diff options
| author | Yeoreum Yun <yeoreum.yun@arm.com> | 2025-06-18 09:45:04 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2025-07-02 17:44:10 +0100 |
| commit | 66984536899f49d388424cf9b158b0a664217cf6 (patch) | |
| tree | a9cd4726f7bc2ee309ce2a2a74f0d6da30e96771 | |
| parent | 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 (diff) | |
arm64/cpufeature: Add FEAT_MTE_TAGGED_FAR feature
Add FEAT_MTE_TAGGED_FAR cpucap which makes FAR_ELx report
all non-address bits on a synchronous MTE tag check fault since Armv8.9
Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
Acked-by: Yury Khrustalev <yury.khrustalev@arm.com>
Link: https://lore.kernel.org/r/20250618084513.1761345-2-yeoreum.yun@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 8 | ||||
| -rw-r--r-- | arch/arm64/tools/cpucaps | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index b34044e20128..af6a6924a3e8 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -320,6 +320,7 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = { static const struct arm64_ftr_bits ftr_id_aa64pfr2[] = { ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL1_FPMR_SHIFT, 4, 0), + ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL1_MTEFAR_SHIFT, 4, ID_AA64PFR2_EL1_MTEFAR_NI), ARM64_FTR_END, }; @@ -2874,6 +2875,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, ARM64_CPUID_FIELDS(ID_AA64PFR1_EL1, MTE, MTE3) }, + { + .desc = "FAR on MTE Tag Check Fault", + .capability = ARM64_MTE_FAR, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .matches = has_cpuid_feature, + ARM64_CPUID_FIELDS(ID_AA64PFR2_EL1, MTEFAR, IMP) + }, #endif /* CONFIG_ARM64_MTE */ { .desc = "RCpc load-acquire (LDAPR)", diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 10effd4cff6b..fe8f4f8ce95c 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -68,6 +68,7 @@ MPAM MPAM_HCR MTE MTE_ASYMM +MTE_FAR SME SME_FA64 SME2 |