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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Test that KVM_SET_BOOT_CPU_ID works as intended
*
* Copyright (C) 2020, Red Hat, Inc.
*/
#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"
#include "apic.h"
static void guest_bsp_vcpu(void *arg)
{
GUEST_SYNC(1);
GUEST_ASSERT_NE(get_bsp_flag(), 0);
GUEST_DONE();
}
static void guest_not_bsp_vcpu(void *arg)
{
GUEST_SYNC(1);
GUEST_ASSERT_EQ(get_bsp_flag(), 0);
GUEST_DONE();
}
static void test_set_invalid_bsp(struct kvm_vm *vm)
{
unsigned long max_vcpu_id = vm_check_cap(vm, KVM_CAP_MAX_VCPU_ID);
int r;
if (max_vcpu_id) {
r = __vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(max_vcpu_id + 1));
TEST_ASSERT(r == -1 && errno == EINVAL, "BSP with ID > MAX should fail");
}
r = __vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(1L << 32));
TEST_ASSERT(r == -1 && errno == EINVAL, "BSP with ID[63:32]!=0 should fail");
}
static void test_set_bsp_busy(struct kvm_vcpu *vcpu, const char *msg)
{
int r = __vm_ioctl(vcpu->vm, KVM_SET_BOOT_CPU_ID,
(void *)(unsigned long)vcpu->id);
TEST_ASSERT(r == -1 && errno == EBUSY, "KVM_SET_BOOT_CPU_ID set %s", msg);
}
static void run_vcpu(struct kvm_vcpu *vcpu)
{
struct ucall uc;
int stage;
for (stage = 0; stage < 2; stage++) {
vcpu_run(vcpu);
switch (get_ucall(vcpu, &uc)) {
case UCALL_SYNC:
TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") &&
uc.args[1] == stage + 1,
"Stage %d: Unexpected register values vmexit, got %lx",
stage + 1, (ulong)uc.args[1]);
test_set_bsp_busy(vcpu, "while running vm");
break;
case UCALL_DONE:
TEST_ASSERT(stage == 1,
"Expected GUEST_DONE in stage 2, got stage %d",
stage);
break;
case UCALL_ABORT:
REPORT_GUEST_ASSERT(uc);
default:
TEST_ASSERT(false, "Unexpected exit: %s",
exit_reason_str(vcpu->run->exit_reason));
}
}
}
static struct kvm_vm *create_vm(uint32_t nr_vcpus, uint32_t bsp_vcpu_id,
struct kvm_vcpu *vcpus[])
{
struct kvm_vm *vm;
uint32_t i;
vm = vm_create(nr_vcpus);
test_set_invalid_bsp(vm);
vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(unsigned long)bsp_vcpu_id);
for (i = 0; i < nr_vcpus; i++)
vcpus[i] = vm_vcpu_add(vm, i, i == bsp_vcpu_id ? guest_bsp_vcpu :
guest_not_bsp_vcpu);
return vm;
}
static void run_vm_bsp(uint32_t bsp_vcpu_id)
{
struct kvm_vcpu *vcpus[2];
struct kvm_vm *vm;
vm = create_vm(ARRAY_SIZE(vcpus), bsp_vcpu_id, vcpus);
run_vcpu(vcpus[0]);
run_vcpu(vcpus[1]);
kvm_vm_free(vm);
}
static void check_set_bsp_busy(void)
{
struct kvm_vcpu *vcpus[2];
struct kvm_vm *vm;
vm = create_vm(ARRAY_SIZE(vcpus), 0, vcpus);
test_set_bsp_busy(vcpus[1], "after adding vcpu");
run_vcpu(vcpus[0]);
run_vcpu(vcpus[1]);
test_set_bsp_busy(vcpus[1], "to a terminated vcpu");
kvm_vm_free(vm);
}
int main(int argc, char *argv[])
{
TEST_REQUIRE(kvm_has_cap(KVM_CAP_SET_BOOT_CPU_ID));
run_vm_bsp(0);
run_vm_bsp(1);
run_vm_bsp(0);
check_set_bsp_busy();
}
|
