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-rc4. The errata description can be found here. https://developer.arm.com/documentation/SDEN2148827/1000/?lang=en Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx> Cc: James Morse <james.morse@xxxxxxx> Cc: Jonathan Corbet <corbet@xxxxxxx> Cc: Mark Rutland <mark.rutland@xxxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Cc: linux-doc@xxxxxxxxxxxxxxx Changes in V2: - 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@xxxxxxx/ 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
