As the similar kvm_get_supported_cpuid(), kvm_get_emulated_cpuid allocates and gets a struct kvm_cpuid2 filled with emulated features.
Signed-off-by: Emanuele Giuseppe Esposito eesposit@redhat.com --- .../selftests/kvm/include/x86_64/processor.h | 1 + .../selftests/kvm/lib/x86_64/processor.c | 33 +++++++++++++++++++ 2 files changed, 34 insertions(+)
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index 0b30b4e15c38..ae1b9530e187 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -353,6 +353,7 @@ void vcpu_load_state(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_msr_list *kvm_get_msr_index_list(void); uint64_t kvm_get_feature_msr(uint64_t msr_index); struct kvm_cpuid2 *kvm_get_supported_cpuid(void); +struct kvm_cpuid2 *kvm_get_emulated_cpuid(void);
struct kvm_cpuid2 *vcpu_get_cpuid(struct kvm_vm *vm, uint32_t vcpuid); void vcpu_set_cpuid(struct kvm_vm *vm, uint32_t vcpuid, diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index e676fe40bfe6..2ea14421bdfe 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -669,6 +669,39 @@ struct kvm_cpuid2 *kvm_get_supported_cpuid(void) return cpuid; }
+/* + * KVM Emulated CPUID Get + * + * Input Args: None + * + * Output Args: + * + * Return: The emulated KVM CPUID + * + * Get the guest CPUID emulated by KVM. + */ +struct kvm_cpuid2 *kvm_get_emulated_cpuid(void) +{ + static struct kvm_cpuid2 *cpuid; + int ret; + int kvm_fd; + + if (cpuid) + return cpuid; + + cpuid = allocate_kvm_cpuid2(); + kvm_fd = open(KVM_DEV_PATH, O_RDONLY); + if (kvm_fd < 0) + exit(KSFT_SKIP); + + ret = ioctl(kvm_fd, KVM_GET_EMULATED_CPUID, cpuid); + TEST_ASSERT(ret == 0, "KVM_GET_EMULATED_CPUID failed %d %d\n", + ret, errno); + + close(kvm_fd); + return cpuid; +} + /* * KVM Get MSR *