// SPDX-License-Identifier: GPL-2.0-only
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/*
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* svm_vmcall_test
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*
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* Copyright (C) 2020, Red Hat, Inc.
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*
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* Nested SVM testing: VMCALL
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*/
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#include "test_util.h"
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#include "kvm_util.h"
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#include "processor.h"
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#include "svm_util.h"
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#define VCPU_ID 5
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static struct kvm_vm *vm;
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static void l2_guest_code(struct svm_test_data *svm)
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{
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__asm__ __volatile__("vmcall");
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}
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static void l1_guest_code(struct svm_test_data *svm)
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{
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#define L2_GUEST_STACK_SIZE 64
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unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
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struct vmcb *vmcb = svm->vmcb;
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/* Prepare for L2 execution. */
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generic_svm_setup(svm, l2_guest_code,
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&l2_guest_stack[L2_GUEST_STACK_SIZE]);
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run_guest(vmcb, svm->vmcb_gpa);
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GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
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GUEST_DONE();
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}
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int main(int argc, char *argv[])
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{
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vm_vaddr_t svm_gva;
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nested_svm_check_supported();
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vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
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vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
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vcpu_alloc_svm(vm, &svm_gva);
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vcpu_args_set(vm, VCPU_ID, 1, svm_gva);
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for (;;) {
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volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
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struct ucall uc;
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vcpu_run(vm, VCPU_ID);
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TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
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"Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
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run->exit_reason,
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exit_reason_str(run->exit_reason));
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switch (get_ucall(vm, VCPU_ID, &uc)) {
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case UCALL_ABORT:
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TEST_FAIL("%s", (const char *)uc.args[0]);
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/* NOT REACHED */
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case UCALL_SYNC:
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break;
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case UCALL_DONE:
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goto done;
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default:
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TEST_FAIL("Unknown ucall 0x%lx.", uc.cmd);
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}
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}
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done:
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kvm_vm_free(vm);
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return 0;
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}
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