root / kvm-all.c @ c18e2f94
History | View | Annotate | Download (32.3 kB)
1 |
/*
|
---|---|
2 |
* QEMU KVM support
|
3 |
*
|
4 |
* Copyright IBM, Corp. 2008
|
5 |
* Red Hat, Inc. 2008
|
6 |
*
|
7 |
* Authors:
|
8 |
* Anthony Liguori <aliguori@us.ibm.com>
|
9 |
* Glauber Costa <gcosta@redhat.com>
|
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> |
19 |
#include <stdarg.h> |
20 |
|
21 |
#include <linux/kvm.h> |
22 |
|
23 |
#include "qemu-common.h" |
24 |
#include "qemu-barrier.h" |
25 |
#include "sysemu.h" |
26 |
#include "hw/hw.h" |
27 |
#include "gdbstub.h" |
28 |
#include "kvm.h" |
29 |
#include "bswap.h" |
30 |
|
31 |
/* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */
|
32 |
#define PAGE_SIZE TARGET_PAGE_SIZE
|
33 |
|
34 |
//#define DEBUG_KVM
|
35 |
|
36 |
#ifdef DEBUG_KVM
|
37 |
#define DPRINTF(fmt, ...) \
|
38 |
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
39 |
#else
|
40 |
#define DPRINTF(fmt, ...) \
|
41 |
do { } while (0) |
42 |
#endif
|
43 |
|
44 |
typedef struct KVMSlot |
45 |
{ |
46 |
target_phys_addr_t start_addr; |
47 |
ram_addr_t memory_size; |
48 |
ram_addr_t phys_offset; |
49 |
int slot;
|
50 |
int flags;
|
51 |
} KVMSlot; |
52 |
|
53 |
typedef struct kvm_dirty_log KVMDirtyLog; |
54 |
|
55 |
struct KVMState
|
56 |
{ |
57 |
KVMSlot slots[32];
|
58 |
int fd;
|
59 |
int vmfd;
|
60 |
int coalesced_mmio;
|
61 |
#ifdef KVM_CAP_COALESCED_MMIO
|
62 |
struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
|
63 |
#endif
|
64 |
int broken_set_mem_region;
|
65 |
int migration_log;
|
66 |
int vcpu_events;
|
67 |
int robust_singlestep;
|
68 |
int debugregs;
|
69 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
70 |
struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
|
71 |
#endif
|
72 |
int irqchip_in_kernel;
|
73 |
int pit_in_kernel;
|
74 |
int xsave, xcrs;
|
75 |
}; |
76 |
|
77 |
static KVMState *kvm_state;
|
78 |
|
79 |
static KVMSlot *kvm_alloc_slot(KVMState *s)
|
80 |
{ |
81 |
int i;
|
82 |
|
83 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
84 |
/* KVM private memory slots */
|
85 |
if (i >= 8 && i < 12) |
86 |
continue;
|
87 |
if (s->slots[i].memory_size == 0) |
88 |
return &s->slots[i];
|
89 |
} |
90 |
|
91 |
fprintf(stderr, "%s: no free slot available\n", __func__);
|
92 |
abort(); |
93 |
} |
94 |
|
95 |
static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
|
96 |
target_phys_addr_t start_addr, |
97 |
target_phys_addr_t end_addr) |
98 |
{ |
99 |
int i;
|
100 |
|
101 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
102 |
KVMSlot *mem = &s->slots[i]; |
103 |
|
104 |
if (start_addr == mem->start_addr &&
|
105 |
end_addr == mem->start_addr + mem->memory_size) { |
106 |
return mem;
|
107 |
} |
108 |
} |
109 |
|
110 |
return NULL; |
111 |
} |
112 |
|
113 |
/*
|
114 |
* Find overlapping slot with lowest start address
|
115 |
*/
|
116 |
static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
|
117 |
target_phys_addr_t start_addr, |
118 |
target_phys_addr_t end_addr) |
119 |
{ |
120 |
KVMSlot *found = NULL;
|
121 |
int i;
|
122 |
|
123 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
124 |
KVMSlot *mem = &s->slots[i]; |
125 |
|
126 |
if (mem->memory_size == 0 || |
127 |
(found && found->start_addr < mem->start_addr)) { |
128 |
continue;
|
129 |
} |
130 |
|
131 |
if (end_addr > mem->start_addr &&
|
132 |
start_addr < mem->start_addr + mem->memory_size) { |
133 |
found = mem; |
134 |
} |
135 |
} |
136 |
|
137 |
return found;
|
138 |
} |
139 |
|
140 |
static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
141 |
{ |
142 |
struct kvm_userspace_memory_region mem;
|
143 |
|
144 |
mem.slot = slot->slot; |
145 |
mem.guest_phys_addr = slot->start_addr; |
146 |
mem.memory_size = slot->memory_size; |
147 |
mem.userspace_addr = (unsigned long)qemu_get_ram_ptr(slot->phys_offset); |
148 |
mem.flags = slot->flags; |
149 |
if (s->migration_log) {
|
150 |
mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; |
151 |
} |
152 |
return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
|
153 |
} |
154 |
|
155 |
static void kvm_reset_vcpu(void *opaque) |
156 |
{ |
157 |
CPUState *env = opaque; |
158 |
|
159 |
kvm_arch_reset_vcpu(env); |
160 |
} |
161 |
|
162 |
int kvm_irqchip_in_kernel(void) |
163 |
{ |
164 |
return kvm_state->irqchip_in_kernel;
|
165 |
} |
166 |
|
167 |
int kvm_pit_in_kernel(void) |
168 |
{ |
169 |
return kvm_state->pit_in_kernel;
|
170 |
} |
171 |
|
172 |
|
173 |
int kvm_init_vcpu(CPUState *env)
|
174 |
{ |
175 |
KVMState *s = kvm_state; |
176 |
long mmap_size;
|
177 |
int ret;
|
178 |
|
179 |
DPRINTF("kvm_init_vcpu\n");
|
180 |
|
181 |
ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
182 |
if (ret < 0) { |
183 |
DPRINTF("kvm_create_vcpu failed\n");
|
184 |
goto err;
|
185 |
} |
186 |
|
187 |
env->kvm_fd = ret; |
188 |
env->kvm_state = s; |
189 |
|
190 |
mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
|
191 |
if (mmap_size < 0) { |
192 |
DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
|
193 |
goto err;
|
194 |
} |
195 |
|
196 |
env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
|
197 |
env->kvm_fd, 0);
|
198 |
if (env->kvm_run == MAP_FAILED) {
|
199 |
ret = -errno; |
200 |
DPRINTF("mmap'ing vcpu state failed\n");
|
201 |
goto err;
|
202 |
} |
203 |
|
204 |
#ifdef KVM_CAP_COALESCED_MMIO
|
205 |
if (s->coalesced_mmio && !s->coalesced_mmio_ring)
|
206 |
s->coalesced_mmio_ring = (void *) env->kvm_run +
|
207 |
s->coalesced_mmio * PAGE_SIZE; |
208 |
#endif
|
209 |
|
210 |
ret = kvm_arch_init_vcpu(env); |
211 |
if (ret == 0) { |
212 |
qemu_register_reset(kvm_reset_vcpu, env); |
213 |
kvm_arch_reset_vcpu(env); |
214 |
} |
215 |
err:
|
216 |
return ret;
|
217 |
} |
218 |
|
219 |
/*
|
220 |
* dirty pages logging control
|
221 |
*/
|
222 |
static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
223 |
ram_addr_t size, int flags, int mask) |
224 |
{ |
225 |
KVMState *s = kvm_state; |
226 |
KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
227 |
int old_flags;
|
228 |
|
229 |
if (mem == NULL) { |
230 |
fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
231 |
TARGET_FMT_plx "\n", __func__, phys_addr,
|
232 |
(target_phys_addr_t)(phys_addr + size - 1));
|
233 |
return -EINVAL;
|
234 |
} |
235 |
|
236 |
old_flags = mem->flags; |
237 |
|
238 |
flags = (mem->flags & ~mask) | flags; |
239 |
mem->flags = flags; |
240 |
|
241 |
/* If nothing changed effectively, no need to issue ioctl */
|
242 |
if (s->migration_log) {
|
243 |
flags |= KVM_MEM_LOG_DIRTY_PAGES; |
244 |
} |
245 |
if (flags == old_flags) {
|
246 |
return 0; |
247 |
} |
248 |
|
249 |
return kvm_set_user_memory_region(s, mem);
|
250 |
} |
251 |
|
252 |
int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
|
253 |
{ |
254 |
return kvm_dirty_pages_log_change(phys_addr, size,
|
255 |
KVM_MEM_LOG_DIRTY_PAGES, |
256 |
KVM_MEM_LOG_DIRTY_PAGES); |
257 |
} |
258 |
|
259 |
int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
|
260 |
{ |
261 |
return kvm_dirty_pages_log_change(phys_addr, size,
|
262 |
0,
|
263 |
KVM_MEM_LOG_DIRTY_PAGES); |
264 |
} |
265 |
|
266 |
static int kvm_set_migration_log(int enable) |
267 |
{ |
268 |
KVMState *s = kvm_state; |
269 |
KVMSlot *mem; |
270 |
int i, err;
|
271 |
|
272 |
s->migration_log = enable; |
273 |
|
274 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
275 |
mem = &s->slots[i]; |
276 |
|
277 |
if (!mem->memory_size) {
|
278 |
continue;
|
279 |
} |
280 |
if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
|
281 |
continue;
|
282 |
} |
283 |
err = kvm_set_user_memory_region(s, mem); |
284 |
if (err) {
|
285 |
return err;
|
286 |
} |
287 |
} |
288 |
return 0; |
289 |
} |
290 |
|
291 |
/* get kvm's dirty pages bitmap and update qemu's */
|
292 |
static int kvm_get_dirty_pages_log_range(unsigned long start_addr, |
293 |
unsigned long *bitmap, |
294 |
unsigned long offset, |
295 |
unsigned long mem_size) |
296 |
{ |
297 |
unsigned int i, j; |
298 |
unsigned long page_number, addr, addr1, c; |
299 |
ram_addr_t ram_addr; |
300 |
unsigned int len = ((mem_size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) / |
301 |
HOST_LONG_BITS; |
302 |
|
303 |
/*
|
304 |
* bitmap-traveling is faster than memory-traveling (for addr...)
|
305 |
* especially when most of the memory is not dirty.
|
306 |
*/
|
307 |
for (i = 0; i < len; i++) { |
308 |
if (bitmap[i] != 0) { |
309 |
c = leul_to_cpu(bitmap[i]); |
310 |
do {
|
311 |
j = ffsl(c) - 1;
|
312 |
c &= ~(1ul << j);
|
313 |
page_number = i * HOST_LONG_BITS + j; |
314 |
addr1 = page_number * TARGET_PAGE_SIZE; |
315 |
addr = offset + addr1; |
316 |
ram_addr = cpu_get_physical_page_desc(addr); |
317 |
cpu_physical_memory_set_dirty(ram_addr); |
318 |
} while (c != 0); |
319 |
} |
320 |
} |
321 |
return 0; |
322 |
} |
323 |
|
324 |
#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
325 |
|
326 |
/**
|
327 |
* kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
|
328 |
* This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
|
329 |
* This means all bits are set to dirty.
|
330 |
*
|
331 |
* @start_add: start of logged region.
|
332 |
* @end_addr: end of logged region.
|
333 |
*/
|
334 |
static int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, |
335 |
target_phys_addr_t end_addr) |
336 |
{ |
337 |
KVMState *s = kvm_state; |
338 |
unsigned long size, allocated_size = 0; |
339 |
KVMDirtyLog d; |
340 |
KVMSlot *mem; |
341 |
int ret = 0; |
342 |
|
343 |
d.dirty_bitmap = NULL;
|
344 |
while (start_addr < end_addr) {
|
345 |
mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); |
346 |
if (mem == NULL) { |
347 |
break;
|
348 |
} |
349 |
|
350 |
size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), HOST_LONG_BITS) / 8;
|
351 |
if (!d.dirty_bitmap) {
|
352 |
d.dirty_bitmap = qemu_malloc(size); |
353 |
} else if (size > allocated_size) { |
354 |
d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size); |
355 |
} |
356 |
allocated_size = size; |
357 |
memset(d.dirty_bitmap, 0, allocated_size);
|
358 |
|
359 |
d.slot = mem->slot; |
360 |
|
361 |
if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
362 |
DPRINTF("ioctl failed %d\n", errno);
|
363 |
ret = -1;
|
364 |
break;
|
365 |
} |
366 |
|
367 |
kvm_get_dirty_pages_log_range(mem->start_addr, d.dirty_bitmap, |
368 |
mem->start_addr, mem->memory_size); |
369 |
start_addr = mem->start_addr + mem->memory_size; |
370 |
} |
371 |
qemu_free(d.dirty_bitmap); |
372 |
|
373 |
return ret;
|
374 |
} |
375 |
|
376 |
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
377 |
{ |
378 |
int ret = -ENOSYS;
|
379 |
#ifdef KVM_CAP_COALESCED_MMIO
|
380 |
KVMState *s = kvm_state; |
381 |
|
382 |
if (s->coalesced_mmio) {
|
383 |
struct kvm_coalesced_mmio_zone zone;
|
384 |
|
385 |
zone.addr = start; |
386 |
zone.size = size; |
387 |
|
388 |
ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
389 |
} |
390 |
#endif
|
391 |
|
392 |
return ret;
|
393 |
} |
394 |
|
395 |
int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
396 |
{ |
397 |
int ret = -ENOSYS;
|
398 |
#ifdef KVM_CAP_COALESCED_MMIO
|
399 |
KVMState *s = kvm_state; |
400 |
|
401 |
if (s->coalesced_mmio) {
|
402 |
struct kvm_coalesced_mmio_zone zone;
|
403 |
|
404 |
zone.addr = start; |
405 |
zone.size = size; |
406 |
|
407 |
ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
408 |
} |
409 |
#endif
|
410 |
|
411 |
return ret;
|
412 |
} |
413 |
|
414 |
int kvm_check_extension(KVMState *s, unsigned int extension) |
415 |
{ |
416 |
int ret;
|
417 |
|
418 |
ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
419 |
if (ret < 0) { |
420 |
ret = 0;
|
421 |
} |
422 |
|
423 |
return ret;
|
424 |
} |
425 |
|
426 |
static void kvm_set_phys_mem(target_phys_addr_t start_addr, |
427 |
ram_addr_t size, |
428 |
ram_addr_t phys_offset) |
429 |
{ |
430 |
KVMState *s = kvm_state; |
431 |
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
432 |
KVMSlot *mem, old; |
433 |
int err;
|
434 |
|
435 |
/* kvm works in page size chunks, but the function may be called
|
436 |
with sub-page size and unaligned start address. */
|
437 |
size = TARGET_PAGE_ALIGN(size); |
438 |
start_addr = TARGET_PAGE_ALIGN(start_addr); |
439 |
|
440 |
/* KVM does not support read-only slots */
|
441 |
phys_offset &= ~IO_MEM_ROM; |
442 |
|
443 |
while (1) { |
444 |
mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
445 |
if (!mem) {
|
446 |
break;
|
447 |
} |
448 |
|
449 |
if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr &&
|
450 |
(start_addr + size <= mem->start_addr + mem->memory_size) && |
451 |
(phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { |
452 |
/* The new slot fits into the existing one and comes with
|
453 |
* identical parameters - nothing to be done. */
|
454 |
return;
|
455 |
} |
456 |
|
457 |
old = *mem; |
458 |
|
459 |
/* unregister the overlapping slot */
|
460 |
mem->memory_size = 0;
|
461 |
err = kvm_set_user_memory_region(s, mem); |
462 |
if (err) {
|
463 |
fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
|
464 |
__func__, strerror(-err)); |
465 |
abort(); |
466 |
} |
467 |
|
468 |
/* Workaround for older KVM versions: we can't join slots, even not by
|
469 |
* unregistering the previous ones and then registering the larger
|
470 |
* slot. We have to maintain the existing fragmentation. Sigh.
|
471 |
*
|
472 |
* This workaround assumes that the new slot starts at the same
|
473 |
* address as the first existing one. If not or if some overlapping
|
474 |
* slot comes around later, we will fail (not seen in practice so far)
|
475 |
* - and actually require a recent KVM version. */
|
476 |
if (s->broken_set_mem_region &&
|
477 |
old.start_addr == start_addr && old.memory_size < size && |
478 |
flags < IO_MEM_UNASSIGNED) { |
479 |
mem = kvm_alloc_slot(s); |
480 |
mem->memory_size = old.memory_size; |
481 |
mem->start_addr = old.start_addr; |
482 |
mem->phys_offset = old.phys_offset; |
483 |
mem->flags = 0;
|
484 |
|
485 |
err = kvm_set_user_memory_region(s, mem); |
486 |
if (err) {
|
487 |
fprintf(stderr, "%s: error updating slot: %s\n", __func__,
|
488 |
strerror(-err)); |
489 |
abort(); |
490 |
} |
491 |
|
492 |
start_addr += old.memory_size; |
493 |
phys_offset += old.memory_size; |
494 |
size -= old.memory_size; |
495 |
continue;
|
496 |
} |
497 |
|
498 |
/* register prefix slot */
|
499 |
if (old.start_addr < start_addr) {
|
500 |
mem = kvm_alloc_slot(s); |
501 |
mem->memory_size = start_addr - old.start_addr; |
502 |
mem->start_addr = old.start_addr; |
503 |
mem->phys_offset = old.phys_offset; |
504 |
mem->flags = 0;
|
505 |
|
506 |
err = kvm_set_user_memory_region(s, mem); |
507 |
if (err) {
|
508 |
fprintf(stderr, "%s: error registering prefix slot: %s\n",
|
509 |
__func__, strerror(-err)); |
510 |
abort(); |
511 |
} |
512 |
} |
513 |
|
514 |
/* register suffix slot */
|
515 |
if (old.start_addr + old.memory_size > start_addr + size) {
|
516 |
ram_addr_t size_delta; |
517 |
|
518 |
mem = kvm_alloc_slot(s); |
519 |
mem->start_addr = start_addr + size; |
520 |
size_delta = mem->start_addr - old.start_addr; |
521 |
mem->memory_size = old.memory_size - size_delta; |
522 |
mem->phys_offset = old.phys_offset + size_delta; |
523 |
mem->flags = 0;
|
524 |
|
525 |
err = kvm_set_user_memory_region(s, mem); |
526 |
if (err) {
|
527 |
fprintf(stderr, "%s: error registering suffix slot: %s\n",
|
528 |
__func__, strerror(-err)); |
529 |
abort(); |
530 |
} |
531 |
} |
532 |
} |
533 |
|
534 |
/* in case the KVM bug workaround already "consumed" the new slot */
|
535 |
if (!size)
|
536 |
return;
|
537 |
|
538 |
/* KVM does not need to know about this memory */
|
539 |
if (flags >= IO_MEM_UNASSIGNED)
|
540 |
return;
|
541 |
|
542 |
mem = kvm_alloc_slot(s); |
543 |
mem->memory_size = size; |
544 |
mem->start_addr = start_addr; |
545 |
mem->phys_offset = phys_offset; |
546 |
mem->flags = 0;
|
547 |
|
548 |
err = kvm_set_user_memory_region(s, mem); |
549 |
if (err) {
|
550 |
fprintf(stderr, "%s: error registering slot: %s\n", __func__,
|
551 |
strerror(-err)); |
552 |
abort(); |
553 |
} |
554 |
} |
555 |
|
556 |
static void kvm_client_set_memory(struct CPUPhysMemoryClient *client, |
557 |
target_phys_addr_t start_addr, |
558 |
ram_addr_t size, |
559 |
ram_addr_t phys_offset) |
560 |
{ |
561 |
kvm_set_phys_mem(start_addr, size, phys_offset); |
562 |
} |
563 |
|
564 |
static int kvm_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client, |
565 |
target_phys_addr_t start_addr, |
566 |
target_phys_addr_t end_addr) |
567 |
{ |
568 |
return kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
|
569 |
} |
570 |
|
571 |
static int kvm_client_migration_log(struct CPUPhysMemoryClient *client, |
572 |
int enable)
|
573 |
{ |
574 |
return kvm_set_migration_log(enable);
|
575 |
} |
576 |
|
577 |
static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
|
578 |
.set_memory = kvm_client_set_memory, |
579 |
.sync_dirty_bitmap = kvm_client_sync_dirty_bitmap, |
580 |
.migration_log = kvm_client_migration_log, |
581 |
}; |
582 |
|
583 |
int kvm_init(int smp_cpus) |
584 |
{ |
585 |
static const char upgrade_note[] = |
586 |
"Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
|
587 |
"(see http://sourceforge.net/projects/kvm).\n";
|
588 |
KVMState *s; |
589 |
int ret;
|
590 |
int i;
|
591 |
|
592 |
s = qemu_mallocz(sizeof(KVMState));
|
593 |
|
594 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
595 |
QTAILQ_INIT(&s->kvm_sw_breakpoints); |
596 |
#endif
|
597 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
598 |
s->slots[i].slot = i; |
599 |
|
600 |
s->vmfd = -1;
|
601 |
s->fd = qemu_open("/dev/kvm", O_RDWR);
|
602 |
if (s->fd == -1) { |
603 |
fprintf(stderr, "Could not access KVM kernel module: %m\n");
|
604 |
ret = -errno; |
605 |
goto err;
|
606 |
} |
607 |
|
608 |
ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
|
609 |
if (ret < KVM_API_VERSION) {
|
610 |
if (ret > 0) |
611 |
ret = -EINVAL; |
612 |
fprintf(stderr, "kvm version too old\n");
|
613 |
goto err;
|
614 |
} |
615 |
|
616 |
if (ret > KVM_API_VERSION) {
|
617 |
ret = -EINVAL; |
618 |
fprintf(stderr, "kvm version not supported\n");
|
619 |
goto err;
|
620 |
} |
621 |
|
622 |
s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
|
623 |
if (s->vmfd < 0) { |
624 |
#ifdef TARGET_S390X
|
625 |
fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
|
626 |
"your host kernel command line\n");
|
627 |
#endif
|
628 |
goto err;
|
629 |
} |
630 |
|
631 |
/* initially, KVM allocated its own memory and we had to jump through
|
632 |
* hooks to make phys_ram_base point to this. Modern versions of KVM
|
633 |
* just use a user allocated buffer so we can use regular pages
|
634 |
* unmodified. Make sure we have a sufficiently modern version of KVM.
|
635 |
*/
|
636 |
if (!kvm_check_extension(s, KVM_CAP_USER_MEMORY)) {
|
637 |
ret = -EINVAL; |
638 |
fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n%s",
|
639 |
upgrade_note); |
640 |
goto err;
|
641 |
} |
642 |
|
643 |
/* There was a nasty bug in < kvm-80 that prevents memory slots from being
|
644 |
* destroyed properly. Since we rely on this capability, refuse to work
|
645 |
* with any kernel without this capability. */
|
646 |
if (!kvm_check_extension(s, KVM_CAP_DESTROY_MEMORY_REGION_WORKS)) {
|
647 |
ret = -EINVAL; |
648 |
|
649 |
fprintf(stderr, |
650 |
"KVM kernel module broken (DESTROY_MEMORY_REGION).\n%s",
|
651 |
upgrade_note); |
652 |
goto err;
|
653 |
} |
654 |
|
655 |
s->coalesced_mmio = 0;
|
656 |
#ifdef KVM_CAP_COALESCED_MMIO
|
657 |
s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
658 |
s->coalesced_mmio_ring = NULL;
|
659 |
#endif
|
660 |
|
661 |
s->broken_set_mem_region = 1;
|
662 |
#ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
|
663 |
ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
664 |
if (ret > 0) { |
665 |
s->broken_set_mem_region = 0;
|
666 |
} |
667 |
#endif
|
668 |
|
669 |
s->vcpu_events = 0;
|
670 |
#ifdef KVM_CAP_VCPU_EVENTS
|
671 |
s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); |
672 |
#endif
|
673 |
|
674 |
s->robust_singlestep = 0;
|
675 |
#ifdef KVM_CAP_X86_ROBUST_SINGLESTEP
|
676 |
s->robust_singlestep = |
677 |
kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); |
678 |
#endif
|
679 |
|
680 |
s->debugregs = 0;
|
681 |
#ifdef KVM_CAP_DEBUGREGS
|
682 |
s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); |
683 |
#endif
|
684 |
|
685 |
s->xsave = 0;
|
686 |
#ifdef KVM_CAP_XSAVE
|
687 |
s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); |
688 |
#endif
|
689 |
|
690 |
s->xcrs = 0;
|
691 |
#ifdef KVM_CAP_XCRS
|
692 |
s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); |
693 |
#endif
|
694 |
|
695 |
ret = kvm_arch_init(s, smp_cpus); |
696 |
if (ret < 0) |
697 |
goto err;
|
698 |
|
699 |
kvm_state = s; |
700 |
cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client); |
701 |
|
702 |
return 0; |
703 |
|
704 |
err:
|
705 |
if (s) {
|
706 |
if (s->vmfd != -1) |
707 |
close(s->vmfd); |
708 |
if (s->fd != -1) |
709 |
close(s->fd); |
710 |
} |
711 |
qemu_free(s); |
712 |
|
713 |
return ret;
|
714 |
} |
715 |
|
716 |
static int kvm_handle_io(uint16_t port, void *data, int direction, int size, |
717 |
uint32_t count) |
718 |
{ |
719 |
int i;
|
720 |
uint8_t *ptr = data; |
721 |
|
722 |
for (i = 0; i < count; i++) { |
723 |
if (direction == KVM_EXIT_IO_IN) {
|
724 |
switch (size) {
|
725 |
case 1: |
726 |
stb_p(ptr, cpu_inb(port)); |
727 |
break;
|
728 |
case 2: |
729 |
stw_p(ptr, cpu_inw(port)); |
730 |
break;
|
731 |
case 4: |
732 |
stl_p(ptr, cpu_inl(port)); |
733 |
break;
|
734 |
} |
735 |
} else {
|
736 |
switch (size) {
|
737 |
case 1: |
738 |
cpu_outb(port, ldub_p(ptr)); |
739 |
break;
|
740 |
case 2: |
741 |
cpu_outw(port, lduw_p(ptr)); |
742 |
break;
|
743 |
case 4: |
744 |
cpu_outl(port, ldl_p(ptr)); |
745 |
break;
|
746 |
} |
747 |
} |
748 |
|
749 |
ptr += size; |
750 |
} |
751 |
|
752 |
return 1; |
753 |
} |
754 |
|
755 |
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
|
756 |
static void kvm_handle_internal_error(CPUState *env, struct kvm_run *run) |
757 |
{ |
758 |
|
759 |
if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
|
760 |
int i;
|
761 |
|
762 |
fprintf(stderr, "KVM internal error. Suberror: %d\n",
|
763 |
run->internal.suberror); |
764 |
|
765 |
for (i = 0; i < run->internal.ndata; ++i) { |
766 |
fprintf(stderr, "extra data[%d]: %"PRIx64"\n", |
767 |
i, (uint64_t)run->internal.data[i]); |
768 |
} |
769 |
} |
770 |
cpu_dump_state(env, stderr, fprintf, 0);
|
771 |
if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
|
772 |
fprintf(stderr, "emulation failure\n");
|
773 |
if (!kvm_arch_stop_on_emulation_error(env))
|
774 |
return;
|
775 |
} |
776 |
/* FIXME: Should trigger a qmp message to let management know
|
777 |
* something went wrong.
|
778 |
*/
|
779 |
vm_stop(0);
|
780 |
} |
781 |
#endif
|
782 |
|
783 |
void kvm_flush_coalesced_mmio_buffer(void) |
784 |
{ |
785 |
#ifdef KVM_CAP_COALESCED_MMIO
|
786 |
KVMState *s = kvm_state; |
787 |
if (s->coalesced_mmio_ring) {
|
788 |
struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
|
789 |
while (ring->first != ring->last) {
|
790 |
struct kvm_coalesced_mmio *ent;
|
791 |
|
792 |
ent = &ring->coalesced_mmio[ring->first]; |
793 |
|
794 |
cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
795 |
smp_wmb(); |
796 |
ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
|
797 |
} |
798 |
} |
799 |
#endif
|
800 |
} |
801 |
|
802 |
static void do_kvm_cpu_synchronize_state(void *_env) |
803 |
{ |
804 |
CPUState *env = _env; |
805 |
|
806 |
if (!env->kvm_vcpu_dirty) {
|
807 |
kvm_arch_get_registers(env); |
808 |
env->kvm_vcpu_dirty = 1;
|
809 |
} |
810 |
} |
811 |
|
812 |
void kvm_cpu_synchronize_state(CPUState *env)
|
813 |
{ |
814 |
if (!env->kvm_vcpu_dirty)
|
815 |
run_on_cpu(env, do_kvm_cpu_synchronize_state, env); |
816 |
} |
817 |
|
818 |
void kvm_cpu_synchronize_post_reset(CPUState *env)
|
819 |
{ |
820 |
kvm_arch_put_registers(env, KVM_PUT_RESET_STATE); |
821 |
env->kvm_vcpu_dirty = 0;
|
822 |
} |
823 |
|
824 |
void kvm_cpu_synchronize_post_init(CPUState *env)
|
825 |
{ |
826 |
kvm_arch_put_registers(env, KVM_PUT_FULL_STATE); |
827 |
env->kvm_vcpu_dirty = 0;
|
828 |
} |
829 |
|
830 |
int kvm_cpu_exec(CPUState *env)
|
831 |
{ |
832 |
struct kvm_run *run = env->kvm_run;
|
833 |
int ret;
|
834 |
|
835 |
DPRINTF("kvm_cpu_exec()\n");
|
836 |
|
837 |
do {
|
838 |
#ifndef CONFIG_IOTHREAD
|
839 |
if (env->exit_request) {
|
840 |
DPRINTF("interrupt exit requested\n");
|
841 |
ret = 0;
|
842 |
break;
|
843 |
} |
844 |
#endif
|
845 |
|
846 |
if (kvm_arch_process_irqchip_events(env)) {
|
847 |
ret = 0;
|
848 |
break;
|
849 |
} |
850 |
|
851 |
if (env->kvm_vcpu_dirty) {
|
852 |
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE); |
853 |
env->kvm_vcpu_dirty = 0;
|
854 |
} |
855 |
|
856 |
kvm_arch_pre_run(env, run); |
857 |
cpu_single_env = NULL;
|
858 |
qemu_mutex_unlock_iothread(); |
859 |
ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
|
860 |
qemu_mutex_lock_iothread(); |
861 |
cpu_single_env = env; |
862 |
kvm_arch_post_run(env, run); |
863 |
|
864 |
if (ret == -EINTR || ret == -EAGAIN) {
|
865 |
cpu_exit(env); |
866 |
DPRINTF("io window exit\n");
|
867 |
ret = 0;
|
868 |
break;
|
869 |
} |
870 |
|
871 |
if (ret < 0) { |
872 |
DPRINTF("kvm run failed %s\n", strerror(-ret));
|
873 |
abort(); |
874 |
} |
875 |
|
876 |
kvm_flush_coalesced_mmio_buffer(); |
877 |
|
878 |
ret = 0; /* exit loop */ |
879 |
switch (run->exit_reason) {
|
880 |
case KVM_EXIT_IO:
|
881 |
DPRINTF("handle_io\n");
|
882 |
ret = kvm_handle_io(run->io.port, |
883 |
(uint8_t *)run + run->io.data_offset, |
884 |
run->io.direction, |
885 |
run->io.size, |
886 |
run->io.count); |
887 |
break;
|
888 |
case KVM_EXIT_MMIO:
|
889 |
DPRINTF("handle_mmio\n");
|
890 |
cpu_physical_memory_rw(run->mmio.phys_addr, |
891 |
run->mmio.data, |
892 |
run->mmio.len, |
893 |
run->mmio.is_write); |
894 |
ret = 1;
|
895 |
break;
|
896 |
case KVM_EXIT_IRQ_WINDOW_OPEN:
|
897 |
DPRINTF("irq_window_open\n");
|
898 |
break;
|
899 |
case KVM_EXIT_SHUTDOWN:
|
900 |
DPRINTF("shutdown\n");
|
901 |
qemu_system_reset_request(); |
902 |
ret = 1;
|
903 |
break;
|
904 |
case KVM_EXIT_UNKNOWN:
|
905 |
DPRINTF("kvm_exit_unknown\n");
|
906 |
break;
|
907 |
case KVM_EXIT_FAIL_ENTRY:
|
908 |
DPRINTF("kvm_exit_fail_entry\n");
|
909 |
break;
|
910 |
case KVM_EXIT_EXCEPTION:
|
911 |
DPRINTF("kvm_exit_exception\n");
|
912 |
break;
|
913 |
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
|
914 |
case KVM_EXIT_INTERNAL_ERROR:
|
915 |
kvm_handle_internal_error(env, run); |
916 |
break;
|
917 |
#endif
|
918 |
case KVM_EXIT_DEBUG:
|
919 |
DPRINTF("kvm_exit_debug\n");
|
920 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
921 |
if (kvm_arch_debug(&run->debug.arch)) {
|
922 |
env->exception_index = EXCP_DEBUG; |
923 |
return 0; |
924 |
} |
925 |
/* re-enter, this exception was guest-internal */
|
926 |
ret = 1;
|
927 |
#endif /* KVM_CAP_SET_GUEST_DEBUG */ |
928 |
break;
|
929 |
default:
|
930 |
DPRINTF("kvm_arch_handle_exit\n");
|
931 |
ret = kvm_arch_handle_exit(env, run); |
932 |
break;
|
933 |
} |
934 |
} while (ret > 0); |
935 |
|
936 |
if (env->exit_request) {
|
937 |
env->exit_request = 0;
|
938 |
env->exception_index = EXCP_INTERRUPT; |
939 |
} |
940 |
|
941 |
return ret;
|
942 |
} |
943 |
|
944 |
int kvm_ioctl(KVMState *s, int type, ...) |
945 |
{ |
946 |
int ret;
|
947 |
void *arg;
|
948 |
va_list ap; |
949 |
|
950 |
va_start(ap, type); |
951 |
arg = va_arg(ap, void *);
|
952 |
va_end(ap); |
953 |
|
954 |
ret = ioctl(s->fd, type, arg); |
955 |
if (ret == -1) |
956 |
ret = -errno; |
957 |
|
958 |
return ret;
|
959 |
} |
960 |
|
961 |
int kvm_vm_ioctl(KVMState *s, int type, ...) |
962 |
{ |
963 |
int ret;
|
964 |
void *arg;
|
965 |
va_list ap; |
966 |
|
967 |
va_start(ap, type); |
968 |
arg = va_arg(ap, void *);
|
969 |
va_end(ap); |
970 |
|
971 |
ret = ioctl(s->vmfd, type, arg); |
972 |
if (ret == -1) |
973 |
ret = -errno; |
974 |
|
975 |
return ret;
|
976 |
} |
977 |
|
978 |
int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
979 |
{ |
980 |
int ret;
|
981 |
void *arg;
|
982 |
va_list ap; |
983 |
|
984 |
va_start(ap, type); |
985 |
arg = va_arg(ap, void *);
|
986 |
va_end(ap); |
987 |
|
988 |
ret = ioctl(env->kvm_fd, type, arg); |
989 |
if (ret == -1) |
990 |
ret = -errno; |
991 |
|
992 |
return ret;
|
993 |
} |
994 |
|
995 |
int kvm_has_sync_mmu(void) |
996 |
{ |
997 |
#ifdef KVM_CAP_SYNC_MMU
|
998 |
KVMState *s = kvm_state; |
999 |
|
1000 |
return kvm_check_extension(s, KVM_CAP_SYNC_MMU);
|
1001 |
#else
|
1002 |
return 0; |
1003 |
#endif
|
1004 |
} |
1005 |
|
1006 |
int kvm_has_vcpu_events(void) |
1007 |
{ |
1008 |
return kvm_state->vcpu_events;
|
1009 |
} |
1010 |
|
1011 |
int kvm_has_robust_singlestep(void) |
1012 |
{ |
1013 |
return kvm_state->robust_singlestep;
|
1014 |
} |
1015 |
|
1016 |
int kvm_has_debugregs(void) |
1017 |
{ |
1018 |
return kvm_state->debugregs;
|
1019 |
} |
1020 |
|
1021 |
int kvm_has_xsave(void) |
1022 |
{ |
1023 |
return kvm_state->xsave;
|
1024 |
} |
1025 |
|
1026 |
int kvm_has_xcrs(void) |
1027 |
{ |
1028 |
return kvm_state->xcrs;
|
1029 |
} |
1030 |
|
1031 |
void kvm_setup_guest_memory(void *start, size_t size) |
1032 |
{ |
1033 |
if (!kvm_has_sync_mmu()) {
|
1034 |
#ifdef MADV_DONTFORK
|
1035 |
int ret = madvise(start, size, MADV_DONTFORK);
|
1036 |
|
1037 |
if (ret) {
|
1038 |
perror("madvice");
|
1039 |
exit(1);
|
1040 |
} |
1041 |
#else
|
1042 |
fprintf(stderr, |
1043 |
"Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
|
1044 |
exit(1);
|
1045 |
#endif
|
1046 |
} |
1047 |
} |
1048 |
|
1049 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
1050 |
struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
|
1051 |
target_ulong pc) |
1052 |
{ |
1053 |
struct kvm_sw_breakpoint *bp;
|
1054 |
|
1055 |
QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
1056 |
if (bp->pc == pc)
|
1057 |
return bp;
|
1058 |
} |
1059 |
return NULL; |
1060 |
} |
1061 |
|
1062 |
int kvm_sw_breakpoints_active(CPUState *env)
|
1063 |
{ |
1064 |
return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
|
1065 |
} |
1066 |
|
1067 |
struct kvm_set_guest_debug_data {
|
1068 |
struct kvm_guest_debug dbg;
|
1069 |
CPUState *env; |
1070 |
int err;
|
1071 |
}; |
1072 |
|
1073 |
static void kvm_invoke_set_guest_debug(void *data) |
1074 |
{ |
1075 |
struct kvm_set_guest_debug_data *dbg_data = data;
|
1076 |
CPUState *env = dbg_data->env; |
1077 |
|
1078 |
dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); |
1079 |
} |
1080 |
|
1081 |
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1082 |
{ |
1083 |
struct kvm_set_guest_debug_data data;
|
1084 |
|
1085 |
data.dbg.control = reinject_trap; |
1086 |
|
1087 |
if (env->singlestep_enabled) {
|
1088 |
data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
1089 |
} |
1090 |
kvm_arch_update_guest_debug(env, &data.dbg); |
1091 |
data.env = env; |
1092 |
|
1093 |
run_on_cpu(env, kvm_invoke_set_guest_debug, &data); |
1094 |
return data.err;
|
1095 |
} |
1096 |
|
1097 |
int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1098 |
target_ulong len, int type)
|
1099 |
{ |
1100 |
struct kvm_sw_breakpoint *bp;
|
1101 |
CPUState *env; |
1102 |
int err;
|
1103 |
|
1104 |
if (type == GDB_BREAKPOINT_SW) {
|
1105 |
bp = kvm_find_sw_breakpoint(current_env, addr); |
1106 |
if (bp) {
|
1107 |
bp->use_count++; |
1108 |
return 0; |
1109 |
} |
1110 |
|
1111 |
bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
1112 |
if (!bp)
|
1113 |
return -ENOMEM;
|
1114 |
|
1115 |
bp->pc = addr; |
1116 |
bp->use_count = 1;
|
1117 |
err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
1118 |
if (err) {
|
1119 |
free(bp); |
1120 |
return err;
|
1121 |
} |
1122 |
|
1123 |
QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
1124 |
bp, entry); |
1125 |
} else {
|
1126 |
err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
1127 |
if (err)
|
1128 |
return err;
|
1129 |
} |
1130 |
|
1131 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1132 |
err = kvm_update_guest_debug(env, 0);
|
1133 |
if (err)
|
1134 |
return err;
|
1135 |
} |
1136 |
return 0; |
1137 |
} |
1138 |
|
1139 |
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1140 |
target_ulong len, int type)
|
1141 |
{ |
1142 |
struct kvm_sw_breakpoint *bp;
|
1143 |
CPUState *env; |
1144 |
int err;
|
1145 |
|
1146 |
if (type == GDB_BREAKPOINT_SW) {
|
1147 |
bp = kvm_find_sw_breakpoint(current_env, addr); |
1148 |
if (!bp)
|
1149 |
return -ENOENT;
|
1150 |
|
1151 |
if (bp->use_count > 1) { |
1152 |
bp->use_count--; |
1153 |
return 0; |
1154 |
} |
1155 |
|
1156 |
err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
1157 |
if (err)
|
1158 |
return err;
|
1159 |
|
1160 |
QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
1161 |
qemu_free(bp); |
1162 |
} else {
|
1163 |
err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
1164 |
if (err)
|
1165 |
return err;
|
1166 |
} |
1167 |
|
1168 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1169 |
err = kvm_update_guest_debug(env, 0);
|
1170 |
if (err)
|
1171 |
return err;
|
1172 |
} |
1173 |
return 0; |
1174 |
} |
1175 |
|
1176 |
void kvm_remove_all_breakpoints(CPUState *current_env)
|
1177 |
{ |
1178 |
struct kvm_sw_breakpoint *bp, *next;
|
1179 |
KVMState *s = current_env->kvm_state; |
1180 |
CPUState *env; |
1181 |
|
1182 |
QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
1183 |
if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
1184 |
/* Try harder to find a CPU that currently sees the breakpoint. */
|
1185 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1186 |
if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) |
1187 |
break;
|
1188 |
} |
1189 |
} |
1190 |
} |
1191 |
kvm_arch_remove_all_hw_breakpoints(); |
1192 |
|
1193 |
for (env = first_cpu; env != NULL; env = env->next_cpu) |
1194 |
kvm_update_guest_debug(env, 0);
|
1195 |
} |
1196 |
|
1197 |
#else /* !KVM_CAP_SET_GUEST_DEBUG */ |
1198 |
|
1199 |
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1200 |
{ |
1201 |
return -EINVAL;
|
1202 |
} |
1203 |
|
1204 |
int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1205 |
target_ulong len, int type)
|
1206 |
{ |
1207 |
return -EINVAL;
|
1208 |
} |
1209 |
|
1210 |
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1211 |
target_ulong len, int type)
|
1212 |
{ |
1213 |
return -EINVAL;
|
1214 |
} |
1215 |
|
1216 |
void kvm_remove_all_breakpoints(CPUState *current_env)
|
1217 |
{ |
1218 |
} |
1219 |
#endif /* !KVM_CAP_SET_GUEST_DEBUG */ |
1220 |
|
1221 |
int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset) |
1222 |
{ |
1223 |
struct kvm_signal_mask *sigmask;
|
1224 |
int r;
|
1225 |
|
1226 |
if (!sigset)
|
1227 |
return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL); |
1228 |
|
1229 |
sigmask = qemu_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
1230 |
|
1231 |
sigmask->len = 8;
|
1232 |
memcpy(sigmask->sigset, sigset, sizeof(*sigset));
|
1233 |
r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask); |
1234 |
free(sigmask); |
1235 |
|
1236 |
return r;
|
1237 |
} |
1238 |
|
1239 |
int kvm_set_ioeventfd_mmio_long(int fd, uint32_t addr, uint32_t val, bool assign) |
1240 |
{ |
1241 |
#ifdef KVM_IOEVENTFD
|
1242 |
int ret;
|
1243 |
struct kvm_ioeventfd iofd;
|
1244 |
|
1245 |
iofd.datamatch = val; |
1246 |
iofd.addr = addr; |
1247 |
iofd.len = 4;
|
1248 |
iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH; |
1249 |
iofd.fd = fd; |
1250 |
|
1251 |
if (!kvm_enabled()) {
|
1252 |
return -ENOSYS;
|
1253 |
} |
1254 |
|
1255 |
if (!assign) {
|
1256 |
iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
1257 |
} |
1258 |
|
1259 |
ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); |
1260 |
|
1261 |
if (ret < 0) { |
1262 |
return -errno;
|
1263 |
} |
1264 |
|
1265 |
return 0; |
1266 |
#else
|
1267 |
return -ENOSYS;
|
1268 |
#endif
|
1269 |
} |
1270 |
|
1271 |
int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign) |
1272 |
{ |
1273 |
#ifdef KVM_IOEVENTFD
|
1274 |
struct kvm_ioeventfd kick = {
|
1275 |
.datamatch = val, |
1276 |
.addr = addr, |
1277 |
.len = 2,
|
1278 |
.flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO, |
1279 |
.fd = fd, |
1280 |
}; |
1281 |
int r;
|
1282 |
if (!kvm_enabled())
|
1283 |
return -ENOSYS;
|
1284 |
if (!assign)
|
1285 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
1286 |
r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); |
1287 |
if (r < 0) |
1288 |
return r;
|
1289 |
return 0; |
1290 |
#else
|
1291 |
return -ENOSYS;
|
1292 |
#endif
|
1293 |
} |