root / kvm-all.c @ e44089c7
History | View | Annotate | Download (35.6 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 |
/* This check must be after config-host.h is included */
|
32 |
#ifdef CONFIG_EVENTFD
|
33 |
#include <sys/eventfd.h> |
34 |
#endif
|
35 |
|
36 |
/* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */
|
37 |
#define PAGE_SIZE TARGET_PAGE_SIZE
|
38 |
|
39 |
//#define DEBUG_KVM
|
40 |
|
41 |
#ifdef DEBUG_KVM
|
42 |
#define DPRINTF(fmt, ...) \
|
43 |
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
44 |
#else
|
45 |
#define DPRINTF(fmt, ...) \
|
46 |
do { } while (0) |
47 |
#endif
|
48 |
|
49 |
typedef struct KVMSlot |
50 |
{ |
51 |
target_phys_addr_t start_addr; |
52 |
ram_addr_t memory_size; |
53 |
ram_addr_t phys_offset; |
54 |
int slot;
|
55 |
int flags;
|
56 |
} KVMSlot; |
57 |
|
58 |
typedef struct kvm_dirty_log KVMDirtyLog; |
59 |
|
60 |
struct KVMState
|
61 |
{ |
62 |
KVMSlot slots[32];
|
63 |
int fd;
|
64 |
int vmfd;
|
65 |
int coalesced_mmio;
|
66 |
struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
|
67 |
int broken_set_mem_region;
|
68 |
int migration_log;
|
69 |
int vcpu_events;
|
70 |
int robust_singlestep;
|
71 |
int debugregs;
|
72 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
73 |
struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
|
74 |
#endif
|
75 |
int irqchip_in_kernel;
|
76 |
int pit_in_kernel;
|
77 |
int xsave, xcrs;
|
78 |
int many_ioeventfds;
|
79 |
}; |
80 |
|
81 |
KVMState *kvm_state; |
82 |
|
83 |
static const KVMCapabilityInfo kvm_required_capabilites[] = { |
84 |
KVM_CAP_INFO(USER_MEMORY), |
85 |
KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), |
86 |
KVM_CAP_LAST_INFO |
87 |
}; |
88 |
|
89 |
static KVMSlot *kvm_alloc_slot(KVMState *s)
|
90 |
{ |
91 |
int i;
|
92 |
|
93 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
94 |
if (s->slots[i].memory_size == 0) { |
95 |
return &s->slots[i];
|
96 |
} |
97 |
} |
98 |
|
99 |
fprintf(stderr, "%s: no free slot available\n", __func__);
|
100 |
abort(); |
101 |
} |
102 |
|
103 |
static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
|
104 |
target_phys_addr_t start_addr, |
105 |
target_phys_addr_t end_addr) |
106 |
{ |
107 |
int i;
|
108 |
|
109 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
110 |
KVMSlot *mem = &s->slots[i]; |
111 |
|
112 |
if (start_addr == mem->start_addr &&
|
113 |
end_addr == mem->start_addr + mem->memory_size) { |
114 |
return mem;
|
115 |
} |
116 |
} |
117 |
|
118 |
return NULL; |
119 |
} |
120 |
|
121 |
/*
|
122 |
* Find overlapping slot with lowest start address
|
123 |
*/
|
124 |
static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
|
125 |
target_phys_addr_t start_addr, |
126 |
target_phys_addr_t end_addr) |
127 |
{ |
128 |
KVMSlot *found = NULL;
|
129 |
int i;
|
130 |
|
131 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
132 |
KVMSlot *mem = &s->slots[i]; |
133 |
|
134 |
if (mem->memory_size == 0 || |
135 |
(found && found->start_addr < mem->start_addr)) { |
136 |
continue;
|
137 |
} |
138 |
|
139 |
if (end_addr > mem->start_addr &&
|
140 |
start_addr < mem->start_addr + mem->memory_size) { |
141 |
found = mem; |
142 |
} |
143 |
} |
144 |
|
145 |
return found;
|
146 |
} |
147 |
|
148 |
int kvm_physical_memory_addr_from_ram(KVMState *s, ram_addr_t ram_addr,
|
149 |
target_phys_addr_t *phys_addr) |
150 |
{ |
151 |
int i;
|
152 |
|
153 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
154 |
KVMSlot *mem = &s->slots[i]; |
155 |
|
156 |
if (ram_addr >= mem->phys_offset &&
|
157 |
ram_addr < mem->phys_offset + mem->memory_size) { |
158 |
*phys_addr = mem->start_addr + (ram_addr - mem->phys_offset); |
159 |
return 1; |
160 |
} |
161 |
} |
162 |
|
163 |
return 0; |
164 |
} |
165 |
|
166 |
static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
167 |
{ |
168 |
struct kvm_userspace_memory_region mem;
|
169 |
|
170 |
mem.slot = slot->slot; |
171 |
mem.guest_phys_addr = slot->start_addr; |
172 |
mem.memory_size = slot->memory_size; |
173 |
mem.userspace_addr = (unsigned long)qemu_safe_ram_ptr(slot->phys_offset); |
174 |
mem.flags = slot->flags; |
175 |
if (s->migration_log) {
|
176 |
mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; |
177 |
} |
178 |
return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
|
179 |
} |
180 |
|
181 |
static void kvm_reset_vcpu(void *opaque) |
182 |
{ |
183 |
CPUState *env = opaque; |
184 |
|
185 |
kvm_arch_reset_vcpu(env); |
186 |
} |
187 |
|
188 |
int kvm_irqchip_in_kernel(void) |
189 |
{ |
190 |
return kvm_state->irqchip_in_kernel;
|
191 |
} |
192 |
|
193 |
int kvm_pit_in_kernel(void) |
194 |
{ |
195 |
return kvm_state->pit_in_kernel;
|
196 |
} |
197 |
|
198 |
int kvm_init_vcpu(CPUState *env)
|
199 |
{ |
200 |
KVMState *s = kvm_state; |
201 |
long mmap_size;
|
202 |
int ret;
|
203 |
|
204 |
DPRINTF("kvm_init_vcpu\n");
|
205 |
|
206 |
ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
207 |
if (ret < 0) { |
208 |
DPRINTF("kvm_create_vcpu failed\n");
|
209 |
goto err;
|
210 |
} |
211 |
|
212 |
env->kvm_fd = ret; |
213 |
env->kvm_state = s; |
214 |
env->kvm_vcpu_dirty = 1;
|
215 |
|
216 |
mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
|
217 |
if (mmap_size < 0) { |
218 |
ret = mmap_size; |
219 |
DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
|
220 |
goto err;
|
221 |
} |
222 |
|
223 |
env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
|
224 |
env->kvm_fd, 0);
|
225 |
if (env->kvm_run == MAP_FAILED) {
|
226 |
ret = -errno; |
227 |
DPRINTF("mmap'ing vcpu state failed\n");
|
228 |
goto err;
|
229 |
} |
230 |
|
231 |
if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
|
232 |
s->coalesced_mmio_ring = |
233 |
(void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE;
|
234 |
} |
235 |
|
236 |
ret = kvm_arch_init_vcpu(env); |
237 |
if (ret == 0) { |
238 |
qemu_register_reset(kvm_reset_vcpu, env); |
239 |
kvm_arch_reset_vcpu(env); |
240 |
} |
241 |
err:
|
242 |
return ret;
|
243 |
} |
244 |
|
245 |
/*
|
246 |
* dirty pages logging control
|
247 |
*/
|
248 |
|
249 |
static int kvm_mem_flags(KVMState *s, bool log_dirty) |
250 |
{ |
251 |
return log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0; |
252 |
} |
253 |
|
254 |
static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty) |
255 |
{ |
256 |
KVMState *s = kvm_state; |
257 |
int flags, mask = KVM_MEM_LOG_DIRTY_PAGES;
|
258 |
int old_flags;
|
259 |
|
260 |
old_flags = mem->flags; |
261 |
|
262 |
flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty); |
263 |
mem->flags = flags; |
264 |
|
265 |
/* If nothing changed effectively, no need to issue ioctl */
|
266 |
if (s->migration_log) {
|
267 |
flags |= KVM_MEM_LOG_DIRTY_PAGES; |
268 |
} |
269 |
|
270 |
if (flags == old_flags) {
|
271 |
return 0; |
272 |
} |
273 |
|
274 |
return kvm_set_user_memory_region(s, mem);
|
275 |
} |
276 |
|
277 |
static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
278 |
ram_addr_t size, bool log_dirty)
|
279 |
{ |
280 |
KVMState *s = kvm_state; |
281 |
KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
282 |
|
283 |
if (mem == NULL) { |
284 |
fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
285 |
TARGET_FMT_plx "\n", __func__, phys_addr,
|
286 |
(target_phys_addr_t)(phys_addr + size - 1));
|
287 |
return -EINVAL;
|
288 |
} |
289 |
return kvm_slot_dirty_pages_log_change(mem, log_dirty);
|
290 |
} |
291 |
|
292 |
static int kvm_log_start(CPUPhysMemoryClient *client, |
293 |
target_phys_addr_t phys_addr, ram_addr_t size) |
294 |
{ |
295 |
return kvm_dirty_pages_log_change(phys_addr, size, true); |
296 |
} |
297 |
|
298 |
static int kvm_log_stop(CPUPhysMemoryClient *client, |
299 |
target_phys_addr_t phys_addr, ram_addr_t size) |
300 |
{ |
301 |
return kvm_dirty_pages_log_change(phys_addr, size, false); |
302 |
} |
303 |
|
304 |
static int kvm_set_migration_log(int enable) |
305 |
{ |
306 |
KVMState *s = kvm_state; |
307 |
KVMSlot *mem; |
308 |
int i, err;
|
309 |
|
310 |
s->migration_log = enable; |
311 |
|
312 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
313 |
mem = &s->slots[i]; |
314 |
|
315 |
if (!mem->memory_size) {
|
316 |
continue;
|
317 |
} |
318 |
if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
|
319 |
continue;
|
320 |
} |
321 |
err = kvm_set_user_memory_region(s, mem); |
322 |
if (err) {
|
323 |
return err;
|
324 |
} |
325 |
} |
326 |
return 0; |
327 |
} |
328 |
|
329 |
/* get kvm's dirty pages bitmap and update qemu's */
|
330 |
static int kvm_get_dirty_pages_log_range(unsigned long start_addr, |
331 |
unsigned long *bitmap, |
332 |
unsigned long offset, |
333 |
unsigned long mem_size) |
334 |
{ |
335 |
unsigned int i, j; |
336 |
unsigned long page_number, addr, addr1, c; |
337 |
ram_addr_t ram_addr; |
338 |
unsigned int len = ((mem_size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) / |
339 |
HOST_LONG_BITS; |
340 |
|
341 |
/*
|
342 |
* bitmap-traveling is faster than memory-traveling (for addr...)
|
343 |
* especially when most of the memory is not dirty.
|
344 |
*/
|
345 |
for (i = 0; i < len; i++) { |
346 |
if (bitmap[i] != 0) { |
347 |
c = leul_to_cpu(bitmap[i]); |
348 |
do {
|
349 |
j = ffsl(c) - 1;
|
350 |
c &= ~(1ul << j);
|
351 |
page_number = i * HOST_LONG_BITS + j; |
352 |
addr1 = page_number * TARGET_PAGE_SIZE; |
353 |
addr = offset + addr1; |
354 |
ram_addr = cpu_get_physical_page_desc(addr); |
355 |
cpu_physical_memory_set_dirty(ram_addr); |
356 |
} while (c != 0); |
357 |
} |
358 |
} |
359 |
return 0; |
360 |
} |
361 |
|
362 |
#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
363 |
|
364 |
/**
|
365 |
* kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
|
366 |
* This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
|
367 |
* This means all bits are set to dirty.
|
368 |
*
|
369 |
* @start_add: start of logged region.
|
370 |
* @end_addr: end of logged region.
|
371 |
*/
|
372 |
static int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, |
373 |
target_phys_addr_t end_addr) |
374 |
{ |
375 |
KVMState *s = kvm_state; |
376 |
unsigned long size, allocated_size = 0; |
377 |
KVMDirtyLog d; |
378 |
KVMSlot *mem; |
379 |
int ret = 0; |
380 |
|
381 |
d.dirty_bitmap = NULL;
|
382 |
while (start_addr < end_addr) {
|
383 |
mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); |
384 |
if (mem == NULL) { |
385 |
break;
|
386 |
} |
387 |
|
388 |
/* XXX bad kernel interface alert
|
389 |
* For dirty bitmap, kernel allocates array of size aligned to
|
390 |
* bits-per-long. But for case when the kernel is 64bits and
|
391 |
* the userspace is 32bits, userspace can't align to the same
|
392 |
* bits-per-long, since sizeof(long) is different between kernel
|
393 |
* and user space. This way, userspace will provide buffer which
|
394 |
* may be 4 bytes less than the kernel will use, resulting in
|
395 |
* userspace memory corruption (which is not detectable by valgrind
|
396 |
* too, in most cases).
|
397 |
* So for now, let's align to 64 instead of HOST_LONG_BITS here, in
|
398 |
* a hope that sizeof(long) wont become >8 any time soon.
|
399 |
*/
|
400 |
size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), |
401 |
/*HOST_LONG_BITS*/ 64) / 8; |
402 |
if (!d.dirty_bitmap) {
|
403 |
d.dirty_bitmap = qemu_malloc(size); |
404 |
} else if (size > allocated_size) { |
405 |
d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size); |
406 |
} |
407 |
allocated_size = size; |
408 |
memset(d.dirty_bitmap, 0, allocated_size);
|
409 |
|
410 |
d.slot = mem->slot; |
411 |
|
412 |
if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
413 |
DPRINTF("ioctl failed %d\n", errno);
|
414 |
ret = -1;
|
415 |
break;
|
416 |
} |
417 |
|
418 |
kvm_get_dirty_pages_log_range(mem->start_addr, d.dirty_bitmap, |
419 |
mem->start_addr, mem->memory_size); |
420 |
start_addr = mem->start_addr + mem->memory_size; |
421 |
} |
422 |
qemu_free(d.dirty_bitmap); |
423 |
|
424 |
return ret;
|
425 |
} |
426 |
|
427 |
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
428 |
{ |
429 |
int ret = -ENOSYS;
|
430 |
KVMState *s = kvm_state; |
431 |
|
432 |
if (s->coalesced_mmio) {
|
433 |
struct kvm_coalesced_mmio_zone zone;
|
434 |
|
435 |
zone.addr = start; |
436 |
zone.size = size; |
437 |
|
438 |
ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
439 |
} |
440 |
|
441 |
return ret;
|
442 |
} |
443 |
|
444 |
int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
445 |
{ |
446 |
int ret = -ENOSYS;
|
447 |
KVMState *s = kvm_state; |
448 |
|
449 |
if (s->coalesced_mmio) {
|
450 |
struct kvm_coalesced_mmio_zone zone;
|
451 |
|
452 |
zone.addr = start; |
453 |
zone.size = size; |
454 |
|
455 |
ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
456 |
} |
457 |
|
458 |
return ret;
|
459 |
} |
460 |
|
461 |
int kvm_check_extension(KVMState *s, unsigned int extension) |
462 |
{ |
463 |
int ret;
|
464 |
|
465 |
ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
466 |
if (ret < 0) { |
467 |
ret = 0;
|
468 |
} |
469 |
|
470 |
return ret;
|
471 |
} |
472 |
|
473 |
static int kvm_check_many_ioeventfds(void) |
474 |
{ |
475 |
/* Userspace can use ioeventfd for io notification. This requires a host
|
476 |
* that supports eventfd(2) and an I/O thread; since eventfd does not
|
477 |
* support SIGIO it cannot interrupt the vcpu.
|
478 |
*
|
479 |
* Older kernels have a 6 device limit on the KVM io bus. Find out so we
|
480 |
* can avoid creating too many ioeventfds.
|
481 |
*/
|
482 |
#if defined(CONFIG_EVENTFD) && defined(CONFIG_IOTHREAD)
|
483 |
int ioeventfds[7]; |
484 |
int i, ret = 0; |
485 |
for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { |
486 |
ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
|
487 |
if (ioeventfds[i] < 0) { |
488 |
break;
|
489 |
} |
490 |
ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true); |
491 |
if (ret < 0) { |
492 |
close(ioeventfds[i]); |
493 |
break;
|
494 |
} |
495 |
} |
496 |
|
497 |
/* Decide whether many devices are supported or not */
|
498 |
ret = i == ARRAY_SIZE(ioeventfds); |
499 |
|
500 |
while (i-- > 0) { |
501 |
kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false); |
502 |
close(ioeventfds[i]); |
503 |
} |
504 |
return ret;
|
505 |
#else
|
506 |
return 0; |
507 |
#endif
|
508 |
} |
509 |
|
510 |
static const KVMCapabilityInfo * |
511 |
kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
|
512 |
{ |
513 |
while (list->name) {
|
514 |
if (!kvm_check_extension(s, list->value)) {
|
515 |
return list;
|
516 |
} |
517 |
list++; |
518 |
} |
519 |
return NULL; |
520 |
} |
521 |
|
522 |
static void kvm_set_phys_mem(target_phys_addr_t start_addr, ram_addr_t size, |
523 |
ram_addr_t phys_offset, bool log_dirty)
|
524 |
{ |
525 |
KVMState *s = kvm_state; |
526 |
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
527 |
KVMSlot *mem, old; |
528 |
int err;
|
529 |
|
530 |
/* kvm works in page size chunks, but the function may be called
|
531 |
with sub-page size and unaligned start address. */
|
532 |
size = TARGET_PAGE_ALIGN(size); |
533 |
start_addr = TARGET_PAGE_ALIGN(start_addr); |
534 |
|
535 |
/* KVM does not support read-only slots */
|
536 |
phys_offset &= ~IO_MEM_ROM; |
537 |
|
538 |
while (1) { |
539 |
mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
540 |
if (!mem) {
|
541 |
break;
|
542 |
} |
543 |
|
544 |
if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr &&
|
545 |
(start_addr + size <= mem->start_addr + mem->memory_size) && |
546 |
(phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { |
547 |
/* The new slot fits into the existing one and comes with
|
548 |
* identical parameters - update flags and done. */
|
549 |
kvm_slot_dirty_pages_log_change(mem, log_dirty); |
550 |
return;
|
551 |
} |
552 |
|
553 |
old = *mem; |
554 |
|
555 |
/* unregister the overlapping slot */
|
556 |
mem->memory_size = 0;
|
557 |
err = kvm_set_user_memory_region(s, mem); |
558 |
if (err) {
|
559 |
fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
|
560 |
__func__, strerror(-err)); |
561 |
abort(); |
562 |
} |
563 |
|
564 |
/* Workaround for older KVM versions: we can't join slots, even not by
|
565 |
* unregistering the previous ones and then registering the larger
|
566 |
* slot. We have to maintain the existing fragmentation. Sigh.
|
567 |
*
|
568 |
* This workaround assumes that the new slot starts at the same
|
569 |
* address as the first existing one. If not or if some overlapping
|
570 |
* slot comes around later, we will fail (not seen in practice so far)
|
571 |
* - and actually require a recent KVM version. */
|
572 |
if (s->broken_set_mem_region &&
|
573 |
old.start_addr == start_addr && old.memory_size < size && |
574 |
flags < IO_MEM_UNASSIGNED) { |
575 |
mem = kvm_alloc_slot(s); |
576 |
mem->memory_size = old.memory_size; |
577 |
mem->start_addr = old.start_addr; |
578 |
mem->phys_offset = old.phys_offset; |
579 |
mem->flags = kvm_mem_flags(s, log_dirty); |
580 |
|
581 |
err = kvm_set_user_memory_region(s, mem); |
582 |
if (err) {
|
583 |
fprintf(stderr, "%s: error updating slot: %s\n", __func__,
|
584 |
strerror(-err)); |
585 |
abort(); |
586 |
} |
587 |
|
588 |
start_addr += old.memory_size; |
589 |
phys_offset += old.memory_size; |
590 |
size -= old.memory_size; |
591 |
continue;
|
592 |
} |
593 |
|
594 |
/* register prefix slot */
|
595 |
if (old.start_addr < start_addr) {
|
596 |
mem = kvm_alloc_slot(s); |
597 |
mem->memory_size = start_addr - old.start_addr; |
598 |
mem->start_addr = old.start_addr; |
599 |
mem->phys_offset = old.phys_offset; |
600 |
mem->flags = kvm_mem_flags(s, log_dirty); |
601 |
|
602 |
err = kvm_set_user_memory_region(s, mem); |
603 |
if (err) {
|
604 |
fprintf(stderr, "%s: error registering prefix slot: %s\n",
|
605 |
__func__, strerror(-err)); |
606 |
#ifdef TARGET_PPC
|
607 |
fprintf(stderr, "%s: This is probably because your kernel's " \
|
608 |
"PAGE_SIZE is too big. Please try to use 4k " \
|
609 |
"PAGE_SIZE!\n", __func__);
|
610 |
#endif
|
611 |
abort(); |
612 |
} |
613 |
} |
614 |
|
615 |
/* register suffix slot */
|
616 |
if (old.start_addr + old.memory_size > start_addr + size) {
|
617 |
ram_addr_t size_delta; |
618 |
|
619 |
mem = kvm_alloc_slot(s); |
620 |
mem->start_addr = start_addr + size; |
621 |
size_delta = mem->start_addr - old.start_addr; |
622 |
mem->memory_size = old.memory_size - size_delta; |
623 |
mem->phys_offset = old.phys_offset + size_delta; |
624 |
mem->flags = kvm_mem_flags(s, log_dirty); |
625 |
|
626 |
err = kvm_set_user_memory_region(s, mem); |
627 |
if (err) {
|
628 |
fprintf(stderr, "%s: error registering suffix slot: %s\n",
|
629 |
__func__, strerror(-err)); |
630 |
abort(); |
631 |
} |
632 |
} |
633 |
} |
634 |
|
635 |
/* in case the KVM bug workaround already "consumed" the new slot */
|
636 |
if (!size) {
|
637 |
return;
|
638 |
} |
639 |
/* KVM does not need to know about this memory */
|
640 |
if (flags >= IO_MEM_UNASSIGNED) {
|
641 |
return;
|
642 |
} |
643 |
mem = kvm_alloc_slot(s); |
644 |
mem->memory_size = size; |
645 |
mem->start_addr = start_addr; |
646 |
mem->phys_offset = phys_offset; |
647 |
mem->flags = kvm_mem_flags(s, log_dirty); |
648 |
|
649 |
err = kvm_set_user_memory_region(s, mem); |
650 |
if (err) {
|
651 |
fprintf(stderr, "%s: error registering slot: %s\n", __func__,
|
652 |
strerror(-err)); |
653 |
abort(); |
654 |
} |
655 |
} |
656 |
|
657 |
static void kvm_client_set_memory(struct CPUPhysMemoryClient *client, |
658 |
target_phys_addr_t start_addr, |
659 |
ram_addr_t size, ram_addr_t phys_offset, |
660 |
bool log_dirty)
|
661 |
{ |
662 |
kvm_set_phys_mem(start_addr, size, phys_offset, log_dirty); |
663 |
} |
664 |
|
665 |
static int kvm_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client, |
666 |
target_phys_addr_t start_addr, |
667 |
target_phys_addr_t end_addr) |
668 |
{ |
669 |
return kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
|
670 |
} |
671 |
|
672 |
static int kvm_client_migration_log(struct CPUPhysMemoryClient *client, |
673 |
int enable)
|
674 |
{ |
675 |
return kvm_set_migration_log(enable);
|
676 |
} |
677 |
|
678 |
static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
|
679 |
.set_memory = kvm_client_set_memory, |
680 |
.sync_dirty_bitmap = kvm_client_sync_dirty_bitmap, |
681 |
.migration_log = kvm_client_migration_log, |
682 |
.log_start = kvm_log_start, |
683 |
.log_stop = kvm_log_stop, |
684 |
}; |
685 |
|
686 |
static void kvm_handle_interrupt(CPUState *env, int mask) |
687 |
{ |
688 |
env->interrupt_request |= mask; |
689 |
|
690 |
if (!qemu_cpu_is_self(env)) {
|
691 |
qemu_cpu_kick(env); |
692 |
} |
693 |
} |
694 |
|
695 |
int kvm_init(void) |
696 |
{ |
697 |
static const char upgrade_note[] = |
698 |
"Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
|
699 |
"(see http://sourceforge.net/projects/kvm).\n";
|
700 |
KVMState *s; |
701 |
const KVMCapabilityInfo *missing_cap;
|
702 |
int ret;
|
703 |
int i;
|
704 |
|
705 |
s = qemu_mallocz(sizeof(KVMState));
|
706 |
|
707 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
708 |
QTAILQ_INIT(&s->kvm_sw_breakpoints); |
709 |
#endif
|
710 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
711 |
s->slots[i].slot = i; |
712 |
} |
713 |
s->vmfd = -1;
|
714 |
s->fd = qemu_open("/dev/kvm", O_RDWR);
|
715 |
if (s->fd == -1) { |
716 |
fprintf(stderr, "Could not access KVM kernel module: %m\n");
|
717 |
ret = -errno; |
718 |
goto err;
|
719 |
} |
720 |
|
721 |
ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
|
722 |
if (ret < KVM_API_VERSION) {
|
723 |
if (ret > 0) { |
724 |
ret = -EINVAL; |
725 |
} |
726 |
fprintf(stderr, "kvm version too old\n");
|
727 |
goto err;
|
728 |
} |
729 |
|
730 |
if (ret > KVM_API_VERSION) {
|
731 |
ret = -EINVAL; |
732 |
fprintf(stderr, "kvm version not supported\n");
|
733 |
goto err;
|
734 |
} |
735 |
|
736 |
s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
|
737 |
if (s->vmfd < 0) { |
738 |
#ifdef TARGET_S390X
|
739 |
fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
|
740 |
"your host kernel command line\n");
|
741 |
#endif
|
742 |
goto err;
|
743 |
} |
744 |
|
745 |
missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
746 |
if (!missing_cap) {
|
747 |
missing_cap = |
748 |
kvm_check_extension_list(s, kvm_arch_required_capabilities); |
749 |
} |
750 |
if (missing_cap) {
|
751 |
ret = -EINVAL; |
752 |
fprintf(stderr, "kvm does not support %s\n%s",
|
753 |
missing_cap->name, upgrade_note); |
754 |
goto err;
|
755 |
} |
756 |
|
757 |
s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
758 |
|
759 |
s->broken_set_mem_region = 1;
|
760 |
ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
761 |
if (ret > 0) { |
762 |
s->broken_set_mem_region = 0;
|
763 |
} |
764 |
|
765 |
#ifdef KVM_CAP_VCPU_EVENTS
|
766 |
s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); |
767 |
#endif
|
768 |
|
769 |
s->robust_singlestep = |
770 |
kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); |
771 |
|
772 |
#ifdef KVM_CAP_DEBUGREGS
|
773 |
s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); |
774 |
#endif
|
775 |
|
776 |
#ifdef KVM_CAP_XSAVE
|
777 |
s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); |
778 |
#endif
|
779 |
|
780 |
#ifdef KVM_CAP_XCRS
|
781 |
s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); |
782 |
#endif
|
783 |
|
784 |
ret = kvm_arch_init(s); |
785 |
if (ret < 0) { |
786 |
goto err;
|
787 |
} |
788 |
|
789 |
kvm_state = s; |
790 |
cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client); |
791 |
|
792 |
s->many_ioeventfds = kvm_check_many_ioeventfds(); |
793 |
|
794 |
cpu_interrupt_handler = kvm_handle_interrupt; |
795 |
|
796 |
return 0; |
797 |
|
798 |
err:
|
799 |
if (s) {
|
800 |
if (s->vmfd != -1) { |
801 |
close(s->vmfd); |
802 |
} |
803 |
if (s->fd != -1) { |
804 |
close(s->fd); |
805 |
} |
806 |
} |
807 |
qemu_free(s); |
808 |
|
809 |
return ret;
|
810 |
} |
811 |
|
812 |
static void kvm_handle_io(uint16_t port, void *data, int direction, int size, |
813 |
uint32_t count) |
814 |
{ |
815 |
int i;
|
816 |
uint8_t *ptr = data; |
817 |
|
818 |
for (i = 0; i < count; i++) { |
819 |
if (direction == KVM_EXIT_IO_IN) {
|
820 |
switch (size) {
|
821 |
case 1: |
822 |
stb_p(ptr, cpu_inb(port)); |
823 |
break;
|
824 |
case 2: |
825 |
stw_p(ptr, cpu_inw(port)); |
826 |
break;
|
827 |
case 4: |
828 |
stl_p(ptr, cpu_inl(port)); |
829 |
break;
|
830 |
} |
831 |
} else {
|
832 |
switch (size) {
|
833 |
case 1: |
834 |
cpu_outb(port, ldub_p(ptr)); |
835 |
break;
|
836 |
case 2: |
837 |
cpu_outw(port, lduw_p(ptr)); |
838 |
break;
|
839 |
case 4: |
840 |
cpu_outl(port, ldl_p(ptr)); |
841 |
break;
|
842 |
} |
843 |
} |
844 |
|
845 |
ptr += size; |
846 |
} |
847 |
} |
848 |
|
849 |
static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run) |
850 |
{ |
851 |
fprintf(stderr, "KVM internal error.");
|
852 |
if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
|
853 |
int i;
|
854 |
|
855 |
fprintf(stderr, " Suberror: %d\n", run->internal.suberror);
|
856 |
for (i = 0; i < run->internal.ndata; ++i) { |
857 |
fprintf(stderr, "extra data[%d]: %"PRIx64"\n", |
858 |
i, (uint64_t)run->internal.data[i]); |
859 |
} |
860 |
} else {
|
861 |
fprintf(stderr, "\n");
|
862 |
} |
863 |
if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
|
864 |
fprintf(stderr, "emulation failure\n");
|
865 |
if (!kvm_arch_stop_on_emulation_error(env)) {
|
866 |
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
867 |
return EXCP_INTERRUPT;
|
868 |
} |
869 |
} |
870 |
/* FIXME: Should trigger a qmp message to let management know
|
871 |
* something went wrong.
|
872 |
*/
|
873 |
return -1; |
874 |
} |
875 |
|
876 |
void kvm_flush_coalesced_mmio_buffer(void) |
877 |
{ |
878 |
KVMState *s = kvm_state; |
879 |
if (s->coalesced_mmio_ring) {
|
880 |
struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
|
881 |
while (ring->first != ring->last) {
|
882 |
struct kvm_coalesced_mmio *ent;
|
883 |
|
884 |
ent = &ring->coalesced_mmio[ring->first]; |
885 |
|
886 |
cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
887 |
smp_wmb(); |
888 |
ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
|
889 |
} |
890 |
} |
891 |
} |
892 |
|
893 |
static void do_kvm_cpu_synchronize_state(void *_env) |
894 |
{ |
895 |
CPUState *env = _env; |
896 |
|
897 |
if (!env->kvm_vcpu_dirty) {
|
898 |
kvm_arch_get_registers(env); |
899 |
env->kvm_vcpu_dirty = 1;
|
900 |
} |
901 |
} |
902 |
|
903 |
void kvm_cpu_synchronize_state(CPUState *env)
|
904 |
{ |
905 |
if (!env->kvm_vcpu_dirty) {
|
906 |
run_on_cpu(env, do_kvm_cpu_synchronize_state, env); |
907 |
} |
908 |
} |
909 |
|
910 |
void kvm_cpu_synchronize_post_reset(CPUState *env)
|
911 |
{ |
912 |
kvm_arch_put_registers(env, KVM_PUT_RESET_STATE); |
913 |
env->kvm_vcpu_dirty = 0;
|
914 |
} |
915 |
|
916 |
void kvm_cpu_synchronize_post_init(CPUState *env)
|
917 |
{ |
918 |
kvm_arch_put_registers(env, KVM_PUT_FULL_STATE); |
919 |
env->kvm_vcpu_dirty = 0;
|
920 |
} |
921 |
|
922 |
int kvm_cpu_exec(CPUState *env)
|
923 |
{ |
924 |
struct kvm_run *run = env->kvm_run;
|
925 |
int ret, run_ret;
|
926 |
|
927 |
DPRINTF("kvm_cpu_exec()\n");
|
928 |
|
929 |
if (kvm_arch_process_async_events(env)) {
|
930 |
env->exit_request = 0;
|
931 |
return EXCP_HLT;
|
932 |
} |
933 |
|
934 |
cpu_single_env = env; |
935 |
|
936 |
do {
|
937 |
if (env->kvm_vcpu_dirty) {
|
938 |
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE); |
939 |
env->kvm_vcpu_dirty = 0;
|
940 |
} |
941 |
|
942 |
kvm_arch_pre_run(env, run); |
943 |
if (env->exit_request) {
|
944 |
DPRINTF("interrupt exit requested\n");
|
945 |
/*
|
946 |
* KVM requires us to reenter the kernel after IO exits to complete
|
947 |
* instruction emulation. This self-signal will ensure that we
|
948 |
* leave ASAP again.
|
949 |
*/
|
950 |
qemu_cpu_kick_self(); |
951 |
} |
952 |
cpu_single_env = NULL;
|
953 |
qemu_mutex_unlock_iothread(); |
954 |
|
955 |
run_ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
|
956 |
|
957 |
qemu_mutex_lock_iothread(); |
958 |
cpu_single_env = env; |
959 |
kvm_arch_post_run(env, run); |
960 |
|
961 |
kvm_flush_coalesced_mmio_buffer(); |
962 |
|
963 |
if (run_ret < 0) { |
964 |
if (run_ret == -EINTR || run_ret == -EAGAIN) {
|
965 |
DPRINTF("io window exit\n");
|
966 |
ret = EXCP_INTERRUPT; |
967 |
break;
|
968 |
} |
969 |
DPRINTF("kvm run failed %s\n", strerror(-run_ret));
|
970 |
abort(); |
971 |
} |
972 |
|
973 |
switch (run->exit_reason) {
|
974 |
case KVM_EXIT_IO:
|
975 |
DPRINTF("handle_io\n");
|
976 |
kvm_handle_io(run->io.port, |
977 |
(uint8_t *)run + run->io.data_offset, |
978 |
run->io.direction, |
979 |
run->io.size, |
980 |
run->io.count); |
981 |
ret = 0;
|
982 |
break;
|
983 |
case KVM_EXIT_MMIO:
|
984 |
DPRINTF("handle_mmio\n");
|
985 |
cpu_physical_memory_rw(run->mmio.phys_addr, |
986 |
run->mmio.data, |
987 |
run->mmio.len, |
988 |
run->mmio.is_write); |
989 |
ret = 0;
|
990 |
break;
|
991 |
case KVM_EXIT_IRQ_WINDOW_OPEN:
|
992 |
DPRINTF("irq_window_open\n");
|
993 |
ret = EXCP_INTERRUPT; |
994 |
break;
|
995 |
case KVM_EXIT_SHUTDOWN:
|
996 |
DPRINTF("shutdown\n");
|
997 |
qemu_system_reset_request(); |
998 |
ret = EXCP_INTERRUPT; |
999 |
break;
|
1000 |
case KVM_EXIT_UNKNOWN:
|
1001 |
fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
1002 |
(uint64_t)run->hw.hardware_exit_reason); |
1003 |
ret = -1;
|
1004 |
break;
|
1005 |
case KVM_EXIT_INTERNAL_ERROR:
|
1006 |
ret = kvm_handle_internal_error(env, run); |
1007 |
break;
|
1008 |
default:
|
1009 |
DPRINTF("kvm_arch_handle_exit\n");
|
1010 |
ret = kvm_arch_handle_exit(env, run); |
1011 |
break;
|
1012 |
} |
1013 |
} while (ret == 0); |
1014 |
|
1015 |
if (ret < 0) { |
1016 |
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
1017 |
vm_stop(VMSTOP_PANIC); |
1018 |
} |
1019 |
|
1020 |
env->exit_request = 0;
|
1021 |
cpu_single_env = NULL;
|
1022 |
return ret;
|
1023 |
} |
1024 |
|
1025 |
int kvm_ioctl(KVMState *s, int type, ...) |
1026 |
{ |
1027 |
int ret;
|
1028 |
void *arg;
|
1029 |
va_list ap; |
1030 |
|
1031 |
va_start(ap, type); |
1032 |
arg = va_arg(ap, void *);
|
1033 |
va_end(ap); |
1034 |
|
1035 |
ret = ioctl(s->fd, type, arg); |
1036 |
if (ret == -1) { |
1037 |
ret = -errno; |
1038 |
} |
1039 |
return ret;
|
1040 |
} |
1041 |
|
1042 |
int kvm_vm_ioctl(KVMState *s, int type, ...) |
1043 |
{ |
1044 |
int ret;
|
1045 |
void *arg;
|
1046 |
va_list ap; |
1047 |
|
1048 |
va_start(ap, type); |
1049 |
arg = va_arg(ap, void *);
|
1050 |
va_end(ap); |
1051 |
|
1052 |
ret = ioctl(s->vmfd, type, arg); |
1053 |
if (ret == -1) { |
1054 |
ret = -errno; |
1055 |
} |
1056 |
return ret;
|
1057 |
} |
1058 |
|
1059 |
int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
1060 |
{ |
1061 |
int ret;
|
1062 |
void *arg;
|
1063 |
va_list ap; |
1064 |
|
1065 |
va_start(ap, type); |
1066 |
arg = va_arg(ap, void *);
|
1067 |
va_end(ap); |
1068 |
|
1069 |
ret = ioctl(env->kvm_fd, type, arg); |
1070 |
if (ret == -1) { |
1071 |
ret = -errno; |
1072 |
} |
1073 |
return ret;
|
1074 |
} |
1075 |
|
1076 |
int kvm_has_sync_mmu(void) |
1077 |
{ |
1078 |
return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
|
1079 |
} |
1080 |
|
1081 |
int kvm_has_vcpu_events(void) |
1082 |
{ |
1083 |
return kvm_state->vcpu_events;
|
1084 |
} |
1085 |
|
1086 |
int kvm_has_robust_singlestep(void) |
1087 |
{ |
1088 |
return kvm_state->robust_singlestep;
|
1089 |
} |
1090 |
|
1091 |
int kvm_has_debugregs(void) |
1092 |
{ |
1093 |
return kvm_state->debugregs;
|
1094 |
} |
1095 |
|
1096 |
int kvm_has_xsave(void) |
1097 |
{ |
1098 |
return kvm_state->xsave;
|
1099 |
} |
1100 |
|
1101 |
int kvm_has_xcrs(void) |
1102 |
{ |
1103 |
return kvm_state->xcrs;
|
1104 |
} |
1105 |
|
1106 |
int kvm_has_many_ioeventfds(void) |
1107 |
{ |
1108 |
if (!kvm_enabled()) {
|
1109 |
return 0; |
1110 |
} |
1111 |
return kvm_state->many_ioeventfds;
|
1112 |
} |
1113 |
|
1114 |
void kvm_setup_guest_memory(void *start, size_t size) |
1115 |
{ |
1116 |
if (!kvm_has_sync_mmu()) {
|
1117 |
int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
|
1118 |
|
1119 |
if (ret) {
|
1120 |
perror("qemu_madvise");
|
1121 |
fprintf(stderr, |
1122 |
"Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
|
1123 |
exit(1);
|
1124 |
} |
1125 |
} |
1126 |
} |
1127 |
|
1128 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
1129 |
struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
|
1130 |
target_ulong pc) |
1131 |
{ |
1132 |
struct kvm_sw_breakpoint *bp;
|
1133 |
|
1134 |
QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
1135 |
if (bp->pc == pc) {
|
1136 |
return bp;
|
1137 |
} |
1138 |
} |
1139 |
return NULL; |
1140 |
} |
1141 |
|
1142 |
int kvm_sw_breakpoints_active(CPUState *env)
|
1143 |
{ |
1144 |
return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
|
1145 |
} |
1146 |
|
1147 |
struct kvm_set_guest_debug_data {
|
1148 |
struct kvm_guest_debug dbg;
|
1149 |
CPUState *env; |
1150 |
int err;
|
1151 |
}; |
1152 |
|
1153 |
static void kvm_invoke_set_guest_debug(void *data) |
1154 |
{ |
1155 |
struct kvm_set_guest_debug_data *dbg_data = data;
|
1156 |
CPUState *env = dbg_data->env; |
1157 |
|
1158 |
dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); |
1159 |
} |
1160 |
|
1161 |
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1162 |
{ |
1163 |
struct kvm_set_guest_debug_data data;
|
1164 |
|
1165 |
data.dbg.control = reinject_trap; |
1166 |
|
1167 |
if (env->singlestep_enabled) {
|
1168 |
data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
1169 |
} |
1170 |
kvm_arch_update_guest_debug(env, &data.dbg); |
1171 |
data.env = env; |
1172 |
|
1173 |
run_on_cpu(env, kvm_invoke_set_guest_debug, &data); |
1174 |
return data.err;
|
1175 |
} |
1176 |
|
1177 |
int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1178 |
target_ulong len, int type)
|
1179 |
{ |
1180 |
struct kvm_sw_breakpoint *bp;
|
1181 |
CPUState *env; |
1182 |
int err;
|
1183 |
|
1184 |
if (type == GDB_BREAKPOINT_SW) {
|
1185 |
bp = kvm_find_sw_breakpoint(current_env, addr); |
1186 |
if (bp) {
|
1187 |
bp->use_count++; |
1188 |
return 0; |
1189 |
} |
1190 |
|
1191 |
bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
1192 |
if (!bp) {
|
1193 |
return -ENOMEM;
|
1194 |
} |
1195 |
|
1196 |
bp->pc = addr; |
1197 |
bp->use_count = 1;
|
1198 |
err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
1199 |
if (err) {
|
1200 |
qemu_free(bp); |
1201 |
return err;
|
1202 |
} |
1203 |
|
1204 |
QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
1205 |
bp, entry); |
1206 |
} else {
|
1207 |
err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
1208 |
if (err) {
|
1209 |
return err;
|
1210 |
} |
1211 |
} |
1212 |
|
1213 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1214 |
err = kvm_update_guest_debug(env, 0);
|
1215 |
if (err) {
|
1216 |
return err;
|
1217 |
} |
1218 |
} |
1219 |
return 0; |
1220 |
} |
1221 |
|
1222 |
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1223 |
target_ulong len, int type)
|
1224 |
{ |
1225 |
struct kvm_sw_breakpoint *bp;
|
1226 |
CPUState *env; |
1227 |
int err;
|
1228 |
|
1229 |
if (type == GDB_BREAKPOINT_SW) {
|
1230 |
bp = kvm_find_sw_breakpoint(current_env, addr); |
1231 |
if (!bp) {
|
1232 |
return -ENOENT;
|
1233 |
} |
1234 |
|
1235 |
if (bp->use_count > 1) { |
1236 |
bp->use_count--; |
1237 |
return 0; |
1238 |
} |
1239 |
|
1240 |
err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
1241 |
if (err) {
|
1242 |
return err;
|
1243 |
} |
1244 |
|
1245 |
QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
1246 |
qemu_free(bp); |
1247 |
} else {
|
1248 |
err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
1249 |
if (err) {
|
1250 |
return err;
|
1251 |
} |
1252 |
} |
1253 |
|
1254 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1255 |
err = kvm_update_guest_debug(env, 0);
|
1256 |
if (err) {
|
1257 |
return err;
|
1258 |
} |
1259 |
} |
1260 |
return 0; |
1261 |
} |
1262 |
|
1263 |
void kvm_remove_all_breakpoints(CPUState *current_env)
|
1264 |
{ |
1265 |
struct kvm_sw_breakpoint *bp, *next;
|
1266 |
KVMState *s = current_env->kvm_state; |
1267 |
CPUState *env; |
1268 |
|
1269 |
QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
1270 |
if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
1271 |
/* Try harder to find a CPU that currently sees the breakpoint. */
|
1272 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1273 |
if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) { |
1274 |
break;
|
1275 |
} |
1276 |
} |
1277 |
} |
1278 |
} |
1279 |
kvm_arch_remove_all_hw_breakpoints(); |
1280 |
|
1281 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1282 |
kvm_update_guest_debug(env, 0);
|
1283 |
} |
1284 |
} |
1285 |
|
1286 |
#else /* !KVM_CAP_SET_GUEST_DEBUG */ |
1287 |
|
1288 |
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1289 |
{ |
1290 |
return -EINVAL;
|
1291 |
} |
1292 |
|
1293 |
int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1294 |
target_ulong len, int type)
|
1295 |
{ |
1296 |
return -EINVAL;
|
1297 |
} |
1298 |
|
1299 |
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1300 |
target_ulong len, int type)
|
1301 |
{ |
1302 |
return -EINVAL;
|
1303 |
} |
1304 |
|
1305 |
void kvm_remove_all_breakpoints(CPUState *current_env)
|
1306 |
{ |
1307 |
} |
1308 |
#endif /* !KVM_CAP_SET_GUEST_DEBUG */ |
1309 |
|
1310 |
int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset) |
1311 |
{ |
1312 |
struct kvm_signal_mask *sigmask;
|
1313 |
int r;
|
1314 |
|
1315 |
if (!sigset) {
|
1316 |
return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL); |
1317 |
} |
1318 |
|
1319 |
sigmask = qemu_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
1320 |
|
1321 |
sigmask->len = 8;
|
1322 |
memcpy(sigmask->sigset, sigset, sizeof(*sigset));
|
1323 |
r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask); |
1324 |
qemu_free(sigmask); |
1325 |
|
1326 |
return r;
|
1327 |
} |
1328 |
|
1329 |
int kvm_set_ioeventfd_mmio_long(int fd, uint32_t addr, uint32_t val, bool assign) |
1330 |
{ |
1331 |
int ret;
|
1332 |
struct kvm_ioeventfd iofd;
|
1333 |
|
1334 |
iofd.datamatch = val; |
1335 |
iofd.addr = addr; |
1336 |
iofd.len = 4;
|
1337 |
iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH; |
1338 |
iofd.fd = fd; |
1339 |
|
1340 |
if (!kvm_enabled()) {
|
1341 |
return -ENOSYS;
|
1342 |
} |
1343 |
|
1344 |
if (!assign) {
|
1345 |
iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
1346 |
} |
1347 |
|
1348 |
ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); |
1349 |
|
1350 |
if (ret < 0) { |
1351 |
return -errno;
|
1352 |
} |
1353 |
|
1354 |
return 0; |
1355 |
} |
1356 |
|
1357 |
int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign) |
1358 |
{ |
1359 |
struct kvm_ioeventfd kick = {
|
1360 |
.datamatch = val, |
1361 |
.addr = addr, |
1362 |
.len = 2,
|
1363 |
.flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO, |
1364 |
.fd = fd, |
1365 |
}; |
1366 |
int r;
|
1367 |
if (!kvm_enabled()) {
|
1368 |
return -ENOSYS;
|
1369 |
} |
1370 |
if (!assign) {
|
1371 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
1372 |
} |
1373 |
r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); |
1374 |
if (r < 0) { |
1375 |
return r;
|
1376 |
} |
1377 |
return 0; |
1378 |
} |
1379 |
|
1380 |
int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr) |
1381 |
{ |
1382 |
return kvm_arch_on_sigbus_vcpu(env, code, addr);
|
1383 |
} |
1384 |
|
1385 |
int kvm_on_sigbus(int code, void *addr) |
1386 |
{ |
1387 |
return kvm_arch_on_sigbus(code, addr);
|
1388 |
} |