[PATCH 0/2] arm64: errata: Workaround Cortex-A715 errata #2645198

[Anshuman Khandual]

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-rc1.

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

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       | 24 +++++++++++++++++
 arch/arm64/kernel/cpu_errata.c         |  7 +++++
 arch/arm64/mm/hugetlbpage.c            | 37 ++++++++++++++++++++++++++
 arch/arm64/tools/cpucaps               |  1 +
 8 files changed, 98 insertions(+)

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2.25.1