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12b9ac6d |
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21-Mar-2023 |
Mike Rapoport (IBM) <rppt@kernel.org> |
mips: fix comment about pgtable_init() Patch series "mm: move core MM initialization to mm/mm_init.c", v2. This set moves most of the core MM initialization to mm/mm_init.c. This largely includes free_area_init() and its helpers, functions used at boot time, mm_init() from init/main.c and some of the functions it calls. Aside from gaining some more space before mm/page_alloc.c hits 10k lines, this makes mm/page_alloc.c to be mostly about buddy allocator and moves the init code out of the way, which IMO improves maintainability. Besides, this allows to move a couple of declarations out of include/linux and make them private to mm/. And as an added bonus there a slight decrease in vmlinux size. For tinyconfig and defconfig on x86 I've got tinyconfig: text data bss dec hex filename 853206 289376 1200128 2342710 23bf36 a/vmlinux 853198 289344 1200128 2342670 23bf0e b/vmlinux defconfig: text data bss dec hex filename 26152959 9730634 2170884 38054477 244aa4d a/vmlinux 26152945 9730602 2170884 38054431 244aa1f b/vmlinux This patch (of 14): Comment about fixrange_init() says that its called from pgtable_init() while the actual caller is pagetabe_init(). Update comment to match the code. Link: https://lkml.kernel.org/r/20230321170513.2401534-1-rppt@kernel.org Link: https://lkml.kernel.org/r/20230321170513.2401534-2-rppt@kernel.org Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Philippe Mathieu-Daud <philmd@linaro.org> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Doug Berger <opendmb@gmail.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Michal Hocko <mhocko@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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a4c33e83 |
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03-Nov-2020 |
Thomas Gleixner <tglx@linutronix.de> |
mips/mm/highmem: Switch to generic kmap atomic No reason having the same code in every architecture Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20201103095857.885321106@linutronix.de
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e05c7b1f |
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08-Jun-2020 |
Mike Rapoport <rppt@kernel.org> |
mm: pgtable: add shortcuts for accessing kernel PMD and PTE The powerpc 32-bit implementation of pgtable has nice shortcuts for accessing kernel PMD and PTE for a given virtual address. Make these helpers available for all architectures. [rppt@linux.ibm.com: microblaze: fix page table traversal in setup_rt_frame()] Link: http://lkml.kernel.org/r/20200518191511.GD1118872@kernel.org [akpm@linux-foundation.org: s/pmd_ptr_k/pmd_off_k/ in various powerpc places] Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200514170327.31389-9-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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2bee1b58 |
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21-Nov-2019 |
Mike Rapoport <rppt@kernel.org> |
mips: add support for folded p4d page tables Implement primitives necessary for the 4th level folding, add walks of p4d level where appropriate, replace 5leve-fixup.h with pgtable-nop4d.h and drop usage of __ARCH_USE_5LEVEL_HACK. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Paul Burton <paulburton@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org Cc: Mike Rapoport <rppt@kernel.org>
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b633648c |
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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>
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19fd9629 |
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23-Jan-2014 |
Mark Salter <msalter@redhat.com> |
mips: use generic fixmap.h Signed-off-by: Mark Salter <msalter@redhat.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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70342287 |
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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>
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565b60de |
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07-Sep-2010 |
Kevin Cernekee <cernekee@gmail.com> |
MIPS: Move FIXADDR_TOP into spaces.h Memory maps and addressing quirks are normally defined in <spaces.h>. There are already three targets that need to override FIXADDR_TOP, and others exist. This will be a cleaner approach than adding lots of ifdefs in fixmap.h . Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1573/ Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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0f334a3e |
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07-Sep-2009 |
Kevin Cernekee <cernekee@gmail.com> |
MIPS: Fix machine check exception in kmap_coherent() On an SMP system with cache aliases, the following sequence of events may happen: 1) copy_user_highpage() runs on CPU0, invoking kmap_coherent() to create a temporary mapping in the fixmap region 2) copy_page() starts on CPU0 3) CPU1 sends CPU0 an IPI asking CPU0 to run local_r4k_flush_cache_page() 4) CPU0 takes the interrupt, interrupting copy_page() 5) local_r4k_flush_cache_page() on CPU0 calls kmap_coherent() again 6) The second invocation of kmap_coherent() on CPU0 tries to use the same fixmap virtual address that was being used by copy_user_highpage() 7) CPU0 throws a machine check exception for the TLB address conflict Fixed by creating an extra set of fixmap entries for use in interrupt handlers. This prevents fixmap VA conflicts between copy_user_highpage() running in user context, and local_r4k_flush_cache_page() invoked from an SMP IPI. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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e7300d04 |
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18-Aug-2009 |
Maxime Bizon <mbizon@freebox.fr> |
MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs. Signed-off-by: Maxime Bizon <mbizon@freebox.fr> Signed-off-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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bb86bf28 |
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25-Apr-2009 |
Ralf Baechle <ralf@linux-mips.org> |
MIPS: Fix highmem. Commit 351336929ccf222ae38ff0cb7a8dd5fd5c6236a0 (kernel.org) rsp. b3594a089f1c17ff919f8f78505c3f20e1f6f8ce (linux-mips.org): > From: Chris Dearman <chris@mips.com> > Date: Wed, 19 Sep 2007 00:58:24 +0100 > Subject: [PATCH] [MIPS] Allow setting of the cache attribute at run time. > > Slightly tacky, but there is a precedent in the sparc archirecture code. introduces the variable _page_cachable_default, which defaults to zero and. is used to create the prototype PTE for __kmap_atomic in arch/mips/mm/init.c:kmap_init before initialization in arch/mips/mm/c-r4k.c:coherency_setup, so the default value of 0 will be used as the CCA of kmap atomic pages which on many processors is not a defined CCA value and may result in writes to kmap_atomic pages getting corrupted. Debugged by Jon Fraser (jfraser@broadcom.com). Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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384740dc |
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16-Sep-2008 |
Ralf Baechle <ralf@linux-mips.org> |
MIPS: Move headfiles to new location below arch/mips/include Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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