Commit 2f6fcfa1 authored by Peter Gonda's avatar Peter Gonda Committed by Sean Christopherson
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KVM: selftests: Add SEV-ES shutdown test 



Regression test for ae20eef5 ("KVM: SVM: Update SEV-ES shutdown intercepts
with more metadata"). Test confirms userspace is correctly indicated of
a guest shutdown not previous behavior of an EINVAL from KVM_RUN.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Alper Gun <alpergun@google.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Michael Roth <michael.roth@amd.com>
Cc: kvm@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: default avatarPeter Gonda <pgonda@google.com>
Tested-by: default avatarPratik R. Sampat <pratikrajesh.sampat@amd.com>
Link: https://lore.kernel.org/r/20240709182936.146487-1-pgonda@google.com


[sean: clobber IDT to ensure #UD leads to SHUTDOWN]
Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent c0d1a39d

tools/testing/selftests/kvm/x86_64/sev_smoke_test.c

+32 −0
Original line number Diff line number Diff line
@@ -160,6 +160,36 @@ static void test_sev(void *guest_code, uint64_t policy) 
	kvm_vm_free(vm);

}



static void guest_shutdown_code(void)

{

	struct desc_ptr idt;



	/* Clobber the IDT so that #UD is guaranteed to trigger SHUTDOWN. */

	memset(&idt, 0, sizeof(idt));

	__asm__ __volatile__("lidt %0" :: "m"(idt));



	__asm__ __volatile__("ud2");

}



static void test_sev_es_shutdown(void)

{

	struct kvm_vcpu *vcpu;

	struct kvm_vm *vm;



	uint32_t type = KVM_X86_SEV_ES_VM;



	vm = vm_sev_create_with_one_vcpu(type, guest_shutdown_code, &vcpu);



	vm_sev_launch(vm, SEV_POLICY_ES, NULL);



	vcpu_run(vcpu);

	TEST_ASSERT(vcpu->run->exit_reason == KVM_EXIT_SHUTDOWN,

		    "Wanted SHUTDOWN, got %s",

		    exit_reason_str(vcpu->run->exit_reason));



	kvm_vm_free(vm);

}



int main(int argc, char *argv[])

{

	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SEV));
@@ -171,6 +201,8 @@ int main(int argc, char *argv[]) 
		test_sev(guest_sev_es_code, SEV_POLICY_ES | SEV_POLICY_NO_DBG);

		test_sev(guest_sev_es_code, SEV_POLICY_ES);



		test_sev_es_shutdown();



		if (kvm_has_cap(KVM_CAP_XCRS) &&

		    (xgetbv(0) & XFEATURE_MASK_X87_AVX) == XFEATURE_MASK_X87_AVX) {

			test_sync_vmsa(0);