1 files changed, 42 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
new file mode 100644
index 000000000000..6c2e5e0ceb1f
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2022, Google LLC.
+ *
+ * Test for KVM_CAP_EXIT_ON_EMULATION_FAILURE.
+ */
+
+#define _GNU_SOURCE /* for program_invocation_short_name */
+
+#include "flds_emulation.h"
+
+#include "test_util.h"
+
+#define MMIO_GPA	0x700000000
+#define MMIO_GVA	MMIO_GPA
+
+static void guest_code(void)
+{
+	/* Execute flds with an MMIO address to force KVM to emulate it. */
+	flds(MMIO_GVA);
+	GUEST_DONE();
+}
+
+int main(int argc, char *argv[])
+{
+	struct kvm_vcpu *vcpu;
+	struct kvm_vm *vm;
+
+	TEST_REQUIRE(kvm_has_cap(KVM_CAP_EXIT_ON_EMULATION_FAILURE));
+
+	vm = vm_create_with_one_vcpu(&vcpu, guest_code);
+	vm_enable_cap(vm, KVM_CAP_EXIT_ON_EMULATION_FAILURE, 1);
+	virt_map(vm, MMIO_GVA, MMIO_GPA, 1);
+
+	vcpu_run(vcpu);
+	handle_flds_emulation_failure_exit(vcpu);
+	vcpu_run(vcpu);
+	TEST_ASSERT_EQ(get_ucall(vcpu, NULL), UCALL_DONE);
+
+	kvm_vm_free(vm);
+	return 0;
+}