vnc: ensure connection sharing/limits is always configured
[qemu.git] / kvm-all.c
blobef81ca532a1597aa376a6b46aa6ce2dc0b040b38
1 /*
2 * QEMU KVM support
4 * Copyright IBM, Corp. 2008
5 * Red Hat, Inc. 2008
7 * Authors:
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Glauber Costa <gcosta@redhat.com>
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.
16 #include "qemu/osdep.h"
17 #include <sys/ioctl.h>
19 #include <linux/kvm.h>
21 #include "qemu-common.h"
22 #include "qemu/atomic.h"
23 #include "qemu/option.h"
24 #include "qemu/config-file.h"
25 #include "qemu/error-report.h"
26 #include "hw/hw.h"
27 #include "hw/pci/msi.h"
28 #include "hw/pci/msix.h"
29 #include "hw/s390x/adapter.h"
30 #include "exec/gdbstub.h"
31 #include "sysemu/kvm_int.h"
32 #include "qemu/bswap.h"
33 #include "exec/memory.h"
34 #include "exec/ram_addr.h"
35 #include "exec/address-spaces.h"
36 #include "qemu/event_notifier.h"
37 #include "trace.h"
38 #include "hw/irq.h"
40 #include "hw/boards.h"
42 /* This check must be after config-host.h is included */
43 #ifdef CONFIG_EVENTFD
44 #include <sys/eventfd.h>
45 #endif
47 /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We
48 * need to use the real host PAGE_SIZE, as that's what KVM will use.
50 #define PAGE_SIZE getpagesize()
52 //#define DEBUG_KVM
54 #ifdef DEBUG_KVM
55 #define DPRINTF(fmt, ...) \
56 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
57 #else
58 #define DPRINTF(fmt, ...) \
59 do { } while (0)
60 #endif
62 #define KVM_MSI_HASHTAB_SIZE 256
64 struct KVMParkedVcpu {
65 unsigned long vcpu_id;
66 int kvm_fd;
67 QLIST_ENTRY(KVMParkedVcpu) node;
70 struct KVMState
72 AccelState parent_obj;
74 int nr_slots;
75 int fd;
76 int vmfd;
77 int coalesced_mmio;
78 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
79 bool coalesced_flush_in_progress;
80 int broken_set_mem_region;
81 int vcpu_events;
82 int robust_singlestep;
83 int debugregs;
84 #ifdef KVM_CAP_SET_GUEST_DEBUG
85 struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
86 #endif
87 int many_ioeventfds;
88 int intx_set_mask;
89 /* The man page (and posix) say ioctl numbers are signed int, but
90 * they're not. Linux, glibc and *BSD all treat ioctl numbers as
91 * unsigned, and treating them as signed here can break things */
92 unsigned irq_set_ioctl;
93 unsigned int sigmask_len;
94 GHashTable *gsimap;
95 #ifdef KVM_CAP_IRQ_ROUTING
96 struct kvm_irq_routing *irq_routes;
97 int nr_allocated_irq_routes;
98 unsigned long *used_gsi_bitmap;
99 unsigned int gsi_count;
100 QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE];
101 #endif
102 KVMMemoryListener memory_listener;
103 QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
106 KVMState *kvm_state;
107 bool kvm_kernel_irqchip;
108 bool kvm_split_irqchip;
109 bool kvm_async_interrupts_allowed;
110 bool kvm_halt_in_kernel_allowed;
111 bool kvm_eventfds_allowed;
112 bool kvm_irqfds_allowed;
113 bool kvm_resamplefds_allowed;
114 bool kvm_msi_via_irqfd_allowed;
115 bool kvm_gsi_routing_allowed;
116 bool kvm_gsi_direct_mapping;
117 bool kvm_allowed;
118 bool kvm_readonly_mem_allowed;
119 bool kvm_vm_attributes_allowed;
120 bool kvm_direct_msi_allowed;
121 bool kvm_ioeventfd_any_length_allowed;
123 static const KVMCapabilityInfo kvm_required_capabilites[] = {
124 KVM_CAP_INFO(USER_MEMORY),
125 KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS),
126 KVM_CAP_LAST_INFO
129 int kvm_get_max_memslots(void)
131 KVMState *s = KVM_STATE(current_machine->accelerator);
133 return s->nr_slots;
136 static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
138 KVMState *s = kvm_state;
139 int i;
141 for (i = 0; i < s->nr_slots; i++) {
142 if (kml->slots[i].memory_size == 0) {
143 return &kml->slots[i];
147 return NULL;
150 bool kvm_has_free_slot(MachineState *ms)
152 KVMState *s = KVM_STATE(ms->accelerator);
154 return kvm_get_free_slot(&s->memory_listener);
157 static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml)
159 KVMSlot *slot = kvm_get_free_slot(kml);
161 if (slot) {
162 return slot;
165 fprintf(stderr, "%s: no free slot available\n", __func__);
166 abort();
169 static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml,
170 hwaddr start_addr,
171 hwaddr end_addr)
173 KVMState *s = kvm_state;
174 int i;
176 for (i = 0; i < s->nr_slots; i++) {
177 KVMSlot *mem = &kml->slots[i];
179 if (start_addr == mem->start_addr &&
180 end_addr == mem->start_addr + mem->memory_size) {
181 return mem;
185 return NULL;
189 * Find overlapping slot with lowest start address
191 static KVMSlot *kvm_lookup_overlapping_slot(KVMMemoryListener *kml,
192 hwaddr start_addr,
193 hwaddr end_addr)
195 KVMState *s = kvm_state;
196 KVMSlot *found = NULL;
197 int i;
199 for (i = 0; i < s->nr_slots; i++) {
200 KVMSlot *mem = &kml->slots[i];
202 if (mem->memory_size == 0 ||
203 (found && found->start_addr < mem->start_addr)) {
204 continue;
207 if (end_addr > mem->start_addr &&
208 start_addr < mem->start_addr + mem->memory_size) {
209 found = mem;
213 return found;
216 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram,
217 hwaddr *phys_addr)
219 KVMMemoryListener *kml = &s->memory_listener;
220 int i;
222 for (i = 0; i < s->nr_slots; i++) {
223 KVMSlot *mem = &kml->slots[i];
225 if (ram >= mem->ram && ram < mem->ram + mem->memory_size) {
226 *phys_addr = mem->start_addr + (ram - mem->ram);
227 return 1;
231 return 0;
234 static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot)
236 KVMState *s = kvm_state;
237 struct kvm_userspace_memory_region mem;
239 mem.slot = slot->slot | (kml->as_id << 16);
240 mem.guest_phys_addr = slot->start_addr;
241 mem.userspace_addr = (unsigned long)slot->ram;
242 mem.flags = slot->flags;
244 if (slot->memory_size && mem.flags & KVM_MEM_READONLY) {
245 /* Set the slot size to 0 before setting the slot to the desired
246 * value. This is needed based on KVM commit 75d61fbc. */
247 mem.memory_size = 0;
248 kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
250 mem.memory_size = slot->memory_size;
251 return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
254 int kvm_destroy_vcpu(CPUState *cpu)
256 KVMState *s = kvm_state;
257 long mmap_size;
258 struct KVMParkedVcpu *vcpu = NULL;
259 int ret = 0;
261 DPRINTF("kvm_destroy_vcpu\n");
263 mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
264 if (mmap_size < 0) {
265 ret = mmap_size;
266 DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
267 goto err;
270 ret = munmap(cpu->kvm_run, mmap_size);
271 if (ret < 0) {
272 goto err;
275 vcpu = g_malloc0(sizeof(*vcpu));
276 vcpu->vcpu_id = kvm_arch_vcpu_id(cpu);
277 vcpu->kvm_fd = cpu->kvm_fd;
278 QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node);
279 err:
280 return ret;
283 static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id)
285 struct KVMParkedVcpu *cpu;
287 QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) {
288 if (cpu->vcpu_id == vcpu_id) {
289 int kvm_fd;
291 QLIST_REMOVE(cpu, node);
292 kvm_fd = cpu->kvm_fd;
293 g_free(cpu);
294 return kvm_fd;
298 return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id);
301 int kvm_init_vcpu(CPUState *cpu)
303 KVMState *s = kvm_state;
304 long mmap_size;
305 int ret;
307 DPRINTF("kvm_init_vcpu\n");
309 ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu));
310 if (ret < 0) {
311 DPRINTF("kvm_create_vcpu failed\n");
312 goto err;
315 cpu->kvm_fd = ret;
316 cpu->kvm_state = s;
317 cpu->kvm_vcpu_dirty = true;
319 mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
320 if (mmap_size < 0) {
321 ret = mmap_size;
322 DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
323 goto err;
326 cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
327 cpu->kvm_fd, 0);
328 if (cpu->kvm_run == MAP_FAILED) {
329 ret = -errno;
330 DPRINTF("mmap'ing vcpu state failed\n");
331 goto err;
334 if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
335 s->coalesced_mmio_ring =
336 (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE;
339 ret = kvm_arch_init_vcpu(cpu);
340 err:
341 return ret;
345 * dirty pages logging control
348 static int kvm_mem_flags(MemoryRegion *mr)
350 bool readonly = mr->readonly || memory_region_is_romd(mr);
351 int flags = 0;
353 if (memory_region_get_dirty_log_mask(mr) != 0) {
354 flags |= KVM_MEM_LOG_DIRTY_PAGES;
356 if (readonly && kvm_readonly_mem_allowed) {
357 flags |= KVM_MEM_READONLY;
359 return flags;
362 static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem,
363 MemoryRegion *mr)
365 int old_flags;
367 old_flags = mem->flags;
368 mem->flags = kvm_mem_flags(mr);
370 /* If nothing changed effectively, no need to issue ioctl */
371 if (mem->flags == old_flags) {
372 return 0;
375 return kvm_set_user_memory_region(kml, mem);
378 static int kvm_section_update_flags(KVMMemoryListener *kml,
379 MemoryRegionSection *section)
381 hwaddr phys_addr = section->offset_within_address_space;
382 ram_addr_t size = int128_get64(section->size);
383 KVMSlot *mem = kvm_lookup_matching_slot(kml, phys_addr, phys_addr + size);
385 if (mem == NULL) {
386 return 0;
387 } else {
388 return kvm_slot_update_flags(kml, mem, section->mr);
392 static void kvm_log_start(MemoryListener *listener,
393 MemoryRegionSection *section,
394 int old, int new)
396 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
397 int r;
399 if (old != 0) {
400 return;
403 r = kvm_section_update_flags(kml, section);
404 if (r < 0) {
405 abort();
409 static void kvm_log_stop(MemoryListener *listener,
410 MemoryRegionSection *section,
411 int old, int new)
413 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
414 int r;
416 if (new != 0) {
417 return;
420 r = kvm_section_update_flags(kml, section);
421 if (r < 0) {
422 abort();
426 /* get kvm's dirty pages bitmap and update qemu's */
427 static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
428 unsigned long *bitmap)
430 ram_addr_t start = section->offset_within_region +
431 memory_region_get_ram_addr(section->mr);
432 ram_addr_t pages = int128_get64(section->size) / getpagesize();
434 cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages);
435 return 0;
438 #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1))
441 * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
442 * This function updates qemu's dirty bitmap using
443 * memory_region_set_dirty(). This means all bits are set
444 * to dirty.
446 * @start_add: start of logged region.
447 * @end_addr: end of logged region.
449 static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml,
450 MemoryRegionSection *section)
452 KVMState *s = kvm_state;
453 unsigned long size, allocated_size = 0;
454 struct kvm_dirty_log d = {};
455 KVMSlot *mem;
456 int ret = 0;
457 hwaddr start_addr = section->offset_within_address_space;
458 hwaddr end_addr = start_addr + int128_get64(section->size);
460 d.dirty_bitmap = NULL;
461 while (start_addr < end_addr) {
462 mem = kvm_lookup_overlapping_slot(kml, start_addr, end_addr);
463 if (mem == NULL) {
464 break;
467 /* XXX bad kernel interface alert
468 * For dirty bitmap, kernel allocates array of size aligned to
469 * bits-per-long. But for case when the kernel is 64bits and
470 * the userspace is 32bits, userspace can't align to the same
471 * bits-per-long, since sizeof(long) is different between kernel
472 * and user space. This way, userspace will provide buffer which
473 * may be 4 bytes less than the kernel will use, resulting in
474 * userspace memory corruption (which is not detectable by valgrind
475 * too, in most cases).
476 * So for now, let's align to 64 instead of HOST_LONG_BITS here, in
477 * a hope that sizeof(long) won't become >8 any time soon.
479 size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
480 /*HOST_LONG_BITS*/ 64) / 8;
481 if (!d.dirty_bitmap) {
482 d.dirty_bitmap = g_malloc(size);
483 } else if (size > allocated_size) {
484 d.dirty_bitmap = g_realloc(d.dirty_bitmap, size);
486 allocated_size = size;
487 memset(d.dirty_bitmap, 0, allocated_size);
489 d.slot = mem->slot | (kml->as_id << 16);
490 if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
491 DPRINTF("ioctl failed %d\n", errno);
492 ret = -1;
493 break;
496 kvm_get_dirty_pages_log_range(section, d.dirty_bitmap);
497 start_addr = mem->start_addr + mem->memory_size;
499 g_free(d.dirty_bitmap);
501 return ret;
504 static void kvm_coalesce_mmio_region(MemoryListener *listener,
505 MemoryRegionSection *secion,
506 hwaddr start, hwaddr size)
508 KVMState *s = kvm_state;
510 if (s->coalesced_mmio) {
511 struct kvm_coalesced_mmio_zone zone;
513 zone.addr = start;
514 zone.size = size;
515 zone.pad = 0;
517 (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
521 static void kvm_uncoalesce_mmio_region(MemoryListener *listener,
522 MemoryRegionSection *secion,
523 hwaddr start, hwaddr size)
525 KVMState *s = kvm_state;
527 if (s->coalesced_mmio) {
528 struct kvm_coalesced_mmio_zone zone;
530 zone.addr = start;
531 zone.size = size;
532 zone.pad = 0;
534 (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
538 int kvm_check_extension(KVMState *s, unsigned int extension)
540 int ret;
542 ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension);
543 if (ret < 0) {
544 ret = 0;
547 return ret;
550 int kvm_vm_check_extension(KVMState *s, unsigned int extension)
552 int ret;
554 ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension);
555 if (ret < 0) {
556 /* VM wide version not implemented, use global one instead */
557 ret = kvm_check_extension(s, extension);
560 return ret;
563 static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size)
565 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
566 /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN
567 * endianness, but the memory core hands them in target endianness.
568 * For example, PPC is always treated as big-endian even if running
569 * on KVM and on PPC64LE. Correct here.
571 switch (size) {
572 case 2:
573 val = bswap16(val);
574 break;
575 case 4:
576 val = bswap32(val);
577 break;
579 #endif
580 return val;
583 static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val,
584 bool assign, uint32_t size, bool datamatch)
586 int ret;
587 struct kvm_ioeventfd iofd = {
588 .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0,
589 .addr = addr,
590 .len = size,
591 .flags = 0,
592 .fd = fd,
595 if (!kvm_enabled()) {
596 return -ENOSYS;
599 if (datamatch) {
600 iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH;
602 if (!assign) {
603 iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
606 ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd);
608 if (ret < 0) {
609 return -errno;
612 return 0;
615 static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val,
616 bool assign, uint32_t size, bool datamatch)
618 struct kvm_ioeventfd kick = {
619 .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0,
620 .addr = addr,
621 .flags = KVM_IOEVENTFD_FLAG_PIO,
622 .len = size,
623 .fd = fd,
625 int r;
626 if (!kvm_enabled()) {
627 return -ENOSYS;
629 if (datamatch) {
630 kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH;
632 if (!assign) {
633 kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
635 r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
636 if (r < 0) {
637 return r;
639 return 0;
643 static int kvm_check_many_ioeventfds(void)
645 /* Userspace can use ioeventfd for io notification. This requires a host
646 * that supports eventfd(2) and an I/O thread; since eventfd does not
647 * support SIGIO it cannot interrupt the vcpu.
649 * Older kernels have a 6 device limit on the KVM io bus. Find out so we
650 * can avoid creating too many ioeventfds.
652 #if defined(CONFIG_EVENTFD)
653 int ioeventfds[7];
654 int i, ret = 0;
655 for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) {
656 ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
657 if (ioeventfds[i] < 0) {
658 break;
660 ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true);
661 if (ret < 0) {
662 close(ioeventfds[i]);
663 break;
667 /* Decide whether many devices are supported or not */
668 ret = i == ARRAY_SIZE(ioeventfds);
670 while (i-- > 0) {
671 kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true);
672 close(ioeventfds[i]);
674 return ret;
675 #else
676 return 0;
677 #endif
680 static const KVMCapabilityInfo *
681 kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
683 while (list->name) {
684 if (!kvm_check_extension(s, list->value)) {
685 return list;
687 list++;
689 return NULL;
692 static void kvm_set_phys_mem(KVMMemoryListener *kml,
693 MemoryRegionSection *section, bool add)
695 KVMState *s = kvm_state;
696 KVMSlot *mem, old;
697 int err;
698 MemoryRegion *mr = section->mr;
699 bool writeable = !mr->readonly && !mr->rom_device;
700 hwaddr start_addr = section->offset_within_address_space;
701 ram_addr_t size = int128_get64(section->size);
702 void *ram = NULL;
703 unsigned delta;
705 /* kvm works in page size chunks, but the function may be called
706 with sub-page size and unaligned start address. Pad the start
707 address to next and truncate size to previous page boundary. */
708 delta = qemu_real_host_page_size - (start_addr & ~qemu_real_host_page_mask);
709 delta &= ~qemu_real_host_page_mask;
710 if (delta > size) {
711 return;
713 start_addr += delta;
714 size -= delta;
715 size &= qemu_real_host_page_mask;
716 if (!size || (start_addr & ~qemu_real_host_page_mask)) {
717 return;
720 if (!memory_region_is_ram(mr)) {
721 if (writeable || !kvm_readonly_mem_allowed) {
722 return;
723 } else if (!mr->romd_mode) {
724 /* If the memory device is not in romd_mode, then we actually want
725 * to remove the kvm memory slot so all accesses will trap. */
726 add = false;
730 ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta;
732 while (1) {
733 mem = kvm_lookup_overlapping_slot(kml, start_addr, start_addr + size);
734 if (!mem) {
735 break;
738 if (add && start_addr >= mem->start_addr &&
739 (start_addr + size <= mem->start_addr + mem->memory_size) &&
740 (ram - start_addr == mem->ram - mem->start_addr)) {
741 /* The new slot fits into the existing one and comes with
742 * identical parameters - update flags and done. */
743 kvm_slot_update_flags(kml, mem, mr);
744 return;
747 old = *mem;
749 if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
750 kvm_physical_sync_dirty_bitmap(kml, section);
753 /* unregister the overlapping slot */
754 mem->memory_size = 0;
755 err = kvm_set_user_memory_region(kml, mem);
756 if (err) {
757 fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
758 __func__, strerror(-err));
759 abort();
762 /* Workaround for older KVM versions: we can't join slots, even not by
763 * unregistering the previous ones and then registering the larger
764 * slot. We have to maintain the existing fragmentation. Sigh.
766 * This workaround assumes that the new slot starts at the same
767 * address as the first existing one. If not or if some overlapping
768 * slot comes around later, we will fail (not seen in practice so far)
769 * - and actually require a recent KVM version. */
770 if (s->broken_set_mem_region &&
771 old.start_addr == start_addr && old.memory_size < size && add) {
772 mem = kvm_alloc_slot(kml);
773 mem->memory_size = old.memory_size;
774 mem->start_addr = old.start_addr;
775 mem->ram = old.ram;
776 mem->flags = kvm_mem_flags(mr);
778 err = kvm_set_user_memory_region(kml, mem);
779 if (err) {
780 fprintf(stderr, "%s: error updating slot: %s\n", __func__,
781 strerror(-err));
782 abort();
785 start_addr += old.memory_size;
786 ram += old.memory_size;
787 size -= old.memory_size;
788 continue;
791 /* register prefix slot */
792 if (old.start_addr < start_addr) {
793 mem = kvm_alloc_slot(kml);
794 mem->memory_size = start_addr - old.start_addr;
795 mem->start_addr = old.start_addr;
796 mem->ram = old.ram;
797 mem->flags = kvm_mem_flags(mr);
799 err = kvm_set_user_memory_region(kml, mem);
800 if (err) {
801 fprintf(stderr, "%s: error registering prefix slot: %s\n",
802 __func__, strerror(-err));
803 #ifdef TARGET_PPC
804 fprintf(stderr, "%s: This is probably because your kernel's " \
805 "PAGE_SIZE is too big. Please try to use 4k " \
806 "PAGE_SIZE!\n", __func__);
807 #endif
808 abort();
812 /* register suffix slot */
813 if (old.start_addr + old.memory_size > start_addr + size) {
814 ram_addr_t size_delta;
816 mem = kvm_alloc_slot(kml);
817 mem->start_addr = start_addr + size;
818 size_delta = mem->start_addr - old.start_addr;
819 mem->memory_size = old.memory_size - size_delta;
820 mem->ram = old.ram + size_delta;
821 mem->flags = kvm_mem_flags(mr);
823 err = kvm_set_user_memory_region(kml, mem);
824 if (err) {
825 fprintf(stderr, "%s: error registering suffix slot: %s\n",
826 __func__, strerror(-err));
827 abort();
832 /* in case the KVM bug workaround already "consumed" the new slot */
833 if (!size) {
834 return;
836 if (!add) {
837 return;
839 mem = kvm_alloc_slot(kml);
840 mem->memory_size = size;
841 mem->start_addr = start_addr;
842 mem->ram = ram;
843 mem->flags = kvm_mem_flags(mr);
845 err = kvm_set_user_memory_region(kml, mem);
846 if (err) {
847 fprintf(stderr, "%s: error registering slot: %s\n", __func__,
848 strerror(-err));
849 abort();
853 static void kvm_region_add(MemoryListener *listener,
854 MemoryRegionSection *section)
856 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
858 memory_region_ref(section->mr);
859 kvm_set_phys_mem(kml, section, true);
862 static void kvm_region_del(MemoryListener *listener,
863 MemoryRegionSection *section)
865 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
867 kvm_set_phys_mem(kml, section, false);
868 memory_region_unref(section->mr);
871 static void kvm_log_sync(MemoryListener *listener,
872 MemoryRegionSection *section)
874 KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
875 int r;
877 r = kvm_physical_sync_dirty_bitmap(kml, section);
878 if (r < 0) {
879 abort();
883 static void kvm_mem_ioeventfd_add(MemoryListener *listener,
884 MemoryRegionSection *section,
885 bool match_data, uint64_t data,
886 EventNotifier *e)
888 int fd = event_notifier_get_fd(e);
889 int r;
891 r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
892 data, true, int128_get64(section->size),
893 match_data);
894 if (r < 0) {
895 fprintf(stderr, "%s: error adding ioeventfd: %s\n",
896 __func__, strerror(-r));
897 abort();
901 static void kvm_mem_ioeventfd_del(MemoryListener *listener,
902 MemoryRegionSection *section,
903 bool match_data, uint64_t data,
904 EventNotifier *e)
906 int fd = event_notifier_get_fd(e);
907 int r;
909 r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
910 data, false, int128_get64(section->size),
911 match_data);
912 if (r < 0) {
913 abort();
917 static void kvm_io_ioeventfd_add(MemoryListener *listener,
918 MemoryRegionSection *section,
919 bool match_data, uint64_t data,
920 EventNotifier *e)
922 int fd = event_notifier_get_fd(e);
923 int r;
925 r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
926 data, true, int128_get64(section->size),
927 match_data);
928 if (r < 0) {
929 fprintf(stderr, "%s: error adding ioeventfd: %s\n",
930 __func__, strerror(-r));
931 abort();
935 static void kvm_io_ioeventfd_del(MemoryListener *listener,
936 MemoryRegionSection *section,
937 bool match_data, uint64_t data,
938 EventNotifier *e)
941 int fd = event_notifier_get_fd(e);
942 int r;
944 r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
945 data, false, int128_get64(section->size),
946 match_data);
947 if (r < 0) {
948 abort();
952 void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
953 AddressSpace *as, int as_id)
955 int i;
957 kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot));
958 kml->as_id = as_id;
960 for (i = 0; i < s->nr_slots; i++) {
961 kml->slots[i].slot = i;
964 kml->listener.region_add = kvm_region_add;
965 kml->listener.region_del = kvm_region_del;
966 kml->listener.log_start = kvm_log_start;
967 kml->listener.log_stop = kvm_log_stop;
968 kml->listener.log_sync = kvm_log_sync;
969 kml->listener.priority = 10;
971 memory_listener_register(&kml->listener, as);
974 static MemoryListener kvm_io_listener = {
975 .eventfd_add = kvm_io_ioeventfd_add,
976 .eventfd_del = kvm_io_ioeventfd_del,
977 .priority = 10,
980 static void kvm_handle_interrupt(CPUState *cpu, int mask)
982 cpu->interrupt_request |= mask;
984 if (!qemu_cpu_is_self(cpu)) {
985 qemu_cpu_kick(cpu);
989 int kvm_set_irq(KVMState *s, int irq, int level)
991 struct kvm_irq_level event;
992 int ret;
994 assert(kvm_async_interrupts_enabled());
996 event.level = level;
997 event.irq = irq;
998 ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event);
999 if (ret < 0) {
1000 perror("kvm_set_irq");
1001 abort();
1004 return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status;
1007 #ifdef KVM_CAP_IRQ_ROUTING
1008 typedef struct KVMMSIRoute {
1009 struct kvm_irq_routing_entry kroute;
1010 QTAILQ_ENTRY(KVMMSIRoute) entry;
1011 } KVMMSIRoute;
1013 static void set_gsi(KVMState *s, unsigned int gsi)
1015 set_bit(gsi, s->used_gsi_bitmap);
1018 static void clear_gsi(KVMState *s, unsigned int gsi)
1020 clear_bit(gsi, s->used_gsi_bitmap);
1023 void kvm_init_irq_routing(KVMState *s)
1025 int gsi_count, i;
1027 gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1;
1028 if (gsi_count > 0) {
1029 /* Round up so we can search ints using ffs */
1030 s->used_gsi_bitmap = bitmap_new(gsi_count);
1031 s->gsi_count = gsi_count;
1034 s->irq_routes = g_malloc0(sizeof(*s->irq_routes));
1035 s->nr_allocated_irq_routes = 0;
1037 if (!kvm_direct_msi_allowed) {
1038 for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) {
1039 QTAILQ_INIT(&s->msi_hashtab[i]);
1043 kvm_arch_init_irq_routing(s);
1046 void kvm_irqchip_commit_routes(KVMState *s)
1048 int ret;
1050 s->irq_routes->flags = 0;
1051 trace_kvm_irqchip_commit_routes();
1052 ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes);
1053 assert(ret == 0);
1056 static void kvm_add_routing_entry(KVMState *s,
1057 struct kvm_irq_routing_entry *entry)
1059 struct kvm_irq_routing_entry *new;
1060 int n, size;
1062 if (s->irq_routes->nr == s->nr_allocated_irq_routes) {
1063 n = s->nr_allocated_irq_routes * 2;
1064 if (n < 64) {
1065 n = 64;
1067 size = sizeof(struct kvm_irq_routing);
1068 size += n * sizeof(*new);
1069 s->irq_routes = g_realloc(s->irq_routes, size);
1070 s->nr_allocated_irq_routes = n;
1072 n = s->irq_routes->nr++;
1073 new = &s->irq_routes->entries[n];
1075 *new = *entry;
1077 set_gsi(s, entry->gsi);
1080 static int kvm_update_routing_entry(KVMState *s,
1081 struct kvm_irq_routing_entry *new_entry)
1083 struct kvm_irq_routing_entry *entry;
1084 int n;
1086 for (n = 0; n < s->irq_routes->nr; n++) {
1087 entry = &s->irq_routes->entries[n];
1088 if (entry->gsi != new_entry->gsi) {
1089 continue;
1092 if(!memcmp(entry, new_entry, sizeof *entry)) {
1093 return 0;
1096 *entry = *new_entry;
1098 return 0;
1101 return -ESRCH;
1104 void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin)
1106 struct kvm_irq_routing_entry e = {};
1108 assert(pin < s->gsi_count);
1110 e.gsi = irq;
1111 e.type = KVM_IRQ_ROUTING_IRQCHIP;
1112 e.flags = 0;
1113 e.u.irqchip.irqchip = irqchip;
1114 e.u.irqchip.pin = pin;
1115 kvm_add_routing_entry(s, &e);
1118 void kvm_irqchip_release_virq(KVMState *s, int virq)
1120 struct kvm_irq_routing_entry *e;
1121 int i;
1123 if (kvm_gsi_direct_mapping()) {
1124 return;
1127 for (i = 0; i < s->irq_routes->nr; i++) {
1128 e = &s->irq_routes->entries[i];
1129 if (e->gsi == virq) {
1130 s->irq_routes->nr--;
1131 *e = s->irq_routes->entries[s->irq_routes->nr];
1134 clear_gsi(s, virq);
1135 kvm_arch_release_virq_post(virq);
1138 static unsigned int kvm_hash_msi(uint32_t data)
1140 /* This is optimized for IA32 MSI layout. However, no other arch shall
1141 * repeat the mistake of not providing a direct MSI injection API. */
1142 return data & 0xff;
1145 static void kvm_flush_dynamic_msi_routes(KVMState *s)
1147 KVMMSIRoute *route, *next;
1148 unsigned int hash;
1150 for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) {
1151 QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) {
1152 kvm_irqchip_release_virq(s, route->kroute.gsi);
1153 QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry);
1154 g_free(route);
1159 static int kvm_irqchip_get_virq(KVMState *s)
1161 int next_virq;
1164 * PIC and IOAPIC share the first 16 GSI numbers, thus the available
1165 * GSI numbers are more than the number of IRQ route. Allocating a GSI
1166 * number can succeed even though a new route entry cannot be added.
1167 * When this happens, flush dynamic MSI entries to free IRQ route entries.
1169 if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) {
1170 kvm_flush_dynamic_msi_routes(s);
1173 /* Return the lowest unused GSI in the bitmap */
1174 next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count);
1175 if (next_virq >= s->gsi_count) {
1176 return -ENOSPC;
1177 } else {
1178 return next_virq;
1182 static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg)
1184 unsigned int hash = kvm_hash_msi(msg.data);
1185 KVMMSIRoute *route;
1187 QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) {
1188 if (route->kroute.u.msi.address_lo == (uint32_t)msg.address &&
1189 route->kroute.u.msi.address_hi == (msg.address >> 32) &&
1190 route->kroute.u.msi.data == le32_to_cpu(msg.data)) {
1191 return route;
1194 return NULL;
1197 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1199 struct kvm_msi msi;
1200 KVMMSIRoute *route;
1202 if (kvm_direct_msi_allowed) {
1203 msi.address_lo = (uint32_t)msg.address;
1204 msi.address_hi = msg.address >> 32;
1205 msi.data = le32_to_cpu(msg.data);
1206 msi.flags = 0;
1207 memset(msi.pad, 0, sizeof(msi.pad));
1209 return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi);
1212 route = kvm_lookup_msi_route(s, msg);
1213 if (!route) {
1214 int virq;
1216 virq = kvm_irqchip_get_virq(s);
1217 if (virq < 0) {
1218 return virq;
1221 route = g_malloc0(sizeof(KVMMSIRoute));
1222 route->kroute.gsi = virq;
1223 route->kroute.type = KVM_IRQ_ROUTING_MSI;
1224 route->kroute.flags = 0;
1225 route->kroute.u.msi.address_lo = (uint32_t)msg.address;
1226 route->kroute.u.msi.address_hi = msg.address >> 32;
1227 route->kroute.u.msi.data = le32_to_cpu(msg.data);
1229 kvm_add_routing_entry(s, &route->kroute);
1230 kvm_irqchip_commit_routes(s);
1232 QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route,
1233 entry);
1236 assert(route->kroute.type == KVM_IRQ_ROUTING_MSI);
1238 return kvm_set_irq(s, route->kroute.gsi, 1);
1241 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
1243 struct kvm_irq_routing_entry kroute = {};
1244 int virq;
1245 MSIMessage msg = {0, 0};
1247 if (dev) {
1248 msg = pci_get_msi_message(dev, vector);
1251 if (kvm_gsi_direct_mapping()) {
1252 return kvm_arch_msi_data_to_gsi(msg.data);
1255 if (!kvm_gsi_routing_enabled()) {
1256 return -ENOSYS;
1259 virq = kvm_irqchip_get_virq(s);
1260 if (virq < 0) {
1261 return virq;
1264 kroute.gsi = virq;
1265 kroute.type = KVM_IRQ_ROUTING_MSI;
1266 kroute.flags = 0;
1267 kroute.u.msi.address_lo = (uint32_t)msg.address;
1268 kroute.u.msi.address_hi = msg.address >> 32;
1269 kroute.u.msi.data = le32_to_cpu(msg.data);
1270 if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
1271 kvm_irqchip_release_virq(s, virq);
1272 return -EINVAL;
1275 trace_kvm_irqchip_add_msi_route(virq);
1277 kvm_add_routing_entry(s, &kroute);
1278 kvm_arch_add_msi_route_post(&kroute, vector, dev);
1279 kvm_irqchip_commit_routes(s);
1281 return virq;
1284 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
1285 PCIDevice *dev)
1287 struct kvm_irq_routing_entry kroute = {};
1289 if (kvm_gsi_direct_mapping()) {
1290 return 0;
1293 if (!kvm_irqchip_in_kernel()) {
1294 return -ENOSYS;
1297 kroute.gsi = virq;
1298 kroute.type = KVM_IRQ_ROUTING_MSI;
1299 kroute.flags = 0;
1300 kroute.u.msi.address_lo = (uint32_t)msg.address;
1301 kroute.u.msi.address_hi = msg.address >> 32;
1302 kroute.u.msi.data = le32_to_cpu(msg.data);
1303 if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
1304 return -EINVAL;
1307 trace_kvm_irqchip_update_msi_route(virq);
1309 return kvm_update_routing_entry(s, &kroute);
1312 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq,
1313 bool assign)
1315 struct kvm_irqfd irqfd = {
1316 .fd = fd,
1317 .gsi = virq,
1318 .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
1321 if (rfd != -1) {
1322 irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE;
1323 irqfd.resamplefd = rfd;
1326 if (!kvm_irqfds_enabled()) {
1327 return -ENOSYS;
1330 return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd);
1333 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
1335 struct kvm_irq_routing_entry kroute = {};
1336 int virq;
1338 if (!kvm_gsi_routing_enabled()) {
1339 return -ENOSYS;
1342 virq = kvm_irqchip_get_virq(s);
1343 if (virq < 0) {
1344 return virq;
1347 kroute.gsi = virq;
1348 kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER;
1349 kroute.flags = 0;
1350 kroute.u.adapter.summary_addr = adapter->summary_addr;
1351 kroute.u.adapter.ind_addr = adapter->ind_addr;
1352 kroute.u.adapter.summary_offset = adapter->summary_offset;
1353 kroute.u.adapter.ind_offset = adapter->ind_offset;
1354 kroute.u.adapter.adapter_id = adapter->adapter_id;
1356 kvm_add_routing_entry(s, &kroute);
1358 return virq;
1361 int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
1363 struct kvm_irq_routing_entry kroute = {};
1364 int virq;
1366 if (!kvm_gsi_routing_enabled()) {
1367 return -ENOSYS;
1369 if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) {
1370 return -ENOSYS;
1372 virq = kvm_irqchip_get_virq(s);
1373 if (virq < 0) {
1374 return virq;
1377 kroute.gsi = virq;
1378 kroute.type = KVM_IRQ_ROUTING_HV_SINT;
1379 kroute.flags = 0;
1380 kroute.u.hv_sint.vcpu = vcpu;
1381 kroute.u.hv_sint.sint = sint;
1383 kvm_add_routing_entry(s, &kroute);
1384 kvm_irqchip_commit_routes(s);
1386 return virq;
1389 #else /* !KVM_CAP_IRQ_ROUTING */
1391 void kvm_init_irq_routing(KVMState *s)
1395 void kvm_irqchip_release_virq(KVMState *s, int virq)
1399 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1401 abort();
1404 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
1406 return -ENOSYS;
1409 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
1411 return -ENOSYS;
1414 int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
1416 return -ENOSYS;
1419 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
1421 abort();
1424 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
1426 return -ENOSYS;
1428 #endif /* !KVM_CAP_IRQ_ROUTING */
1430 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
1431 EventNotifier *rn, int virq)
1433 return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n),
1434 rn ? event_notifier_get_fd(rn) : -1, virq, true);
1437 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
1438 int virq)
1440 return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq,
1441 false);
1444 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
1445 EventNotifier *rn, qemu_irq irq)
1447 gpointer key, gsi;
1448 gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
1450 if (!found) {
1451 return -ENXIO;
1453 return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi));
1456 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n,
1457 qemu_irq irq)
1459 gpointer key, gsi;
1460 gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
1462 if (!found) {
1463 return -ENXIO;
1465 return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi));
1468 void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi)
1470 g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi));
1473 static void kvm_irqchip_create(MachineState *machine, KVMState *s)
1475 int ret;
1477 if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
1479 } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) {
1480 ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0);
1481 if (ret < 0) {
1482 fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret));
1483 exit(1);
1485 } else {
1486 return;
1489 /* First probe and see if there's a arch-specific hook to create the
1490 * in-kernel irqchip for us */
1491 ret = kvm_arch_irqchip_create(machine, s);
1492 if (ret == 0) {
1493 if (machine_kernel_irqchip_split(machine)) {
1494 perror("Split IRQ chip mode not supported.");
1495 exit(1);
1496 } else {
1497 ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP);
1500 if (ret < 0) {
1501 fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret));
1502 exit(1);
1505 kvm_kernel_irqchip = true;
1506 /* If we have an in-kernel IRQ chip then we must have asynchronous
1507 * interrupt delivery (though the reverse is not necessarily true)
1509 kvm_async_interrupts_allowed = true;
1510 kvm_halt_in_kernel_allowed = true;
1512 kvm_init_irq_routing(s);
1514 s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal);
1517 /* Find number of supported CPUs using the recommended
1518 * procedure from the kernel API documentation to cope with
1519 * older kernels that may be missing capabilities.
1521 static int kvm_recommended_vcpus(KVMState *s)
1523 int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
1524 return (ret) ? ret : 4;
1527 static int kvm_max_vcpus(KVMState *s)
1529 int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
1530 return (ret) ? ret : kvm_recommended_vcpus(s);
1533 static int kvm_max_vcpu_id(KVMState *s)
1535 int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID);
1536 return (ret) ? ret : kvm_max_vcpus(s);
1539 bool kvm_vcpu_id_is_valid(int vcpu_id)
1541 KVMState *s = KVM_STATE(current_machine->accelerator);
1542 return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s);
1545 static int kvm_init(MachineState *ms)
1547 MachineClass *mc = MACHINE_GET_CLASS(ms);
1548 static const char upgrade_note[] =
1549 "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
1550 "(see http://sourceforge.net/projects/kvm).\n";
1551 struct {
1552 const char *name;
1553 int num;
1554 } num_cpus[] = {
1555 { "SMP", smp_cpus },
1556 { "hotpluggable", max_cpus },
1557 { NULL, }
1558 }, *nc = num_cpus;
1559 int soft_vcpus_limit, hard_vcpus_limit;
1560 KVMState *s;
1561 const KVMCapabilityInfo *missing_cap;
1562 int ret;
1563 int type = 0;
1564 const char *kvm_type;
1566 s = KVM_STATE(ms->accelerator);
1569 * On systems where the kernel can support different base page
1570 * sizes, host page size may be different from TARGET_PAGE_SIZE,
1571 * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum
1572 * page size for the system though.
1574 assert(TARGET_PAGE_SIZE <= getpagesize());
1576 s->sigmask_len = 8;
1578 #ifdef KVM_CAP_SET_GUEST_DEBUG
1579 QTAILQ_INIT(&s->kvm_sw_breakpoints);
1580 #endif
1581 QLIST_INIT(&s->kvm_parked_vcpus);
1582 s->vmfd = -1;
1583 s->fd = qemu_open("/dev/kvm", O_RDWR);
1584 if (s->fd == -1) {
1585 fprintf(stderr, "Could not access KVM kernel module: %m\n");
1586 ret = -errno;
1587 goto err;
1590 ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
1591 if (ret < KVM_API_VERSION) {
1592 if (ret >= 0) {
1593 ret = -EINVAL;
1595 fprintf(stderr, "kvm version too old\n");
1596 goto err;
1599 if (ret > KVM_API_VERSION) {
1600 ret = -EINVAL;
1601 fprintf(stderr, "kvm version not supported\n");
1602 goto err;
1605 s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
1607 /* If unspecified, use the default value */
1608 if (!s->nr_slots) {
1609 s->nr_slots = 32;
1612 /* check the vcpu limits */
1613 soft_vcpus_limit = kvm_recommended_vcpus(s);
1614 hard_vcpus_limit = kvm_max_vcpus(s);
1616 while (nc->name) {
1617 if (nc->num > soft_vcpus_limit) {
1618 fprintf(stderr,
1619 "Warning: Number of %s cpus requested (%d) exceeds "
1620 "the recommended cpus supported by KVM (%d)\n",
1621 nc->name, nc->num, soft_vcpus_limit);
1623 if (nc->num > hard_vcpus_limit) {
1624 fprintf(stderr, "Number of %s cpus requested (%d) exceeds "
1625 "the maximum cpus supported by KVM (%d)\n",
1626 nc->name, nc->num, hard_vcpus_limit);
1627 exit(1);
1630 nc++;
1633 kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type");
1634 if (mc->kvm_type) {
1635 type = mc->kvm_type(kvm_type);
1636 } else if (kvm_type) {
1637 ret = -EINVAL;
1638 fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type);
1639 goto err;
1642 do {
1643 ret = kvm_ioctl(s, KVM_CREATE_VM, type);
1644 } while (ret == -EINTR);
1646 if (ret < 0) {
1647 fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret,
1648 strerror(-ret));
1650 #ifdef TARGET_S390X
1651 if (ret == -EINVAL) {
1652 fprintf(stderr,
1653 "Host kernel setup problem detected. Please verify:\n");
1654 fprintf(stderr, "- for kernels supporting the switch_amode or"
1655 " user_mode parameters, whether\n");
1656 fprintf(stderr,
1657 " user space is running in primary address space\n");
1658 fprintf(stderr,
1659 "- for kernels supporting the vm.allocate_pgste sysctl, "
1660 "whether it is enabled\n");
1662 #endif
1663 goto err;
1666 s->vmfd = ret;
1667 missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
1668 if (!missing_cap) {
1669 missing_cap =
1670 kvm_check_extension_list(s, kvm_arch_required_capabilities);
1672 if (missing_cap) {
1673 ret = -EINVAL;
1674 fprintf(stderr, "kvm does not support %s\n%s",
1675 missing_cap->name, upgrade_note);
1676 goto err;
1679 s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
1681 s->broken_set_mem_region = 1;
1682 ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS);
1683 if (ret > 0) {
1684 s->broken_set_mem_region = 0;
1687 #ifdef KVM_CAP_VCPU_EVENTS
1688 s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
1689 #endif
1691 s->robust_singlestep =
1692 kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP);
1694 #ifdef KVM_CAP_DEBUGREGS
1695 s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
1696 #endif
1698 #ifdef KVM_CAP_IRQ_ROUTING
1699 kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
1700 #endif
1702 s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3);
1704 s->irq_set_ioctl = KVM_IRQ_LINE;
1705 if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
1706 s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
1709 #ifdef KVM_CAP_READONLY_MEM
1710 kvm_readonly_mem_allowed =
1711 (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0);
1712 #endif
1714 kvm_eventfds_allowed =
1715 (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0);
1717 kvm_irqfds_allowed =
1718 (kvm_check_extension(s, KVM_CAP_IRQFD) > 0);
1720 kvm_resamplefds_allowed =
1721 (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0);
1723 kvm_vm_attributes_allowed =
1724 (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0);
1726 kvm_ioeventfd_any_length_allowed =
1727 (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0);
1729 ret = kvm_arch_init(ms, s);
1730 if (ret < 0) {
1731 goto err;
1734 if (machine_kernel_irqchip_allowed(ms)) {
1735 kvm_irqchip_create(ms, s);
1738 kvm_state = s;
1740 if (kvm_eventfds_allowed) {
1741 s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add;
1742 s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del;
1744 s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region;
1745 s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region;
1747 kvm_memory_listener_register(s, &s->memory_listener,
1748 &address_space_memory, 0);
1749 memory_listener_register(&kvm_io_listener,
1750 &address_space_io);
1752 s->many_ioeventfds = kvm_check_many_ioeventfds();
1754 cpu_interrupt_handler = kvm_handle_interrupt;
1756 return 0;
1758 err:
1759 assert(ret < 0);
1760 if (s->vmfd >= 0) {
1761 close(s->vmfd);
1763 if (s->fd != -1) {
1764 close(s->fd);
1766 g_free(s->memory_listener.slots);
1768 return ret;
1771 void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len)
1773 s->sigmask_len = sigmask_len;
1776 static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction,
1777 int size, uint32_t count)
1779 int i;
1780 uint8_t *ptr = data;
1782 for (i = 0; i < count; i++) {
1783 address_space_rw(&address_space_io, port, attrs,
1784 ptr, size,
1785 direction == KVM_EXIT_IO_OUT);
1786 ptr += size;
1790 static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run)
1792 fprintf(stderr, "KVM internal error. Suberror: %d\n",
1793 run->internal.suberror);
1795 if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
1796 int i;
1798 for (i = 0; i < run->internal.ndata; ++i) {
1799 fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
1800 i, (uint64_t)run->internal.data[i]);
1803 if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
1804 fprintf(stderr, "emulation failure\n");
1805 if (!kvm_arch_stop_on_emulation_error(cpu)) {
1806 cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE);
1807 return EXCP_INTERRUPT;
1810 /* FIXME: Should trigger a qmp message to let management know
1811 * something went wrong.
1813 return -1;
1816 void kvm_flush_coalesced_mmio_buffer(void)
1818 KVMState *s = kvm_state;
1820 if (s->coalesced_flush_in_progress) {
1821 return;
1824 s->coalesced_flush_in_progress = true;
1826 if (s->coalesced_mmio_ring) {
1827 struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
1828 while (ring->first != ring->last) {
1829 struct kvm_coalesced_mmio *ent;
1831 ent = &ring->coalesced_mmio[ring->first];
1833 cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
1834 smp_wmb();
1835 ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
1839 s->coalesced_flush_in_progress = false;
1842 static void do_kvm_cpu_synchronize_state(void *arg)
1844 CPUState *cpu = arg;
1846 if (!cpu->kvm_vcpu_dirty) {
1847 kvm_arch_get_registers(cpu);
1848 cpu->kvm_vcpu_dirty = true;
1852 void kvm_cpu_synchronize_state(CPUState *cpu)
1854 if (!cpu->kvm_vcpu_dirty) {
1855 run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu);
1859 static void do_kvm_cpu_synchronize_post_reset(void *arg)
1861 CPUState *cpu = arg;
1863 kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE);
1864 cpu->kvm_vcpu_dirty = false;
1867 void kvm_cpu_synchronize_post_reset(CPUState *cpu)
1869 run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, cpu);
1872 static void do_kvm_cpu_synchronize_post_init(void *arg)
1874 CPUState *cpu = arg;
1876 kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE);
1877 cpu->kvm_vcpu_dirty = false;
1880 void kvm_cpu_synchronize_post_init(CPUState *cpu)
1882 run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, cpu);
1885 int kvm_cpu_exec(CPUState *cpu)
1887 struct kvm_run *run = cpu->kvm_run;
1888 int ret, run_ret;
1890 DPRINTF("kvm_cpu_exec()\n");
1892 if (kvm_arch_process_async_events(cpu)) {
1893 cpu->exit_request = 0;
1894 return EXCP_HLT;
1897 qemu_mutex_unlock_iothread();
1899 do {
1900 MemTxAttrs attrs;
1902 if (cpu->kvm_vcpu_dirty) {
1903 kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE);
1904 cpu->kvm_vcpu_dirty = false;
1907 kvm_arch_pre_run(cpu, run);
1908 if (cpu->exit_request) {
1909 DPRINTF("interrupt exit requested\n");
1911 * KVM requires us to reenter the kernel after IO exits to complete
1912 * instruction emulation. This self-signal will ensure that we
1913 * leave ASAP again.
1915 qemu_cpu_kick_self();
1918 run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0);
1920 attrs = kvm_arch_post_run(cpu, run);
1922 if (run_ret < 0) {
1923 if (run_ret == -EINTR || run_ret == -EAGAIN) {
1924 DPRINTF("io window exit\n");
1925 ret = EXCP_INTERRUPT;
1926 break;
1928 fprintf(stderr, "error: kvm run failed %s\n",
1929 strerror(-run_ret));
1930 #ifdef TARGET_PPC
1931 if (run_ret == -EBUSY) {
1932 fprintf(stderr,
1933 "This is probably because your SMT is enabled.\n"
1934 "VCPU can only run on primary threads with all "
1935 "secondary threads offline.\n");
1937 #endif
1938 ret = -1;
1939 break;
1942 trace_kvm_run_exit(cpu->cpu_index, run->exit_reason);
1943 switch (run->exit_reason) {
1944 case KVM_EXIT_IO:
1945 DPRINTF("handle_io\n");
1946 /* Called outside BQL */
1947 kvm_handle_io(run->io.port, attrs,
1948 (uint8_t *)run + run->io.data_offset,
1949 run->io.direction,
1950 run->io.size,
1951 run->io.count);
1952 ret = 0;
1953 break;
1954 case KVM_EXIT_MMIO:
1955 DPRINTF("handle_mmio\n");
1956 /* Called outside BQL */
1957 address_space_rw(&address_space_memory,
1958 run->mmio.phys_addr, attrs,
1959 run->mmio.data,
1960 run->mmio.len,
1961 run->mmio.is_write);
1962 ret = 0;
1963 break;
1964 case KVM_EXIT_IRQ_WINDOW_OPEN:
1965 DPRINTF("irq_window_open\n");
1966 ret = EXCP_INTERRUPT;
1967 break;
1968 case KVM_EXIT_SHUTDOWN:
1969 DPRINTF("shutdown\n");
1970 qemu_system_reset_request();
1971 ret = EXCP_INTERRUPT;
1972 break;
1973 case KVM_EXIT_UNKNOWN:
1974 fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
1975 (uint64_t)run->hw.hardware_exit_reason);
1976 ret = -1;
1977 break;
1978 case KVM_EXIT_INTERNAL_ERROR:
1979 ret = kvm_handle_internal_error(cpu, run);
1980 break;
1981 case KVM_EXIT_SYSTEM_EVENT:
1982 switch (run->system_event.type) {
1983 case KVM_SYSTEM_EVENT_SHUTDOWN:
1984 qemu_system_shutdown_request();
1985 ret = EXCP_INTERRUPT;
1986 break;
1987 case KVM_SYSTEM_EVENT_RESET:
1988 qemu_system_reset_request();
1989 ret = EXCP_INTERRUPT;
1990 break;
1991 case KVM_SYSTEM_EVENT_CRASH:
1992 qemu_mutex_lock_iothread();
1993 qemu_system_guest_panicked();
1994 qemu_mutex_unlock_iothread();
1995 ret = 0;
1996 break;
1997 default:
1998 DPRINTF("kvm_arch_handle_exit\n");
1999 ret = kvm_arch_handle_exit(cpu, run);
2000 break;
2002 break;
2003 default:
2004 DPRINTF("kvm_arch_handle_exit\n");
2005 ret = kvm_arch_handle_exit(cpu, run);
2006 break;
2008 } while (ret == 0);
2010 qemu_mutex_lock_iothread();
2012 if (ret < 0) {
2013 cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE);
2014 vm_stop(RUN_STATE_INTERNAL_ERROR);
2017 cpu->exit_request = 0;
2018 return ret;
2021 int kvm_ioctl(KVMState *s, int type, ...)
2023 int ret;
2024 void *arg;
2025 va_list ap;
2027 va_start(ap, type);
2028 arg = va_arg(ap, void *);
2029 va_end(ap);
2031 trace_kvm_ioctl(type, arg);
2032 ret = ioctl(s->fd, type, arg);
2033 if (ret == -1) {
2034 ret = -errno;
2036 return ret;
2039 int kvm_vm_ioctl(KVMState *s, int type, ...)
2041 int ret;
2042 void *arg;
2043 va_list ap;
2045 va_start(ap, type);
2046 arg = va_arg(ap, void *);
2047 va_end(ap);
2049 trace_kvm_vm_ioctl(type, arg);
2050 ret = ioctl(s->vmfd, type, arg);
2051 if (ret == -1) {
2052 ret = -errno;
2054 return ret;
2057 int kvm_vcpu_ioctl(CPUState *cpu, int type, ...)
2059 int ret;
2060 void *arg;
2061 va_list ap;
2063 va_start(ap, type);
2064 arg = va_arg(ap, void *);
2065 va_end(ap);
2067 trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg);
2068 ret = ioctl(cpu->kvm_fd, type, arg);
2069 if (ret == -1) {
2070 ret = -errno;
2072 return ret;
2075 int kvm_device_ioctl(int fd, int type, ...)
2077 int ret;
2078 void *arg;
2079 va_list ap;
2081 va_start(ap, type);
2082 arg = va_arg(ap, void *);
2083 va_end(ap);
2085 trace_kvm_device_ioctl(fd, type, arg);
2086 ret = ioctl(fd, type, arg);
2087 if (ret == -1) {
2088 ret = -errno;
2090 return ret;
2093 int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr)
2095 int ret;
2096 struct kvm_device_attr attribute = {
2097 .group = group,
2098 .attr = attr,
2101 if (!kvm_vm_attributes_allowed) {
2102 return 0;
2105 ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute);
2106 /* kvm returns 0 on success for HAS_DEVICE_ATTR */
2107 return ret ? 0 : 1;
2110 int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr)
2112 struct kvm_device_attr attribute = {
2113 .group = group,
2114 .attr = attr,
2115 .flags = 0,
2118 return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1;
2121 void kvm_device_access(int fd, int group, uint64_t attr,
2122 void *val, bool write)
2124 struct kvm_device_attr kvmattr;
2125 int err;
2127 kvmattr.flags = 0;
2128 kvmattr.group = group;
2129 kvmattr.attr = attr;
2130 kvmattr.addr = (uintptr_t)val;
2132 err = kvm_device_ioctl(fd,
2133 write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR,
2134 &kvmattr);
2135 if (err < 0) {
2136 error_report("KVM_%s_DEVICE_ATTR failed: %s",
2137 write ? "SET" : "GET", strerror(-err));
2138 error_printf("Group %d attr 0x%016" PRIx64, group, attr);
2139 abort();
2143 int kvm_has_sync_mmu(void)
2145 return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
2148 int kvm_has_vcpu_events(void)
2150 return kvm_state->vcpu_events;
2153 int kvm_has_robust_singlestep(void)
2155 return kvm_state->robust_singlestep;
2158 int kvm_has_debugregs(void)
2160 return kvm_state->debugregs;
2163 int kvm_has_many_ioeventfds(void)
2165 if (!kvm_enabled()) {
2166 return 0;
2168 return kvm_state->many_ioeventfds;
2171 int kvm_has_gsi_routing(void)
2173 #ifdef KVM_CAP_IRQ_ROUTING
2174 return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING);
2175 #else
2176 return false;
2177 #endif
2180 int kvm_has_intx_set_mask(void)
2182 return kvm_state->intx_set_mask;
2185 void kvm_setup_guest_memory(void *start, size_t size)
2187 if (!kvm_has_sync_mmu()) {
2188 int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
2190 if (ret) {
2191 perror("qemu_madvise");
2192 fprintf(stderr,
2193 "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
2194 exit(1);
2199 #ifdef KVM_CAP_SET_GUEST_DEBUG
2200 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
2201 target_ulong pc)
2203 struct kvm_sw_breakpoint *bp;
2205 QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) {
2206 if (bp->pc == pc) {
2207 return bp;
2210 return NULL;
2213 int kvm_sw_breakpoints_active(CPUState *cpu)
2215 return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints);
2218 struct kvm_set_guest_debug_data {
2219 struct kvm_guest_debug dbg;
2220 CPUState *cpu;
2221 int err;
2224 static void kvm_invoke_set_guest_debug(void *data)
2226 struct kvm_set_guest_debug_data *dbg_data = data;
2228 dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG,
2229 &dbg_data->dbg);
2232 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
2234 struct kvm_set_guest_debug_data data;
2236 data.dbg.control = reinject_trap;
2238 if (cpu->singlestep_enabled) {
2239 data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
2241 kvm_arch_update_guest_debug(cpu, &data.dbg);
2242 data.cpu = cpu;
2244 run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data);
2245 return data.err;
2248 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
2249 target_ulong len, int type)
2251 struct kvm_sw_breakpoint *bp;
2252 int err;
2254 if (type == GDB_BREAKPOINT_SW) {
2255 bp = kvm_find_sw_breakpoint(cpu, addr);
2256 if (bp) {
2257 bp->use_count++;
2258 return 0;
2261 bp = g_malloc(sizeof(struct kvm_sw_breakpoint));
2262 bp->pc = addr;
2263 bp->use_count = 1;
2264 err = kvm_arch_insert_sw_breakpoint(cpu, bp);
2265 if (err) {
2266 g_free(bp);
2267 return err;
2270 QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
2271 } else {
2272 err = kvm_arch_insert_hw_breakpoint(addr, len, type);
2273 if (err) {
2274 return err;
2278 CPU_FOREACH(cpu) {
2279 err = kvm_update_guest_debug(cpu, 0);
2280 if (err) {
2281 return err;
2284 return 0;
2287 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
2288 target_ulong len, int type)
2290 struct kvm_sw_breakpoint *bp;
2291 int err;
2293 if (type == GDB_BREAKPOINT_SW) {
2294 bp = kvm_find_sw_breakpoint(cpu, addr);
2295 if (!bp) {
2296 return -ENOENT;
2299 if (bp->use_count > 1) {
2300 bp->use_count--;
2301 return 0;
2304 err = kvm_arch_remove_sw_breakpoint(cpu, bp);
2305 if (err) {
2306 return err;
2309 QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
2310 g_free(bp);
2311 } else {
2312 err = kvm_arch_remove_hw_breakpoint(addr, len, type);
2313 if (err) {
2314 return err;
2318 CPU_FOREACH(cpu) {
2319 err = kvm_update_guest_debug(cpu, 0);
2320 if (err) {
2321 return err;
2324 return 0;
2327 void kvm_remove_all_breakpoints(CPUState *cpu)
2329 struct kvm_sw_breakpoint *bp, *next;
2330 KVMState *s = cpu->kvm_state;
2331 CPUState *tmpcpu;
2333 QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
2334 if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) {
2335 /* Try harder to find a CPU that currently sees the breakpoint. */
2336 CPU_FOREACH(tmpcpu) {
2337 if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) {
2338 break;
2342 QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry);
2343 g_free(bp);
2345 kvm_arch_remove_all_hw_breakpoints();
2347 CPU_FOREACH(cpu) {
2348 kvm_update_guest_debug(cpu, 0);
2352 #else /* !KVM_CAP_SET_GUEST_DEBUG */
2354 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
2356 return -EINVAL;
2359 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
2360 target_ulong len, int type)
2362 return -EINVAL;
2365 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
2366 target_ulong len, int type)
2368 return -EINVAL;
2371 void kvm_remove_all_breakpoints(CPUState *cpu)
2374 #endif /* !KVM_CAP_SET_GUEST_DEBUG */
2376 int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset)
2378 KVMState *s = kvm_state;
2379 struct kvm_signal_mask *sigmask;
2380 int r;
2382 if (!sigset) {
2383 return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL);
2386 sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset));
2388 sigmask->len = s->sigmask_len;
2389 memcpy(sigmask->sigset, sigset, sizeof(*sigset));
2390 r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask);
2391 g_free(sigmask);
2393 return r;
2395 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
2397 return kvm_arch_on_sigbus_vcpu(cpu, code, addr);
2400 int kvm_on_sigbus(int code, void *addr)
2402 return kvm_arch_on_sigbus(code, addr);
2405 int kvm_create_device(KVMState *s, uint64_t type, bool test)
2407 int ret;
2408 struct kvm_create_device create_dev;
2410 create_dev.type = type;
2411 create_dev.fd = -1;
2412 create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
2414 if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) {
2415 return -ENOTSUP;
2418 ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev);
2419 if (ret) {
2420 return ret;
2423 return test ? 0 : create_dev.fd;
2426 bool kvm_device_supported(int vmfd, uint64_t type)
2428 struct kvm_create_device create_dev = {
2429 .type = type,
2430 .fd = -1,
2431 .flags = KVM_CREATE_DEVICE_TEST,
2434 if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) {
2435 return false;
2438 return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0);
2441 int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source)
2443 struct kvm_one_reg reg;
2444 int r;
2446 reg.id = id;
2447 reg.addr = (uintptr_t) source;
2448 r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
2449 if (r) {
2450 trace_kvm_failed_reg_set(id, strerror(-r));
2452 return r;
2455 int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target)
2457 struct kvm_one_reg reg;
2458 int r;
2460 reg.id = id;
2461 reg.addr = (uintptr_t) target;
2462 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
2463 if (r) {
2464 trace_kvm_failed_reg_get(id, strerror(-r));
2466 return r;
2469 static void kvm_accel_class_init(ObjectClass *oc, void *data)
2471 AccelClass *ac = ACCEL_CLASS(oc);
2472 ac->name = "KVM";
2473 ac->init_machine = kvm_init;
2474 ac->allowed = &kvm_allowed;
2477 static const TypeInfo kvm_accel_type = {
2478 .name = TYPE_KVM_ACCEL,
2479 .parent = TYPE_ACCEL,
2480 .class_init = kvm_accel_class_init,
2481 .instance_size = sizeof(KVMState),
2484 static void kvm_type_init(void)
2486 type_register_static(&kvm_accel_type);
2489 type_init(kvm_type_init);