Some of the traps for nVHE SME support are provided as fine grained traps so add detection of fine grained traps in order to allow us to guard usage.
Signed-off-by: Mark Brown <[email protected]> --- arch/arm64/kernel/cpufeature.c | 11 +++++++++++ arch/arm64/tools/cpucaps | 1 + 2 files changed, 12 insertions(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index d9f09e40aaf6..ec060db1dcf0 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2400,6 +2400,17 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, .min_field_value = 1, }, + { + .desc = "Fine Grained Traps", + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .capability = ARM64_HAS_FGT, + .sys_reg = SYS_ID_AA64MMFR0_EL1, + .sign = FTR_UNSIGNED, + .field_pos = ID_AA64MMFR0_FGT_SHIFT, + .field_width = 4, + .min_field_value = 1, + .matches = has_cpuid_feature, + }, {}, }; diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 870c39537dd0..b3ada80aa48d 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -20,6 +20,7 @@ HAS_DCPOP HAS_E0PD HAS_ECV HAS_EPAN +HAS_FGT HAS_GENERIC_AUTH HAS_GENERIC_AUTH_ARCH HAS_GENERIC_AUTH_IMP_DEF -- 2.30.2 _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
