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Commit | Line | Data |
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05330448 AL |
1 | /* |
2 | * QEMU KVM support | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5832d1f2 | 5 | * Red Hat, Inc. 2008 |
05330448 AL |
6 | * |
7 | * Authors: | |
8 | * Anthony Liguori <aliguori@us.ibm.com> | |
5832d1f2 | 9 | * Glauber Costa <gcosta@redhat.com> |
05330448 AL |
10 | * |
11 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
12 | * See the COPYING file in the top-level directory. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <sys/types.h> | |
17 | #include <sys/ioctl.h> | |
18 | #include <sys/mman.h> | |
984b5181 | 19 | #include <stdarg.h> |
05330448 AL |
20 | |
21 | #include <linux/kvm.h> | |
22 | ||
23 | #include "qemu-common.h" | |
1de7afc9 PB |
24 | #include "qemu/atomic.h" |
25 | #include "qemu/option.h" | |
26 | #include "qemu/config-file.h" | |
9c17d615 | 27 | #include "sysemu/sysemu.h" |
d33a1810 | 28 | #include "hw/hw.h" |
a2cb15b0 | 29 | #include "hw/pci/msi.h" |
d426d9fb | 30 | #include "hw/s390x/adapter.h" |
022c62cb | 31 | #include "exec/gdbstub.h" |
9c17d615 | 32 | #include "sysemu/kvm.h" |
1de7afc9 | 33 | #include "qemu/bswap.h" |
022c62cb | 34 | #include "exec/memory.h" |
747afd5b | 35 | #include "exec/ram_addr.h" |
022c62cb | 36 | #include "exec/address-spaces.h" |
1de7afc9 | 37 | #include "qemu/event_notifier.h" |
9c775729 | 38 | #include "trace.h" |
05330448 | 39 | |
135a129a AK |
40 | #include "hw/boards.h" |
41 | ||
d2f2b8a7 SH |
42 | /* This check must be after config-host.h is included */ |
43 | #ifdef CONFIG_EVENTFD | |
44 | #include <sys/eventfd.h> | |
45 | #endif | |
46 | ||
93148aa5 | 47 | /* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */ |
f65ed4c1 AL |
48 | #define PAGE_SIZE TARGET_PAGE_SIZE |
49 | ||
05330448 AL |
50 | //#define DEBUG_KVM |
51 | ||
52 | #ifdef DEBUG_KVM | |
8c0d577e | 53 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
54 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
55 | #else | |
8c0d577e | 56 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
57 | do { } while (0) |
58 | #endif | |
59 | ||
04fa27f5 JK |
60 | #define KVM_MSI_HASHTAB_SIZE 256 |
61 | ||
34fc643f AL |
62 | typedef struct KVMSlot |
63 | { | |
a8170e5e | 64 | hwaddr start_addr; |
c227f099 | 65 | ram_addr_t memory_size; |
9f213ed9 | 66 | void *ram; |
34fc643f AL |
67 | int slot; |
68 | int flags; | |
69 | } KVMSlot; | |
05330448 | 70 | |
5832d1f2 AL |
71 | typedef struct kvm_dirty_log KVMDirtyLog; |
72 | ||
05330448 AL |
73 | struct KVMState |
74 | { | |
fb541ca5 AW |
75 | KVMSlot *slots; |
76 | int nr_slots; | |
05330448 AL |
77 | int fd; |
78 | int vmfd; | |
f65ed4c1 | 79 | int coalesced_mmio; |
62a2744c | 80 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 81 | bool coalesced_flush_in_progress; |
e69917e2 | 82 | int broken_set_mem_region; |
4495d6a7 | 83 | int migration_log; |
a0fb002c | 84 | int vcpu_events; |
b0b1d690 | 85 | int robust_singlestep; |
ff44f1a3 | 86 | int debugregs; |
e22a25c9 AL |
87 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
88 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
89 | #endif | |
8a7c7393 | 90 | int pit_state2; |
f1665b21 | 91 | int xsave, xcrs; |
d2f2b8a7 | 92 | int many_ioeventfds; |
3ab73842 | 93 | int intx_set_mask; |
92e4b519 DG |
94 | /* The man page (and posix) say ioctl numbers are signed int, but |
95 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
96 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 97 | unsigned irq_set_ioctl; |
aed6efb9 | 98 | unsigned int sigmask_len; |
84b058d7 JK |
99 | #ifdef KVM_CAP_IRQ_ROUTING |
100 | struct kvm_irq_routing *irq_routes; | |
101 | int nr_allocated_irq_routes; | |
102 | uint32_t *used_gsi_bitmap; | |
4e2e4e63 | 103 | unsigned int gsi_count; |
04fa27f5 | 104 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
4a3adebb | 105 | bool direct_msi; |
84b058d7 | 106 | #endif |
05330448 AL |
107 | }; |
108 | ||
6a7af8cb | 109 | KVMState *kvm_state; |
3d4b2649 | 110 | bool kvm_kernel_irqchip; |
7ae26bd4 | 111 | bool kvm_async_interrupts_allowed; |
215e79c0 | 112 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 113 | bool kvm_eventfds_allowed; |
cc7e0ddf | 114 | bool kvm_irqfds_allowed; |
614e41bc | 115 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 116 | bool kvm_gsi_routing_allowed; |
76fe21de | 117 | bool kvm_gsi_direct_mapping; |
13eed94e | 118 | bool kvm_allowed; |
df9c8b75 | 119 | bool kvm_readonly_mem_allowed; |
05330448 | 120 | |
94a8d39a JK |
121 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
122 | KVM_CAP_INFO(USER_MEMORY), | |
123 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
124 | KVM_CAP_LAST_INFO | |
125 | }; | |
126 | ||
05330448 AL |
127 | static KVMSlot *kvm_alloc_slot(KVMState *s) |
128 | { | |
129 | int i; | |
130 | ||
fb541ca5 | 131 | for (i = 0; i < s->nr_slots; i++) { |
a426e122 | 132 | if (s->slots[i].memory_size == 0) { |
05330448 | 133 | return &s->slots[i]; |
a426e122 | 134 | } |
05330448 AL |
135 | } |
136 | ||
d3f8d37f AL |
137 | fprintf(stderr, "%s: no free slot available\n", __func__); |
138 | abort(); | |
139 | } | |
140 | ||
141 | static KVMSlot *kvm_lookup_matching_slot(KVMState *s, | |
a8170e5e AK |
142 | hwaddr start_addr, |
143 | hwaddr end_addr) | |
d3f8d37f AL |
144 | { |
145 | int i; | |
146 | ||
fb541ca5 | 147 | for (i = 0; i < s->nr_slots; i++) { |
d3f8d37f AL |
148 | KVMSlot *mem = &s->slots[i]; |
149 | ||
150 | if (start_addr == mem->start_addr && | |
151 | end_addr == mem->start_addr + mem->memory_size) { | |
152 | return mem; | |
153 | } | |
154 | } | |
155 | ||
05330448 AL |
156 | return NULL; |
157 | } | |
158 | ||
6152e2ae AL |
159 | /* |
160 | * Find overlapping slot with lowest start address | |
161 | */ | |
162 | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s, | |
a8170e5e AK |
163 | hwaddr start_addr, |
164 | hwaddr end_addr) | |
05330448 | 165 | { |
6152e2ae | 166 | KVMSlot *found = NULL; |
05330448 AL |
167 | int i; |
168 | ||
fb541ca5 | 169 | for (i = 0; i < s->nr_slots; i++) { |
05330448 AL |
170 | KVMSlot *mem = &s->slots[i]; |
171 | ||
6152e2ae AL |
172 | if (mem->memory_size == 0 || |
173 | (found && found->start_addr < mem->start_addr)) { | |
174 | continue; | |
175 | } | |
176 | ||
177 | if (end_addr > mem->start_addr && | |
178 | start_addr < mem->start_addr + mem->memory_size) { | |
179 | found = mem; | |
180 | } | |
05330448 AL |
181 | } |
182 | ||
6152e2ae | 183 | return found; |
05330448 AL |
184 | } |
185 | ||
9f213ed9 | 186 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 187 | hwaddr *phys_addr) |
983dfc3b HY |
188 | { |
189 | int i; | |
190 | ||
fb541ca5 | 191 | for (i = 0; i < s->nr_slots; i++) { |
983dfc3b HY |
192 | KVMSlot *mem = &s->slots[i]; |
193 | ||
9f213ed9 AK |
194 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
195 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
983dfc3b HY |
196 | return 1; |
197 | } | |
198 | } | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
5832d1f2 AL |
203 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
204 | { | |
205 | struct kvm_userspace_memory_region mem; | |
206 | ||
207 | mem.slot = slot->slot; | |
208 | mem.guest_phys_addr = slot->start_addr; | |
9f213ed9 | 209 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 210 | mem.flags = slot->flags; |
4495d6a7 JK |
211 | if (s->migration_log) { |
212 | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
213 | } | |
651eb0f4 XG |
214 | |
215 | if (slot->memory_size && mem.flags & KVM_MEM_READONLY) { | |
235e8982 JJ |
216 | /* Set the slot size to 0 before setting the slot to the desired |
217 | * value. This is needed based on KVM commit 75d61fbc. */ | |
218 | mem.memory_size = 0; | |
219 | kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
220 | } | |
221 | mem.memory_size = slot->memory_size; | |
5832d1f2 AL |
222 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
223 | } | |
224 | ||
504134d2 | 225 | int kvm_init_vcpu(CPUState *cpu) |
05330448 AL |
226 | { |
227 | KVMState *s = kvm_state; | |
228 | long mmap_size; | |
229 | int ret; | |
230 | ||
8c0d577e | 231 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 232 | |
b164e48e | 233 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)kvm_arch_vcpu_id(cpu)); |
05330448 | 234 | if (ret < 0) { |
8c0d577e | 235 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
236 | goto err; |
237 | } | |
238 | ||
8737c51c | 239 | cpu->kvm_fd = ret; |
a60f24b5 | 240 | cpu->kvm_state = s; |
20d695a9 | 241 | cpu->kvm_vcpu_dirty = true; |
05330448 AL |
242 | |
243 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
244 | if (mmap_size < 0) { | |
748a680b | 245 | ret = mmap_size; |
8c0d577e | 246 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
247 | goto err; |
248 | } | |
249 | ||
f7575c96 | 250 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 251 | cpu->kvm_fd, 0); |
f7575c96 | 252 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 253 | ret = -errno; |
8c0d577e | 254 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
255 | goto err; |
256 | } | |
257 | ||
a426e122 JK |
258 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
259 | s->coalesced_mmio_ring = | |
f7575c96 | 260 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 261 | } |
62a2744c | 262 | |
20d695a9 | 263 | ret = kvm_arch_init_vcpu(cpu); |
05330448 AL |
264 | err: |
265 | return ret; | |
266 | } | |
267 | ||
5832d1f2 AL |
268 | /* |
269 | * dirty pages logging control | |
270 | */ | |
25254bbc | 271 | |
235e8982 | 272 | static int kvm_mem_flags(KVMState *s, bool log_dirty, bool readonly) |
25254bbc | 273 | { |
235e8982 JJ |
274 | int flags = 0; |
275 | flags = log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0; | |
276 | if (readonly && kvm_readonly_mem_allowed) { | |
277 | flags |= KVM_MEM_READONLY; | |
278 | } | |
279 | return flags; | |
25254bbc MT |
280 | } |
281 | ||
282 | static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty) | |
5832d1f2 AL |
283 | { |
284 | KVMState *s = kvm_state; | |
25254bbc | 285 | int flags, mask = KVM_MEM_LOG_DIRTY_PAGES; |
4495d6a7 JK |
286 | int old_flags; |
287 | ||
4495d6a7 | 288 | old_flags = mem->flags; |
5832d1f2 | 289 | |
235e8982 | 290 | flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty, false); |
5832d1f2 AL |
291 | mem->flags = flags; |
292 | ||
4495d6a7 JK |
293 | /* If nothing changed effectively, no need to issue ioctl */ |
294 | if (s->migration_log) { | |
295 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
296 | } | |
25254bbc | 297 | |
4495d6a7 | 298 | if (flags == old_flags) { |
25254bbc | 299 | return 0; |
4495d6a7 JK |
300 | } |
301 | ||
5832d1f2 AL |
302 | return kvm_set_user_memory_region(s, mem); |
303 | } | |
304 | ||
a8170e5e | 305 | static int kvm_dirty_pages_log_change(hwaddr phys_addr, |
25254bbc MT |
306 | ram_addr_t size, bool log_dirty) |
307 | { | |
308 | KVMState *s = kvm_state; | |
309 | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); | |
310 | ||
311 | if (mem == NULL) { | |
312 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" | |
313 | TARGET_FMT_plx "\n", __func__, phys_addr, | |
a8170e5e | 314 | (hwaddr)(phys_addr + size - 1)); |
25254bbc MT |
315 | return -EINVAL; |
316 | } | |
317 | return kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
318 | } | |
319 | ||
a01672d3 AK |
320 | static void kvm_log_start(MemoryListener *listener, |
321 | MemoryRegionSection *section) | |
5832d1f2 | 322 | { |
a01672d3 AK |
323 | int r; |
324 | ||
325 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
052e87b0 | 326 | int128_get64(section->size), true); |
a01672d3 AK |
327 | if (r < 0) { |
328 | abort(); | |
329 | } | |
5832d1f2 AL |
330 | } |
331 | ||
a01672d3 AK |
332 | static void kvm_log_stop(MemoryListener *listener, |
333 | MemoryRegionSection *section) | |
5832d1f2 | 334 | { |
a01672d3 AK |
335 | int r; |
336 | ||
337 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
052e87b0 | 338 | int128_get64(section->size), false); |
a01672d3 AK |
339 | if (r < 0) { |
340 | abort(); | |
341 | } | |
5832d1f2 AL |
342 | } |
343 | ||
7b8f3b78 | 344 | static int kvm_set_migration_log(int enable) |
4495d6a7 JK |
345 | { |
346 | KVMState *s = kvm_state; | |
347 | KVMSlot *mem; | |
348 | int i, err; | |
349 | ||
350 | s->migration_log = enable; | |
351 | ||
fb541ca5 | 352 | for (i = 0; i < s->nr_slots; i++) { |
4495d6a7 JK |
353 | mem = &s->slots[i]; |
354 | ||
70fedd76 AW |
355 | if (!mem->memory_size) { |
356 | continue; | |
357 | } | |
4495d6a7 JK |
358 | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) { |
359 | continue; | |
360 | } | |
361 | err = kvm_set_user_memory_region(s, mem); | |
362 | if (err) { | |
363 | return err; | |
364 | } | |
365 | } | |
366 | return 0; | |
367 | } | |
368 | ||
8369e01c | 369 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
370 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
371 | unsigned long *bitmap) | |
96c1606b | 372 | { |
c9dd46fc | 373 | ram_addr_t start = section->offset_within_region + section->mr->ram_addr; |
5ff7fb77 JQ |
374 | ram_addr_t pages = int128_get64(section->size) / getpagesize(); |
375 | ||
376 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
8369e01c | 377 | return 0; |
96c1606b AG |
378 | } |
379 | ||
8369e01c MT |
380 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
381 | ||
5832d1f2 AL |
382 | /** |
383 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
fd4aa979 BS |
384 | * This function updates qemu's dirty bitmap using |
385 | * memory_region_set_dirty(). This means all bits are set | |
386 | * to dirty. | |
5832d1f2 | 387 | * |
d3f8d37f | 388 | * @start_add: start of logged region. |
5832d1f2 AL |
389 | * @end_addr: end of logged region. |
390 | */ | |
ffcde12f | 391 | static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section) |
5832d1f2 AL |
392 | { |
393 | KVMState *s = kvm_state; | |
151f7749 | 394 | unsigned long size, allocated_size = 0; |
151f7749 JK |
395 | KVMDirtyLog d; |
396 | KVMSlot *mem; | |
397 | int ret = 0; | |
a8170e5e | 398 | hwaddr start_addr = section->offset_within_address_space; |
052e87b0 | 399 | hwaddr end_addr = start_addr + int128_get64(section->size); |
5832d1f2 | 400 | |
151f7749 JK |
401 | d.dirty_bitmap = NULL; |
402 | while (start_addr < end_addr) { | |
403 | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); | |
404 | if (mem == NULL) { | |
405 | break; | |
406 | } | |
5832d1f2 | 407 | |
51b0c606 MT |
408 | /* XXX bad kernel interface alert |
409 | * For dirty bitmap, kernel allocates array of size aligned to | |
410 | * bits-per-long. But for case when the kernel is 64bits and | |
411 | * the userspace is 32bits, userspace can't align to the same | |
412 | * bits-per-long, since sizeof(long) is different between kernel | |
413 | * and user space. This way, userspace will provide buffer which | |
414 | * may be 4 bytes less than the kernel will use, resulting in | |
415 | * userspace memory corruption (which is not detectable by valgrind | |
416 | * too, in most cases). | |
417 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
418 | * a hope that sizeof(long) wont become >8 any time soon. | |
419 | */ | |
420 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
421 | /*HOST_LONG_BITS*/ 64) / 8; | |
151f7749 | 422 | if (!d.dirty_bitmap) { |
7267c094 | 423 | d.dirty_bitmap = g_malloc(size); |
151f7749 | 424 | } else if (size > allocated_size) { |
7267c094 | 425 | d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); |
151f7749 JK |
426 | } |
427 | allocated_size = size; | |
428 | memset(d.dirty_bitmap, 0, allocated_size); | |
5832d1f2 | 429 | |
151f7749 | 430 | d.slot = mem->slot; |
5832d1f2 | 431 | |
50212d63 | 432 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 433 | DPRINTF("ioctl failed %d\n", errno); |
151f7749 JK |
434 | ret = -1; |
435 | break; | |
436 | } | |
5832d1f2 | 437 | |
ffcde12f | 438 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); |
8369e01c | 439 | start_addr = mem->start_addr + mem->memory_size; |
5832d1f2 | 440 | } |
7267c094 | 441 | g_free(d.dirty_bitmap); |
151f7749 JK |
442 | |
443 | return ret; | |
5832d1f2 AL |
444 | } |
445 | ||
95d2994a AK |
446 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
447 | MemoryRegionSection *secion, | |
a8170e5e | 448 | hwaddr start, hwaddr size) |
f65ed4c1 | 449 | { |
f65ed4c1 AL |
450 | KVMState *s = kvm_state; |
451 | ||
452 | if (s->coalesced_mmio) { | |
453 | struct kvm_coalesced_mmio_zone zone; | |
454 | ||
455 | zone.addr = start; | |
456 | zone.size = size; | |
7e680753 | 457 | zone.pad = 0; |
f65ed4c1 | 458 | |
95d2994a | 459 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 460 | } |
f65ed4c1 AL |
461 | } |
462 | ||
95d2994a AK |
463 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
464 | MemoryRegionSection *secion, | |
a8170e5e | 465 | hwaddr start, hwaddr size) |
f65ed4c1 | 466 | { |
f65ed4c1 AL |
467 | KVMState *s = kvm_state; |
468 | ||
469 | if (s->coalesced_mmio) { | |
470 | struct kvm_coalesced_mmio_zone zone; | |
471 | ||
472 | zone.addr = start; | |
473 | zone.size = size; | |
7e680753 | 474 | zone.pad = 0; |
f65ed4c1 | 475 | |
95d2994a | 476 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 477 | } |
f65ed4c1 AL |
478 | } |
479 | ||
ad7b8b33 AL |
480 | int kvm_check_extension(KVMState *s, unsigned int extension) |
481 | { | |
482 | int ret; | |
483 | ||
484 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
485 | if (ret < 0) { | |
486 | ret = 0; | |
487 | } | |
488 | ||
489 | return ret; | |
490 | } | |
491 | ||
7d0a07fa AG |
492 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
493 | { | |
494 | int ret; | |
495 | ||
496 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
497 | if (ret < 0) { | |
498 | /* VM wide version not implemented, use global one instead */ | |
499 | ret = kvm_check_extension(s, extension); | |
500 | } | |
501 | ||
502 | return ret; | |
503 | } | |
504 | ||
584f2be7 | 505 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 506 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
507 | { |
508 | int ret; | |
509 | struct kvm_ioeventfd iofd; | |
510 | ||
41cb62c2 | 511 | iofd.datamatch = datamatch ? val : 0; |
500ffd4a MT |
512 | iofd.addr = addr; |
513 | iofd.len = size; | |
41cb62c2 | 514 | iofd.flags = 0; |
500ffd4a MT |
515 | iofd.fd = fd; |
516 | ||
517 | if (!kvm_enabled()) { | |
518 | return -ENOSYS; | |
519 | } | |
520 | ||
41cb62c2 MT |
521 | if (datamatch) { |
522 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
523 | } | |
500ffd4a MT |
524 | if (!assign) { |
525 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
526 | } | |
527 | ||
528 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
529 | ||
530 | if (ret < 0) { | |
531 | return -errno; | |
532 | } | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
44c3f8f7 | 537 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 538 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
539 | { |
540 | struct kvm_ioeventfd kick = { | |
41cb62c2 | 541 | .datamatch = datamatch ? val : 0, |
500ffd4a | 542 | .addr = addr, |
41cb62c2 | 543 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 544 | .len = size, |
500ffd4a MT |
545 | .fd = fd, |
546 | }; | |
547 | int r; | |
548 | if (!kvm_enabled()) { | |
549 | return -ENOSYS; | |
550 | } | |
41cb62c2 MT |
551 | if (datamatch) { |
552 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
553 | } | |
500ffd4a MT |
554 | if (!assign) { |
555 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
556 | } | |
557 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
558 | if (r < 0) { | |
559 | return r; | |
560 | } | |
561 | return 0; | |
562 | } | |
563 | ||
564 | ||
d2f2b8a7 SH |
565 | static int kvm_check_many_ioeventfds(void) |
566 | { | |
d0dcac83 SH |
567 | /* Userspace can use ioeventfd for io notification. This requires a host |
568 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
569 | * support SIGIO it cannot interrupt the vcpu. | |
570 | * | |
571 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
572 | * can avoid creating too many ioeventfds. |
573 | */ | |
12d4536f | 574 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
575 | int ioeventfds[7]; |
576 | int i, ret = 0; | |
577 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
578 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
579 | if (ioeventfds[i] < 0) { | |
580 | break; | |
581 | } | |
41cb62c2 | 582 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
583 | if (ret < 0) { |
584 | close(ioeventfds[i]); | |
585 | break; | |
586 | } | |
587 | } | |
588 | ||
589 | /* Decide whether many devices are supported or not */ | |
590 | ret = i == ARRAY_SIZE(ioeventfds); | |
591 | ||
592 | while (i-- > 0) { | |
41cb62c2 | 593 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
594 | close(ioeventfds[i]); |
595 | } | |
596 | return ret; | |
597 | #else | |
598 | return 0; | |
599 | #endif | |
600 | } | |
601 | ||
94a8d39a JK |
602 | static const KVMCapabilityInfo * |
603 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
604 | { | |
605 | while (list->name) { | |
606 | if (!kvm_check_extension(s, list->value)) { | |
607 | return list; | |
608 | } | |
609 | list++; | |
610 | } | |
611 | return NULL; | |
612 | } | |
613 | ||
a01672d3 | 614 | static void kvm_set_phys_mem(MemoryRegionSection *section, bool add) |
46dbef6a MT |
615 | { |
616 | KVMState *s = kvm_state; | |
46dbef6a MT |
617 | KVMSlot *mem, old; |
618 | int err; | |
a01672d3 AK |
619 | MemoryRegion *mr = section->mr; |
620 | bool log_dirty = memory_region_is_logging(mr); | |
235e8982 JJ |
621 | bool writeable = !mr->readonly && !mr->rom_device; |
622 | bool readonly_flag = mr->readonly || memory_region_is_romd(mr); | |
a8170e5e | 623 | hwaddr start_addr = section->offset_within_address_space; |
052e87b0 | 624 | ram_addr_t size = int128_get64(section->size); |
9f213ed9 | 625 | void *ram = NULL; |
8f6f962b | 626 | unsigned delta; |
46dbef6a | 627 | |
14542fea GN |
628 | /* kvm works in page size chunks, but the function may be called |
629 | with sub-page size and unaligned start address. */ | |
8f6f962b AK |
630 | delta = TARGET_PAGE_ALIGN(size) - size; |
631 | if (delta > size) { | |
632 | return; | |
633 | } | |
634 | start_addr += delta; | |
635 | size -= delta; | |
636 | size &= TARGET_PAGE_MASK; | |
637 | if (!size || (start_addr & ~TARGET_PAGE_MASK)) { | |
638 | return; | |
639 | } | |
46dbef6a | 640 | |
a01672d3 | 641 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
642 | if (writeable || !kvm_readonly_mem_allowed) { |
643 | return; | |
644 | } else if (!mr->romd_mode) { | |
645 | /* If the memory device is not in romd_mode, then we actually want | |
646 | * to remove the kvm memory slot so all accesses will trap. */ | |
647 | add = false; | |
648 | } | |
9f213ed9 AK |
649 | } |
650 | ||
8f6f962b | 651 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; |
a01672d3 | 652 | |
46dbef6a MT |
653 | while (1) { |
654 | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); | |
655 | if (!mem) { | |
656 | break; | |
657 | } | |
658 | ||
a01672d3 | 659 | if (add && start_addr >= mem->start_addr && |
46dbef6a | 660 | (start_addr + size <= mem->start_addr + mem->memory_size) && |
9f213ed9 | 661 | (ram - start_addr == mem->ram - mem->start_addr)) { |
46dbef6a | 662 | /* The new slot fits into the existing one and comes with |
25254bbc MT |
663 | * identical parameters - update flags and done. */ |
664 | kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
46dbef6a MT |
665 | return; |
666 | } | |
667 | ||
668 | old = *mem; | |
669 | ||
3fbffb62 AK |
670 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
671 | kvm_physical_sync_dirty_bitmap(section); | |
672 | } | |
673 | ||
46dbef6a MT |
674 | /* unregister the overlapping slot */ |
675 | mem->memory_size = 0; | |
676 | err = kvm_set_user_memory_region(s, mem); | |
677 | if (err) { | |
678 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
679 | __func__, strerror(-err)); | |
680 | abort(); | |
681 | } | |
682 | ||
683 | /* Workaround for older KVM versions: we can't join slots, even not by | |
684 | * unregistering the previous ones and then registering the larger | |
685 | * slot. We have to maintain the existing fragmentation. Sigh. | |
686 | * | |
687 | * This workaround assumes that the new slot starts at the same | |
688 | * address as the first existing one. If not or if some overlapping | |
689 | * slot comes around later, we will fail (not seen in practice so far) | |
690 | * - and actually require a recent KVM version. */ | |
691 | if (s->broken_set_mem_region && | |
a01672d3 | 692 | old.start_addr == start_addr && old.memory_size < size && add) { |
46dbef6a MT |
693 | mem = kvm_alloc_slot(s); |
694 | mem->memory_size = old.memory_size; | |
695 | mem->start_addr = old.start_addr; | |
9f213ed9 | 696 | mem->ram = old.ram; |
235e8982 | 697 | mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); |
46dbef6a MT |
698 | |
699 | err = kvm_set_user_memory_region(s, mem); | |
700 | if (err) { | |
701 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
702 | strerror(-err)); | |
703 | abort(); | |
704 | } | |
705 | ||
706 | start_addr += old.memory_size; | |
9f213ed9 | 707 | ram += old.memory_size; |
46dbef6a MT |
708 | size -= old.memory_size; |
709 | continue; | |
710 | } | |
711 | ||
712 | /* register prefix slot */ | |
713 | if (old.start_addr < start_addr) { | |
714 | mem = kvm_alloc_slot(s); | |
715 | mem->memory_size = start_addr - old.start_addr; | |
716 | mem->start_addr = old.start_addr; | |
9f213ed9 | 717 | mem->ram = old.ram; |
235e8982 | 718 | mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); |
46dbef6a MT |
719 | |
720 | err = kvm_set_user_memory_region(s, mem); | |
721 | if (err) { | |
722 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
723 | __func__, strerror(-err)); | |
d4d6868f AG |
724 | #ifdef TARGET_PPC |
725 | fprintf(stderr, "%s: This is probably because your kernel's " \ | |
726 | "PAGE_SIZE is too big. Please try to use 4k " \ | |
727 | "PAGE_SIZE!\n", __func__); | |
728 | #endif | |
46dbef6a MT |
729 | abort(); |
730 | } | |
731 | } | |
732 | ||
733 | /* register suffix slot */ | |
734 | if (old.start_addr + old.memory_size > start_addr + size) { | |
735 | ram_addr_t size_delta; | |
736 | ||
737 | mem = kvm_alloc_slot(s); | |
738 | mem->start_addr = start_addr + size; | |
739 | size_delta = mem->start_addr - old.start_addr; | |
740 | mem->memory_size = old.memory_size - size_delta; | |
9f213ed9 | 741 | mem->ram = old.ram + size_delta; |
235e8982 | 742 | mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); |
46dbef6a MT |
743 | |
744 | err = kvm_set_user_memory_region(s, mem); | |
745 | if (err) { | |
746 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
747 | __func__, strerror(-err)); | |
748 | abort(); | |
749 | } | |
750 | } | |
751 | } | |
752 | ||
753 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
a426e122 | 754 | if (!size) { |
46dbef6a | 755 | return; |
a426e122 | 756 | } |
a01672d3 | 757 | if (!add) { |
46dbef6a | 758 | return; |
a426e122 | 759 | } |
46dbef6a MT |
760 | mem = kvm_alloc_slot(s); |
761 | mem->memory_size = size; | |
762 | mem->start_addr = start_addr; | |
9f213ed9 | 763 | mem->ram = ram; |
235e8982 | 764 | mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); |
46dbef6a MT |
765 | |
766 | err = kvm_set_user_memory_region(s, mem); | |
767 | if (err) { | |
768 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
769 | strerror(-err)); | |
770 | abort(); | |
771 | } | |
772 | } | |
773 | ||
a01672d3 AK |
774 | static void kvm_region_add(MemoryListener *listener, |
775 | MemoryRegionSection *section) | |
776 | { | |
dfde4e6e | 777 | memory_region_ref(section->mr); |
a01672d3 AK |
778 | kvm_set_phys_mem(section, true); |
779 | } | |
780 | ||
781 | static void kvm_region_del(MemoryListener *listener, | |
782 | MemoryRegionSection *section) | |
783 | { | |
784 | kvm_set_phys_mem(section, false); | |
dfde4e6e | 785 | memory_region_unref(section->mr); |
a01672d3 AK |
786 | } |
787 | ||
788 | static void kvm_log_sync(MemoryListener *listener, | |
789 | MemoryRegionSection *section) | |
7b8f3b78 | 790 | { |
a01672d3 AK |
791 | int r; |
792 | ||
ffcde12f | 793 | r = kvm_physical_sync_dirty_bitmap(section); |
a01672d3 AK |
794 | if (r < 0) { |
795 | abort(); | |
796 | } | |
7b8f3b78 MT |
797 | } |
798 | ||
a01672d3 | 799 | static void kvm_log_global_start(struct MemoryListener *listener) |
7b8f3b78 | 800 | { |
a01672d3 AK |
801 | int r; |
802 | ||
803 | r = kvm_set_migration_log(1); | |
804 | assert(r >= 0); | |
7b8f3b78 MT |
805 | } |
806 | ||
a01672d3 | 807 | static void kvm_log_global_stop(struct MemoryListener *listener) |
7b8f3b78 | 808 | { |
a01672d3 AK |
809 | int r; |
810 | ||
811 | r = kvm_set_migration_log(0); | |
812 | assert(r >= 0); | |
7b8f3b78 MT |
813 | } |
814 | ||
d22b096e AK |
815 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
816 | MemoryRegionSection *section, | |
817 | bool match_data, uint64_t data, | |
818 | EventNotifier *e) | |
819 | { | |
820 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
821 | int r; |
822 | ||
4b8f1c88 | 823 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
824 | data, true, int128_get64(section->size), |
825 | match_data); | |
80a1ea37 | 826 | if (r < 0) { |
fa4ba923 AK |
827 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", |
828 | __func__, strerror(-r)); | |
80a1ea37 AK |
829 | abort(); |
830 | } | |
831 | } | |
832 | ||
d22b096e AK |
833 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
834 | MemoryRegionSection *section, | |
835 | bool match_data, uint64_t data, | |
836 | EventNotifier *e) | |
80a1ea37 | 837 | { |
d22b096e | 838 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
839 | int r; |
840 | ||
4b8f1c88 | 841 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
842 | data, false, int128_get64(section->size), |
843 | match_data); | |
80a1ea37 AK |
844 | if (r < 0) { |
845 | abort(); | |
846 | } | |
847 | } | |
848 | ||
d22b096e AK |
849 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
850 | MemoryRegionSection *section, | |
851 | bool match_data, uint64_t data, | |
852 | EventNotifier *e) | |
80a1ea37 | 853 | { |
d22b096e | 854 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
855 | int r; |
856 | ||
44c3f8f7 | 857 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
858 | data, true, int128_get64(section->size), |
859 | match_data); | |
80a1ea37 | 860 | if (r < 0) { |
fa4ba923 AK |
861 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", |
862 | __func__, strerror(-r)); | |
80a1ea37 AK |
863 | abort(); |
864 | } | |
865 | } | |
866 | ||
d22b096e AK |
867 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
868 | MemoryRegionSection *section, | |
869 | bool match_data, uint64_t data, | |
870 | EventNotifier *e) | |
80a1ea37 AK |
871 | |
872 | { | |
d22b096e | 873 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
874 | int r; |
875 | ||
44c3f8f7 | 876 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
877 | data, false, int128_get64(section->size), |
878 | match_data); | |
80a1ea37 AK |
879 | if (r < 0) { |
880 | abort(); | |
881 | } | |
882 | } | |
883 | ||
a01672d3 AK |
884 | static MemoryListener kvm_memory_listener = { |
885 | .region_add = kvm_region_add, | |
886 | .region_del = kvm_region_del, | |
e5896b12 AP |
887 | .log_start = kvm_log_start, |
888 | .log_stop = kvm_log_stop, | |
a01672d3 AK |
889 | .log_sync = kvm_log_sync, |
890 | .log_global_start = kvm_log_global_start, | |
891 | .log_global_stop = kvm_log_global_stop, | |
d22b096e AK |
892 | .eventfd_add = kvm_mem_ioeventfd_add, |
893 | .eventfd_del = kvm_mem_ioeventfd_del, | |
95d2994a AK |
894 | .coalesced_mmio_add = kvm_coalesce_mmio_region, |
895 | .coalesced_mmio_del = kvm_uncoalesce_mmio_region, | |
d22b096e AK |
896 | .priority = 10, |
897 | }; | |
898 | ||
899 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
900 | .eventfd_add = kvm_io_ioeventfd_add, |
901 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 902 | .priority = 10, |
7b8f3b78 MT |
903 | }; |
904 | ||
c3affe56 | 905 | static void kvm_handle_interrupt(CPUState *cpu, int mask) |
aa7f74d1 | 906 | { |
259186a7 | 907 | cpu->interrupt_request |= mask; |
aa7f74d1 | 908 | |
60e82579 | 909 | if (!qemu_cpu_is_self(cpu)) { |
c08d7424 | 910 | qemu_cpu_kick(cpu); |
aa7f74d1 JK |
911 | } |
912 | } | |
913 | ||
3889c3fa | 914 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
915 | { |
916 | struct kvm_irq_level event; | |
917 | int ret; | |
918 | ||
7ae26bd4 | 919 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
920 | |
921 | event.level = level; | |
922 | event.irq = irq; | |
e333cd69 | 923 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 924 | if (ret < 0) { |
3889c3fa | 925 | perror("kvm_set_irq"); |
84b058d7 JK |
926 | abort(); |
927 | } | |
928 | ||
e333cd69 | 929 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
930 | } |
931 | ||
932 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
933 | typedef struct KVMMSIRoute { |
934 | struct kvm_irq_routing_entry kroute; | |
935 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
936 | } KVMMSIRoute; | |
937 | ||
84b058d7 JK |
938 | static void set_gsi(KVMState *s, unsigned int gsi) |
939 | { | |
84b058d7 JK |
940 | s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); |
941 | } | |
942 | ||
04fa27f5 JK |
943 | static void clear_gsi(KVMState *s, unsigned int gsi) |
944 | { | |
945 | s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32)); | |
946 | } | |
947 | ||
7b774593 | 948 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 949 | { |
04fa27f5 | 950 | int gsi_count, i; |
84b058d7 | 951 | |
00008418 | 952 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 JK |
953 | if (gsi_count > 0) { |
954 | unsigned int gsi_bits, i; | |
955 | ||
956 | /* Round up so we can search ints using ffs */ | |
bc8c6788 | 957 | gsi_bits = ALIGN(gsi_count, 32); |
84b058d7 | 958 | s->used_gsi_bitmap = g_malloc0(gsi_bits / 8); |
4e2e4e63 | 959 | s->gsi_count = gsi_count; |
84b058d7 JK |
960 | |
961 | /* Mark any over-allocated bits as already in use */ | |
962 | for (i = gsi_count; i < gsi_bits; i++) { | |
963 | set_gsi(s, i); | |
964 | } | |
965 | } | |
966 | ||
967 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
968 | s->nr_allocated_irq_routes = 0; | |
969 | ||
4a3adebb JK |
970 | if (!s->direct_msi) { |
971 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { | |
972 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
973 | } | |
04fa27f5 JK |
974 | } |
975 | ||
84b058d7 JK |
976 | kvm_arch_init_irq_routing(s); |
977 | } | |
978 | ||
cb925cf9 | 979 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
980 | { |
981 | int ret; | |
982 | ||
983 | s->irq_routes->flags = 0; | |
984 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); | |
985 | assert(ret == 0); | |
986 | } | |
987 | ||
84b058d7 JK |
988 | static void kvm_add_routing_entry(KVMState *s, |
989 | struct kvm_irq_routing_entry *entry) | |
990 | { | |
991 | struct kvm_irq_routing_entry *new; | |
992 | int n, size; | |
993 | ||
994 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
995 | n = s->nr_allocated_irq_routes * 2; | |
996 | if (n < 64) { | |
997 | n = 64; | |
998 | } | |
999 | size = sizeof(struct kvm_irq_routing); | |
1000 | size += n * sizeof(*new); | |
1001 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1002 | s->nr_allocated_irq_routes = n; | |
1003 | } | |
1004 | n = s->irq_routes->nr++; | |
1005 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1006 | |
1007 | *new = *entry; | |
84b058d7 JK |
1008 | |
1009 | set_gsi(s, entry->gsi); | |
1010 | } | |
1011 | ||
cc57407e JK |
1012 | static int kvm_update_routing_entry(KVMState *s, |
1013 | struct kvm_irq_routing_entry *new_entry) | |
1014 | { | |
1015 | struct kvm_irq_routing_entry *entry; | |
1016 | int n; | |
1017 | ||
1018 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1019 | entry = &s->irq_routes->entries[n]; | |
1020 | if (entry->gsi != new_entry->gsi) { | |
1021 | continue; | |
1022 | } | |
1023 | ||
40509f7f MT |
1024 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1025 | return 0; | |
1026 | } | |
1027 | ||
0fbc2074 | 1028 | *entry = *new_entry; |
cc57407e JK |
1029 | |
1030 | kvm_irqchip_commit_routes(s); | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | return -ESRCH; | |
1036 | } | |
1037 | ||
1df186df | 1038 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1039 | { |
0fbc2074 | 1040 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1041 | |
4e2e4e63 JK |
1042 | assert(pin < s->gsi_count); |
1043 | ||
84b058d7 JK |
1044 | e.gsi = irq; |
1045 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1046 | e.flags = 0; | |
1047 | e.u.irqchip.irqchip = irqchip; | |
1048 | e.u.irqchip.pin = pin; | |
1049 | kvm_add_routing_entry(s, &e); | |
1050 | } | |
1051 | ||
1e2aa8be | 1052 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1053 | { |
1054 | struct kvm_irq_routing_entry *e; | |
1055 | int i; | |
1056 | ||
76fe21de AK |
1057 | if (kvm_gsi_direct_mapping()) { |
1058 | return; | |
1059 | } | |
1060 | ||
04fa27f5 JK |
1061 | for (i = 0; i < s->irq_routes->nr; i++) { |
1062 | e = &s->irq_routes->entries[i]; | |
1063 | if (e->gsi == virq) { | |
1064 | s->irq_routes->nr--; | |
1065 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1066 | } | |
1067 | } | |
1068 | clear_gsi(s, virq); | |
1069 | } | |
1070 | ||
1071 | static unsigned int kvm_hash_msi(uint32_t data) | |
1072 | { | |
1073 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1074 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1075 | return data & 0xff; | |
1076 | } | |
1077 | ||
1078 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1079 | { | |
1080 | KVMMSIRoute *route, *next; | |
1081 | unsigned int hash; | |
1082 | ||
1083 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1084 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1085 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1086 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1087 | g_free(route); | |
1088 | } | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | static int kvm_irqchip_get_virq(KVMState *s) | |
1093 | { | |
1094 | uint32_t *word = s->used_gsi_bitmap; | |
1095 | int max_words = ALIGN(s->gsi_count, 32) / 32; | |
1096 | int i, bit; | |
1097 | bool retry = true; | |
1098 | ||
1099 | again: | |
1100 | /* Return the lowest unused GSI in the bitmap */ | |
1101 | for (i = 0; i < max_words; i++) { | |
1102 | bit = ffs(~word[i]); | |
1103 | if (!bit) { | |
1104 | continue; | |
1105 | } | |
1106 | ||
1107 | return bit - 1 + i * 32; | |
1108 | } | |
4a3adebb | 1109 | if (!s->direct_msi && retry) { |
04fa27f5 JK |
1110 | retry = false; |
1111 | kvm_flush_dynamic_msi_routes(s); | |
1112 | goto again; | |
1113 | } | |
1114 | return -ENOSPC; | |
1115 | ||
1116 | } | |
1117 | ||
1118 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1119 | { | |
1120 | unsigned int hash = kvm_hash_msi(msg.data); | |
1121 | KVMMSIRoute *route; | |
1122 | ||
1123 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1124 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1125 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1126 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1127 | return route; |
1128 | } | |
1129 | } | |
1130 | return NULL; | |
1131 | } | |
1132 | ||
1133 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1134 | { | |
4a3adebb | 1135 | struct kvm_msi msi; |
04fa27f5 JK |
1136 | KVMMSIRoute *route; |
1137 | ||
4a3adebb JK |
1138 | if (s->direct_msi) { |
1139 | msi.address_lo = (uint32_t)msg.address; | |
1140 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1141 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1142 | msi.flags = 0; |
1143 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1144 | ||
1145 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1146 | } | |
1147 | ||
04fa27f5 JK |
1148 | route = kvm_lookup_msi_route(s, msg); |
1149 | if (!route) { | |
e7b20308 | 1150 | int virq; |
04fa27f5 JK |
1151 | |
1152 | virq = kvm_irqchip_get_virq(s); | |
1153 | if (virq < 0) { | |
1154 | return virq; | |
1155 | } | |
1156 | ||
0fbc2074 | 1157 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1158 | route->kroute.gsi = virq; |
1159 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1160 | route->kroute.flags = 0; | |
1161 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1162 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1163 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1164 | |
1165 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1166 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1167 | |
1168 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1169 | entry); | |
04fa27f5 JK |
1170 | } |
1171 | ||
1172 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1173 | ||
3889c3fa | 1174 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1175 | } |
1176 | ||
92b4e489 JK |
1177 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) |
1178 | { | |
0fbc2074 | 1179 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 JK |
1180 | int virq; |
1181 | ||
76fe21de AK |
1182 | if (kvm_gsi_direct_mapping()) { |
1183 | return msg.data & 0xffff; | |
1184 | } | |
1185 | ||
f3e1bed8 | 1186 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1187 | return -ENOSYS; |
1188 | } | |
1189 | ||
1190 | virq = kvm_irqchip_get_virq(s); | |
1191 | if (virq < 0) { | |
1192 | return virq; | |
1193 | } | |
1194 | ||
1195 | kroute.gsi = virq; | |
1196 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1197 | kroute.flags = 0; | |
1198 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1199 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1200 | kroute.u.msi.data = le32_to_cpu(msg.data); |
92b4e489 JK |
1201 | |
1202 | kvm_add_routing_entry(s, &kroute); | |
cb925cf9 | 1203 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1204 | |
1205 | return virq; | |
1206 | } | |
1207 | ||
cc57407e JK |
1208 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) |
1209 | { | |
0fbc2074 | 1210 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 1211 | |
76fe21de AK |
1212 | if (kvm_gsi_direct_mapping()) { |
1213 | return 0; | |
1214 | } | |
1215 | ||
cc57407e JK |
1216 | if (!kvm_irqchip_in_kernel()) { |
1217 | return -ENOSYS; | |
1218 | } | |
1219 | ||
1220 | kroute.gsi = virq; | |
1221 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1222 | kroute.flags = 0; | |
1223 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1224 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1225 | kroute.u.msi.data = le32_to_cpu(msg.data); |
cc57407e JK |
1226 | |
1227 | return kvm_update_routing_entry(s, &kroute); | |
1228 | } | |
1229 | ||
ca916d37 VM |
1230 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, |
1231 | bool assign) | |
39853bbc JK |
1232 | { |
1233 | struct kvm_irqfd irqfd = { | |
1234 | .fd = fd, | |
1235 | .gsi = virq, | |
1236 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1237 | }; | |
1238 | ||
ca916d37 VM |
1239 | if (rfd != -1) { |
1240 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1241 | irqfd.resamplefd = rfd; | |
1242 | } | |
1243 | ||
cc7e0ddf | 1244 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1245 | return -ENOSYS; |
1246 | } | |
1247 | ||
1248 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1249 | } | |
1250 | ||
d426d9fb CH |
1251 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1252 | { | |
1253 | struct kvm_irq_routing_entry kroute; | |
1254 | int virq; | |
1255 | ||
1256 | if (!kvm_gsi_routing_enabled()) { | |
1257 | return -ENOSYS; | |
1258 | } | |
1259 | ||
1260 | virq = kvm_irqchip_get_virq(s); | |
1261 | if (virq < 0) { | |
1262 | return virq; | |
1263 | } | |
1264 | ||
1265 | kroute.gsi = virq; | |
1266 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1267 | kroute.flags = 0; | |
1268 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1269 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1270 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1271 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1272 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1273 | ||
1274 | kvm_add_routing_entry(s, &kroute); | |
1275 | kvm_irqchip_commit_routes(s); | |
1276 | ||
1277 | return virq; | |
1278 | } | |
1279 | ||
84b058d7 JK |
1280 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1281 | ||
7b774593 | 1282 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
1283 | { |
1284 | } | |
04fa27f5 | 1285 | |
d3d3bef0 JK |
1286 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1287 | { | |
1288 | } | |
1289 | ||
04fa27f5 JK |
1290 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1291 | { | |
1292 | abort(); | |
1293 | } | |
92b4e489 JK |
1294 | |
1295 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) | |
1296 | { | |
df410675 | 1297 | return -ENOSYS; |
92b4e489 | 1298 | } |
39853bbc | 1299 | |
d426d9fb CH |
1300 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1301 | { | |
1302 | return -ENOSYS; | |
1303 | } | |
1304 | ||
39853bbc JK |
1305 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) |
1306 | { | |
1307 | abort(); | |
1308 | } | |
dabe3143 MT |
1309 | |
1310 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1311 | { | |
1312 | return -ENOSYS; | |
1313 | } | |
84b058d7 JK |
1314 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1315 | ||
ca916d37 VM |
1316 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
1317 | EventNotifier *rn, int virq) | |
39853bbc | 1318 | { |
ca916d37 VM |
1319 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), |
1320 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
39853bbc JK |
1321 | } |
1322 | ||
b131c74a | 1323 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq) |
15b2bd18 | 1324 | { |
ca916d37 VM |
1325 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, |
1326 | false); | |
15b2bd18 PB |
1327 | } |
1328 | ||
84b058d7 JK |
1329 | static int kvm_irqchip_create(KVMState *s) |
1330 | { | |
84b058d7 JK |
1331 | int ret; |
1332 | ||
36ad0e94 | 1333 | if (!qemu_opt_get_bool(qemu_get_machine_opts(), "kernel_irqchip", true) || |
d426d9fb CH |
1334 | (!kvm_check_extension(s, KVM_CAP_IRQCHIP) && |
1335 | (kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0) < 0))) { | |
84b058d7 JK |
1336 | return 0; |
1337 | } | |
1338 | ||
d6032e06 CD |
1339 | /* First probe and see if there's a arch-specific hook to create the |
1340 | * in-kernel irqchip for us */ | |
1341 | ret = kvm_arch_irqchip_create(s); | |
84b058d7 | 1342 | if (ret < 0) { |
84b058d7 | 1343 | return ret; |
d6032e06 CD |
1344 | } else if (ret == 0) { |
1345 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1346 | if (ret < 0) { | |
1347 | fprintf(stderr, "Create kernel irqchip failed\n"); | |
1348 | return ret; | |
1349 | } | |
84b058d7 JK |
1350 | } |
1351 | ||
3d4b2649 | 1352 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1353 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1354 | * interrupt delivery (though the reverse is not necessarily true) | |
1355 | */ | |
1356 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 1357 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
1358 | |
1359 | kvm_init_irq_routing(s); | |
1360 | ||
1361 | return 0; | |
1362 | } | |
1363 | ||
670436ce AJ |
1364 | /* Find number of supported CPUs using the recommended |
1365 | * procedure from the kernel API documentation to cope with | |
1366 | * older kernels that may be missing capabilities. | |
1367 | */ | |
1368 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 1369 | { |
670436ce AJ |
1370 | int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); |
1371 | return (ret) ? ret : 4; | |
1372 | } | |
3ed444e9 | 1373 | |
670436ce AJ |
1374 | static int kvm_max_vcpus(KVMState *s) |
1375 | { | |
1376 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1377 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
1378 | } |
1379 | ||
f1e29879 | 1380 | int kvm_init(MachineClass *mc) |
05330448 | 1381 | { |
168ccc11 JK |
1382 | static const char upgrade_note[] = |
1383 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1384 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
1385 | struct { |
1386 | const char *name; | |
1387 | int num; | |
1388 | } num_cpus[] = { | |
1389 | { "SMP", smp_cpus }, | |
1390 | { "hotpluggable", max_cpus }, | |
1391 | { NULL, } | |
1392 | }, *nc = num_cpus; | |
1393 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 1394 | KVMState *s; |
94a8d39a | 1395 | const KVMCapabilityInfo *missing_cap; |
05330448 | 1396 | int ret; |
135a129a AK |
1397 | int i, type = 0; |
1398 | const char *kvm_type; | |
05330448 | 1399 | |
7267c094 | 1400 | s = g_malloc0(sizeof(KVMState)); |
05330448 | 1401 | |
3145fcb6 DG |
1402 | /* |
1403 | * On systems where the kernel can support different base page | |
1404 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1405 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1406 | * page size for the system though. | |
1407 | */ | |
1408 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
47c16ed5 | 1409 | page_size_init(); |
3145fcb6 | 1410 | |
aed6efb9 JH |
1411 | s->sigmask_len = 8; |
1412 | ||
e22a25c9 | 1413 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 1414 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 1415 | #endif |
05330448 | 1416 | s->vmfd = -1; |
40ff6d7e | 1417 | s->fd = qemu_open("/dev/kvm", O_RDWR); |
05330448 AL |
1418 | if (s->fd == -1) { |
1419 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1420 | ret = -errno; | |
1421 | goto err; | |
1422 | } | |
1423 | ||
1424 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1425 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 1426 | if (ret >= 0) { |
05330448 | 1427 | ret = -EINVAL; |
a426e122 | 1428 | } |
05330448 AL |
1429 | fprintf(stderr, "kvm version too old\n"); |
1430 | goto err; | |
1431 | } | |
1432 | ||
1433 | if (ret > KVM_API_VERSION) { | |
1434 | ret = -EINVAL; | |
1435 | fprintf(stderr, "kvm version not supported\n"); | |
1436 | goto err; | |
1437 | } | |
1438 | ||
fb541ca5 AW |
1439 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
1440 | ||
1441 | /* If unspecified, use the default value */ | |
1442 | if (!s->nr_slots) { | |
1443 | s->nr_slots = 32; | |
1444 | } | |
1445 | ||
1446 | s->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
1447 | ||
1448 | for (i = 0; i < s->nr_slots; i++) { | |
1449 | s->slots[i].slot = i; | |
1450 | } | |
1451 | ||
670436ce AJ |
1452 | /* check the vcpu limits */ |
1453 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
1454 | hard_vcpus_limit = kvm_max_vcpus(s); | |
3ed444e9 | 1455 | |
670436ce AJ |
1456 | while (nc->name) { |
1457 | if (nc->num > soft_vcpus_limit) { | |
1458 | fprintf(stderr, | |
1459 | "Warning: Number of %s cpus requested (%d) exceeds " | |
1460 | "the recommended cpus supported by KVM (%d)\n", | |
1461 | nc->name, nc->num, soft_vcpus_limit); | |
1462 | ||
1463 | if (nc->num > hard_vcpus_limit) { | |
670436ce AJ |
1464 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " |
1465 | "the maximum cpus supported by KVM (%d)\n", | |
1466 | nc->name, nc->num, hard_vcpus_limit); | |
9ba3cf54 | 1467 | exit(1); |
670436ce AJ |
1468 | } |
1469 | } | |
1470 | nc++; | |
7dc52526 MT |
1471 | } |
1472 | ||
135a129a | 1473 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); |
f1e29879 MA |
1474 | if (mc->kvm_type) { |
1475 | type = mc->kvm_type(kvm_type); | |
135a129a | 1476 | } else if (kvm_type) { |
0e1dac6c | 1477 | ret = -EINVAL; |
135a129a AK |
1478 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); |
1479 | goto err; | |
1480 | } | |
1481 | ||
94ccff13 | 1482 | do { |
135a129a | 1483 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
1484 | } while (ret == -EINTR); |
1485 | ||
1486 | if (ret < 0) { | |
521f438e | 1487 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
1488 | strerror(-ret)); |
1489 | ||
0104dcac AG |
1490 | #ifdef TARGET_S390X |
1491 | fprintf(stderr, "Please add the 'switch_amode' kernel parameter to " | |
1492 | "your host kernel command line\n"); | |
1493 | #endif | |
05330448 | 1494 | goto err; |
0104dcac | 1495 | } |
05330448 | 1496 | |
94ccff13 | 1497 | s->vmfd = ret; |
94a8d39a JK |
1498 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
1499 | if (!missing_cap) { | |
1500 | missing_cap = | |
1501 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 1502 | } |
94a8d39a | 1503 | if (missing_cap) { |
ad7b8b33 | 1504 | ret = -EINVAL; |
94a8d39a JK |
1505 | fprintf(stderr, "kvm does not support %s\n%s", |
1506 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
1507 | goto err; |
1508 | } | |
1509 | ||
ad7b8b33 | 1510 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
f65ed4c1 | 1511 | |
e69917e2 | 1512 | s->broken_set_mem_region = 1; |
14a09518 | 1513 | ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
e69917e2 JK |
1514 | if (ret > 0) { |
1515 | s->broken_set_mem_region = 0; | |
1516 | } | |
e69917e2 | 1517 | |
a0fb002c JK |
1518 | #ifdef KVM_CAP_VCPU_EVENTS |
1519 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1520 | #endif | |
1521 | ||
b0b1d690 JK |
1522 | s->robust_singlestep = |
1523 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 1524 | |
ff44f1a3 JK |
1525 | #ifdef KVM_CAP_DEBUGREGS |
1526 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1527 | #endif | |
1528 | ||
f1665b21 SY |
1529 | #ifdef KVM_CAP_XSAVE |
1530 | s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); | |
1531 | #endif | |
1532 | ||
f1665b21 SY |
1533 | #ifdef KVM_CAP_XCRS |
1534 | s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); | |
1535 | #endif | |
1536 | ||
8a7c7393 JK |
1537 | #ifdef KVM_CAP_PIT_STATE2 |
1538 | s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2); | |
1539 | #endif | |
1540 | ||
d3d3bef0 | 1541 | #ifdef KVM_CAP_IRQ_ROUTING |
4a3adebb | 1542 | s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 1543 | #endif |
4a3adebb | 1544 | |
3ab73842 JK |
1545 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
1546 | ||
e333cd69 | 1547 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 1548 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 1549 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
1550 | } |
1551 | ||
df9c8b75 JJ |
1552 | #ifdef KVM_CAP_READONLY_MEM |
1553 | kvm_readonly_mem_allowed = | |
1554 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
1555 | #endif | |
1556 | ||
69e03ae6 NN |
1557 | kvm_eventfds_allowed = |
1558 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
1559 | ||
cad1e282 | 1560 | ret = kvm_arch_init(s); |
a426e122 | 1561 | if (ret < 0) { |
05330448 | 1562 | goto err; |
a426e122 | 1563 | } |
05330448 | 1564 | |
84b058d7 JK |
1565 | ret = kvm_irqchip_create(s); |
1566 | if (ret < 0) { | |
1567 | goto err; | |
1568 | } | |
1569 | ||
05330448 | 1570 | kvm_state = s; |
f6790af6 AK |
1571 | memory_listener_register(&kvm_memory_listener, &address_space_memory); |
1572 | memory_listener_register(&kvm_io_listener, &address_space_io); | |
05330448 | 1573 | |
d2f2b8a7 SH |
1574 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
1575 | ||
aa7f74d1 JK |
1576 | cpu_interrupt_handler = kvm_handle_interrupt; |
1577 | ||
05330448 AL |
1578 | return 0; |
1579 | ||
1580 | err: | |
0e1dac6c | 1581 | assert(ret < 0); |
6d1cc321 SW |
1582 | if (s->vmfd >= 0) { |
1583 | close(s->vmfd); | |
1584 | } | |
1585 | if (s->fd != -1) { | |
1586 | close(s->fd); | |
05330448 | 1587 | } |
fb541ca5 | 1588 | g_free(s->slots); |
7267c094 | 1589 | g_free(s); |
05330448 AL |
1590 | |
1591 | return ret; | |
1592 | } | |
1593 | ||
aed6efb9 JH |
1594 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
1595 | { | |
1596 | s->sigmask_len = sigmask_len; | |
1597 | } | |
1598 | ||
b30e93e9 JK |
1599 | static void kvm_handle_io(uint16_t port, void *data, int direction, int size, |
1600 | uint32_t count) | |
05330448 AL |
1601 | { |
1602 | int i; | |
1603 | uint8_t *ptr = data; | |
1604 | ||
1605 | for (i = 0; i < count; i++) { | |
354678c5 JK |
1606 | address_space_rw(&address_space_io, port, ptr, size, |
1607 | direction == KVM_EXIT_IO_OUT); | |
05330448 AL |
1608 | ptr += size; |
1609 | } | |
05330448 AL |
1610 | } |
1611 | ||
5326ab55 | 1612 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 1613 | { |
977c7b6d RK |
1614 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
1615 | run->internal.suberror); | |
1616 | ||
7c80eef8 MT |
1617 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
1618 | int i; | |
1619 | ||
7c80eef8 MT |
1620 | for (i = 0; i < run->internal.ndata; ++i) { |
1621 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1622 | i, (uint64_t)run->internal.data[i]); | |
1623 | } | |
1624 | } | |
7c80eef8 MT |
1625 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
1626 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 1627 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
878096ee | 1628 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); |
d73cd8f4 | 1629 | return EXCP_INTERRUPT; |
a426e122 | 1630 | } |
7c80eef8 MT |
1631 | } |
1632 | /* FIXME: Should trigger a qmp message to let management know | |
1633 | * something went wrong. | |
1634 | */ | |
73aaec4a | 1635 | return -1; |
7c80eef8 | 1636 | } |
7c80eef8 | 1637 | |
62a2744c | 1638 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 1639 | { |
f65ed4c1 | 1640 | KVMState *s = kvm_state; |
1cae88b9 AK |
1641 | |
1642 | if (s->coalesced_flush_in_progress) { | |
1643 | return; | |
1644 | } | |
1645 | ||
1646 | s->coalesced_flush_in_progress = true; | |
1647 | ||
62a2744c SY |
1648 | if (s->coalesced_mmio_ring) { |
1649 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
1650 | while (ring->first != ring->last) { |
1651 | struct kvm_coalesced_mmio *ent; | |
1652 | ||
1653 | ent = &ring->coalesced_mmio[ring->first]; | |
1654 | ||
1655 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
85199474 | 1656 | smp_wmb(); |
f65ed4c1 AL |
1657 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
1658 | } | |
1659 | } | |
1cae88b9 AK |
1660 | |
1661 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
1662 | } |
1663 | ||
20d695a9 | 1664 | static void do_kvm_cpu_synchronize_state(void *arg) |
4c0960c0 | 1665 | { |
20d695a9 | 1666 | CPUState *cpu = arg; |
2705d56a | 1667 | |
20d695a9 AF |
1668 | if (!cpu->kvm_vcpu_dirty) { |
1669 | kvm_arch_get_registers(cpu); | |
1670 | cpu->kvm_vcpu_dirty = true; | |
4c0960c0 AK |
1671 | } |
1672 | } | |
1673 | ||
dd1750d7 | 1674 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 1675 | { |
20d695a9 AF |
1676 | if (!cpu->kvm_vcpu_dirty) { |
1677 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu); | |
a426e122 | 1678 | } |
2705d56a JK |
1679 | } |
1680 | ||
c8e2085d | 1681 | static void do_kvm_cpu_synchronize_post_reset(void *arg) |
ea375f9a | 1682 | { |
c8e2085d DH |
1683 | CPUState *cpu = arg; |
1684 | ||
20d695a9 AF |
1685 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
1686 | cpu->kvm_vcpu_dirty = false; | |
ea375f9a JK |
1687 | } |
1688 | ||
c8e2085d DH |
1689 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
1690 | { | |
1691 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, cpu); | |
1692 | } | |
1693 | ||
1694 | static void do_kvm_cpu_synchronize_post_init(void *arg) | |
ea375f9a | 1695 | { |
c8e2085d DH |
1696 | CPUState *cpu = arg; |
1697 | ||
20d695a9 AF |
1698 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
1699 | cpu->kvm_vcpu_dirty = false; | |
ea375f9a JK |
1700 | } |
1701 | ||
c8e2085d DH |
1702 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
1703 | { | |
1704 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, cpu); | |
1705 | } | |
1706 | ||
de9d61e8 MT |
1707 | void kvm_cpu_clean_state(CPUState *cpu) |
1708 | { | |
1709 | cpu->kvm_vcpu_dirty = false; | |
1710 | } | |
1711 | ||
1458c363 | 1712 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 1713 | { |
f7575c96 | 1714 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 1715 | int ret, run_ret; |
05330448 | 1716 | |
8c0d577e | 1717 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 1718 | |
20d695a9 | 1719 | if (kvm_arch_process_async_events(cpu)) { |
fcd7d003 | 1720 | cpu->exit_request = 0; |
6792a57b | 1721 | return EXCP_HLT; |
9ccfac9e | 1722 | } |
0af691d7 | 1723 | |
9ccfac9e | 1724 | do { |
20d695a9 AF |
1725 | if (cpu->kvm_vcpu_dirty) { |
1726 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); | |
1727 | cpu->kvm_vcpu_dirty = false; | |
4c0960c0 AK |
1728 | } |
1729 | ||
20d695a9 | 1730 | kvm_arch_pre_run(cpu, run); |
fcd7d003 | 1731 | if (cpu->exit_request) { |
9ccfac9e JK |
1732 | DPRINTF("interrupt exit requested\n"); |
1733 | /* | |
1734 | * KVM requires us to reenter the kernel after IO exits to complete | |
1735 | * instruction emulation. This self-signal will ensure that we | |
1736 | * leave ASAP again. | |
1737 | */ | |
1738 | qemu_cpu_kick_self(); | |
1739 | } | |
d549db5a | 1740 | qemu_mutex_unlock_iothread(); |
9ccfac9e | 1741 | |
1bc22652 | 1742 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 1743 | |
d549db5a | 1744 | qemu_mutex_lock_iothread(); |
20d695a9 | 1745 | kvm_arch_post_run(cpu, run); |
05330448 | 1746 | |
7cbb533f | 1747 | if (run_ret < 0) { |
dc77d341 JK |
1748 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
1749 | DPRINTF("io window exit\n"); | |
d73cd8f4 | 1750 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
1751 | break; |
1752 | } | |
7b011fbc ME |
1753 | fprintf(stderr, "error: kvm run failed %s\n", |
1754 | strerror(-run_ret)); | |
a85e130e PB |
1755 | ret = -1; |
1756 | break; | |
05330448 AL |
1757 | } |
1758 | ||
b76ac80a | 1759 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
1760 | switch (run->exit_reason) { |
1761 | case KVM_EXIT_IO: | |
8c0d577e | 1762 | DPRINTF("handle_io\n"); |
b30e93e9 JK |
1763 | kvm_handle_io(run->io.port, |
1764 | (uint8_t *)run + run->io.data_offset, | |
1765 | run->io.direction, | |
1766 | run->io.size, | |
1767 | run->io.count); | |
d73cd8f4 | 1768 | ret = 0; |
05330448 AL |
1769 | break; |
1770 | case KVM_EXIT_MMIO: | |
8c0d577e | 1771 | DPRINTF("handle_mmio\n"); |
05330448 AL |
1772 | cpu_physical_memory_rw(run->mmio.phys_addr, |
1773 | run->mmio.data, | |
1774 | run->mmio.len, | |
1775 | run->mmio.is_write); | |
d73cd8f4 | 1776 | ret = 0; |
05330448 AL |
1777 | break; |
1778 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 1779 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 1780 | ret = EXCP_INTERRUPT; |
05330448 AL |
1781 | break; |
1782 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 1783 | DPRINTF("shutdown\n"); |
05330448 | 1784 | qemu_system_reset_request(); |
d73cd8f4 | 1785 | ret = EXCP_INTERRUPT; |
05330448 AL |
1786 | break; |
1787 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
1788 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
1789 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 1790 | ret = -1; |
05330448 | 1791 | break; |
7c80eef8 | 1792 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 1793 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 1794 | break; |
99040447 PS |
1795 | case KVM_EXIT_SYSTEM_EVENT: |
1796 | switch (run->system_event.type) { | |
1797 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
1798 | qemu_system_shutdown_request(); | |
1799 | ret = EXCP_INTERRUPT; | |
1800 | break; | |
1801 | case KVM_SYSTEM_EVENT_RESET: | |
1802 | qemu_system_reset_request(); | |
1803 | ret = EXCP_INTERRUPT; | |
1804 | break; | |
1805 | default: | |
1806 | DPRINTF("kvm_arch_handle_exit\n"); | |
1807 | ret = kvm_arch_handle_exit(cpu, run); | |
1808 | break; | |
1809 | } | |
1810 | break; | |
05330448 | 1811 | default: |
8c0d577e | 1812 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 1813 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
1814 | break; |
1815 | } | |
d73cd8f4 | 1816 | } while (ret == 0); |
05330448 | 1817 | |
73aaec4a | 1818 | if (ret < 0) { |
878096ee | 1819 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); |
0461d5a6 | 1820 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
1821 | } |
1822 | ||
fcd7d003 | 1823 | cpu->exit_request = 0; |
05330448 AL |
1824 | return ret; |
1825 | } | |
1826 | ||
984b5181 | 1827 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
1828 | { |
1829 | int ret; | |
984b5181 AL |
1830 | void *arg; |
1831 | va_list ap; | |
05330448 | 1832 | |
984b5181 AL |
1833 | va_start(ap, type); |
1834 | arg = va_arg(ap, void *); | |
1835 | va_end(ap); | |
1836 | ||
9c775729 | 1837 | trace_kvm_ioctl(type, arg); |
984b5181 | 1838 | ret = ioctl(s->fd, type, arg); |
a426e122 | 1839 | if (ret == -1) { |
05330448 | 1840 | ret = -errno; |
a426e122 | 1841 | } |
05330448 AL |
1842 | return ret; |
1843 | } | |
1844 | ||
984b5181 | 1845 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
1846 | { |
1847 | int ret; | |
984b5181 AL |
1848 | void *arg; |
1849 | va_list ap; | |
1850 | ||
1851 | va_start(ap, type); | |
1852 | arg = va_arg(ap, void *); | |
1853 | va_end(ap); | |
05330448 | 1854 | |
9c775729 | 1855 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 1856 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 1857 | if (ret == -1) { |
05330448 | 1858 | ret = -errno; |
a426e122 | 1859 | } |
05330448 AL |
1860 | return ret; |
1861 | } | |
1862 | ||
1bc22652 | 1863 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
1864 | { |
1865 | int ret; | |
984b5181 AL |
1866 | void *arg; |
1867 | va_list ap; | |
1868 | ||
1869 | va_start(ap, type); | |
1870 | arg = va_arg(ap, void *); | |
1871 | va_end(ap); | |
05330448 | 1872 | |
9c775729 | 1873 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 1874 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 1875 | if (ret == -1) { |
05330448 | 1876 | ret = -errno; |
a426e122 | 1877 | } |
05330448 AL |
1878 | return ret; |
1879 | } | |
bd322087 | 1880 | |
0a6a7cca CD |
1881 | int kvm_device_ioctl(int fd, int type, ...) |
1882 | { | |
1883 | int ret; | |
1884 | void *arg; | |
1885 | va_list ap; | |
1886 | ||
1887 | va_start(ap, type); | |
1888 | arg = va_arg(ap, void *); | |
1889 | va_end(ap); | |
1890 | ||
1891 | trace_kvm_device_ioctl(fd, type, arg); | |
1892 | ret = ioctl(fd, type, arg); | |
1893 | if (ret == -1) { | |
1894 | ret = -errno; | |
1895 | } | |
1896 | return ret; | |
1897 | } | |
1898 | ||
bd322087 AL |
1899 | int kvm_has_sync_mmu(void) |
1900 | { | |
94a8d39a | 1901 | return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
bd322087 | 1902 | } |
e22a25c9 | 1903 | |
a0fb002c JK |
1904 | int kvm_has_vcpu_events(void) |
1905 | { | |
1906 | return kvm_state->vcpu_events; | |
1907 | } | |
1908 | ||
b0b1d690 JK |
1909 | int kvm_has_robust_singlestep(void) |
1910 | { | |
1911 | return kvm_state->robust_singlestep; | |
1912 | } | |
1913 | ||
ff44f1a3 JK |
1914 | int kvm_has_debugregs(void) |
1915 | { | |
1916 | return kvm_state->debugregs; | |
1917 | } | |
1918 | ||
f1665b21 SY |
1919 | int kvm_has_xsave(void) |
1920 | { | |
1921 | return kvm_state->xsave; | |
1922 | } | |
1923 | ||
1924 | int kvm_has_xcrs(void) | |
1925 | { | |
1926 | return kvm_state->xcrs; | |
1927 | } | |
1928 | ||
8a7c7393 JK |
1929 | int kvm_has_pit_state2(void) |
1930 | { | |
1931 | return kvm_state->pit_state2; | |
1932 | } | |
1933 | ||
d2f2b8a7 SH |
1934 | int kvm_has_many_ioeventfds(void) |
1935 | { | |
1936 | if (!kvm_enabled()) { | |
1937 | return 0; | |
1938 | } | |
1939 | return kvm_state->many_ioeventfds; | |
1940 | } | |
1941 | ||
84b058d7 JK |
1942 | int kvm_has_gsi_routing(void) |
1943 | { | |
a9c5eb0d | 1944 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 1945 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
1946 | #else |
1947 | return false; | |
1948 | #endif | |
84b058d7 JK |
1949 | } |
1950 | ||
3ab73842 JK |
1951 | int kvm_has_intx_set_mask(void) |
1952 | { | |
1953 | return kvm_state->intx_set_mask; | |
1954 | } | |
1955 | ||
6f0437e8 JK |
1956 | void kvm_setup_guest_memory(void *start, size_t size) |
1957 | { | |
1958 | if (!kvm_has_sync_mmu()) { | |
e78815a5 | 1959 | int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK); |
6f0437e8 JK |
1960 | |
1961 | if (ret) { | |
e78815a5 AF |
1962 | perror("qemu_madvise"); |
1963 | fprintf(stderr, | |
1964 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
6f0437e8 JK |
1965 | exit(1); |
1966 | } | |
6f0437e8 JK |
1967 | } |
1968 | } | |
1969 | ||
e22a25c9 | 1970 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 1971 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
1972 | target_ulong pc) |
1973 | { | |
1974 | struct kvm_sw_breakpoint *bp; | |
1975 | ||
a60f24b5 | 1976 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 1977 | if (bp->pc == pc) { |
e22a25c9 | 1978 | return bp; |
a426e122 | 1979 | } |
e22a25c9 AL |
1980 | } |
1981 | return NULL; | |
1982 | } | |
1983 | ||
a60f24b5 | 1984 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 1985 | { |
a60f24b5 | 1986 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
1987 | } |
1988 | ||
452e4751 GC |
1989 | struct kvm_set_guest_debug_data { |
1990 | struct kvm_guest_debug dbg; | |
a60f24b5 | 1991 | CPUState *cpu; |
452e4751 GC |
1992 | int err; |
1993 | }; | |
1994 | ||
1995 | static void kvm_invoke_set_guest_debug(void *data) | |
1996 | { | |
1997 | struct kvm_set_guest_debug_data *dbg_data = data; | |
b3807725 | 1998 | |
a60f24b5 AF |
1999 | dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG, |
2000 | &dbg_data->dbg); | |
452e4751 GC |
2001 | } |
2002 | ||
38e478ec | 2003 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 2004 | { |
452e4751 | 2005 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 2006 | |
b0b1d690 | 2007 | data.dbg.control = reinject_trap; |
e22a25c9 | 2008 | |
ed2803da | 2009 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
2010 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
2011 | } | |
20d695a9 | 2012 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
a60f24b5 | 2013 | data.cpu = cpu; |
e22a25c9 | 2014 | |
f100f0b3 | 2015 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data); |
452e4751 | 2016 | return data.err; |
e22a25c9 AL |
2017 | } |
2018 | ||
62278814 | 2019 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2020 | target_ulong len, int type) |
2021 | { | |
2022 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2023 | int err; |
2024 | ||
2025 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2026 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
2027 | if (bp) { |
2028 | bp->use_count++; | |
2029 | return 0; | |
2030 | } | |
2031 | ||
7267c094 | 2032 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
a426e122 | 2033 | if (!bp) { |
e22a25c9 | 2034 | return -ENOMEM; |
a426e122 | 2035 | } |
e22a25c9 AL |
2036 | |
2037 | bp->pc = addr; | |
2038 | bp->use_count = 1; | |
80b7cd73 | 2039 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 2040 | if (err) { |
7267c094 | 2041 | g_free(bp); |
e22a25c9 AL |
2042 | return err; |
2043 | } | |
2044 | ||
80b7cd73 | 2045 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
2046 | } else { |
2047 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 2048 | if (err) { |
e22a25c9 | 2049 | return err; |
a426e122 | 2050 | } |
e22a25c9 AL |
2051 | } |
2052 | ||
bdc44640 | 2053 | CPU_FOREACH(cpu) { |
38e478ec | 2054 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2055 | if (err) { |
e22a25c9 | 2056 | return err; |
a426e122 | 2057 | } |
e22a25c9 AL |
2058 | } |
2059 | return 0; | |
2060 | } | |
2061 | ||
62278814 | 2062 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2063 | target_ulong len, int type) |
2064 | { | |
2065 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2066 | int err; |
2067 | ||
2068 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2069 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 2070 | if (!bp) { |
e22a25c9 | 2071 | return -ENOENT; |
a426e122 | 2072 | } |
e22a25c9 AL |
2073 | |
2074 | if (bp->use_count > 1) { | |
2075 | bp->use_count--; | |
2076 | return 0; | |
2077 | } | |
2078 | ||
80b7cd73 | 2079 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 2080 | if (err) { |
e22a25c9 | 2081 | return err; |
a426e122 | 2082 | } |
e22a25c9 | 2083 | |
80b7cd73 | 2084 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 2085 | g_free(bp); |
e22a25c9 AL |
2086 | } else { |
2087 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 2088 | if (err) { |
e22a25c9 | 2089 | return err; |
a426e122 | 2090 | } |
e22a25c9 AL |
2091 | } |
2092 | ||
bdc44640 | 2093 | CPU_FOREACH(cpu) { |
38e478ec | 2094 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2095 | if (err) { |
e22a25c9 | 2096 | return err; |
a426e122 | 2097 | } |
e22a25c9 AL |
2098 | } |
2099 | return 0; | |
2100 | } | |
2101 | ||
1d5791f4 | 2102 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2103 | { |
2104 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 2105 | KVMState *s = cpu->kvm_state; |
dc54e252 | 2106 | CPUState *tmpcpu; |
e22a25c9 | 2107 | |
72cf2d4f | 2108 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 2109 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 2110 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
2111 | CPU_FOREACH(tmpcpu) { |
2112 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 2113 | break; |
a426e122 | 2114 | } |
e22a25c9 AL |
2115 | } |
2116 | } | |
78021d6d JK |
2117 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
2118 | g_free(bp); | |
e22a25c9 AL |
2119 | } |
2120 | kvm_arch_remove_all_hw_breakpoints(); | |
2121 | ||
bdc44640 | 2122 | CPU_FOREACH(cpu) { |
38e478ec | 2123 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 2124 | } |
e22a25c9 AL |
2125 | } |
2126 | ||
2127 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2128 | ||
38e478ec | 2129 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
2130 | { |
2131 | return -EINVAL; | |
2132 | } | |
2133 | ||
62278814 | 2134 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2135 | target_ulong len, int type) |
2136 | { | |
2137 | return -EINVAL; | |
2138 | } | |
2139 | ||
62278814 | 2140 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2141 | target_ulong len, int type) |
2142 | { | |
2143 | return -EINVAL; | |
2144 | } | |
2145 | ||
1d5791f4 | 2146 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2147 | { |
2148 | } | |
2149 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 2150 | |
491d6e80 | 2151 | int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 2152 | { |
aed6efb9 | 2153 | KVMState *s = kvm_state; |
cc84de95 MT |
2154 | struct kvm_signal_mask *sigmask; |
2155 | int r; | |
2156 | ||
a426e122 | 2157 | if (!sigset) { |
1bc22652 | 2158 | return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL); |
a426e122 | 2159 | } |
cc84de95 | 2160 | |
7267c094 | 2161 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 2162 | |
aed6efb9 | 2163 | sigmask->len = s->sigmask_len; |
cc84de95 | 2164 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 2165 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 2166 | g_free(sigmask); |
cc84de95 MT |
2167 | |
2168 | return r; | |
2169 | } | |
290adf38 | 2170 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 2171 | { |
20d695a9 | 2172 | return kvm_arch_on_sigbus_vcpu(cpu, code, addr); |
a1b87fe0 JK |
2173 | } |
2174 | ||
2175 | int kvm_on_sigbus(int code, void *addr) | |
2176 | { | |
2177 | return kvm_arch_on_sigbus(code, addr); | |
2178 | } | |
0a6a7cca CD |
2179 | |
2180 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2181 | { | |
2182 | int ret; | |
2183 | struct kvm_create_device create_dev; | |
2184 | ||
2185 | create_dev.type = type; | |
2186 | create_dev.fd = -1; | |
2187 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2188 | ||
2189 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2190 | return -ENOTSUP; | |
2191 | } | |
2192 | ||
2193 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2194 | if (ret) { | |
2195 | return ret; | |
2196 | } | |
2197 | ||
2198 | return test ? 0 : create_dev.fd; | |
2199 | } | |
ada4135f CH |
2200 | |
2201 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) | |
2202 | { | |
2203 | struct kvm_one_reg reg; | |
2204 | int r; | |
2205 | ||
2206 | reg.id = id; | |
2207 | reg.addr = (uintptr_t) source; | |
2208 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2209 | if (r) { | |
2210 | trace_kvm_failed_reg_set(id, strerror(r)); | |
2211 | } | |
2212 | return r; | |
2213 | } | |
2214 | ||
2215 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2216 | { | |
2217 | struct kvm_one_reg reg; | |
2218 | int r; | |
2219 | ||
2220 | reg.id = id; | |
2221 | reg.addr = (uintptr_t) target; | |
2222 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2223 | if (r) { | |
2224 | trace_kvm_failed_reg_get(id, strerror(r)); | |
2225 | } | |
2226 | return r; | |
2227 | } |