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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
|
// SPDX-License-Identifier: GPL-2.0
/*
* Hyper-V HvCallSendSyntheticClusterIpi{,Ex} tests
*
* Copyright (C) 2022, Red Hat, Inc.
*
*/
#define _GNU_SOURCE /* for program_invocation_short_name */
#include <pthread.h>
#include <inttypes.h>
#include "kvm_util.h"
#include "hyperv.h"
#include "test_util.h"
#include "vmx.h"
#define RECEIVER_VCPU_ID_1 2
#define RECEIVER_VCPU_ID_2 65
#define IPI_VECTOR 0xfe
static volatile uint64_t ipis_rcvd[RECEIVER_VCPU_ID_2 + 1];
struct hv_vpset {
u64 format;
u64 valid_bank_mask;
u64 bank_contents[2];
};
enum HV_GENERIC_SET_FORMAT {
HV_GENERIC_SET_SPARSE_4K,
HV_GENERIC_SET_ALL,
};
/* HvCallSendSyntheticClusterIpi hypercall */
struct hv_send_ipi {
u32 vector;
u32 reserved;
u64 cpu_mask;
};
/* HvCallSendSyntheticClusterIpiEx hypercall */
struct hv_send_ipi_ex {
u32 vector;
u32 reserved;
struct hv_vpset vp_set;
};
static inline void hv_init(vm_vaddr_t pgs_gpa)
{
wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID);
wrmsr(HV_X64_MSR_HYPERCALL, pgs_gpa);
}
static void receiver_code(void *hcall_page, vm_vaddr_t pgs_gpa)
{
u32 vcpu_id;
x2apic_enable();
hv_init(pgs_gpa);
vcpu_id = rdmsr(HV_X64_MSR_VP_INDEX);
/* Signal sender vCPU we're ready */
ipis_rcvd[vcpu_id] = (u64)-1;
for (;;)
asm volatile("sti; hlt; cli");
}
static void guest_ipi_handler(struct ex_regs *regs)
{
u32 vcpu_id = rdmsr(HV_X64_MSR_VP_INDEX);
ipis_rcvd[vcpu_id]++;
wrmsr(HV_X64_MSR_EOI, 1);
}
static inline void nop_loop(void)
{
int i;
for (i = 0; i < 100000000; i++)
asm volatile("nop");
}
static void sender_guest_code(void *hcall_page, vm_vaddr_t pgs_gpa)
{
struct hv_send_ipi *ipi = (struct hv_send_ipi *)hcall_page;
struct hv_send_ipi_ex *ipi_ex = (struct hv_send_ipi_ex *)hcall_page;
int stage = 1, ipis_expected[2] = {0};
hv_init(pgs_gpa);
GUEST_SYNC(stage++);
/* Wait for receiver vCPUs to come up */
while (!ipis_rcvd[RECEIVER_VCPU_ID_1] || !ipis_rcvd[RECEIVER_VCPU_ID_2])
nop_loop();
ipis_rcvd[RECEIVER_VCPU_ID_1] = ipis_rcvd[RECEIVER_VCPU_ID_2] = 0;
/* 'Slow' HvCallSendSyntheticClusterIpi to RECEIVER_VCPU_ID_1 */
ipi->vector = IPI_VECTOR;
ipi->cpu_mask = 1 << RECEIVER_VCPU_ID_1;
hyperv_hypercall(HVCALL_SEND_IPI, pgs_gpa, pgs_gpa + 4096);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ++ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ipis_expected[1]);
GUEST_SYNC(stage++);
/* 'Fast' HvCallSendSyntheticClusterIpi to RECEIVER_VCPU_ID_1 */
hyperv_hypercall(HVCALL_SEND_IPI | HV_HYPERCALL_FAST_BIT,
IPI_VECTOR, 1 << RECEIVER_VCPU_ID_1);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ++ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ipis_expected[1]);
GUEST_SYNC(stage++);
/* 'Slow' HvCallSendSyntheticClusterIpiEx to RECEIVER_VCPU_ID_1 */
memset(hcall_page, 0, 4096);
ipi_ex->vector = IPI_VECTOR;
ipi_ex->vp_set.format = HV_GENERIC_SET_SPARSE_4K;
ipi_ex->vp_set.valid_bank_mask = 1 << 0;
ipi_ex->vp_set.bank_contents[0] = BIT(RECEIVER_VCPU_ID_1);
hyperv_hypercall(HVCALL_SEND_IPI_EX | (1 << HV_HYPERCALL_VARHEAD_OFFSET),
pgs_gpa, pgs_gpa + 4096);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ++ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ipis_expected[1]);
GUEST_SYNC(stage++);
/* 'XMM Fast' HvCallSendSyntheticClusterIpiEx to RECEIVER_VCPU_ID_1 */
hyperv_write_xmm_input(&ipi_ex->vp_set.valid_bank_mask, 1);
hyperv_hypercall(HVCALL_SEND_IPI_EX | HV_HYPERCALL_FAST_BIT |
(1 << HV_HYPERCALL_VARHEAD_OFFSET),
IPI_VECTOR, HV_GENERIC_SET_SPARSE_4K);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ++ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ipis_expected[1]);
GUEST_SYNC(stage++);
/* 'Slow' HvCallSendSyntheticClusterIpiEx to RECEIVER_VCPU_ID_2 */
memset(hcall_page, 0, 4096);
ipi_ex->vector = IPI_VECTOR;
ipi_ex->vp_set.format = HV_GENERIC_SET_SPARSE_4K;
ipi_ex->vp_set.valid_bank_mask = 1 << 1;
ipi_ex->vp_set.bank_contents[0] = BIT(RECEIVER_VCPU_ID_2 - 64);
hyperv_hypercall(HVCALL_SEND_IPI_EX | (1 << HV_HYPERCALL_VARHEAD_OFFSET),
pgs_gpa, pgs_gpa + 4096);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ++ipis_expected[1]);
GUEST_SYNC(stage++);
/* 'XMM Fast' HvCallSendSyntheticClusterIpiEx to RECEIVER_VCPU_ID_2 */
hyperv_write_xmm_input(&ipi_ex->vp_set.valid_bank_mask, 1);
hyperv_hypercall(HVCALL_SEND_IPI_EX | HV_HYPERCALL_FAST_BIT |
(1 << HV_HYPERCALL_VARHEAD_OFFSET),
IPI_VECTOR, HV_GENERIC_SET_SPARSE_4K);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ++ipis_expected[1]);
GUEST_SYNC(stage++);
/* 'Slow' HvCallSendSyntheticClusterIpiEx to both RECEIVER_VCPU_ID_{1,2} */
memset(hcall_page, 0, 4096);
ipi_ex->vector = IPI_VECTOR;
ipi_ex->vp_set.format = HV_GENERIC_SET_SPARSE_4K;
ipi_ex->vp_set.valid_bank_mask = 1 << 1 | 1;
ipi_ex->vp_set.bank_contents[0] = BIT(RECEIVER_VCPU_ID_1);
ipi_ex->vp_set.bank_contents[1] = BIT(RECEIVER_VCPU_ID_2 - 64);
hyperv_hypercall(HVCALL_SEND_IPI_EX | (2 << HV_HYPERCALL_VARHEAD_OFFSET),
pgs_gpa, pgs_gpa + 4096);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ++ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ++ipis_expected[1]);
GUEST_SYNC(stage++);
/* 'XMM Fast' HvCallSendSyntheticClusterIpiEx to both RECEIVER_VCPU_ID_{1, 2} */
hyperv_write_xmm_input(&ipi_ex->vp_set.valid_bank_mask, 2);
hyperv_hypercall(HVCALL_SEND_IPI_EX | HV_HYPERCALL_FAST_BIT |
(2 << HV_HYPERCALL_VARHEAD_OFFSET),
IPI_VECTOR, HV_GENERIC_SET_SPARSE_4K);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ++ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ++ipis_expected[1]);
GUEST_SYNC(stage++);
/* 'Slow' HvCallSendSyntheticClusterIpiEx to HV_GENERIC_SET_ALL */
memset(hcall_page, 0, 4096);
ipi_ex->vector = IPI_VECTOR;
ipi_ex->vp_set.format = HV_GENERIC_SET_ALL;
hyperv_hypercall(HVCALL_SEND_IPI_EX, pgs_gpa, pgs_gpa + 4096);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ++ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ++ipis_expected[1]);
GUEST_SYNC(stage++);
/*
* 'XMM Fast' HvCallSendSyntheticClusterIpiEx to HV_GENERIC_SET_ALL.
*/
ipi_ex->vp_set.valid_bank_mask = 0;
hyperv_write_xmm_input(&ipi_ex->vp_set.valid_bank_mask, 2);
hyperv_hypercall(HVCALL_SEND_IPI_EX | HV_HYPERCALL_FAST_BIT,
IPI_VECTOR, HV_GENERIC_SET_ALL);
nop_loop();
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_1] == ++ipis_expected[0]);
GUEST_ASSERT(ipis_rcvd[RECEIVER_VCPU_ID_2] == ++ipis_expected[1]);
GUEST_SYNC(stage++);
GUEST_DONE();
}
static void *vcpu_thread(void *arg)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)arg;
int old, r;
r = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old);
TEST_ASSERT(!r, "pthread_setcanceltype failed on vcpu_id=%u with errno=%d",
vcpu->id, r);
vcpu_run(vcpu);
TEST_FAIL("vCPU %u exited unexpectedly", vcpu->id);
return NULL;
}
static void cancel_join_vcpu_thread(pthread_t thread, struct kvm_vcpu *vcpu)
{
void *retval;
int r;
r = pthread_cancel(thread);
TEST_ASSERT(!r, "pthread_cancel on vcpu_id=%d failed with errno=%d",
vcpu->id, r);
r = pthread_join(thread, &retval);
TEST_ASSERT(!r, "pthread_join on vcpu_id=%d failed with errno=%d",
vcpu->id, r);
TEST_ASSERT(retval == PTHREAD_CANCELED,
"expected retval=%p, got %p", PTHREAD_CANCELED,
retval);
}
int main(int argc, char *argv[])
{
struct kvm_vm *vm;
struct kvm_vcpu *vcpu[3];
unsigned int exit_reason;
vm_vaddr_t hcall_page;
pthread_t threads[2];
int stage = 1, r;
struct ucall uc;
vm = vm_create_with_one_vcpu(&vcpu[0], sender_guest_code);
/* Hypercall input/output */
hcall_page = vm_vaddr_alloc_pages(vm, 2);
memset(addr_gva2hva(vm, hcall_page), 0x0, 2 * getpagesize());
vm_init_descriptor_tables(vm);
vcpu[1] = vm_vcpu_add(vm, RECEIVER_VCPU_ID_1, receiver_code);
vcpu_init_descriptor_tables(vcpu[1]);
vcpu_args_set(vcpu[1], 2, hcall_page, addr_gva2gpa(vm, hcall_page));
vcpu_set_msr(vcpu[1], HV_X64_MSR_VP_INDEX, RECEIVER_VCPU_ID_1);
vcpu_set_hv_cpuid(vcpu[1]);
vcpu[2] = vm_vcpu_add(vm, RECEIVER_VCPU_ID_2, receiver_code);
vcpu_init_descriptor_tables(vcpu[2]);
vcpu_args_set(vcpu[2], 2, hcall_page, addr_gva2gpa(vm, hcall_page));
vcpu_set_msr(vcpu[2], HV_X64_MSR_VP_INDEX, RECEIVER_VCPU_ID_2);
vcpu_set_hv_cpuid(vcpu[2]);
vm_install_exception_handler(vm, IPI_VECTOR, guest_ipi_handler);
vcpu_args_set(vcpu[0], 2, hcall_page, addr_gva2gpa(vm, hcall_page));
vcpu_set_hv_cpuid(vcpu[0]);
r = pthread_create(&threads[0], NULL, vcpu_thread, vcpu[1]);
TEST_ASSERT(!r, "pthread_create failed errno=%d", r);
r = pthread_create(&threads[1], NULL, vcpu_thread, vcpu[2]);
TEST_ASSERT(!r, "pthread_create failed errno=%d", errno);
while (true) {
vcpu_run(vcpu[0]);
exit_reason = vcpu[0]->run->exit_reason;
TEST_ASSERT(exit_reason == KVM_EXIT_IO,
"unexpected exit reason: %u (%s)",
exit_reason, exit_reason_str(exit_reason));
switch (get_ucall(vcpu[0], &uc)) {
case UCALL_SYNC:
TEST_ASSERT(uc.args[1] == stage,
"Unexpected stage: %ld (%d expected)\n",
uc.args[1], stage);
break;
case UCALL_DONE:
goto done;
case UCALL_ABORT:
REPORT_GUEST_ASSERT(uc);
/* NOT REACHED */
default:
TEST_FAIL("Unknown ucall %lu", uc.cmd);
}
stage++;
}
done:
cancel_join_vcpu_thread(threads[0], vcpu[1]);
cancel_join_vcpu_thread(threads[1], vcpu[2]);
kvm_vm_free(vm);
return r;
}
|
