diff options
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 03d1c9d7af82..3d1a5677321e 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -864,7 +864,11 @@ static inline bool cpu_has_hw_af(void) if (!IS_ENABLED(CONFIG_ARM64_HW_AFDBM)) return false; - mmfr1 = read_cpuid(ID_AA64MMFR1_EL1); + /* + * Use cached version to avoid emulated msr operation on KVM + * guests. + */ + mmfr1 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1); return cpuid_feature_extract_unsigned_field(mmfr1, ID_AA64MMFR1_EL1_HAFDBS_SHIFT); } |