diff options
| author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2015-09-09 14:05:57 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-01 15:06:41 +0200 |
| commit | 1cea0ce68ed76490ffa64a9e2a7a40104efe9352 (patch) | |
| tree | c0705c37ce6c4ec90e9143ca449a24c8700341ee /arch/x86/kvm | |
| parent | 7ec362964d6cc228ea68572fdd6d75a59f8b40fa (diff) | |
KVM: VMX: drop rdtscp_enabled field
Check cpuid bit instead of it
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/cpuid.h | 8 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 17 |
2 files changed, 14 insertions, 11 deletions
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index aed7bfeeaf0d..d434ee952b00 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -141,4 +141,12 @@ static inline bool guest_cpuid_has_pcommit(struct kvm_vcpu *vcpu) best = kvm_find_cpuid_entry(vcpu, 7, 0); return best && (best->ebx & bit(X86_FEATURE_PCOMMIT)); } + +static inline bool guest_cpuid_has_rdtscp(struct kvm_vcpu *vcpu) +{ + struct kvm_cpuid_entry2 *best; + + best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); + return best && (best->edx & bit(X86_FEATURE_RDTSCP)); +} #endif diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 2937cf136df6..6f3f97f6e248 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -532,8 +532,6 @@ struct vcpu_vmx { s64 vnmi_blocked_time; u32 exit_reason; - bool rdtscp_enabled; - /* Posted interrupt descriptor */ struct pi_desc pi_desc; @@ -2208,7 +2206,7 @@ static void setup_msrs(struct vcpu_vmx *vmx) if (index >= 0) move_msr_up(vmx, index, save_nmsrs++); index = __find_msr_index(vmx, MSR_TSC_AUX); - if (index >= 0 && vmx->rdtscp_enabled) + if (index >= 0 && guest_cpuid_has_rdtscp(&vmx->vcpu)) move_msr_up(vmx, index, save_nmsrs++); /* * MSR_STAR is only needed on long mode guests, and only @@ -2675,7 +2673,7 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) msr_info->data = vcpu->arch.ia32_xss; break; case MSR_TSC_AUX: - if (!to_vmx(vcpu)->rdtscp_enabled) + if (!guest_cpuid_has_rdtscp(vcpu)) return 1; /* Otherwise falls through */ default: @@ -2781,7 +2779,7 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) clear_atomic_switch_msr(vmx, MSR_IA32_XSS); break; case MSR_TSC_AUX: - if (!vmx->rdtscp_enabled) + if (!guest_cpuid_has_rdtscp(vcpu)) return 1; /* Check reserved bit, higher 32 bits should be zero */ if ((data >> 32) != 0) @@ -8682,16 +8680,13 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu) struct vcpu_vmx *vmx = to_vmx(vcpu); u32 secondary_exec_ctl = vmx_secondary_exec_control(vmx); - vmx->rdtscp_enabled = false; if (vmx_rdtscp_supported()) { - best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); - if (best && (best->edx & bit(X86_FEATURE_RDTSCP))) - vmx->rdtscp_enabled = true; - else + bool rdtscp_enabled = guest_cpuid_has_rdtscp(vcpu); + if (!rdtscp_enabled) secondary_exec_ctl &= ~SECONDARY_EXEC_RDTSCP; if (nested) { - if (vmx->rdtscp_enabled) + if (rdtscp_enabled) vmx->nested.nested_vmx_secondary_ctls_high |= SECONDARY_EXEC_RDTSCP; else |