <avorontsov@mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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a1110654 |
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25-Feb-2010 |
Scott Wood <scottwood@freescale.com> |
powerpc/perf: e500 support This implements perf_event support for the Freescale embedded performance monitor, based on the existing perf_event.c that supports server/classic chips. Some limitations: - Performance monitor interrupts are regular EE interrupts, and thus you can't profile places with interrupts disabled. We may want to implement soft IRQ-disabling, with perfmon interrupts exempted and treated as NMIs. - When trying to schedule multiple event groups at once, and using restricted events, situations could arise where scheduling fails even though it would be possible. Consider three groups, each with two events. One group has restricted events, the others don't. The two non-restricted groups are scheduled, then one is removed, which happens to occupy the two counters that can't do restricted events. The remaining non-restricted group will not be moved to the non-restricted-capable counters to make room if the restricted group tries to be scheduled. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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9d6df3fd |
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25-Feb-2010 |
Scott Wood <scottwood@freescale.com> |
powerpc/perf: Build callchain code regardless of hardware event support. It's also useful for software events, as well as future support for other types of hardware counters. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
3d541c4b |
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24-Sep-2009 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc/chrp: Use the same RTAS daemon as pSeries The CHRP code has some fishy timer based code to scan the RTAS event log, which uses a 1KB stack buffer and doesn't even use the results. The pSeries code as a nicer daemon that allows userspace to read the event log and basically uses the same RTAS interface This patch moves rtasd.c out of platform/pseries and makes it usable by CHRP, after removing the old crufty event log mechanism in there. The nvram logging part of the daemon is still only available on 64-bit since the underlying nvram management routines aren't currently shared. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
188917e1 |
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24-Sep-2009 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc: Move /proc/ppc64 to /proc/powerpc and add symlink Some of the stuff in /proc/ppc64 such as the RTAS bits are actually useful to some 32-bit platforms. Rename the file, and create a symlink on 64-bit for backward compatibility Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
cdd6c482 |
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20-Sep-2009 |
Ingo Molnar <mingo@elte.hu> |
perf: Do the big rename: Performance Counters -> Performance Events Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: Stephane Eranian <eranian@google.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Paul Mackerras <paulus@samba.org> Reviewed-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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#
fbe65447 |
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25-Aug-2009 |
Grant Likely <grant.likely@secretlab.ca> |
powerpc/pci: move pci_64.c device tree scanning code into pci-common.c The PCI device tree scanning code in pci_64.c is some useful functionality. It allows PCI devices to be described in the device tree instead of being probed for, which in turn allows pci devices to use all of the device tree facilities to describe complex PCI bus architectures like GPIO and IRQ routing (perhaps not a common situation for desktop or server systems, but useful for embedded systems with on-board PCI devices). This patch moves the device tree scanning into pci-common.c so it is available for 32-bit powerpc machines too. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
a15098c9 |
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09-Aug-2009 |
Michael Ellerman <michael@ellerman.id.au> |
powerpc: Enable GCOV Make it possible to enable GCOV code coverage measurement on powerpc. Lightly tested on 64-bit, seems to work as expected. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
2d27cfd3 |
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23-Jul-2009 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc: Remaining 64-bit Book3E support This contains all the bits that didn't fit in previous patches :-) This includes the actual exception handlers assembly, the changes to the kernel entry, other misc bits and wiring it all up in Kconfig. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
20002ded |
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17-Aug-2009 |
Paul Mackerras <paulus@samba.org> |
perf_counter: powerpc: Add callchain support This adds support for tracing callchains for powerpc, both 32-bit and 64-bit, and both in the kernel and userspace, from PMU interrupt context. The first three entries stored for each callchain are the NIP (next instruction pointer), LR (link register), and the contents of the LR save area in the second stack frame (the first is ignored because the ABI convention on powerpc is that functions save their return address in their caller's stack frame). Because leaf functions don't have to save their return address (LR value) and don't have to establish a stack frame, it's possible for either or both of LR and the second stack frame's LR save area to have valid return addresses in them. This is basically impossible to disambiguate without either reading the code or looking at auxiliary information such as CFI tables. Since we don't want to do either of those things at interrupt time, we store both LR and the second stack frame's LR save area. Once we get past the second stack frame, there is no ambiguity; all return addresses we get are reliable. For kernel traces, we check whether they are valid kernel instruction addresses and store zero instead if they are not (rather than omitting them, which would make it impossible for userspace to know which was which). We also store zero instead of the second stack frame's LR save area value if it is the same as LR. For kernel traces, we check for interrupt frames, and for user traces, we check for signal frames. In each case, since we're starting a new trace, we store a PERF_CONTEXT_KERNEL/USER marker so that userspace knows that the next three entries are NIP, LR and the second stack frame for the interrupted context. We read user memory with __get_user_inatomic. On 64-bit, if this PMU interrupt occurred while interrupts are soft-disabled, and there is no MMU hash table entry for the page, we will get an -EFAULT return from __get_user_inatomic even if there is a valid Linux PTE for the page, since hash_page isn't reentrant. Thus we have code here to read the Linux PTE and access the page via the kernel linear mapping. Since 64-bit doesn't use (or need) highmem there is no need to do kmap_atomic. On 32-bit, we don't do soft interrupt disabling, so this complication doesn't occur and there is no need to fall back to reading the Linux PTE, since hash_page (or the TLB miss handler) will get called automatically if necessary. Note that we cannot get PMU interrupts in the interval during context switch between switch_mm (which switches the user address space) and switch_to (which actually changes current to the new process). On 64-bit this is because interrupts are hard-disabled in switch_mm and stay hard-disabled until they are soft-enabled later, after switch_to has returned. So there is no possibility of trying to do a user stack trace when the user address space is not current's address space. Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
7325927e |
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17-Jun-2009 |
Paul Mackerras <paulus@samba.org> |
perf_counter: powerpc: Add processor back-end for MPC7450 family This adds support for the performance monitor hardware on the MPC7450 family of processors (7450, 7451, 7455, 7447/7457, 7447A, 7448), used in the later Apple G4 powermacs/powerbooks and other machines. These machines have 6 hardware counters with a unique set of events which can be counted on each counter, with some events being available on multiple counters. Raw event codes for these processors are (PMC << 8) + PMCSEL. If PMC is non-zero then the event is that selected by the given PMCSEL value for that PMC (hardware counter). If PMC is zero then the event selected is one of the low-numbered ones that are common to several PMCs. In this case PMCSEL must be <= 22 and the event is what that PMCSEL value would select on PMC1 (but it may be placed any other PMC that has the same event for that PMCSEL value). For events that count cycles or occurrences that exceed a threshold, the threshold requested can be specified in the 0x3f000 bits of the raw event codes. If the event uses the threshold multiplier bit and that bit should be set, that is indicated with the 0x40000 bit of the raw event code. This fills in some of the generic cache events. Unfortunately there are quite a few blank spaces in the table, partly because these processors tend to count cache hits rather than cache accesses. Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: linuxppc-dev@ozlabs.org Cc: benh@kernel.crashing.org LKML-Reference: <19000.55631.802122.696927@cargo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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#
105988c0 |
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17-Jun-2009 |
Paul Mackerras <paulus@samba.org> |
perf_counter: powerpc: Enable use of software counters on 32-bit powerpc This enables the perf_counter subsystem on 32-bit powerpc. Since we don't have any support for hardware counters on 32-bit powerpc yet, only software counters can be used. Besides selecting HAVE_PERF_COUNTERS for 32-bit powerpc as well as 64-bit, the main thing this does is add an implementation of set_perf_counter_pending(). This needs to arrange for perf_counter_do_pending() to be called when interrupts are enabled. Rather than add code to local_irq_restore as 64-bit does, the 32-bit set_perf_counter_pending() generates an interrupt by setting the decrementer to 1 so that a decrementer interrupt will become pending in 1 or 2 timebase ticks (if a decrementer interrupt isn't already pending). When interrupts are enabled, timer_interrupt() will be called, and some new code in there calls perf_counter_do_pending(). We use a per-cpu array of flags to indicate whether we need to call perf_counter_do_pending() or not. This introduces a couple of new Kconfig symbols: PPC_HAVE_PMU_SUPPORT, which is selected by processor families for which we have hardware PMU support (currently only PPC64), and PPC_PERF_CTRS, which enables the powerpc-specific perf_counter back-end. Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: linuxppc-dev@ozlabs.org Cc: benh@kernel.crashing.org LKML-Reference: <19000.55404.103840.393470@cargo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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#
ba55bd74 |
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09-Jun-2009 |
Michael Ellerman <michael@ellerman.id.au> |
powerpc: Add configurable -Werror for arch/powerpc Add the option to build the code under arch/powerpc with -Werror. The intention is to make it harder for people to inadvertantly introduce warnings in the arch/powerpc code. It needs to be configurable so that if a warning is introduced, people can easily work around it while it's being fixed. The option is a negative, ie. don't enable -Werror, so that it will be turned on for allyes and allmodconfig builds. The default is n, in the hope that developers will build with -Werror, that will probably lead to some build breaks, I am prepared to be flamed. It's not enabled for math-emu, which is a steaming pile of warnings. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
7719ed7c |
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10-Jun-2009 |
Michael Ellerman <michael@ellerman.id.au> |
powerpc: Only build prom_init.o when CONFIG_PPC_OF_BOOT_TRAMPOLINE=y Commit 28794d34 ("powerpc/kconfig: Kill PPC_MULTIPLATFORM"), added CONFIG_PPC_OF_BOOT_TRAMPOLINE to control the buliding of prom_init.o However the Makefile still unconditionally builds prom_init_check, the script that checks prom_init.o for symbol usage, and so in turn prom_init.o is still always being built. (it's not linked though) So surround all the prom_init_check logic with an ifeq block testing if CONFIG_PPC_OF_BOOT_TRAMPOLINE is set. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
4da52960 |
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10-Jun-2009 |
Paul Mackerras <paulus@samba.org> |
perf_counters: powerpc: Add support for POWER7 processors This adds the back-end for the PMU on POWER7 processors. POWER7 has 4 fully-programmable counters and two fixed-function counters (which do respect the freeze conditions, can generate interrupts, and are writable, unlike PMC5/6 on POWER5+/6). Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <18992.36329.189378.17992@drongo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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#
ec3cf2ec |
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13-May-2009 |
Becky Bruce <beckyb@kernel.crashing.org> |
powerpc: Add support for swiotlb on 32-bit This patch includes the basic infrastructure to use swiotlb bounce buffering on 32-bit powerpc. It is not yet enabled on any platforms. Probably the most interesting bit is the addition of addr_needs_map to dma_ops - we need this as a dma_op because the decision of whether or not an addr can be mapped by a device is device-specific. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
e821ea70 |
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02-Jun-2009 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc: Move VMX and VSX asm code to vector.S Currently, load_up_altivec and give_up_altivec are duplicated in 32-bit and 64-bit. This creates a common implementation that is moved away from head_32.S, head_64.S and misc_64.S and into vector.S, using the same macros we already use for our common implementation of load_up_fpu. I also moved the VSX code over to vector.S though in that case I didn't make it build on 32-bit (yet). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
28794d34 |
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10-Mar-2009 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc/kconfig: Kill PPC_MULTIPLATFORM CONFIG_PPC_MULTIPLATFORM is a remain of the pre-powerpc days and isn't really meaningful anymore. It was basically equivalent to PPC64 || 6xx. This removes it along with the following changes: - 32-bit platforms that relied on PPC32 && PPC_MULTIPLATFORM now rely on 6xx which is what they want anyway. - A new symbol, PPC_BOOK3S, is defined that represent compliance with the "Server" variant of the architecture. This is set when either 6xx or PPC64 is set and open the door for future BOOK3E 64-bit. - 64-bit platforms that relied on PPC64 && PPC_MULTIPLATFORM now use PPC64 && PPC_BOOK3S - A separate and selectable CONFIG_PPC_OF_BOOT_TRAMPOLINE option is now used to control the use of prom_init.c Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
880860e3 |
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05-Mar-2009 |
Paul Mackerras <paulus@samba.org> |
perfcounters/powerpc: add support for POWER4 processors Impact: more hardware support This adds the back-end for the PMU on the POWER4 and POWER4+ processors (GP and GQ). This is quite similar to the PPC970, with 8 PMCs, but has fewer events than the PPC970. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
aabbaa60 |
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05-Mar-2009 |
Paul Mackerras <paulus@samba.org> |
perfcounters/powerpc: add support for POWER5+ processors Impact: more hardware support This adds the back-end for the PMU on the POWER5+ processors (i.e. GS, including GS DD3 aka POWER5++). This doesn't use the fixed-function PMC5 and PMC6 since they don't respect the freeze conditions and don't generate interrupts, as on POWER6. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
742bd95b |
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23-Feb-2009 |
Paul Mackerras <paulus@samba.org> |
perfcounters/powerpc: Add support for POWER5 processors This adds the back-end for the PMU on the POWER5 processor. This knows how to use the fixed-function PMC5 and PMC6 (instructions completed and run cycles). Unlike POWER6, PMC5/6 obey the freeze conditions and can generate interrupts, so their use doesn't impose any extra restrictions. POWER5+ is different and is not supported by this patch. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
620165f9 |
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12-Feb-2009 |
Kumar Gala <galak@kernel.crashing.org> |
powerpc: Add support for using doorbells for SMP IPI The e500mc supports the new msgsnd/doorbell mechanisms that were added in the Power ISA 2.05 architecture. We use the normal level doorbell for doing SMP IPIs at this point. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
6794c782 |
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09-Feb-2009 |
Steven Rostedt <srostedt@redhat.com> |
powerpc64: port of the function graph tracer This is a port of the function graph tracer that was written by Frederic Weisbecker for the x86. This only works for PPC64 at the moment and only for static tracing. PPC32 and dynamic function graph tracing support will come later. The trace produces a visual calling of functions: # tracer: function_graph # # CPU DURATION FUNCTION CALLS # | | | | | | | 0) 2.224 us | } 0) ! 271.024 us | } 0) ! 320.080 us | } 0) ! 324.656 us | } 0) ! 329.136 us | } 0) | .put_prev_task_fair() { 0) | .update_curr() { 0) 2.240 us | .update_min_vruntime(); 0) 6.512 us | } 0) 2.528 us | .__enqueue_entity(); 0) + 15.536 us | } 0) | .pick_next_task_fair() { 0) 2.032 us | .__pick_next_entity(); 0) 2.064 us | .__clear_buddies(); 0) | .set_next_entity() { 0) 2.672 us | .__dequeue_entity(); 0) 6.864 us | } Geoff Lavand tested on PS3. Tested-by: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
105c31df |
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08-Jan-2009 |
Kumar Gala <galak@kernel.crashing.org> |
powerpc/fsl-booke: Cleanup init/exception setup to be runtime We currently have a few variants of fsl-booke processors (e500v1, e500v2, e500mc, and e200). They all have minor differences that we had previously been handling via ifdefs. To move towards having this support the following changes have been made: * PID1, PID2 only exist on e500v1 & e500v2 and should not be accessed on e500mc or e200. We use MMUCFG[NPIDS] to determine which case we are since we only touch PID1/2 in extremely early init code. * Not all IVORs exist on all the processors so introduce cpu_setup functions for each variant to setup the proper IVORs that are either unique or exist but have some variations between the processors Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
f7862837 |
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09-Jan-2009 |
Paul Mackerras <paulus@samba.org> |
powerpc/perf_counter: Add support for POWER6 This adds the back-end for the PMU on the POWER6 processor. Fortunately, the event selection hardware is somewhat simpler on POWER6 than on other POWER family processors, so the constraints fit into only 32 bits. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
16b06799 |
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09-Jan-2009 |
Paul Mackerras <paulus@samba.org> |
powerpc/perf_counter: Add support for PPC970 family This adds the back-end for the PMU on the PPC970 family. The PPC970 allows events from the ISU to be selected in two different ways. Rather than use alternative event codes to express this, we instead use a single encoding for ISU events and express the resulting constraint (that you can't select events from all three of FPU/IFU/VPU, ISU and IDU/STS at the same time, since they all come in through only 2 multiplexers) using a NAND constraint field, and work out which multiplexer is used for ISU events at compute_mmcr time. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
4574910e |
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09-Jan-2009 |
Paul Mackerras <paulus@samba.org> |
powerpc/perf_counter: Add generic support for POWER-family PMU hardware This provides the architecture-specific functions needed to access PMU hardware on the 64-bit PowerPC processors. It has been designed for the IBM POWER family (POWER 4/4+/5/5+/6 and PPC970) but will hopefully also suit other 64-bit PowerPC machines (although probably not Cell given how different it is in this area). This doesn't include back-ends for any specific processors. This implements a system which allows back-ends to express the constraints that their hardware has on what events can be counted simultaneously. The constraints are expressed as a 64-bit mask + 64-bit value for each event, and the encoding is capable of expressing the constraints arising from having a set of multiplexers feeding an event bus, with some events being available through multiple multiplexer settings, such as we get on POWER4 and PPC970. Furthermore, the back-end can supply alternative event codes for each event, and the constraint checking code will try all possible combinations of alternative event codes to try to find a combination that will fit. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
93197a36 |
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23-Dec-2008 |
Nathan Lynch <ntl@pobox.com> |
powerpc: Rewrite sysfs processor cache info code The current code for providing processor cache information in sysfs has the following deficiencies: - several complex functions that are hard to understand - implicit recursion (cache_desc_release -> kobject_put -> cache_desc_release) - explicit recursion (create_cache_index_info) - use of two per-cpu arrays when one would suffice - duplication of work on systems where CPUs share cache Also, when I looked at implementing support for a shared_cpu_map attribute, it was pretty much impossible to handle hotplug without checking every single online CPU's cache_desc list and fixing things up... not that this is a hot path, but it would have introduced O(n^2)-ish behavior during boot. Addressing this involved rethinking the core data structures used, which didn't lend itself to an incremental approach. This implementation maintains a "forest" (potentially more than one tree) of cache objects which reflects the system's cache topology. Cache objects are instantiated as needed as CPUs come online. A per-cpu array is used mainly for sysfs-related bookkeeping; the objects in the array just point to the appropriate points in the forest. This maintains compatibility with the existing code and includes some enhancements: - Implement the shared_cpu_map attribute, which is essential for enabling userspace to discover the system's overall cache topology. - Use cache-block-size properties if cache-line-size is not available. I chose to place this implementation in a new file since it would have roughly doubled the size of sysfs.c, which is already kind of messy. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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#
73753313 |
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17-Dec-2008 |
Anton Vorontsov <avorontsov@ru.mvista.com> |
powerpc/32/kdump: Implement crash_setup_regs() using ppc_save_regs() This replaces the dummy crash_setup_regs function with full-fledged crash_setup_regs implementation. On PPC32 we simply use the new ppc_save_regs function to dump the registers. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
322b4394 |
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17-Dec-2008 |
Anton Vorontsov <avorontsov@ru.mvista.com> |
powerpc: Prepare xmon_save_regs for use with kdump Today the arch/powerpc/xmon/setjmp.S file contains only the xmon_save_regs function. We want to use it for kdump purposes, so let's move the file into arch/powerpc/kernel/ and give the function a more generic name (ppc_save_regs). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
f1eecf0e |
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26-Nov-2008 |
Steven Rostedt <srotedt@redhat.com> |
powerpc/ppc32: static ftrace fixes for PPC32 Impact: fix for PowerPC 32 code There were some early init code that was not safe for static ftrace to boot on my PowerBook. This code must only use relative addressing, and static mcount performs a compare of the ftrace_trace_function pointer, and gets that with an absolute address. In the early init boot up code, this will cause a fault. This patch removes tracing from the files containing the offending functions. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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#
606576ce |
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06-Oct-2008 |
Steven Rostedt <rostedt@goodmis.org> |
ftrace: rename FTRACE to FUNCTION_TRACER Due to confusion between the ftrace infrastructure and the gcc profiling tracer "ftrace", this patch renames the config options from FTRACE to FUNCTION_TRACER. The other two names that are offspring from FTRACE DYNAMIC_FTRACE and FTRACE_MCOUNT_RECORD will stay the same. This patch was generated mostly by script, and partially by hand. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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#
4fc665b8 |
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12-Sep-2008 |
Becky Bruce <becky.bruce@freescale.com> |
powerpc: Merge 32 and 64-bit dma code We essentially adopt the 64-bit dma code, with some changes to support 32-bit systems, including HIGHMEM. dma functions on 32-bit are now invoked via accessor functions which call the correct op for a device based on archdata dma_ops. If there is no archdata dma_ops, this defaults to dma_direct_ops. In addition, the dma_map/unmap_page functions are added to dma_ops because we can't just fall back on map/unmap_single when HIGHMEM is enabled. In the case of dma_direct_*, we stop using map/unmap_single and just use the page version - this saves a lot of ugly ifdeffing. We leave map/unmap_single in the dma_ops definition, though, because they are needed by the iommu code, which does not implement map/unmap_page. Ideally, going forward, we will completely eliminate map/unmap_single and just have map/unmap_page, if it's workable for 64-bit. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
8dd0e952 |
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08-Sep-2008 |
Becky Bruce <becky.bruce@freescale.com> |
powerpc: Move iommu dma ops from dma.c to dma-iommu.c 32-bit platforms are about to start using dma.c; move the iommu dma ops into their own file to make this a bit cleaner. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
7c05d7e0 |
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08-Sep-2008 |
Becky Bruce <becky.bruce@freescale.com> |
powerpc: Rename dma_64.c to dma.c This is in preparation for the merge of the 32 and 64-bit dma code in arch/powerpc. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
549e8152 |
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29-Aug-2008 |
Paul Mackerras <paulus@samba.org> |
powerpc: Make the 64-bit kernel as a position-independent executable This implements CONFIG_RELOCATABLE for 64-bit by making the kernel as a position-independent executable (PIE) when it is set. This involves processing the dynamic relocations in the image in the early stages of booting, even if the kernel is being run at the address it is linked at, since the linker does not necessarily fill in words in the image for which there are dynamic relocations. (In fact the linker does fill in such words for 64-bit executables, though not for 32-bit executables, so in principle we could avoid calling relocate() entirely when we're running a 64-bit kernel at the linked address.) The dynamic relocations are processed by a new function relocate(addr), where the addr parameter is the virtual address where the image will be run. In fact we call it twice; once before calling prom_init, and again when starting the main kernel. This means that reloc_offset() returns 0 in prom_init (since it has been relocated to the address it is running at), which necessitated a few adjustments. This also changes __va and __pa to use an equivalent definition that is simpler. With the relocatable kernel, PAGE_OFFSET and MEMORY_START are constants (for 64-bit) whereas PHYSICAL_START is a variable (and KERNELBASE ideally should be too, but isn't yet). With this, relocatable kernels still copy themselves down to physical address 0 and run there. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
7563dc64 |
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02-Sep-2008 |
Tony Breeds <tony@bakeyournoodle.com> |
powerpc: Work around gcc's -fno-omit-frame-pointer bug This bug is causing random crashes (http://bugzilla.kernel.org/show_bug.cgi?id=11414). -fno-omit-frame-pointer is only needed on powerpc when -pg is also supplied, and there is a gcc bug that causes incorrect code generation on 32-bit powerpc when -fno-omit-frame-pointer is used---it uses stack locations below the stack pointer, which is not allowed by the ABI because those locations can and sometimes do get corrupted by an interrupt. This ensures that CONFIG_FRAME_POINTER is only selected by ftrace. When CONFIG_FTRACE is enabled we also pass -mno-sched-epilog to work around the gcc codegen bug. Patch based on work by: Andreas Schwab <schwab@suse.de> Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
b950bdd0 |
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17-Aug-2008 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
powerpc: Expose PMCs & cache topology in sysfs on 32-bit The file arch/powerpc/kernel/sysfs.c is currently only compiled for 64-bit kernels. It contain code to register CPU sysdevs in sysfs and add various properties such as cache topology and raw access by root to performance monitor counters (PMCs). A lot of that can be re-used as is on 32-bits. This makes the file be built for both, with appropriate ifdef'ing for the few bits that are really 64-bit specific, and adds some support for the raw PMCs for 75x and 74xx processors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
9c4cb825 |
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01-Aug-2008 |
Kumar Gala <galak@kernel.crashing.org> |
powerpc: Remove use of CONFIG_PPC_MERGE Now that arch/ppc is gone and CONFIG_PPC_MERGE is always set, remove the dead code associated with !CONFIG_PPC_MERGE from arch/powerpc and include/asm-powerpc. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
17ce452f |
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23-Jul-2008 |
Jason Wessel <jason.wessel@windriver.com> |
kgdb, powerpc: arch specific powerpc kgdb support This patch removes the old kgdb reminants from ARCH=powerpc and implements the new style arch specific stub for the common kgdb core interface. It is possible to have xmon and kgdb in the same kernel, but you cannot use both at the same time because there is only one set of debug hooks. The arch specific kgdb implementation saves the previous state of the debug hooks and restores them if you unconfigure the kgdb I/O driver. Kgdb should have no impact on a kernel that has no kgdb I/O driver configured. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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#
f0c426bc |
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20-Jun-2008 |
Kumar Gala <galak@kernel.crashing.org> |
powerpc: Move common module code into its own file Refactor common code between ppc32 and ppc64 module handling into a shared filed. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
fc4033b2 |
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18-Jun-2008 |
Kumar Gala <galak@kernel.crashing.org> |
powerpc/85xx: add DOZE/NAP support for e500 core The e500 core enter DOZE/NAP power-saving modes when the core go to cpu_idle routine. The power management default running mode is DOZE, If the user echo 1 > /proc/sys/kernel/powersave-nap the system will change to NAP running mode. Signed-off-by: Dave Liu <daveliu@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
4e491d14 |
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14-May-2008 |
Steven Rostedt <rostedt@goodmis.org> |
ftrace: support for PowerPC This patch adds full support for ftrace for PowerPC (both 64 and 32 bit). This includes dynamic tracing and function filtering. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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#
6a8b2308 |
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06-May-2008 |
Segher Boessenkool <segher@kernel.crashing.org> |
[POWERPC] ppc: Don't run prom_init_check for arch/ppc builds arch/ppc doesn't have prom_init.o (anymore). Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
cc2bb696 |
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18-Apr-2008 |
Zhang Wei <wei.zhang@freescale.com> |
[RAPIDIO] Add OF-tree support to RapidIO controller driver This initializes the RapidIO controller driver using addresses and interrupt numbers obtained from the firmware device tree, rather than using hardcoded constants. Signed-off-by: Zhang Wei <wei.zhang@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
5c02cd2f |
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23-Apr-2008 |
Michael Ellerman <michael@ellerman.id.au> |
[POWERPC] Discourage people from fiddling with kernel data from prom_init As BenH said the other day, it is an "accident" that prom_init.o is linked with the rest of the kernel. The truth is a little more subtle, prom_init isn't truly bootloader, it does access kernel data in a few places. What we can do is discourage people from adding new code that accesses data outside of prom_init. And hence this patch; from the script: # This script checks prom_init.o to see what external symbols it # is using, if it finds symbols not in the whitelist it returns # an error. The point of this is to discourage people from # intentionally or accidentally adding new code to prom_init.c # which has side effects on other parts of the kernel. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
fd3e0bbc |
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16-Apr-2008 |
Christoph Hellwig <hch@lst.de> |
[POWERPC] Stacktrace support for lockdep This adds stacktrace support for powerpc, which will be needed for lockdep. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
64ac24e7 |
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07-Mar-2008 |
Matthew Wilcox <willy@infradead.org> |
Generic semaphore implementation Semaphores are no longer performance-critical, so a generic C implementation is better for maintainability, debuggability and extensibility. Thanks to Peter Zijlstra for fixing the lockdep warning. Thanks to Harvey Harrison for pointing out that the unlikely() was unnecessary. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu>
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#
e4ccde02 |
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11-Feb-2008 |
Kumar Gala <galak@kernel.crashing.org> |
[POWERPC] Remove generated files on make clean vmlinux.lds and dtc-parser.tab.h get created but never cleaned up. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
01e31dba |
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02-Jan-2008 |
Roland McGrath <roland@redhat.com> |
[POWERPC] Switch to generic compat_binfmt_elf code This switches the CONFIG_PPC64 support for 32-bit ELF to use the generic fs/compat_binfmt_elf.c implementation instead of our own binfmt_elf32.c. Since so much is the same between 32/64, there is only one macro we have to define to make the generic support work out of the box. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
80fdf470 |
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20-Dec-2007 |
Roland McGrath <roland@redhat.com> |
[POWERPC] Add user_regset_view definitions This provides the task_user_regset_view entry point and support for all the native-mode (64 on CONFIG_PPC64, 32 on CONFIG_PPC32) thread register state. This will enable generic machine-independent code to access user-mode threads' registers for debugging and dumping. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
de3c8d41 |
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23-Jan-2008 |
Kumar Gala <galak@kernel.crashing.org> |
[POWERPC] Move RapidIO support code from arch/ppc Do just enough to move the RapidIO support code for 85xx over from arch/ppc into arch/powerpc and make it still build. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
0a4690cf |
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06-Jan-2008 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] Check that the syscall table matches the syscall numbers Also check that __NR_syscalls has been updated appropriately. Hopefully this will catch any out of order additions to the table in the future. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
08a644ec |
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06-Nov-2007 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] Stop the TOC overflowing for large builds We were using -mno-minimal-toc on everything in arch/powerpc/kernel, which means that all the functions in there were putting all their TOC entries in the top-level TOC, and it was overflowing on an allyesconfig build. For various reasons, prom_init.c does need -mno-minimal-toc, but the other .c files in there can use sub-TOCs quite happily. This change is sufficient for now to stop the TOC overflowing; other directories under arch/powerpc also use -mno-minimal-toc and could also be changed later if necessary. Lmbench runs with and without this patch showed no significant speed differences. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
5dd57a13 |
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18-Sep-2007 |
Scott Wood <scottwood@freescale.com> |
[POWERPC] 8xx: Move softemu8xx.c from arch/ppc Previously, Soft_emulate_8xx was called with no implementation, resulting in build failures whenever building 8xx without math emulation. The implementation is copied from arch/ppc to resolve this issue. However, this sort of minimal emulation is not a very good idea other than for compatibility with existing userspaces, as it's less efficient than soft-float and can mislead users into believing they have soft-float. Thus, it is made a configurable option, off by default. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
26f571d7 |
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03-Oct-2007 |
Paul Mackerras <paulus@samba.org> |
[PPC] Use cpu setup routines from cpu_setup_44x.S for ARCH=ppc Commit 8112753bb2c0045398c89d0647792b39805f6d40 made 44x in ARCH=powerpc builds use cpu setup routines in cpu_setup_44x.S, but didn't make a similar change for ARCH=ppc, and consequently the ARCH=ppc builds fail with undefined symbols (since both use the same cputable.c). This fixes it by including cpu_setup_44x.S in the ARCH=ppc builds, and by taking out the now-redundant FPU initialization in arch/ppc/kernel/head_44x.S. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
84e3ad5b |
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21-Sep-2007 |
Valentine Barshak <vbarshak@ru.mvista.com> |
[POWERPC] 4xx: Introduce cpu_setup functionality to 44x platform This adds cpu_setup functionality for ppc44x platform. Low level cpu-spefic initialization routines should be placed in cpu_setup_44x.S and a callback should be added to cputable. The cpu_setup is invoked by identify_cpu() function at early init. Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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#
2578bfae |
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20-Sep-2007 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] Create and use CONFIG_WORD_SIZE Linus made this suggestion for the x86 merge and this starts the process for powerpc. We assume that CONFIG_PPC64 implies CONFIG_PPC_MERGE and CONFIG_PPC_STD_MMU_32 implies CONFIG_PPC_STD_MMU. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
6f668280 |
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20-Sep-2007 |
Domen Puncer <domen.puncer@telargo.com> |
[POWERPC] clk.h interface for platforms This provides an implementation of the <linux/clk.h> interface for arch/powerpc using a set of function pointers in clk_functions. Platforms that want to support this interface should fill clk_functions and select CONFIG_PPC_CLOCK in Kconfig. Signed-off-by: Domen Puncer <domen.puncer@telargo.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
16a15a30 |
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19-Aug-2007 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] iSeries: Clean up lparmap mess We need to have xLparMap in head_64.S so that it is at a fixed address (because the linker will not resolve (address & 0xffffffff) for us). But the assembler miscalculates the KERNEL_VSID() expressions. So put the confusing expressions into asm-offsets.c. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
15f6527e |
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20-Aug-2007 |
Josh Boyer <jwboyer@linux.vnet.ibm.com> |
[POWERPC] Rename 4xx paths to 40x 4xx is a bit of a misnomer for certain things, as they really apply to PowerPC 40x only. Rename some of the files to clean this up. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Acked-by: David Gibson <david@gibson.dropbear.id.au>
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#
55a910a8 |
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10-Aug-2007 |
Roland McGrath <roland@redhat.com> |
[POWERPC] Fix for assembler -g ppc64 does the unusual thing of using #include on a compiler-generated assembly file (lparmap.s) from an assembly source file (head_64.S). This runs afoul of my recent patch to pass -gdwarf2 to the assembler under CONFIG_DEBUG_INFO. This patch avoids the problem by disabling DWARF generation (-g0) when producing lparmap.s. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
b0cb1a19 |
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29-Jul-2007 |
Rafael J. Wysocki <rjw@rjwysocki.net> |
Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION to avoid confusion (among other things, with CONFIG_SUSPEND introduced in the next patch). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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#
5516b540 |
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27-Jun-2007 |
Kumar Gala <galak@kernel.crashing.org> |
[POWERPC] Use global_number in ppc32 pci_controller Make the pci_controller struct use global_number for the PHB domain number instead of index to match what ppc64 does and reuse its pci_domain_nr code. Introduced a pci-common.c to handle shared code between ppc32 & ppc64. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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#
22e38f29 |
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03-Jun-2007 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[POWERPC] Make syscall restart code more common This patch moves the code in signal_32.c and signal_64.c for handling syscall restart into a common signal.c file and converge around a single implementation that is based on the 32 bits one, using trap, ccr and r3 rather than the special "result" field for deciding what to do. The "result" field is now pretty much deprecated. We still set it for the sake of whatever might rely on it in userland but we no longer use it's content. This, along with a previous patch that enables ptracers to write to "trap" and "orig_r3" should allow gdb to properly handle syscall restarting. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
3d5134ee |
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03-Jun-2007 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[POWERPC] Rewrite IO allocation & mapping on powerpc64 This rewrites pretty much from scratch the handling of MMIO and PIO space allocations on powerpc64. The main goals are: - Get rid of imalloc and use more common code where possible - Simplify the current mess so that PIO space is allocated and mapped in a single place for PCI bridges - Handle allocation constraints of PIO for all bridges including hot plugged ones within the 2GB space reserved for IO ports, so that devices on hotplugged busses will now work with drivers that assume IO ports fit in an int. - Cleanup and separate tracking of the ISA space in the reserved low 64K of IO space. No ISA -> Nothing mapped there. I booted a cell blade with IDE on PIO and MMIO and a dual G5 so far, that's it :-) With this patch, all allocations are done using the code in mm/vmalloc.c, though we use the low level __get_vm_area with explicit start/stop constraints in order to manage separate areas for vmalloc/vmap, ioremap, and PCI IOs. This greatly simplifies a lot of things, as you can see in the diffstat of that patch :-) A new pair of functions pcibios_map/unmap_io_space() now replace all of the previous code that used to manipulate PCI IOs space. The allocation is done at mapping time, which is now called from scan_phb's, just before the devices are probed (instead of after, which is by itself a bug fix). The only other caller is the PCI hotplug code for hot adding PCI-PCI bridges (slots). imalloc is gone, as is the "sub-allocation" thing, but I do beleive that hotplug should still work in the sense that the space allocation is always done by the PHB, but if you unmap a child bus of this PHB (which seems to be possible), then the code should properly tear down all the HPTE mappings for that area of the PHB allocated IO space. I now always reserve the first 64K of IO space for the bridge with the ISA bus on it. I have moved the code for tracking ISA in a separate file which should also make it smarter if we ever are capable of hot unplugging or re-plugging an ISA bridge. This should have a side effect on platforms like powermac where VGA IOs will no longer work. This is done on purpose though as they would have worked semi-randomly before. The idea at this point is to isolate drivers that might need to access those and fix them by providing a proper function to obtain an offset to the legacy IOs of a given bus. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
df87ef55 |
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07-May-2007 |
Michael Ellerman <michael@ellerman.id.au> |
[POWERPC] PowerPC MSI infrastructure This provides the architecture specific hooks to support MSI on powerpc. We implement the newly added arch_setup_msi_irqs() and arch_teardown_msi_irqs(), and then delegate to ppc_md routines. Platforms that don't implement MSI will leave the ppc_md calls blank, arch_msi_check_device() will detect this and return ENOSYS. Drivers should detect this error and continue to use LSI. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
543b9fd3 |
|
03-May-2007 |
Johannes Berg <johannes@sipsolutions.net> |
[POWERPC] powermac: Suspend to disk on G5 Powermac G5 suspend to disk implementation. The code is platform agnostic but only tested on powermac, no other 64-bit powerpc machines. Because nvidiafb still breaks suspend I have marked it EXPERIMENTAL on powermac and because I can't test it and some lowlevel code will need changes it is BROKEN on all other 64-bit platforms. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
49c3df6a |
|
02-May-2007 |
Vivek Goyal <vgoyal@in.ibm.com> |
[PATCH] x86: Move swsusp __pa() dependent code to arch portion o __pa() should be used only on kernel linearly mapped virtual addresses and not on kernel text and data addresses. o Hibernation code needs to determine the physical address associated with kernel symbol to mark a section boundary which contains pages which don't have to be saved and restored during hibernate/resume operation. o Move this piece of code in arch dependent section. So that architectures which don't have kernel text/data mapped into kernel linearly mapped region can come up with their own ways of determining physical addresses associated with a kernel text. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de>
|
#
be9c94dd |
|
30-Apr-2007 |
Johannes Berg <johannes@sipsolutions.net> |
[POWERPC] Fix suspend states again In commit 0fba3a1f39f8b0a50b56c8b068fa52131cbc84c2 (a very long time ago, May 2006), I fixed a bug that caused powermacs to crash when you tried entering standby/mem suspend states. As I'm now getting more familiar with the suspend code I notice a few more things: 1. we previously misunderstood what pm_ops is for, it isn't supposed to be for doing platform dependent suspend/resume stuff that needs to be done for suspend to disk (as we currently try to use it!), it is instead for entering platform dependent suspend states ("standby", "mem"). 2. due to the first point, we never properly save FPU and altivec states when suspending to disk. It probably hasn't hurt yet because the process that writes the "disk" to /sys/power/state uses neither and its context is used. This patch addresses these points as follows: 1. remove all pm_ops from powermac, powermac suspend to ram isn't currently usable via /sys/power/state but is done via the PMU instead. 2. move the code responsible for storing FPU/altivec state into save_processor_state and the set_context() call to restore_processor_state. 3. add a call to kernel_enable_spe() It may look like there is some code removal missing but that is actually because the new suspend.h file overrides the ppc/suspend.h one which was previously used. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
bed59275 |
|
03-Mar-2007 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] Allow pSeries to build without CONFIG_PCI Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
|
#
1199919b |
|
04-Feb-2007 |
Olof Johansson <olof@lixom.net> |
[POWERPC] pasemi: Idle loops Powersave support on PA6T. Right now it only uses 'doze' mode, and will default to no savings (spin). Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
|
#
f09b5ce0 |
|
07-Dec-2006 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] iSeries: head_64.o needs to depend on lparmap.s This dependency was inadvertantly removed in a previous patch (e73aedba562d1e7777287043afb8e46131ed402e). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
e73aedba |
|
29-Nov-2006 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] iSeries: don't build head_64.o unnecessarily Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
68a64357 |
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12-Nov-2006 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[POWERPC] Merge 32 and 64 bits asm-powerpc/io.h powerpc: Merge 32 and 64 bits asm-powerpc/io.h The rework on io.h done for the new hookable accessors made it easier, so I just finished the work and merged 32 and 64 bits io.h for arch/powerpc. arch/ppc still uses the old version in asm-ppc, there is just too much gunk in there that I really can't be bothered trying to cleanup. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
4cb3cee0 |
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10-Nov-2006 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[POWERPC] Allow hooking of PCI MMIO & PIO accessors on 64 bits This patch reworks the way iSeries hooks on PCI IO operations (both MMIO and PIO) and provides a generic way for other platforms to do so (we have need to do that for various other platforms). While reworking the IO ops, I ended up doing some spring cleaning in io.h and eeh.h which I might want to split into 2 or 3 patches (among others, eeh.h had a lot of useless stuff in it). A side effect is that EEH for PIO should work now (it used to pass IO ports down to the eeh address check functions which is bogus). Also, new are MMIO "repeat" ops, which other archs like ARM already had, and that we have too now: readsb, readsw, readsl, writesb, writesw, writesl. In the long run, I might also make EEH use the hooks instead of wrapping at the toplevel, which would make things even cleaner and relegate EEH completely in platforms/iseries, but we have to measure the performance impact there (though it's really only on MMIO reads) Since I also need to hook on ioremap, I shuffled the functions a bit there. I introduced ioremap_flags() to use by drivers who want to pass explicit flags to ioremap (and it can be hooked). The old __ioremap() is still there as a low level and cannot be hooked, thus drivers who use it should migrate unless they know they want the low level version. The patch "arch provides generic iomap missing accessors" (should be number 4 in this series) is a pre-requisite to provide full iomap API support with this patch. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
12d04eef |
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10-Nov-2006 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[POWERPC] Refactor 64 bits DMA operations This patch completely refactors DMA operations for 64 bits powerpc. 32 bits is untouched for now. We use the new dev_archdata structure to add the dma operations pointer and associated data to struct device. While at it, we also add the OF node pointer and numa node. In the future, we might want to look into merging that with pci_dn as well. The old vio, pci-iommu and pci-direct DMA ops are gone. They are now replaced by a set of generic iommu and direct DMA ops (non PCI specific) that can be used by bus types. The toplevel implementation is now inline. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
7eebde70 |
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10-Nov-2006 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[POWERPC] Souped-up of_platform_device support This patch first splits of_device.c and of_platform.c, the later containing the bits relative to of_platform_device's. On the "breaks" side of things, drivers uisng of_platform_device(s) need to include asm/of_platform.h now and of_(un)register_driver is now of_(un)register_platform_driver. In addition to a few utility functions to locate of_platform_device(s), the main new addition is of_platform_bus_probe() which allows the platform code to trigger an automatic creation of of_platform_devices for a whole tree of devices. The function acts based on the type of the various "parent" devices encountered from a provided root, using either a default known list of bus types that can be "probed" or a passed-in list. It will only register devices on busses matching that list, which mean that typically, it will not register PCI devices, as expected (since they will be picked up by the PCI layer). This will be used by Cell platforms using 4xx-type IOs in the Axon bridge and can be used by any embedded-type device as well. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
4c75a6f4 |
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10-Nov-2006 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[POWERPC] Generic DCR infrastructure This patch adds new dcr_map/dcr_read/dcr_write accessors for DCRs that can be used by drivers to transparently address either native DCRs or memory mapped DCRs. The implementation for memory mapped DCRs is done after the binding being currently worked on for SLOF and the Axon chipset. This patch enables it for the cell native platform Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
2fcd3429 |
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02-Nov-2006 |
Sascha Hauer <s.hauer@pengutronix.de> |
[PATCH] Make nvram_64.o a 64bit-only object Make nvram_64.o dependent on 64bit, not on MULTIPLATFORM. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
dd6c89f6 |
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27-Oct-2006 |
Andy Fleming <afleming@freescale.com> |
[POWERPC] Fix oprofile support for e500 in arch/powerpc Fixed a compile error in building the 85xx support with oprofile, and in the process cleaned up some issues with the fsl_booke performance monitor code. * Reorganized FSL Book-E performance monitoring code so that the 7450 wouldn't be built if the e500 was, and cleaned it up so it was more self-contained. * Added a cpu_setup function for FSL Book-E. The original cpu_setup function prototype had no arguments, assuming that the reg_setup function would copy the required information into variables which represented the registers. This was silly for e500, since it has 1 register per counter (rather than 3 for all counters), so the code has been restructured to have cpu_setup take the current counter config array as an argument, with op_powerpc_setup() invoking op_powerpc_cpu_setup() through on_each_cpu(), and op_powerpc_cpu_setup() invoking the model-specific cpu_setup function with an argument. The argument is ignored on all other platforms at present. * Fixed a confusing line where a trinary operator only had two arguments Signed-off-by: Andrew Fleming <afleming@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
5adcaf50 |
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19-Sep-2006 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] convert string i/o operations to C This produces essentially the same code and will make the iSeries i/o consolidation easier. The count parameter is changed to long since that will produce the same (better) code on 32 and 64 bit builds. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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#
c0803799 |
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31-Aug-2006 |
Al Viro <viro@zeniv.linux.org.uk> |
[PATCH] syscall classes hookup for ppc and s390 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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#
2e974251 |
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10-Aug-2006 |
Olof Johansson <olof@lixom.net> |
[POWERPC] Rename cpu_setup_power4.S to cpu_setup_ppc970.S Rename cpu_setup_power4.S to cpu_setup_ppc970.S, since that's really what it is. No functional or other changes. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
b6f35b49 |
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04-Jul-2006 |
Michael Ellerman <michael@ellerman.id.au> |
[POWERPC] Make crash.c work on 32-bit and 64-bit To compile kexec on 32-bit we need a few more bits and pieces. Rather than add empty definitions, we can make crash.c work on 32-bit, with only a couple of kludges. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
127efeb2 |
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27-Jun-2006 |
Stephen Rothwell <sfr@canb.auug.org.au> |
[POWERPC] Consolidate some of kernel/misc*.S There were some common functions (mainly i/o). Also some small white space cleanups and remove a couple of small unused functions. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
f39224a8 |
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18-Apr-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: Use correct sequence for putting CPU into nap mode We weren't using the recommended sequence for putting the CPU into nap mode. When I changed the idle loop, for some reason 7447A cpus started hanging when we put them into nap mode. Changing to the recommended sequence fixes that. The complexity here is that the recommended sequence is a loop that keeps putting the cpu back into nap mode. Clearly we need some way to break out of the loop when an interrupt (external interrupt, decrementer, performance monitor) occurs. Here we use a bit in the thread_info struct to indicate that we need this, and the exception entry code notices this and arranges for the exception to return to the value in the link register, thus breaking out of the loop. We use a new `local_flags' field in the thread_info which we can alter without needing to use an atomic update sequence. The PPC970 has the same recommended sequence, so we do the same thing there too. This also fixes a bug in the kernel stack overflow handling code on 32-bit, since it was causing a value that we needed in a register to get trashed. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
8b844dd7 |
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27-Mar-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: Move perfmon_fsl_booke.c over to arch/powerpc Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
ed981856 |
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27-Mar-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: Move module.c over to arch/powerpc ... and rename it to module_32.c since it is the 32-bit version. The 32-bit and 64-bit ABIs are sufficiently different that having a merged version isn't really practical. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
9b781727 |
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27-Mar-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: Move cpu_setup_6xx.S and temp.c over to arch/powerpc Also renamed temp.c to tau_6xx.c (for thermal assist unit) and updated the Kconfig option description and help text for CONFIG_TAU. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
0eb4cb9b |
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26-Mar-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: Move l2cr.S over to arch/powerpc No functional changes, but call it l2cr_6xx.S since it is specific to 6xx-family (including G3/750 and G4/74xx) processors. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
a0652fc9 |
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26-Mar-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: Unify the 32 and 64 bit idle loops This unifies the 32-bit (ARCH=ppc and ARCH=powerpc) and 64-bit idle loops. It brings over the concept of having a ppc_md.power_save function from 32-bit to ARCH=powerpc, which lets us get rid of native_idle(). With this we will also be able to simplify the idle handling for pSeries and cell. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
8568daa4 |
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09-Feb-2006 |
Paul Mackerras <paulus@samba.org> |
ppc: Use the system call table from arch/powerpc/kernel/systbl.S With this, new system calls only have to be wired up in one place for ARCH=ppc and ARCH=powerpc, rather than 2. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
e05b3b4a |
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15-Jan-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc/32: Restore previous version of 32-bit PCI code When I removed the powermac support from arch/ppc/kernel/pci.c, I overlooked the fact that that file is used in 32-bit ARCH=powerpc builds. To prevent problems in future, restore the original version of that file as arch/powerpc/kernel/pci_32.c, and use that. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
624cee31 |
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12-Jan-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: make ARCH=ppc use arch/powerpc/kernel/process.c Commit 5388fb1025443ec223ba556b10efc4c5f83f8682 made signal_32.c use discard_lazy_cpu_state, which broke ARCH=ppc because that uses the common signal_32.c but has its own process.c. Make ARCH=ppc use the common process.c to fix this and to reduce the amount of duplicated code. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
97b1b999 |
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10-Jan-2006 |
Michael Ellerman <michael@ellerman.id.au> |
[PATCH] powerpc: Don't build crash.c for PPC32 arch/powerpc/kernel/crash.c isn't safe for PPC32 (yet?), so don't build it. Built with CONFIG_KEXEC=y for pmac32_defconfig, pseries_defconfig, and g5_defconfig. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
e6a6d2ef |
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09-Jan-2006 |
Christoph Hellwig <hch@lst.de> |
[PATCH] sanitize building of fs/compat_ioctl.c Now that all these entries in the arch ioctl32.c files are gone [1], we can build fs/compat_ioctl.c as a normal object and kill tons of cruft. We need a special do_ioctl32_pointer handler for s390 so the compat_ptr call is done. This is not needed but harmless on all other architectures. Also remove some superflous includes in fs/compat_ioctl.c Tested on ppc64. [1] parisc still had it's PPP handler left, which is not fully correct for ppp and besides that ppp uses the generic SIOCPRIV ioctl so it'd kick in for all netdevice users. We can introduce a proper handler in one of the next patch series by adding a compat_ioctl method to struct net_device but for now let's just kill it - parisc doesn't compile in mainline anyway and I don't want this to block this patchset. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <willy@debian.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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#
13b8a272 |
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09-Jan-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: Introduce a new config symbol to control 16550 early debug code The previous change by Kumar Gala in this area led to legacy_serial.c and udbg_16550.c being built as modules when CONFIG_SERIAL_8250=m. Fix this by introducing a new symbol, CONFIG_PPC_UDBG_16550, to control whether these files get built, and arrange for it to be selected for those platforms that need it. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
be42d5fa |
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09-Jan-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: unbreak iSeries compilation again We don't set CONFIG_PPC_MULTIPLATFORM on iSeries (yet). Avoid compiling in the prom_init stuff on iSeries. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
0a498d96 |
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09-Jan-2006 |
Paul Mackerras <paulus@samba.org> |
powerpc: set CONFIG_PPC_OF=y always for ARCH=powerpc The CONFIG_PPC_OF symbol is used to mean that the firmware device tree access functions are available. Since we always have a device tree with ARCH=powerpc, make CONFIG_PPC_OF always Y for ARCH=powerpc. This fixes some compile errors reported by Kumar Gala, but in a different way to his patch. This also makes prom_parse.o be compiled only if CONFIG_PPC_OF so that non-OF ARCH=ppc platforms will compile. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
79e7bac0 |
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21-Dec-2005 |
Kumar Gala <galak@gate.crashing.org> |
[PATCH] powerpc: Call find_legacy_serial_ports() if we enable CONFIG_SERIAL_8250 In setup_arch and setup_system call find_legacy_serial_ports() if we build in support for 8250 serial ports instead of basing it on PPC_MULTIPLATFORM. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
cc532915 |
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04-Dec-2005 |
Michael Ellerman <michael@ellerman.id.au> |
[PATCH] powerpc: Add arch dependent basic infrastructure for Kdump. Implementing the machine_crash_shutdown which will be called by crash_kexec (called in case of a panic, sysrq etc.). Disable the interrupts, shootdown cpus using debugger IPI and collect regs for all CPUs. elfcorehdr= specifies the location of elf core header stored by the crashed kernel. This command line option will be passed by the kexec-tools to capture kernel. savemaxmem= specifies the actual memory size that the first kernel has and this value will be used for dumping in the capture kernel. This command line option will be passed by the kexec-tools to capture kernel. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
0cc4746c |
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04-Dec-2005 |
Michael Ellerman <michael@ellerman.id.au> |
[PATCH] powerpc: Reroute interrupts from 0 + offset to PHYSICAL_START + offset Regardless of where the kernel's linked we always get interrupts at low addresses. This patch creates a trampoline in the first 3 pages of memory, where interrupts land, and patches those addresses to jump into the real kernel code at PHYSICAL_START. We also need to reserve the trampoline code and a bit more in prom.c Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
51d3082f |
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22-Nov-2005 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[PATCH] powerpc: Unify udbg (#2) This patch unifies udbg for both ppc32 and ppc64 when building the merged achitecture. xmon now has a single "back end". The powermac udbg stuff gets enriched with some ADB capabilities and btext output. In addition, the early_init callback is now called on ppc32 as well, approx. in the same order as ppc64 regarding device-tree manipulations. The init sequences of ppc32 and ppc64 are getting closer, I'll unify them in a later patch. For now, you can force udbg to the scc using "sccdbg" or to btext using "btextdbg" on powermacs. I'll implement a cleaner way of forcing udbg output to something else than the autodetected OF output device in a later patch. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
463ce0e1 |
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22-Nov-2005 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[PATCH] powerpc: serial port discovery (#2) This moves the discovery of legacy serial ports to a separate file, makes it common to ppc32 and ppc64, and reworks it to use the new OF address translators to get to the ports early. This new version can also detect some PCI serial cards using legacy chips and will probably match those discovered port with the default console choice. Only ppc64 gets udbg still yet, unifying udbg isn't finished yet. It also adds some speed-probing code to udbg so that the default console can come up at the same speed it was set to by the firmware. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
d1405b86 |
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22-Nov-2005 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[PATCH] powerpc: Add OF address parsing code (#2) Parsing addresses extracted from Open Firmware isn't a simple matter. We have various bits of code that try to do it in various place, including some heuristics in prom.c that pre-parse addresses at boot and fill device-nodes "addrs", but those are dodgy at best and I want to deprecate them. So this patch introduces a new set of routines that should be capable of parsing most types of addresses and translating them into CPU physical addresses. It currently works for things on PCI busses and ISA busses and should work on "standard" busses like the root bus or the MacIO bus that don't put funky flags in addresses. If you have other bus types that do use funky flags, you'll have to add new bus type translators, which is fairly easy. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
d7a30103 |
|
16-Nov-2005 |
Heiko J Schick <schihei@de.ibm.com> |
[PATCH] powerpc: IBMEBUS bus support This patch adds the necessary core bus support used by device drivers that sit on the IBM GX bus on modern pSeries machines like the Galaxy infiniband for example. It provide transparent DMA ops (the low level driver works with virtual addresses directly) along with a simple bus layer using the Open Firmware matching routines. Signed-off-by: Heiko J Schick <schickhj@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
3d1229d6 |
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14-Nov-2005 |
Michael Ellerman <michael@ellerman.id.au> |
[PATCH] powerpc: Merge kexec This patch merges, to some extent, the PPC32 and PPC64 kexec implementations. We adopt the PPC32 approach of having ppc_md callbacks for the kexec functions. The current PPC64 implementation becomes the "default" implementation for PPC64 which platforms can select if they need no special treatment. I've added these default callbacks to pseries/maple/cell/powermac, this means iSeries no longer supports kexec - but it never worked anyway. I've renamed PPC32's machine_kexec_simple to default_machine_kexec, inline with PPC64. Judging by the comments it might be better named machine_kexec_non_of, or something, but at the moment it's the only implementation for PPC32 so it's the "default". Kexec requires machine_shutdown(), which is in machine_kexec.c on PPC32, but we already have in setup-common.c on powerpc. All this does is call ppc_md.nvram_sync, which only powermac implements, so instead make machine_shutdown a ppc_md member and have it call core99_nvram_sync directly on powermac. I've also stuck relocate_kernel.S into misc_32.S for powerpc. Built for ARCH=ppc, and 32 & 64 bit ARCH=powerpc, with KEXEC=y/n. Booted on P5 LPAR and successfully kexec'ed. Should apply on top of 493f25ef4087395891c99fcfe2c72e62e293e89f. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
437a58db |
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17-Nov-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Move remaining .c files from arch/ppc64 to arch/powerpc This also deletes the now-unused Makefiles under arch/ppc64. Both of the files moved over could use some merging, but for now I have moved them as-is and arranged for them to be used only in 64-bit kernels. For 32-bit kernels we still use arch/ppc/kernel/idle.c and drivers/char/generic_nvram.c as before. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
5daf9071 |
|
17-Nov-2005 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[PATCH] powerpc: merge align.c This patch merges align.c, the result isn't quite what was in ppc64 nor what was in ppc32 :) It should implement all the functionalities of both though. Kumar, since you played with that in the past, I suppose you have some test cases for verifying that it works properly before I dig out the 601 machine ? :) Since it's likely that I won't be able to test all scenario, code inspection is much welcome. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
7568cb4e |
|
13-Nov-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Move most remaining ppc64 files over to arch/powerpc Also deletes files in arch/ppc64 that are no longer used now that we don't compile with ARCH=ppc64 any more. Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
3136254c |
|
13-Nov-2005 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[PATCH] powerpc: kill ppc64 rtc.c, use genrtc instead This moves the rtas RTC callbacks to rtas-rtc.c in arch/powerpc/kernel, and kills the rest of arch/ppc64/kernel/rtc.c which was just a duplicate of the genrtc functionality. Also enable build of genrtc for CONFIG_PPC64 (it just works are we already have the required callbacks) and enable it in all defconfigs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
a7f290da |
|
11-Nov-2005 |
Benjamin Herrenschmidt <benh@kernel.crashing.org> |
[PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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#
35cd8785 |
|
10-Nov-2005 |
David Gibson <david@gibson.dropbear.id.au> |
[PATCH] powerpc: Move udbg code to arch/powerpc Since the udbg code in ppc64 has no ppc32 equivalent, move it straight over into arch/powerpc (and include/asm-powerpc for udbg.h). In time, we probably want to meld the various bits and pieces of 32-bit early debugging code into udbg, but for now only include it on CONFIG_PPC64=y builds. The only change during the move is to standardise the protecting #ifdef/#define in udbg.h, and move its banner comment above the initial #ifdef (which seems to be normal practice). Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64). Built for 32bit multiplatform (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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d3d2176a |
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09-Nov-2005 |
David Gibson <david@gibson.dropbear.id.au> |
[PATCH] powerpc: Move more ppc64 files with no ppc32 equivalent to powerpc This patch moves a bunch more files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: hvcall.h proc_ppc64.c sysfs.c lparcfg.c rtas_pci.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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8882a4da |
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08-Nov-2005 |
David Gibson <david@gibson.dropbear.id.au> |
[PATCH] powerpc: Move various ppc64 files with no ppc32 equivalent to powerpc This patch moves a bunch of files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: abs_addr.h compat.h lppaca.h paca.h tce.h cpu_setup_power4.S ioctl32.c firmware.c pacaData.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed - pacaData.c renamed paca.c to remove studlyCaps - Misplaced { moved in lppaca.h Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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756e7104 |
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09-Nov-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
powerpc: merge irq.c Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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5ad57078 |
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04-Nov-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Merge smp.c and smp.h This also moves setup_cpu_maps to setup-common.c (calling it smp_setup_cpu_maps) and uses it on both 32-bit and 64-bit. Signed-off-by: Paul Mackerras <paulus@samba.org>
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8ad200d7 |
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03-Nov-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Merge smp-tbsync.c (the generic timebase sync routine) Signed-off-by: Paul Mackerras <paulus@samba.org>
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62f4f47d |
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02-Nov-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
powerpc: move ppc64/kernel/signal.c to arch/powerpc Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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f4fcbbe9 |
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02-Nov-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Merge remaining RTAS code This moves rtas-proc.c and rtas_flash.c into arch/powerpc/kernel, since cell wants them as well as pseries (and chrp can use rtas-proc.c too, at least in principle). rtas_fw.c is gone, with its bits moved into rtas_flash.c and rtas.c. Signed-off-by: Paul Mackerras <paulus@samba.org>
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e9add2ee |
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31-Oct-2005 |
Arnd Bergmann <arndb@de.ibm.com> |
[PATCH] powerpc: move rtas_fw.c out of platforms/pseries Cell uses the same code as pSeries for flashing the firmware through rtas, so the implementation should not be part of platforms/pseries. Put it into arch/powerpc/kernel instead. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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640768ee |
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27-Oct-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
ppc64: use the merged syscall table This allows us to also use entry_64.S from the merged tree and reverts the setup_64.c part of fda262b8978d0089758ef9444508434c74113a61. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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e6b4fe92 |
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27-Oct-2005 |
Kumar Gala <galak@freescale.com> |
[PATCH] powerpc: only build idle_6xx for 6xx For the current time idle_6xx only applies to 6xx ppc32 CPUs Signed-off-by: Kumar K. Gala <kumar.gala@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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9675c7eb |
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27-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
ppc64: Include arch/powerpc/kernel/setup-common.o ... which is needed now that ARCH=ppc64 is using the merged setup_64.c. Signed-off-by: Paul Mackerras <paulus@samba.org>
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25c8a78b |
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27-Oct-2005 |
David Gibson <david@gibson.dropbear.id.au> |
[PATCH] powerpc: Fix handling of fpscr on 64-bit The recent merge of fpu.S broken the handling of fpscr for ARCH=powerpc and CONFIG_PPC64=y. FP registers could be corrupted, leading to strange random application crashes. The confusion arises, because the thread_struct has (and requires) a 64-bit area to save the fpscr, because we use load/store double instructions to get it in to/out of the FPU. However, only the low 32-bits are actually used, so we want to treat it as a 32-bit quantity when manipulating its bits to avoid extra load/stores on 32-bit. This patch replaces the current definition with a structure of two 32-bit quantities (pad and val), to clarify things as much as is possible. The 'val' field is used when manipulating bits, the structure itself is used when obtaining the address for loading/unloading the value from the FPU. While we're at it, consolidate the 4 (!) almost identical versions of cvt_fd() and cvt_df() (arch/ppc/kernel/misc.S, arch/ppc64/kernel/misc.S, arch/powerpc/kernel/misc_32.S, arch/powerpc/kernel/misc_64.S) into a single version in fpu.S. The new version takes a pointer to thread_struct and applies the correct offset itself, rather than a pointer to the fpscr field itself, again to avoid confusion as to which is the correct field to use. Finally, this patch makes ARCH=ppc64 also use the consolidated fpu.S code, which it previously did not. Built for G5 (ARCH=ppc64 and ARCH=powerpc), 32-bit powermac (ARCH=ppc and ARCH=powerpc) and Walnut (ARCH=ppc, CONFIG_MATH_EMULATION=y). Booted on G5 (ARCH=powerpc) and things which previously fell over no longer do. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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fda262b8 |
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27-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
[PATCH] ppc64: remove arch/ppc64/kernel/setup.c and use setup_64.c from the merged tree instead. The only difference between them was the code to set up the syscall maps. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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03501dab |
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26-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Pull common bits of setup_{32,64}.c into setup-common.c This creates a new arch/powerpc/kernel/setup-common.c with various bits that setup_32.c and setup_64.c had in common - functions like machine_shutdown/restart/power_off, show_cpuinfo, set_preferred_console etc. Signed-off-by: Paul Mackerras <paulus@samba.org>
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033ef338 |
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26-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Merge rtas.c into arch/powerpc/kernel This splits arch/ppc64/kernel/rtas.c into arch/powerpc/kernel/rtas.c, which contains generic RTAS functions useful on any CHRP platform, and arch/powerpc/platforms/pseries/rtas-fw.[ch], which contain some pSeries-specific firmware flashing bits. The parts of rtas.c that are to do with pSeries-specific error logging are protected by a new CONFIG_RTAS_ERROR_LOGGING symbol. The inclusion of rtas.o is controlled by the CONFIG_PPC_RTAS symbol, and the relevant platforms select that. Signed-off-by: Paul Mackerras <paulus@samba.org>
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58046019 |
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23-Oct-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
powerpc: Merge arch/ppc64/kernel/vio.c into arch/powerpc/kernel/vio.c Merge arch/ppc64/kernel/vio.c into arch/powerpc/kernel/vio.c, update the Makefiles to make it work, and make ARCH=ppc64 still work. Michael's version put vio.c in arch/powerpc/sysedv but after consolting Paulus, this one puts it in arch/powerpc/kernel. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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f7f6f4fe |
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18-Oct-2005 |
David Gibson <david@gibson.dropbear.id.au> |
[PATCH] powerpc: Merge ppc64 pmc.[ch] with ppc32 perfmon.[ch] This patches the ppc32 and ppc64 versions of the headers and .c files with helper functions for manipulating the performance counting hardware. As a side effect, it removes use of the term "perfmon" from ppc32, thus avoiding confusion with the unrelated performance counter interface from HP Labs also called "perfmon". Built, but not booted, for g5, pSeries, iSeries, and 32-bit Powermac with both ARCH=powerpc and ARCH=ppc{,64} as appropriate. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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f2783c15 |
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19-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Merge time.c and asm/time.h. We now use the merged time.c for both 32-bit and 64-bit compilation with ARCH=powerpc, and for ARCH=ppc64, but not for ARCH=ppc32. This removes setup_default_decr (folds its function into time_init) and moves wakeup_decrementer into time.c. This also makes an asm-powerpc/rtc.h. Signed-off-by: Paul Mackerras <paulus@samba.org>
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b123923d |
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19-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Move ptrace32.c from arch/ppc64 to arch/powerpc Also corrected my email address in ptrace.c and updated the comments at the top of ptrace32.c. Signed-off-by: Paul Mackerras <paulus@samba.org>
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77f543cb |
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17-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Fix various compile errors with ARCH=ppc, ppc64 and powerpc This makes ppc use the syscalls.c from arch/powerpc/kernel, exports copy_and_flush from head_32.S for use by prom_init.c (ARCH=powerpc), and consolidates the sys_fadvise64_64 implementations for 32-bit. Signed-off-by: Paul Mackerras <paulus@samba.org>
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81e7009e |
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17-Oct-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
powerpc: merge ppc signal.c and ppc64 signal32.c Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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30286ef6 |
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17-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Merge syscalls.c and sys_ppc32.c. Signed-off-by: Paul Mackerras <paulus@samba.org>
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e8a30302 |
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12-Oct-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
powerpc: merge ptrace.c Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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eec5ef90 |
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12-Oct-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
ppc64: use powerpc of_device.c Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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d4bf9a78 |
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12-Oct-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
ppc64: merge binfmt_elf32.c and use start_thread for both 32 and 64 bit bineries. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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4920960f |
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11-Oct-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
powerpc: consolidate cputable.c Also simplify arch/ppc64/kernel/Makefile Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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3abec857 |
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11-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
ppc64: Use merged versions of init_task.c and process.c. These two files are now built in arch/powerpc/kernel instead of arch/ppc64/kernel. Signed-off-by: Paul Mackerras <paulus@samba.org>
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fd582ec8 |
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11-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
ppc: Various minor compile fixes This fixes up a variety of minor problems in compiling with ARCH=ppc arising from using the merged versions of various header files. A lot of the changes are just adding #include <asm/machdep.h> to files that use ppc_md or smp_ops_t. This also arranges for us to use semaphore.c, vecemu.c, vector.S and fpu.S from arch/powerpc/kernel when compiling with ARCH=ppc. Signed-off-by: Paul Mackerras <paulus@samba.org>
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40ef8cbc |
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10-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Get 64-bit configs to compile with ARCH=powerpc This is a bunch of mostly small fixes that are needed to get ARCH=powerpc to compile for 64-bit. This adds setup_64.c from arch/ppc64/kernel/setup.c and locks.c from arch/ppc64/lib/locks.c. Signed-off-by: Paul Mackerras <paulus@samba.org>
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bc6f8a4b |
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10-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: move lparmap.c to arch/powerpc/kernel Since lparmap.s gets included in arch/powerpc/kernel/head_64.S, this avoids depending on a file in another directory. Signed-off-by: Paul Mackerras <paulus@samba.org>
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9994a338 |
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10-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Introduce entry_{32,64}.S, misc_{32,64}.S, systbl.S The system call table has been consolidated into systbl.S. We have separate 32-bit and 64-bit versions of entry.S and misc.S since the code is mostly sufficiently different to be not worth merging. There are some common bits that will be extracted in future. Signed-off-by: Paul Mackerras <paulus@samba.org>
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70d64cea |
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10-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Rename files to have consistent _32/_64 suffixes This doesn't change any code, just renames things so we consistently have foo_32.c and foo_64.c where we have separate 32- and 64-bit versions. Signed-off-by: Paul Mackerras <paulus@samba.org>
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b3491269 |
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05-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Use the merged of_device.c with ARCH=powerpc Also compile btext.c with -fPIC; this was missed before. Signed-off-by: Paul Mackerras <paulus@samba.org>
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9b6b563c |
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05-Oct-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Merge in the ppc64 version of the prom code. This brings in the ppc64 version of prom_init.c, prom.c and btext.c and makes them work for ppc32. This also brings in the new calling convention, where the first entry to the kernel (with r5 != 0) goes to the prom_init code, which then restarts from the beginning (with r5 == 0) after it has done its stuff. For now this also brings in the ppc32 version of setup.c. It also merges lmb.h. Signed-off-by: Paul Mackerras <paulus@samba.org>
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cabb5587 |
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30-Sep-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
powerpc: make iSeries build Merge vmlinux.lds.S. Also remove arch/powerpc/kernel/vmlinux.lds which is a generated file. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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bd142b70 |
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29-Sep-2005 |
Stephen Rothwell <sfr@canb.auug.org.au> |
ppc64: simplify the build a little Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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20c8c210 |
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28-Sep-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Fixes to get the merged kernel to boot on powermac. This merges ppc_ksyms.c, puts back the actual do_execve call in sys_execve, makes init_MMU call find_end_of_memory rather than ppc_md.find_end_of_memory (every platform has a device tree with a /memory node now, right?) and fixes some problems with the mpic initialization on newworld powermacs. Signed-off-by: Paul Mackerras <paulus@samba.org>
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14cf11af |
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26-Sep-2005 |
Paul Mackerras <paulus@samba.org> |
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
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