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selftests: KVM: sev_migrate_tests: Add mirror command tests

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Add tests to confirm mirror vms can only run correct subset of commands.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Marc Orr <marcorr@google.com>
Signed-off-by: Peter Gonda <pgonda@google.com>
Message-Id: <20211208191642.3792819-4-pgonda@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Gonda 2021-12-08 11:16:42 -08:00 committed by Paolo Bonzini
parent 427d046a41
commit a6fec53947
1 changed files with 51 additions and 4 deletions
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55
tools/testing/selftests/kvm/x86_64/sev_migrate_tests.c
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@ -21,7 +21,7 @@
#define NR_LOCK_TESTING_THREADS 3
#define NR_LOCK_TESTING_ITERATIONS 10000
static void sev_ioctl(int vm_fd, int cmd_id, void *data)
static int __sev_ioctl(int vm_fd, int cmd_id, void *data, __u32 *fw_error)
{
struct kvm_sev_cmd cmd = {
.id = cmd_id,
@ -30,11 +30,20 @@ static void sev_ioctl(int vm_fd, int cmd_id, void *data)
};
int ret;
ret = ioctl(vm_fd, KVM_MEMORY_ENCRYPT_OP, &cmd);
TEST_ASSERT(ret == 0 && cmd.error == SEV_RET_SUCCESS,
*fw_error = cmd.error;
return ret;
}
static void sev_ioctl(int vm_fd, int cmd_id, void *data)
{
int ret;
__u32 fw_error;
ret = __sev_ioctl(vm_fd, cmd_id, data, &fw_error);
TEST_ASSERT(ret == 0 && fw_error == SEV_RET_SUCCESS,
"%d failed: return code: %d, errno: %d, fw error: %d",
cmd_id, ret, errno, cmd.error);
cmd_id, ret, errno, fw_error);
}
static struct kvm_vm *sev_vm_create(bool es)
@ -226,6 +235,42 @@ static void sev_mirror_create(int dst_fd, int src_fd)
TEST_ASSERT(!ret, "Copying context failed, ret: %d, errno: %d\n", ret, errno);
}
static void verify_mirror_allowed_cmds(int vm_fd)
{
struct kvm_sev_guest_status status;
for (int cmd_id = KVM_SEV_INIT; cmd_id < KVM_SEV_NR_MAX; ++cmd_id) {
int ret;
__u32 fw_error;
/*
* These commands are allowed for mirror VMs, all others are
* not.
*/
switch (cmd_id) {
case KVM_SEV_LAUNCH_UPDATE_VMSA:
case KVM_SEV_GUEST_STATUS:
case KVM_SEV_DBG_DECRYPT:
case KVM_SEV_DBG_ENCRYPT:
continue;
default:
break;
}
/*
* These commands should be disallowed before the data
* parameter is examined so NULL is OK here.
*/
ret = __sev_ioctl(vm_fd, cmd_id, NULL, &fw_error);
TEST_ASSERT(
ret == -1 && errno == EINVAL,
"Should not be able call command: %d. ret: %d, errno: %d\n",
cmd_id, ret, errno);
}
sev_ioctl(vm_fd, KVM_SEV_GUEST_STATUS, &status);
}
static void test_sev_mirror(bool es)
{
struct kvm_vm *src_vm, *dst_vm;
@ -243,6 +288,8 @@ static void test_sev_mirror(bool es)
if (es)
sev_ioctl(dst_vm->fd, KVM_SEV_LAUNCH_UPDATE_VMSA, NULL);
verify_mirror_allowed_cmds(dst_vm->fd);
kvm_vm_free(src_vm);
kvm_vm_free(dst_vm);
}