diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/x86_64/processor.c')
-rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/processor.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 66926a7f29cc..5a15264c2ef2 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -704,6 +704,48 @@ uint64_t kvm_get_feature_msr(uint64_t msr_index) } /* + * VM VCPU CPUID Set + * + * Input Args: + * vm - Virtual Machine + * vcpuid - VCPU id + * + * Output Args: None + * + * Return: KVM CPUID (KVM_GET_CPUID2) + * + * Set the VCPU's CPUID. + */ +struct kvm_cpuid2 *vcpu_get_cpuid(struct kvm_vm *vm, uint32_t vcpuid) +{ + struct vcpu *vcpu = vcpu_find(vm, vcpuid); + struct kvm_cpuid2 *cpuid; + int rc, max_ent; + + TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid); + + cpuid = allocate_kvm_cpuid2(); + max_ent = cpuid->nent; + + for (cpuid->nent = 1; cpuid->nent <= max_ent; cpuid->nent++) { + rc = ioctl(vcpu->fd, KVM_GET_CPUID2, cpuid); + if (!rc) + break; + + TEST_ASSERT(rc == -1 && errno == E2BIG, + "KVM_GET_CPUID2 should either succeed or give E2BIG: %d %d", + rc, errno); + } + + TEST_ASSERT(rc == 0, "KVM_GET_CPUID2 failed, rc: %i errno: %i", + rc, errno); + + return cpuid; +} + + + +/* * Locate a cpuid entry. * * Input Args: |