1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2022 Oxide Computer Company
14 */
15
16 #include <stdio.h>
17 #include <unistd.h>
18 #include <stdlib.h>
19 #include <strings.h>
20 #include <libgen.h>
21 #include <assert.h>
22 #include <errno.h>
23
24 #include <sys/types.h>
25 #include <sys/sysmacros.h>
26 #include <sys/debug.h>
27 #include <sys/vmm.h>
28 #include <sys/vmm_dev.h>
29 #include <vmmapi.h>
30
31 #include "in_guest.h"
32 #include "test_defs.h"
33
34 const char *strict_name = "STRICT_APICV";
35
36 static bool
strict_apicv(void)37 strict_apicv(void)
38 {
39 const char *strict_val;
40
41 if ((strict_val = getenv(strict_name)) != NULL) {
42 if (strlen(strict_val) != 0 &&
43 strcmp(strict_val, "0") != 0) {
44 return (true);
45 }
46 }
47 return (false);
48 }
49
50 int
main(int argc,char * argv[])51 main(int argc, char *argv[])
52 {
53 const char *test_suite_name = basename(argv[0]);
54 struct vmctx *ctx = NULL;
55 struct vcpu *vcpu;
56 int err;
57
58 ctx = test_initialize(test_suite_name);
59
60 if ((vcpu = vm_vcpu_open(ctx, 0)) == NULL) {
61 test_fail_errno(errno, "Could not open vcpu0");
62 }
63
64 err = test_setup_vcpu(vcpu, MEM_LOC_PAYLOAD, MEM_LOC_STACK);
65 if (err != 0) {
66 test_fail_errno(err, "Could not initialize vcpu0");
67 }
68
69 /*
70 * Although x2APIC should be off by default, make doubly sure by
71 * explicitly setting it so.
72 */
73 err = vm_set_x2apic_state(vcpu, X2APIC_DISABLED);
74 if (err != 0) {
75 test_fail_errno(err, "Could not disable x2apic on vcpu0");
76 }
77
78 struct vm_entry ventry = { 0 };
79 struct vm_exit vexit = { 0 };
80
81 do {
82 const enum vm_exit_kind kind =
83 test_run_vcpu(vcpu, &ventry, &vexit);
84 switch (kind) {
85 case VEK_REENTR:
86 break;
87 case VEK_TEST_PASS:
88 test_pass();
89 break;
90 case VEK_TEST_FAIL:
91 test_fail_msg("payload signaled failure");
92 break;
93 case VEK_UNHANDLED:
94 /*
95 * Not all APICv-accelerated accesses are properly
96 * handled by the in-kernel emulation today.
97 * (See: illumos #13847).
98 *
99 * To allow this test to be useful on systems without
100 * APICv, we suppress such failures unless explicitly
101 * strict handling is requested.
102 */
103 if (vexit.exitcode == VM_EXITCODE_VMX &&
104 (vexit.u.vmx.exit_reason == 44 ||
105 vexit.u.vmx.exit_reason == 56)) {
106 if (strict_apicv()) {
107 test_fail_vmexit(&vexit);
108 }
109 (void) fprintf(stderr,
110 "Ignoring APICv access issue\n"
111 "If strictness is desired, "
112 "run with %s=1 in env\n", strict_name);
113 test_pass();
114 }
115 test_fail_vmexit(&vexit);
116 break;
117 default:
118 test_fail_vmexit(&vexit);
119 break;
120 }
121 } while (true);
122 }
123