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| author |   Steven Price <steven.price@arm.com> | 2019-12-16 11:33:37 +0000 |
|---|---|---|
| committer |   Will Deacon <will@kernel.org> | 2020-01-15 11:13:07 +0000 |
| commit | d4209d8b717311d114b5d47ba7f8249fd44e97c2 (patch) | |
| tree | ca1180c2cd7c364da1e92c187a0a42f6c4c7e000 /Documentation/arm64/elf_hwcaps.rst | |
| parent | Linux 5.5-rc3 (diff) | |
| download | linux-dev-d4209d8b717311d114b5d47ba7f8249fd44e97c2.tar.xz linux-dev-d4209d8b717311d114b5d47ba7f8249fd44e97c2.zip | |
arm64: cpufeature: Export matrix and other features to userspace
Export the features introduced as part of ARMv8.6 exposed in the
ID_AA64ISAR1_EL1 and ID_AA64ZFR0_EL1 registers. This introduces the
Matrix features (ARMv8.2-I8MM, ARMv8.2-F64MM and ARMv8.2-F32MM) along
with BFloat16 (Armv8.2-BF16), speculation invalidation (SPECRES) and
Data Gathering Hint (ARMv8.0-DGH).
Signed-off-by: Julien Grall <julien.grall@arm.com>
[Added other features in those registers]
Signed-off-by: Steven Price <steven.price@arm.com>
[will: Don't advertise SPECRES to userspace]
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'Documentation/arm64/elf_hwcaps.rst')
| -rw-r--r-- | Documentation/arm64/elf_hwcaps.rst | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/arm64/elf_hwcaps.rst b/Documentation/arm64/elf_hwcaps.rst index 7fa3d215ae6a..4fafc57d8e73 100644 --- a/Documentation/arm64/elf_hwcaps.rst +++ b/Documentation/arm64/elf_hwcaps.rst @@ -204,6 +204,33 @@ HWCAP2_FRINT Functionality implied by ID_AA64ISAR1_EL1.FRINTTS == 0b0001. +HWCAP2_SVEI8MM + + Functionality implied by ID_AA64ZFR0_EL1.I8MM == 0b0001. + +HWCAP2_SVEF32MM + + Functionality implied by ID_AA64ZFR0_EL1.F32MM == 0b0001. + +HWCAP2_SVEF64MM + + Functionality implied by ID_AA64ZFR0_EL1.F64MM == 0b0001. + +HWCAP2_SVEBF16 + + Functionality implied by ID_AA64ZFR0_EL1.BF16 == 0b0001. + +HWCAP2_I8MM + + Functionality implied by ID_AA64ISAR1_EL1.I8MM == 0b0001. + +HWCAP2_BF16 + + Functionality implied by ID_AA64ISAR1_EL1.BF16 == 0b0001. + +HWCAP2_DGH + + Functionality implied by ID_AA64ISAR1_EL1.DGH == 0b0001. 4. Unused AT_HWCAP bits ----------------------- |