1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * svm_nested_shutdown_test
4 *
5 * Copyright (C) 2022, Red Hat, Inc.
6 *
7 * Nested SVM testing: test that unintercepted shutdown in L2 doesn't crash the host
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__("ud2");
18 }
19
20 static void l1_guest_code(struct svm_test_data *svm, struct idt_entry *idt)
21 {
22 #define L2_GUEST_STACK_SIZE 64
23 unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
24 struct vmcb *vmcb = svm->vmcb;
25
26 generic_svm_setup(svm, l2_guest_code,
27 &l2_guest_stack[L2_GUEST_STACK_SIZE]);
28
29 vmcb->control.intercept &= ~(BIT(INTERCEPT_SHUTDOWN));
30
31 idt[6].p = 0; // #UD is intercepted but its injection will cause #NP
32 idt[11].p = 0; // #NP is not intercepted and will cause another
33 // #NP that will be converted to #DF
34 idt[8].p = 0; // #DF will cause #NP which will cause SHUTDOWN
35
36 run_guest(vmcb, svm->vmcb_gpa);
37
38 /* should not reach here */
39 GUEST_ASSERT(0);
40 }
41
42 int main(int argc, char *argv[])
43 {
44 struct kvm_vcpu *vcpu;
45 vm_vaddr_t svm_gva;
46 struct kvm_vm *vm;
47
48 TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM));
49
50 vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
51 vcpu_alloc_svm(vm, &svm_gva);
52
53 vcpu_args_set(vcpu, 2, svm_gva, vm->arch.idt);
54
55 vcpu_run(vcpu);
56 TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_SHUTDOWN);
57
58 kvm_vm_free(vm);
59 }
60
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.