1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// SPDX-License-Identifier: GPL-2.0
/*
* Test for x86 KVM_CAP_HYPERV_CPUID
*
* Copyright (C) 2018, Red Hat, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2.
*
*/
#define _GNU_SOURCE /* for program_invocation_short_name */
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include "test_util.h"
#include "kvm_util.h"
#include "processor.h"
#define VCPU_ID 0
static void guest_code(void)
{
}
static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries,
int evmcs_enabled)
{
int i;
if (!evmcs_enabled)
TEST_ASSERT(hv_cpuid_entries->nent == 6,
"KVM_GET_SUPPORTED_HV_CPUID should return 6 entries"
" when Enlightened VMCS is disabled (returned %d)",
hv_cpuid_entries->nent);
else
TEST_ASSERT(hv_cpuid_entries->nent == 7,
"KVM_GET_SUPPORTED_HV_CPUID should return 7 entries"
" when Enlightened VMCS is enabled (returned %d)",
hv_cpuid_entries->nent);
for (i = 0; i < hv_cpuid_entries->nent; i++) {
struct kvm_cpuid_entry2 *entry = &hv_cpuid_entries->entries[i];
TEST_ASSERT((entry->function >= 0x40000000) &&
(entry->function <= 0x4000000A),
"function %lx is our of supported range",
entry->function);
TEST_ASSERT(entry->index == 0,
".index field should be zero");
TEST_ASSERT(entry->flags == 0,
".flags field should be zero");
TEST_ASSERT(!entry->padding[0] && !entry->padding[1] &&
!entry->padding[2], "padding should be zero");
/*
* If needed for debug:
* fprintf(stdout,
* "CPUID%lx EAX=0x%lx EBX=0x%lx ECX=0x%lx EDX=0x%lx\n",
* entry->function, entry->eax, entry->ebx, entry->ecx,
* entry->edx);
*/
}
}
void test_hv_cpuid_e2big(struct kvm_vm *vm)
{
static struct kvm_cpuid2 cpuid = {.nent = 0};
int ret;
ret = _vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, &cpuid);
TEST_ASSERT(ret == -1 && errno == E2BIG,
"KVM_GET_SUPPORTED_HV_CPUID didn't fail with -E2BIG when"
" it should have: %d %d", ret, errno);
}
struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(struct kvm_vm *vm)
{
int nent = 20; /* should be enough */
static struct kvm_cpuid2 *cpuid;
cpuid = malloc(sizeof(*cpuid) + nent * sizeof(struct kvm_cpuid_entry2));
if (!cpuid) {
perror("malloc");
abort();
}
cpuid->nent = nent;
vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, cpuid);
return cpuid;
}
int main(int argc, char *argv[])
{
struct kvm_vm *vm;
int rv;
uint16_t evmcs_ver;
struct kvm_cpuid2 *hv_cpuid_entries;
struct kvm_enable_cap enable_evmcs_cap = {
.cap = KVM_CAP_HYPERV_ENLIGHTENED_VMCS,
.args[0] = (unsigned long)&evmcs_ver
};
/* Tell stdout not to buffer its content */
setbuf(stdout, NULL);
rv = kvm_check_cap(KVM_CAP_HYPERV_CPUID);
if (!rv) {
fprintf(stderr,
"KVM_CAP_HYPERV_CPUID not supported, skip test\n");
exit(KSFT_SKIP);
}
/* Create VM */
vm = vm_create_default(VCPU_ID, 0, guest_code);
test_hv_cpuid_e2big(vm);
hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm);
if (!hv_cpuid_entries)
return 1;
test_hv_cpuid(hv_cpuid_entries, 0);
free(hv_cpuid_entries);
rv = _vcpu_ioctl(vm, VCPU_ID, KVM_ENABLE_CAP, &enable_evmcs_cap);
if (rv) {
fprintf(stderr,
"Enlightened VMCS is unsupported, skip related test\n");
goto vm_free;
}
hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm);
if (!hv_cpuid_entries)
return 1;
test_hv_cpuid(hv_cpuid_entries, 1);
free(hv_cpuid_entries);
vm_free:
kvm_vm_free(vm);
return 0;
}
|
