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| author | Steven Price <steven.price@arm.com> | 2019-12-16 14:33:37 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-01-15 14:13:07 +0300 |
| commit | d4209d8b717311d114b5d47ba7f8249fd44e97c2 (patch) | |
| tree | ca1180c2cd7c364da1e92c187a0a42f6c4c7e000 /arch/arm64/include/asm | |
| parent | 46cf053efec6a3a5f343fead837777efe8252a46 (diff) | |
| download | linux-d4209d8b717311d114b5d47ba7f8249fd44e97c2.tar.xz | |
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 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/hwcap.h | 7 | ||||
| -rw-r--r-- | arch/arm64/include/asm/sysreg.h | 12 |
2 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h index 3d2f2472a36c..fcb390ea29ea 100644 --- a/arch/arm64/include/asm/hwcap.h +++ b/arch/arm64/include/asm/hwcap.h @@ -86,6 +86,13 @@ #define KERNEL_HWCAP_SVESM4 __khwcap2_feature(SVESM4) #define KERNEL_HWCAP_FLAGM2 __khwcap2_feature(FLAGM2) #define KERNEL_HWCAP_FRINT __khwcap2_feature(FRINT) +#define KERNEL_HWCAP_SVEI8MM __khwcap2_feature(SVEI8MM) +#define KERNEL_HWCAP_SVEF32MM __khwcap2_feature(SVEF32MM) +#define KERNEL_HWCAP_SVEF64MM __khwcap2_feature(SVEF64MM) +#define KERNEL_HWCAP_SVEBF16 __khwcap2_feature(SVEBF16) +#define KERNEL_HWCAP_I8MM __khwcap2_feature(I8MM) +#define KERNEL_HWCAP_DGH __khwcap2_feature(DGH) +#define KERNEL_HWCAP_BF16 __khwcap2_feature(BF16) /* * This yields a mask that user programs can use to figure out what diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 6e919fafb43d..f56c4a02a127 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -553,6 +553,10 @@ #define ID_AA64ISAR0_AES_SHIFT 4 /* id_aa64isar1 */ +#define ID_AA64ISAR1_I8MM_SHIFT 52 +#define ID_AA64ISAR1_DGH_SHIFT 48 +#define ID_AA64ISAR1_BF16_SHIFT 44 +#define ID_AA64ISAR1_SPECRES_SHIFT 40 #define ID_AA64ISAR1_SB_SHIFT 36 #define ID_AA64ISAR1_FRINTTS_SHIFT 32 #define ID_AA64ISAR1_GPI_SHIFT 28 @@ -605,12 +609,20 @@ #define ID_AA64PFR1_SSBS_PSTATE_INSNS 2 /* id_aa64zfr0 */ +#define ID_AA64ZFR0_F64MM_SHIFT 56 +#define ID_AA64ZFR0_F32MM_SHIFT 52 +#define ID_AA64ZFR0_I8MM_SHIFT 44 #define ID_AA64ZFR0_SM4_SHIFT 40 #define ID_AA64ZFR0_SHA3_SHIFT 32 +#define ID_AA64ZFR0_BF16_SHIFT 20 #define ID_AA64ZFR0_BITPERM_SHIFT 16 #define ID_AA64ZFR0_AES_SHIFT 4 #define ID_AA64ZFR0_SVEVER_SHIFT 0 +#define ID_AA64ZFR0_F64MM 0x1 +#define ID_AA64ZFR0_F32MM 0x1 +#define ID_AA64ZFR0_I8MM 0x1 +#define ID_AA64ZFR0_BF16 0x1 #define ID_AA64ZFR0_SM4 0x1 #define ID_AA64ZFR0_SHA3 0x1 #define ID_AA64ZFR0_BITPERM 0x1 |