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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Hyper-V HvFlushVirtualAddress{List,Space}{,Ex} tests | |
4 | * | |
5 | * Copyright (C) 2022, Red Hat, Inc. | |
6 | * | |
7 | */ | |
8 | ||
9 | #define _GNU_SOURCE /* for program_invocation_short_name */ | |
10 | #include <asm/barrier.h> | |
11 | #include <pthread.h> | |
12 | #include <inttypes.h> | |
13 | ||
14 | #include "kvm_util.h" | |
15 | #include "processor.h" | |
16 | #include "hyperv.h" | |
17 | #include "test_util.h" | |
18 | #include "vmx.h" | |
19 | ||
20 | #define WORKER_VCPU_ID_1 2 | |
21 | #define WORKER_VCPU_ID_2 65 | |
22 | ||
23 | #define NTRY 100 | |
24 | #define NTEST_PAGES 2 | |
25 | ||
26 | struct hv_vpset { | |
27 | u64 format; | |
28 | u64 valid_bank_mask; | |
29 | u64 bank_contents[]; | |
30 | }; | |
31 | ||
32 | enum HV_GENERIC_SET_FORMAT { | |
33 | HV_GENERIC_SET_SPARSE_4K, | |
34 | HV_GENERIC_SET_ALL, | |
35 | }; | |
36 | ||
37 | #define HV_FLUSH_ALL_PROCESSORS BIT(0) | |
38 | #define HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES BIT(1) | |
39 | #define HV_FLUSH_NON_GLOBAL_MAPPINGS_ONLY BIT(2) | |
40 | #define HV_FLUSH_USE_EXTENDED_RANGE_FORMAT BIT(3) | |
41 | ||
42 | /* HvFlushVirtualAddressSpace, HvFlushVirtualAddressList hypercalls */ | |
43 | struct hv_tlb_flush { | |
44 | u64 address_space; | |
45 | u64 flags; | |
46 | u64 processor_mask; | |
47 | u64 gva_list[]; | |
48 | } __packed; | |
49 | ||
50 | /* HvFlushVirtualAddressSpaceEx, HvFlushVirtualAddressListEx hypercalls */ | |
51 | struct hv_tlb_flush_ex { | |
52 | u64 address_space; | |
53 | u64 flags; | |
54 | struct hv_vpset hv_vp_set; | |
55 | u64 gva_list[]; | |
56 | } __packed; | |
57 | ||
58 | /* | |
59 | * Pass the following info to 'workers' and 'sender' | |
60 | * - Hypercall page's GVA | |
61 | * - Hypercall page's GPA | |
62 | * - Test pages GVA | |
63 | * - GVAs of the test pages' PTEs | |
64 | */ | |
65 | struct test_data { | |
66 | vm_vaddr_t hcall_gva; | |
67 | vm_paddr_t hcall_gpa; | |
68 | vm_vaddr_t test_pages; | |
69 | vm_vaddr_t test_pages_pte[NTEST_PAGES]; | |
70 | }; | |
71 | ||
72 | /* 'Worker' vCPU code checking the contents of the test page */ | |
73 | static void worker_guest_code(vm_vaddr_t test_data) | |
74 | { | |
75 | struct test_data *data = (struct test_data *)test_data; | |
76 | u32 vcpu_id = rdmsr(HV_X64_MSR_VP_INDEX); | |
77 | void *exp_page = (void *)data->test_pages + PAGE_SIZE * NTEST_PAGES; | |
78 | u64 *this_cpu = (u64 *)(exp_page + vcpu_id * sizeof(u64)); | |
79 | u64 expected, val; | |
80 | ||
81 | x2apic_enable(); | |
82 | wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID); | |
83 | ||
84 | for (;;) { | |
85 | cpu_relax(); | |
86 | ||
87 | expected = READ_ONCE(*this_cpu); | |
88 | ||
89 | /* | |
90 | * Make sure the value in the test page is read after reading | |
91 | * the expectation for the first time. Pairs with wmb() in | |
92 | * prepare_to_test(). | |
93 | */ | |
94 | rmb(); | |
95 | ||
96 | val = READ_ONCE(*(u64 *)data->test_pages); | |
97 | ||
98 | /* | |
99 | * Make sure the value in the test page is read after before | |
100 | * reading the expectation for the second time. Pairs with wmb() | |
101 | * post_test(). | |
102 | */ | |
103 | rmb(); | |
104 | ||
105 | /* | |
106 | * '0' indicates the sender is between iterations, wait until | |
107 | * the sender is ready for this vCPU to start checking again. | |
108 | */ | |
109 | if (!expected) | |
110 | continue; | |
111 | ||
112 | /* | |
113 | * Re-read the per-vCPU byte to ensure the sender didn't move | |
114 | * onto a new iteration. | |
115 | */ | |
116 | if (expected != READ_ONCE(*this_cpu)) | |
117 | continue; | |
118 | ||
119 | GUEST_ASSERT(val == expected); | |
120 | } | |
121 | } | |
122 | ||
123 | /* | |
124 | * Write per-CPU info indicating what each 'worker' CPU is supposed to see in | |
125 | * test page. '0' means don't check. | |
126 | */ | |
127 | static void set_expected_val(void *addr, u64 val, int vcpu_id) | |
128 | { | |
129 | void *exp_page = addr + PAGE_SIZE * NTEST_PAGES; | |
130 | ||
131 | *(u64 *)(exp_page + vcpu_id * sizeof(u64)) = val; | |
132 | } | |
133 | ||
134 | /* | |
135 | * Update PTEs swapping two test pages. | |
136 | * TODO: use swap()/xchg() when these are provided. | |
137 | */ | |
138 | static void swap_two_test_pages(vm_paddr_t pte_gva1, vm_paddr_t pte_gva2) | |
139 | { | |
140 | uint64_t tmp = *(uint64_t *)pte_gva1; | |
141 | ||
142 | *(uint64_t *)pte_gva1 = *(uint64_t *)pte_gva2; | |
143 | *(uint64_t *)pte_gva2 = tmp; | |
144 | } | |
145 | ||
146 | /* | |
147 | * TODO: replace the silly NOP loop with a proper udelay() implementation. | |
148 | */ | |
149 | static inline void do_delay(void) | |
150 | { | |
151 | int i; | |
152 | ||
153 | for (i = 0; i < 1000000; i++) | |
154 | asm volatile("nop"); | |
155 | } | |
156 | ||
157 | /* | |
158 | * Prepare to test: 'disable' workers by setting the expectation to '0', | |
159 | * clear hypercall input page and then swap two test pages. | |
160 | */ | |
161 | static inline void prepare_to_test(struct test_data *data) | |
162 | { | |
163 | /* Clear hypercall input page */ | |
164 | memset((void *)data->hcall_gva, 0, PAGE_SIZE); | |
165 | ||
166 | /* 'Disable' workers */ | |
167 | set_expected_val((void *)data->test_pages, 0x0, WORKER_VCPU_ID_1); | |
168 | set_expected_val((void *)data->test_pages, 0x0, WORKER_VCPU_ID_2); | |
169 | ||
170 | /* Make sure workers are 'disabled' before we swap PTEs. */ | |
171 | wmb(); | |
172 | ||
173 | /* Make sure workers have enough time to notice */ | |
174 | do_delay(); | |
175 | ||
176 | /* Swap test page mappings */ | |
177 | swap_two_test_pages(data->test_pages_pte[0], data->test_pages_pte[1]); | |
178 | } | |
179 | ||
180 | /* | |
181 | * Finalize the test: check hypercall resule set the expected val for | |
182 | * 'worker' CPUs and give them some time to test. | |
183 | */ | |
184 | static inline void post_test(struct test_data *data, u64 exp1, u64 exp2) | |
185 | { | |
186 | /* Make sure we change the expectation after swapping PTEs */ | |
187 | wmb(); | |
188 | ||
189 | /* Set the expectation for workers, '0' means don't test */ | |
190 | set_expected_val((void *)data->test_pages, exp1, WORKER_VCPU_ID_1); | |
191 | set_expected_val((void *)data->test_pages, exp2, WORKER_VCPU_ID_2); | |
192 | ||
193 | /* Make sure workers have enough time to test */ | |
194 | do_delay(); | |
195 | } | |
196 | ||
197 | #define TESTVAL1 0x0101010101010101 | |
198 | #define TESTVAL2 0x0202020202020202 | |
199 | ||
200 | /* Main vCPU doing the test */ | |
201 | static void sender_guest_code(vm_vaddr_t test_data) | |
202 | { | |
203 | struct test_data *data = (struct test_data *)test_data; | |
204 | struct hv_tlb_flush *flush = (struct hv_tlb_flush *)data->hcall_gva; | |
205 | struct hv_tlb_flush_ex *flush_ex = (struct hv_tlb_flush_ex *)data->hcall_gva; | |
206 | vm_paddr_t hcall_gpa = data->hcall_gpa; | |
207 | int i, stage = 1; | |
208 | ||
209 | wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID); | |
210 | wrmsr(HV_X64_MSR_HYPERCALL, data->hcall_gpa); | |
211 | ||
212 | /* "Slow" hypercalls */ | |
213 | ||
214 | GUEST_SYNC(stage++); | |
215 | ||
216 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE for WORKER_VCPU_ID_1 */ | |
217 | for (i = 0; i < NTRY; i++) { | |
218 | prepare_to_test(data); | |
219 | flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
220 | flush->processor_mask = BIT(WORKER_VCPU_ID_1); | |
221 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE, hcall_gpa, | |
222 | hcall_gpa + PAGE_SIZE); | |
223 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, 0x0); | |
224 | } | |
225 | ||
226 | GUEST_SYNC(stage++); | |
227 | ||
228 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST for WORKER_VCPU_ID_1 */ | |
229 | for (i = 0; i < NTRY; i++) { | |
230 | prepare_to_test(data); | |
231 | flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
232 | flush->processor_mask = BIT(WORKER_VCPU_ID_1); | |
233 | flush->gva_list[0] = (u64)data->test_pages; | |
234 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST | | |
235 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
236 | hcall_gpa, hcall_gpa + PAGE_SIZE); | |
237 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, 0x0); | |
238 | } | |
239 | ||
240 | GUEST_SYNC(stage++); | |
241 | ||
242 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE for HV_FLUSH_ALL_PROCESSORS */ | |
243 | for (i = 0; i < NTRY; i++) { | |
244 | prepare_to_test(data); | |
245 | flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | | |
246 | HV_FLUSH_ALL_PROCESSORS; | |
247 | flush->processor_mask = 0; | |
248 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE, hcall_gpa, | |
249 | hcall_gpa + PAGE_SIZE); | |
250 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, i % 2 ? TESTVAL1 : TESTVAL2); | |
251 | } | |
252 | ||
253 | GUEST_SYNC(stage++); | |
254 | ||
255 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST for HV_FLUSH_ALL_PROCESSORS */ | |
256 | for (i = 0; i < NTRY; i++) { | |
257 | prepare_to_test(data); | |
258 | flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | | |
259 | HV_FLUSH_ALL_PROCESSORS; | |
260 | flush->gva_list[0] = (u64)data->test_pages; | |
261 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST | | |
262 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
263 | hcall_gpa, hcall_gpa + PAGE_SIZE); | |
264 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
265 | i % 2 ? TESTVAL1 : TESTVAL2); | |
266 | } | |
267 | ||
268 | GUEST_SYNC(stage++); | |
269 | ||
270 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for WORKER_VCPU_ID_2 */ | |
271 | for (i = 0; i < NTRY; i++) { | |
272 | prepare_to_test(data); | |
273 | flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
274 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; | |
275 | flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64); | |
276 | flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_2 % 64); | |
277 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | | |
278 | (1 << HV_HYPERCALL_VARHEAD_OFFSET), | |
279 | hcall_gpa, hcall_gpa + PAGE_SIZE); | |
280 | post_test(data, 0x0, i % 2 ? TESTVAL1 : TESTVAL2); | |
281 | } | |
282 | ||
283 | GUEST_SYNC(stage++); | |
284 | ||
285 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for WORKER_VCPU_ID_2 */ | |
286 | for (i = 0; i < NTRY; i++) { | |
287 | prepare_to_test(data); | |
288 | flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
289 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; | |
290 | flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64); | |
291 | flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_2 % 64); | |
292 | /* bank_contents and gva_list occupy the same space, thus [1] */ | |
293 | flush_ex->gva_list[1] = (u64)data->test_pages; | |
294 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | | |
295 | (1 << HV_HYPERCALL_VARHEAD_OFFSET) | | |
296 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
297 | hcall_gpa, hcall_gpa + PAGE_SIZE); | |
298 | post_test(data, 0x0, i % 2 ? TESTVAL1 : TESTVAL2); | |
299 | } | |
300 | ||
301 | GUEST_SYNC(stage++); | |
302 | ||
303 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for both vCPUs */ | |
304 | for (i = 0; i < NTRY; i++) { | |
305 | prepare_to_test(data); | |
306 | flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
307 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; | |
308 | flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64) | | |
309 | BIT_ULL(WORKER_VCPU_ID_1 / 64); | |
310 | flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_1 % 64); | |
311 | flush_ex->hv_vp_set.bank_contents[1] = BIT_ULL(WORKER_VCPU_ID_2 % 64); | |
312 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | | |
313 | (2 << HV_HYPERCALL_VARHEAD_OFFSET), | |
314 | hcall_gpa, hcall_gpa + PAGE_SIZE); | |
315 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
316 | i % 2 ? TESTVAL1 : TESTVAL2); | |
317 | } | |
318 | ||
319 | GUEST_SYNC(stage++); | |
320 | ||
321 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for both vCPUs */ | |
322 | for (i = 0; i < NTRY; i++) { | |
323 | prepare_to_test(data); | |
324 | flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
325 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; | |
326 | flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_1 / 64) | | |
327 | BIT_ULL(WORKER_VCPU_ID_2 / 64); | |
328 | flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_1 % 64); | |
329 | flush_ex->hv_vp_set.bank_contents[1] = BIT_ULL(WORKER_VCPU_ID_2 % 64); | |
330 | /* bank_contents and gva_list occupy the same space, thus [2] */ | |
331 | flush_ex->gva_list[2] = (u64)data->test_pages; | |
332 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | | |
333 | (2 << HV_HYPERCALL_VARHEAD_OFFSET) | | |
334 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
335 | hcall_gpa, hcall_gpa + PAGE_SIZE); | |
336 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
337 | i % 2 ? TESTVAL1 : TESTVAL2); | |
338 | } | |
339 | ||
340 | GUEST_SYNC(stage++); | |
341 | ||
342 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for HV_GENERIC_SET_ALL */ | |
343 | for (i = 0; i < NTRY; i++) { | |
344 | prepare_to_test(data); | |
345 | flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
346 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_ALL; | |
347 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX, | |
348 | hcall_gpa, hcall_gpa + PAGE_SIZE); | |
349 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
350 | i % 2 ? TESTVAL1 : TESTVAL2); | |
351 | } | |
352 | ||
353 | GUEST_SYNC(stage++); | |
354 | ||
355 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for HV_GENERIC_SET_ALL */ | |
356 | for (i = 0; i < NTRY; i++) { | |
357 | prepare_to_test(data); | |
358 | flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
359 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_ALL; | |
360 | flush_ex->gva_list[0] = (u64)data->test_pages; | |
361 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | | |
362 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
363 | hcall_gpa, hcall_gpa + PAGE_SIZE); | |
364 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
365 | i % 2 ? TESTVAL1 : TESTVAL2); | |
366 | } | |
367 | ||
368 | /* "Fast" hypercalls */ | |
369 | ||
370 | GUEST_SYNC(stage++); | |
371 | ||
372 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE for WORKER_VCPU_ID_1 */ | |
373 | for (i = 0; i < NTRY; i++) { | |
374 | prepare_to_test(data); | |
375 | flush->processor_mask = BIT(WORKER_VCPU_ID_1); | |
376 | hyperv_write_xmm_input(&flush->processor_mask, 1); | |
377 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | | |
378 | HV_HYPERCALL_FAST_BIT, 0x0, | |
379 | HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); | |
380 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, 0x0); | |
381 | } | |
382 | ||
383 | GUEST_SYNC(stage++); | |
384 | ||
385 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST for WORKER_VCPU_ID_1 */ | |
386 | for (i = 0; i < NTRY; i++) { | |
387 | prepare_to_test(data); | |
388 | flush->processor_mask = BIT(WORKER_VCPU_ID_1); | |
389 | flush->gva_list[0] = (u64)data->test_pages; | |
390 | hyperv_write_xmm_input(&flush->processor_mask, 1); | |
391 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST | | |
392 | HV_HYPERCALL_FAST_BIT | | |
393 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
394 | 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); | |
395 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, 0x0); | |
396 | } | |
397 | ||
398 | GUEST_SYNC(stage++); | |
399 | ||
400 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE for HV_FLUSH_ALL_PROCESSORS */ | |
401 | for (i = 0; i < NTRY; i++) { | |
402 | prepare_to_test(data); | |
403 | hyperv_write_xmm_input(&flush->processor_mask, 1); | |
404 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | | |
405 | HV_HYPERCALL_FAST_BIT, 0x0, | |
406 | HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | | |
407 | HV_FLUSH_ALL_PROCESSORS); | |
408 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
409 | i % 2 ? TESTVAL1 : TESTVAL2); | |
410 | } | |
411 | ||
412 | GUEST_SYNC(stage++); | |
413 | ||
414 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST for HV_FLUSH_ALL_PROCESSORS */ | |
415 | for (i = 0; i < NTRY; i++) { | |
416 | prepare_to_test(data); | |
417 | flush->gva_list[0] = (u64)data->test_pages; | |
418 | hyperv_write_xmm_input(&flush->processor_mask, 1); | |
419 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST | | |
420 | HV_HYPERCALL_FAST_BIT | | |
421 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), 0x0, | |
422 | HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | | |
423 | HV_FLUSH_ALL_PROCESSORS); | |
424 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
425 | i % 2 ? TESTVAL1 : TESTVAL2); | |
426 | } | |
427 | ||
428 | GUEST_SYNC(stage++); | |
429 | ||
430 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for WORKER_VCPU_ID_2 */ | |
431 | for (i = 0; i < NTRY; i++) { | |
432 | prepare_to_test(data); | |
433 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; | |
434 | flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64); | |
435 | flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_2 % 64); | |
436 | hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); | |
437 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | | |
438 | HV_HYPERCALL_FAST_BIT | | |
439 | (1 << HV_HYPERCALL_VARHEAD_OFFSET), | |
440 | 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); | |
441 | post_test(data, 0x0, i % 2 ? TESTVAL1 : TESTVAL2); | |
442 | } | |
443 | ||
444 | GUEST_SYNC(stage++); | |
445 | ||
446 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for WORKER_VCPU_ID_2 */ | |
447 | for (i = 0; i < NTRY; i++) { | |
448 | prepare_to_test(data); | |
449 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; | |
450 | flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64); | |
451 | flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_2 % 64); | |
452 | /* bank_contents and gva_list occupy the same space, thus [1] */ | |
453 | flush_ex->gva_list[1] = (u64)data->test_pages; | |
454 | hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); | |
455 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | | |
456 | HV_HYPERCALL_FAST_BIT | | |
457 | (1 << HV_HYPERCALL_VARHEAD_OFFSET) | | |
458 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
459 | 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); | |
460 | post_test(data, 0x0, i % 2 ? TESTVAL1 : TESTVAL2); | |
461 | } | |
462 | ||
463 | GUEST_SYNC(stage++); | |
464 | ||
465 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for both vCPUs */ | |
466 | for (i = 0; i < NTRY; i++) { | |
467 | prepare_to_test(data); | |
468 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; | |
469 | flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64) | | |
470 | BIT_ULL(WORKER_VCPU_ID_1 / 64); | |
471 | flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_1 % 64); | |
472 | flush_ex->hv_vp_set.bank_contents[1] = BIT_ULL(WORKER_VCPU_ID_2 % 64); | |
473 | hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); | |
474 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | | |
475 | HV_HYPERCALL_FAST_BIT | | |
476 | (2 << HV_HYPERCALL_VARHEAD_OFFSET), | |
477 | 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); | |
478 | post_test(data, i % 2 ? TESTVAL1 : | |
479 | TESTVAL2, i % 2 ? TESTVAL1 : TESTVAL2); | |
480 | } | |
481 | ||
482 | GUEST_SYNC(stage++); | |
483 | ||
484 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for both vCPUs */ | |
485 | for (i = 0; i < NTRY; i++) { | |
486 | prepare_to_test(data); | |
487 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; | |
488 | flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_1 / 64) | | |
489 | BIT_ULL(WORKER_VCPU_ID_2 / 64); | |
490 | flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_1 % 64); | |
491 | flush_ex->hv_vp_set.bank_contents[1] = BIT_ULL(WORKER_VCPU_ID_2 % 64); | |
492 | /* bank_contents and gva_list occupy the same space, thus [2] */ | |
493 | flush_ex->gva_list[2] = (u64)data->test_pages; | |
494 | hyperv_write_xmm_input(&flush_ex->hv_vp_set, 3); | |
495 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | | |
496 | HV_HYPERCALL_FAST_BIT | | |
497 | (2 << HV_HYPERCALL_VARHEAD_OFFSET) | | |
498 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
499 | 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); | |
500 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
501 | i % 2 ? TESTVAL1 : TESTVAL2); | |
502 | } | |
503 | ||
504 | GUEST_SYNC(stage++); | |
505 | ||
506 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for HV_GENERIC_SET_ALL */ | |
507 | for (i = 0; i < NTRY; i++) { | |
508 | prepare_to_test(data); | |
509 | flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
510 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_ALL; | |
511 | hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); | |
512 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | | |
513 | HV_HYPERCALL_FAST_BIT, | |
514 | 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); | |
515 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
516 | i % 2 ? TESTVAL1 : TESTVAL2); | |
517 | } | |
518 | ||
519 | GUEST_SYNC(stage++); | |
520 | ||
521 | /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for HV_GENERIC_SET_ALL */ | |
522 | for (i = 0; i < NTRY; i++) { | |
523 | prepare_to_test(data); | |
524 | flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; | |
525 | flush_ex->hv_vp_set.format = HV_GENERIC_SET_ALL; | |
526 | flush_ex->gva_list[0] = (u64)data->test_pages; | |
527 | hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); | |
528 | hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | | |
529 | HV_HYPERCALL_FAST_BIT | | |
530 | (1UL << HV_HYPERCALL_REP_COMP_OFFSET), | |
531 | 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); | |
532 | post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, | |
533 | i % 2 ? TESTVAL1 : TESTVAL2); | |
534 | } | |
535 | ||
536 | GUEST_DONE(); | |
537 | } | |
538 | ||
539 | static void *vcpu_thread(void *arg) | |
540 | { | |
541 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)arg; | |
542 | struct ucall uc; | |
543 | int old; | |
544 | int r; | |
9e7726a8 VK |
545 | |
546 | r = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old); | |
547 | TEST_ASSERT(!r, "pthread_setcanceltype failed on vcpu_id=%u with errno=%d", | |
548 | vcpu->id, r); | |
549 | ||
550 | vcpu_run(vcpu); | |
c96f57b0 | 551 | TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO); |
9e7726a8 VK |
552 | |
553 | switch (get_ucall(vcpu, &uc)) { | |
554 | case UCALL_ABORT: | |
555 | REPORT_GUEST_ASSERT(uc); | |
556 | /* NOT REACHED */ | |
557 | default: | |
558 | TEST_FAIL("Unexpected ucall %lu, vCPU %d", uc.cmd, vcpu->id); | |
559 | } | |
560 | ||
561 | return NULL; | |
562 | } | |
563 | ||
564 | static void cancel_join_vcpu_thread(pthread_t thread, struct kvm_vcpu *vcpu) | |
565 | { | |
566 | void *retval; | |
567 | int r; | |
568 | ||
569 | r = pthread_cancel(thread); | |
570 | TEST_ASSERT(!r, "pthread_cancel on vcpu_id=%d failed with errno=%d", | |
571 | vcpu->id, r); | |
572 | ||
573 | r = pthread_join(thread, &retval); | |
574 | TEST_ASSERT(!r, "pthread_join on vcpu_id=%d failed with errno=%d", | |
575 | vcpu->id, r); | |
576 | TEST_ASSERT(retval == PTHREAD_CANCELED, | |
577 | "expected retval=%p, got %p", PTHREAD_CANCELED, | |
578 | retval); | |
579 | } | |
580 | ||
581 | int main(int argc, char *argv[]) | |
582 | { | |
583 | struct kvm_vm *vm; | |
584 | struct kvm_vcpu *vcpu[3]; | |
9e7726a8 VK |
585 | pthread_t threads[2]; |
586 | vm_vaddr_t test_data_page, gva; | |
587 | vm_paddr_t gpa; | |
588 | uint64_t *pte; | |
589 | struct test_data *data; | |
590 | struct ucall uc; | |
591 | int stage = 1, r, i; | |
592 | ||
6dac1195 VK |
593 | TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_TLBFLUSH)); |
594 | ||
9e7726a8 VK |
595 | vm = vm_create_with_one_vcpu(&vcpu[0], sender_guest_code); |
596 | ||
597 | /* Test data page */ | |
598 | test_data_page = vm_vaddr_alloc_page(vm); | |
599 | data = (struct test_data *)addr_gva2hva(vm, test_data_page); | |
600 | ||
601 | /* Hypercall input/output */ | |
602 | data->hcall_gva = vm_vaddr_alloc_pages(vm, 2); | |
603 | data->hcall_gpa = addr_gva2gpa(vm, data->hcall_gva); | |
604 | memset(addr_gva2hva(vm, data->hcall_gva), 0x0, 2 * PAGE_SIZE); | |
605 | ||
606 | /* | |
607 | * Test pages: the first one is filled with '0x01's, the second with '0x02's | |
608 | * and the test will swap their mappings. The third page keeps the indication | |
609 | * about the current state of mappings. | |
610 | */ | |
611 | data->test_pages = vm_vaddr_alloc_pages(vm, NTEST_PAGES + 1); | |
612 | for (i = 0; i < NTEST_PAGES; i++) | |
613 | memset(addr_gva2hva(vm, data->test_pages + PAGE_SIZE * i), | |
614 | (u8)(i + 1), PAGE_SIZE); | |
615 | set_expected_val(addr_gva2hva(vm, data->test_pages), 0x0, WORKER_VCPU_ID_1); | |
616 | set_expected_val(addr_gva2hva(vm, data->test_pages), 0x0, WORKER_VCPU_ID_2); | |
617 | ||
618 | /* | |
619 | * Get PTE pointers for test pages and map them inside the guest. | |
620 | * Use separate page for each PTE for simplicity. | |
621 | */ | |
622 | gva = vm_vaddr_unused_gap(vm, NTEST_PAGES * PAGE_SIZE, KVM_UTIL_MIN_VADDR); | |
623 | for (i = 0; i < NTEST_PAGES; i++) { | |
624 | pte = vm_get_page_table_entry(vm, data->test_pages + i * PAGE_SIZE); | |
625 | gpa = addr_hva2gpa(vm, pte); | |
626 | __virt_pg_map(vm, gva + PAGE_SIZE * i, gpa & PAGE_MASK, PG_LEVEL_4K); | |
627 | data->test_pages_pte[i] = gva + (gpa & ~PAGE_MASK); | |
628 | } | |
629 | ||
630 | /* | |
631 | * Sender vCPU which performs the test: swaps test pages, sets expectation | |
632 | * for 'workers' and issues TLB flush hypercalls. | |
633 | */ | |
634 | vcpu_args_set(vcpu[0], 1, test_data_page); | |
635 | vcpu_set_hv_cpuid(vcpu[0]); | |
636 | ||
637 | /* Create worker vCPUs which check the contents of the test pages */ | |
638 | vcpu[1] = vm_vcpu_add(vm, WORKER_VCPU_ID_1, worker_guest_code); | |
639 | vcpu_args_set(vcpu[1], 1, test_data_page); | |
640 | vcpu_set_msr(vcpu[1], HV_X64_MSR_VP_INDEX, WORKER_VCPU_ID_1); | |
641 | vcpu_set_hv_cpuid(vcpu[1]); | |
642 | ||
643 | vcpu[2] = vm_vcpu_add(vm, WORKER_VCPU_ID_2, worker_guest_code); | |
644 | vcpu_args_set(vcpu[2], 1, test_data_page); | |
645 | vcpu_set_msr(vcpu[2], HV_X64_MSR_VP_INDEX, WORKER_VCPU_ID_2); | |
646 | vcpu_set_hv_cpuid(vcpu[2]); | |
647 | ||
648 | r = pthread_create(&threads[0], NULL, vcpu_thread, vcpu[1]); | |
649 | TEST_ASSERT(!r, "pthread_create() failed"); | |
650 | ||
651 | r = pthread_create(&threads[1], NULL, vcpu_thread, vcpu[2]); | |
652 | TEST_ASSERT(!r, "pthread_create() failed"); | |
653 | ||
654 | while (true) { | |
655 | vcpu_run(vcpu[0]); | |
c96f57b0 | 656 | TEST_ASSERT_KVM_EXIT_REASON(vcpu[0], KVM_EXIT_IO); |
9e7726a8 VK |
657 | |
658 | switch (get_ucall(vcpu[0], &uc)) { | |
659 | case UCALL_SYNC: | |
660 | TEST_ASSERT(uc.args[1] == stage, | |
65612e99 | 661 | "Unexpected stage: %ld (%d expected)", |
9e7726a8 VK |
662 | uc.args[1], stage); |
663 | break; | |
664 | case UCALL_ABORT: | |
665 | REPORT_GUEST_ASSERT(uc); | |
666 | /* NOT REACHED */ | |
667 | case UCALL_DONE: | |
668 | goto done; | |
669 | default: | |
670 | TEST_FAIL("Unknown ucall %lu", uc.cmd); | |
671 | } | |
672 | ||
673 | stage++; | |
674 | } | |
675 | ||
676 | done: | |
677 | cancel_join_vcpu_thread(threads[0], vcpu[1]); | |
678 | cancel_join_vcpu_thread(threads[1], vcpu[2]); | |
679 | kvm_vm_free(vm); | |
680 | ||
681 | return 0; | |
682 | } |