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KVM: selftests: Add "zero" testcase to set_memory_region_test 

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@intel.com>
Message-Id: <20200410231707.7128-9-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2020-04-10 16:17:05 -07:00 committed by Paolo Bonzini
parent 4cd94d125d
commit 8cc2dd637b
1 changed files with 24 additions and 0 deletions
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24
tools/testing/selftests/kvm/x86_64/set_memory_region_test.c
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@ -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