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Subject[PATCH v2 7/7] KVM: selftests: test KVM_GET_SUPPORTED_HV_CPUID as a system ioctl
Date
KVM_GET_SUPPORTED_HV_CPUID is now supported as both vCPU and VM ioctl,
test that.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
.../testing/selftests/kvm/include/kvm_util.h | 2 +
tools/testing/selftests/kvm/lib/kvm_util.c | 26 +++++++++++
.../selftests/kvm/x86_64/hyperv_cpuid.c | 46 +++++++++++++------
3 files changed, 59 insertions(+), 15 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 919e161dd289..59482e4eb308 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -112,6 +112,8 @@ void vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
int _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
void *arg);
void vm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
+void kvm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
+int _kvm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags);
void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa);
void vm_mem_region_delete(struct kvm_vm *vm, uint32_t slot);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 74776ee228f2..d49e24a15836 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1518,6 +1518,32 @@ void vm_ioctl(struct kvm_vm *vm, unsigned long cmd, void *arg)
cmd, ret, errno, strerror(errno));
}

+/*
+ * KVM system ioctl
+ *
+ * Input Args:
+ * vm - Virtual Machine
+ * cmd - Ioctl number
+ * arg - Argument to pass to the ioctl
+ *
+ * Return: None
+ *
+ * Issues an arbitrary ioctl on a KVM fd.
+ */
+void kvm_ioctl(struct kvm_vm *vm, unsigned long cmd, void *arg)
+{
+ int ret;
+
+ ret = ioctl(vm->kvm_fd, cmd, arg);
+ TEST_ASSERT(ret == 0, "KVM ioctl %lu failed, rc: %i errno: %i (%s)",
+ cmd, ret, errno, strerror(errno));
+}
+
+int _kvm_ioctl(struct kvm_vm *vm, unsigned long cmd, void *arg)
+{
+ return ioctl(vm->kvm_fd, cmd, arg);
+}
+
/*
* VM Dump
*
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
index 8b24cb2e6a19..414b7587f0f9 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c
@@ -102,20 +102,23 @@ static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries)

}

-void test_hv_cpuid_e2big(struct kvm_vm *vm)
+void test_hv_cpuid_e2big(struct kvm_vm *vm, bool system)
{
static struct kvm_cpuid2 cpuid = {.nent = 0};
int ret;

- ret = _vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, &cpuid);
+ if (!system)
+ ret = _vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, &cpuid);
+ else
+ ret = _kvm_ioctl(vm, KVM_GET_SUPPORTED_HV_CPUID, &cpuid);

TEST_ASSERT(ret == -1 && errno == E2BIG,
- "KVM_GET_SUPPORTED_HV_CPUID didn't fail with -E2BIG when"
- " it should have: %d %d", ret, errno);
+ "%s KVM_GET_SUPPORTED_HV_CPUID didn't fail with -E2BIG when"
+ " it should have: %d %d", system ? "KVM" : "vCPU", ret, errno);
}


-struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(struct kvm_vm *vm)
+struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(struct kvm_vm *vm, bool system)
{
int nent = 20; /* should be enough */
static struct kvm_cpuid2 *cpuid;
@@ -129,7 +132,10 @@ struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(struct kvm_vm *vm)

cpuid->nent = nent;

- vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, cpuid);
+ if (!system)
+ vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, cpuid);
+ else
+ kvm_ioctl(vm, KVM_GET_SUPPORTED_HV_CPUID, cpuid);

return cpuid;
}
@@ -150,22 +156,32 @@ int main(int argc, char *argv[])
exit(KSFT_SKIP);
}

- for (stage = 0; stage < 2; stage++) {
+ vm = vm_create_default(VCPU_ID, 0, guest_code);
+
+ for (stage = 0; stage < 4; stage++) {
+ bool do_sys_ioctl = stage > 1;
+
+ /* Stages 0/1 test vCPU ioctl, stages 2/3 system ioctl */
+ if (do_sys_ioctl && !kvm_check_cap(KVM_CAP_SYS_HYPERV_CPUID)) {
+ print_skip("KVM_CAP_SYS_HYPERV_CPUID not supported");
+ break;
+ }

- vm = vm_create_default(VCPU_ID, 0, guest_code);
switch (stage) {
case 0:
- test_hv_cpuid_e2big(vm);
- continue;
+ case 2:
+ test_hv_cpuid_e2big(vm, do_sys_ioctl);
+ break;
case 1:
+ case 3:
+ hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm, do_sys_ioctl);
+ test_hv_cpuid(hv_cpuid_entries);
+ free(hv_cpuid_entries);
break;
}
-
- hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm);
- test_hv_cpuid(hv_cpuid_entries);
- free(hv_cpuid_entries);
- kvm_vm_free(vm);
}

+ kvm_vm_free(vm);
+
return 0;
}
--
2.25.4
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