diff options
Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/vmx_msrs_test.c')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/vmx_msrs_test.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_msrs_test.c b/tools/testing/selftests/kvm/x86_64/vmx_msrs_test.c index 322d561b4260..90720b6205f4 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_msrs_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_msrs_test.c @@ -67,6 +67,52 @@ static void vmx_save_restore_msrs_test(struct kvm_vcpu *vcpu) vmx_fixed1_msr_test(vcpu, MSR_IA32_VMX_VMFUNC, -1ull); } +static void __ia32_feature_control_msr_test(struct kvm_vcpu *vcpu, + uint64_t msr_bit, + struct kvm_x86_cpu_feature feature) +{ + uint64_t val; + + vcpu_clear_cpuid_feature(vcpu, feature); + + val = vcpu_get_msr(vcpu, MSR_IA32_FEAT_CTL); + vcpu_set_msr(vcpu, MSR_IA32_FEAT_CTL, val | msr_bit | FEAT_CTL_LOCKED); + vcpu_set_msr(vcpu, MSR_IA32_FEAT_CTL, (val & ~msr_bit) | FEAT_CTL_LOCKED); + vcpu_set_msr(vcpu, MSR_IA32_FEAT_CTL, val | msr_bit | FEAT_CTL_LOCKED); + vcpu_set_msr(vcpu, MSR_IA32_FEAT_CTL, (val & ~msr_bit) | FEAT_CTL_LOCKED); + vcpu_set_msr(vcpu, MSR_IA32_FEAT_CTL, val); + + if (!kvm_cpu_has(feature)) + return; + + vcpu_set_cpuid_feature(vcpu, feature); +} + +static void ia32_feature_control_msr_test(struct kvm_vcpu *vcpu) +{ + uint64_t supported_bits = FEAT_CTL_LOCKED | + FEAT_CTL_VMX_ENABLED_INSIDE_SMX | + FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX | + FEAT_CTL_SGX_LC_ENABLED | + FEAT_CTL_SGX_ENABLED | + FEAT_CTL_LMCE_ENABLED; + int bit, r; + + __ia32_feature_control_msr_test(vcpu, FEAT_CTL_VMX_ENABLED_INSIDE_SMX, X86_FEATURE_SMX); + __ia32_feature_control_msr_test(vcpu, FEAT_CTL_VMX_ENABLED_INSIDE_SMX, X86_FEATURE_VMX); + __ia32_feature_control_msr_test(vcpu, FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX, X86_FEATURE_VMX); + __ia32_feature_control_msr_test(vcpu, FEAT_CTL_SGX_LC_ENABLED, X86_FEATURE_SGX_LC); + __ia32_feature_control_msr_test(vcpu, FEAT_CTL_SGX_LC_ENABLED, X86_FEATURE_SGX); + __ia32_feature_control_msr_test(vcpu, FEAT_CTL_SGX_ENABLED, X86_FEATURE_SGX); + __ia32_feature_control_msr_test(vcpu, FEAT_CTL_LMCE_ENABLED, X86_FEATURE_MCE); + + for_each_clear_bit(bit, &supported_bits, 64) { + r = _vcpu_set_msr(vcpu, MSR_IA32_FEAT_CTL, BIT(bit)); + TEST_ASSERT(r == 0, + "Setting reserved bit %d in IA32_FEATURE_CONTROL should fail", bit); + } +} + int main(void) { struct kvm_vcpu *vcpu; @@ -79,6 +125,7 @@ int main(void) vm = vm_create_with_one_vcpu(&vcpu, NULL); vmx_save_restore_msrs_test(vcpu); + ia32_feature_control_msr_test(vcpu); kvm_vm_free(vm); } |