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25b9a3ca |
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19-Sep-2023 |
Randy Dunlap <rdunlap@infradead.org> |
xtensa: tlb: include <asm/tlb.h> for missing prototype Add the prototype for check_tlb_sanity() to <asm/tlb.h> and use that header to prevent a build warning: arch/xtensa/mm/tlb.c:273:6: warning: no previous prototype for 'check_tlb_sanity' [-Wmissing-prototypes] 273 | void check_tlb_sanity(void) Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Message-Id: <20230920052139.10570-13-rdunlap@infradead.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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56e0d1cb |
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08-Jun-2023 |
Hugh Dickins <hughd@google.com> |
xtensa: add pte_unmap() to balance pte_offset_map() To keep balance in future, remember to pte_unmap() after a successful pte_offset_map(). And act as if get_pte_for_vaddr() really needs a map there, to read the pteval before "unmapping", to be sure page table is not removed. Link: https://lkml.kernel.org/r/ab2581eb-daa6-894e-4aa6-97c81de3b8c@google.com Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Chris Zankel <chris@zankel.net> Cc: Claudio Imbrenda <imbrenda@linux.ibm.com> Cc: David Hildenbrand <david@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: John David Anglin <dave.anglin@bell.net> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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1c4664fa |
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03-Jan-2022 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: define update_mmu_tlb function Before the commit f9ce0be71d1f ("mm: Cleanup faultaround and finish_fault() codepaths") there was a call to update_mmu_cache in alloc_set_pte that used to invalidate TLB entry caching invalid PTE that caused a page fault. That commit removed that call so now invalid TLB entry survives causing repetitive page faults on the CPU that took the initial fault until that TLB entry is occasionally evicted. This issue is spotted by the xtensa TLB sanity checker. Fix this issue by defining update_mmu_tlb function that flushes TLB entry for the faulting address. Cc: stable@vger.kernel.org # 5.12+ Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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36de10c4 |
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13-Nov-2019 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: fix TLB sanity checker Virtual and translated addresses retrieved by the xtensa TLB sanity checker must be consistent, i.e. correspond to the same state of the checked TLB entry. KASAN shadow memory is mapped dynamically using auto-refill TLB entries and thus may change TLB state between the virtual and translated address retrieval, resulting in false TLB insanity report. Move read_xtlb_translation close to read_xtlb_virtual to make sure that read values are consistent. Cc: stable@vger.kernel.org Fixes: a99e07ee5e88 ("xtensa: check TLB sanity on return to userspace") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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f5ee2567 |
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05-Nov-2019 |
Mike Rapoport <rppt@kernel.org> |
xtensa: get rid of __ARCH_USE_5LEVEL_HACK xtensa has 2-level page tables and already uses pgtable-nopmd for page table folding. Add walks of p4d level where appropriate and drop usage of __ARCH_USE_5LEVEL_HACK. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Message-Id: <1572964400-16542-3-git-send-email-rppt@kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> [fix up arch/xtensa/include/asm/fixmap.h and arch/xtensa/mm/tlb.c]
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f0d1eab8 |
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05-Nov-2019 |
Mike Rapoport <rppt@kernel.org> |
xtensa: mm: fix PMD folding implementation There was a definition of pmd_offset() in arch/xtensa/include/asm/pgtable.h that shadowed the generic implementation defined in include/asm-generic/pgtable-nopmd.h. As the result, xtensa had shortcuts in page table traversal in several places instead of doing level unfolding. Remove local override for pmd_offset() and add page table unfolding where necessary. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Message-Id: <1572964400-16542-2-git-send-email-rppt@kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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c130d3be |
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15-Dec-2017 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: clean up custom-controlled debug output Replace #ifdef'fed/commented out debug printk statements with pr_debug. Replace printk statements with pr_* equivalents. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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e1534ae9 |
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15-Jan-2016 |
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> |
mm: differentiate page_mapped() from page_mapcount() for compound pages Let's define page_mapped() to be true for compound pages if any sub-pages of the compound page is mapped (with PMD or PTE). On other hand page_mapcount() return mapcount for this particular small page. This will make cases like page_get_anon_vma() behave correctly once we allow huge pages to be mapped with PTE. Most users outside core-mm should use page_mapcount() instead of page_mapped(). Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Tested-by: Sasha Levin <sasha.levin@oracle.com> Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Jerome Marchand <jmarchan@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Steve Capper <steve.capper@linaro.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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04c6b3e2 |
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14-Feb-2014 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: optimize local_flush_tlb_kernel_range Don't flush whole TLB if only a small kernel range is requested. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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f615136c |
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16-Oct-2013 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: add SMP support This is largely based on SMP code from the xtensa-2.6.29-smp tree by Piet Delaney, Marc Gauthier, Joe Taylor, Christian Zankel (and possibly other Tensilica folks). Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
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a99e07ee |
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15-May-2013 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: check TLB sanity on return to userspace - check that user TLB mappings correspond to the current page table; - check that TLB mapping VPN is in the kernel/user address range in accordance with its ASID. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
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87962c4d |
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15-May-2013 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: flush TLB entries for pages of non-current mm correctly Sometimes under high memory pressure one process gets a page of another process, which manifests itself with an invalid instruction exception. This happens because flush_tlb_page fails to clear TLB entries when called with vma that does not belong to current mm, because it does not set RASID appropriately. When page reclaiming mechanism swaps physical pages out replacing their PTEs with none or swap PTEs, it calls flush_tlb_page. Later physical page may be reused elsewhere, but the stale TLB mapping still refers to it, allowing process that owned the mapping to see the new state of that physical page. Put ASID of the mm that owns vma to the RASID to fix that issue. Also replace otherwise meaningless local_save_flags with local_irq_save. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
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c4c4594b |
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28-Nov-2012 |
Chris Zankel <chris@zankel.net> |
xtensa: clean up files to make them code-style compliant Remove heading and trailing spaces, trim trailing lines, and wrap lines that are longer than 80 characters. Signed-off-by: Chris Zankel <chris@zankel.net>
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382cb5b9 |
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04-Nov-2012 |
Max Filippov <jcmvbkbc@gmail.com> |
xtensa: fix build warning for arch/xtensa/mm/tlb.c Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
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f9aa7e18 |
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28-Mar-2012 |
David Howells <dhowells@redhat.com> |
Disintegrate asm/system.h for Xtensa Disintegrate asm/system.h for Xtensa. Signed-off-by: David Howells <dhowells@redhat.com> cc: Chris Zankel <chris@zankel.net>
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173d6681 |
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10-Dec-2006 |
Chris Zankel <czankel@tensilica.com> |
[PATCH] xtensa: remove extra header files The Xtensa port contained many header files that were never needed. This rather lengthy patch removes all those files. Unfortunately, there were many dependencies that needed to be updated, so this patch touches quite a few source files. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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f30c2269 |
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03-Oct-2006 |
Uwe Zeisberger <Uwe_Zeisberger@digi.com> |
fix file specification in comments Many files include the filename at the beginning, serveral used a wrong one. Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
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3f65ce4d |
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23-Jun-2005 |
Chris Zankel <czankel@tensilica.com> |
[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 5 The attached patches provides part 5 of an architecture implementation for the Tensilica Xtensa CPU series. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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