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| author | Mark Brown <broonie@kernel.org> | 2022-08-29 16:48:15 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-09-06 18:53:52 +0100 |
| commit | 81ff692ad924da2233381bedff90c5c1f5c31368 (patch) | |
| tree | 87b4ebedbeb97cda17ed4ad288d743bab98aed0c /Documentation/arm64 | |
| parent | b90cb1053190353cc30f0fef0ef1f378ccc063c5 (diff) | |
| download | lwn-81ff692ad924da2233381bedff90c5c1f5c31368.tar.gz lwn-81ff692ad924da2233381bedff90c5c1f5c31368.zip | |
arm64/sysreg: Add hwcap for SVE EBF16
SVE has a separate identification register indicating support for BFloat16
operations. Add a hwcap identifying support for EBF16 in this register,
mirroring what we did for the non-SVE case.
While there is currently an architectural requirement for BF16 support to
be the same in SVE and non-SVE contexts there are separate identification
registers this separate hwcap helps avoid issues if that requirement were
to be relaxed in the future, we have already chosen to have a separate
capability for base BF16 support.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220829154815.832347-1-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation/arm64')
| -rw-r--r-- | Documentation/arm64/elf_hwcaps.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/arm64/elf_hwcaps.rst b/Documentation/arm64/elf_hwcaps.rst index 311021f2e560..bb34287c8e01 100644 --- a/Documentation/arm64/elf_hwcaps.rst +++ b/Documentation/arm64/elf_hwcaps.rst @@ -272,6 +272,9 @@ HWCAP2_WFXT HWCAP2_EBF16 Functionality implied by ID_AA64ISAR1_EL1.BF16 == 0b0010. +HWCAP2_SVE_EBF16 + Functionality implied by ID_AA64ZFR0_EL1.BF16 == 0b0010. + 4. Unused AT_HWCAP bits ----------------------- |