[PATCH v2 0/3] support FEAT_MTE_TAGGED_FAR feature

[Yeoreum Yun <yeoreum.yun@arm.com>]

The FEAT_MTE_TAGGED_FAR feature provides support for
reporting all non-address bits during a synchronous MTE tag check fault.

This patchset extends the reporting tag to include
not only the memory tag (logical tag) but also the address tag via
si_addr when FEAT_MTE_TAGGED_FAR feature is supported.

Since v1:
  - add hwcap test for MTE_FAR feature.
  - add MTE_FAR doc into elf_hwcap.rst


Yeoreum Yun (3):
  arm64: add FEAT_MTE_TAGGED_FAR feature
  arm64/mm/fault: use original FAR_EL1 value when ARM64_MTE_FAR is
    supported
  tools/kselftest: add MTE_FAR hwcap test

 Documentation/arch/arm64/elf_hwcaps.rst      |  3 +++
 Documentation/arch/arm64/tagged-pointers.rst | 11 ++++++-----
 arch/arm64/include/asm/hwcap.h               |  1 +
 arch/arm64/include/uapi/asm/hwcap.h          |  1 +
 arch/arm64/kernel/cpufeature.c               |  9 +++++++++
 arch/arm64/kernel/cpuinfo.c                  |  1 +
 arch/arm64/mm/fault.c                        |  7 +++++--
 arch/arm64/tools/cpucaps                     |  1 +
 tools/testing/selftests/arm64/abi/hwcap.c    |  6 ++++++
 9 files changed, 33 insertions(+), 7 deletions(-)

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