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selftests: sev_migrate_tests: add tests for KVM_CAP_VM_COPY_ENC_CONTEXT_FROM 

I am putting the tests in sev_migrate_tests because the failure conditions are
very similar and some of the setup code can be reused, too.

The tests cover both successful creation of a mirror VM, and error
conditions.

Cc: Peter Gonda <pgonda@google.com>
Cc: Sean Christopherson <seanjc@google.com>
Message-Id: <20211123005036.2954379-9-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-11-22 19:50:32 -05:00
parent 642525e3bd
commit dc79c9f4eb
1 changed files with 105 additions and 7 deletions
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112
tools/testing/selftests/kvm/x86_64/sev_migrate_tests.c
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@ -54,12 +54,15 @@ static struct kvm_vm *sev_vm_create(bool es)
return vm;
}
static struct kvm_vm *__vm_create(void)
static struct kvm_vm *aux_vm_create(bool with_vcpus)
{
struct kvm_vm *vm;
int i;
vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
if (!with_vcpus)
return vm;
for (i = 0; i < NR_MIGRATE_TEST_VCPUS; ++i)
vm_vcpu_add(vm, i);
@ -93,7 +96,7 @@ static void test_sev_migrate_from(bool es)
src_vm = sev_vm_create(es);
for (i = 0; i < NR_MIGRATE_TEST_VMS; ++i)
dst_vms[i] = __vm_create();
dst_vms[i] = aux_vm_create(true);
/* Initial migration from the src to the first dst. */
sev_migrate_from(dst_vms[0]->fd, src_vm->fd);
@ -162,7 +165,7 @@ static void test_sev_migrate_parameters(void)
sev_vm = sev_vm_create(/* es= */ false);
sev_es_vm = sev_vm_create(/* es= */ true);
vm_no_vcpu = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
vm_no_sev = __vm_create();
vm_no_sev = aux_vm_create(true);
sev_es_vm_no_vmsa = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
sev_ioctl(sev_es_vm_no_vmsa->fd, KVM_SEV_ES_INIT, NULL);
vm_vcpu_add(sev_es_vm_no_vmsa, 1);
@ -203,11 +206,106 @@ static void test_sev_migrate_parameters(void)
kvm_vm_free(vm_no_sev);
}
static int __sev_mirror_create(int dst_fd, int src_fd)
{
struct kvm_enable_cap cap = {
.cap = KVM_CAP_VM_COPY_ENC_CONTEXT_FROM,
.args = { src_fd }
};
return ioctl(dst_fd, KVM_ENABLE_CAP, &cap);
}
static void sev_mirror_create(int dst_fd, int src_fd)
{
int ret;
ret = __sev_mirror_create(dst_fd, src_fd);
TEST_ASSERT(!ret, "Copying context failed, ret: %d, errno: %d\n", ret, errno);
}
static void test_sev_mirror(bool es)
{
struct kvm_vm *src_vm, *dst_vm;
struct kvm_sev_launch_start start = {
.policy = es ? SEV_POLICY_ES : 0
};
int i;
src_vm = sev_vm_create(es);
dst_vm = aux_vm_create(false);
sev_mirror_create(dst_vm->fd, src_vm->fd);
/* Check that we can complete creation of the mirror VM. */
for (i = 0; i < NR_MIGRATE_TEST_VCPUS; ++i)
vm_vcpu_add(dst_vm, i);
sev_ioctl(dst_vm->fd, KVM_SEV_LAUNCH_START, &start);
if (es)
sev_ioctl(dst_vm->fd, KVM_SEV_LAUNCH_UPDATE_VMSA, NULL);
kvm_vm_free(src_vm);
kvm_vm_free(dst_vm);
}
static void test_sev_mirror_parameters(void)
{
struct kvm_vm *sev_vm, *sev_es_vm, *vm_no_vcpu, *vm_with_vcpu;
int ret;
sev_vm = sev_vm_create(/* es= */ false);
sev_es_vm = sev_vm_create(/* es= */ true);
vm_with_vcpu = aux_vm_create(true);
vm_no_vcpu = aux_vm_create(false);
ret = __sev_mirror_create(sev_vm->fd, sev_vm->fd);
TEST_ASSERT(
ret == -1 && errno == EINVAL,
"Should not be able copy context to self. ret: %d, errno: %d\n",
ret, errno);
ret = __sev_mirror_create(sev_vm->fd, sev_es_vm->fd);
TEST_ASSERT(
ret == -1 && errno == EINVAL,
"Should not be able copy context to SEV enabled VM. ret: %d, errno: %d\n",
ret, errno);
ret = __sev_mirror_create(sev_es_vm->fd, sev_vm->fd);
TEST_ASSERT(
ret == -1 && errno == EINVAL,
"Should not be able copy context to SEV-ES enabled VM. ret: %d, errno: %d\n",
ret, errno);
ret = __sev_mirror_create(vm_no_vcpu->fd, vm_with_vcpu->fd);
TEST_ASSERT(ret == -1 && errno == EINVAL,
"Copy context requires SEV enabled. ret %d, errno: %d\n", ret,
errno);
ret = __sev_mirror_create(vm_with_vcpu->fd, sev_vm->fd);
TEST_ASSERT(
ret == -1 && errno == EINVAL,
"SEV copy context requires no vCPUS on the destination. ret: %d, errno: %d\n",
ret, errno);
kvm_vm_free(sev_vm);
kvm_vm_free(sev_es_vm);
kvm_vm_free(vm_with_vcpu);
kvm_vm_free(vm_no_vcpu);
}
int main(int argc, char *argv[])
{
test_sev_migrate_from(/* es= */ false);
test_sev_migrate_from(/* es= */ true);
test_sev_migrate_locking();
test_sev_migrate_parameters();
if (kvm_check_cap(KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM)) {
test_sev_migrate_from(/* es= */ false);
test_sev_migrate_from(/* es= */ true);
test_sev_migrate_locking();
test_sev_migrate_parameters();
}
if (kvm_check_cap(KVM_CAP_VM_COPY_ENC_CONTEXT_FROM)) {
test_sev_mirror(/* es= */ false);
test_sev_mirror(/* es= */ true);
test_sev_mirror_parameters();
}
return 0;
}