[PATCH v4 0/6] support FEAT_MTE_TAGGED_FAR feature

[Yeoreum Yun]

Gentle ping inf case of forgotten.

> 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.
>
> Patch Sequences
> ================
>
> Patch #1 adds cpufeature FEAT_MTE_TAGGED_FAR
>
> Patch #2 adds MTE_FAR hwcaps and export address tag when it supports
>
> Patch #3 adds mtefar hwcap test
>
> Patch #4 prepares to add mtefar testcase
>
> Patch #5 refactor check_mmap_option with loop to add mtefar testcase
>
> Patch #6 adds mtefar test cases corresponding to
> each testcase of check_mmap_options
>
> Patch History
> ================
> v3 to v4:
>   - fix hwcap string for FEAT_MTE_TAGGED_FAR
>   - split cpufeature and hwcap modification and merge hwcap's
>     modification with exporting address tag patch
>   - add mtefar testcase on check_mmap_options
>   - https://lore.kernel.org/all/20250410074721.947380-1-yeoreum.yun@arm.com/
>
> v2 to v3:
>   - Rebase to 6.15-rc1
>   - https://lore.kernel.org/all/20250403172758.67106-1-yeoreum.yun@arm.com/
>
> v1 to v2:
>   - add hwcap test for MTE_FAR feature.
>   - add MTE_FAR doc into elf_hwcap.rst
>   - https://lore.kernel.org/all/20250403142707.26397-1-yeoreum.yun@arm.com/
>
>
> Yeoreum Yun (6):
>   arm64/cpufeature: add FEAT_MTE_TAGGED_FAR feature
>   arm64: report address tag when FEAT_MTE_TAGGED_FAR is supported
>   tools/kselftest: add MTE_FAR hwcap test
>   kselftest/arm64/mte: preparation for mtefar test
>   kselftest/arm64/mte: refactor check_mmap_option test
>   kselftest/arm64/mte: add mtefar test on check_mmap_option
>
>  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 +
>  .../selftests/arm64/mte/check_buffer_fill.c   |   2 +-
>  .../selftests/arm64/mte/check_child_memory.c  |   4 +-
>  .../arm64/mte/check_hugetlb_options.c         |   4 +-
>  .../selftests/arm64/mte/check_ksm_options.c   |   4 +-
>  .../selftests/arm64/mte/check_mmap_options.c  | 244 +++++++++++++-----
>  .../arm64/mte/check_tags_inclusion.c          |   2 +-
>  .../selftests/arm64/mte/check_user_mem.c      |   2 +-
>  .../selftests/arm64/mte/mte_common_util.c     |  70 ++++-
>  .../selftests/arm64/mte/mte_common_util.h     |   8 +-
>  tools/testing/selftests/arm64/mte/mte_def.h   |   8 +
>  19 files changed, 291 insertions(+), 97 deletions(-)
>
> --
> LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}
>

--
Sincerely,
Yeoreum Yun