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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" | |
d33a1810 | 27 | #include "hw/hw.h" |
a2cb15b0 | 28 | #include "hw/pci/msi.h" |
d426d9fb | 29 | #include "hw/s390x/adapter.h" |
022c62cb | 30 | #include "exec/gdbstub.h" |
8571ed35 | 31 | #include "sysemu/kvm_int.h" |
1de7afc9 | 32 | #include "qemu/bswap.h" |
022c62cb | 33 | #include "exec/memory.h" |
747afd5b | 34 | #include "exec/ram_addr.h" |
022c62cb | 35 | #include "exec/address-spaces.h" |
1de7afc9 | 36 | #include "qemu/event_notifier.h" |
9c775729 | 37 | #include "trace.h" |
05330448 | 38 | |
135a129a AK |
39 | #include "hw/boards.h" |
40 | ||
d2f2b8a7 SH |
41 | /* This check must be after config-host.h is included */ |
42 | #ifdef CONFIG_EVENTFD | |
43 | #include <sys/eventfd.h> | |
44 | #endif | |
45 | ||
93148aa5 | 46 | /* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */ |
f65ed4c1 AL |
47 | #define PAGE_SIZE TARGET_PAGE_SIZE |
48 | ||
05330448 AL |
49 | //#define DEBUG_KVM |
50 | ||
51 | #ifdef DEBUG_KVM | |
8c0d577e | 52 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
53 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
54 | #else | |
8c0d577e | 55 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
56 | do { } while (0) |
57 | #endif | |
58 | ||
04fa27f5 JK |
59 | #define KVM_MSI_HASHTAB_SIZE 256 |
60 | ||
9d1c35df | 61 | struct KVMState |
05330448 | 62 | { |
fc02086b EH |
63 | AccelState parent_obj; |
64 | ||
fb541ca5 | 65 | int nr_slots; |
05330448 AL |
66 | int fd; |
67 | int vmfd; | |
f65ed4c1 | 68 | int coalesced_mmio; |
62a2744c | 69 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 70 | bool coalesced_flush_in_progress; |
e69917e2 | 71 | int broken_set_mem_region; |
a0fb002c | 72 | int vcpu_events; |
b0b1d690 | 73 | int robust_singlestep; |
ff44f1a3 | 74 | int debugregs; |
e22a25c9 AL |
75 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
76 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
77 | #endif | |
8a7c7393 | 78 | int pit_state2; |
f1665b21 | 79 | int xsave, xcrs; |
d2f2b8a7 | 80 | int many_ioeventfds; |
3ab73842 | 81 | int intx_set_mask; |
92e4b519 DG |
82 | /* The man page (and posix) say ioctl numbers are signed int, but |
83 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
84 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 85 | unsigned irq_set_ioctl; |
aed6efb9 | 86 | unsigned int sigmask_len; |
84b058d7 JK |
87 | #ifdef KVM_CAP_IRQ_ROUTING |
88 | struct kvm_irq_routing *irq_routes; | |
89 | int nr_allocated_irq_routes; | |
90 | uint32_t *used_gsi_bitmap; | |
4e2e4e63 | 91 | unsigned int gsi_count; |
04fa27f5 | 92 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
4a3adebb | 93 | bool direct_msi; |
84b058d7 | 94 | #endif |
7bbda04c | 95 | KVMMemoryListener memory_listener; |
9d1c35df | 96 | }; |
05330448 | 97 | |
6a7af8cb | 98 | KVMState *kvm_state; |
3d4b2649 | 99 | bool kvm_kernel_irqchip; |
7ae26bd4 | 100 | bool kvm_async_interrupts_allowed; |
215e79c0 | 101 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 102 | bool kvm_eventfds_allowed; |
cc7e0ddf | 103 | bool kvm_irqfds_allowed; |
f41389ae | 104 | bool kvm_resamplefds_allowed; |
614e41bc | 105 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 106 | bool kvm_gsi_routing_allowed; |
76fe21de | 107 | bool kvm_gsi_direct_mapping; |
13eed94e | 108 | bool kvm_allowed; |
df9c8b75 | 109 | bool kvm_readonly_mem_allowed; |
d0a073a1 | 110 | bool kvm_vm_attributes_allowed; |
05330448 | 111 | |
94a8d39a JK |
112 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
113 | KVM_CAP_INFO(USER_MEMORY), | |
114 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
115 | KVM_CAP_LAST_INFO | |
116 | }; | |
117 | ||
7bbda04c | 118 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) |
05330448 | 119 | { |
7bbda04c | 120 | KVMState *s = kvm_state; |
05330448 AL |
121 | int i; |
122 | ||
fb541ca5 | 123 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c PB |
124 | if (kml->slots[i].memory_size == 0) { |
125 | return &kml->slots[i]; | |
a426e122 | 126 | } |
05330448 AL |
127 | } |
128 | ||
b8865591 IM |
129 | return NULL; |
130 | } | |
131 | ||
132 | bool kvm_has_free_slot(MachineState *ms) | |
133 | { | |
7bbda04c PB |
134 | KVMState *s = KVM_STATE(ms->accelerator); |
135 | ||
136 | return kvm_get_free_slot(&s->memory_listener); | |
b8865591 IM |
137 | } |
138 | ||
7bbda04c | 139 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) |
b8865591 | 140 | { |
7bbda04c | 141 | KVMSlot *slot = kvm_get_free_slot(kml); |
b8865591 IM |
142 | |
143 | if (slot) { | |
144 | return slot; | |
145 | } | |
146 | ||
d3f8d37f AL |
147 | fprintf(stderr, "%s: no free slot available\n", __func__); |
148 | abort(); | |
149 | } | |
150 | ||
7bbda04c | 151 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, |
a8170e5e AK |
152 | hwaddr start_addr, |
153 | hwaddr end_addr) | |
d3f8d37f | 154 | { |
7bbda04c | 155 | KVMState *s = kvm_state; |
d3f8d37f AL |
156 | int i; |
157 | ||
fb541ca5 | 158 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 159 | KVMSlot *mem = &kml->slots[i]; |
d3f8d37f AL |
160 | |
161 | if (start_addr == mem->start_addr && | |
162 | end_addr == mem->start_addr + mem->memory_size) { | |
163 | return mem; | |
164 | } | |
165 | } | |
166 | ||
05330448 AL |
167 | return NULL; |
168 | } | |
169 | ||
6152e2ae AL |
170 | /* |
171 | * Find overlapping slot with lowest start address | |
172 | */ | |
7bbda04c | 173 | static KVMSlot *kvm_lookup_overlapping_slot(KVMMemoryListener *kml, |
a8170e5e AK |
174 | hwaddr start_addr, |
175 | hwaddr end_addr) | |
05330448 | 176 | { |
7bbda04c | 177 | KVMState *s = kvm_state; |
6152e2ae | 178 | KVMSlot *found = NULL; |
05330448 AL |
179 | int i; |
180 | ||
fb541ca5 | 181 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 182 | KVMSlot *mem = &kml->slots[i]; |
05330448 | 183 | |
6152e2ae AL |
184 | if (mem->memory_size == 0 || |
185 | (found && found->start_addr < mem->start_addr)) { | |
186 | continue; | |
187 | } | |
188 | ||
189 | if (end_addr > mem->start_addr && | |
190 | start_addr < mem->start_addr + mem->memory_size) { | |
191 | found = mem; | |
192 | } | |
05330448 AL |
193 | } |
194 | ||
6152e2ae | 195 | return found; |
05330448 AL |
196 | } |
197 | ||
9f213ed9 | 198 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 199 | hwaddr *phys_addr) |
983dfc3b | 200 | { |
7bbda04c | 201 | KVMMemoryListener *kml = &s->memory_listener; |
983dfc3b HY |
202 | int i; |
203 | ||
fb541ca5 | 204 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 205 | KVMSlot *mem = &kml->slots[i]; |
983dfc3b | 206 | |
9f213ed9 AK |
207 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
208 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
983dfc3b HY |
209 | return 1; |
210 | } | |
211 | } | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
7bbda04c | 216 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot) |
5832d1f2 | 217 | { |
7bbda04c | 218 | KVMState *s = kvm_state; |
5832d1f2 AL |
219 | struct kvm_userspace_memory_region mem; |
220 | ||
38bfe691 | 221 | mem.slot = slot->slot | (kml->as_id << 16); |
5832d1f2 | 222 | mem.guest_phys_addr = slot->start_addr; |
9f213ed9 | 223 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 224 | mem.flags = slot->flags; |
651eb0f4 XG |
225 | |
226 | if (slot->memory_size && mem.flags & KVM_MEM_READONLY) { | |
235e8982 JJ |
227 | /* Set the slot size to 0 before setting the slot to the desired |
228 | * value. This is needed based on KVM commit 75d61fbc. */ | |
229 | mem.memory_size = 0; | |
230 | kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
231 | } | |
232 | mem.memory_size = slot->memory_size; | |
5832d1f2 AL |
233 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
234 | } | |
235 | ||
504134d2 | 236 | int kvm_init_vcpu(CPUState *cpu) |
05330448 AL |
237 | { |
238 | KVMState *s = kvm_state; | |
239 | long mmap_size; | |
240 | int ret; | |
241 | ||
8c0d577e | 242 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 243 | |
b164e48e | 244 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)kvm_arch_vcpu_id(cpu)); |
05330448 | 245 | if (ret < 0) { |
8c0d577e | 246 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
247 | goto err; |
248 | } | |
249 | ||
8737c51c | 250 | cpu->kvm_fd = ret; |
a60f24b5 | 251 | cpu->kvm_state = s; |
20d695a9 | 252 | cpu->kvm_vcpu_dirty = true; |
05330448 AL |
253 | |
254 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
255 | if (mmap_size < 0) { | |
748a680b | 256 | ret = mmap_size; |
8c0d577e | 257 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
258 | goto err; |
259 | } | |
260 | ||
f7575c96 | 261 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 262 | cpu->kvm_fd, 0); |
f7575c96 | 263 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 264 | ret = -errno; |
8c0d577e | 265 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
266 | goto err; |
267 | } | |
268 | ||
a426e122 JK |
269 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
270 | s->coalesced_mmio_ring = | |
f7575c96 | 271 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 272 | } |
62a2744c | 273 | |
20d695a9 | 274 | ret = kvm_arch_init_vcpu(cpu); |
05330448 AL |
275 | err: |
276 | return ret; | |
277 | } | |
278 | ||
5832d1f2 AL |
279 | /* |
280 | * dirty pages logging control | |
281 | */ | |
25254bbc | 282 | |
d6ff5cbc | 283 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 284 | { |
d6ff5cbc | 285 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 286 | int flags = 0; |
d6ff5cbc AJ |
287 | |
288 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
289 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
290 | } | |
235e8982 JJ |
291 | if (readonly && kvm_readonly_mem_allowed) { |
292 | flags |= KVM_MEM_READONLY; | |
293 | } | |
294 | return flags; | |
25254bbc MT |
295 | } |
296 | ||
7bbda04c PB |
297 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
298 | MemoryRegion *mr) | |
5832d1f2 | 299 | { |
4495d6a7 JK |
300 | int old_flags; |
301 | ||
4495d6a7 | 302 | old_flags = mem->flags; |
d6ff5cbc | 303 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 304 | |
4495d6a7 | 305 | /* If nothing changed effectively, no need to issue ioctl */ |
d6ff5cbc | 306 | if (mem->flags == old_flags) { |
25254bbc | 307 | return 0; |
4495d6a7 JK |
308 | } |
309 | ||
7bbda04c | 310 | return kvm_set_user_memory_region(kml, mem); |
5832d1f2 AL |
311 | } |
312 | ||
7bbda04c PB |
313 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
314 | MemoryRegionSection *section) | |
25254bbc | 315 | { |
d6ff5cbc AJ |
316 | hwaddr phys_addr = section->offset_within_address_space; |
317 | ram_addr_t size = int128_get64(section->size); | |
7bbda04c | 318 | KVMSlot *mem = kvm_lookup_matching_slot(kml, phys_addr, phys_addr + size); |
25254bbc MT |
319 | |
320 | if (mem == NULL) { | |
ea8cb1a8 PB |
321 | return 0; |
322 | } else { | |
7bbda04c | 323 | return kvm_slot_update_flags(kml, mem, section->mr); |
25254bbc | 324 | } |
25254bbc MT |
325 | } |
326 | ||
a01672d3 | 327 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
328 | MemoryRegionSection *section, |
329 | int old, int new) | |
5832d1f2 | 330 | { |
7bbda04c | 331 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
332 | int r; |
333 | ||
b2dfd71c PB |
334 | if (old != 0) { |
335 | return; | |
336 | } | |
337 | ||
7bbda04c | 338 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
339 | if (r < 0) { |
340 | abort(); | |
341 | } | |
5832d1f2 AL |
342 | } |
343 | ||
a01672d3 | 344 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
345 | MemoryRegionSection *section, |
346 | int old, int new) | |
5832d1f2 | 347 | { |
7bbda04c | 348 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
349 | int r; |
350 | ||
b2dfd71c PB |
351 | if (new != 0) { |
352 | return; | |
353 | } | |
354 | ||
7bbda04c | 355 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
356 | if (r < 0) { |
357 | abort(); | |
358 | } | |
5832d1f2 AL |
359 | } |
360 | ||
8369e01c | 361 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
362 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
363 | unsigned long *bitmap) | |
96c1606b | 364 | { |
c9dd46fc | 365 | ram_addr_t start = section->offset_within_region + section->mr->ram_addr; |
5ff7fb77 JQ |
366 | ram_addr_t pages = int128_get64(section->size) / getpagesize(); |
367 | ||
368 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
8369e01c | 369 | return 0; |
96c1606b AG |
370 | } |
371 | ||
8369e01c MT |
372 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
373 | ||
5832d1f2 AL |
374 | /** |
375 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
fd4aa979 BS |
376 | * This function updates qemu's dirty bitmap using |
377 | * memory_region_set_dirty(). This means all bits are set | |
378 | * to dirty. | |
5832d1f2 | 379 | * |
d3f8d37f | 380 | * @start_add: start of logged region. |
5832d1f2 AL |
381 | * @end_addr: end of logged region. |
382 | */ | |
7bbda04c PB |
383 | static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
384 | MemoryRegionSection *section) | |
5832d1f2 AL |
385 | { |
386 | KVMState *s = kvm_state; | |
151f7749 | 387 | unsigned long size, allocated_size = 0; |
714f78c5 | 388 | struct kvm_dirty_log d = {}; |
151f7749 JK |
389 | KVMSlot *mem; |
390 | int ret = 0; | |
a8170e5e | 391 | hwaddr start_addr = section->offset_within_address_space; |
052e87b0 | 392 | hwaddr end_addr = start_addr + int128_get64(section->size); |
5832d1f2 | 393 | |
151f7749 JK |
394 | d.dirty_bitmap = NULL; |
395 | while (start_addr < end_addr) { | |
7bbda04c | 396 | mem = kvm_lookup_overlapping_slot(kml, start_addr, end_addr); |
151f7749 JK |
397 | if (mem == NULL) { |
398 | break; | |
399 | } | |
5832d1f2 | 400 | |
51b0c606 MT |
401 | /* XXX bad kernel interface alert |
402 | * For dirty bitmap, kernel allocates array of size aligned to | |
403 | * bits-per-long. But for case when the kernel is 64bits and | |
404 | * the userspace is 32bits, userspace can't align to the same | |
405 | * bits-per-long, since sizeof(long) is different between kernel | |
406 | * and user space. This way, userspace will provide buffer which | |
407 | * may be 4 bytes less than the kernel will use, resulting in | |
408 | * userspace memory corruption (which is not detectable by valgrind | |
409 | * too, in most cases). | |
410 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
411 | * a hope that sizeof(long) wont become >8 any time soon. | |
412 | */ | |
413 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
414 | /*HOST_LONG_BITS*/ 64) / 8; | |
151f7749 | 415 | if (!d.dirty_bitmap) { |
7267c094 | 416 | d.dirty_bitmap = g_malloc(size); |
151f7749 | 417 | } else if (size > allocated_size) { |
7267c094 | 418 | d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); |
151f7749 JK |
419 | } |
420 | allocated_size = size; | |
421 | memset(d.dirty_bitmap, 0, allocated_size); | |
5832d1f2 | 422 | |
38bfe691 | 423 | d.slot = mem->slot | (kml->as_id << 16); |
50212d63 | 424 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 425 | DPRINTF("ioctl failed %d\n", errno); |
151f7749 JK |
426 | ret = -1; |
427 | break; | |
428 | } | |
5832d1f2 | 429 | |
ffcde12f | 430 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); |
8369e01c | 431 | start_addr = mem->start_addr + mem->memory_size; |
5832d1f2 | 432 | } |
7267c094 | 433 | g_free(d.dirty_bitmap); |
151f7749 JK |
434 | |
435 | return ret; | |
5832d1f2 AL |
436 | } |
437 | ||
95d2994a AK |
438 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
439 | MemoryRegionSection *secion, | |
a8170e5e | 440 | hwaddr start, hwaddr size) |
f65ed4c1 | 441 | { |
f65ed4c1 AL |
442 | KVMState *s = kvm_state; |
443 | ||
444 | if (s->coalesced_mmio) { | |
445 | struct kvm_coalesced_mmio_zone zone; | |
446 | ||
447 | zone.addr = start; | |
448 | zone.size = size; | |
7e680753 | 449 | zone.pad = 0; |
f65ed4c1 | 450 | |
95d2994a | 451 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 452 | } |
f65ed4c1 AL |
453 | } |
454 | ||
95d2994a AK |
455 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
456 | MemoryRegionSection *secion, | |
a8170e5e | 457 | hwaddr start, hwaddr size) |
f65ed4c1 | 458 | { |
f65ed4c1 AL |
459 | KVMState *s = kvm_state; |
460 | ||
461 | if (s->coalesced_mmio) { | |
462 | struct kvm_coalesced_mmio_zone zone; | |
463 | ||
464 | zone.addr = start; | |
465 | zone.size = size; | |
7e680753 | 466 | zone.pad = 0; |
f65ed4c1 | 467 | |
95d2994a | 468 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 469 | } |
f65ed4c1 AL |
470 | } |
471 | ||
ad7b8b33 AL |
472 | int kvm_check_extension(KVMState *s, unsigned int extension) |
473 | { | |
474 | int ret; | |
475 | ||
476 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
477 | if (ret < 0) { | |
478 | ret = 0; | |
479 | } | |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
7d0a07fa AG |
484 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
485 | { | |
486 | int ret; | |
487 | ||
488 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
489 | if (ret < 0) { | |
490 | /* VM wide version not implemented, use global one instead */ | |
491 | ret = kvm_check_extension(s, extension); | |
492 | } | |
493 | ||
494 | return ret; | |
495 | } | |
496 | ||
b680c5ba GK |
497 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
498 | { | |
499 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
500 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
501 | * endianness, but the memory core hands them in target endianness. | |
502 | * For example, PPC is always treated as big-endian even if running | |
503 | * on KVM and on PPC64LE. Correct here. | |
504 | */ | |
505 | switch (size) { | |
506 | case 2: | |
507 | val = bswap16(val); | |
508 | break; | |
509 | case 4: | |
510 | val = bswap32(val); | |
511 | break; | |
512 | } | |
513 | #endif | |
514 | return val; | |
515 | } | |
516 | ||
584f2be7 | 517 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 518 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
519 | { |
520 | int ret; | |
03a96b83 TH |
521 | struct kvm_ioeventfd iofd = { |
522 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
523 | .addr = addr, | |
524 | .len = size, | |
525 | .flags = 0, | |
526 | .fd = fd, | |
527 | }; | |
500ffd4a MT |
528 | |
529 | if (!kvm_enabled()) { | |
530 | return -ENOSYS; | |
531 | } | |
532 | ||
41cb62c2 MT |
533 | if (datamatch) { |
534 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
535 | } | |
500ffd4a MT |
536 | if (!assign) { |
537 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
538 | } | |
539 | ||
540 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
541 | ||
542 | if (ret < 0) { | |
543 | return -errno; | |
544 | } | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
44c3f8f7 | 549 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 550 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
551 | { |
552 | struct kvm_ioeventfd kick = { | |
b680c5ba | 553 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 554 | .addr = addr, |
41cb62c2 | 555 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 556 | .len = size, |
500ffd4a MT |
557 | .fd = fd, |
558 | }; | |
559 | int r; | |
560 | if (!kvm_enabled()) { | |
561 | return -ENOSYS; | |
562 | } | |
41cb62c2 MT |
563 | if (datamatch) { |
564 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
565 | } | |
500ffd4a MT |
566 | if (!assign) { |
567 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
568 | } | |
569 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
570 | if (r < 0) { | |
571 | return r; | |
572 | } | |
573 | return 0; | |
574 | } | |
575 | ||
576 | ||
d2f2b8a7 SH |
577 | static int kvm_check_many_ioeventfds(void) |
578 | { | |
d0dcac83 SH |
579 | /* Userspace can use ioeventfd for io notification. This requires a host |
580 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
581 | * support SIGIO it cannot interrupt the vcpu. | |
582 | * | |
583 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
584 | * can avoid creating too many ioeventfds. |
585 | */ | |
12d4536f | 586 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
587 | int ioeventfds[7]; |
588 | int i, ret = 0; | |
589 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
590 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
591 | if (ioeventfds[i] < 0) { | |
592 | break; | |
593 | } | |
41cb62c2 | 594 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
595 | if (ret < 0) { |
596 | close(ioeventfds[i]); | |
597 | break; | |
598 | } | |
599 | } | |
600 | ||
601 | /* Decide whether many devices are supported or not */ | |
602 | ret = i == ARRAY_SIZE(ioeventfds); | |
603 | ||
604 | while (i-- > 0) { | |
41cb62c2 | 605 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
606 | close(ioeventfds[i]); |
607 | } | |
608 | return ret; | |
609 | #else | |
610 | return 0; | |
611 | #endif | |
612 | } | |
613 | ||
94a8d39a JK |
614 | static const KVMCapabilityInfo * |
615 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
616 | { | |
617 | while (list->name) { | |
618 | if (!kvm_check_extension(s, list->value)) { | |
619 | return list; | |
620 | } | |
621 | list++; | |
622 | } | |
623 | return NULL; | |
624 | } | |
625 | ||
7bbda04c PB |
626 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
627 | MemoryRegionSection *section, bool add) | |
46dbef6a MT |
628 | { |
629 | KVMState *s = kvm_state; | |
46dbef6a MT |
630 | KVMSlot *mem, old; |
631 | int err; | |
a01672d3 | 632 | MemoryRegion *mr = section->mr; |
235e8982 | 633 | bool writeable = !mr->readonly && !mr->rom_device; |
a8170e5e | 634 | hwaddr start_addr = section->offset_within_address_space; |
052e87b0 | 635 | ram_addr_t size = int128_get64(section->size); |
9f213ed9 | 636 | void *ram = NULL; |
8f6f962b | 637 | unsigned delta; |
46dbef6a | 638 | |
14542fea | 639 | /* kvm works in page size chunks, but the function may be called |
f2a64032 AG |
640 | with sub-page size and unaligned start address. Pad the start |
641 | address to next and truncate size to previous page boundary. */ | |
642 | delta = (TARGET_PAGE_SIZE - (start_addr & ~TARGET_PAGE_MASK)); | |
643 | delta &= ~TARGET_PAGE_MASK; | |
8f6f962b AK |
644 | if (delta > size) { |
645 | return; | |
646 | } | |
647 | start_addr += delta; | |
648 | size -= delta; | |
649 | size &= TARGET_PAGE_MASK; | |
650 | if (!size || (start_addr & ~TARGET_PAGE_MASK)) { | |
651 | return; | |
652 | } | |
46dbef6a | 653 | |
a01672d3 | 654 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
655 | if (writeable || !kvm_readonly_mem_allowed) { |
656 | return; | |
657 | } else if (!mr->romd_mode) { | |
658 | /* If the memory device is not in romd_mode, then we actually want | |
659 | * to remove the kvm memory slot so all accesses will trap. */ | |
660 | add = false; | |
661 | } | |
9f213ed9 AK |
662 | } |
663 | ||
8f6f962b | 664 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; |
a01672d3 | 665 | |
46dbef6a | 666 | while (1) { |
7bbda04c | 667 | mem = kvm_lookup_overlapping_slot(kml, start_addr, start_addr + size); |
46dbef6a MT |
668 | if (!mem) { |
669 | break; | |
670 | } | |
671 | ||
a01672d3 | 672 | if (add && start_addr >= mem->start_addr && |
46dbef6a | 673 | (start_addr + size <= mem->start_addr + mem->memory_size) && |
9f213ed9 | 674 | (ram - start_addr == mem->ram - mem->start_addr)) { |
46dbef6a | 675 | /* The new slot fits into the existing one and comes with |
25254bbc | 676 | * identical parameters - update flags and done. */ |
7bbda04c | 677 | kvm_slot_update_flags(kml, mem, mr); |
46dbef6a MT |
678 | return; |
679 | } | |
680 | ||
681 | old = *mem; | |
682 | ||
1bfbac4e | 683 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
7bbda04c | 684 | kvm_physical_sync_dirty_bitmap(kml, section); |
3fbffb62 AK |
685 | } |
686 | ||
46dbef6a MT |
687 | /* unregister the overlapping slot */ |
688 | mem->memory_size = 0; | |
7bbda04c | 689 | err = kvm_set_user_memory_region(kml, mem); |
46dbef6a MT |
690 | if (err) { |
691 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
692 | __func__, strerror(-err)); | |
693 | abort(); | |
694 | } | |
695 | ||
696 | /* Workaround for older KVM versions: we can't join slots, even not by | |
697 | * unregistering the previous ones and then registering the larger | |
698 | * slot. We have to maintain the existing fragmentation. Sigh. | |
699 | * | |
700 | * This workaround assumes that the new slot starts at the same | |
701 | * address as the first existing one. If not or if some overlapping | |
702 | * slot comes around later, we will fail (not seen in practice so far) | |
703 | * - and actually require a recent KVM version. */ | |
704 | if (s->broken_set_mem_region && | |
a01672d3 | 705 | old.start_addr == start_addr && old.memory_size < size && add) { |
7bbda04c | 706 | mem = kvm_alloc_slot(kml); |
46dbef6a MT |
707 | mem->memory_size = old.memory_size; |
708 | mem->start_addr = old.start_addr; | |
9f213ed9 | 709 | mem->ram = old.ram; |
d6ff5cbc | 710 | mem->flags = kvm_mem_flags(mr); |
46dbef6a | 711 | |
7bbda04c | 712 | err = kvm_set_user_memory_region(kml, mem); |
46dbef6a MT |
713 | if (err) { |
714 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
715 | strerror(-err)); | |
716 | abort(); | |
717 | } | |
718 | ||
719 | start_addr += old.memory_size; | |
9f213ed9 | 720 | ram += old.memory_size; |
46dbef6a MT |
721 | size -= old.memory_size; |
722 | continue; | |
723 | } | |
724 | ||
725 | /* register prefix slot */ | |
726 | if (old.start_addr < start_addr) { | |
7bbda04c | 727 | mem = kvm_alloc_slot(kml); |
46dbef6a MT |
728 | mem->memory_size = start_addr - old.start_addr; |
729 | mem->start_addr = old.start_addr; | |
9f213ed9 | 730 | mem->ram = old.ram; |
d6ff5cbc | 731 | mem->flags = kvm_mem_flags(mr); |
46dbef6a | 732 | |
7bbda04c | 733 | err = kvm_set_user_memory_region(kml, mem); |
46dbef6a MT |
734 | if (err) { |
735 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
736 | __func__, strerror(-err)); | |
d4d6868f AG |
737 | #ifdef TARGET_PPC |
738 | fprintf(stderr, "%s: This is probably because your kernel's " \ | |
739 | "PAGE_SIZE is too big. Please try to use 4k " \ | |
740 | "PAGE_SIZE!\n", __func__); | |
741 | #endif | |
46dbef6a MT |
742 | abort(); |
743 | } | |
744 | } | |
745 | ||
746 | /* register suffix slot */ | |
747 | if (old.start_addr + old.memory_size > start_addr + size) { | |
748 | ram_addr_t size_delta; | |
749 | ||
7bbda04c | 750 | mem = kvm_alloc_slot(kml); |
46dbef6a MT |
751 | mem->start_addr = start_addr + size; |
752 | size_delta = mem->start_addr - old.start_addr; | |
753 | mem->memory_size = old.memory_size - size_delta; | |
9f213ed9 | 754 | mem->ram = old.ram + size_delta; |
d6ff5cbc | 755 | mem->flags = kvm_mem_flags(mr); |
46dbef6a | 756 | |
7bbda04c | 757 | err = kvm_set_user_memory_region(kml, mem); |
46dbef6a MT |
758 | if (err) { |
759 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
760 | __func__, strerror(-err)); | |
761 | abort(); | |
762 | } | |
763 | } | |
764 | } | |
765 | ||
766 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
a426e122 | 767 | if (!size) { |
46dbef6a | 768 | return; |
a426e122 | 769 | } |
a01672d3 | 770 | if (!add) { |
46dbef6a | 771 | return; |
a426e122 | 772 | } |
7bbda04c | 773 | mem = kvm_alloc_slot(kml); |
46dbef6a MT |
774 | mem->memory_size = size; |
775 | mem->start_addr = start_addr; | |
9f213ed9 | 776 | mem->ram = ram; |
d6ff5cbc | 777 | mem->flags = kvm_mem_flags(mr); |
46dbef6a | 778 | |
7bbda04c | 779 | err = kvm_set_user_memory_region(kml, mem); |
46dbef6a MT |
780 | if (err) { |
781 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
782 | strerror(-err)); | |
783 | abort(); | |
784 | } | |
785 | } | |
786 | ||
a01672d3 AK |
787 | static void kvm_region_add(MemoryListener *listener, |
788 | MemoryRegionSection *section) | |
789 | { | |
7bbda04c PB |
790 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
791 | ||
dfde4e6e | 792 | memory_region_ref(section->mr); |
7bbda04c | 793 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
794 | } |
795 | ||
796 | static void kvm_region_del(MemoryListener *listener, | |
797 | MemoryRegionSection *section) | |
798 | { | |
7bbda04c PB |
799 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
800 | ||
801 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 802 | memory_region_unref(section->mr); |
a01672d3 AK |
803 | } |
804 | ||
805 | static void kvm_log_sync(MemoryListener *listener, | |
806 | MemoryRegionSection *section) | |
7b8f3b78 | 807 | { |
7bbda04c | 808 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
809 | int r; |
810 | ||
7bbda04c | 811 | r = kvm_physical_sync_dirty_bitmap(kml, section); |
a01672d3 AK |
812 | if (r < 0) { |
813 | abort(); | |
814 | } | |
7b8f3b78 MT |
815 | } |
816 | ||
d22b096e AK |
817 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
818 | MemoryRegionSection *section, | |
819 | bool match_data, uint64_t data, | |
820 | EventNotifier *e) | |
821 | { | |
822 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
823 | int r; |
824 | ||
4b8f1c88 | 825 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
826 | data, true, int128_get64(section->size), |
827 | match_data); | |
80a1ea37 | 828 | if (r < 0) { |
fa4ba923 AK |
829 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", |
830 | __func__, strerror(-r)); | |
80a1ea37 AK |
831 | abort(); |
832 | } | |
833 | } | |
834 | ||
d22b096e AK |
835 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
836 | MemoryRegionSection *section, | |
837 | bool match_data, uint64_t data, | |
838 | EventNotifier *e) | |
80a1ea37 | 839 | { |
d22b096e | 840 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
841 | int r; |
842 | ||
4b8f1c88 | 843 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
844 | data, false, int128_get64(section->size), |
845 | match_data); | |
80a1ea37 AK |
846 | if (r < 0) { |
847 | abort(); | |
848 | } | |
849 | } | |
850 | ||
d22b096e AK |
851 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
852 | MemoryRegionSection *section, | |
853 | bool match_data, uint64_t data, | |
854 | EventNotifier *e) | |
80a1ea37 | 855 | { |
d22b096e | 856 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
857 | int r; |
858 | ||
44c3f8f7 | 859 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
860 | data, true, int128_get64(section->size), |
861 | match_data); | |
80a1ea37 | 862 | if (r < 0) { |
fa4ba923 AK |
863 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", |
864 | __func__, strerror(-r)); | |
80a1ea37 AK |
865 | abort(); |
866 | } | |
867 | } | |
868 | ||
d22b096e AK |
869 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
870 | MemoryRegionSection *section, | |
871 | bool match_data, uint64_t data, | |
872 | EventNotifier *e) | |
80a1ea37 AK |
873 | |
874 | { | |
d22b096e | 875 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
876 | int r; |
877 | ||
44c3f8f7 | 878 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
879 | data, false, int128_get64(section->size), |
880 | match_data); | |
80a1ea37 AK |
881 | if (r < 0) { |
882 | abort(); | |
883 | } | |
884 | } | |
885 | ||
38bfe691 PB |
886 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
887 | AddressSpace *as, int as_id) | |
7bbda04c PB |
888 | { |
889 | int i; | |
890 | ||
891 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
38bfe691 | 892 | kml->as_id = as_id; |
7bbda04c PB |
893 | |
894 | for (i = 0; i < s->nr_slots; i++) { | |
895 | kml->slots[i].slot = i; | |
896 | } | |
897 | ||
898 | kml->listener.region_add = kvm_region_add; | |
899 | kml->listener.region_del = kvm_region_del; | |
900 | kml->listener.log_start = kvm_log_start; | |
901 | kml->listener.log_stop = kvm_log_stop; | |
902 | kml->listener.log_sync = kvm_log_sync; | |
903 | kml->listener.priority = 10; | |
904 | ||
905 | memory_listener_register(&kml->listener, as); | |
906 | } | |
d22b096e AK |
907 | |
908 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
909 | .eventfd_add = kvm_io_ioeventfd_add, |
910 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 911 | .priority = 10, |
7b8f3b78 MT |
912 | }; |
913 | ||
c3affe56 | 914 | static void kvm_handle_interrupt(CPUState *cpu, int mask) |
aa7f74d1 | 915 | { |
259186a7 | 916 | cpu->interrupt_request |= mask; |
aa7f74d1 | 917 | |
60e82579 | 918 | if (!qemu_cpu_is_self(cpu)) { |
c08d7424 | 919 | qemu_cpu_kick(cpu); |
aa7f74d1 JK |
920 | } |
921 | } | |
922 | ||
3889c3fa | 923 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
924 | { |
925 | struct kvm_irq_level event; | |
926 | int ret; | |
927 | ||
7ae26bd4 | 928 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
929 | |
930 | event.level = level; | |
931 | event.irq = irq; | |
e333cd69 | 932 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 933 | if (ret < 0) { |
3889c3fa | 934 | perror("kvm_set_irq"); |
84b058d7 JK |
935 | abort(); |
936 | } | |
937 | ||
e333cd69 | 938 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
939 | } |
940 | ||
941 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
942 | typedef struct KVMMSIRoute { |
943 | struct kvm_irq_routing_entry kroute; | |
944 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
945 | } KVMMSIRoute; | |
946 | ||
84b058d7 JK |
947 | static void set_gsi(KVMState *s, unsigned int gsi) |
948 | { | |
84b058d7 JK |
949 | s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); |
950 | } | |
951 | ||
04fa27f5 JK |
952 | static void clear_gsi(KVMState *s, unsigned int gsi) |
953 | { | |
954 | s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32)); | |
955 | } | |
956 | ||
7b774593 | 957 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 958 | { |
04fa27f5 | 959 | int gsi_count, i; |
84b058d7 | 960 | |
00008418 | 961 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 JK |
962 | if (gsi_count > 0) { |
963 | unsigned int gsi_bits, i; | |
964 | ||
965 | /* Round up so we can search ints using ffs */ | |
bc8c6788 | 966 | gsi_bits = ALIGN(gsi_count, 32); |
84b058d7 | 967 | s->used_gsi_bitmap = g_malloc0(gsi_bits / 8); |
4e2e4e63 | 968 | s->gsi_count = gsi_count; |
84b058d7 JK |
969 | |
970 | /* Mark any over-allocated bits as already in use */ | |
971 | for (i = gsi_count; i < gsi_bits; i++) { | |
972 | set_gsi(s, i); | |
973 | } | |
974 | } | |
975 | ||
976 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
977 | s->nr_allocated_irq_routes = 0; | |
978 | ||
4a3adebb JK |
979 | if (!s->direct_msi) { |
980 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { | |
981 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
982 | } | |
04fa27f5 JK |
983 | } |
984 | ||
84b058d7 JK |
985 | kvm_arch_init_irq_routing(s); |
986 | } | |
987 | ||
cb925cf9 | 988 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
989 | { |
990 | int ret; | |
991 | ||
992 | s->irq_routes->flags = 0; | |
993 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); | |
994 | assert(ret == 0); | |
995 | } | |
996 | ||
84b058d7 JK |
997 | static void kvm_add_routing_entry(KVMState *s, |
998 | struct kvm_irq_routing_entry *entry) | |
999 | { | |
1000 | struct kvm_irq_routing_entry *new; | |
1001 | int n, size; | |
1002 | ||
1003 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1004 | n = s->nr_allocated_irq_routes * 2; | |
1005 | if (n < 64) { | |
1006 | n = 64; | |
1007 | } | |
1008 | size = sizeof(struct kvm_irq_routing); | |
1009 | size += n * sizeof(*new); | |
1010 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1011 | s->nr_allocated_irq_routes = n; | |
1012 | } | |
1013 | n = s->irq_routes->nr++; | |
1014 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1015 | |
1016 | *new = *entry; | |
84b058d7 JK |
1017 | |
1018 | set_gsi(s, entry->gsi); | |
1019 | } | |
1020 | ||
cc57407e JK |
1021 | static int kvm_update_routing_entry(KVMState *s, |
1022 | struct kvm_irq_routing_entry *new_entry) | |
1023 | { | |
1024 | struct kvm_irq_routing_entry *entry; | |
1025 | int n; | |
1026 | ||
1027 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1028 | entry = &s->irq_routes->entries[n]; | |
1029 | if (entry->gsi != new_entry->gsi) { | |
1030 | continue; | |
1031 | } | |
1032 | ||
40509f7f MT |
1033 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1034 | return 0; | |
1035 | } | |
1036 | ||
0fbc2074 | 1037 | *entry = *new_entry; |
cc57407e JK |
1038 | |
1039 | kvm_irqchip_commit_routes(s); | |
1040 | ||
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | return -ESRCH; | |
1045 | } | |
1046 | ||
1df186df | 1047 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1048 | { |
0fbc2074 | 1049 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1050 | |
4e2e4e63 JK |
1051 | assert(pin < s->gsi_count); |
1052 | ||
84b058d7 JK |
1053 | e.gsi = irq; |
1054 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1055 | e.flags = 0; | |
1056 | e.u.irqchip.irqchip = irqchip; | |
1057 | e.u.irqchip.pin = pin; | |
1058 | kvm_add_routing_entry(s, &e); | |
1059 | } | |
1060 | ||
1e2aa8be | 1061 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1062 | { |
1063 | struct kvm_irq_routing_entry *e; | |
1064 | int i; | |
1065 | ||
76fe21de AK |
1066 | if (kvm_gsi_direct_mapping()) { |
1067 | return; | |
1068 | } | |
1069 | ||
04fa27f5 JK |
1070 | for (i = 0; i < s->irq_routes->nr; i++) { |
1071 | e = &s->irq_routes->entries[i]; | |
1072 | if (e->gsi == virq) { | |
1073 | s->irq_routes->nr--; | |
1074 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1075 | } | |
1076 | } | |
1077 | clear_gsi(s, virq); | |
1078 | } | |
1079 | ||
1080 | static unsigned int kvm_hash_msi(uint32_t data) | |
1081 | { | |
1082 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1083 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1084 | return data & 0xff; | |
1085 | } | |
1086 | ||
1087 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1088 | { | |
1089 | KVMMSIRoute *route, *next; | |
1090 | unsigned int hash; | |
1091 | ||
1092 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1093 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1094 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1095 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1096 | g_free(route); | |
1097 | } | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | static int kvm_irqchip_get_virq(KVMState *s) | |
1102 | { | |
1103 | uint32_t *word = s->used_gsi_bitmap; | |
1104 | int max_words = ALIGN(s->gsi_count, 32) / 32; | |
bd2a8884 | 1105 | int i, zeroes; |
04fa27f5 | 1106 | |
bdf02631 WM |
1107 | /* |
1108 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1109 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1110 | * number can succeed even though a new route entry cannot be added. | |
1111 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1112 | */ | |
1113 | if (!s->direct_msi && s->irq_routes->nr == s->gsi_count) { | |
1114 | kvm_flush_dynamic_msi_routes(s); | |
1115 | } | |
1116 | ||
04fa27f5 JK |
1117 | /* Return the lowest unused GSI in the bitmap */ |
1118 | for (i = 0; i < max_words; i++) { | |
bd2a8884 SH |
1119 | zeroes = ctz32(~word[i]); |
1120 | if (zeroes == 32) { | |
04fa27f5 JK |
1121 | continue; |
1122 | } | |
1123 | ||
bd2a8884 | 1124 | return zeroes + i * 32; |
04fa27f5 | 1125 | } |
04fa27f5 JK |
1126 | return -ENOSPC; |
1127 | ||
1128 | } | |
1129 | ||
1130 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1131 | { | |
1132 | unsigned int hash = kvm_hash_msi(msg.data); | |
1133 | KVMMSIRoute *route; | |
1134 | ||
1135 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1136 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1137 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1138 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1139 | return route; |
1140 | } | |
1141 | } | |
1142 | return NULL; | |
1143 | } | |
1144 | ||
1145 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1146 | { | |
4a3adebb | 1147 | struct kvm_msi msi; |
04fa27f5 JK |
1148 | KVMMSIRoute *route; |
1149 | ||
4a3adebb JK |
1150 | if (s->direct_msi) { |
1151 | msi.address_lo = (uint32_t)msg.address; | |
1152 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1153 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1154 | msi.flags = 0; |
1155 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1156 | ||
1157 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1158 | } | |
1159 | ||
04fa27f5 JK |
1160 | route = kvm_lookup_msi_route(s, msg); |
1161 | if (!route) { | |
e7b20308 | 1162 | int virq; |
04fa27f5 JK |
1163 | |
1164 | virq = kvm_irqchip_get_virq(s); | |
1165 | if (virq < 0) { | |
1166 | return virq; | |
1167 | } | |
1168 | ||
0fbc2074 | 1169 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1170 | route->kroute.gsi = virq; |
1171 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1172 | route->kroute.flags = 0; | |
1173 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1174 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1175 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1176 | |
1177 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1178 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1179 | |
1180 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1181 | entry); | |
04fa27f5 JK |
1182 | } |
1183 | ||
1184 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1185 | ||
3889c3fa | 1186 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1187 | } |
1188 | ||
92b4e489 JK |
1189 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) |
1190 | { | |
0fbc2074 | 1191 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 JK |
1192 | int virq; |
1193 | ||
76fe21de | 1194 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1195 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1196 | } |
1197 | ||
f3e1bed8 | 1198 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1199 | return -ENOSYS; |
1200 | } | |
1201 | ||
1202 | virq = kvm_irqchip_get_virq(s); | |
1203 | if (virq < 0) { | |
1204 | return virq; | |
1205 | } | |
1206 | ||
1207 | kroute.gsi = virq; | |
1208 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1209 | kroute.flags = 0; | |
1210 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1211 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1212 | kroute.u.msi.data = le32_to_cpu(msg.data); |
9e03a040 FB |
1213 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data)) { |
1214 | kvm_irqchip_release_virq(s, virq); | |
1215 | return -EINVAL; | |
1216 | } | |
92b4e489 JK |
1217 | |
1218 | kvm_add_routing_entry(s, &kroute); | |
cb925cf9 | 1219 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1220 | |
1221 | return virq; | |
1222 | } | |
1223 | ||
cc57407e JK |
1224 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) |
1225 | { | |
0fbc2074 | 1226 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 1227 | |
76fe21de AK |
1228 | if (kvm_gsi_direct_mapping()) { |
1229 | return 0; | |
1230 | } | |
1231 | ||
cc57407e JK |
1232 | if (!kvm_irqchip_in_kernel()) { |
1233 | return -ENOSYS; | |
1234 | } | |
1235 | ||
1236 | kroute.gsi = virq; | |
1237 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1238 | kroute.flags = 0; | |
1239 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1240 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1241 | kroute.u.msi.data = le32_to_cpu(msg.data); |
9e03a040 FB |
1242 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data)) { |
1243 | return -EINVAL; | |
1244 | } | |
cc57407e JK |
1245 | |
1246 | return kvm_update_routing_entry(s, &kroute); | |
1247 | } | |
1248 | ||
ca916d37 VM |
1249 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, |
1250 | bool assign) | |
39853bbc JK |
1251 | { |
1252 | struct kvm_irqfd irqfd = { | |
1253 | .fd = fd, | |
1254 | .gsi = virq, | |
1255 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1256 | }; | |
1257 | ||
ca916d37 VM |
1258 | if (rfd != -1) { |
1259 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1260 | irqfd.resamplefd = rfd; | |
1261 | } | |
1262 | ||
cc7e0ddf | 1263 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1264 | return -ENOSYS; |
1265 | } | |
1266 | ||
1267 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1268 | } | |
1269 | ||
d426d9fb CH |
1270 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1271 | { | |
e9af2fef | 1272 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
1273 | int virq; |
1274 | ||
1275 | if (!kvm_gsi_routing_enabled()) { | |
1276 | return -ENOSYS; | |
1277 | } | |
1278 | ||
1279 | virq = kvm_irqchip_get_virq(s); | |
1280 | if (virq < 0) { | |
1281 | return virq; | |
1282 | } | |
1283 | ||
1284 | kroute.gsi = virq; | |
1285 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1286 | kroute.flags = 0; | |
1287 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1288 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1289 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1290 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1291 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1292 | ||
1293 | kvm_add_routing_entry(s, &kroute); | |
1294 | kvm_irqchip_commit_routes(s); | |
1295 | ||
1296 | return virq; | |
1297 | } | |
1298 | ||
84b058d7 JK |
1299 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1300 | ||
7b774593 | 1301 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
1302 | { |
1303 | } | |
04fa27f5 | 1304 | |
d3d3bef0 JK |
1305 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1306 | { | |
1307 | } | |
1308 | ||
04fa27f5 JK |
1309 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1310 | { | |
1311 | abort(); | |
1312 | } | |
92b4e489 JK |
1313 | |
1314 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) | |
1315 | { | |
df410675 | 1316 | return -ENOSYS; |
92b4e489 | 1317 | } |
39853bbc | 1318 | |
d426d9fb CH |
1319 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1320 | { | |
1321 | return -ENOSYS; | |
1322 | } | |
1323 | ||
39853bbc JK |
1324 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) |
1325 | { | |
1326 | abort(); | |
1327 | } | |
dabe3143 MT |
1328 | |
1329 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1330 | { | |
1331 | return -ENOSYS; | |
1332 | } | |
84b058d7 JK |
1333 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1334 | ||
ca916d37 VM |
1335 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
1336 | EventNotifier *rn, int virq) | |
39853bbc | 1337 | { |
ca916d37 VM |
1338 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), |
1339 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
39853bbc JK |
1340 | } |
1341 | ||
b131c74a | 1342 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq) |
15b2bd18 | 1343 | { |
ca916d37 VM |
1344 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, |
1345 | false); | |
15b2bd18 PB |
1346 | } |
1347 | ||
446f16a6 | 1348 | static int kvm_irqchip_create(MachineState *machine, KVMState *s) |
84b058d7 | 1349 | { |
84b058d7 JK |
1350 | int ret; |
1351 | ||
446f16a6 | 1352 | if (!machine_kernel_irqchip_allowed(machine) || |
d426d9fb CH |
1353 | (!kvm_check_extension(s, KVM_CAP_IRQCHIP) && |
1354 | (kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0) < 0))) { | |
84b058d7 JK |
1355 | return 0; |
1356 | } | |
1357 | ||
d6032e06 CD |
1358 | /* First probe and see if there's a arch-specific hook to create the |
1359 | * in-kernel irqchip for us */ | |
1360 | ret = kvm_arch_irqchip_create(s); | |
84b058d7 | 1361 | if (ret < 0) { |
84b058d7 | 1362 | return ret; |
d6032e06 CD |
1363 | } else if (ret == 0) { |
1364 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1365 | if (ret < 0) { | |
1366 | fprintf(stderr, "Create kernel irqchip failed\n"); | |
1367 | return ret; | |
1368 | } | |
84b058d7 JK |
1369 | } |
1370 | ||
3d4b2649 | 1371 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1372 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1373 | * interrupt delivery (though the reverse is not necessarily true) | |
1374 | */ | |
1375 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 1376 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
1377 | |
1378 | kvm_init_irq_routing(s); | |
1379 | ||
1380 | return 0; | |
1381 | } | |
1382 | ||
670436ce AJ |
1383 | /* Find number of supported CPUs using the recommended |
1384 | * procedure from the kernel API documentation to cope with | |
1385 | * older kernels that may be missing capabilities. | |
1386 | */ | |
1387 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 1388 | { |
670436ce AJ |
1389 | int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); |
1390 | return (ret) ? ret : 4; | |
1391 | } | |
3ed444e9 | 1392 | |
670436ce AJ |
1393 | static int kvm_max_vcpus(KVMState *s) |
1394 | { | |
1395 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1396 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
1397 | } |
1398 | ||
f6a1ef64 | 1399 | static int kvm_init(MachineState *ms) |
05330448 | 1400 | { |
f6a1ef64 | 1401 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
1402 | static const char upgrade_note[] = |
1403 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1404 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
1405 | struct { |
1406 | const char *name; | |
1407 | int num; | |
1408 | } num_cpus[] = { | |
1409 | { "SMP", smp_cpus }, | |
1410 | { "hotpluggable", max_cpus }, | |
1411 | { NULL, } | |
1412 | }, *nc = num_cpus; | |
1413 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 1414 | KVMState *s; |
94a8d39a | 1415 | const KVMCapabilityInfo *missing_cap; |
05330448 | 1416 | int ret; |
7bbda04c | 1417 | int type = 0; |
135a129a | 1418 | const char *kvm_type; |
05330448 | 1419 | |
fc02086b | 1420 | s = KVM_STATE(ms->accelerator); |
05330448 | 1421 | |
3145fcb6 DG |
1422 | /* |
1423 | * On systems where the kernel can support different base page | |
1424 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1425 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1426 | * page size for the system though. | |
1427 | */ | |
1428 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
47c16ed5 | 1429 | page_size_init(); |
3145fcb6 | 1430 | |
aed6efb9 JH |
1431 | s->sigmask_len = 8; |
1432 | ||
e22a25c9 | 1433 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 1434 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 1435 | #endif |
05330448 | 1436 | s->vmfd = -1; |
40ff6d7e | 1437 | s->fd = qemu_open("/dev/kvm", O_RDWR); |
05330448 AL |
1438 | if (s->fd == -1) { |
1439 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1440 | ret = -errno; | |
1441 | goto err; | |
1442 | } | |
1443 | ||
1444 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1445 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 1446 | if (ret >= 0) { |
05330448 | 1447 | ret = -EINVAL; |
a426e122 | 1448 | } |
05330448 AL |
1449 | fprintf(stderr, "kvm version too old\n"); |
1450 | goto err; | |
1451 | } | |
1452 | ||
1453 | if (ret > KVM_API_VERSION) { | |
1454 | ret = -EINVAL; | |
1455 | fprintf(stderr, "kvm version not supported\n"); | |
1456 | goto err; | |
1457 | } | |
1458 | ||
fb541ca5 AW |
1459 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
1460 | ||
1461 | /* If unspecified, use the default value */ | |
1462 | if (!s->nr_slots) { | |
1463 | s->nr_slots = 32; | |
1464 | } | |
1465 | ||
670436ce AJ |
1466 | /* check the vcpu limits */ |
1467 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
1468 | hard_vcpus_limit = kvm_max_vcpus(s); | |
3ed444e9 | 1469 | |
670436ce AJ |
1470 | while (nc->name) { |
1471 | if (nc->num > soft_vcpus_limit) { | |
1472 | fprintf(stderr, | |
1473 | "Warning: Number of %s cpus requested (%d) exceeds " | |
1474 | "the recommended cpus supported by KVM (%d)\n", | |
1475 | nc->name, nc->num, soft_vcpus_limit); | |
1476 | ||
1477 | if (nc->num > hard_vcpus_limit) { | |
670436ce AJ |
1478 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " |
1479 | "the maximum cpus supported by KVM (%d)\n", | |
1480 | nc->name, nc->num, hard_vcpus_limit); | |
9ba3cf54 | 1481 | exit(1); |
670436ce AJ |
1482 | } |
1483 | } | |
1484 | nc++; | |
7dc52526 MT |
1485 | } |
1486 | ||
135a129a | 1487 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); |
f1e29879 MA |
1488 | if (mc->kvm_type) { |
1489 | type = mc->kvm_type(kvm_type); | |
135a129a | 1490 | } else if (kvm_type) { |
0e1dac6c | 1491 | ret = -EINVAL; |
135a129a AK |
1492 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); |
1493 | goto err; | |
1494 | } | |
1495 | ||
94ccff13 | 1496 | do { |
135a129a | 1497 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
1498 | } while (ret == -EINTR); |
1499 | ||
1500 | if (ret < 0) { | |
521f438e | 1501 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
1502 | strerror(-ret)); |
1503 | ||
0104dcac | 1504 | #ifdef TARGET_S390X |
2c80e996 CH |
1505 | if (ret == -EINVAL) { |
1506 | fprintf(stderr, | |
1507 | "Host kernel setup problem detected. Please verify:\n"); | |
1508 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
1509 | " user_mode parameters, whether\n"); | |
1510 | fprintf(stderr, | |
1511 | " user space is running in primary address space\n"); | |
1512 | fprintf(stderr, | |
1513 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
1514 | "whether it is enabled\n"); | |
1515 | } | |
0104dcac | 1516 | #endif |
05330448 | 1517 | goto err; |
0104dcac | 1518 | } |
05330448 | 1519 | |
94ccff13 | 1520 | s->vmfd = ret; |
94a8d39a JK |
1521 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
1522 | if (!missing_cap) { | |
1523 | missing_cap = | |
1524 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 1525 | } |
94a8d39a | 1526 | if (missing_cap) { |
ad7b8b33 | 1527 | ret = -EINVAL; |
94a8d39a JK |
1528 | fprintf(stderr, "kvm does not support %s\n%s", |
1529 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
1530 | goto err; |
1531 | } | |
1532 | ||
ad7b8b33 | 1533 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
f65ed4c1 | 1534 | |
e69917e2 | 1535 | s->broken_set_mem_region = 1; |
14a09518 | 1536 | ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
e69917e2 JK |
1537 | if (ret > 0) { |
1538 | s->broken_set_mem_region = 0; | |
1539 | } | |
e69917e2 | 1540 | |
a0fb002c JK |
1541 | #ifdef KVM_CAP_VCPU_EVENTS |
1542 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1543 | #endif | |
1544 | ||
b0b1d690 JK |
1545 | s->robust_singlestep = |
1546 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 1547 | |
ff44f1a3 JK |
1548 | #ifdef KVM_CAP_DEBUGREGS |
1549 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1550 | #endif | |
1551 | ||
f1665b21 SY |
1552 | #ifdef KVM_CAP_XSAVE |
1553 | s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); | |
1554 | #endif | |
1555 | ||
f1665b21 SY |
1556 | #ifdef KVM_CAP_XCRS |
1557 | s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); | |
1558 | #endif | |
1559 | ||
8a7c7393 JK |
1560 | #ifdef KVM_CAP_PIT_STATE2 |
1561 | s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2); | |
1562 | #endif | |
1563 | ||
d3d3bef0 | 1564 | #ifdef KVM_CAP_IRQ_ROUTING |
4a3adebb | 1565 | s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 1566 | #endif |
4a3adebb | 1567 | |
3ab73842 JK |
1568 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
1569 | ||
e333cd69 | 1570 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 1571 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 1572 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
1573 | } |
1574 | ||
df9c8b75 JJ |
1575 | #ifdef KVM_CAP_READONLY_MEM |
1576 | kvm_readonly_mem_allowed = | |
1577 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
1578 | #endif | |
1579 | ||
69e03ae6 NN |
1580 | kvm_eventfds_allowed = |
1581 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
1582 | ||
f41389ae EA |
1583 | kvm_irqfds_allowed = |
1584 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
1585 | ||
1586 | kvm_resamplefds_allowed = | |
1587 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
1588 | ||
d0a073a1 DD |
1589 | kvm_vm_attributes_allowed = |
1590 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
1591 | ||
b16565b3 | 1592 | ret = kvm_arch_init(ms, s); |
a426e122 | 1593 | if (ret < 0) { |
05330448 | 1594 | goto err; |
a426e122 | 1595 | } |
05330448 | 1596 | |
446f16a6 | 1597 | ret = kvm_irqchip_create(ms, s); |
84b058d7 JK |
1598 | if (ret < 0) { |
1599 | goto err; | |
1600 | } | |
1601 | ||
05330448 | 1602 | kvm_state = s; |
7bbda04c PB |
1603 | |
1604 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
1605 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
1606 | s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region; | |
1607 | s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region; | |
1608 | ||
1609 | kvm_memory_listener_register(s, &s->memory_listener, | |
38bfe691 | 1610 | &address_space_memory, 0); |
7bbda04c PB |
1611 | memory_listener_register(&kvm_io_listener, |
1612 | &address_space_io); | |
05330448 | 1613 | |
d2f2b8a7 SH |
1614 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
1615 | ||
aa7f74d1 JK |
1616 | cpu_interrupt_handler = kvm_handle_interrupt; |
1617 | ||
05330448 AL |
1618 | return 0; |
1619 | ||
1620 | err: | |
0e1dac6c | 1621 | assert(ret < 0); |
6d1cc321 SW |
1622 | if (s->vmfd >= 0) { |
1623 | close(s->vmfd); | |
1624 | } | |
1625 | if (s->fd != -1) { | |
1626 | close(s->fd); | |
05330448 | 1627 | } |
7bbda04c | 1628 | g_free(s->memory_listener.slots); |
05330448 AL |
1629 | |
1630 | return ret; | |
1631 | } | |
1632 | ||
aed6efb9 JH |
1633 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
1634 | { | |
1635 | s->sigmask_len = sigmask_len; | |
1636 | } | |
1637 | ||
4c663752 PB |
1638 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
1639 | int size, uint32_t count) | |
05330448 AL |
1640 | { |
1641 | int i; | |
1642 | uint8_t *ptr = data; | |
1643 | ||
1644 | for (i = 0; i < count; i++) { | |
4c663752 | 1645 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 1646 | ptr, size, |
354678c5 | 1647 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
1648 | ptr += size; |
1649 | } | |
05330448 AL |
1650 | } |
1651 | ||
5326ab55 | 1652 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 1653 | { |
977c7b6d RK |
1654 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
1655 | run->internal.suberror); | |
1656 | ||
7c80eef8 MT |
1657 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
1658 | int i; | |
1659 | ||
7c80eef8 MT |
1660 | for (i = 0; i < run->internal.ndata; ++i) { |
1661 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1662 | i, (uint64_t)run->internal.data[i]); | |
1663 | } | |
1664 | } | |
7c80eef8 MT |
1665 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
1666 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 1667 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
878096ee | 1668 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); |
d73cd8f4 | 1669 | return EXCP_INTERRUPT; |
a426e122 | 1670 | } |
7c80eef8 MT |
1671 | } |
1672 | /* FIXME: Should trigger a qmp message to let management know | |
1673 | * something went wrong. | |
1674 | */ | |
73aaec4a | 1675 | return -1; |
7c80eef8 | 1676 | } |
7c80eef8 | 1677 | |
62a2744c | 1678 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 1679 | { |
f65ed4c1 | 1680 | KVMState *s = kvm_state; |
1cae88b9 AK |
1681 | |
1682 | if (s->coalesced_flush_in_progress) { | |
1683 | return; | |
1684 | } | |
1685 | ||
1686 | s->coalesced_flush_in_progress = true; | |
1687 | ||
62a2744c SY |
1688 | if (s->coalesced_mmio_ring) { |
1689 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
1690 | while (ring->first != ring->last) { |
1691 | struct kvm_coalesced_mmio *ent; | |
1692 | ||
1693 | ent = &ring->coalesced_mmio[ring->first]; | |
1694 | ||
1695 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
85199474 | 1696 | smp_wmb(); |
f65ed4c1 AL |
1697 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
1698 | } | |
1699 | } | |
1cae88b9 AK |
1700 | |
1701 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
1702 | } |
1703 | ||
20d695a9 | 1704 | static void do_kvm_cpu_synchronize_state(void *arg) |
4c0960c0 | 1705 | { |
20d695a9 | 1706 | CPUState *cpu = arg; |
2705d56a | 1707 | |
20d695a9 AF |
1708 | if (!cpu->kvm_vcpu_dirty) { |
1709 | kvm_arch_get_registers(cpu); | |
1710 | cpu->kvm_vcpu_dirty = true; | |
4c0960c0 AK |
1711 | } |
1712 | } | |
1713 | ||
dd1750d7 | 1714 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 1715 | { |
20d695a9 AF |
1716 | if (!cpu->kvm_vcpu_dirty) { |
1717 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu); | |
a426e122 | 1718 | } |
2705d56a JK |
1719 | } |
1720 | ||
c8e2085d | 1721 | static void do_kvm_cpu_synchronize_post_reset(void *arg) |
ea375f9a | 1722 | { |
c8e2085d DH |
1723 | CPUState *cpu = arg; |
1724 | ||
20d695a9 AF |
1725 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
1726 | cpu->kvm_vcpu_dirty = false; | |
ea375f9a JK |
1727 | } |
1728 | ||
c8e2085d DH |
1729 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
1730 | { | |
1731 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, cpu); | |
1732 | } | |
1733 | ||
1734 | static void do_kvm_cpu_synchronize_post_init(void *arg) | |
ea375f9a | 1735 | { |
c8e2085d DH |
1736 | CPUState *cpu = arg; |
1737 | ||
20d695a9 AF |
1738 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
1739 | cpu->kvm_vcpu_dirty = false; | |
ea375f9a JK |
1740 | } |
1741 | ||
c8e2085d DH |
1742 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
1743 | { | |
1744 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, cpu); | |
1745 | } | |
1746 | ||
de9d61e8 MT |
1747 | void kvm_cpu_clean_state(CPUState *cpu) |
1748 | { | |
1749 | cpu->kvm_vcpu_dirty = false; | |
1750 | } | |
1751 | ||
1458c363 | 1752 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 1753 | { |
f7575c96 | 1754 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 1755 | int ret, run_ret; |
05330448 | 1756 | |
8c0d577e | 1757 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 1758 | |
20d695a9 | 1759 | if (kvm_arch_process_async_events(cpu)) { |
fcd7d003 | 1760 | cpu->exit_request = 0; |
6792a57b | 1761 | return EXCP_HLT; |
9ccfac9e | 1762 | } |
0af691d7 | 1763 | |
4b8523ee JK |
1764 | qemu_mutex_unlock_iothread(); |
1765 | ||
9ccfac9e | 1766 | do { |
4c663752 PB |
1767 | MemTxAttrs attrs; |
1768 | ||
20d695a9 AF |
1769 | if (cpu->kvm_vcpu_dirty) { |
1770 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); | |
1771 | cpu->kvm_vcpu_dirty = false; | |
4c0960c0 AK |
1772 | } |
1773 | ||
20d695a9 | 1774 | kvm_arch_pre_run(cpu, run); |
fcd7d003 | 1775 | if (cpu->exit_request) { |
9ccfac9e JK |
1776 | DPRINTF("interrupt exit requested\n"); |
1777 | /* | |
1778 | * KVM requires us to reenter the kernel after IO exits to complete | |
1779 | * instruction emulation. This self-signal will ensure that we | |
1780 | * leave ASAP again. | |
1781 | */ | |
1782 | qemu_cpu_kick_self(); | |
1783 | } | |
9ccfac9e | 1784 | |
1bc22652 | 1785 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 1786 | |
4c663752 | 1787 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 1788 | |
7cbb533f | 1789 | if (run_ret < 0) { |
dc77d341 JK |
1790 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
1791 | DPRINTF("io window exit\n"); | |
d73cd8f4 | 1792 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
1793 | break; |
1794 | } | |
7b011fbc ME |
1795 | fprintf(stderr, "error: kvm run failed %s\n", |
1796 | strerror(-run_ret)); | |
dae02ba5 LV |
1797 | #ifdef TARGET_PPC |
1798 | if (run_ret == -EBUSY) { | |
1799 | fprintf(stderr, | |
1800 | "This is probably because your SMT is enabled.\n" | |
1801 | "VCPU can only run on primary threads with all " | |
1802 | "secondary threads offline.\n"); | |
1803 | } | |
1804 | #endif | |
a85e130e PB |
1805 | ret = -1; |
1806 | break; | |
05330448 AL |
1807 | } |
1808 | ||
b76ac80a | 1809 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
1810 | switch (run->exit_reason) { |
1811 | case KVM_EXIT_IO: | |
8c0d577e | 1812 | DPRINTF("handle_io\n"); |
80b7d2ef | 1813 | /* Called outside BQL */ |
4c663752 | 1814 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
1815 | (uint8_t *)run + run->io.data_offset, |
1816 | run->io.direction, | |
1817 | run->io.size, | |
1818 | run->io.count); | |
d73cd8f4 | 1819 | ret = 0; |
05330448 AL |
1820 | break; |
1821 | case KVM_EXIT_MMIO: | |
8c0d577e | 1822 | DPRINTF("handle_mmio\n"); |
de7ea885 | 1823 | /* Called outside BQL */ |
4c663752 PB |
1824 | address_space_rw(&address_space_memory, |
1825 | run->mmio.phys_addr, attrs, | |
1826 | run->mmio.data, | |
1827 | run->mmio.len, | |
1828 | run->mmio.is_write); | |
d73cd8f4 | 1829 | ret = 0; |
05330448 AL |
1830 | break; |
1831 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 1832 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 1833 | ret = EXCP_INTERRUPT; |
05330448 AL |
1834 | break; |
1835 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 1836 | DPRINTF("shutdown\n"); |
05330448 | 1837 | qemu_system_reset_request(); |
d73cd8f4 | 1838 | ret = EXCP_INTERRUPT; |
05330448 AL |
1839 | break; |
1840 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
1841 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
1842 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 1843 | ret = -1; |
05330448 | 1844 | break; |
7c80eef8 | 1845 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 1846 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 1847 | break; |
99040447 PS |
1848 | case KVM_EXIT_SYSTEM_EVENT: |
1849 | switch (run->system_event.type) { | |
1850 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
1851 | qemu_system_shutdown_request(); | |
1852 | ret = EXCP_INTERRUPT; | |
1853 | break; | |
1854 | case KVM_SYSTEM_EVENT_RESET: | |
1855 | qemu_system_reset_request(); | |
1856 | ret = EXCP_INTERRUPT; | |
1857 | break; | |
1858 | default: | |
1859 | DPRINTF("kvm_arch_handle_exit\n"); | |
1860 | ret = kvm_arch_handle_exit(cpu, run); | |
1861 | break; | |
1862 | } | |
1863 | break; | |
05330448 | 1864 | default: |
8c0d577e | 1865 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 1866 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
1867 | break; |
1868 | } | |
d73cd8f4 | 1869 | } while (ret == 0); |
05330448 | 1870 | |
4b8523ee JK |
1871 | qemu_mutex_lock_iothread(); |
1872 | ||
73aaec4a | 1873 | if (ret < 0) { |
878096ee | 1874 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); |
0461d5a6 | 1875 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
1876 | } |
1877 | ||
fcd7d003 | 1878 | cpu->exit_request = 0; |
05330448 AL |
1879 | return ret; |
1880 | } | |
1881 | ||
984b5181 | 1882 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
1883 | { |
1884 | int ret; | |
984b5181 AL |
1885 | void *arg; |
1886 | va_list ap; | |
05330448 | 1887 | |
984b5181 AL |
1888 | va_start(ap, type); |
1889 | arg = va_arg(ap, void *); | |
1890 | va_end(ap); | |
1891 | ||
9c775729 | 1892 | trace_kvm_ioctl(type, arg); |
984b5181 | 1893 | ret = ioctl(s->fd, type, arg); |
a426e122 | 1894 | if (ret == -1) { |
05330448 | 1895 | ret = -errno; |
a426e122 | 1896 | } |
05330448 AL |
1897 | return ret; |
1898 | } | |
1899 | ||
984b5181 | 1900 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
1901 | { |
1902 | int ret; | |
984b5181 AL |
1903 | void *arg; |
1904 | va_list ap; | |
1905 | ||
1906 | va_start(ap, type); | |
1907 | arg = va_arg(ap, void *); | |
1908 | va_end(ap); | |
05330448 | 1909 | |
9c775729 | 1910 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 1911 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 1912 | if (ret == -1) { |
05330448 | 1913 | ret = -errno; |
a426e122 | 1914 | } |
05330448 AL |
1915 | return ret; |
1916 | } | |
1917 | ||
1bc22652 | 1918 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
1919 | { |
1920 | int ret; | |
984b5181 AL |
1921 | void *arg; |
1922 | va_list ap; | |
1923 | ||
1924 | va_start(ap, type); | |
1925 | arg = va_arg(ap, void *); | |
1926 | va_end(ap); | |
05330448 | 1927 | |
9c775729 | 1928 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 1929 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 1930 | if (ret == -1) { |
05330448 | 1931 | ret = -errno; |
a426e122 | 1932 | } |
05330448 AL |
1933 | return ret; |
1934 | } | |
bd322087 | 1935 | |
0a6a7cca CD |
1936 | int kvm_device_ioctl(int fd, int type, ...) |
1937 | { | |
1938 | int ret; | |
1939 | void *arg; | |
1940 | va_list ap; | |
1941 | ||
1942 | va_start(ap, type); | |
1943 | arg = va_arg(ap, void *); | |
1944 | va_end(ap); | |
1945 | ||
1946 | trace_kvm_device_ioctl(fd, type, arg); | |
1947 | ret = ioctl(fd, type, arg); | |
1948 | if (ret == -1) { | |
1949 | ret = -errno; | |
1950 | } | |
1951 | return ret; | |
1952 | } | |
1953 | ||
d0a073a1 DD |
1954 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
1955 | { | |
1956 | int ret; | |
1957 | struct kvm_device_attr attribute = { | |
1958 | .group = group, | |
1959 | .attr = attr, | |
1960 | }; | |
1961 | ||
1962 | if (!kvm_vm_attributes_allowed) { | |
1963 | return 0; | |
1964 | } | |
1965 | ||
1966 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
1967 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
1968 | return ret ? 0 : 1; | |
1969 | } | |
1970 | ||
bd322087 AL |
1971 | int kvm_has_sync_mmu(void) |
1972 | { | |
94a8d39a | 1973 | return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
bd322087 | 1974 | } |
e22a25c9 | 1975 | |
a0fb002c JK |
1976 | int kvm_has_vcpu_events(void) |
1977 | { | |
1978 | return kvm_state->vcpu_events; | |
1979 | } | |
1980 | ||
b0b1d690 JK |
1981 | int kvm_has_robust_singlestep(void) |
1982 | { | |
1983 | return kvm_state->robust_singlestep; | |
1984 | } | |
1985 | ||
ff44f1a3 JK |
1986 | int kvm_has_debugregs(void) |
1987 | { | |
1988 | return kvm_state->debugregs; | |
1989 | } | |
1990 | ||
f1665b21 SY |
1991 | int kvm_has_xsave(void) |
1992 | { | |
1993 | return kvm_state->xsave; | |
1994 | } | |
1995 | ||
1996 | int kvm_has_xcrs(void) | |
1997 | { | |
1998 | return kvm_state->xcrs; | |
1999 | } | |
2000 | ||
8a7c7393 JK |
2001 | int kvm_has_pit_state2(void) |
2002 | { | |
2003 | return kvm_state->pit_state2; | |
2004 | } | |
2005 | ||
d2f2b8a7 SH |
2006 | int kvm_has_many_ioeventfds(void) |
2007 | { | |
2008 | if (!kvm_enabled()) { | |
2009 | return 0; | |
2010 | } | |
2011 | return kvm_state->many_ioeventfds; | |
2012 | } | |
2013 | ||
84b058d7 JK |
2014 | int kvm_has_gsi_routing(void) |
2015 | { | |
a9c5eb0d | 2016 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 2017 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
2018 | #else |
2019 | return false; | |
2020 | #endif | |
84b058d7 JK |
2021 | } |
2022 | ||
3ab73842 JK |
2023 | int kvm_has_intx_set_mask(void) |
2024 | { | |
2025 | return kvm_state->intx_set_mask; | |
2026 | } | |
2027 | ||
6f0437e8 JK |
2028 | void kvm_setup_guest_memory(void *start, size_t size) |
2029 | { | |
2030 | if (!kvm_has_sync_mmu()) { | |
e78815a5 | 2031 | int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK); |
6f0437e8 JK |
2032 | |
2033 | if (ret) { | |
e78815a5 AF |
2034 | perror("qemu_madvise"); |
2035 | fprintf(stderr, | |
2036 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
6f0437e8 JK |
2037 | exit(1); |
2038 | } | |
6f0437e8 JK |
2039 | } |
2040 | } | |
2041 | ||
e22a25c9 | 2042 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 2043 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
2044 | target_ulong pc) |
2045 | { | |
2046 | struct kvm_sw_breakpoint *bp; | |
2047 | ||
a60f24b5 | 2048 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 2049 | if (bp->pc == pc) { |
e22a25c9 | 2050 | return bp; |
a426e122 | 2051 | } |
e22a25c9 AL |
2052 | } |
2053 | return NULL; | |
2054 | } | |
2055 | ||
a60f24b5 | 2056 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 2057 | { |
a60f24b5 | 2058 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
2059 | } |
2060 | ||
452e4751 GC |
2061 | struct kvm_set_guest_debug_data { |
2062 | struct kvm_guest_debug dbg; | |
a60f24b5 | 2063 | CPUState *cpu; |
452e4751 GC |
2064 | int err; |
2065 | }; | |
2066 | ||
2067 | static void kvm_invoke_set_guest_debug(void *data) | |
2068 | { | |
2069 | struct kvm_set_guest_debug_data *dbg_data = data; | |
b3807725 | 2070 | |
a60f24b5 AF |
2071 | dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG, |
2072 | &dbg_data->dbg); | |
452e4751 GC |
2073 | } |
2074 | ||
38e478ec | 2075 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 2076 | { |
452e4751 | 2077 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 2078 | |
b0b1d690 | 2079 | data.dbg.control = reinject_trap; |
e22a25c9 | 2080 | |
ed2803da | 2081 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
2082 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
2083 | } | |
20d695a9 | 2084 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
a60f24b5 | 2085 | data.cpu = cpu; |
e22a25c9 | 2086 | |
f100f0b3 | 2087 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data); |
452e4751 | 2088 | return data.err; |
e22a25c9 AL |
2089 | } |
2090 | ||
62278814 | 2091 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2092 | target_ulong len, int type) |
2093 | { | |
2094 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2095 | int err; |
2096 | ||
2097 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2098 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
2099 | if (bp) { |
2100 | bp->use_count++; | |
2101 | return 0; | |
2102 | } | |
2103 | ||
7267c094 | 2104 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
2105 | bp->pc = addr; |
2106 | bp->use_count = 1; | |
80b7cd73 | 2107 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 2108 | if (err) { |
7267c094 | 2109 | g_free(bp); |
e22a25c9 AL |
2110 | return err; |
2111 | } | |
2112 | ||
80b7cd73 | 2113 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
2114 | } else { |
2115 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 2116 | if (err) { |
e22a25c9 | 2117 | return err; |
a426e122 | 2118 | } |
e22a25c9 AL |
2119 | } |
2120 | ||
bdc44640 | 2121 | CPU_FOREACH(cpu) { |
38e478ec | 2122 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2123 | if (err) { |
e22a25c9 | 2124 | return err; |
a426e122 | 2125 | } |
e22a25c9 AL |
2126 | } |
2127 | return 0; | |
2128 | } | |
2129 | ||
62278814 | 2130 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2131 | target_ulong len, int type) |
2132 | { | |
2133 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2134 | int err; |
2135 | ||
2136 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2137 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 2138 | if (!bp) { |
e22a25c9 | 2139 | return -ENOENT; |
a426e122 | 2140 | } |
e22a25c9 AL |
2141 | |
2142 | if (bp->use_count > 1) { | |
2143 | bp->use_count--; | |
2144 | return 0; | |
2145 | } | |
2146 | ||
80b7cd73 | 2147 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 2148 | if (err) { |
e22a25c9 | 2149 | return err; |
a426e122 | 2150 | } |
e22a25c9 | 2151 | |
80b7cd73 | 2152 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 2153 | g_free(bp); |
e22a25c9 AL |
2154 | } else { |
2155 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 2156 | if (err) { |
e22a25c9 | 2157 | return err; |
a426e122 | 2158 | } |
e22a25c9 AL |
2159 | } |
2160 | ||
bdc44640 | 2161 | CPU_FOREACH(cpu) { |
38e478ec | 2162 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2163 | if (err) { |
e22a25c9 | 2164 | return err; |
a426e122 | 2165 | } |
e22a25c9 AL |
2166 | } |
2167 | return 0; | |
2168 | } | |
2169 | ||
1d5791f4 | 2170 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2171 | { |
2172 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 2173 | KVMState *s = cpu->kvm_state; |
dc54e252 | 2174 | CPUState *tmpcpu; |
e22a25c9 | 2175 | |
72cf2d4f | 2176 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 2177 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 2178 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
2179 | CPU_FOREACH(tmpcpu) { |
2180 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 2181 | break; |
a426e122 | 2182 | } |
e22a25c9 AL |
2183 | } |
2184 | } | |
78021d6d JK |
2185 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
2186 | g_free(bp); | |
e22a25c9 AL |
2187 | } |
2188 | kvm_arch_remove_all_hw_breakpoints(); | |
2189 | ||
bdc44640 | 2190 | CPU_FOREACH(cpu) { |
38e478ec | 2191 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 2192 | } |
e22a25c9 AL |
2193 | } |
2194 | ||
2195 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2196 | ||
38e478ec | 2197 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
2198 | { |
2199 | return -EINVAL; | |
2200 | } | |
2201 | ||
62278814 | 2202 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2203 | target_ulong len, int type) |
2204 | { | |
2205 | return -EINVAL; | |
2206 | } | |
2207 | ||
62278814 | 2208 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2209 | target_ulong len, int type) |
2210 | { | |
2211 | return -EINVAL; | |
2212 | } | |
2213 | ||
1d5791f4 | 2214 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2215 | { |
2216 | } | |
2217 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 2218 | |
491d6e80 | 2219 | int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 2220 | { |
aed6efb9 | 2221 | KVMState *s = kvm_state; |
cc84de95 MT |
2222 | struct kvm_signal_mask *sigmask; |
2223 | int r; | |
2224 | ||
a426e122 | 2225 | if (!sigset) { |
1bc22652 | 2226 | return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL); |
a426e122 | 2227 | } |
cc84de95 | 2228 | |
7267c094 | 2229 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 2230 | |
aed6efb9 | 2231 | sigmask->len = s->sigmask_len; |
cc84de95 | 2232 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 2233 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 2234 | g_free(sigmask); |
cc84de95 MT |
2235 | |
2236 | return r; | |
2237 | } | |
290adf38 | 2238 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 2239 | { |
20d695a9 | 2240 | return kvm_arch_on_sigbus_vcpu(cpu, code, addr); |
a1b87fe0 JK |
2241 | } |
2242 | ||
2243 | int kvm_on_sigbus(int code, void *addr) | |
2244 | { | |
2245 | return kvm_arch_on_sigbus(code, addr); | |
2246 | } | |
0a6a7cca CD |
2247 | |
2248 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2249 | { | |
2250 | int ret; | |
2251 | struct kvm_create_device create_dev; | |
2252 | ||
2253 | create_dev.type = type; | |
2254 | create_dev.fd = -1; | |
2255 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2256 | ||
2257 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2258 | return -ENOTSUP; | |
2259 | } | |
2260 | ||
2261 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2262 | if (ret) { | |
2263 | return ret; | |
2264 | } | |
2265 | ||
2266 | return test ? 0 : create_dev.fd; | |
2267 | } | |
ada4135f CH |
2268 | |
2269 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) | |
2270 | { | |
2271 | struct kvm_one_reg reg; | |
2272 | int r; | |
2273 | ||
2274 | reg.id = id; | |
2275 | reg.addr = (uintptr_t) source; | |
2276 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2277 | if (r) { | |
2278 | trace_kvm_failed_reg_set(id, strerror(r)); | |
2279 | } | |
2280 | return r; | |
2281 | } | |
2282 | ||
2283 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2284 | { | |
2285 | struct kvm_one_reg reg; | |
2286 | int r; | |
2287 | ||
2288 | reg.id = id; | |
2289 | reg.addr = (uintptr_t) target; | |
2290 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2291 | if (r) { | |
2292 | trace_kvm_failed_reg_get(id, strerror(r)); | |
2293 | } | |
2294 | return r; | |
2295 | } | |
782c3f29 EH |
2296 | |
2297 | static void kvm_accel_class_init(ObjectClass *oc, void *data) | |
2298 | { | |
2299 | AccelClass *ac = ACCEL_CLASS(oc); | |
2300 | ac->name = "KVM"; | |
0d15da8e | 2301 | ac->init_machine = kvm_init; |
782c3f29 EH |
2302 | ac->allowed = &kvm_allowed; |
2303 | } | |
2304 | ||
2305 | static const TypeInfo kvm_accel_type = { | |
2306 | .name = TYPE_KVM_ACCEL, | |
2307 | .parent = TYPE_ACCEL, | |
2308 | .class_init = kvm_accel_class_init, | |
fc02086b | 2309 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
2310 | }; |
2311 | ||
2312 | static void kvm_type_init(void) | |
2313 | { | |
2314 | type_register_static(&kvm_accel_type); | |
2315 | } | |
2316 | ||
2317 | type_init(kvm_type_init); |