diff options
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index f06629bf2..2799e7e99 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1049,6 +1049,16 @@ static u64 read_id_reg(struct sys_reg_desc const *r, bool raz) kvm_debug("LORegions unsupported for guests, suppressing\n"); val &= ~(0xfUL << ID_AA64MMFR1_LOR_SHIFT); + } else if (id == SYS_ID_AA64DFR0_EL1) { + /* Limit guests to PMUv3 for ARMv8.1 */ + val = cpuid_feature_cap_perfmon_field(val, + ID_AA64DFR0_PMUVER_SHIFT, + ID_AA64DFR0_PMUVER_8_1); + } else if (id == SYS_ID_DFR0_EL1) { + /* Limit guests to PMUv3 for ARMv8.1 */ + val = cpuid_feature_cap_perfmon_field(val, + ID_DFR0_PERFMON_SHIFT, + ID_DFR0_PERFMON_8_1); } return val; |