s390x/sclp: propagate hmfai
[qemu/kevin.git] / kvm-all.c
blobebf35b0c5b3e3bbef411359a34273b3adaf84ebb
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 if (kvm_gsi_direct_mapping()) {
1051 return;
1054 if (!kvm_gsi_routing_enabled()) {
1055 return;
1058 s->irq_routes->flags = 0;
1059 trace_kvm_irqchip_commit_routes();
1060 ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes);
1061 assert(ret == 0);
1064 static void kvm_add_routing_entry(KVMState *s,
1065 struct kvm_irq_routing_entry *entry)
1067 struct kvm_irq_routing_entry *new;
1068 int n, size;
1070 if (s->irq_routes->nr == s->nr_allocated_irq_routes) {
1071 n = s->nr_allocated_irq_routes * 2;
1072 if (n < 64) {
1073 n = 64;
1075 size = sizeof(struct kvm_irq_routing);
1076 size += n * sizeof(*new);
1077 s->irq_routes = g_realloc(s->irq_routes, size);
1078 s->nr_allocated_irq_routes = n;
1080 n = s->irq_routes->nr++;
1081 new = &s->irq_routes->entries[n];
1083 *new = *entry;
1085 set_gsi(s, entry->gsi);
1088 static int kvm_update_routing_entry(KVMState *s,
1089 struct kvm_irq_routing_entry *new_entry)
1091 struct kvm_irq_routing_entry *entry;
1092 int n;
1094 for (n = 0; n < s->irq_routes->nr; n++) {
1095 entry = &s->irq_routes->entries[n];
1096 if (entry->gsi != new_entry->gsi) {
1097 continue;
1100 if(!memcmp(entry, new_entry, sizeof *entry)) {
1101 return 0;
1104 *entry = *new_entry;
1106 return 0;
1109 return -ESRCH;
1112 void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin)
1114 struct kvm_irq_routing_entry e = {};
1116 assert(pin < s->gsi_count);
1118 e.gsi = irq;
1119 e.type = KVM_IRQ_ROUTING_IRQCHIP;
1120 e.flags = 0;
1121 e.u.irqchip.irqchip = irqchip;
1122 e.u.irqchip.pin = pin;
1123 kvm_add_routing_entry(s, &e);
1126 void kvm_irqchip_release_virq(KVMState *s, int virq)
1128 struct kvm_irq_routing_entry *e;
1129 int i;
1131 if (kvm_gsi_direct_mapping()) {
1132 return;
1135 for (i = 0; i < s->irq_routes->nr; i++) {
1136 e = &s->irq_routes->entries[i];
1137 if (e->gsi == virq) {
1138 s->irq_routes->nr--;
1139 *e = s->irq_routes->entries[s->irq_routes->nr];
1142 clear_gsi(s, virq);
1143 kvm_arch_release_virq_post(virq);
1146 static unsigned int kvm_hash_msi(uint32_t data)
1148 /* This is optimized for IA32 MSI layout. However, no other arch shall
1149 * repeat the mistake of not providing a direct MSI injection API. */
1150 return data & 0xff;
1153 static void kvm_flush_dynamic_msi_routes(KVMState *s)
1155 KVMMSIRoute *route, *next;
1156 unsigned int hash;
1158 for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) {
1159 QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) {
1160 kvm_irqchip_release_virq(s, route->kroute.gsi);
1161 QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry);
1162 g_free(route);
1167 static int kvm_irqchip_get_virq(KVMState *s)
1169 int next_virq;
1172 * PIC and IOAPIC share the first 16 GSI numbers, thus the available
1173 * GSI numbers are more than the number of IRQ route. Allocating a GSI
1174 * number can succeed even though a new route entry cannot be added.
1175 * When this happens, flush dynamic MSI entries to free IRQ route entries.
1177 if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) {
1178 kvm_flush_dynamic_msi_routes(s);
1181 /* Return the lowest unused GSI in the bitmap */
1182 next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count);
1183 if (next_virq >= s->gsi_count) {
1184 return -ENOSPC;
1185 } else {
1186 return next_virq;
1190 static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg)
1192 unsigned int hash = kvm_hash_msi(msg.data);
1193 KVMMSIRoute *route;
1195 QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) {
1196 if (route->kroute.u.msi.address_lo == (uint32_t)msg.address &&
1197 route->kroute.u.msi.address_hi == (msg.address >> 32) &&
1198 route->kroute.u.msi.data == le32_to_cpu(msg.data)) {
1199 return route;
1202 return NULL;
1205 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1207 struct kvm_msi msi;
1208 KVMMSIRoute *route;
1210 if (kvm_direct_msi_allowed) {
1211 msi.address_lo = (uint32_t)msg.address;
1212 msi.address_hi = msg.address >> 32;
1213 msi.data = le32_to_cpu(msg.data);
1214 msi.flags = 0;
1215 memset(msi.pad, 0, sizeof(msi.pad));
1217 return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi);
1220 route = kvm_lookup_msi_route(s, msg);
1221 if (!route) {
1222 int virq;
1224 virq = kvm_irqchip_get_virq(s);
1225 if (virq < 0) {
1226 return virq;
1229 route = g_malloc0(sizeof(KVMMSIRoute));
1230 route->kroute.gsi = virq;
1231 route->kroute.type = KVM_IRQ_ROUTING_MSI;
1232 route->kroute.flags = 0;
1233 route->kroute.u.msi.address_lo = (uint32_t)msg.address;
1234 route->kroute.u.msi.address_hi = msg.address >> 32;
1235 route->kroute.u.msi.data = le32_to_cpu(msg.data);
1237 kvm_add_routing_entry(s, &route->kroute);
1238 kvm_irqchip_commit_routes(s);
1240 QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route,
1241 entry);
1244 assert(route->kroute.type == KVM_IRQ_ROUTING_MSI);
1246 return kvm_set_irq(s, route->kroute.gsi, 1);
1249 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
1251 struct kvm_irq_routing_entry kroute = {};
1252 int virq;
1253 MSIMessage msg = {0, 0};
1255 if (dev) {
1256 msg = pci_get_msi_message(dev, vector);
1259 if (kvm_gsi_direct_mapping()) {
1260 return kvm_arch_msi_data_to_gsi(msg.data);
1263 if (!kvm_gsi_routing_enabled()) {
1264 return -ENOSYS;
1267 virq = kvm_irqchip_get_virq(s);
1268 if (virq < 0) {
1269 return virq;
1272 kroute.gsi = virq;
1273 kroute.type = KVM_IRQ_ROUTING_MSI;
1274 kroute.flags = 0;
1275 kroute.u.msi.address_lo = (uint32_t)msg.address;
1276 kroute.u.msi.address_hi = msg.address >> 32;
1277 kroute.u.msi.data = le32_to_cpu(msg.data);
1278 if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
1279 kvm_irqchip_release_virq(s, virq);
1280 return -EINVAL;
1283 trace_kvm_irqchip_add_msi_route(virq);
1285 kvm_add_routing_entry(s, &kroute);
1286 kvm_arch_add_msi_route_post(&kroute, vector, dev);
1287 kvm_irqchip_commit_routes(s);
1289 return virq;
1292 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
1293 PCIDevice *dev)
1295 struct kvm_irq_routing_entry kroute = {};
1297 if (kvm_gsi_direct_mapping()) {
1298 return 0;
1301 if (!kvm_irqchip_in_kernel()) {
1302 return -ENOSYS;
1305 kroute.gsi = virq;
1306 kroute.type = KVM_IRQ_ROUTING_MSI;
1307 kroute.flags = 0;
1308 kroute.u.msi.address_lo = (uint32_t)msg.address;
1309 kroute.u.msi.address_hi = msg.address >> 32;
1310 kroute.u.msi.data = le32_to_cpu(msg.data);
1311 if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
1312 return -EINVAL;
1315 trace_kvm_irqchip_update_msi_route(virq);
1317 return kvm_update_routing_entry(s, &kroute);
1320 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq,
1321 bool assign)
1323 struct kvm_irqfd irqfd = {
1324 .fd = fd,
1325 .gsi = virq,
1326 .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
1329 if (rfd != -1) {
1330 irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE;
1331 irqfd.resamplefd = rfd;
1334 if (!kvm_irqfds_enabled()) {
1335 return -ENOSYS;
1338 return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd);
1341 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
1343 struct kvm_irq_routing_entry kroute = {};
1344 int virq;
1346 if (!kvm_gsi_routing_enabled()) {
1347 return -ENOSYS;
1350 virq = kvm_irqchip_get_virq(s);
1351 if (virq < 0) {
1352 return virq;
1355 kroute.gsi = virq;
1356 kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER;
1357 kroute.flags = 0;
1358 kroute.u.adapter.summary_addr = adapter->summary_addr;
1359 kroute.u.adapter.ind_addr = adapter->ind_addr;
1360 kroute.u.adapter.summary_offset = adapter->summary_offset;
1361 kroute.u.adapter.ind_offset = adapter->ind_offset;
1362 kroute.u.adapter.adapter_id = adapter->adapter_id;
1364 kvm_add_routing_entry(s, &kroute);
1366 return virq;
1369 int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
1371 struct kvm_irq_routing_entry kroute = {};
1372 int virq;
1374 if (!kvm_gsi_routing_enabled()) {
1375 return -ENOSYS;
1377 if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) {
1378 return -ENOSYS;
1380 virq = kvm_irqchip_get_virq(s);
1381 if (virq < 0) {
1382 return virq;
1385 kroute.gsi = virq;
1386 kroute.type = KVM_IRQ_ROUTING_HV_SINT;
1387 kroute.flags = 0;
1388 kroute.u.hv_sint.vcpu = vcpu;
1389 kroute.u.hv_sint.sint = sint;
1391 kvm_add_routing_entry(s, &kroute);
1392 kvm_irqchip_commit_routes(s);
1394 return virq;
1397 #else /* !KVM_CAP_IRQ_ROUTING */
1399 void kvm_init_irq_routing(KVMState *s)
1403 void kvm_irqchip_release_virq(KVMState *s, int virq)
1407 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1409 abort();
1412 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
1414 return -ENOSYS;
1417 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
1419 return -ENOSYS;
1422 int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
1424 return -ENOSYS;
1427 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
1429 abort();
1432 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
1434 return -ENOSYS;
1436 #endif /* !KVM_CAP_IRQ_ROUTING */
1438 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
1439 EventNotifier *rn, int virq)
1441 return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n),
1442 rn ? event_notifier_get_fd(rn) : -1, virq, true);
1445 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
1446 int virq)
1448 return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq,
1449 false);
1452 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
1453 EventNotifier *rn, qemu_irq irq)
1455 gpointer key, gsi;
1456 gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
1458 if (!found) {
1459 return -ENXIO;
1461 return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi));
1464 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n,
1465 qemu_irq irq)
1467 gpointer key, gsi;
1468 gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
1470 if (!found) {
1471 return -ENXIO;
1473 return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi));
1476 void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi)
1478 g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi));
1481 static void kvm_irqchip_create(MachineState *machine, KVMState *s)
1483 int ret;
1485 if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
1487 } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) {
1488 ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0);
1489 if (ret < 0) {
1490 fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret));
1491 exit(1);
1493 } else {
1494 return;
1497 /* First probe and see if there's a arch-specific hook to create the
1498 * in-kernel irqchip for us */
1499 ret = kvm_arch_irqchip_create(machine, s);
1500 if (ret == 0) {
1501 if (machine_kernel_irqchip_split(machine)) {
1502 perror("Split IRQ chip mode not supported.");
1503 exit(1);
1504 } else {
1505 ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP);
1508 if (ret < 0) {
1509 fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret));
1510 exit(1);
1513 kvm_kernel_irqchip = true;
1514 /* If we have an in-kernel IRQ chip then we must have asynchronous
1515 * interrupt delivery (though the reverse is not necessarily true)
1517 kvm_async_interrupts_allowed = true;
1518 kvm_halt_in_kernel_allowed = true;
1520 kvm_init_irq_routing(s);
1522 s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal);
1525 /* Find number of supported CPUs using the recommended
1526 * procedure from the kernel API documentation to cope with
1527 * older kernels that may be missing capabilities.
1529 static int kvm_recommended_vcpus(KVMState *s)
1531 int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
1532 return (ret) ? ret : 4;
1535 static int kvm_max_vcpus(KVMState *s)
1537 int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
1538 return (ret) ? ret : kvm_recommended_vcpus(s);
1541 static int kvm_max_vcpu_id(KVMState *s)
1543 int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID);
1544 return (ret) ? ret : kvm_max_vcpus(s);
1547 bool kvm_vcpu_id_is_valid(int vcpu_id)
1549 KVMState *s = KVM_STATE(current_machine->accelerator);
1550 return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s);
1553 static int kvm_init(MachineState *ms)
1555 MachineClass *mc = MACHINE_GET_CLASS(ms);
1556 static const char upgrade_note[] =
1557 "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
1558 "(see http://sourceforge.net/projects/kvm).\n";
1559 struct {
1560 const char *name;
1561 int num;
1562 } num_cpus[] = {
1563 { "SMP", smp_cpus },
1564 { "hotpluggable", max_cpus },
1565 { NULL, }
1566 }, *nc = num_cpus;
1567 int soft_vcpus_limit, hard_vcpus_limit;
1568 KVMState *s;
1569 const KVMCapabilityInfo *missing_cap;
1570 int ret;
1571 int type = 0;
1572 const char *kvm_type;
1574 s = KVM_STATE(ms->accelerator);
1577 * On systems where the kernel can support different base page
1578 * sizes, host page size may be different from TARGET_PAGE_SIZE,
1579 * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum
1580 * page size for the system though.
1582 assert(TARGET_PAGE_SIZE <= getpagesize());
1584 s->sigmask_len = 8;
1586 #ifdef KVM_CAP_SET_GUEST_DEBUG
1587 QTAILQ_INIT(&s->kvm_sw_breakpoints);
1588 #endif
1589 QLIST_INIT(&s->kvm_parked_vcpus);
1590 s->vmfd = -1;
1591 s->fd = qemu_open("/dev/kvm", O_RDWR);
1592 if (s->fd == -1) {
1593 fprintf(stderr, "Could not access KVM kernel module: %m\n");
1594 ret = -errno;
1595 goto err;
1598 ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
1599 if (ret < KVM_API_VERSION) {
1600 if (ret >= 0) {
1601 ret = -EINVAL;
1603 fprintf(stderr, "kvm version too old\n");
1604 goto err;
1607 if (ret > KVM_API_VERSION) {
1608 ret = -EINVAL;
1609 fprintf(stderr, "kvm version not supported\n");
1610 goto err;
1613 s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
1615 /* If unspecified, use the default value */
1616 if (!s->nr_slots) {
1617 s->nr_slots = 32;
1620 /* check the vcpu limits */
1621 soft_vcpus_limit = kvm_recommended_vcpus(s);
1622 hard_vcpus_limit = kvm_max_vcpus(s);
1624 while (nc->name) {
1625 if (nc->num > soft_vcpus_limit) {
1626 fprintf(stderr,
1627 "Warning: Number of %s cpus requested (%d) exceeds "
1628 "the recommended cpus supported by KVM (%d)\n",
1629 nc->name, nc->num, soft_vcpus_limit);
1631 if (nc->num > hard_vcpus_limit) {
1632 fprintf(stderr, "Number of %s cpus requested (%d) exceeds "
1633 "the maximum cpus supported by KVM (%d)\n",
1634 nc->name, nc->num, hard_vcpus_limit);
1635 exit(1);
1638 nc++;
1641 kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type");
1642 if (mc->kvm_type) {
1643 type = mc->kvm_type(kvm_type);
1644 } else if (kvm_type) {
1645 ret = -EINVAL;
1646 fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type);
1647 goto err;
1650 do {
1651 ret = kvm_ioctl(s, KVM_CREATE_VM, type);
1652 } while (ret == -EINTR);
1654 if (ret < 0) {
1655 fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret,
1656 strerror(-ret));
1658 #ifdef TARGET_S390X
1659 if (ret == -EINVAL) {
1660 fprintf(stderr,
1661 "Host kernel setup problem detected. Please verify:\n");
1662 fprintf(stderr, "- for kernels supporting the switch_amode or"
1663 " user_mode parameters, whether\n");
1664 fprintf(stderr,
1665 " user space is running in primary address space\n");
1666 fprintf(stderr,
1667 "- for kernels supporting the vm.allocate_pgste sysctl, "
1668 "whether it is enabled\n");
1670 #endif
1671 goto err;
1674 s->vmfd = ret;
1675 missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
1676 if (!missing_cap) {
1677 missing_cap =
1678 kvm_check_extension_list(s, kvm_arch_required_capabilities);
1680 if (missing_cap) {
1681 ret = -EINVAL;
1682 fprintf(stderr, "kvm does not support %s\n%s",
1683 missing_cap->name, upgrade_note);
1684 goto err;
1687 s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
1689 s->broken_set_mem_region = 1;
1690 ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS);
1691 if (ret > 0) {
1692 s->broken_set_mem_region = 0;
1695 #ifdef KVM_CAP_VCPU_EVENTS
1696 s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
1697 #endif
1699 s->robust_singlestep =
1700 kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP);
1702 #ifdef KVM_CAP_DEBUGREGS
1703 s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
1704 #endif
1706 #ifdef KVM_CAP_IRQ_ROUTING
1707 kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
1708 #endif
1710 s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3);
1712 s->irq_set_ioctl = KVM_IRQ_LINE;
1713 if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
1714 s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
1717 #ifdef KVM_CAP_READONLY_MEM
1718 kvm_readonly_mem_allowed =
1719 (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0);
1720 #endif
1722 kvm_eventfds_allowed =
1723 (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0);
1725 kvm_irqfds_allowed =
1726 (kvm_check_extension(s, KVM_CAP_IRQFD) > 0);
1728 kvm_resamplefds_allowed =
1729 (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0);
1731 kvm_vm_attributes_allowed =
1732 (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0);
1734 kvm_ioeventfd_any_length_allowed =
1735 (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0);
1737 ret = kvm_arch_init(ms, s);
1738 if (ret < 0) {
1739 goto err;
1742 if (machine_kernel_irqchip_allowed(ms)) {
1743 kvm_irqchip_create(ms, s);
1746 kvm_state = s;
1748 if (kvm_eventfds_allowed) {
1749 s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add;
1750 s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del;
1752 s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region;
1753 s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region;
1755 kvm_memory_listener_register(s, &s->memory_listener,
1756 &address_space_memory, 0);
1757 memory_listener_register(&kvm_io_listener,
1758 &address_space_io);
1760 s->many_ioeventfds = kvm_check_many_ioeventfds();
1762 cpu_interrupt_handler = kvm_handle_interrupt;
1764 return 0;
1766 err:
1767 assert(ret < 0);
1768 if (s->vmfd >= 0) {
1769 close(s->vmfd);
1771 if (s->fd != -1) {
1772 close(s->fd);
1774 g_free(s->memory_listener.slots);
1776 return ret;
1779 void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len)
1781 s->sigmask_len = sigmask_len;
1784 static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction,
1785 int size, uint32_t count)
1787 int i;
1788 uint8_t *ptr = data;
1790 for (i = 0; i < count; i++) {
1791 address_space_rw(&address_space_io, port, attrs,
1792 ptr, size,
1793 direction == KVM_EXIT_IO_OUT);
1794 ptr += size;
1798 static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run)
1800 fprintf(stderr, "KVM internal error. Suberror: %d\n",
1801 run->internal.suberror);
1803 if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
1804 int i;
1806 for (i = 0; i < run->internal.ndata; ++i) {
1807 fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
1808 i, (uint64_t)run->internal.data[i]);
1811 if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
1812 fprintf(stderr, "emulation failure\n");
1813 if (!kvm_arch_stop_on_emulation_error(cpu)) {
1814 cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE);
1815 return EXCP_INTERRUPT;
1818 /* FIXME: Should trigger a qmp message to let management know
1819 * something went wrong.
1821 return -1;
1824 void kvm_flush_coalesced_mmio_buffer(void)
1826 KVMState *s = kvm_state;
1828 if (s->coalesced_flush_in_progress) {
1829 return;
1832 s->coalesced_flush_in_progress = true;
1834 if (s->coalesced_mmio_ring) {
1835 struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
1836 while (ring->first != ring->last) {
1837 struct kvm_coalesced_mmio *ent;
1839 ent = &ring->coalesced_mmio[ring->first];
1841 cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
1842 smp_wmb();
1843 ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
1847 s->coalesced_flush_in_progress = false;
1850 static void do_kvm_cpu_synchronize_state(void *arg)
1852 CPUState *cpu = arg;
1854 if (!cpu->kvm_vcpu_dirty) {
1855 kvm_arch_get_registers(cpu);
1856 cpu->kvm_vcpu_dirty = true;
1860 void kvm_cpu_synchronize_state(CPUState *cpu)
1862 if (!cpu->kvm_vcpu_dirty) {
1863 run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu);
1867 static void do_kvm_cpu_synchronize_post_reset(void *arg)
1869 CPUState *cpu = arg;
1871 kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE);
1872 cpu->kvm_vcpu_dirty = false;
1875 void kvm_cpu_synchronize_post_reset(CPUState *cpu)
1877 run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, cpu);
1880 static void do_kvm_cpu_synchronize_post_init(void *arg)
1882 CPUState *cpu = arg;
1884 kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE);
1885 cpu->kvm_vcpu_dirty = false;
1888 void kvm_cpu_synchronize_post_init(CPUState *cpu)
1890 run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, cpu);
1893 int kvm_cpu_exec(CPUState *cpu)
1895 struct kvm_run *run = cpu->kvm_run;
1896 int ret, run_ret;
1898 DPRINTF("kvm_cpu_exec()\n");
1900 if (kvm_arch_process_async_events(cpu)) {
1901 cpu->exit_request = 0;
1902 return EXCP_HLT;
1905 qemu_mutex_unlock_iothread();
1907 do {
1908 MemTxAttrs attrs;
1910 if (cpu->kvm_vcpu_dirty) {
1911 kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE);
1912 cpu->kvm_vcpu_dirty = false;
1915 kvm_arch_pre_run(cpu, run);
1916 if (cpu->exit_request) {
1917 DPRINTF("interrupt exit requested\n");
1919 * KVM requires us to reenter the kernel after IO exits to complete
1920 * instruction emulation. This self-signal will ensure that we
1921 * leave ASAP again.
1923 qemu_cpu_kick_self();
1926 run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0);
1928 attrs = kvm_arch_post_run(cpu, run);
1930 if (run_ret < 0) {
1931 if (run_ret == -EINTR || run_ret == -EAGAIN) {
1932 DPRINTF("io window exit\n");
1933 ret = EXCP_INTERRUPT;
1934 break;
1936 fprintf(stderr, "error: kvm run failed %s\n",
1937 strerror(-run_ret));
1938 #ifdef TARGET_PPC
1939 if (run_ret == -EBUSY) {
1940 fprintf(stderr,
1941 "This is probably because your SMT is enabled.\n"
1942 "VCPU can only run on primary threads with all "
1943 "secondary threads offline.\n");
1945 #endif
1946 ret = -1;
1947 break;
1950 trace_kvm_run_exit(cpu->cpu_index, run->exit_reason);
1951 switch (run->exit_reason) {
1952 case KVM_EXIT_IO:
1953 DPRINTF("handle_io\n");
1954 /* Called outside BQL */
1955 kvm_handle_io(run->io.port, attrs,
1956 (uint8_t *)run + run->io.data_offset,
1957 run->io.direction,
1958 run->io.size,
1959 run->io.count);
1960 ret = 0;
1961 break;
1962 case KVM_EXIT_MMIO:
1963 DPRINTF("handle_mmio\n");
1964 /* Called outside BQL */
1965 address_space_rw(&address_space_memory,
1966 run->mmio.phys_addr, attrs,
1967 run->mmio.data,
1968 run->mmio.len,
1969 run->mmio.is_write);
1970 ret = 0;
1971 break;
1972 case KVM_EXIT_IRQ_WINDOW_OPEN:
1973 DPRINTF("irq_window_open\n");
1974 ret = EXCP_INTERRUPT;
1975 break;
1976 case KVM_EXIT_SHUTDOWN:
1977 DPRINTF("shutdown\n");
1978 qemu_system_reset_request();
1979 ret = EXCP_INTERRUPT;
1980 break;
1981 case KVM_EXIT_UNKNOWN:
1982 fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
1983 (uint64_t)run->hw.hardware_exit_reason);
1984 ret = -1;
1985 break;
1986 case KVM_EXIT_INTERNAL_ERROR:
1987 ret = kvm_handle_internal_error(cpu, run);
1988 break;
1989 case KVM_EXIT_SYSTEM_EVENT:
1990 switch (run->system_event.type) {
1991 case KVM_SYSTEM_EVENT_SHUTDOWN:
1992 qemu_system_shutdown_request();
1993 ret = EXCP_INTERRUPT;
1994 break;
1995 case KVM_SYSTEM_EVENT_RESET:
1996 qemu_system_reset_request();
1997 ret = EXCP_INTERRUPT;
1998 break;
1999 case KVM_SYSTEM_EVENT_CRASH:
2000 qemu_mutex_lock_iothread();
2001 qemu_system_guest_panicked();
2002 qemu_mutex_unlock_iothread();
2003 ret = 0;
2004 break;
2005 default:
2006 DPRINTF("kvm_arch_handle_exit\n");
2007 ret = kvm_arch_handle_exit(cpu, run);
2008 break;
2010 break;
2011 default:
2012 DPRINTF("kvm_arch_handle_exit\n");
2013 ret = kvm_arch_handle_exit(cpu, run);
2014 break;
2016 } while (ret == 0);
2018 qemu_mutex_lock_iothread();
2020 if (ret < 0) {
2021 cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE);
2022 vm_stop(RUN_STATE_INTERNAL_ERROR);
2025 cpu->exit_request = 0;
2026 return ret;
2029 int kvm_ioctl(KVMState *s, int type, ...)
2031 int ret;
2032 void *arg;
2033 va_list ap;
2035 va_start(ap, type);
2036 arg = va_arg(ap, void *);
2037 va_end(ap);
2039 trace_kvm_ioctl(type, arg);
2040 ret = ioctl(s->fd, type, arg);
2041 if (ret == -1) {
2042 ret = -errno;
2044 return ret;
2047 int kvm_vm_ioctl(KVMState *s, int type, ...)
2049 int ret;
2050 void *arg;
2051 va_list ap;
2053 va_start(ap, type);
2054 arg = va_arg(ap, void *);
2055 va_end(ap);
2057 trace_kvm_vm_ioctl(type, arg);
2058 ret = ioctl(s->vmfd, type, arg);
2059 if (ret == -1) {
2060 ret = -errno;
2062 return ret;
2065 int kvm_vcpu_ioctl(CPUState *cpu, int type, ...)
2067 int ret;
2068 void *arg;
2069 va_list ap;
2071 va_start(ap, type);
2072 arg = va_arg(ap, void *);
2073 va_end(ap);
2075 trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg);
2076 ret = ioctl(cpu->kvm_fd, type, arg);
2077 if (ret == -1) {
2078 ret = -errno;
2080 return ret;
2083 int kvm_device_ioctl(int fd, int type, ...)
2085 int ret;
2086 void *arg;
2087 va_list ap;
2089 va_start(ap, type);
2090 arg = va_arg(ap, void *);
2091 va_end(ap);
2093 trace_kvm_device_ioctl(fd, type, arg);
2094 ret = ioctl(fd, type, arg);
2095 if (ret == -1) {
2096 ret = -errno;
2098 return ret;
2101 int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr)
2103 int ret;
2104 struct kvm_device_attr attribute = {
2105 .group = group,
2106 .attr = attr,
2109 if (!kvm_vm_attributes_allowed) {
2110 return 0;
2113 ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute);
2114 /* kvm returns 0 on success for HAS_DEVICE_ATTR */
2115 return ret ? 0 : 1;
2118 int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr)
2120 struct kvm_device_attr attribute = {
2121 .group = group,
2122 .attr = attr,
2123 .flags = 0,
2126 return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1;
2129 void kvm_device_access(int fd, int group, uint64_t attr,
2130 void *val, bool write)
2132 struct kvm_device_attr kvmattr;
2133 int err;
2135 kvmattr.flags = 0;
2136 kvmattr.group = group;
2137 kvmattr.attr = attr;
2138 kvmattr.addr = (uintptr_t)val;
2140 err = kvm_device_ioctl(fd,
2141 write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR,
2142 &kvmattr);
2143 if (err < 0) {
2144 error_report("KVM_%s_DEVICE_ATTR failed: %s",
2145 write ? "SET" : "GET", strerror(-err));
2146 error_printf("Group %d attr 0x%016" PRIx64 "\n", group, attr);
2147 abort();
2151 int kvm_has_sync_mmu(void)
2153 return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
2156 int kvm_has_vcpu_events(void)
2158 return kvm_state->vcpu_events;
2161 int kvm_has_robust_singlestep(void)
2163 return kvm_state->robust_singlestep;
2166 int kvm_has_debugregs(void)
2168 return kvm_state->debugregs;
2171 int kvm_has_many_ioeventfds(void)
2173 if (!kvm_enabled()) {
2174 return 0;
2176 return kvm_state->many_ioeventfds;
2179 int kvm_has_gsi_routing(void)
2181 #ifdef KVM_CAP_IRQ_ROUTING
2182 return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING);
2183 #else
2184 return false;
2185 #endif
2188 int kvm_has_intx_set_mask(void)
2190 return kvm_state->intx_set_mask;
2193 void kvm_setup_guest_memory(void *start, size_t size)
2195 if (!kvm_has_sync_mmu()) {
2196 int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
2198 if (ret) {
2199 perror("qemu_madvise");
2200 fprintf(stderr,
2201 "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
2202 exit(1);
2207 #ifdef KVM_CAP_SET_GUEST_DEBUG
2208 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
2209 target_ulong pc)
2211 struct kvm_sw_breakpoint *bp;
2213 QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) {
2214 if (bp->pc == pc) {
2215 return bp;
2218 return NULL;
2221 int kvm_sw_breakpoints_active(CPUState *cpu)
2223 return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints);
2226 struct kvm_set_guest_debug_data {
2227 struct kvm_guest_debug dbg;
2228 CPUState *cpu;
2229 int err;
2232 static void kvm_invoke_set_guest_debug(void *data)
2234 struct kvm_set_guest_debug_data *dbg_data = data;
2236 dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG,
2237 &dbg_data->dbg);
2240 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
2242 struct kvm_set_guest_debug_data data;
2244 data.dbg.control = reinject_trap;
2246 if (cpu->singlestep_enabled) {
2247 data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
2249 kvm_arch_update_guest_debug(cpu, &data.dbg);
2250 data.cpu = cpu;
2252 run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data);
2253 return data.err;
2256 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
2257 target_ulong len, int type)
2259 struct kvm_sw_breakpoint *bp;
2260 int err;
2262 if (type == GDB_BREAKPOINT_SW) {
2263 bp = kvm_find_sw_breakpoint(cpu, addr);
2264 if (bp) {
2265 bp->use_count++;
2266 return 0;
2269 bp = g_malloc(sizeof(struct kvm_sw_breakpoint));
2270 bp->pc = addr;
2271 bp->use_count = 1;
2272 err = kvm_arch_insert_sw_breakpoint(cpu, bp);
2273 if (err) {
2274 g_free(bp);
2275 return err;
2278 QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
2279 } else {
2280 err = kvm_arch_insert_hw_breakpoint(addr, len, type);
2281 if (err) {
2282 return err;
2286 CPU_FOREACH(cpu) {
2287 err = kvm_update_guest_debug(cpu, 0);
2288 if (err) {
2289 return err;
2292 return 0;
2295 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
2296 target_ulong len, int type)
2298 struct kvm_sw_breakpoint *bp;
2299 int err;
2301 if (type == GDB_BREAKPOINT_SW) {
2302 bp = kvm_find_sw_breakpoint(cpu, addr);
2303 if (!bp) {
2304 return -ENOENT;
2307 if (bp->use_count > 1) {
2308 bp->use_count--;
2309 return 0;
2312 err = kvm_arch_remove_sw_breakpoint(cpu, bp);
2313 if (err) {
2314 return err;
2317 QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
2318 g_free(bp);
2319 } else {
2320 err = kvm_arch_remove_hw_breakpoint(addr, len, type);
2321 if (err) {
2322 return err;
2326 CPU_FOREACH(cpu) {
2327 err = kvm_update_guest_debug(cpu, 0);
2328 if (err) {
2329 return err;
2332 return 0;
2335 void kvm_remove_all_breakpoints(CPUState *cpu)
2337 struct kvm_sw_breakpoint *bp, *next;
2338 KVMState *s = cpu->kvm_state;
2339 CPUState *tmpcpu;
2341 QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
2342 if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) {
2343 /* Try harder to find a CPU that currently sees the breakpoint. */
2344 CPU_FOREACH(tmpcpu) {
2345 if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) {
2346 break;
2350 QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry);
2351 g_free(bp);
2353 kvm_arch_remove_all_hw_breakpoints();
2355 CPU_FOREACH(cpu) {
2356 kvm_update_guest_debug(cpu, 0);
2360 #else /* !KVM_CAP_SET_GUEST_DEBUG */
2362 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
2364 return -EINVAL;
2367 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
2368 target_ulong len, int type)
2370 return -EINVAL;
2373 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
2374 target_ulong len, int type)
2376 return -EINVAL;
2379 void kvm_remove_all_breakpoints(CPUState *cpu)
2382 #endif /* !KVM_CAP_SET_GUEST_DEBUG */
2384 int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset)
2386 KVMState *s = kvm_state;
2387 struct kvm_signal_mask *sigmask;
2388 int r;
2390 if (!sigset) {
2391 return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL);
2394 sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset));
2396 sigmask->len = s->sigmask_len;
2397 memcpy(sigmask->sigset, sigset, sizeof(*sigset));
2398 r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask);
2399 g_free(sigmask);
2401 return r;
2403 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
2405 return kvm_arch_on_sigbus_vcpu(cpu, code, addr);
2408 int kvm_on_sigbus(int code, void *addr)
2410 return kvm_arch_on_sigbus(code, addr);
2413 int kvm_create_device(KVMState *s, uint64_t type, bool test)
2415 int ret;
2416 struct kvm_create_device create_dev;
2418 create_dev.type = type;
2419 create_dev.fd = -1;
2420 create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
2422 if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) {
2423 return -ENOTSUP;
2426 ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev);
2427 if (ret) {
2428 return ret;
2431 return test ? 0 : create_dev.fd;
2434 bool kvm_device_supported(int vmfd, uint64_t type)
2436 struct kvm_create_device create_dev = {
2437 .type = type,
2438 .fd = -1,
2439 .flags = KVM_CREATE_DEVICE_TEST,
2442 if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) {
2443 return false;
2446 return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0);
2449 int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source)
2451 struct kvm_one_reg reg;
2452 int r;
2454 reg.id = id;
2455 reg.addr = (uintptr_t) source;
2456 r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
2457 if (r) {
2458 trace_kvm_failed_reg_set(id, strerror(-r));
2460 return r;
2463 int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target)
2465 struct kvm_one_reg reg;
2466 int r;
2468 reg.id = id;
2469 reg.addr = (uintptr_t) target;
2470 r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
2471 if (r) {
2472 trace_kvm_failed_reg_get(id, strerror(-r));
2474 return r;
2477 static void kvm_accel_class_init(ObjectClass *oc, void *data)
2479 AccelClass *ac = ACCEL_CLASS(oc);
2480 ac->name = "KVM";
2481 ac->init_machine = kvm_init;
2482 ac->allowed = &kvm_allowed;
2485 static const TypeInfo kvm_accel_type = {
2486 .name = TYPE_KVM_ACCEL,
2487 .parent = TYPE_ACCEL,
2488 .class_init = kvm_accel_class_init,
2489 .instance_size = sizeof(KVMState),
2492 static void kvm_type_init(void)
2494 type_register_static(&kvm_accel_type);
2497 type_init(kvm_type_init);