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| author | Steven Price <steven.price@arm.com> | 2019-12-16 12:33:37 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-01-15 12:13:07 +0100 |
| commit | d4209d8b717311d114b5d47ba7f8249fd44e97c2 (patch) | |
| tree | ca1180c2cd7c364da1e92c187a0a42f6c4c7e000 /Documentation/arm64 | |
| parent | Linux 5.5-rc3 (diff) | |
| download | linux-d4209d8b717311d114b5d47ba7f8249fd44e97c2.tar.xz linux-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')
| -rw-r--r-- | Documentation/arm64/cpu-feature-registers.rst | 14 | ||||
| -rw-r--r-- | Documentation/arm64/elf_hwcaps.rst | 27 |
2 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/arm64/cpu-feature-registers.rst b/Documentation/arm64/cpu-feature-registers.rst index b6e44884e3ad..27877d25dd9b 100644 --- a/Documentation/arm64/cpu-feature-registers.rst +++ b/Documentation/arm64/cpu-feature-registers.rst @@ -200,6 +200,12 @@ infrastructure: +------------------------------+---------+---------+ | Name | bits | visible | +------------------------------+---------+---------+ + | I8MM | [55-52] | y | + +------------------------------+---------+---------+ + | DGH | [51-48] | y | + +------------------------------+---------+---------+ + | BF16 | [47-44] | y | + +------------------------------+---------+---------+ | SB | [39-36] | y | +------------------------------+---------+---------+ | FRINTTS | [35-32] | y | @@ -234,10 +240,18 @@ infrastructure: +------------------------------+---------+---------+ | Name | bits | visible | +------------------------------+---------+---------+ + | F64MM | [59-56] | y | + +------------------------------+---------+---------+ + | F32MM | [55-52] | y | + +------------------------------+---------+---------+ + | I8MM | [47-44] | y | + +------------------------------+---------+---------+ | SM4 | [43-40] | y | +------------------------------+---------+---------+ | SHA3 | [35-32] | y | +------------------------------+---------+---------+ + | BF16 | [23-20] | y | + +------------------------------+---------+---------+ | BitPerm | [19-16] | y | +------------------------------+---------+---------+ | AES | [7-4] | y | 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 ----------------------- |