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Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c')
-rw-r--r--tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
new file mode 100644
index 000000000000..e280f68f6365
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * svm_vmcall_test
+ *
+ * Copyright (C) 2020, Red Hat, Inc.
+ *
+ * Nested SVM testing: VMCALL
+ */
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "processor.h"
+#include "svm_util.h"
+
+#define VCPU_ID 5
+
+static struct kvm_vm *vm;
+
+static void l2_guest_code(struct svm_test_data *svm)
+{
+ __asm__ __volatile__("vmcall");
+}
+
+static void l1_guest_code(struct svm_test_data *svm)
+{
+ #define L2_GUEST_STACK_SIZE 64
+ unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
+ struct vmcb *vmcb = svm->vmcb;
+
+ /* Prepare for L2 execution. */
+ generic_svm_setup(svm, l2_guest_code,
+ &l2_guest_stack[L2_GUEST_STACK_SIZE]);
+
+ run_guest(vmcb, svm->vmcb_gpa);
+
+ GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
+ GUEST_DONE();
+}
+
+int main(int argc, char *argv[])
+{
+ vm_vaddr_t svm_gva;
+
+ nested_svm_check_supported();
+
+ vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
+ vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
+
+ vcpu_alloc_svm(vm, &svm_gva);
+ vcpu_args_set(vm, VCPU_ID, 1, svm_gva);
+
+ for (;;) {
+ volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
+ struct ucall uc;
+
+ vcpu_run(vm, VCPU_ID);
+ TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
+ "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
+ run->exit_reason,
+ exit_reason_str(run->exit_reason));
+
+ switch (get_ucall(vm, VCPU_ID, &uc)) {
+ case UCALL_ABORT:
+ TEST_ASSERT(false, "%s",
+ (const char *)uc.args[0]);
+ /* NOT REACHED */
+ case UCALL_SYNC:
+ break;
+ case UCALL_DONE:
+ goto done;
+ default:
+ TEST_ASSERT(false,
+ "Unknown ucall 0x%x.", uc.cmd);
+ }
+ }
+done:
+ kvm_vm_free(vm);
+ return 0;
+}