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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * svm_vmcall_test4 *5 * Copyright (C) 2020, Red Hat, Inc.6 *7 * Nested SVM testing: VMCALL8 */9 10#include "test_util.h"11#include "kvm_util.h"12#include "processor.h"13#include "svm_util.h"14 15static void l2_guest_code(struct svm_test_data *svm)16{17 __asm__ __volatile__("vmcall");18}19 20static void l1_guest_code(struct svm_test_data *svm)21{22 #define L2_GUEST_STACK_SIZE 6423 unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];24 struct vmcb *vmcb = svm->vmcb;25 26 /* Prepare for L2 execution. */27 generic_svm_setup(svm, l2_guest_code,28 &l2_guest_stack[L2_GUEST_STACK_SIZE]);29 30 run_guest(vmcb, svm->vmcb_gpa);31 32 GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);33 GUEST_DONE();34}35 36int main(int argc, char *argv[])37{38 struct kvm_vcpu *vcpu;39 vm_vaddr_t svm_gva;40 struct kvm_vm *vm;41 42 TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM));43 44 vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);45 46 vcpu_alloc_svm(vm, &svm_gva);47 vcpu_args_set(vcpu, 1, svm_gva);48 49 for (;;) {50 struct ucall uc;51 52 vcpu_run(vcpu);53 TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);54 55 switch (get_ucall(vcpu, &uc)) {56 case UCALL_ABORT:57 REPORT_GUEST_ASSERT(uc);58 /* NOT REACHED */59 case UCALL_SYNC:60 break;61 case UCALL_DONE:62 goto done;63 default:64 TEST_FAIL("Unknown ucall 0x%lx.", uc.cmd);65 }66 }67done:68 kvm_vm_free(vm);69 return 0;70}71