#
b847bd64 |
|
09-Mar-2022 |
Kees Cook <keescook@chromium.org> |
MIPS: Only use current_stack_pointer on GCC Unfortunately, Clang did not have support for "sp" as a global register definition, and was crashing after the addition of current_stack_pointer. This has been fixed in Clang 14, but earlier Clang versions need to avoid this code, so add a versioned test and revert back to the open-coded asm instances. Fixes Clang build error: fatal error: error in backend: Invalid register name global variable Fixes: 200ed341b864 ("mips: Implement "current_stack_pointer"") Reported-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Link: https://lore.kernel.org/lkml/YikTQRql+il3HbrK@dev-arch.thelio-3990X Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Marc Zyngier <maz@kernel.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Yanteng Si <siyanteng01@gmail.com> Cc: linux-mips@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
|
#
200ed341 |
|
23-Feb-2022 |
Kees Cook <keescook@chromium.org> |
mips: Implement "current_stack_pointer" To follow the existing per-arch conventions replace open-coded uses of asm "sp" as "current_stack_pointer". This will let it be used in non-arch places (like HARDENED_USERCOPY). Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Marc Zyngier <maz@kernel.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Yanteng Si <siyanteng01@gmail.com> Cc: linux-mips@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
|
#
34fca894 |
|
28-Oct-2021 |
Yanteng Si <siyanteng01@gmail.com> |
MIPS: irq: Avoid an unused-variable error When CONFIG_IRQ_DOMAIN is set, there is a warning: arch/mips/kernel/irq.c:114:19: error: unused variable 'desc' [-Werror=unused-variable] 114 | struct irq_desc *desc; | ^~~~ This variable is unused, let's remove it. Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211028095652.3503790-1-siyanteng@loongson.cn
|
#
4cb6f4df |
|
20-Oct-2021 |
Mark Rutland <mark.rutland@arm.com> |
irq: mips: simplify do_domain_IRQ() There's no need fpr arch/mips's do_domain_IRQ() to open-code the NULL check performed by handle_irq_desc(), nor the resolution of the desc performed by generic_handle_domain_irq(). Use generic_handle_domain_irq() directly, as this is functioanlly equivalent and clearer. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Marc Zyngier <maz@kernel.org> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de>
|
#
1fee9db9 |
|
06-Jul-2021 |
Marc Zyngier <maz@kernel.org> |
irqchip/mips: Fix RCU violation when using irqdomain lookup on interrupt entry Since d4a45c68dc81 ("irqdomain: Protect the linear revmap with RCU"), any irqdomain lookup requires the RCU read lock to be held. This assumes that the architecture code will be structured such as irq_enter() will be called *before* the interrupt is looked up in the irq domain. However, this isn't the case for MIPS, and a number of drivers are structured to do it the other way around when handling an interrupt in their root irqchip (secondary irqchips are OK by construction). This results in a RCU splat on a lockdep-enabled kernel when the kernel takes an interrupt from idle, as reported by Guenter Roeck. Note that this could have fired previously if any driver had used tree-based irqdomain, which always had the RCU requirement. To solve this, provide a MIPS-specific helper (do_domain_IRQ()) as the pendent of do_IRQ() that will do thing in the right order (and maybe save some cycles in the process). Ideally, MIPS would be moved over to using handle_domain_irq(), but that's much more ambitious. Reported-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Guenter Roeck <linux@roeck-us.net> [maz: add dependency on CONFIG_IRQ_DOMAIN after report from the kernelci bot] Signed-off-by: Marc Zyngier <maz@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Serge Semin <fancer.lancer@gmail.com> Link: https://lore.kernel.org/r/20210705172352.GA56304@roeck-us.net Link: https://lore.kernel.org/r/20210706110647.3979002-1-maz@kernel.org
|
#
72faa7a7 |
|
16-Feb-2019 |
Liu Xiang <liu.xiang6@zte.com.cn> |
MIPS: irq: Allocate accurate order pages for irq stack The irq_pages is the number of pages for irq stack, but not the order which is needed by __get_free_pages(). We can use get_order() to calculate the accurate order. Signed-off-by: Liu Xiang <liu.xiang6@zte.com.cn> Signed-off-by: Paul Burton <paul.burton@mips.com> Fixes: fe8bd18ffea5 ("MIPS: Introduce irq_stack") Cc: linux-mips@vger.kernel.org Cc: stable@vger.kernel.org # v4.11+
|
#
fe8bd18f |
|
19-Dec-2016 |
Matt Redfearn <matt.redfearn@mips.com> |
MIPS: Introduce irq_stack Allocate a per-cpu irq stack for use within interrupt handlers. Also add a utility function on_irq_stack to determine if a given stack pointer is within the irq stack for that cpu. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Acked-by: Jason A. Donenfeld <jason@zx2c4.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Petr Mladek <pmladek@suse.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Aaron Tomlin <atomlin@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14740/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
7c0f6ba6 |
|
24-Dec-2016 |
Linus Torvalds <torvalds@linux-foundation.org> |
Replace <asm/uaccess.h> with <linux/uaccess.h> globally This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
640356a4 |
|
17-May-2016 |
Paul Burton <paulburton@kernel.org> |
MIPS: Clear Status IPL field when using EIC When using an external interrupt controller (EIC) the interrupt mask bits in the cop0 Status register are reused for the Interrupt Priority Level, and any interrupts with a priority lower than the field will be ignored. Clear the field to 0 by default such that all interrupts are serviced. Without doing so we default to arbitrarily ignoring all or some subset of interrupts. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reviewed-by: Matt Redfearn <matt.redfearn@imgtec.com> Tested-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Cc: Joe Perches <joe@perches.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/13272/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
cb2224d7 |
|
09-Jun-2015 |
Ralf Baechle <ralf@linux-mips.org> |
MIPS: IRQ/IP27: Move IRQ allocation API to platform code. allocate_irqno, free_irqno and alloc_legacy_irqno are a simple allocator for interrupt numbers from the days when the numer of interrupts was still fixed to NR_IRQS. This was necessary for the SGI IP27 architecture which with its flexible architecture and possibly large number of interrupts doesn't easily fit into the old pattern. These days there are better alternatives. Move the allocation code from the arch generic code to the only platform using it, the SGI IP27 aka Origin 200/2000, Onyx 2. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
52ea7bff |
|
31-May-2015 |
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> |
MIPS: Get rid of 'kgdb_early_setup' cruft. Commit 854700115ecf ([MIPS] kgdb: add arch support for the kernel's kgdb core) added the 'kgdb_early_setup' flag to avoid calling trap_init() and init_IRQ() the second time, however the code that called these functions earlier, from kgdb_arch_init(), had been already removed by that time, so the flag never served any useful purpose. Remove the related code along with ugly #ifdef'ery at last. [ralf@linux-mips.org: Folded in Guenter Roeck's fix.] Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Patchwork: https://patchwork.linux-mips.org/patch/10501/ Signed-off-by: Guenter Roeck <linux@roeck-us.net> Patchwork: https://patchwork.linux-mips.org/patch/10533/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
5f35b9cd |
|
04-Jun-2015 |
James Hogan <jhogan@kernel.org> |
MIPS: Fix enabling of DEBUG_STACKOVERFLOW Commit 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection") added kernel stack overflow detection, however it only enabled it conditional upon the preprocessor definition DEBUG_STACKOVERFLOW, which is never actually defined. The Kconfig option is called DEBUG_STACKOVERFLOW, which manifests to the preprocessor as CONFIG_DEBUG_STACKOVERFLOW, so switch it to using that definition instead. Fixes: 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Adam Jiang <jiang.adam@gmail.com> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 2.6.37+ Patchwork: http://patchwork.linux-mips.org/patch/10531/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
884e7e5e |
|
20-May-2015 |
Joe Perches <joe@perches.com> |
MIPS: irq: Use DECLARE_BITMAP Use the generic mechanism to declare a bitmap instead of unsigned long. This could fix an overwrite defect of whatever follows irq_map. Not all "#define NR_IRQS <value>" are a multiple of BITS_PER_LONG so using DECLARE_BITMAP allocates the proper number of longs required for the possible bits. For instance: arch/mips/include/asm/mach-ath79/irq.h:#define NR_IRQS 51 arch/mips/include/asm/mach-db1x00/irq.h:#define NR_IRQS 152 arch/mips/include/asm/mach-lantiq/falcon/irq.h:#define NR_IRQS 328 Signed-off-by: Joe Perches <joe@perches.com> Cc: linux-mips <linux-mips@linux-mips.org> Cc: LKML <linux-kernel@vger.kernel.org> Cc: Gabor Juhos <juhosg@openwrt.org> Cc: Manuel Lauss <manuel.lauss@googlemail.com> Cc: John Crispin <blogic@openwrt.org> Patchwork: https://patchwork.linux-mips.org/patch/10091/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
b633648c |
|
23-May-2014 |
Ralf Baechle <ralf@linux-mips.org> |
MIPS: MT: Remove SMTC support Nobody is maintaining SMTC anymore and there also seems to be no userbase. Which is a pity - the SMTC technology primarily developed by Kevin D. Kissell <kevink@paralogos.com> is an ingenious demonstration for the MT ASE's power and elegance. Based on Markos Chandras <Markos.Chandras@imgtec.com> patch https://patchwork.linux-mips.org/patch/6719/ which while very similar did no longer apply cleanly when I tried to merge it plus some additional post-SMTC cleanup - SMTC was a feature as tricky to remove as it was to merge once upon a time. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
91bbefe6 |
|
13-Mar-2014 |
Peter Zijlstra <peterz@infradead.org> |
arch,mips: Convert smp_mb__*() MIPS is interesting and has hardware variants that reorder over ll/sc as well as those that do not. Implement the 2 new barrier functions as per the old barriers. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Link: http://lkml.kernel.org/n/tip-9ph49jbae3hol9v721sbc2g6@git.kernel.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Maciej W. Rozycki" <macro@codesourcery.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Will Deacon <will.deacon@arm.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
#
70342287 |
|
21-Jan-2013 |
Ralf Baechle <ralf@linux-mips.org> |
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
b81947c6 |
|
28-Mar-2012 |
David Howells <dhowells@redhat.com> |
Disintegrate asm/system.h for MIPS Disintegrate asm/system.h for MIPS. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> cc: linux-mips@linux-mips.org
|
#
848484e2 |
|
23-Jul-2011 |
Paul Gortmaker <paul.gortmaker@windriver.com> |
mips: remove needless include of module.h from core kernel files. None of these files are using modular infrastructure, and build tests reveal that none of these files are really relying on any implicit inclusions via. module.h either. So delete them. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
|
#
60063497 |
|
26-Jul-2011 |
Arun Sharma <asharma@fb.com> |
atomic: use <linux/atomic.h> This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
e4ec7989 |
|
27-Mar-2011 |
Thomas Gleixner <tglx@linutronix.de> |
MIPS: Convert the irq functions to the new names Scripted with coccinelle. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
#
f8396c17 |
|
23-Mar-2011 |
Thomas Gleixner <tglx@linutronix.de> |
MIPS: Use generic show_interrupts() Signed-off-by: Thomas Gleixner <tglx@linutronix.de> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2195/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
930cd54b |
|
23-Mar-2011 |
Thomas Gleixner <tglx@linutronix.de> |
MIPS: SMTC: Cleanup the hook mess and use irq_data Signed-off-by: Thomas Gleixner <tglx@linutronix.de> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2194/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
334c86c4 |
|
27-Aug-2010 |
From: jiang.adam@gmail.com <From: jiang.adam@gmail.com> |
MIPS: IRQ: Add stackoverflow detection Add stackoverflow detection to mips arch Signed-off-by: Adam Jiang <jiang.adam@gmail.com> Cc: dmitri.vorobiev@movial.com Cc: wuzhangjin@gmail.com Cc: ddaney@caviumnetworks.com Cc: peterz@infradead.org Cc: fweisbec@gmail.com Cc: tj@kernel.org Cc: tglx@linutronix.de Cc: mingo@elte.hu Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1559/ Patchwork: https://patchwork.linux-mips.org/patch/1651/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
5a0e3ad6 |
|
24-Mar-2010 |
Tejun Heo <tj@kernel.org> |
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
|
#
8f99a162 |
|
20-Nov-2009 |
Wu Zhangjin <wuzhangjin@gmail.com> |
MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS This patch add a new section for MIPS to record the block of the hardirq handling for function graph tracer(print_graph_irq) via adding the __irq_entry annotation to the the entrypoints of the hardirqs(the block with irq_enter()...irq_exit()). Thanks goes to Steven & Frederic Weisbecker for their feedbacks. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Nicholas Mc Guire <der.herr@hofr.at> Cc: zhangfx@lemote.com Cc: Wu Zhangjin <wuzhangjin@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/676/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
239007b8 |
|
17-Nov-2009 |
Thomas Gleixner <tglx@linutronix.de> |
genirq: Convert irq_desc.lock to raw_spinlock Convert locks which cannot be sleeping locks in preempt-rt to raw_spinlocks. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Ingo Molnar <mingo@elte.hu>
|
#
5312dc6b |
|
27-Feb-2009 |
Ralf Baechle <ralf@linux-mips.org> |
Revert "MIPS: Print irq handler description" This reverts commit 558d1de8ba9ebb1cc3f3062f1371b9330772164f.
|
#
0b0f0b1c |
|
11-Jan-2009 |
Yinghai Lu <yinghai@kernel.org> |
sparseirq: use kstat_irqs_cpu on non-x86 architectures too so we could move kstat_irqs array to irq_desc struct. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
|
#
dee4102a |
|
11-Jan-2009 |
Yinghai Lu <yinghai@kernel.org> |
sparseirq: use kstat_irqs_cpu instead Impact: build fix Ingo Molnar wrote: > tip/arch/blackfin/kernel/irqchip.c: In function 'show_interrupts': > tip/arch/blackfin/kernel/irqchip.c:85: error: 'struct kernel_stat' has no member named 'irqs' > make[2]: *** [arch/blackfin/kernel/irqchip.o] Error 1 > make[2]: *** Waiting for unfinished jobs.... > So could move kstat_irqs array to irq_desc struct. (s390, m68k, sparc) are not touched yet, because they don't support genirq Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
|
#
558d1de8 |
|
21-Dec-2008 |
Manuel Lauss <mano@roarinelk.homelinux.net> |
MIPS: Print irq handler description Add the name set by set_irq_chip_and_handler_name() to the output of /proc/interrupts, like so: db1200 ~ # cat /proc/interrupts CPU0 8: 52 Alchemy-IC0-hilevel serial 10: 171 Alchemy-IC0-hilevel au1xxx-mmc 11: 47 Alchemy-IC0-hilevel Au1xxx dbdma 18: 1 Alchemy-IC0-hilevel au1550-spi 29: 1250997 Alchemy-IC0-riseedge timer 37: 211 Alchemy-IC0-hilevel ehci_hcd:usb1, ohci_hcd:usb2 38: 0 Alchemy-IC0-hilevel lcd 72: 2623 DB1200 CPLD-level ide0 73: 257 DB1200 CPLD-level eth0 84: 1 DB1200 CPLD-level sd_insert 85: 0 DB1200 CPLD-level sd_eject ERR: 0 Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
88547001 |
|
29-Jul-2008 |
Jason Wessel <jason.wessel@windriver.com> |
[MIPS] kgdb: add arch support for the kernel's kgdb core The new kgdb architecture specific handler registers and unregisters dynamically for exceptions depending on when you configure a kgdb I/O driver. Aside from initializing the exceptions earlier in the boot process, kgdb should have no impact on a device when it is compiled in so long as an I/O module is not configured for use. There have been quite a number of contributors during the existence of this patch (see arch/mips/kernel/kgdb.c). Most recently Jason re-wrote the mips kgdb logic to use the die notification handlers. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
8d60a903 |
|
29-Jul-2008 |
Jason Wessel <jason.wessel@windriver.com> |
[MIPS] kgdb: Remove existing implementation This patch explicitly removes the kgdb implementation, for mips which is intended to be followed by a patch that adds a kgdb implementation for MIPS that makes use of the kgdb core in the kernel. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
f366e208 |
|
29-May-2008 |
Dmitri Vorobiev <dmitri.vorobiev@movial.fi> |
[MIPS] unexport {allocate,free}_irqno The following routines allocate_irqno() free_irqno() seem not to be used outside of the core kernel code, hence exporting these functions is pointless. This patch removes the export. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.fi> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
24649c00 |
|
08-Feb-2008 |
Ralf Baechle <ralf@linux-mips.org> |
MIPS: Mark all but i8259 interrupts as no-probe. Use set_irq_noprobe() to mark all MIPS interrupts as non-probe. Override that default for i8259 interrupts. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-and-tested-by: Rob Landley <rob@landley.net> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
21a151d8 |
|
11-Oct-2007 |
Ralf Baechle <ralf@linux-mips.org> |
[MIPS] checkfiles: Fix "need space after that ','" errors. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
1146fe30 |
|
21-Sep-2007 |
Ralf Baechle <ralf@linux-mips.org> |
[MIPS] SMTC: Make ack_bad_irq() safe with no IM backstop. Issue reported and original patch by Kevin Kissel, cleaner (imho) implementation by me. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
f543110d |
|
09-May-2007 |
Atsushi Nemoto <anemo@mba.ocn.ne.jp> |
[MIPS] Drop __devinit tag from allocate_irqno() and free_irqno() This fix these warnings: WARNING: arch/mips/kernel/built-in.o - Section mismatch: reference to .init.text:free_irqno from __ksymtab_gpl between '__ksymtab_free_irqno' (at offset 0x0) and '__ksymtab_allocate_irqno' WARNING: arch/mips/kernel/built-in.o - Section mismatch: reference to .init.text:allocate_irqno from __ksymtab_gpl after '__ksymtab_allocate_irqno' (at offset 0x8) Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
1ccd1c1c |
|
05-Dec-2006 |
Atsushi Nemoto <anemo@mba.ocn.ne.jp> |
[MIPS] genirq: use name instead of typename The "typename" field was obsoleted by the "name" field. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
187933f2 |
|
25-Oct-2006 |
Atsushi Nemoto <anemo@mba.ocn.ne.jp> |
[MIPS] do_IRQ cleanup Now we have both function and macro version of do_IRQ() and the former is used only by DEC and non-preemptive kernel. This patch makes everyone use the macro version and removes the function version. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
1603b5ac |
|
01-Nov-2006 |
Atsushi Nemoto <anemo@mba.ocn.ne.jp> |
[MIPS] IRQ cleanups This is a big irq cleanup patch. * Use set_irq_chip() to register irq_chip. * Initialize .mask, .unmask, .mask_ack field. Functions for these method are already exist in most case. * Do not initialize .startup, .shutdown, .enable, .disable fields if default routines provided by irq_chip_set_defaults() were suitable. * Remove redundant irq_desc initializations. * Remove unnecessary local_irq_save/local_irq_restore, spin_lock. With this cleanup, it would be easy to switch to slightly lightwait irq flow handlers (handle_level_irq(), etc.) instead of __do_IRQ(). Though whole this patch is quite large, changes in each irq_chip are not quite simple. Please review and test on your platform. Thanks. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
4a4cf779 |
|
06-Nov-2006 |
Ralf Baechle <ralf@linux-mips.org> |
[MIPS] Make irq number allocator generally available for fixing EV64120. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
937a8015 |
|
07-Oct-2006 |
Ralf Baechle <ralf@linux-mips.org> |
[MIPS] Complete fixes after removal of pt_regs argument to int handlers. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
7d12e780 |
|
05-Oct-2006 |
David Howells <dhowells@redhat.com> |
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
|
#
94dee171 |
|
02-Jul-2006 |
Ralf Baechle <ralf@linux-mips.org> |
[MIPS] Eleminate interrupt migration helper use. > #define hw_interrupt_type irq_chip > typedef struct irq_chip hw_irq_controller; > #define no_irq_type no_irq_chip > typedef struct irq_desc irq_desc_t; Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
6ab3d562 |
|
30-Jun-2006 |
Jörn Engel <joern@wohnheim.fh-wedel.de> |
Remove obsolete #include <linux/config.h> Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
|
#
d1bef4ed |
|
29-Jun-2006 |
Ingo Molnar <mingo@elte.hu> |
[PATCH] genirq: rename desc->handler to desc->chip This patch-queue improves the generic IRQ layer to be truly generic, by adding various abstractions and features to it, without impacting existing functionality. While the queue can be best described as "fix and improve everything in the generic IRQ layer that we could think of", and thus it consists of many smaller features and lots of cleanups, the one feature that stands out most is the new 'irq chip' abstraction. The irq-chip abstraction is about describing and coding and IRQ controller driver by mapping its raw hardware capabilities [and quirks, if needed] in a straightforward way, without having to think about "IRQ flow" (level/edge/etc.) type of details. This stands in contrast with the current 'irq-type' model of genirq architectures, which 'mixes' raw hardware capabilities with 'flow' details. The patchset supports both types of irq controller designs at once, and converts i386 and x86_64 to the new irq-chip design. As a bonus side-effect of the irq-chip approach, chained interrupt controllers (master/slave PIC constructs, etc.) are now supported by design as well. The end result of this patchset intends to be simpler architecture-level code and more consolidation between architectures. We reused many bits of code and many concepts from Russell King's ARM IRQ layer, the merging of which was one of the motivations for this patchset. This patch: rename desc->handler to desc->chip. Originally i did not want to do this, because it's a big patch. But having both "desc->handler", "desc->handle_irq" and "action->handler" caused a large degree of confusion and made the code appear alot less clean than it truly is. I have also attempted a dual approach as well by introducing a desc->chip alias - but that just wasnt robust enough and broke frequently. So lets get over with this quickly. The conversion was done automatically via scripts and converts all the code in the kernel. This renaming patch is the first one amongst the patches, so that the remaining patches can stay flexible and can be merged and split up without having some big monolithic patch act as a merge barrier. [akpm@osdl.org: build fix] [akpm@osdl.org: another build fix] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
|
#
41c594ab |
|
05-Apr-2006 |
Ralf Baechle <ralf@linux-mips.org> |
[MIPS] MT: Improved multithreading support. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
93373ed4 |
|
01-Apr-2006 |
Ralf Baechle <ralf@linux-mips.org> |
[MIPS] Rewrite spurious_interrupt from assembler to C. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
#
394e3902 |
|
23-Mar-2006 |
Andrew Morton <akpm@osdl.org> |
[PATCH] more for_each_cpu() conversions When we stop allocating percpu memory for not-possible CPUs we must not touch the percpu data for not-possible CPUs at all. The correct way of doing this is to test cpu_possible() or to use for_each_cpu(). This patch is a kernel-wide sweep of all instances of NR_CPUS. I found very few instances of this bug, if any. But the patch converts lots of open-coded test to use the preferred helper macros. Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Acked-by: Kyle McMartin <kyle@parisc-linux.org> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: Andi Kleen <ak@muc.de> Cc: Christian Zankel <chris@zankel.net> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: Nathan Scott <nathans@sgi.com> Cc: Jens Axboe <axboe@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
|
#
42a3b4f2 |
|
03-Sep-2005 |
Ralf Baechle <ralf@linux-mips.org> |
[PATCH] mips: nuke trailing whitespace Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
|
#
1da177e4 |
|
16-Apr-2005 |
Linus Torvalds <torvalds@ppc970.osdl.org> |
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
|