Messages in this thread | | | From | Anshuman Khandual <> | Subject | [PATCH V3 0/2] arm64: errata: Workaround Cortex-A715 errata #2645198 | Date | Wed, 16 Nov 2022 19:39:13 +0530 |
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This series adds Cortex-A715 partnumber and workarounds the errata #2645198 which gets triggered when an userspace page mapping permission changes from executable to non-executable, corrupting both ESR_EL1/FAR_EL1 registers when an instruction abort is taken.
This series applies on v6.1-rc5.
The errata description can be found here.
https://developer.arm.com/documentation/SDEN2148827/1000/?lang=en
Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: James Morse <james.morse@arm.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-doc@vger.kernel.org
Changes in V3:
- Replaced __set_pte_at() with set_pte_at() in ptep_modify_prot_commit() - Dropped local variable 'pte_t pte', replaced with direct READ_ONCE(*ptep) - Moved cpus_have_const_cap() earlier as per Catalin
Changes in V2:
https://lore.kernel.org/all/20221113012645.190301-1-anshuman.khandual@arm.com/
- Added ptep_modify_prot_start/commit declaration into [asm/pgtable.h] - Moved ptep_modify_prot_start/commit definitions into [arch/arm64/mm/mmu.c] - Above code movements solved ptep_clear_flush() related build dependency - Replaced __flush_tlb_range() with ptep_clear_flush()/huge_ptep_clear_flush()
Changes in V1:
https://lore.kernel.org/all/20221027023915.1318100-1-anshuman.khandual@arm.com/
Anshuman Khandual (2): arm64: Add Cortex-715 CPU part definition arm64: errata: Workaround possible Cortex-A715 [ESR|FAR]_ELx corruption
Documentation/arm64/silicon-errata.rst | 2 ++ arch/arm64/Kconfig | 16 ++++++++++++++++ arch/arm64/include/asm/cputype.h | 2 ++ arch/arm64/include/asm/hugetlb.h | 9 +++++++++ arch/arm64/include/asm/pgtable.h | 9 +++++++++ arch/arm64/kernel/cpu_errata.c | 7 +++++++ arch/arm64/mm/hugetlbpage.c | 21 +++++++++++++++++++++ arch/arm64/mm/mmu.c | 21 +++++++++++++++++++++ arch/arm64/tools/cpucaps | 1 + 9 files changed, 88 insertions(+)
-- 2.25.1
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