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| author | Mark Brown <broonie@kernel.org> | 2022-02-16 17:32:23 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-02-25 14:41:05 +0000 |
| commit | d082a0255fcb8fcb4bd8257df111f2caa67086bc (patch) | |
| tree | d258cb9a841b10c882bf18bb34bc02bc2f6c297c /Documentation/arm64/elf_hwcaps.rst | |
| parent | cb627397e02bc65e44912daebfe0bbe6b0ecd384 (diff) | |
| download | lwn-d082a0255fcb8fcb4bd8257df111f2caa67086bc.tar.gz lwn-d082a0255fcb8fcb4bd8257df111f2caa67086bc.zip | |
arm64/mte: Add hwcap for asymmetric mode
Allow userspace to detect support for asymmetric mode by providing a hwcap
for it, using the official feature name FEAT_MTE3.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Vincenzo Frascino <Vincenzo.Frascino@arm.com>
Tested-by: Branislav Rankov <branislav.rankov@arm.com>
Link: https://lore.kernel.org/r/20220216173224.2342152-4-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'Documentation/arm64/elf_hwcaps.rst')
| -rw-r--r-- | Documentation/arm64/elf_hwcaps.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/arm64/elf_hwcaps.rst b/Documentation/arm64/elf_hwcaps.rst index b72ff17d600a..a8f30963e550 100644 --- a/Documentation/arm64/elf_hwcaps.rst +++ b/Documentation/arm64/elf_hwcaps.rst @@ -259,6 +259,11 @@ HWCAP2_RPRES Functionality implied by ID_AA64ISAR2_EL1.RPRES == 0b0001. +HWCAP2_MTE3 + + Functionality implied by ID_AA64PFR1_EL1.MTE == 0b0011, as described + by Documentation/arm64/memory-tagging-extension.rst. + 4. Unused AT_HWCAP bits ----------------------- |