Add a testcase for running a guest with no memslots to the memory region
test. The expected result on x86_64 is that the guest will trigger an
internal KVM error due to the initial code fetch encountering a
non-existent memslot and resulting in an emulation failure.
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
.../kvm/x86_64/set_memory_region_test.c | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c b/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c
index b556024af683..c274ce6b4ba2 100644
--- a/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c
+++ b/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c
@@ -289,6 +289,28 @@ static void test_delete_memory_region(void)
kvm_vm_free(vm);
}
+static void test_zero_memory_regions(void)
+{
+ struct kvm_run *run;
+ struct kvm_vm *vm;
+
+ pr_info("Testing KVM_RUN with zero added memory regions\n");
+
+ vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
+ vm_vcpu_add(vm, VCPU_ID);
+
+ TEST_ASSERT(!ioctl(vm_get_fd(vm), KVM_SET_NR_MMU_PAGES, 64),
+ "KVM_SET_NR_MMU_PAGES failed, errno = %d\n", errno);
+
+ vcpu_run(vm, VCPU_ID);
+
+ run = vcpu_state(vm, VCPU_ID);
+ TEST_ASSERT(run->exit_reason == KVM_EXIT_INTERNAL_ERROR,
+ "Unexpected exit_reason = %u\n", run->exit_reason);
+
+ kvm_vm_free(vm);
+}
+
int main(int argc, char *argv[])
{
int i, loops;
@@ -296,6 +318,8 @@ int main(int argc, char *argv[])
/* Tell stdout not to buffer its content */
setbuf(stdout, NULL);
+ test_zero_memory_regions();
+
if (argc > 1)
loops = atoi(argv[1]);
else
--
2.26.0
