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Commit | Line | Data |
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e2c7d025 EA |
1 | /* |
2 | * generic functions used by VFIO devices | |
3 | * | |
4 | * Copyright Red Hat, Inc. 2012 | |
5 | * | |
6 | * Authors: | |
7 | * Alex Williamson <alex.williamson@redhat.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | * Based on qemu-kvm device-assignment: | |
13 | * Adapted for KVM by Qumranet. | |
14 | * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com) | |
15 | * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com) | |
16 | * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com) | |
17 | * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com) | |
18 | * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com) | |
19 | */ | |
20 | ||
c6eacb1a | 21 | #include "qemu/osdep.h" |
e2c7d025 | 22 | #include <sys/ioctl.h> |
a9c94277 MA |
23 | #ifdef CONFIG_KVM |
24 | #include <linux/kvm.h> | |
25 | #endif | |
e2c7d025 EA |
26 | #include <linux/vfio.h> |
27 | ||
28 | #include "hw/vfio/vfio-common.h" | |
29 | #include "hw/vfio/vfio.h" | |
30 | #include "exec/address-spaces.h" | |
31 | #include "exec/memory.h" | |
b6dd6504 | 32 | #include "exec/ram_addr.h" |
e2c7d025 EA |
33 | #include "hw/hw.h" |
34 | #include "qemu/error-report.h" | |
db725815 | 35 | #include "qemu/main-loop.h" |
f4ec5e26 | 36 | #include "qemu/range.h" |
e2c7d025 | 37 | #include "sysemu/kvm.h" |
71e8a915 | 38 | #include "sysemu/reset.h" |
0fd7616e | 39 | #include "sysemu/runstate.h" |
e2c7d025 | 40 | #include "trace.h" |
01905f58 | 41 | #include "qapi/error.h" |
b6dd6504 | 42 | #include "migration/migration.h" |
e2c7d025 | 43 | |
f481ee2d | 44 | VFIOGroupList vfio_group_list = |
39cb514f | 45 | QLIST_HEAD_INITIALIZER(vfio_group_list); |
10ca76b4 | 46 | static QLIST_HEAD(, VFIOAddressSpace) vfio_address_spaces = |
e2c7d025 EA |
47 | QLIST_HEAD_INITIALIZER(vfio_address_spaces); |
48 | ||
49 | #ifdef CONFIG_KVM | |
50 | /* | |
51 | * We have a single VFIO pseudo device per KVM VM. Once created it lives | |
52 | * for the life of the VM. Closing the file descriptor only drops our | |
53 | * reference to it and the device's reference to kvm. Therefore once | |
54 | * initialized, this file descriptor is only released on QEMU exit and | |
55 | * we'll re-use it should another vfio device be attached before then. | |
56 | */ | |
57 | static int vfio_kvm_device_fd = -1; | |
58 | #endif | |
59 | ||
60 | /* | |
61 | * Common VFIO interrupt disable | |
62 | */ | |
63 | void vfio_disable_irqindex(VFIODevice *vbasedev, int index) | |
64 | { | |
65 | struct vfio_irq_set irq_set = { | |
66 | .argsz = sizeof(irq_set), | |
67 | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER, | |
68 | .index = index, | |
69 | .start = 0, | |
70 | .count = 0, | |
71 | }; | |
72 | ||
73 | ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); | |
74 | } | |
75 | ||
76 | void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index) | |
77 | { | |
78 | struct vfio_irq_set irq_set = { | |
79 | .argsz = sizeof(irq_set), | |
80 | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK, | |
81 | .index = index, | |
82 | .start = 0, | |
83 | .count = 1, | |
84 | }; | |
85 | ||
86 | ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); | |
87 | } | |
88 | ||
89 | void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index) | |
90 | { | |
91 | struct vfio_irq_set irq_set = { | |
92 | .argsz = sizeof(irq_set), | |
93 | .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK, | |
94 | .index = index, | |
95 | .start = 0, | |
96 | .count = 1, | |
97 | }; | |
98 | ||
99 | ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); | |
100 | } | |
101 | ||
201a7331 EA |
102 | static inline const char *action_to_str(int action) |
103 | { | |
104 | switch (action) { | |
105 | case VFIO_IRQ_SET_ACTION_MASK: | |
106 | return "MASK"; | |
107 | case VFIO_IRQ_SET_ACTION_UNMASK: | |
108 | return "UNMASK"; | |
109 | case VFIO_IRQ_SET_ACTION_TRIGGER: | |
110 | return "TRIGGER"; | |
111 | default: | |
112 | return "UNKNOWN ACTION"; | |
113 | } | |
114 | } | |
115 | ||
116 | static const char *index_to_str(VFIODevice *vbasedev, int index) | |
117 | { | |
118 | if (vbasedev->type != VFIO_DEVICE_TYPE_PCI) { | |
119 | return NULL; | |
120 | } | |
121 | ||
122 | switch (index) { | |
123 | case VFIO_PCI_INTX_IRQ_INDEX: | |
124 | return "INTX"; | |
125 | case VFIO_PCI_MSI_IRQ_INDEX: | |
126 | return "MSI"; | |
127 | case VFIO_PCI_MSIX_IRQ_INDEX: | |
128 | return "MSIX"; | |
129 | case VFIO_PCI_ERR_IRQ_INDEX: | |
130 | return "ERR"; | |
131 | case VFIO_PCI_REQ_IRQ_INDEX: | |
132 | return "REQ"; | |
133 | default: | |
134 | return NULL; | |
135 | } | |
136 | } | |
137 | ||
53d1b5fc DH |
138 | static int vfio_ram_block_discard_disable(VFIOContainer *container, bool state) |
139 | { | |
140 | switch (container->iommu_type) { | |
141 | case VFIO_TYPE1v2_IOMMU: | |
142 | case VFIO_TYPE1_IOMMU: | |
143 | /* | |
144 | * We support coordinated discarding of RAM via the RamDiscardManager. | |
145 | */ | |
146 | return ram_block_uncoordinated_discard_disable(state); | |
147 | default: | |
148 | /* | |
149 | * VFIO_SPAPR_TCE_IOMMU most probably works just fine with | |
150 | * RamDiscardManager, however, it is completely untested. | |
151 | * | |
152 | * VFIO_SPAPR_TCE_v2_IOMMU with "DMA memory preregistering" does | |
153 | * completely the opposite of managing mapping/pinning dynamically as | |
154 | * required by RamDiscardManager. We would have to special-case sections | |
155 | * with a RamDiscardManager. | |
156 | */ | |
157 | return ram_block_discard_disable(state); | |
158 | } | |
159 | } | |
160 | ||
201a7331 EA |
161 | int vfio_set_irq_signaling(VFIODevice *vbasedev, int index, int subindex, |
162 | int action, int fd, Error **errp) | |
163 | { | |
164 | struct vfio_irq_set *irq_set; | |
165 | int argsz, ret = 0; | |
166 | const char *name; | |
167 | int32_t *pfd; | |
168 | ||
169 | argsz = sizeof(*irq_set) + sizeof(*pfd); | |
170 | ||
171 | irq_set = g_malloc0(argsz); | |
172 | irq_set->argsz = argsz; | |
173 | irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | action; | |
174 | irq_set->index = index; | |
175 | irq_set->start = subindex; | |
176 | irq_set->count = 1; | |
177 | pfd = (int32_t *)&irq_set->data; | |
178 | *pfd = fd; | |
179 | ||
180 | if (ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, irq_set)) { | |
181 | ret = -errno; | |
182 | } | |
183 | g_free(irq_set); | |
184 | ||
185 | if (!ret) { | |
186 | return 0; | |
187 | } | |
188 | ||
189 | error_setg_errno(errp, -ret, "VFIO_DEVICE_SET_IRQS failure"); | |
190 | ||
191 | name = index_to_str(vbasedev, index); | |
192 | if (name) { | |
193 | error_prepend(errp, "%s-%d: ", name, subindex); | |
194 | } else { | |
195 | error_prepend(errp, "index %d-%d: ", index, subindex); | |
196 | } | |
197 | error_prepend(errp, | |
198 | "Failed to %s %s eventfd signaling for interrupt ", | |
199 | fd < 0 ? "tear down" : "set up", action_to_str(action)); | |
200 | return ret; | |
201 | } | |
202 | ||
e2c7d025 EA |
203 | /* |
204 | * IO Port/MMIO - Beware of the endians, VFIO is always little endian | |
205 | */ | |
206 | void vfio_region_write(void *opaque, hwaddr addr, | |
207 | uint64_t data, unsigned size) | |
208 | { | |
209 | VFIORegion *region = opaque; | |
210 | VFIODevice *vbasedev = region->vbasedev; | |
211 | union { | |
212 | uint8_t byte; | |
213 | uint16_t word; | |
214 | uint32_t dword; | |
215 | uint64_t qword; | |
216 | } buf; | |
217 | ||
218 | switch (size) { | |
219 | case 1: | |
220 | buf.byte = data; | |
221 | break; | |
222 | case 2: | |
223 | buf.word = cpu_to_le16(data); | |
224 | break; | |
225 | case 4: | |
226 | buf.dword = cpu_to_le32(data); | |
227 | break; | |
38d49e8c JRZ |
228 | case 8: |
229 | buf.qword = cpu_to_le64(data); | |
230 | break; | |
e2c7d025 | 231 | default: |
c624b6b3 | 232 | hw_error("vfio: unsupported write size, %u bytes", size); |
e2c7d025 EA |
233 | break; |
234 | } | |
235 | ||
236 | if (pwrite(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) { | |
237 | error_report("%s(%s:region%d+0x%"HWADDR_PRIx", 0x%"PRIx64 | |
238 | ",%d) failed: %m", | |
239 | __func__, vbasedev->name, region->nr, | |
240 | addr, data, size); | |
241 | } | |
242 | ||
243 | trace_vfio_region_write(vbasedev->name, region->nr, addr, data, size); | |
244 | ||
245 | /* | |
246 | * A read or write to a BAR always signals an INTx EOI. This will | |
247 | * do nothing if not pending (including not in INTx mode). We assume | |
248 | * that a BAR access is in response to an interrupt and that BAR | |
249 | * accesses will service the interrupt. Unfortunately, we don't know | |
250 | * which access will service the interrupt, so we're potentially | |
251 | * getting quite a few host interrupts per guest interrupt. | |
252 | */ | |
253 | vbasedev->ops->vfio_eoi(vbasedev); | |
254 | } | |
255 | ||
256 | uint64_t vfio_region_read(void *opaque, | |
257 | hwaddr addr, unsigned size) | |
258 | { | |
259 | VFIORegion *region = opaque; | |
260 | VFIODevice *vbasedev = region->vbasedev; | |
261 | union { | |
262 | uint8_t byte; | |
263 | uint16_t word; | |
264 | uint32_t dword; | |
265 | uint64_t qword; | |
266 | } buf; | |
267 | uint64_t data = 0; | |
268 | ||
269 | if (pread(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) { | |
270 | error_report("%s(%s:region%d+0x%"HWADDR_PRIx", %d) failed: %m", | |
271 | __func__, vbasedev->name, region->nr, | |
272 | addr, size); | |
273 | return (uint64_t)-1; | |
274 | } | |
275 | switch (size) { | |
276 | case 1: | |
277 | data = buf.byte; | |
278 | break; | |
279 | case 2: | |
280 | data = le16_to_cpu(buf.word); | |
281 | break; | |
282 | case 4: | |
283 | data = le32_to_cpu(buf.dword); | |
284 | break; | |
38d49e8c JRZ |
285 | case 8: |
286 | data = le64_to_cpu(buf.qword); | |
287 | break; | |
e2c7d025 | 288 | default: |
c624b6b3 | 289 | hw_error("vfio: unsupported read size, %u bytes", size); |
e2c7d025 EA |
290 | break; |
291 | } | |
292 | ||
293 | trace_vfio_region_read(vbasedev->name, region->nr, addr, size, data); | |
294 | ||
295 | /* Same as write above */ | |
296 | vbasedev->ops->vfio_eoi(vbasedev); | |
297 | ||
298 | return data; | |
299 | } | |
300 | ||
301 | const MemoryRegionOps vfio_region_ops = { | |
302 | .read = vfio_region_read, | |
303 | .write = vfio_region_write, | |
304 | .endianness = DEVICE_LITTLE_ENDIAN, | |
15126cba JRZ |
305 | .valid = { |
306 | .min_access_size = 1, | |
307 | .max_access_size = 8, | |
308 | }, | |
38d49e8c JRZ |
309 | .impl = { |
310 | .min_access_size = 1, | |
311 | .max_access_size = 8, | |
312 | }, | |
e2c7d025 EA |
313 | }; |
314 | ||
b6dd6504 KW |
315 | /* |
316 | * Device state interfaces | |
317 | */ | |
318 | ||
3710586c KW |
319 | bool vfio_mig_active(void) |
320 | { | |
321 | VFIOGroup *group; | |
322 | VFIODevice *vbasedev; | |
323 | ||
324 | if (QLIST_EMPTY(&vfio_group_list)) { | |
325 | return false; | |
326 | } | |
327 | ||
328 | QLIST_FOREACH(group, &vfio_group_list, next) { | |
329 | QLIST_FOREACH(vbasedev, &group->device_list, next) { | |
330 | if (vbasedev->migration_blocker) { | |
331 | return false; | |
332 | } | |
333 | } | |
334 | } | |
335 | return true; | |
336 | } | |
337 | ||
758b96b6 | 338 | static bool vfio_devices_all_dirty_tracking(VFIOContainer *container) |
b6dd6504 KW |
339 | { |
340 | VFIOGroup *group; | |
341 | VFIODevice *vbasedev; | |
342 | MigrationState *ms = migrate_get_current(); | |
343 | ||
344 | if (!migration_is_setup_or_active(ms->state)) { | |
345 | return false; | |
346 | } | |
347 | ||
348 | QLIST_FOREACH(group, &container->group_list, container_next) { | |
349 | QLIST_FOREACH(vbasedev, &group->device_list, next) { | |
350 | VFIOMigration *migration = vbasedev->migration; | |
351 | ||
352 | if (!migration) { | |
353 | return false; | |
354 | } | |
355 | ||
758b96b6 KZ |
356 | if ((vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF) |
357 | && (migration->device_state & VFIO_DEVICE_STATE_RUNNING)) { | |
b6dd6504 KW |
358 | return false; |
359 | } | |
360 | } | |
361 | } | |
362 | return true; | |
363 | } | |
364 | ||
9e7b0442 KW |
365 | static bool vfio_devices_all_running_and_saving(VFIOContainer *container) |
366 | { | |
367 | VFIOGroup *group; | |
368 | VFIODevice *vbasedev; | |
369 | MigrationState *ms = migrate_get_current(); | |
370 | ||
371 | if (!migration_is_setup_or_active(ms->state)) { | |
372 | return false; | |
373 | } | |
374 | ||
375 | QLIST_FOREACH(group, &container->group_list, container_next) { | |
376 | QLIST_FOREACH(vbasedev, &group->device_list, next) { | |
377 | VFIOMigration *migration = vbasedev->migration; | |
378 | ||
379 | if (!migration) { | |
380 | return false; | |
381 | } | |
382 | ||
383 | if ((migration->device_state & VFIO_DEVICE_STATE_SAVING) && | |
384 | (migration->device_state & VFIO_DEVICE_STATE_RUNNING)) { | |
385 | continue; | |
386 | } else { | |
387 | return false; | |
388 | } | |
389 | } | |
390 | } | |
391 | return true; | |
392 | } | |
393 | ||
394 | static int vfio_dma_unmap_bitmap(VFIOContainer *container, | |
395 | hwaddr iova, ram_addr_t size, | |
396 | IOMMUTLBEntry *iotlb) | |
397 | { | |
398 | struct vfio_iommu_type1_dma_unmap *unmap; | |
399 | struct vfio_bitmap *bitmap; | |
8e3b0cbb | 400 | uint64_t pages = REAL_HOST_PAGE_ALIGN(size) / qemu_real_host_page_size(); |
9e7b0442 KW |
401 | int ret; |
402 | ||
403 | unmap = g_malloc0(sizeof(*unmap) + sizeof(*bitmap)); | |
404 | ||
405 | unmap->argsz = sizeof(*unmap) + sizeof(*bitmap); | |
406 | unmap->iova = iova; | |
407 | unmap->size = size; | |
408 | unmap->flags |= VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP; | |
409 | bitmap = (struct vfio_bitmap *)&unmap->data; | |
410 | ||
411 | /* | |
1eb7f642 KJ |
412 | * cpu_physical_memory_set_dirty_lebitmap() supports pages in bitmap of |
413 | * qemu_real_host_page_size to mark those dirty. Hence set bitmap_pgsize | |
414 | * to qemu_real_host_page_size. | |
9e7b0442 KW |
415 | */ |
416 | ||
8e3b0cbb | 417 | bitmap->pgsize = qemu_real_host_page_size(); |
9e7b0442 KW |
418 | bitmap->size = ROUND_UP(pages, sizeof(__u64) * BITS_PER_BYTE) / |
419 | BITS_PER_BYTE; | |
420 | ||
421 | if (bitmap->size > container->max_dirty_bitmap_size) { | |
422 | error_report("UNMAP: Size of bitmap too big 0x%"PRIx64, | |
423 | (uint64_t)bitmap->size); | |
424 | ret = -E2BIG; | |
425 | goto unmap_exit; | |
426 | } | |
427 | ||
428 | bitmap->data = g_try_malloc0(bitmap->size); | |
429 | if (!bitmap->data) { | |
430 | ret = -ENOMEM; | |
431 | goto unmap_exit; | |
432 | } | |
433 | ||
434 | ret = ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, unmap); | |
435 | if (!ret) { | |
436 | cpu_physical_memory_set_dirty_lebitmap((unsigned long *)bitmap->data, | |
437 | iotlb->translated_addr, pages); | |
438 | } else { | |
439 | error_report("VFIO_UNMAP_DMA with DIRTY_BITMAP : %m"); | |
440 | } | |
441 | ||
442 | g_free(bitmap->data); | |
443 | unmap_exit: | |
444 | g_free(unmap); | |
445 | return ret; | |
446 | } | |
447 | ||
e2c7d025 EA |
448 | /* |
449 | * DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86 | |
450 | */ | |
451 | static int vfio_dma_unmap(VFIOContainer *container, | |
9e7b0442 KW |
452 | hwaddr iova, ram_addr_t size, |
453 | IOMMUTLBEntry *iotlb) | |
e2c7d025 EA |
454 | { |
455 | struct vfio_iommu_type1_dma_unmap unmap = { | |
456 | .argsz = sizeof(unmap), | |
457 | .flags = 0, | |
458 | .iova = iova, | |
459 | .size = size, | |
460 | }; | |
461 | ||
9e7b0442 KW |
462 | if (iotlb && container->dirty_pages_supported && |
463 | vfio_devices_all_running_and_saving(container)) { | |
464 | return vfio_dma_unmap_bitmap(container, iova, size, iotlb); | |
465 | } | |
466 | ||
567d7d3e AW |
467 | while (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) { |
468 | /* | |
469 | * The type1 backend has an off-by-one bug in the kernel (71a7d3d78e3c | |
470 | * v4.15) where an overflow in its wrap-around check prevents us from | |
471 | * unmapping the last page of the address space. Test for the error | |
472 | * condition and re-try the unmap excluding the last page. The | |
473 | * expectation is that we've never mapped the last page anyway and this | |
474 | * unmap request comes via vIOMMU support which also makes it unlikely | |
475 | * that this page is used. This bug was introduced well after type1 v2 | |
476 | * support was introduced, so we shouldn't need to test for v1. A fix | |
477 | * is queued for kernel v5.0 so this workaround can be removed once | |
478 | * affected kernels are sufficiently deprecated. | |
479 | */ | |
480 | if (errno == EINVAL && unmap.size && !(unmap.iova + unmap.size) && | |
481 | container->iommu_type == VFIO_TYPE1v2_IOMMU) { | |
482 | trace_vfio_dma_unmap_overflow_workaround(); | |
483 | unmap.size -= 1ULL << ctz64(container->pgsizes); | |
484 | continue; | |
485 | } | |
b09d51c9 | 486 | error_report("VFIO_UNMAP_DMA failed: %s", strerror(errno)); |
e2c7d025 EA |
487 | return -errno; |
488 | } | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static int vfio_dma_map(VFIOContainer *container, hwaddr iova, | |
494 | ram_addr_t size, void *vaddr, bool readonly) | |
495 | { | |
496 | struct vfio_iommu_type1_dma_map map = { | |
497 | .argsz = sizeof(map), | |
498 | .flags = VFIO_DMA_MAP_FLAG_READ, | |
499 | .vaddr = (__u64)(uintptr_t)vaddr, | |
500 | .iova = iova, | |
501 | .size = size, | |
502 | }; | |
503 | ||
504 | if (!readonly) { | |
505 | map.flags |= VFIO_DMA_MAP_FLAG_WRITE; | |
506 | } | |
507 | ||
508 | /* | |
509 | * Try the mapping, if it fails with EBUSY, unmap the region and try | |
510 | * again. This shouldn't be necessary, but we sometimes see it in | |
b6af0975 | 511 | * the VGA ROM space. |
e2c7d025 EA |
512 | */ |
513 | if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 || | |
9e7b0442 | 514 | (errno == EBUSY && vfio_dma_unmap(container, iova, size, NULL) == 0 && |
e2c7d025 EA |
515 | ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) { |
516 | return 0; | |
517 | } | |
518 | ||
b09d51c9 | 519 | error_report("VFIO_MAP_DMA failed: %s", strerror(errno)); |
e2c7d025 EA |
520 | return -errno; |
521 | } | |
522 | ||
f4ec5e26 AK |
523 | static void vfio_host_win_add(VFIOContainer *container, |
524 | hwaddr min_iova, hwaddr max_iova, | |
525 | uint64_t iova_pgsizes) | |
526 | { | |
527 | VFIOHostDMAWindow *hostwin; | |
528 | ||
529 | QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { | |
530 | if (ranges_overlap(hostwin->min_iova, | |
531 | hostwin->max_iova - hostwin->min_iova + 1, | |
532 | min_iova, | |
533 | max_iova - min_iova + 1)) { | |
534 | hw_error("%s: Overlapped IOMMU are not enabled", __func__); | |
535 | } | |
536 | } | |
537 | ||
538 | hostwin = g_malloc0(sizeof(*hostwin)); | |
539 | ||
540 | hostwin->min_iova = min_iova; | |
541 | hostwin->max_iova = max_iova; | |
542 | hostwin->iova_pgsizes = iova_pgsizes; | |
543 | QLIST_INSERT_HEAD(&container->hostwin_list, hostwin, hostwin_next); | |
544 | } | |
545 | ||
2e4109de AK |
546 | static int vfio_host_win_del(VFIOContainer *container, hwaddr min_iova, |
547 | hwaddr max_iova) | |
548 | { | |
549 | VFIOHostDMAWindow *hostwin; | |
550 | ||
551 | QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { | |
552 | if (hostwin->min_iova == min_iova && hostwin->max_iova == max_iova) { | |
553 | QLIST_REMOVE(hostwin, hostwin_next); | |
f3bc3a73 | 554 | g_free(hostwin); |
2e4109de AK |
555 | return 0; |
556 | } | |
557 | } | |
558 | ||
559 | return -1; | |
560 | } | |
561 | ||
e2c7d025 EA |
562 | static bool vfio_listener_skipped_section(MemoryRegionSection *section) |
563 | { | |
564 | return (!memory_region_is_ram(section->mr) && | |
565 | !memory_region_is_iommu(section->mr)) || | |
56918a12 | 566 | memory_region_is_protected(section->mr) || |
e2c7d025 EA |
567 | /* |
568 | * Sizing an enabled 64-bit BAR can cause spurious mappings to | |
569 | * addresses in the upper part of the 64-bit address space. These | |
570 | * are never accessed by the CPU and beyond the address width of | |
571 | * some IOMMU hardware. TODO: VFIO should tell us the IOMMU width. | |
572 | */ | |
573 | section->offset_within_address_space & (1ULL << 63); | |
574 | } | |
575 | ||
4a4b88fb | 576 | /* Called with rcu_read_lock held. */ |
9a04fe09 KW |
577 | static bool vfio_get_xlat_addr(IOMMUTLBEntry *iotlb, void **vaddr, |
578 | ram_addr_t *ram_addr, bool *read_only) | |
e2c7d025 | 579 | { |
e2c7d025 EA |
580 | MemoryRegion *mr; |
581 | hwaddr xlat; | |
582 | hwaddr len = iotlb->addr_mask + 1; | |
4a4b88fb | 583 | bool writable = iotlb->perm & IOMMU_WO; |
f1f93650 | 584 | |
e2c7d025 EA |
585 | /* |
586 | * The IOMMU TLB entry we have just covers translation through | |
587 | * this IOMMU to its immediate target. We need to translate | |
588 | * it the rest of the way through to memory. | |
589 | */ | |
590 | mr = address_space_translate(&address_space_memory, | |
591 | iotlb->translated_addr, | |
bc6b1cec PM |
592 | &xlat, &len, writable, |
593 | MEMTXATTRS_UNSPECIFIED); | |
e2c7d025 | 594 | if (!memory_region_is_ram(mr)) { |
78e5b17f | 595 | error_report("iommu map to non memory area %"HWADDR_PRIx"", |
e2c7d025 | 596 | xlat); |
4a4b88fb | 597 | return false; |
0fd7616e DH |
598 | } else if (memory_region_has_ram_discard_manager(mr)) { |
599 | RamDiscardManager *rdm = memory_region_get_ram_discard_manager(mr); | |
600 | MemoryRegionSection tmp = { | |
601 | .mr = mr, | |
602 | .offset_within_region = xlat, | |
603 | .size = int128_make64(len), | |
604 | }; | |
605 | ||
606 | /* | |
607 | * Malicious VMs can map memory into the IOMMU, which is expected | |
608 | * to remain discarded. vfio will pin all pages, populating memory. | |
609 | * Disallow that. vmstate priorities make sure any RamDiscardManager | |
610 | * were already restored before IOMMUs are restored. | |
611 | */ | |
612 | if (!ram_discard_manager_is_populated(rdm, &tmp)) { | |
613 | error_report("iommu map to discarded memory (e.g., unplugged via" | |
614 | " virtio-mem): %"HWADDR_PRIx"", | |
615 | iotlb->translated_addr); | |
616 | return false; | |
617 | } | |
618 | ||
619 | /* | |
620 | * Malicious VMs might trigger discarding of IOMMU-mapped memory. The | |
621 | * pages will remain pinned inside vfio until unmapped, resulting in a | |
622 | * higher memory consumption than expected. If memory would get | |
623 | * populated again later, there would be an inconsistency between pages | |
624 | * pinned by vfio and pages seen by QEMU. This is the case until | |
625 | * unmapped from the IOMMU (e.g., during device reset). | |
626 | * | |
627 | * With malicious guests, we really only care about pinning more memory | |
628 | * than expected. RLIMIT_MEMLOCK set for the user/process can never be | |
629 | * exceeded and can be used to mitigate this problem. | |
630 | */ | |
631 | warn_report_once("Using vfio with vIOMMUs and coordinated discarding of" | |
632 | " RAM (e.g., virtio-mem) works, however, malicious" | |
633 | " guests can trigger pinning of more memory than" | |
634 | " intended via an IOMMU. It's possible to mitigate " | |
635 | " by setting/adjusting RLIMIT_MEMLOCK."); | |
e2c7d025 | 636 | } |
4a4b88fb | 637 | |
e2c7d025 EA |
638 | /* |
639 | * Translation truncates length to the IOMMU page size, | |
640 | * check that it did not truncate too much. | |
641 | */ | |
642 | if (len & iotlb->addr_mask) { | |
78e5b17f | 643 | error_report("iommu has granularity incompatible with target AS"); |
4a4b88fb PX |
644 | return false; |
645 | } | |
646 | ||
9a04fe09 KW |
647 | if (vaddr) { |
648 | *vaddr = memory_region_get_ram_ptr(mr) + xlat; | |
649 | } | |
650 | ||
651 | if (ram_addr) { | |
652 | *ram_addr = memory_region_get_ram_addr(mr) + xlat; | |
653 | } | |
654 | ||
655 | if (read_only) { | |
656 | *read_only = !writable || mr->readonly; | |
657 | } | |
4a4b88fb PX |
658 | |
659 | return true; | |
660 | } | |
661 | ||
662 | static void vfio_iommu_map_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb) | |
663 | { | |
664 | VFIOGuestIOMMU *giommu = container_of(n, VFIOGuestIOMMU, n); | |
665 | VFIOContainer *container = giommu->container; | |
666 | hwaddr iova = iotlb->iova + giommu->iommu_offset; | |
4a4b88fb PX |
667 | void *vaddr; |
668 | int ret; | |
669 | ||
670 | trace_vfio_iommu_map_notify(iotlb->perm == IOMMU_NONE ? "UNMAP" : "MAP", | |
671 | iova, iova + iotlb->addr_mask); | |
672 | ||
673 | if (iotlb->target_as != &address_space_memory) { | |
674 | error_report("Wrong target AS \"%s\", only system memory is allowed", | |
675 | iotlb->target_as->name ? iotlb->target_as->name : "none"); | |
676 | return; | |
677 | } | |
678 | ||
679 | rcu_read_lock(); | |
680 | ||
e2c7d025 | 681 | if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) { |
9a04fe09 KW |
682 | bool read_only; |
683 | ||
684 | if (!vfio_get_xlat_addr(iotlb, &vaddr, NULL, &read_only)) { | |
dfbd90e5 PX |
685 | goto out; |
686 | } | |
4a4b88fb PX |
687 | /* |
688 | * vaddr is only valid until rcu_read_unlock(). But after | |
689 | * vfio_dma_map has set up the mapping the pages will be | |
690 | * pinned by the kernel. This makes sure that the RAM backend | |
691 | * of vaddr will always be there, even if the memory object is | |
692 | * destroyed and its backing memory munmap-ed. | |
693 | */ | |
d78c19b5 | 694 | ret = vfio_dma_map(container, iova, |
e2c7d025 | 695 | iotlb->addr_mask + 1, vaddr, |
4a4b88fb | 696 | read_only); |
e2c7d025 EA |
697 | if (ret) { |
698 | error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", " | |
699 | "0x%"HWADDR_PRIx", %p) = %d (%m)", | |
d78c19b5 | 700 | container, iova, |
e2c7d025 EA |
701 | iotlb->addr_mask + 1, vaddr, ret); |
702 | } | |
703 | } else { | |
9e7b0442 | 704 | ret = vfio_dma_unmap(container, iova, iotlb->addr_mask + 1, iotlb); |
e2c7d025 EA |
705 | if (ret) { |
706 | error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", " | |
707 | "0x%"HWADDR_PRIx") = %d (%m)", | |
d78c19b5 | 708 | container, iova, |
e2c7d025 EA |
709 | iotlb->addr_mask + 1, ret); |
710 | } | |
711 | } | |
41063e1e PB |
712 | out: |
713 | rcu_read_unlock(); | |
e2c7d025 EA |
714 | } |
715 | ||
5e3b981c DH |
716 | static void vfio_ram_discard_notify_discard(RamDiscardListener *rdl, |
717 | MemoryRegionSection *section) | |
718 | { | |
719 | VFIORamDiscardListener *vrdl = container_of(rdl, VFIORamDiscardListener, | |
720 | listener); | |
721 | const hwaddr size = int128_get64(section->size); | |
722 | const hwaddr iova = section->offset_within_address_space; | |
723 | int ret; | |
724 | ||
725 | /* Unmap with a single call. */ | |
726 | ret = vfio_dma_unmap(vrdl->container, iova, size , NULL); | |
727 | if (ret) { | |
728 | error_report("%s: vfio_dma_unmap() failed: %s", __func__, | |
729 | strerror(-ret)); | |
730 | } | |
731 | } | |
732 | ||
733 | static int vfio_ram_discard_notify_populate(RamDiscardListener *rdl, | |
734 | MemoryRegionSection *section) | |
735 | { | |
736 | VFIORamDiscardListener *vrdl = container_of(rdl, VFIORamDiscardListener, | |
737 | listener); | |
738 | const hwaddr end = section->offset_within_region + | |
739 | int128_get64(section->size); | |
740 | hwaddr start, next, iova; | |
741 | void *vaddr; | |
742 | int ret; | |
743 | ||
744 | /* | |
745 | * Map in (aligned within memory region) minimum granularity, so we can | |
746 | * unmap in minimum granularity later. | |
747 | */ | |
748 | for (start = section->offset_within_region; start < end; start = next) { | |
749 | next = ROUND_UP(start + 1, vrdl->granularity); | |
750 | next = MIN(next, end); | |
751 | ||
752 | iova = start - section->offset_within_region + | |
753 | section->offset_within_address_space; | |
754 | vaddr = memory_region_get_ram_ptr(section->mr) + start; | |
755 | ||
756 | ret = vfio_dma_map(vrdl->container, iova, next - start, | |
757 | vaddr, section->readonly); | |
758 | if (ret) { | |
759 | /* Rollback */ | |
760 | vfio_ram_discard_notify_discard(rdl, section); | |
761 | return ret; | |
762 | } | |
763 | } | |
764 | return 0; | |
765 | } | |
766 | ||
767 | static void vfio_register_ram_discard_listener(VFIOContainer *container, | |
768 | MemoryRegionSection *section) | |
769 | { | |
770 | RamDiscardManager *rdm = memory_region_get_ram_discard_manager(section->mr); | |
771 | VFIORamDiscardListener *vrdl; | |
772 | ||
773 | /* Ignore some corner cases not relevant in practice. */ | |
774 | g_assert(QEMU_IS_ALIGNED(section->offset_within_region, TARGET_PAGE_SIZE)); | |
775 | g_assert(QEMU_IS_ALIGNED(section->offset_within_address_space, | |
776 | TARGET_PAGE_SIZE)); | |
777 | g_assert(QEMU_IS_ALIGNED(int128_get64(section->size), TARGET_PAGE_SIZE)); | |
778 | ||
779 | vrdl = g_new0(VFIORamDiscardListener, 1); | |
780 | vrdl->container = container; | |
781 | vrdl->mr = section->mr; | |
782 | vrdl->offset_within_address_space = section->offset_within_address_space; | |
783 | vrdl->size = int128_get64(section->size); | |
784 | vrdl->granularity = ram_discard_manager_get_min_granularity(rdm, | |
785 | section->mr); | |
786 | ||
787 | g_assert(vrdl->granularity && is_power_of_2(vrdl->granularity)); | |
a5dba9bc DH |
788 | g_assert(container->pgsizes && |
789 | vrdl->granularity >= 1ULL << ctz64(container->pgsizes)); | |
5e3b981c DH |
790 | |
791 | ram_discard_listener_init(&vrdl->listener, | |
792 | vfio_ram_discard_notify_populate, | |
793 | vfio_ram_discard_notify_discard, true); | |
794 | ram_discard_manager_register_listener(rdm, &vrdl->listener, section); | |
795 | QLIST_INSERT_HEAD(&container->vrdl_list, vrdl, next); | |
a74317f6 DH |
796 | |
797 | /* | |
798 | * Sanity-check if we have a theoretically problematic setup where we could | |
799 | * exceed the maximum number of possible DMA mappings over time. We assume | |
800 | * that each mapped section in the same address space as a RamDiscardManager | |
801 | * section consumes exactly one DMA mapping, with the exception of | |
802 | * RamDiscardManager sections; i.e., we don't expect to have gIOMMU sections | |
803 | * in the same address space as RamDiscardManager sections. | |
804 | * | |
805 | * We assume that each section in the address space consumes one memslot. | |
806 | * We take the number of KVM memory slots as a best guess for the maximum | |
807 | * number of sections in the address space we could have over time, | |
808 | * also consuming DMA mappings. | |
809 | */ | |
810 | if (container->dma_max_mappings) { | |
811 | unsigned int vrdl_count = 0, vrdl_mappings = 0, max_memslots = 512; | |
812 | ||
813 | #ifdef CONFIG_KVM | |
814 | if (kvm_enabled()) { | |
815 | max_memslots = kvm_get_max_memslots(); | |
816 | } | |
817 | #endif | |
818 | ||
819 | QLIST_FOREACH(vrdl, &container->vrdl_list, next) { | |
820 | hwaddr start, end; | |
821 | ||
822 | start = QEMU_ALIGN_DOWN(vrdl->offset_within_address_space, | |
823 | vrdl->granularity); | |
824 | end = ROUND_UP(vrdl->offset_within_address_space + vrdl->size, | |
825 | vrdl->granularity); | |
826 | vrdl_mappings += (end - start) / vrdl->granularity; | |
827 | vrdl_count++; | |
828 | } | |
829 | ||
830 | if (vrdl_mappings + max_memslots - vrdl_count > | |
831 | container->dma_max_mappings) { | |
832 | warn_report("%s: possibly running out of DMA mappings. E.g., try" | |
833 | " increasing the 'block-size' of virtio-mem devies." | |
834 | " Maximum possible DMA mappings: %d, Maximum possible" | |
835 | " memslots: %d", __func__, container->dma_max_mappings, | |
836 | max_memslots); | |
837 | } | |
838 | } | |
5e3b981c DH |
839 | } |
840 | ||
841 | static void vfio_unregister_ram_discard_listener(VFIOContainer *container, | |
842 | MemoryRegionSection *section) | |
843 | { | |
844 | RamDiscardManager *rdm = memory_region_get_ram_discard_manager(section->mr); | |
845 | VFIORamDiscardListener *vrdl = NULL; | |
846 | ||
847 | QLIST_FOREACH(vrdl, &container->vrdl_list, next) { | |
848 | if (vrdl->mr == section->mr && | |
849 | vrdl->offset_within_address_space == | |
850 | section->offset_within_address_space) { | |
851 | break; | |
852 | } | |
853 | } | |
854 | ||
855 | if (!vrdl) { | |
856 | hw_error("vfio: Trying to unregister missing RAM discard listener"); | |
857 | } | |
858 | ||
859 | ram_discard_manager_unregister_listener(rdm, &vrdl->listener); | |
860 | QLIST_REMOVE(vrdl, next); | |
861 | g_free(vrdl); | |
862 | } | |
863 | ||
e2c7d025 EA |
864 | static void vfio_listener_region_add(MemoryListener *listener, |
865 | MemoryRegionSection *section) | |
866 | { | |
ee0bf0e5 | 867 | VFIOContainer *container = container_of(listener, VFIOContainer, listener); |
e2c7d025 | 868 | hwaddr iova, end; |
55efcc53 | 869 | Int128 llend, llsize; |
e2c7d025 EA |
870 | void *vaddr; |
871 | int ret; | |
f4ec5e26 AK |
872 | VFIOHostDMAWindow *hostwin; |
873 | bool hostwin_found; | |
d7d87836 | 874 | Error *err = NULL; |
e2c7d025 EA |
875 | |
876 | if (vfio_listener_skipped_section(section)) { | |
877 | trace_vfio_listener_region_add_skip( | |
878 | section->offset_within_address_space, | |
879 | section->offset_within_address_space + | |
880 | int128_get64(int128_sub(section->size, int128_one()))); | |
881 | return; | |
882 | } | |
883 | ||
1eb7f642 | 884 | if (unlikely((section->offset_within_address_space & |
8e3b0cbb MAL |
885 | ~qemu_real_host_page_mask()) != |
886 | (section->offset_within_region & ~qemu_real_host_page_mask()))) { | |
e2c7d025 EA |
887 | error_report("%s received unaligned region", __func__); |
888 | return; | |
889 | } | |
890 | ||
1eb7f642 | 891 | iova = REAL_HOST_PAGE_ALIGN(section->offset_within_address_space); |
e2c7d025 EA |
892 | llend = int128_make64(section->offset_within_address_space); |
893 | llend = int128_add(llend, section->size); | |
8e3b0cbb | 894 | llend = int128_and(llend, int128_exts64(qemu_real_host_page_mask())); |
e2c7d025 EA |
895 | |
896 | if (int128_ge(int128_make64(iova), llend)) { | |
e4b34708 KJ |
897 | if (memory_region_is_ram_device(section->mr)) { |
898 | trace_vfio_listener_region_add_no_dma_map( | |
899 | memory_region_name(section->mr), | |
900 | section->offset_within_address_space, | |
901 | int128_getlo(section->size), | |
8e3b0cbb | 902 | qemu_real_host_page_size()); |
e4b34708 | 903 | } |
e2c7d025 EA |
904 | return; |
905 | } | |
55efcc53 | 906 | end = int128_get64(int128_sub(llend, int128_one())); |
3898aad3 | 907 | |
2e4109de | 908 | if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) { |
2e4109de AK |
909 | hwaddr pgsize = 0; |
910 | ||
911 | /* For now intersections are not allowed, we may relax this later */ | |
912 | QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { | |
913 | if (ranges_overlap(hostwin->min_iova, | |
914 | hostwin->max_iova - hostwin->min_iova + 1, | |
915 | section->offset_within_address_space, | |
916 | int128_get64(section->size))) { | |
d7d87836 EA |
917 | error_setg(&err, |
918 | "region [0x%"PRIx64",0x%"PRIx64"] overlaps with existing" | |
919 | "host DMA window [0x%"PRIx64",0x%"PRIx64"]", | |
920 | section->offset_within_address_space, | |
921 | section->offset_within_address_space + | |
922 | int128_get64(section->size) - 1, | |
923 | hostwin->min_iova, hostwin->max_iova); | |
2e4109de AK |
924 | goto fail; |
925 | } | |
926 | } | |
927 | ||
928 | ret = vfio_spapr_create_window(container, section, &pgsize); | |
929 | if (ret) { | |
d7d87836 | 930 | error_setg_errno(&err, -ret, "Failed to create SPAPR window"); |
2e4109de AK |
931 | goto fail; |
932 | } | |
933 | ||
934 | vfio_host_win_add(container, section->offset_within_address_space, | |
935 | section->offset_within_address_space + | |
936 | int128_get64(section->size) - 1, pgsize); | |
07bc681a AK |
937 | #ifdef CONFIG_KVM |
938 | if (kvm_enabled()) { | |
939 | VFIOGroup *group; | |
940 | IOMMUMemoryRegion *iommu_mr = IOMMU_MEMORY_REGION(section->mr); | |
941 | struct kvm_vfio_spapr_tce param; | |
942 | struct kvm_device_attr attr = { | |
943 | .group = KVM_DEV_VFIO_GROUP, | |
944 | .attr = KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE, | |
945 | .addr = (uint64_t)(unsigned long)¶m, | |
946 | }; | |
947 | ||
948 | if (!memory_region_iommu_get_attr(iommu_mr, IOMMU_ATTR_SPAPR_TCE_FD, | |
949 | ¶m.tablefd)) { | |
950 | QLIST_FOREACH(group, &container->group_list, container_next) { | |
951 | param.groupfd = group->fd; | |
952 | if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) { | |
953 | error_report("vfio: failed to setup fd %d " | |
954 | "for a group with fd %d: %s", | |
955 | param.tablefd, param.groupfd, | |
956 | strerror(errno)); | |
957 | return; | |
958 | } | |
959 | trace_vfio_spapr_group_attach(param.groupfd, param.tablefd); | |
960 | } | |
961 | } | |
962 | } | |
963 | #endif | |
2e4109de AK |
964 | } |
965 | ||
f4ec5e26 AK |
966 | hostwin_found = false; |
967 | QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { | |
968 | if (hostwin->min_iova <= iova && end <= hostwin->max_iova) { | |
969 | hostwin_found = true; | |
970 | break; | |
971 | } | |
972 | } | |
973 | ||
974 | if (!hostwin_found) { | |
d7d87836 EA |
975 | error_setg(&err, "Container %p can't map guest IOVA region" |
976 | " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx, container, iova, end); | |
3898aad3 DG |
977 | goto fail; |
978 | } | |
e2c7d025 EA |
979 | |
980 | memory_region_ref(section->mr); | |
981 | ||
982 | if (memory_region_is_iommu(section->mr)) { | |
983 | VFIOGuestIOMMU *giommu; | |
3df9d748 | 984 | IOMMUMemoryRegion *iommu_mr = IOMMU_MEMORY_REGION(section->mr); |
cb1efcf4 | 985 | int iommu_idx; |
e2c7d025 | 986 | |
55efcc53 | 987 | trace_vfio_listener_region_add_iommu(iova, end); |
e2c7d025 | 988 | /* |
e2c7d025 EA |
989 | * FIXME: For VFIO iommu types which have KVM acceleration to |
990 | * avoid bouncing all map/unmaps through qemu this way, this | |
991 | * would be the right place to wire that up (tell the KVM | |
992 | * device emulation the VFIO iommu handles to use). | |
993 | */ | |
e2c7d025 | 994 | giommu = g_malloc0(sizeof(*giommu)); |
3df9d748 | 995 | giommu->iommu = iommu_mr; |
d78c19b5 AK |
996 | giommu->iommu_offset = section->offset_within_address_space - |
997 | section->offset_within_region; | |
e2c7d025 | 998 | giommu->container = container; |
698feb5e PX |
999 | llend = int128_add(int128_make64(section->offset_within_region), |
1000 | section->size); | |
1001 | llend = int128_sub(llend, int128_one()); | |
cb1efcf4 PM |
1002 | iommu_idx = memory_region_iommu_attrs_to_index(iommu_mr, |
1003 | MEMTXATTRS_UNSPECIFIED); | |
698feb5e | 1004 | iommu_notifier_init(&giommu->n, vfio_iommu_map_notify, |
8dca037b | 1005 | IOMMU_NOTIFIER_IOTLB_EVENTS, |
698feb5e | 1006 | section->offset_within_region, |
cb1efcf4 PM |
1007 | int128_get64(llend), |
1008 | iommu_idx); | |
508ce5eb | 1009 | |
b9177498 BB |
1010 | ret = memory_region_iommu_set_page_size_mask(giommu->iommu, |
1011 | container->pgsizes, | |
1012 | &err); | |
1013 | if (ret) { | |
1014 | g_free(giommu); | |
1015 | goto fail; | |
1016 | } | |
1017 | ||
549d4005 EA |
1018 | ret = memory_region_register_iommu_notifier(section->mr, &giommu->n, |
1019 | &err); | |
1020 | if (ret) { | |
1021 | g_free(giommu); | |
1022 | goto fail; | |
1023 | } | |
1024 | QLIST_INSERT_HEAD(&container->giommu_list, giommu, giommu_next); | |
ad523590 | 1025 | memory_region_iommu_replay(giommu->iommu, &giommu->n); |
e2c7d025 EA |
1026 | |
1027 | return; | |
1028 | } | |
1029 | ||
1030 | /* Here we assume that memory_region_is_ram(section->mr)==true */ | |
1031 | ||
5e3b981c DH |
1032 | /* |
1033 | * For RAM memory regions with a RamDiscardManager, we only want to map the | |
1034 | * actually populated parts - and update the mapping whenever we're notified | |
1035 | * about changes. | |
1036 | */ | |
1037 | if (memory_region_has_ram_discard_manager(section->mr)) { | |
1038 | vfio_register_ram_discard_listener(container, section); | |
1039 | return; | |
1040 | } | |
1041 | ||
e2c7d025 EA |
1042 | vaddr = memory_region_get_ram_ptr(section->mr) + |
1043 | section->offset_within_region + | |
1044 | (iova - section->offset_within_address_space); | |
1045 | ||
55efcc53 | 1046 | trace_vfio_listener_region_add_ram(iova, end, vaddr); |
e2c7d025 | 1047 | |
55efcc53 BD |
1048 | llsize = int128_sub(llend, int128_make64(iova)); |
1049 | ||
567b5b30 AK |
1050 | if (memory_region_is_ram_device(section->mr)) { |
1051 | hwaddr pgmask = (1ULL << ctz64(hostwin->iova_pgsizes)) - 1; | |
1052 | ||
1053 | if ((iova & pgmask) || (int128_get64(llsize) & pgmask)) { | |
5c086005 EA |
1054 | trace_vfio_listener_region_add_no_dma_map( |
1055 | memory_region_name(section->mr), | |
1056 | section->offset_within_address_space, | |
1057 | int128_getlo(section->size), | |
1058 | pgmask + 1); | |
567b5b30 AK |
1059 | return; |
1060 | } | |
1061 | } | |
1062 | ||
55efcc53 BD |
1063 | ret = vfio_dma_map(container, iova, int128_get64(llsize), |
1064 | vaddr, section->readonly); | |
e2c7d025 | 1065 | if (ret) { |
d7d87836 EA |
1066 | error_setg(&err, "vfio_dma_map(%p, 0x%"HWADDR_PRIx", " |
1067 | "0x%"HWADDR_PRIx", %p) = %d (%m)", | |
1068 | container, iova, int128_get64(llsize), vaddr, ret); | |
567b5b30 AK |
1069 | if (memory_region_is_ram_device(section->mr)) { |
1070 | /* Allow unexpected mappings not to be fatal for RAM devices */ | |
d7d87836 | 1071 | error_report_err(err); |
567b5b30 AK |
1072 | return; |
1073 | } | |
ac6dc389 DG |
1074 | goto fail; |
1075 | } | |
e2c7d025 | 1076 | |
ac6dc389 DG |
1077 | return; |
1078 | ||
1079 | fail: | |
567b5b30 AK |
1080 | if (memory_region_is_ram_device(section->mr)) { |
1081 | error_report("failed to vfio_dma_map. pci p2p may not work"); | |
1082 | return; | |
1083 | } | |
ac6dc389 DG |
1084 | /* |
1085 | * On the initfn path, store the first error in the container so we | |
1086 | * can gracefully fail. Runtime, there's not much we can do other | |
1087 | * than throw a hardware error. | |
1088 | */ | |
1089 | if (!container->initialized) { | |
1090 | if (!container->error) { | |
d7d87836 EA |
1091 | error_propagate_prepend(&container->error, err, |
1092 | "Region %s: ", | |
1093 | memory_region_name(section->mr)); | |
1094 | } else { | |
1095 | error_free(err); | |
e2c7d025 | 1096 | } |
ac6dc389 | 1097 | } else { |
d7d87836 | 1098 | error_report_err(err); |
ac6dc389 | 1099 | hw_error("vfio: DMA mapping failed, unable to continue"); |
e2c7d025 EA |
1100 | } |
1101 | } | |
1102 | ||
1103 | static void vfio_listener_region_del(MemoryListener *listener, | |
1104 | MemoryRegionSection *section) | |
1105 | { | |
ee0bf0e5 | 1106 | VFIOContainer *container = container_of(listener, VFIOContainer, listener); |
e2c7d025 | 1107 | hwaddr iova, end; |
7a057b4f | 1108 | Int128 llend, llsize; |
e2c7d025 | 1109 | int ret; |
567b5b30 | 1110 | bool try_unmap = true; |
e2c7d025 EA |
1111 | |
1112 | if (vfio_listener_skipped_section(section)) { | |
1113 | trace_vfio_listener_region_del_skip( | |
1114 | section->offset_within_address_space, | |
1115 | section->offset_within_address_space + | |
1116 | int128_get64(int128_sub(section->size, int128_one()))); | |
1117 | return; | |
1118 | } | |
1119 | ||
1eb7f642 | 1120 | if (unlikely((section->offset_within_address_space & |
8e3b0cbb MAL |
1121 | ~qemu_real_host_page_mask()) != |
1122 | (section->offset_within_region & ~qemu_real_host_page_mask()))) { | |
e2c7d025 EA |
1123 | error_report("%s received unaligned region", __func__); |
1124 | return; | |
1125 | } | |
1126 | ||
1127 | if (memory_region_is_iommu(section->mr)) { | |
1128 | VFIOGuestIOMMU *giommu; | |
1129 | ||
1130 | QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) { | |
3df9d748 | 1131 | if (MEMORY_REGION(giommu->iommu) == section->mr && |
698feb5e | 1132 | giommu->n.start == section->offset_within_region) { |
3df9d748 | 1133 | memory_region_unregister_iommu_notifier(section->mr, |
d22d8956 | 1134 | &giommu->n); |
e2c7d025 EA |
1135 | QLIST_REMOVE(giommu, giommu_next); |
1136 | g_free(giommu); | |
1137 | break; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * FIXME: We assume the one big unmap below is adequate to | |
1143 | * remove any individual page mappings in the IOMMU which | |
1144 | * might have been copied into VFIO. This works for a page table | |
1145 | * based IOMMU where a big unmap flattens a large range of IO-PTEs. | |
1146 | * That may not be true for all IOMMU types. | |
1147 | */ | |
1148 | } | |
1149 | ||
1eb7f642 | 1150 | iova = REAL_HOST_PAGE_ALIGN(section->offset_within_address_space); |
7a057b4f AK |
1151 | llend = int128_make64(section->offset_within_address_space); |
1152 | llend = int128_add(llend, section->size); | |
8e3b0cbb | 1153 | llend = int128_and(llend, int128_exts64(qemu_real_host_page_mask())); |
e2c7d025 | 1154 | |
7a057b4f | 1155 | if (int128_ge(int128_make64(iova), llend)) { |
e2c7d025 EA |
1156 | return; |
1157 | } | |
7a057b4f AK |
1158 | end = int128_get64(int128_sub(llend, int128_one())); |
1159 | ||
1160 | llsize = int128_sub(llend, int128_make64(iova)); | |
e2c7d025 | 1161 | |
7a057b4f | 1162 | trace_vfio_listener_region_del(iova, end); |
e2c7d025 | 1163 | |
567b5b30 AK |
1164 | if (memory_region_is_ram_device(section->mr)) { |
1165 | hwaddr pgmask; | |
1166 | VFIOHostDMAWindow *hostwin; | |
1167 | bool hostwin_found = false; | |
1168 | ||
1169 | QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { | |
1170 | if (hostwin->min_iova <= iova && end <= hostwin->max_iova) { | |
1171 | hostwin_found = true; | |
1172 | break; | |
1173 | } | |
1174 | } | |
1175 | assert(hostwin_found); /* or region_add() would have failed */ | |
1176 | ||
1177 | pgmask = (1ULL << ctz64(hostwin->iova_pgsizes)) - 1; | |
1178 | try_unmap = !((iova & pgmask) || (int128_get64(llsize) & pgmask)); | |
5e3b981c DH |
1179 | } else if (memory_region_has_ram_discard_manager(section->mr)) { |
1180 | vfio_unregister_ram_discard_listener(container, section); | |
1181 | /* Unregistering will trigger an unmap. */ | |
1182 | try_unmap = false; | |
e2c7d025 | 1183 | } |
2e4109de | 1184 | |
567b5b30 | 1185 | if (try_unmap) { |
1b296c3d JPB |
1186 | if (int128_eq(llsize, int128_2_64())) { |
1187 | /* The unmap ioctl doesn't accept a full 64-bit span. */ | |
1188 | llsize = int128_rshift(llsize, 1); | |
1189 | ret = vfio_dma_unmap(container, iova, int128_get64(llsize), NULL); | |
1190 | if (ret) { | |
1191 | error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", " | |
1192 | "0x%"HWADDR_PRIx") = %d (%m)", | |
1193 | container, iova, int128_get64(llsize), ret); | |
1194 | } | |
1195 | iova += int128_get64(llsize); | |
1196 | } | |
9e7b0442 | 1197 | ret = vfio_dma_unmap(container, iova, int128_get64(llsize), NULL); |
567b5b30 AK |
1198 | if (ret) { |
1199 | error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", " | |
1200 | "0x%"HWADDR_PRIx") = %d (%m)", | |
1201 | container, iova, int128_get64(llsize), ret); | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | memory_region_unref(section->mr); | |
1206 | ||
2e4109de AK |
1207 | if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) { |
1208 | vfio_spapr_remove_window(container, | |
1209 | section->offset_within_address_space); | |
1210 | if (vfio_host_win_del(container, | |
1211 | section->offset_within_address_space, | |
1212 | section->offset_within_address_space + | |
1213 | int128_get64(section->size) - 1) < 0) { | |
1214 | hw_error("%s: Cannot delete missing window at %"HWADDR_PRIx, | |
1215 | __func__, section->offset_within_address_space); | |
1216 | } | |
1217 | } | |
e2c7d025 EA |
1218 | } |
1219 | ||
758b96b6 KZ |
1220 | static void vfio_set_dirty_page_tracking(VFIOContainer *container, bool start) |
1221 | { | |
1222 | int ret; | |
1223 | struct vfio_iommu_type1_dirty_bitmap dirty = { | |
1224 | .argsz = sizeof(dirty), | |
1225 | }; | |
1226 | ||
1227 | if (start) { | |
1228 | dirty.flags = VFIO_IOMMU_DIRTY_PAGES_FLAG_START; | |
1229 | } else { | |
1230 | dirty.flags = VFIO_IOMMU_DIRTY_PAGES_FLAG_STOP; | |
1231 | } | |
1232 | ||
1233 | ret = ioctl(container->fd, VFIO_IOMMU_DIRTY_PAGES, &dirty); | |
1234 | if (ret) { | |
1235 | error_report("Failed to set dirty tracking flag 0x%x errno: %d", | |
1236 | dirty.flags, errno); | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | static void vfio_listener_log_global_start(MemoryListener *listener) | |
1241 | { | |
1242 | VFIOContainer *container = container_of(listener, VFIOContainer, listener); | |
1243 | ||
1244 | vfio_set_dirty_page_tracking(container, true); | |
1245 | } | |
1246 | ||
1247 | static void vfio_listener_log_global_stop(MemoryListener *listener) | |
1248 | { | |
1249 | VFIOContainer *container = container_of(listener, VFIOContainer, listener); | |
1250 | ||
1251 | vfio_set_dirty_page_tracking(container, false); | |
1252 | } | |
1253 | ||
b6dd6504 KW |
1254 | static int vfio_get_dirty_bitmap(VFIOContainer *container, uint64_t iova, |
1255 | uint64_t size, ram_addr_t ram_addr) | |
1256 | { | |
1257 | struct vfio_iommu_type1_dirty_bitmap *dbitmap; | |
1258 | struct vfio_iommu_type1_dirty_bitmap_get *range; | |
1259 | uint64_t pages; | |
1260 | int ret; | |
1261 | ||
1262 | dbitmap = g_malloc0(sizeof(*dbitmap) + sizeof(*range)); | |
1263 | ||
1264 | dbitmap->argsz = sizeof(*dbitmap) + sizeof(*range); | |
1265 | dbitmap->flags = VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP; | |
1266 | range = (struct vfio_iommu_type1_dirty_bitmap_get *)&dbitmap->data; | |
1267 | range->iova = iova; | |
1268 | range->size = size; | |
1269 | ||
1270 | /* | |
1eb7f642 KJ |
1271 | * cpu_physical_memory_set_dirty_lebitmap() supports pages in bitmap of |
1272 | * qemu_real_host_page_size to mark those dirty. Hence set bitmap's pgsize | |
1273 | * to qemu_real_host_page_size. | |
b6dd6504 | 1274 | */ |
8e3b0cbb | 1275 | range->bitmap.pgsize = qemu_real_host_page_size(); |
b6dd6504 | 1276 | |
8e3b0cbb | 1277 | pages = REAL_HOST_PAGE_ALIGN(range->size) / qemu_real_host_page_size(); |
b6dd6504 KW |
1278 | range->bitmap.size = ROUND_UP(pages, sizeof(__u64) * BITS_PER_BYTE) / |
1279 | BITS_PER_BYTE; | |
1280 | range->bitmap.data = g_try_malloc0(range->bitmap.size); | |
1281 | if (!range->bitmap.data) { | |
1282 | ret = -ENOMEM; | |
1283 | goto err_out; | |
1284 | } | |
1285 | ||
1286 | ret = ioctl(container->fd, VFIO_IOMMU_DIRTY_PAGES, dbitmap); | |
1287 | if (ret) { | |
1288 | error_report("Failed to get dirty bitmap for iova: 0x%"PRIx64 | |
1289 | " size: 0x%"PRIx64" err: %d", (uint64_t)range->iova, | |
1290 | (uint64_t)range->size, errno); | |
1291 | goto err_out; | |
1292 | } | |
1293 | ||
1294 | cpu_physical_memory_set_dirty_lebitmap((unsigned long *)range->bitmap.data, | |
1295 | ram_addr, pages); | |
1296 | ||
1297 | trace_vfio_get_dirty_bitmap(container->fd, range->iova, range->size, | |
1298 | range->bitmap.size, ram_addr); | |
1299 | err_out: | |
1300 | g_free(range->bitmap.data); | |
1301 | g_free(dbitmap); | |
1302 | ||
1303 | return ret; | |
1304 | } | |
1305 | ||
9a04fe09 KW |
1306 | typedef struct { |
1307 | IOMMUNotifier n; | |
1308 | VFIOGuestIOMMU *giommu; | |
1309 | } vfio_giommu_dirty_notifier; | |
1310 | ||
1311 | static void vfio_iommu_map_dirty_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb) | |
1312 | { | |
1313 | vfio_giommu_dirty_notifier *gdn = container_of(n, | |
1314 | vfio_giommu_dirty_notifier, n); | |
1315 | VFIOGuestIOMMU *giommu = gdn->giommu; | |
1316 | VFIOContainer *container = giommu->container; | |
1317 | hwaddr iova = iotlb->iova + giommu->iommu_offset; | |
1318 | ram_addr_t translated_addr; | |
1319 | ||
1320 | trace_vfio_iommu_map_dirty_notify(iova, iova + iotlb->addr_mask); | |
1321 | ||
1322 | if (iotlb->target_as != &address_space_memory) { | |
1323 | error_report("Wrong target AS \"%s\", only system memory is allowed", | |
1324 | iotlb->target_as->name ? iotlb->target_as->name : "none"); | |
1325 | return; | |
1326 | } | |
1327 | ||
1328 | rcu_read_lock(); | |
1329 | if (vfio_get_xlat_addr(iotlb, NULL, &translated_addr, NULL)) { | |
1330 | int ret; | |
1331 | ||
1332 | ret = vfio_get_dirty_bitmap(container, iova, iotlb->addr_mask + 1, | |
1333 | translated_addr); | |
1334 | if (ret) { | |
1335 | error_report("vfio_iommu_map_dirty_notify(%p, 0x%"HWADDR_PRIx", " | |
1336 | "0x%"HWADDR_PRIx") = %d (%m)", | |
1337 | container, iova, | |
1338 | iotlb->addr_mask + 1, ret); | |
1339 | } | |
1340 | } | |
1341 | rcu_read_unlock(); | |
1342 | } | |
1343 | ||
5e3b981c DH |
1344 | static int vfio_ram_discard_get_dirty_bitmap(MemoryRegionSection *section, |
1345 | void *opaque) | |
1346 | { | |
1347 | const hwaddr size = int128_get64(section->size); | |
1348 | const hwaddr iova = section->offset_within_address_space; | |
1349 | const ram_addr_t ram_addr = memory_region_get_ram_addr(section->mr) + | |
1350 | section->offset_within_region; | |
1351 | VFIORamDiscardListener *vrdl = opaque; | |
1352 | ||
1353 | /* | |
1354 | * Sync the whole mapped region (spanning multiple individual mappings) | |
1355 | * in one go. | |
1356 | */ | |
1357 | return vfio_get_dirty_bitmap(vrdl->container, iova, size, ram_addr); | |
1358 | } | |
1359 | ||
1360 | static int vfio_sync_ram_discard_listener_dirty_bitmap(VFIOContainer *container, | |
1361 | MemoryRegionSection *section) | |
1362 | { | |
1363 | RamDiscardManager *rdm = memory_region_get_ram_discard_manager(section->mr); | |
1364 | VFIORamDiscardListener *vrdl = NULL; | |
1365 | ||
1366 | QLIST_FOREACH(vrdl, &container->vrdl_list, next) { | |
1367 | if (vrdl->mr == section->mr && | |
1368 | vrdl->offset_within_address_space == | |
1369 | section->offset_within_address_space) { | |
1370 | break; | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | if (!vrdl) { | |
1375 | hw_error("vfio: Trying to sync missing RAM discard listener"); | |
1376 | } | |
1377 | ||
1378 | /* | |
1379 | * We only want/can synchronize the bitmap for actually mapped parts - | |
1380 | * which correspond to populated parts. Replay all populated parts. | |
1381 | */ | |
1382 | return ram_discard_manager_replay_populated(rdm, section, | |
1383 | vfio_ram_discard_get_dirty_bitmap, | |
1384 | &vrdl); | |
1385 | } | |
1386 | ||
b6dd6504 KW |
1387 | static int vfio_sync_dirty_bitmap(VFIOContainer *container, |
1388 | MemoryRegionSection *section) | |
1389 | { | |
1390 | ram_addr_t ram_addr; | |
1391 | ||
9a04fe09 KW |
1392 | if (memory_region_is_iommu(section->mr)) { |
1393 | VFIOGuestIOMMU *giommu; | |
1394 | ||
1395 | QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) { | |
1396 | if (MEMORY_REGION(giommu->iommu) == section->mr && | |
1397 | giommu->n.start == section->offset_within_region) { | |
1398 | Int128 llend; | |
1399 | vfio_giommu_dirty_notifier gdn = { .giommu = giommu }; | |
1400 | int idx = memory_region_iommu_attrs_to_index(giommu->iommu, | |
1401 | MEMTXATTRS_UNSPECIFIED); | |
1402 | ||
1403 | llend = int128_add(int128_make64(section->offset_within_region), | |
1404 | section->size); | |
1405 | llend = int128_sub(llend, int128_one()); | |
1406 | ||
1407 | iommu_notifier_init(&gdn.n, | |
1408 | vfio_iommu_map_dirty_notify, | |
1409 | IOMMU_NOTIFIER_MAP, | |
1410 | section->offset_within_region, | |
1411 | int128_get64(llend), | |
1412 | idx); | |
1413 | memory_region_iommu_replay(giommu->iommu, &gdn.n); | |
1414 | break; | |
1415 | } | |
1416 | } | |
1417 | return 0; | |
5e3b981c DH |
1418 | } else if (memory_region_has_ram_discard_manager(section->mr)) { |
1419 | return vfio_sync_ram_discard_listener_dirty_bitmap(container, section); | |
9a04fe09 KW |
1420 | } |
1421 | ||
b6dd6504 KW |
1422 | ram_addr = memory_region_get_ram_addr(section->mr) + |
1423 | section->offset_within_region; | |
1424 | ||
1425 | return vfio_get_dirty_bitmap(container, | |
1eb7f642 KJ |
1426 | REAL_HOST_PAGE_ALIGN(section->offset_within_address_space), |
1427 | int128_get64(section->size), ram_addr); | |
b6dd6504 KW |
1428 | } |
1429 | ||
4292d501 | 1430 | static void vfio_listener_log_sync(MemoryListener *listener, |
b6dd6504 KW |
1431 | MemoryRegionSection *section) |
1432 | { | |
1433 | VFIOContainer *container = container_of(listener, VFIOContainer, listener); | |
1434 | ||
1435 | if (vfio_listener_skipped_section(section) || | |
1436 | !container->dirty_pages_supported) { | |
1437 | return; | |
1438 | } | |
1439 | ||
758b96b6 | 1440 | if (vfio_devices_all_dirty_tracking(container)) { |
b6dd6504 KW |
1441 | vfio_sync_dirty_bitmap(container, section); |
1442 | } | |
1443 | } | |
1444 | ||
51b833f4 | 1445 | static const MemoryListener vfio_memory_listener = { |
142518bd | 1446 | .name = "vfio", |
e2c7d025 EA |
1447 | .region_add = vfio_listener_region_add, |
1448 | .region_del = vfio_listener_region_del, | |
758b96b6 KZ |
1449 | .log_global_start = vfio_listener_log_global_start, |
1450 | .log_global_stop = vfio_listener_log_global_stop, | |
4292d501 | 1451 | .log_sync = vfio_listener_log_sync, |
e2c7d025 EA |
1452 | }; |
1453 | ||
51b833f4 | 1454 | static void vfio_listener_release(VFIOContainer *container) |
e2c7d025 | 1455 | { |
ee0bf0e5 | 1456 | memory_listener_unregister(&container->listener); |
318f67ce AK |
1457 | if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) { |
1458 | memory_listener_unregister(&container->prereg_listener); | |
1459 | } | |
e2c7d025 EA |
1460 | } |
1461 | ||
3ab7a0b4 MR |
1462 | static struct vfio_info_cap_header * |
1463 | vfio_get_cap(void *ptr, uint32_t cap_offset, uint16_t id) | |
b53b0f69 AW |
1464 | { |
1465 | struct vfio_info_cap_header *hdr; | |
b53b0f69 | 1466 | |
3ab7a0b4 | 1467 | for (hdr = ptr + cap_offset; hdr != ptr; hdr = ptr + hdr->next) { |
b53b0f69 AW |
1468 | if (hdr->id == id) { |
1469 | return hdr; | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | return NULL; | |
1474 | } | |
1475 | ||
3ab7a0b4 MR |
1476 | struct vfio_info_cap_header * |
1477 | vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id) | |
1478 | { | |
1479 | if (!(info->flags & VFIO_REGION_INFO_FLAG_CAPS)) { | |
1480 | return NULL; | |
1481 | } | |
1482 | ||
1483 | return vfio_get_cap((void *)info, info->cap_offset, id); | |
1484 | } | |
1485 | ||
7486a628 MR |
1486 | static struct vfio_info_cap_header * |
1487 | vfio_get_iommu_type1_info_cap(struct vfio_iommu_type1_info *info, uint16_t id) | |
1488 | { | |
1489 | if (!(info->flags & VFIO_IOMMU_INFO_CAPS)) { | |
1490 | return NULL; | |
1491 | } | |
1492 | ||
1493 | return vfio_get_cap((void *)info, info->cap_offset, id); | |
1494 | } | |
1495 | ||
92fe289a MR |
1496 | struct vfio_info_cap_header * |
1497 | vfio_get_device_info_cap(struct vfio_device_info *info, uint16_t id) | |
1498 | { | |
1499 | if (!(info->flags & VFIO_DEVICE_FLAGS_CAPS)) { | |
1500 | return NULL; | |
1501 | } | |
1502 | ||
1503 | return vfio_get_cap((void *)info, info->cap_offset, id); | |
1504 | } | |
1505 | ||
7486a628 MR |
1506 | bool vfio_get_info_dma_avail(struct vfio_iommu_type1_info *info, |
1507 | unsigned int *avail) | |
1508 | { | |
1509 | struct vfio_info_cap_header *hdr; | |
1510 | struct vfio_iommu_type1_info_dma_avail *cap; | |
1511 | ||
1512 | /* If the capability cannot be found, assume no DMA limiting */ | |
1513 | hdr = vfio_get_iommu_type1_info_cap(info, | |
1514 | VFIO_IOMMU_TYPE1_INFO_DMA_AVAIL); | |
1515 | if (hdr == NULL) { | |
1516 | return false; | |
1517 | } | |
1518 | ||
1519 | if (avail != NULL) { | |
1520 | cap = (void *) hdr; | |
1521 | *avail = cap->avail; | |
1522 | } | |
1523 | ||
1524 | return true; | |
1525 | } | |
1526 | ||
24acf72b AW |
1527 | static int vfio_setup_region_sparse_mmaps(VFIORegion *region, |
1528 | struct vfio_region_info *info) | |
b53b0f69 AW |
1529 | { |
1530 | struct vfio_info_cap_header *hdr; | |
1531 | struct vfio_region_info_cap_sparse_mmap *sparse; | |
24acf72b | 1532 | int i, j; |
b53b0f69 AW |
1533 | |
1534 | hdr = vfio_get_region_info_cap(info, VFIO_REGION_INFO_CAP_SPARSE_MMAP); | |
1535 | if (!hdr) { | |
24acf72b | 1536 | return -ENODEV; |
b53b0f69 AW |
1537 | } |
1538 | ||
1539 | sparse = container_of(hdr, struct vfio_region_info_cap_sparse_mmap, header); | |
1540 | ||
1541 | trace_vfio_region_sparse_mmap_header(region->vbasedev->name, | |
1542 | region->nr, sparse->nr_areas); | |
1543 | ||
24acf72b AW |
1544 | region->mmaps = g_new0(VFIOMmap, sparse->nr_areas); |
1545 | ||
1546 | for (i = 0, j = 0; i < sparse->nr_areas; i++) { | |
1547 | trace_vfio_region_sparse_mmap_entry(i, sparse->areas[i].offset, | |
1548 | sparse->areas[i].offset + | |
1549 | sparse->areas[i].size); | |
b53b0f69 | 1550 | |
24acf72b AW |
1551 | if (sparse->areas[i].size) { |
1552 | region->mmaps[j].offset = sparse->areas[i].offset; | |
1553 | region->mmaps[j].size = sparse->areas[i].size; | |
1554 | j++; | |
1555 | } | |
b53b0f69 | 1556 | } |
24acf72b AW |
1557 | |
1558 | region->nr_mmaps = j; | |
1559 | region->mmaps = g_realloc(region->mmaps, j * sizeof(VFIOMmap)); | |
1560 | ||
1561 | return 0; | |
b53b0f69 AW |
1562 | } |
1563 | ||
db0da029 AW |
1564 | int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region, |
1565 | int index, const char *name) | |
e2c7d025 | 1566 | { |
db0da029 AW |
1567 | struct vfio_region_info *info; |
1568 | int ret; | |
1569 | ||
1570 | ret = vfio_get_region_info(vbasedev, index, &info); | |
1571 | if (ret) { | |
1572 | return ret; | |
1573 | } | |
1574 | ||
1575 | region->vbasedev = vbasedev; | |
1576 | region->flags = info->flags; | |
1577 | region->size = info->size; | |
1578 | region->fd_offset = info->offset; | |
1579 | region->nr = index; | |
1580 | ||
1581 | if (region->size) { | |
1582 | region->mem = g_new0(MemoryRegion, 1); | |
1583 | memory_region_init_io(region->mem, obj, &vfio_region_ops, | |
1584 | region, name, region->size); | |
e2c7d025 | 1585 | |
db0da029 | 1586 | if (!vbasedev->no_mmap && |
95251725 | 1587 | region->flags & VFIO_REGION_INFO_FLAG_MMAP) { |
e2c7d025 | 1588 | |
24acf72b | 1589 | ret = vfio_setup_region_sparse_mmaps(region, info); |
db0da029 | 1590 | |
24acf72b | 1591 | if (ret) { |
b53b0f69 AW |
1592 | region->nr_mmaps = 1; |
1593 | region->mmaps = g_new0(VFIOMmap, region->nr_mmaps); | |
1594 | region->mmaps[0].offset = 0; | |
1595 | region->mmaps[0].size = region->size; | |
1596 | } | |
e2c7d025 | 1597 | } |
db0da029 AW |
1598 | } |
1599 | ||
1600 | g_free(info); | |
1601 | ||
1602 | trace_vfio_region_setup(vbasedev->name, index, name, | |
1603 | region->flags, region->fd_offset, region->size); | |
1604 | return 0; | |
1605 | } | |
e2c7d025 | 1606 | |
0f7a903b KW |
1607 | static void vfio_subregion_unmap(VFIORegion *region, int index) |
1608 | { | |
1609 | trace_vfio_region_unmap(memory_region_name(®ion->mmaps[index].mem), | |
1610 | region->mmaps[index].offset, | |
1611 | region->mmaps[index].offset + | |
1612 | region->mmaps[index].size - 1); | |
1613 | memory_region_del_subregion(region->mem, ®ion->mmaps[index].mem); | |
1614 | munmap(region->mmaps[index].mmap, region->mmaps[index].size); | |
1615 | object_unparent(OBJECT(®ion->mmaps[index].mem)); | |
1616 | region->mmaps[index].mmap = NULL; | |
1617 | } | |
1618 | ||
db0da029 AW |
1619 | int vfio_region_mmap(VFIORegion *region) |
1620 | { | |
1621 | int i, prot = 0; | |
1622 | char *name; | |
1623 | ||
1624 | if (!region->mem) { | |
1625 | return 0; | |
1626 | } | |
1627 | ||
1628 | prot |= region->flags & VFIO_REGION_INFO_FLAG_READ ? PROT_READ : 0; | |
1629 | prot |= region->flags & VFIO_REGION_INFO_FLAG_WRITE ? PROT_WRITE : 0; | |
1630 | ||
1631 | for (i = 0; i < region->nr_mmaps; i++) { | |
1632 | region->mmaps[i].mmap = mmap(NULL, region->mmaps[i].size, prot, | |
1633 | MAP_SHARED, region->vbasedev->fd, | |
1634 | region->fd_offset + | |
1635 | region->mmaps[i].offset); | |
1636 | if (region->mmaps[i].mmap == MAP_FAILED) { | |
1637 | int ret = -errno; | |
1638 | ||
1639 | trace_vfio_region_mmap_fault(memory_region_name(region->mem), i, | |
1640 | region->fd_offset + | |
1641 | region->mmaps[i].offset, | |
1642 | region->fd_offset + | |
1643 | region->mmaps[i].offset + | |
1644 | region->mmaps[i].size - 1, ret); | |
1645 | ||
1646 | region->mmaps[i].mmap = NULL; | |
1647 | ||
1648 | for (i--; i >= 0; i--) { | |
0f7a903b | 1649 | vfio_subregion_unmap(region, i); |
db0da029 AW |
1650 | } |
1651 | ||
1652 | return ret; | |
e2c7d025 EA |
1653 | } |
1654 | ||
db0da029 AW |
1655 | name = g_strdup_printf("%s mmaps[%d]", |
1656 | memory_region_name(region->mem), i); | |
21e00fa5 AW |
1657 | memory_region_init_ram_device_ptr(®ion->mmaps[i].mem, |
1658 | memory_region_owner(region->mem), | |
1659 | name, region->mmaps[i].size, | |
1660 | region->mmaps[i].mmap); | |
db0da029 | 1661 | g_free(name); |
db0da029 AW |
1662 | memory_region_add_subregion(region->mem, region->mmaps[i].offset, |
1663 | ®ion->mmaps[i].mem); | |
1664 | ||
1665 | trace_vfio_region_mmap(memory_region_name(®ion->mmaps[i].mem), | |
1666 | region->mmaps[i].offset, | |
1667 | region->mmaps[i].offset + | |
1668 | region->mmaps[i].size - 1); | |
1669 | } | |
1670 | ||
1671 | return 0; | |
1672 | } | |
1673 | ||
0f7a903b KW |
1674 | void vfio_region_unmap(VFIORegion *region) |
1675 | { | |
1676 | int i; | |
1677 | ||
1678 | if (!region->mem) { | |
1679 | return; | |
1680 | } | |
1681 | ||
1682 | for (i = 0; i < region->nr_mmaps; i++) { | |
1683 | if (region->mmaps[i].mmap) { | |
1684 | vfio_subregion_unmap(region, i); | |
1685 | } | |
1686 | } | |
1687 | } | |
1688 | ||
db0da029 AW |
1689 | void vfio_region_exit(VFIORegion *region) |
1690 | { | |
1691 | int i; | |
1692 | ||
1693 | if (!region->mem) { | |
1694 | return; | |
1695 | } | |
1696 | ||
1697 | for (i = 0; i < region->nr_mmaps; i++) { | |
1698 | if (region->mmaps[i].mmap) { | |
1699 | memory_region_del_subregion(region->mem, ®ion->mmaps[i].mem); | |
e2c7d025 | 1700 | } |
db0da029 | 1701 | } |
e2c7d025 | 1702 | |
db0da029 AW |
1703 | trace_vfio_region_exit(region->vbasedev->name, region->nr); |
1704 | } | |
1705 | ||
1706 | void vfio_region_finalize(VFIORegion *region) | |
1707 | { | |
1708 | int i; | |
1709 | ||
1710 | if (!region->mem) { | |
1711 | return; | |
e2c7d025 EA |
1712 | } |
1713 | ||
db0da029 AW |
1714 | for (i = 0; i < region->nr_mmaps; i++) { |
1715 | if (region->mmaps[i].mmap) { | |
1716 | munmap(region->mmaps[i].mmap, region->mmaps[i].size); | |
1717 | object_unparent(OBJECT(®ion->mmaps[i].mem)); | |
1718 | } | |
1719 | } | |
1720 | ||
1721 | object_unparent(OBJECT(region->mem)); | |
1722 | ||
1723 | g_free(region->mem); | |
1724 | g_free(region->mmaps); | |
1725 | ||
1726 | trace_vfio_region_finalize(region->vbasedev->name, region->nr); | |
92f86bff GH |
1727 | |
1728 | region->mem = NULL; | |
1729 | region->mmaps = NULL; | |
1730 | region->nr_mmaps = 0; | |
1731 | region->size = 0; | |
1732 | region->flags = 0; | |
1733 | region->nr = 0; | |
db0da029 AW |
1734 | } |
1735 | ||
1736 | void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled) | |
1737 | { | |
1738 | int i; | |
1739 | ||
1740 | if (!region->mem) { | |
1741 | return; | |
1742 | } | |
1743 | ||
1744 | for (i = 0; i < region->nr_mmaps; i++) { | |
1745 | if (region->mmaps[i].mmap) { | |
1746 | memory_region_set_enabled(®ion->mmaps[i].mem, enabled); | |
1747 | } | |
1748 | } | |
e2c7d025 | 1749 | |
db0da029 AW |
1750 | trace_vfio_region_mmaps_set_enabled(memory_region_name(region->mem), |
1751 | enabled); | |
e2c7d025 EA |
1752 | } |
1753 | ||
1754 | void vfio_reset_handler(void *opaque) | |
1755 | { | |
1756 | VFIOGroup *group; | |
1757 | VFIODevice *vbasedev; | |
1758 | ||
1759 | QLIST_FOREACH(group, &vfio_group_list, next) { | |
1760 | QLIST_FOREACH(vbasedev, &group->device_list, next) { | |
7da624e2 AW |
1761 | if (vbasedev->dev->realized) { |
1762 | vbasedev->ops->vfio_compute_needs_reset(vbasedev); | |
1763 | } | |
e2c7d025 EA |
1764 | } |
1765 | } | |
1766 | ||
1767 | QLIST_FOREACH(group, &vfio_group_list, next) { | |
1768 | QLIST_FOREACH(vbasedev, &group->device_list, next) { | |
7da624e2 | 1769 | if (vbasedev->dev->realized && vbasedev->needs_reset) { |
e2c7d025 EA |
1770 | vbasedev->ops->vfio_hot_reset_multi(vbasedev); |
1771 | } | |
1772 | } | |
1773 | } | |
1774 | } | |
1775 | ||
1776 | static void vfio_kvm_device_add_group(VFIOGroup *group) | |
1777 | { | |
1778 | #ifdef CONFIG_KVM | |
1779 | struct kvm_device_attr attr = { | |
1780 | .group = KVM_DEV_VFIO_GROUP, | |
1781 | .attr = KVM_DEV_VFIO_GROUP_ADD, | |
1782 | .addr = (uint64_t)(unsigned long)&group->fd, | |
1783 | }; | |
1784 | ||
1785 | if (!kvm_enabled()) { | |
1786 | return; | |
1787 | } | |
1788 | ||
1789 | if (vfio_kvm_device_fd < 0) { | |
1790 | struct kvm_create_device cd = { | |
1791 | .type = KVM_DEV_TYPE_VFIO, | |
1792 | }; | |
1793 | ||
1794 | if (kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd)) { | |
78e5b17f | 1795 | error_report("Failed to create KVM VFIO device: %m"); |
e2c7d025 EA |
1796 | return; |
1797 | } | |
1798 | ||
1799 | vfio_kvm_device_fd = cd.fd; | |
1800 | } | |
1801 | ||
1802 | if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) { | |
1803 | error_report("Failed to add group %d to KVM VFIO device: %m", | |
1804 | group->groupid); | |
1805 | } | |
1806 | #endif | |
1807 | } | |
1808 | ||
1809 | static void vfio_kvm_device_del_group(VFIOGroup *group) | |
1810 | { | |
1811 | #ifdef CONFIG_KVM | |
1812 | struct kvm_device_attr attr = { | |
1813 | .group = KVM_DEV_VFIO_GROUP, | |
1814 | .attr = KVM_DEV_VFIO_GROUP_DEL, | |
1815 | .addr = (uint64_t)(unsigned long)&group->fd, | |
1816 | }; | |
1817 | ||
1818 | if (vfio_kvm_device_fd < 0) { | |
1819 | return; | |
1820 | } | |
1821 | ||
1822 | if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) { | |
1823 | error_report("Failed to remove group %d from KVM VFIO device: %m", | |
1824 | group->groupid); | |
1825 | } | |
1826 | #endif | |
1827 | } | |
1828 | ||
1829 | static VFIOAddressSpace *vfio_get_address_space(AddressSpace *as) | |
1830 | { | |
1831 | VFIOAddressSpace *space; | |
1832 | ||
1833 | QLIST_FOREACH(space, &vfio_address_spaces, list) { | |
1834 | if (space->as == as) { | |
1835 | return space; | |
1836 | } | |
1837 | } | |
1838 | ||
1839 | /* No suitable VFIOAddressSpace, create a new one */ | |
1840 | space = g_malloc0(sizeof(*space)); | |
1841 | space->as = as; | |
1842 | QLIST_INIT(&space->containers); | |
1843 | ||
1844 | QLIST_INSERT_HEAD(&vfio_address_spaces, space, list); | |
1845 | ||
1846 | return space; | |
1847 | } | |
1848 | ||
1849 | static void vfio_put_address_space(VFIOAddressSpace *space) | |
1850 | { | |
1851 | if (QLIST_EMPTY(&space->containers)) { | |
1852 | QLIST_REMOVE(space, list); | |
1853 | g_free(space); | |
1854 | } | |
1855 | } | |
1856 | ||
2b6326c0 EA |
1857 | /* |
1858 | * vfio_get_iommu_type - selects the richest iommu_type (v2 first) | |
1859 | */ | |
1860 | static int vfio_get_iommu_type(VFIOContainer *container, | |
1861 | Error **errp) | |
1862 | { | |
1863 | int iommu_types[] = { VFIO_TYPE1v2_IOMMU, VFIO_TYPE1_IOMMU, | |
1864 | VFIO_SPAPR_TCE_v2_IOMMU, VFIO_SPAPR_TCE_IOMMU }; | |
1865 | int i; | |
1866 | ||
1867 | for (i = 0; i < ARRAY_SIZE(iommu_types); i++) { | |
1868 | if (ioctl(container->fd, VFIO_CHECK_EXTENSION, iommu_types[i])) { | |
1869 | return iommu_types[i]; | |
1870 | } | |
1871 | } | |
1872 | error_setg(errp, "No available IOMMU models"); | |
1873 | return -EINVAL; | |
1874 | } | |
1875 | ||
1876 | static int vfio_init_container(VFIOContainer *container, int group_fd, | |
1877 | Error **errp) | |
1878 | { | |
1879 | int iommu_type, ret; | |
1880 | ||
1881 | iommu_type = vfio_get_iommu_type(container, errp); | |
1882 | if (iommu_type < 0) { | |
1883 | return iommu_type; | |
1884 | } | |
1885 | ||
1886 | ret = ioctl(group_fd, VFIO_GROUP_SET_CONTAINER, &container->fd); | |
1887 | if (ret) { | |
1888 | error_setg_errno(errp, errno, "Failed to set group container"); | |
1889 | return -errno; | |
1890 | } | |
1891 | ||
1892 | while (ioctl(container->fd, VFIO_SET_IOMMU, iommu_type)) { | |
1893 | if (iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) { | |
1894 | /* | |
1895 | * On sPAPR, despite the IOMMU subdriver always advertises v1 and | |
1896 | * v2, the running platform may not support v2 and there is no | |
1897 | * way to guess it until an IOMMU group gets added to the container. | |
1898 | * So in case it fails with v2, try v1 as a fallback. | |
1899 | */ | |
1900 | iommu_type = VFIO_SPAPR_TCE_IOMMU; | |
1901 | continue; | |
1902 | } | |
1903 | error_setg_errno(errp, errno, "Failed to set iommu for container"); | |
1904 | return -errno; | |
1905 | } | |
1906 | ||
1907 | container->iommu_type = iommu_type; | |
1908 | return 0; | |
1909 | } | |
1910 | ||
87ea529c KW |
1911 | static int vfio_get_iommu_info(VFIOContainer *container, |
1912 | struct vfio_iommu_type1_info **info) | |
1913 | { | |
1914 | ||
1915 | size_t argsz = sizeof(struct vfio_iommu_type1_info); | |
1916 | ||
1917 | *info = g_new0(struct vfio_iommu_type1_info, 1); | |
1918 | again: | |
1919 | (*info)->argsz = argsz; | |
1920 | ||
1921 | if (ioctl(container->fd, VFIO_IOMMU_GET_INFO, *info)) { | |
1922 | g_free(*info); | |
1923 | *info = NULL; | |
1924 | return -errno; | |
1925 | } | |
1926 | ||
1927 | if (((*info)->argsz > argsz)) { | |
1928 | argsz = (*info)->argsz; | |
1929 | *info = g_realloc(*info, argsz); | |
1930 | goto again; | |
1931 | } | |
1932 | ||
1933 | return 0; | |
1934 | } | |
1935 | ||
1936 | static struct vfio_info_cap_header * | |
1937 | vfio_get_iommu_info_cap(struct vfio_iommu_type1_info *info, uint16_t id) | |
1938 | { | |
1939 | struct vfio_info_cap_header *hdr; | |
1940 | void *ptr = info; | |
1941 | ||
1942 | if (!(info->flags & VFIO_IOMMU_INFO_CAPS)) { | |
1943 | return NULL; | |
1944 | } | |
1945 | ||
1946 | for (hdr = ptr + info->cap_offset; hdr != ptr; hdr = ptr + hdr->next) { | |
1947 | if (hdr->id == id) { | |
1948 | return hdr; | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | return NULL; | |
1953 | } | |
1954 | ||
1955 | static void vfio_get_iommu_info_migration(VFIOContainer *container, | |
1956 | struct vfio_iommu_type1_info *info) | |
1957 | { | |
1958 | struct vfio_info_cap_header *hdr; | |
1959 | struct vfio_iommu_type1_info_cap_migration *cap_mig; | |
1960 | ||
1961 | hdr = vfio_get_iommu_info_cap(info, VFIO_IOMMU_TYPE1_INFO_CAP_MIGRATION); | |
1962 | if (!hdr) { | |
1963 | return; | |
1964 | } | |
1965 | ||
1966 | cap_mig = container_of(hdr, struct vfio_iommu_type1_info_cap_migration, | |
1967 | header); | |
1968 | ||
1969 | /* | |
1eb7f642 KJ |
1970 | * cpu_physical_memory_set_dirty_lebitmap() supports pages in bitmap of |
1971 | * qemu_real_host_page_size to mark those dirty. | |
87ea529c | 1972 | */ |
8e3b0cbb | 1973 | if (cap_mig->pgsize_bitmap & qemu_real_host_page_size()) { |
87ea529c KW |
1974 | container->dirty_pages_supported = true; |
1975 | container->max_dirty_bitmap_size = cap_mig->max_dirty_bitmap_size; | |
1976 | container->dirty_pgsizes = cap_mig->pgsize_bitmap; | |
1977 | } | |
1978 | } | |
1979 | ||
01905f58 EA |
1980 | static int vfio_connect_container(VFIOGroup *group, AddressSpace *as, |
1981 | Error **errp) | |
e2c7d025 EA |
1982 | { |
1983 | VFIOContainer *container; | |
1984 | int ret, fd; | |
1985 | VFIOAddressSpace *space; | |
1986 | ||
1987 | space = vfio_get_address_space(as); | |
1988 | ||
c65ee433 | 1989 | /* |
aff92b82 | 1990 | * VFIO is currently incompatible with discarding of RAM insofar as the |
c65ee433 AW |
1991 | * madvise to purge (zap) the page from QEMU's address space does not |
1992 | * interact with the memory API and therefore leaves stale virtual to | |
1993 | * physical mappings in the IOMMU if the page was previously pinned. We | |
aff92b82 | 1994 | * therefore set discarding broken for each group added to a container, |
c65ee433 AW |
1995 | * whether the container is used individually or shared. This provides |
1996 | * us with options to allow devices within a group to opt-in and allow | |
aff92b82 | 1997 | * discarding, so long as it is done consistently for a group (for instance |
c65ee433 AW |
1998 | * if the device is an mdev device where it is known that the host vendor |
1999 | * driver will never pin pages outside of the working set of the guest | |
aff92b82 | 2000 | * driver, which would thus not be discarding candidates). |
c65ee433 AW |
2001 | * |
2002 | * The first opportunity to induce pinning occurs here where we attempt to | |
2003 | * attach the group to existing containers within the AddressSpace. If any | |
aff92b82 DH |
2004 | * pages are already zapped from the virtual address space, such as from |
2005 | * previous discards, new pinning will cause valid mappings to be | |
c65ee433 AW |
2006 | * re-established. Likewise, when the overall MemoryListener for a new |
2007 | * container is registered, a replay of mappings within the AddressSpace | |
2008 | * will occur, re-establishing any previously zapped pages as well. | |
2009 | * | |
aff92b82 DH |
2010 | * Especially virtio-balloon is currently only prevented from discarding |
2011 | * new memory, it will not yet set ram_block_discard_set_required() and | |
2012 | * therefore, neither stops us here or deals with the sudden memory | |
2013 | * consumption of inflated memory. | |
53d1b5fc DH |
2014 | * |
2015 | * We do support discarding of memory coordinated via the RamDiscardManager | |
2016 | * with some IOMMU types. vfio_ram_block_discard_disable() handles the | |
2017 | * details once we know which type of IOMMU we are using. | |
c65ee433 | 2018 | */ |
c65ee433 | 2019 | |
e2c7d025 EA |
2020 | QLIST_FOREACH(container, &space->containers, next) { |
2021 | if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) { | |
53d1b5fc DH |
2022 | ret = vfio_ram_block_discard_disable(container, true); |
2023 | if (ret) { | |
2024 | error_setg_errno(errp, -ret, | |
2025 | "Cannot set discarding of RAM broken"); | |
2026 | if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, | |
2027 | &container->fd)) { | |
2028 | error_report("vfio: error disconnecting group %d from" | |
2029 | " container", group->groupid); | |
2030 | } | |
2031 | return ret; | |
2032 | } | |
e2c7d025 EA |
2033 | group->container = container; |
2034 | QLIST_INSERT_HEAD(&container->group_list, group, container_next); | |
2016986a | 2035 | vfio_kvm_device_add_group(group); |
e2c7d025 EA |
2036 | return 0; |
2037 | } | |
2038 | } | |
2039 | ||
448058aa | 2040 | fd = qemu_open_old("/dev/vfio/vfio", O_RDWR); |
e2c7d025 | 2041 | if (fd < 0) { |
01905f58 | 2042 | error_setg_errno(errp, errno, "failed to open /dev/vfio/vfio"); |
e2c7d025 EA |
2043 | ret = -errno; |
2044 | goto put_space_exit; | |
2045 | } | |
2046 | ||
2047 | ret = ioctl(fd, VFIO_GET_API_VERSION); | |
2048 | if (ret != VFIO_API_VERSION) { | |
01905f58 EA |
2049 | error_setg(errp, "supported vfio version: %d, " |
2050 | "reported version: %d", VFIO_API_VERSION, ret); | |
e2c7d025 EA |
2051 | ret = -EINVAL; |
2052 | goto close_fd_exit; | |
2053 | } | |
2054 | ||
2055 | container = g_malloc0(sizeof(*container)); | |
2056 | container->space = space; | |
2057 | container->fd = fd; | |
d7d87836 | 2058 | container->error = NULL; |
87ea529c | 2059 | container->dirty_pages_supported = false; |
3eed155c | 2060 | container->dma_max_mappings = 0; |
f7f9c7b2 LY |
2061 | QLIST_INIT(&container->giommu_list); |
2062 | QLIST_INIT(&container->hostwin_list); | |
5e3b981c | 2063 | QLIST_INIT(&container->vrdl_list); |
2e6e697e | 2064 | |
2b6326c0 EA |
2065 | ret = vfio_init_container(container, group->fd, errp); |
2066 | if (ret) { | |
2067 | goto free_container_exit; | |
2068 | } | |
e2c7d025 | 2069 | |
53d1b5fc DH |
2070 | ret = vfio_ram_block_discard_disable(container, true); |
2071 | if (ret) { | |
2072 | error_setg_errno(errp, -ret, "Cannot set discarding of RAM broken"); | |
2073 | goto free_container_exit; | |
2074 | } | |
2075 | ||
2b6326c0 EA |
2076 | switch (container->iommu_type) { |
2077 | case VFIO_TYPE1v2_IOMMU: | |
2078 | case VFIO_TYPE1_IOMMU: | |
2079 | { | |
87ea529c | 2080 | struct vfio_iommu_type1_info *info; |
3898aad3 DG |
2081 | |
2082 | /* | |
2083 | * FIXME: This assumes that a Type1 IOMMU can map any 64-bit | |
2084 | * IOVA whatsoever. That's not actually true, but the current | |
2085 | * kernel interface doesn't tell us what it can map, and the | |
2086 | * existing Type1 IOMMUs generally support any IOVA we're | |
2087 | * going to actually try in practice. | |
2088 | */ | |
87ea529c KW |
2089 | ret = vfio_get_iommu_info(container, &info); |
2090 | ||
2091 | if (ret || !(info->flags & VFIO_IOMMU_INFO_PGSIZES)) { | |
f4ec5e26 | 2092 | /* Assume 4k IOVA page size */ |
87ea529c KW |
2093 | info->iova_pgsizes = 4096; |
2094 | } | |
2095 | vfio_host_win_add(container, 0, (hwaddr)-1, info->iova_pgsizes); | |
2096 | container->pgsizes = info->iova_pgsizes; | |
2097 | ||
3eed155c DH |
2098 | /* The default in the kernel ("dma_entry_limit") is 65535. */ |
2099 | container->dma_max_mappings = 65535; | |
87ea529c | 2100 | if (!ret) { |
3eed155c | 2101 | vfio_get_info_dma_avail(info, &container->dma_max_mappings); |
87ea529c | 2102 | vfio_get_iommu_info_migration(container, info); |
7a140a57 | 2103 | } |
87ea529c | 2104 | g_free(info); |
2b6326c0 EA |
2105 | break; |
2106 | } | |
2107 | case VFIO_SPAPR_TCE_v2_IOMMU: | |
2108 | case VFIO_SPAPR_TCE_IOMMU: | |
2109 | { | |
3898aad3 | 2110 | struct vfio_iommu_spapr_tce_info info; |
2b6326c0 | 2111 | bool v2 = container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU; |
e2c7d025 EA |
2112 | |
2113 | /* | |
2114 | * The host kernel code implementing VFIO_IOMMU_DISABLE is called | |
2115 | * when container fd is closed so we do not call it explicitly | |
2116 | * in this file. | |
2117 | */ | |
318f67ce AK |
2118 | if (!v2) { |
2119 | ret = ioctl(fd, VFIO_IOMMU_ENABLE); | |
2120 | if (ret) { | |
01905f58 | 2121 | error_setg_errno(errp, errno, "failed to enable container"); |
318f67ce | 2122 | ret = -errno; |
53d1b5fc | 2123 | goto enable_discards_exit; |
318f67ce AK |
2124 | } |
2125 | } else { | |
2126 | container->prereg_listener = vfio_prereg_listener; | |
2127 | ||
2128 | memory_listener_register(&container->prereg_listener, | |
2129 | &address_space_memory); | |
2130 | if (container->error) { | |
2131 | memory_listener_unregister(&container->prereg_listener); | |
d7d87836 EA |
2132 | ret = -1; |
2133 | error_propagate_prepend(errp, container->error, | |
2134 | "RAM memory listener initialization failed: "); | |
53d1b5fc | 2135 | goto enable_discards_exit; |
318f67ce | 2136 | } |
e2c7d025 | 2137 | } |
3898aad3 | 2138 | |
3898aad3 DG |
2139 | info.argsz = sizeof(info); |
2140 | ret = ioctl(fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO, &info); | |
2141 | if (ret) { | |
01905f58 EA |
2142 | error_setg_errno(errp, errno, |
2143 | "VFIO_IOMMU_SPAPR_TCE_GET_INFO failed"); | |
3898aad3 | 2144 | ret = -errno; |
318f67ce AK |
2145 | if (v2) { |
2146 | memory_listener_unregister(&container->prereg_listener); | |
2147 | } | |
53d1b5fc | 2148 | goto enable_discards_exit; |
3898aad3 | 2149 | } |
7a140a57 | 2150 | |
2e4109de | 2151 | if (v2) { |
c26bc185 | 2152 | container->pgsizes = info.ddw.pgsizes; |
2e4109de AK |
2153 | /* |
2154 | * There is a default window in just created container. | |
2155 | * To make region_add/del simpler, we better remove this | |
2156 | * window now and let those iommu_listener callbacks | |
2157 | * create/remove them when needed. | |
2158 | */ | |
2159 | ret = vfio_spapr_remove_window(container, info.dma32_window_start); | |
2160 | if (ret) { | |
01905f58 EA |
2161 | error_setg_errno(errp, -ret, |
2162 | "failed to remove existing window"); | |
53d1b5fc | 2163 | goto enable_discards_exit; |
2e4109de AK |
2164 | } |
2165 | } else { | |
2166 | /* The default table uses 4K pages */ | |
c26bc185 | 2167 | container->pgsizes = 0x1000; |
2e4109de AK |
2168 | vfio_host_win_add(container, info.dma32_window_start, |
2169 | info.dma32_window_start + | |
2170 | info.dma32_window_size - 1, | |
2171 | 0x1000); | |
2172 | } | |
2b6326c0 | 2173 | } |
e2c7d025 EA |
2174 | } |
2175 | ||
8c37faa4 AK |
2176 | vfio_kvm_device_add_group(group); |
2177 | ||
2178 | QLIST_INIT(&container->group_list); | |
2179 | QLIST_INSERT_HEAD(&space->containers, container, next); | |
2180 | ||
2181 | group->container = container; | |
2182 | QLIST_INSERT_HEAD(&container->group_list, group, container_next); | |
2183 | ||
ee0bf0e5 DG |
2184 | container->listener = vfio_memory_listener; |
2185 | ||
2186 | memory_listener_register(&container->listener, container->space->as); | |
2187 | ||
2188 | if (container->error) { | |
d7d87836 EA |
2189 | ret = -1; |
2190 | error_propagate_prepend(errp, container->error, | |
2191 | "memory listener initialization failed: "); | |
ee0bf0e5 DG |
2192 | goto listener_release_exit; |
2193 | } | |
2194 | ||
2195 | container->initialized = true; | |
2196 | ||
e2c7d025 EA |
2197 | return 0; |
2198 | listener_release_exit: | |
8c37faa4 AK |
2199 | QLIST_REMOVE(group, container_next); |
2200 | QLIST_REMOVE(container, next); | |
2201 | vfio_kvm_device_del_group(group); | |
e2c7d025 EA |
2202 | vfio_listener_release(container); |
2203 | ||
53d1b5fc DH |
2204 | enable_discards_exit: |
2205 | vfio_ram_block_discard_disable(container, false); | |
2206 | ||
e2c7d025 EA |
2207 | free_container_exit: |
2208 | g_free(container); | |
2209 | ||
2210 | close_fd_exit: | |
2211 | close(fd); | |
2212 | ||
2213 | put_space_exit: | |
2214 | vfio_put_address_space(space); | |
2215 | ||
2216 | return ret; | |
2217 | } | |
2218 | ||
2219 | static void vfio_disconnect_container(VFIOGroup *group) | |
2220 | { | |
2221 | VFIOContainer *container = group->container; | |
2222 | ||
36968626 PX |
2223 | QLIST_REMOVE(group, container_next); |
2224 | group->container = NULL; | |
2225 | ||
2226 | /* | |
2227 | * Explicitly release the listener first before unset container, | |
2228 | * since unset may destroy the backend container if it's the last | |
2229 | * group. | |
2230 | */ | |
2231 | if (QLIST_EMPTY(&container->group_list)) { | |
2232 | vfio_listener_release(container); | |
2233 | } | |
2234 | ||
e2c7d025 EA |
2235 | if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) { |
2236 | error_report("vfio: error disconnecting group %d from container", | |
2237 | group->groupid); | |
2238 | } | |
2239 | ||
e2c7d025 EA |
2240 | if (QLIST_EMPTY(&container->group_list)) { |
2241 | VFIOAddressSpace *space = container->space; | |
f8d8a944 | 2242 | VFIOGuestIOMMU *giommu, *tmp; |
f3bc3a73 | 2243 | VFIOHostDMAWindow *hostwin, *next; |
e2c7d025 | 2244 | |
e2c7d025 | 2245 | QLIST_REMOVE(container, next); |
f8d8a944 AK |
2246 | |
2247 | QLIST_FOREACH_SAFE(giommu, &container->giommu_list, giommu_next, tmp) { | |
3df9d748 AK |
2248 | memory_region_unregister_iommu_notifier( |
2249 | MEMORY_REGION(giommu->iommu), &giommu->n); | |
f8d8a944 AK |
2250 | QLIST_REMOVE(giommu, giommu_next); |
2251 | g_free(giommu); | |
2252 | } | |
2253 | ||
f3bc3a73 PL |
2254 | QLIST_FOREACH_SAFE(hostwin, &container->hostwin_list, hostwin_next, |
2255 | next) { | |
2256 | QLIST_REMOVE(hostwin, hostwin_next); | |
2257 | g_free(hostwin); | |
2258 | } | |
2259 | ||
e2c7d025 EA |
2260 | trace_vfio_disconnect_container(container->fd); |
2261 | close(container->fd); | |
2262 | g_free(container); | |
2263 | ||
2264 | vfio_put_address_space(space); | |
2265 | } | |
2266 | } | |
2267 | ||
1b808d5b | 2268 | VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp) |
e2c7d025 EA |
2269 | { |
2270 | VFIOGroup *group; | |
2271 | char path[32]; | |
2272 | struct vfio_group_status status = { .argsz = sizeof(status) }; | |
2273 | ||
2274 | QLIST_FOREACH(group, &vfio_group_list, next) { | |
2275 | if (group->groupid == groupid) { | |
2276 | /* Found it. Now is it already in the right context? */ | |
2277 | if (group->container->space->as == as) { | |
2278 | return group; | |
2279 | } else { | |
1b808d5b EA |
2280 | error_setg(errp, "group %d used in multiple address spaces", |
2281 | group->groupid); | |
e2c7d025 EA |
2282 | return NULL; |
2283 | } | |
2284 | } | |
2285 | } | |
2286 | ||
2287 | group = g_malloc0(sizeof(*group)); | |
2288 | ||
2289 | snprintf(path, sizeof(path), "/dev/vfio/%d", groupid); | |
448058aa | 2290 | group->fd = qemu_open_old(path, O_RDWR); |
e2c7d025 | 2291 | if (group->fd < 0) { |
1b808d5b | 2292 | error_setg_errno(errp, errno, "failed to open %s", path); |
e2c7d025 EA |
2293 | goto free_group_exit; |
2294 | } | |
2295 | ||
2296 | if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) { | |
1b808d5b | 2297 | error_setg_errno(errp, errno, "failed to get group %d status", groupid); |
e2c7d025 EA |
2298 | goto close_fd_exit; |
2299 | } | |
2300 | ||
2301 | if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) { | |
1b808d5b EA |
2302 | error_setg(errp, "group %d is not viable", groupid); |
2303 | error_append_hint(errp, | |
2304 | "Please ensure all devices within the iommu_group " | |
2305 | "are bound to their vfio bus driver.\n"); | |
e2c7d025 EA |
2306 | goto close_fd_exit; |
2307 | } | |
2308 | ||
2309 | group->groupid = groupid; | |
2310 | QLIST_INIT(&group->device_list); | |
2311 | ||
1b808d5b EA |
2312 | if (vfio_connect_container(group, as, errp)) { |
2313 | error_prepend(errp, "failed to setup container for group %d: ", | |
2314 | groupid); | |
e2c7d025 EA |
2315 | goto close_fd_exit; |
2316 | } | |
2317 | ||
2318 | if (QLIST_EMPTY(&vfio_group_list)) { | |
2319 | qemu_register_reset(vfio_reset_handler, NULL); | |
2320 | } | |
2321 | ||
2322 | QLIST_INSERT_HEAD(&vfio_group_list, group, next); | |
2323 | ||
e2c7d025 EA |
2324 | return group; |
2325 | ||
2326 | close_fd_exit: | |
2327 | close(group->fd); | |
2328 | ||
2329 | free_group_exit: | |
2330 | g_free(group); | |
2331 | ||
2332 | return NULL; | |
2333 | } | |
2334 | ||
2335 | void vfio_put_group(VFIOGroup *group) | |
2336 | { | |
77a10d04 | 2337 | if (!group || !QLIST_EMPTY(&group->device_list)) { |
e2c7d025 EA |
2338 | return; |
2339 | } | |
2340 | ||
aff92b82 | 2341 | if (!group->ram_block_discard_allowed) { |
53d1b5fc | 2342 | vfio_ram_block_discard_disable(group->container, false); |
238e9172 | 2343 | } |
e2c7d025 EA |
2344 | vfio_kvm_device_del_group(group); |
2345 | vfio_disconnect_container(group); | |
2346 | QLIST_REMOVE(group, next); | |
2347 | trace_vfio_put_group(group->fd); | |
2348 | close(group->fd); | |
2349 | g_free(group); | |
2350 | ||
2351 | if (QLIST_EMPTY(&vfio_group_list)) { | |
2352 | qemu_unregister_reset(vfio_reset_handler, NULL); | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | int vfio_get_device(VFIOGroup *group, const char *name, | |
59f7d674 | 2357 | VFIODevice *vbasedev, Error **errp) |
e2c7d025 EA |
2358 | { |
2359 | struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) }; | |
217e9fdc | 2360 | int ret, fd; |
e2c7d025 | 2361 | |
217e9fdc PB |
2362 | fd = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name); |
2363 | if (fd < 0) { | |
59f7d674 EA |
2364 | error_setg_errno(errp, errno, "error getting device from group %d", |
2365 | group->groupid); | |
2366 | error_append_hint(errp, | |
2367 | "Verify all devices in group %d are bound to vfio-<bus> " | |
2368 | "or pci-stub and not already in use\n", group->groupid); | |
217e9fdc | 2369 | return fd; |
e2c7d025 EA |
2370 | } |
2371 | ||
217e9fdc | 2372 | ret = ioctl(fd, VFIO_DEVICE_GET_INFO, &dev_info); |
e2c7d025 | 2373 | if (ret) { |
59f7d674 | 2374 | error_setg_errno(errp, errno, "error getting device info"); |
217e9fdc PB |
2375 | close(fd); |
2376 | return ret; | |
e2c7d025 EA |
2377 | } |
2378 | ||
238e9172 | 2379 | /* |
aff92b82 DH |
2380 | * Set discarding of RAM as not broken for this group if the driver knows |
2381 | * the device operates compatibly with discarding. Setting must be | |
2382 | * consistent per group, but since compatibility is really only possible | |
2383 | * with mdev currently, we expect singleton groups. | |
238e9172 | 2384 | */ |
aff92b82 DH |
2385 | if (vbasedev->ram_block_discard_allowed != |
2386 | group->ram_block_discard_allowed) { | |
238e9172 | 2387 | if (!QLIST_EMPTY(&group->device_list)) { |
aff92b82 DH |
2388 | error_setg(errp, "Inconsistent setting of support for discarding " |
2389 | "RAM (e.g., balloon) within group"); | |
8709b395 | 2390 | close(fd); |
238e9172 AW |
2391 | return -1; |
2392 | } | |
2393 | ||
aff92b82 DH |
2394 | if (!group->ram_block_discard_allowed) { |
2395 | group->ram_block_discard_allowed = true; | |
53d1b5fc | 2396 | vfio_ram_block_discard_disable(group->container, false); |
238e9172 AW |
2397 | } |
2398 | } | |
2399 | ||
217e9fdc PB |
2400 | vbasedev->fd = fd; |
2401 | vbasedev->group = group; | |
2402 | QLIST_INSERT_HEAD(&group->device_list, vbasedev, next); | |
2403 | ||
e2c7d025 EA |
2404 | vbasedev->num_irqs = dev_info.num_irqs; |
2405 | vbasedev->num_regions = dev_info.num_regions; | |
2406 | vbasedev->flags = dev_info.flags; | |
2407 | ||
2408 | trace_vfio_get_device(name, dev_info.flags, dev_info.num_regions, | |
2409 | dev_info.num_irqs); | |
2410 | ||
2411 | vbasedev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET); | |
217e9fdc | 2412 | return 0; |
e2c7d025 EA |
2413 | } |
2414 | ||
2415 | void vfio_put_base_device(VFIODevice *vbasedev) | |
2416 | { | |
77a10d04 PB |
2417 | if (!vbasedev->group) { |
2418 | return; | |
2419 | } | |
e2c7d025 EA |
2420 | QLIST_REMOVE(vbasedev, next); |
2421 | vbasedev->group = NULL; | |
2422 | trace_vfio_put_base_device(vbasedev->fd); | |
2423 | close(vbasedev->fd); | |
2424 | } | |
2425 | ||
46900226 AW |
2426 | int vfio_get_region_info(VFIODevice *vbasedev, int index, |
2427 | struct vfio_region_info **info) | |
2428 | { | |
2429 | size_t argsz = sizeof(struct vfio_region_info); | |
2430 | ||
2431 | *info = g_malloc0(argsz); | |
2432 | ||
2433 | (*info)->index = index; | |
b53b0f69 | 2434 | retry: |
46900226 AW |
2435 | (*info)->argsz = argsz; |
2436 | ||
2437 | if (ioctl(vbasedev->fd, VFIO_DEVICE_GET_REGION_INFO, *info)) { | |
2438 | g_free(*info); | |
e61a424f | 2439 | *info = NULL; |
46900226 AW |
2440 | return -errno; |
2441 | } | |
2442 | ||
b53b0f69 AW |
2443 | if ((*info)->argsz > argsz) { |
2444 | argsz = (*info)->argsz; | |
2445 | *info = g_realloc(*info, argsz); | |
2446 | ||
2447 | goto retry; | |
2448 | } | |
2449 | ||
46900226 AW |
2450 | return 0; |
2451 | } | |
2452 | ||
e61a424f AW |
2453 | int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type, |
2454 | uint32_t subtype, struct vfio_region_info **info) | |
2455 | { | |
2456 | int i; | |
2457 | ||
2458 | for (i = 0; i < vbasedev->num_regions; i++) { | |
2459 | struct vfio_info_cap_header *hdr; | |
2460 | struct vfio_region_info_cap_type *cap_type; | |
2461 | ||
2462 | if (vfio_get_region_info(vbasedev, i, info)) { | |
2463 | continue; | |
2464 | } | |
2465 | ||
2466 | hdr = vfio_get_region_info_cap(*info, VFIO_REGION_INFO_CAP_TYPE); | |
2467 | if (!hdr) { | |
2468 | g_free(*info); | |
2469 | continue; | |
2470 | } | |
2471 | ||
2472 | cap_type = container_of(hdr, struct vfio_region_info_cap_type, header); | |
2473 | ||
2474 | trace_vfio_get_dev_region(vbasedev->name, i, | |
2475 | cap_type->type, cap_type->subtype); | |
2476 | ||
2477 | if (cap_type->type == type && cap_type->subtype == subtype) { | |
2478 | return 0; | |
2479 | } | |
2480 | ||
2481 | g_free(*info); | |
2482 | } | |
2483 | ||
2484 | *info = NULL; | |
2485 | return -ENODEV; | |
2486 | } | |
2487 | ||
ae0215b2 AK |
2488 | bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type) |
2489 | { | |
2490 | struct vfio_region_info *info = NULL; | |
2491 | bool ret = false; | |
2492 | ||
2493 | if (!vfio_get_region_info(vbasedev, region, &info)) { | |
2494 | if (vfio_get_region_info_cap(info, cap_type)) { | |
2495 | ret = true; | |
2496 | } | |
2497 | g_free(info); | |
2498 | } | |
2499 | ||
2500 | return ret; | |
2501 | } | |
2502 | ||
3153119e DG |
2503 | /* |
2504 | * Interfaces for IBM EEH (Enhanced Error Handling) | |
2505 | */ | |
2506 | static bool vfio_eeh_container_ok(VFIOContainer *container) | |
2507 | { | |
2508 | /* | |
2509 | * As of 2016-03-04 (linux-4.5) the host kernel EEH/VFIO | |
2510 | * implementation is broken if there are multiple groups in a | |
2511 | * container. The hardware works in units of Partitionable | |
2512 | * Endpoints (== IOMMU groups) and the EEH operations naively | |
2513 | * iterate across all groups in the container, without any logic | |
2514 | * to make sure the groups have their state synchronized. For | |
2515 | * certain operations (ENABLE) that might be ok, until an error | |
2516 | * occurs, but for others (GET_STATE) it's clearly broken. | |
2517 | */ | |
2518 | ||
2519 | /* | |
2520 | * XXX Once fixed kernels exist, test for them here | |
2521 | */ | |
2522 | ||
2523 | if (QLIST_EMPTY(&container->group_list)) { | |
2524 | return false; | |
2525 | } | |
2526 | ||
2527 | if (QLIST_NEXT(QLIST_FIRST(&container->group_list), container_next)) { | |
2528 | return false; | |
2529 | } | |
2530 | ||
2531 | return true; | |
2532 | } | |
2533 | ||
2534 | static int vfio_eeh_container_op(VFIOContainer *container, uint32_t op) | |
2535 | { | |
2536 | struct vfio_eeh_pe_op pe_op = { | |
2537 | .argsz = sizeof(pe_op), | |
2538 | .op = op, | |
2539 | }; | |
2540 | int ret; | |
2541 | ||
2542 | if (!vfio_eeh_container_ok(container)) { | |
2543 | error_report("vfio/eeh: EEH_PE_OP 0x%x: " | |
2544 | "kernel requires a container with exactly one group", op); | |
2545 | return -EPERM; | |
2546 | } | |
2547 | ||
2548 | ret = ioctl(container->fd, VFIO_EEH_PE_OP, &pe_op); | |
2549 | if (ret < 0) { | |
2550 | error_report("vfio/eeh: EEH_PE_OP 0x%x failed: %m", op); | |
2551 | return -errno; | |
2552 | } | |
2553 | ||
d917e88d | 2554 | return ret; |
3153119e DG |
2555 | } |
2556 | ||
2557 | static VFIOContainer *vfio_eeh_as_container(AddressSpace *as) | |
2558 | { | |
2559 | VFIOAddressSpace *space = vfio_get_address_space(as); | |
2560 | VFIOContainer *container = NULL; | |
2561 | ||
2562 | if (QLIST_EMPTY(&space->containers)) { | |
2563 | /* No containers to act on */ | |
2564 | goto out; | |
2565 | } | |
2566 | ||
2567 | container = QLIST_FIRST(&space->containers); | |
2568 | ||
2569 | if (QLIST_NEXT(container, next)) { | |
2570 | /* We don't yet have logic to synchronize EEH state across | |
2571 | * multiple containers */ | |
2572 | container = NULL; | |
2573 | goto out; | |
2574 | } | |
2575 | ||
2576 | out: | |
2577 | vfio_put_address_space(space); | |
2578 | return container; | |
2579 | } | |
2580 | ||
2581 | bool vfio_eeh_as_ok(AddressSpace *as) | |
2582 | { | |
2583 | VFIOContainer *container = vfio_eeh_as_container(as); | |
2584 | ||
2585 | return (container != NULL) && vfio_eeh_container_ok(container); | |
2586 | } | |
2587 | ||
2588 | int vfio_eeh_as_op(AddressSpace *as, uint32_t op) | |
2589 | { | |
2590 | VFIOContainer *container = vfio_eeh_as_container(as); | |
2591 | ||
2592 | if (!container) { | |
2593 | return -ENODEV; | |
2594 | } | |
2595 | return vfio_eeh_container_op(container, op); | |
2596 | } |