1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * svm_vmcall_test 4 * 5 * Copyright (C) 2020, Red Hat, Inc. 6 * 7 * Nested SVM testing: VMCALL 8 */ 9 10 #include "test_util.h" 11 #include "kvm_util.h" 12 #include "processor.h" 13 #include "svm_util.h" 14 15 static void l2_guest_code(struct svm_test_data *svm) 16 { 17 __asm__ __volatile__("vmcall"); 18 } 19 20 static void l1_guest_code(struct svm_test_data *svm) 21 { 22 struct vmcb *vmcb = svm->vmcb; 23 24 /* Prepare for L2 execution. */ 25 generic_svm_setup(svm, l2_guest_code); 26 27 run_guest(vmcb, svm->vmcb_gpa); 28 29 GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL); 30 GUEST_DONE(); 31 } 32 33 int main(int argc, char *argv[]) 34 { 35 struct kvm_vcpu *vcpu; 36 gva_t svm_gva; 37 struct kvm_vm *vm; 38 39 TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM)); 40 41 vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code); 42 43 vcpu_alloc_svm(vm, &svm_gva); 44 vcpu_args_set(vcpu, 1, svm_gva); 45 46 for (;;) { 47 struct ucall uc; 48 49 vcpu_run(vcpu); 50 TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO); 51 52 switch (get_ucall(vcpu, &uc)) { 53 case UCALL_ABORT: 54 REPORT_GUEST_ASSERT(uc); 55 /* NOT REACHED */ 56 case UCALL_SYNC: 57 break; 58 case UCALL_DONE: 59 goto done; 60 default: 61 TEST_FAIL("Unknown ucall 0x%lx.", uc.cmd); 62 } 63 } 64 done: 65 kvm_vm_free(vm); 66 return 0; 67 } 68