2 * vfio based device assignment support
4 * Copyright Red Hat, Inc. 2012
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
12 * Based on qemu-kvm device-assignment:
13 * Adapted for KVM by Qumranet.
22 #include <linux/vfio.h>
23 #include <sys/ioctl.h>
26 #include <sys/types.h>
30 #include "exec/address-spaces.h"
31 #include "exec/memory.h"
32 #include "hw/pci/msi.h"
33 #include "hw/pci/msix.h"
34 #include "hw/pci/pci.h"
35 #include "qemu-common.h"
36 #include "qemu/error-report.h"
37 #include "qemu/event_notifier.h"
38 #include "qemu/queue.h"
39 #include "qemu/range.h"
40 #include "sysemu/kvm.h"
41 #include "sysemu/sysemu.h"
43 /* #define DEBUG_VFIO */
45 #define DPRINTF(fmt, ...) \
46 do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
48 #define DPRINTF(fmt, ...) \
52 /* Extra debugging, trap acceleration paths for more logging */
53 #define VFIO_ALLOW_MMAP 1
54 #define VFIO_ALLOW_KVM_INTX 1
58 typedef struct VFIOQuirk {
60 struct VFIODevice *vdev;
61 QLIST_ENTRY(VFIOQuirk) next;
63 uint32_t base_offset:TARGET_PAGE_BITS;
64 uint32_t address_offset:TARGET_PAGE_BITS;
65 uint32_t address_size:3;
68 uint32_t address_match;
69 uint32_t address_mask;
71 uint32_t address_val:TARGET_PAGE_BITS;
72 uint32_t data_offset:TARGET_PAGE_BITS;
81 typedef struct VFIOBAR {
82 off_t fd_offset; /* offset of BAR within device fd */
83 int fd; /* device fd, allows us to pass VFIOBAR as opaque data */
84 MemoryRegion mem; /* slow, read/write access */
85 MemoryRegion mmap_mem; /* direct mapped access */
88 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
89 uint8_t nr; /* cache the BAR number for debug */
92 QLIST_HEAD(, VFIOQuirk) quirks;
95 typedef struct VFIOVGARegion {
99 QLIST_HEAD(, VFIOQuirk) quirks;
102 typedef struct VFIOVGA {
105 VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS];
108 typedef struct VFIOINTx {
109 bool pending; /* interrupt pending */
110 bool kvm_accel; /* set when QEMU bypass through KVM enabled */
111 uint8_t pin; /* which pin to pull for qemu_set_irq */
112 EventNotifier interrupt; /* eventfd triggered on interrupt */
113 EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
114 PCIINTxRoute route; /* routing info for QEMU bypass */
115 uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
116 QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */
119 typedef struct VFIOMSIVector {
120 EventNotifier interrupt; /* eventfd triggered on interrupt */
121 struct VFIODevice *vdev; /* back pointer to device */
122 MSIMessage msg; /* cache the MSI message so we know when it changes */
123 int virq; /* KVM irqchip route for QEMU bypass */
136 typedef struct VFIOContainer {
137 int fd; /* /dev/vfio/vfio, empowered by the attached groups */
139 /* enable abstraction to support various iommu backends */
141 MemoryListener listener; /* Used by type1 iommu */
143 void (*release)(struct VFIOContainer *);
145 QLIST_HEAD(, VFIOGroup) group_list;
146 QLIST_ENTRY(VFIOContainer) next;
149 /* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
150 typedef struct VFIOMSIXInfo {
154 uint32_t table_offset;
156 MemoryRegion mmap_mem;
160 typedef struct VFIODevice {
164 unsigned int config_size;
165 uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */
166 off_t config_offset; /* Offset of config space region within device fd */
167 unsigned int rom_size;
168 off_t rom_offset; /* Offset of ROM region within device fd */
171 VFIOMSIVector *msi_vectors;
173 int nr_vectors; /* Number of MSI/MSIX vectors currently in use */
174 int interrupt; /* Current interrupt type */
175 VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */
176 VFIOVGA vga; /* 0xa0000, 0x3b0, 0x3c0 */
177 PCIHostDeviceAddress host;
178 QLIST_ENTRY(VFIODevice) next;
179 struct VFIOGroup *group;
180 EventNotifier err_notifier;
182 #define VFIO_FEATURE_ENABLE_VGA_BIT 0
183 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
194 typedef struct VFIOGroup {
197 VFIOContainer *container;
198 QLIST_HEAD(, VFIODevice) device_list;
199 QLIST_ENTRY(VFIOGroup) next;
200 QLIST_ENTRY(VFIOGroup) container_next;
203 #define MSIX_CAP_LENGTH 12
205 static QLIST_HEAD(, VFIOContainer)
206 container_list = QLIST_HEAD_INITIALIZER(container_list);
208 static QLIST_HEAD(, VFIOGroup)
209 group_list = QLIST_HEAD_INITIALIZER(group_list);
211 static void vfio_disable_interrupts(VFIODevice *vdev);
212 static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
213 static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr,
214 uint32_t val, int len);
215 static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled);
218 * Common VFIO interrupt disable
220 static void vfio_disable_irqindex(VFIODevice *vdev, int index)
222 struct vfio_irq_set irq_set = {
223 .argsz = sizeof(irq_set),
224 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER,
230 ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
236 static void vfio_unmask_intx(VFIODevice *vdev)
238 struct vfio_irq_set irq_set = {
239 .argsz = sizeof(irq_set),
240 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK,
241 .index = VFIO_PCI_INTX_IRQ_INDEX,
246 ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
249 #ifdef CONFIG_KVM /* Unused outside of CONFIG_KVM code */
250 static void vfio_mask_intx(VFIODevice *vdev)
252 struct vfio_irq_set irq_set = {
253 .argsz = sizeof(irq_set),
254 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK,
255 .index = VFIO_PCI_INTX_IRQ_INDEX,
260 ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
265 * Disabling BAR mmaping can be slow, but toggling it around INTx can
266 * also be a huge overhead. We try to get the best of both worlds by
267 * waiting until an interrupt to disable mmaps (subsequent transitions
268 * to the same state are effectively no overhead). If the interrupt has
269 * been serviced and the time gap is long enough, we re-enable mmaps for
270 * performance. This works well for things like graphics cards, which
271 * may not use their interrupt at all and are penalized to an unusable
272 * level by read/write BAR traps. Other devices, like NICs, have more
273 * regular interrupts and see much better latency by staying in non-mmap
274 * mode. We therefore set the default mmap_timeout such that a ping
275 * is just enough to keep the mmap disabled. Users can experiment with
276 * other options with the x-intx-mmap-timeout-ms parameter (a value of
277 * zero disables the timer).
279 static void vfio_intx_mmap_enable(void *opaque)
281 VFIODevice *vdev = opaque;
283 if (vdev->intx.pending) {
284 timer_mod(vdev->intx.mmap_timer,
285 qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
289 vfio_mmap_set_enabled(vdev, true);
292 static void vfio_intx_interrupt(void *opaque)
294 VFIODevice *vdev = opaque;
296 if (!event_notifier_test_and_clear(&vdev->intx.interrupt)) {
300 DPRINTF("%s(%04x:%02x:%02x.%x) Pin %c\n", __func__, vdev->host.domain,
301 vdev->host.bus, vdev->host.slot, vdev->host.function,
302 'A' + vdev->intx.pin);
304 vdev->intx.pending = true;
305 pci_irq_assert(&vdev->pdev);
306 vfio_mmap_set_enabled(vdev, false);
307 if (vdev->intx.mmap_timeout) {
308 timer_mod(vdev->intx.mmap_timer,
309 qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
313 static void vfio_eoi(VFIODevice *vdev)
315 if (!vdev->intx.pending) {
319 DPRINTF("%s(%04x:%02x:%02x.%x) EOI\n", __func__, vdev->host.domain,
320 vdev->host.bus, vdev->host.slot, vdev->host.function);
322 vdev->intx.pending = false;
323 pci_irq_deassert(&vdev->pdev);
324 vfio_unmask_intx(vdev);
327 static void vfio_enable_intx_kvm(VFIODevice *vdev)
330 struct kvm_irqfd irqfd = {
331 .fd = event_notifier_get_fd(&vdev->intx.interrupt),
332 .gsi = vdev->intx.route.irq,
333 .flags = KVM_IRQFD_FLAG_RESAMPLE,
335 struct vfio_irq_set *irq_set;
339 if (!VFIO_ALLOW_KVM_INTX || !kvm_irqfds_enabled() ||
340 vdev->intx.route.mode != PCI_INTX_ENABLED ||
341 !kvm_check_extension(kvm_state, KVM_CAP_IRQFD_RESAMPLE)) {
345 /* Get to a known interrupt state */
346 qemu_set_fd_handler(irqfd.fd, NULL, NULL, vdev);
347 vfio_mask_intx(vdev);
348 vdev->intx.pending = false;
349 pci_irq_deassert(&vdev->pdev);
351 /* Get an eventfd for resample/unmask */
352 if (event_notifier_init(&vdev->intx.unmask, 0)) {
353 error_report("vfio: Error: event_notifier_init failed eoi");
357 /* KVM triggers it, VFIO listens for it */
358 irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask);
360 if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
361 error_report("vfio: Error: Failed to setup resample irqfd: %m");
365 argsz = sizeof(*irq_set) + sizeof(*pfd);
367 irq_set = g_malloc0(argsz);
368 irq_set->argsz = argsz;
369 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_UNMASK;
370 irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
373 pfd = (int32_t *)&irq_set->data;
375 *pfd = irqfd.resamplefd;
377 ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
380 error_report("vfio: Error: Failed to setup INTx unmask fd: %m");
385 vfio_unmask_intx(vdev);
387 vdev->intx.kvm_accel = true;
389 DPRINTF("%s(%04x:%02x:%02x.%x) KVM INTx accel enabled\n",
390 __func__, vdev->host.domain, vdev->host.bus,
391 vdev->host.slot, vdev->host.function);
396 irqfd.flags = KVM_IRQFD_FLAG_DEASSIGN;
397 kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd);
399 event_notifier_cleanup(&vdev->intx.unmask);
401 qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
402 vfio_unmask_intx(vdev);
406 static void vfio_disable_intx_kvm(VFIODevice *vdev)
409 struct kvm_irqfd irqfd = {
410 .fd = event_notifier_get_fd(&vdev->intx.interrupt),
411 .gsi = vdev->intx.route.irq,
412 .flags = KVM_IRQFD_FLAG_DEASSIGN,
415 if (!vdev->intx.kvm_accel) {
420 * Get to a known state, hardware masked, QEMU ready to accept new
421 * interrupts, QEMU IRQ de-asserted.
423 vfio_mask_intx(vdev);
424 vdev->intx.pending = false;
425 pci_irq_deassert(&vdev->pdev);
427 /* Tell KVM to stop listening for an INTx irqfd */
428 if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
429 error_report("vfio: Error: Failed to disable INTx irqfd: %m");
432 /* We only need to close the eventfd for VFIO to cleanup the kernel side */
433 event_notifier_cleanup(&vdev->intx.unmask);
435 /* QEMU starts listening for interrupt events. */
436 qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
438 vdev->intx.kvm_accel = false;
440 /* If we've missed an event, let it re-fire through QEMU */
441 vfio_unmask_intx(vdev);
443 DPRINTF("%s(%04x:%02x:%02x.%x) KVM INTx accel disabled\n",
444 __func__, vdev->host.domain, vdev->host.bus,
445 vdev->host.slot, vdev->host.function);
449 static void vfio_update_irq(PCIDevice *pdev)
451 VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
454 if (vdev->interrupt != VFIO_INT_INTx) {
458 route = pci_device_route_intx_to_irq(&vdev->pdev, vdev->intx.pin);
460 if (!pci_intx_route_changed(&vdev->intx.route, &route)) {
461 return; /* Nothing changed */
464 DPRINTF("%s(%04x:%02x:%02x.%x) IRQ moved %d -> %d\n", __func__,
465 vdev->host.domain, vdev->host.bus, vdev->host.slot,
466 vdev->host.function, vdev->intx.route.irq, route.irq);
468 vfio_disable_intx_kvm(vdev);
470 vdev->intx.route = route;
472 if (route.mode != PCI_INTX_ENABLED) {
476 vfio_enable_intx_kvm(vdev);
478 /* Re-enable the interrupt in cased we missed an EOI */
482 static int vfio_enable_intx(VFIODevice *vdev)
484 uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
486 struct vfio_irq_set *irq_set;
493 vfio_disable_interrupts(vdev);
495 vdev->intx.pin = pin - 1; /* Pin A (1) -> irq[0] */
496 pci_config_set_interrupt_pin(vdev->pdev.config, pin);
500 * Only conditional to avoid generating error messages on platforms
501 * where we won't actually use the result anyway.
503 if (kvm_irqfds_enabled() &&
504 kvm_check_extension(kvm_state, KVM_CAP_IRQFD_RESAMPLE)) {
505 vdev->intx.route = pci_device_route_intx_to_irq(&vdev->pdev,
510 ret = event_notifier_init(&vdev->intx.interrupt, 0);
512 error_report("vfio: Error: event_notifier_init failed");
516 argsz = sizeof(*irq_set) + sizeof(*pfd);
518 irq_set = g_malloc0(argsz);
519 irq_set->argsz = argsz;
520 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
521 irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
524 pfd = (int32_t *)&irq_set->data;
526 *pfd = event_notifier_get_fd(&vdev->intx.interrupt);
527 qemu_set_fd_handler(*pfd, vfio_intx_interrupt, NULL, vdev);
529 ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
532 error_report("vfio: Error: Failed to setup INTx fd: %m");
533 qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
534 event_notifier_cleanup(&vdev->intx.interrupt);
538 vfio_enable_intx_kvm(vdev);
540 vdev->interrupt = VFIO_INT_INTx;
542 DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
543 vdev->host.bus, vdev->host.slot, vdev->host.function);
548 static void vfio_disable_intx(VFIODevice *vdev)
552 timer_del(vdev->intx.mmap_timer);
553 vfio_disable_intx_kvm(vdev);
554 vfio_disable_irqindex(vdev, VFIO_PCI_INTX_IRQ_INDEX);
555 vdev->intx.pending = false;
556 pci_irq_deassert(&vdev->pdev);
557 vfio_mmap_set_enabled(vdev, true);
559 fd = event_notifier_get_fd(&vdev->intx.interrupt);
560 qemu_set_fd_handler(fd, NULL, NULL, vdev);
561 event_notifier_cleanup(&vdev->intx.interrupt);
563 vdev->interrupt = VFIO_INT_NONE;
565 DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
566 vdev->host.bus, vdev->host.slot, vdev->host.function);
572 static void vfio_msi_interrupt(void *opaque)
574 VFIOMSIVector *vector = opaque;
575 VFIODevice *vdev = vector->vdev;
576 int nr = vector - vdev->msi_vectors;
578 if (!event_notifier_test_and_clear(&vector->interrupt)) {
582 DPRINTF("%s(%04x:%02x:%02x.%x) vector %d\n", __func__,
583 vdev->host.domain, vdev->host.bus, vdev->host.slot,
584 vdev->host.function, nr);
586 if (vdev->interrupt == VFIO_INT_MSIX) {
587 msix_notify(&vdev->pdev, nr);
588 } else if (vdev->interrupt == VFIO_INT_MSI) {
589 msi_notify(&vdev->pdev, nr);
591 error_report("vfio: MSI interrupt receieved, but not enabled?");
595 static int vfio_enable_vectors(VFIODevice *vdev, bool msix)
597 struct vfio_irq_set *irq_set;
598 int ret = 0, i, argsz;
601 argsz = sizeof(*irq_set) + (vdev->nr_vectors * sizeof(*fds));
603 irq_set = g_malloc0(argsz);
604 irq_set->argsz = argsz;
605 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
606 irq_set->index = msix ? VFIO_PCI_MSIX_IRQ_INDEX : VFIO_PCI_MSI_IRQ_INDEX;
608 irq_set->count = vdev->nr_vectors;
609 fds = (int32_t *)&irq_set->data;
611 for (i = 0; i < vdev->nr_vectors; i++) {
612 if (!vdev->msi_vectors[i].use) {
617 fds[i] = event_notifier_get_fd(&vdev->msi_vectors[i].interrupt);
620 ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
627 static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
628 MSIMessage *msg, IOHandler *handler)
630 VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
631 VFIOMSIVector *vector;
634 DPRINTF("%s(%04x:%02x:%02x.%x) vector %d used\n", __func__,
635 vdev->host.domain, vdev->host.bus, vdev->host.slot,
636 vdev->host.function, nr);
638 vector = &vdev->msi_vectors[nr];
642 msix_vector_use(pdev, nr);
644 if (event_notifier_init(&vector->interrupt, 0)) {
645 error_report("vfio: Error: event_notifier_init failed");
649 * Attempt to enable route through KVM irqchip,
650 * default to userspace handling if unavailable.
652 vector->virq = msg ? kvm_irqchip_add_msi_route(kvm_state, *msg) : -1;
653 if (vector->virq < 0 ||
654 kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt,
655 NULL, vector->virq) < 0) {
656 if (vector->virq >= 0) {
657 kvm_irqchip_release_virq(kvm_state, vector->virq);
660 qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
661 handler, NULL, vector);
665 * We don't want to have the host allocate all possible MSI vectors
666 * for a device if they're not in use, so we shutdown and incrementally
667 * increase them as needed.
669 if (vdev->nr_vectors < nr + 1) {
670 vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX);
671 vdev->nr_vectors = nr + 1;
672 ret = vfio_enable_vectors(vdev, true);
674 error_report("vfio: failed to enable vectors, %d", ret);
678 struct vfio_irq_set *irq_set;
681 argsz = sizeof(*irq_set) + sizeof(*pfd);
683 irq_set = g_malloc0(argsz);
684 irq_set->argsz = argsz;
685 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
686 VFIO_IRQ_SET_ACTION_TRIGGER;
687 irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
690 pfd = (int32_t *)&irq_set->data;
692 *pfd = event_notifier_get_fd(&vector->interrupt);
694 ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
697 error_report("vfio: failed to modify vector, %d", ret);
704 static int vfio_msix_vector_use(PCIDevice *pdev,
705 unsigned int nr, MSIMessage msg)
707 return vfio_msix_vector_do_use(pdev, nr, &msg, vfio_msi_interrupt);
710 static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr)
712 VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
713 VFIOMSIVector *vector = &vdev->msi_vectors[nr];
715 struct vfio_irq_set *irq_set;
718 DPRINTF("%s(%04x:%02x:%02x.%x) vector %d released\n", __func__,
719 vdev->host.domain, vdev->host.bus, vdev->host.slot,
720 vdev->host.function, nr);
723 * XXX What's the right thing to do here? This turns off the interrupt
724 * completely, but do we really just want to switch the interrupt to
725 * bouncing through userspace and let msix.c drop it? Not sure.
727 msix_vector_unuse(pdev, nr);
729 argsz = sizeof(*irq_set) + sizeof(*pfd);
731 irq_set = g_malloc0(argsz);
732 irq_set->argsz = argsz;
733 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
734 VFIO_IRQ_SET_ACTION_TRIGGER;
735 irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
738 pfd = (int32_t *)&irq_set->data;
742 ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
746 if (vector->virq < 0) {
747 qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
750 kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->interrupt,
752 kvm_irqchip_release_virq(kvm_state, vector->virq);
756 event_notifier_cleanup(&vector->interrupt);
760 static void vfio_enable_msix(VFIODevice *vdev)
762 vfio_disable_interrupts(vdev);
764 vdev->msi_vectors = g_malloc0(vdev->msix->entries * sizeof(VFIOMSIVector));
766 vdev->interrupt = VFIO_INT_MSIX;
769 * Some communication channels between VF & PF or PF & fw rely on the
770 * physical state of the device and expect that enabling MSI-X from the
771 * guest enables the same on the host. When our guest is Linux, the
772 * guest driver call to pci_enable_msix() sets the enabling bit in the
773 * MSI-X capability, but leaves the vector table masked. We therefore
774 * can't rely on a vector_use callback (from request_irq() in the guest)
775 * to switch the physical device into MSI-X mode because that may come a
776 * long time after pci_enable_msix(). This code enables vector 0 with
777 * triggering to userspace, then immediately release the vector, leaving
778 * the physical device with no vectors enabled, but MSI-X enabled, just
779 * like the guest view.
781 vfio_msix_vector_do_use(&vdev->pdev, 0, NULL, NULL);
782 vfio_msix_vector_release(&vdev->pdev, 0);
784 if (msix_set_vector_notifiers(&vdev->pdev, vfio_msix_vector_use,
785 vfio_msix_vector_release, NULL)) {
786 error_report("vfio: msix_set_vector_notifiers failed");
789 DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
790 vdev->host.bus, vdev->host.slot, vdev->host.function);
793 static void vfio_enable_msi(VFIODevice *vdev)
797 vfio_disable_interrupts(vdev);
799 vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
801 vdev->msi_vectors = g_malloc0(vdev->nr_vectors * sizeof(VFIOMSIVector));
803 for (i = 0; i < vdev->nr_vectors; i++) {
804 VFIOMSIVector *vector = &vdev->msi_vectors[i];
809 if (event_notifier_init(&vector->interrupt, 0)) {
810 error_report("vfio: Error: event_notifier_init failed");
813 vector->msg = msi_get_message(&vdev->pdev, i);
816 * Attempt to enable route through KVM irqchip,
817 * default to userspace handling if unavailable.
819 vector->virq = kvm_irqchip_add_msi_route(kvm_state, vector->msg);
820 if (vector->virq < 0 ||
821 kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->interrupt,
822 NULL, vector->virq) < 0) {
823 qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
824 vfio_msi_interrupt, NULL, vector);
828 ret = vfio_enable_vectors(vdev, false);
831 error_report("vfio: Error: Failed to setup MSI fds: %m");
832 } else if (ret != vdev->nr_vectors) {
833 error_report("vfio: Error: Failed to enable %d "
834 "MSI vectors, retry with %d", vdev->nr_vectors, ret);
837 for (i = 0; i < vdev->nr_vectors; i++) {
838 VFIOMSIVector *vector = &vdev->msi_vectors[i];
839 if (vector->virq >= 0) {
840 kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->interrupt,
842 kvm_irqchip_release_virq(kvm_state, vector->virq);
845 qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
848 event_notifier_cleanup(&vector->interrupt);
851 g_free(vdev->msi_vectors);
853 if (ret > 0 && ret != vdev->nr_vectors) {
854 vdev->nr_vectors = ret;
857 vdev->nr_vectors = 0;
862 vdev->interrupt = VFIO_INT_MSI;
864 DPRINTF("%s(%04x:%02x:%02x.%x) Enabled %d MSI vectors\n", __func__,
865 vdev->host.domain, vdev->host.bus, vdev->host.slot,
866 vdev->host.function, vdev->nr_vectors);
869 static void vfio_disable_msi_common(VFIODevice *vdev)
871 g_free(vdev->msi_vectors);
872 vdev->msi_vectors = NULL;
873 vdev->nr_vectors = 0;
874 vdev->interrupt = VFIO_INT_NONE;
876 vfio_enable_intx(vdev);
879 static void vfio_disable_msix(VFIODevice *vdev)
881 msix_unset_vector_notifiers(&vdev->pdev);
883 if (vdev->nr_vectors) {
884 vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX);
887 vfio_disable_msi_common(vdev);
889 DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
890 vdev->host.bus, vdev->host.slot, vdev->host.function);
893 static void vfio_disable_msi(VFIODevice *vdev)
897 vfio_disable_irqindex(vdev, VFIO_PCI_MSI_IRQ_INDEX);
899 for (i = 0; i < vdev->nr_vectors; i++) {
900 VFIOMSIVector *vector = &vdev->msi_vectors[i];
906 if (vector->virq >= 0) {
907 kvm_irqchip_remove_irqfd_notifier(kvm_state,
908 &vector->interrupt, vector->virq);
909 kvm_irqchip_release_virq(kvm_state, vector->virq);
912 qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
916 event_notifier_cleanup(&vector->interrupt);
919 vfio_disable_msi_common(vdev);
921 DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
922 vdev->host.bus, vdev->host.slot, vdev->host.function);
925 static void vfio_update_msi(VFIODevice *vdev)
929 for (i = 0; i < vdev->nr_vectors; i++) {
930 VFIOMSIVector *vector = &vdev->msi_vectors[i];
933 if (!vector->use || vector->virq < 0) {
937 msg = msi_get_message(&vdev->pdev, i);
939 if (msg.address != vector->msg.address ||
940 msg.data != vector->msg.data) {
942 DPRINTF("%s(%04x:%02x:%02x.%x) MSI vector %d changed\n",
943 __func__, vdev->host.domain, vdev->host.bus,
944 vdev->host.slot, vdev->host.function, i);
946 kvm_irqchip_update_msi_route(kvm_state, vector->virq, msg);
953 * IO Port/MMIO - Beware of the endians, VFIO is always little endian
955 static void vfio_bar_write(void *opaque, hwaddr addr,
956 uint64_t data, unsigned size)
958 VFIOBAR *bar = opaque;
971 buf.word = cpu_to_le16(data);
974 buf.dword = cpu_to_le32(data);
977 hw_error("vfio: unsupported write size, %d bytes\n", size);
981 if (pwrite(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
982 error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m",
983 __func__, addr, data, size);
988 VFIODevice *vdev = container_of(bar, VFIODevice, bars[bar->nr]);
990 DPRINTF("%s(%04x:%02x:%02x.%x:BAR%d+0x%"HWADDR_PRIx", 0x%"PRIx64
991 ", %d)\n", __func__, vdev->host.domain, vdev->host.bus,
992 vdev->host.slot, vdev->host.function, bar->nr, addr,
998 * A read or write to a BAR always signals an INTx EOI. This will
999 * do nothing if not pending (including not in INTx mode). We assume
1000 * that a BAR access is in response to an interrupt and that BAR
1001 * accesses will service the interrupt. Unfortunately, we don't know
1002 * which access will service the interrupt, so we're potentially
1003 * getting quite a few host interrupts per guest interrupt.
1005 vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr]));
1008 static uint64_t vfio_bar_read(void *opaque,
1009 hwaddr addr, unsigned size)
1011 VFIOBAR *bar = opaque;
1020 if (pread(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
1021 error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m",
1022 __func__, addr, size);
1023 return (uint64_t)-1;
1031 data = le16_to_cpu(buf.word);
1034 data = le32_to_cpu(buf.dword);
1037 hw_error("vfio: unsupported read size, %d bytes\n", size);
1043 VFIODevice *vdev = container_of(bar, VFIODevice, bars[bar->nr]);
1045 DPRINTF("%s(%04x:%02x:%02x.%x:BAR%d+0x%"HWADDR_PRIx
1046 ", %d) = 0x%"PRIx64"\n", __func__, vdev->host.domain,
1047 vdev->host.bus, vdev->host.slot, vdev->host.function,
1048 bar->nr, addr, size, data);
1052 /* Same as write above */
1053 vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr]));
1058 static const MemoryRegionOps vfio_bar_ops = {
1059 .read = vfio_bar_read,
1060 .write = vfio_bar_write,
1061 .endianness = DEVICE_LITTLE_ENDIAN,
1064 static void vfio_pci_load_rom(VFIODevice *vdev)
1066 struct vfio_region_info reg_info = {
1067 .argsz = sizeof(reg_info),
1068 .index = VFIO_PCI_ROM_REGION_INDEX
1074 if (ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info)) {
1075 error_report("vfio: Error getting ROM info: %m");
1079 DPRINTF("Device %04x:%02x:%02x.%x ROM:\n", vdev->host.domain,
1080 vdev->host.bus, vdev->host.slot, vdev->host.function);
1081 DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
1082 (unsigned long)reg_info.size, (unsigned long)reg_info.offset,
1083 (unsigned long)reg_info.flags);
1085 vdev->rom_size = size = reg_info.size;
1086 vdev->rom_offset = reg_info.offset;
1088 if (!vdev->rom_size) {
1092 vdev->rom = g_malloc(size);
1093 memset(vdev->rom, 0xff, size);
1096 bytes = pread(vdev->fd, vdev->rom + off, size, vdev->rom_offset + off);
1099 } else if (bytes > 0) {
1103 if (errno == EINTR || errno == EAGAIN) {
1106 error_report("vfio: Error reading device ROM: %m");
1112 static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size)
1114 VFIODevice *vdev = opaque;
1115 uint64_t val = ((uint64_t)1 << (size * 8)) - 1;
1117 /* Load the ROM lazily when the guest tries to read it */
1118 if (unlikely(!vdev->rom)) {
1119 vfio_pci_load_rom(vdev);
1122 memcpy(&val, vdev->rom + addr,
1123 (addr < vdev->rom_size) ? MIN(size, vdev->rom_size - addr) : 0);
1125 DPRINTF("%s(%04x:%02x:%02x.%x, 0x%"HWADDR_PRIx", 0x%x) = 0x%"PRIx64"\n",
1126 __func__, vdev->host.domain, vdev->host.bus, vdev->host.slot,
1127 vdev->host.function, addr, size, val);
1132 static void vfio_rom_write(void *opaque, hwaddr addr,
1133 uint64_t data, unsigned size)
1137 static const MemoryRegionOps vfio_rom_ops = {
1138 .read = vfio_rom_read,
1139 .write = vfio_rom_write,
1140 .endianness = DEVICE_LITTLE_ENDIAN,
1143 static void vfio_pci_size_rom(VFIODevice *vdev)
1145 uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK);
1146 off_t offset = vdev->config_offset + PCI_ROM_ADDRESS;
1149 if (vdev->pdev.romfile || !vdev->pdev.rom_bar) {
1154 * Use the same size ROM BAR as the physical device. The contents
1155 * will get filled in later when the guest tries to read it.
1157 if (pread(vdev->fd, &orig, 4, offset) != 4 ||
1158 pwrite(vdev->fd, &size, 4, offset) != 4 ||
1159 pread(vdev->fd, &size, 4, offset) != 4 ||
1160 pwrite(vdev->fd, &orig, 4, offset) != 4) {
1161 error_report("%s(%04x:%02x:%02x.%x) failed: %m",
1162 __func__, vdev->host.domain, vdev->host.bus,
1163 vdev->host.slot, vdev->host.function);
1167 size = ~(le32_to_cpu(size) & PCI_ROM_ADDRESS_MASK) + 1;
1173 DPRINTF("%04x:%02x:%02x.%x ROM size 0x%x\n", vdev->host.domain,
1174 vdev->host.bus, vdev->host.slot, vdev->host.function, size);
1176 snprintf(name, sizeof(name), "vfio[%04x:%02x:%02x.%x].rom",
1177 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1178 vdev->host.function);
1180 memory_region_init_io(&vdev->pdev.rom, OBJECT(vdev),
1181 &vfio_rom_ops, vdev, name, size);
1183 pci_register_bar(&vdev->pdev, PCI_ROM_SLOT,
1184 PCI_BASE_ADDRESS_SPACE_MEMORY, &vdev->pdev.rom);
1186 vdev->pdev.has_rom = true;
1189 static void vfio_vga_write(void *opaque, hwaddr addr,
1190 uint64_t data, unsigned size)
1192 VFIOVGARegion *region = opaque;
1193 VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
1200 off_t offset = vga->fd_offset + region->offset + addr;
1207 buf.word = cpu_to_le16(data);
1210 buf.dword = cpu_to_le32(data);
1213 hw_error("vfio: unsupported write size, %d bytes\n", size);
1217 if (pwrite(vga->fd, &buf, size, offset) != size) {
1218 error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m",
1219 __func__, region->offset + addr, data, size);
1222 DPRINTF("%s(0x%"HWADDR_PRIx", 0x%"PRIx64", %d)\n",
1223 __func__, region->offset + addr, data, size);
1226 static uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size)
1228 VFIOVGARegion *region = opaque;
1229 VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
1237 off_t offset = vga->fd_offset + region->offset + addr;
1239 if (pread(vga->fd, &buf, size, offset) != size) {
1240 error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m",
1241 __func__, region->offset + addr, size);
1242 return (uint64_t)-1;
1250 data = le16_to_cpu(buf.word);
1253 data = le32_to_cpu(buf.dword);
1256 hw_error("vfio: unsupported read size, %d bytes\n", size);
1260 DPRINTF("%s(0x%"HWADDR_PRIx", %d) = 0x%"PRIx64"\n",
1261 __func__, region->offset + addr, size, data);
1266 static const MemoryRegionOps vfio_vga_ops = {
1267 .read = vfio_vga_read,
1268 .write = vfio_vga_write,
1269 .endianness = DEVICE_LITTLE_ENDIAN,
1273 * Device specific quirks
1276 /* Is range1 fully contained within range2? */
1277 static bool vfio_range_contained(uint64_t first1, uint64_t len1,
1278 uint64_t first2, uint64_t len2) {
1279 return (first1 >= first2 && first1 + len1 <= first2 + len2);
1282 static bool vfio_flags_enabled(uint8_t flags, uint8_t mask)
1284 return (mask && (flags & mask) == mask);
1287 static uint64_t vfio_generic_window_quirk_read(void *opaque,
1288 hwaddr addr, unsigned size)
1290 VFIOQuirk *quirk = opaque;
1291 VFIODevice *vdev = quirk->vdev;
1294 if (vfio_flags_enabled(quirk->data.flags, quirk->data.read_flags) &&
1295 ranges_overlap(addr, size,
1296 quirk->data.data_offset, quirk->data.data_size)) {
1297 hwaddr offset = addr - quirk->data.data_offset;
1299 if (!vfio_range_contained(addr, size, quirk->data.data_offset,
1300 quirk->data.data_size)) {
1301 hw_error("%s: window data read not fully contained: %s\n",
1302 __func__, memory_region_name(&quirk->mem));
1305 data = vfio_pci_read_config(&vdev->pdev,
1306 quirk->data.address_val + offset, size);
1308 DPRINTF("%s read(%04x:%02x:%02x.%x:BAR%d+0x%"HWADDR_PRIx", %d) = 0x%"
1309 PRIx64"\n", memory_region_name(&quirk->mem), vdev->host.domain,
1310 vdev->host.bus, vdev->host.slot, vdev->host.function,
1311 quirk->data.bar, addr, size, data);
1313 data = vfio_bar_read(&vdev->bars[quirk->data.bar],
1314 addr + quirk->data.base_offset, size);
1320 static void vfio_generic_window_quirk_write(void *opaque, hwaddr addr,
1321 uint64_t data, unsigned size)
1323 VFIOQuirk *quirk = opaque;
1324 VFIODevice *vdev = quirk->vdev;
1326 if (ranges_overlap(addr, size,
1327 quirk->data.address_offset, quirk->data.address_size)) {
1329 if (addr != quirk->data.address_offset) {
1330 hw_error("%s: offset write into address window: %s\n",
1331 __func__, memory_region_name(&quirk->mem));
1334 if ((data & ~quirk->data.address_mask) == quirk->data.address_match) {
1335 quirk->data.flags |= quirk->data.write_flags |
1336 quirk->data.read_flags;
1337 quirk->data.address_val = data & quirk->data.address_mask;
1339 quirk->data.flags &= ~(quirk->data.write_flags |
1340 quirk->data.read_flags);
1344 if (vfio_flags_enabled(quirk->data.flags, quirk->data.write_flags) &&
1345 ranges_overlap(addr, size,
1346 quirk->data.data_offset, quirk->data.data_size)) {
1347 hwaddr offset = addr - quirk->data.data_offset;
1349 if (!vfio_range_contained(addr, size, quirk->data.data_offset,
1350 quirk->data.data_size)) {
1351 hw_error("%s: window data write not fully contained: %s\n",
1352 __func__, memory_region_name(&quirk->mem));
1355 vfio_pci_write_config(&vdev->pdev,
1356 quirk->data.address_val + offset, data, size);
1357 DPRINTF("%s write(%04x:%02x:%02x.%x:BAR%d+0x%"HWADDR_PRIx", 0x%"
1358 PRIx64", %d)\n", memory_region_name(&quirk->mem),
1359 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1360 vdev->host.function, quirk->data.bar, addr, data, size);
1364 vfio_bar_write(&vdev->bars[quirk->data.bar],
1365 addr + quirk->data.base_offset, data, size);
1368 static const MemoryRegionOps vfio_generic_window_quirk = {
1369 .read = vfio_generic_window_quirk_read,
1370 .write = vfio_generic_window_quirk_write,
1371 .endianness = DEVICE_LITTLE_ENDIAN,
1374 static uint64_t vfio_generic_quirk_read(void *opaque,
1375 hwaddr addr, unsigned size)
1377 VFIOQuirk *quirk = opaque;
1378 VFIODevice *vdev = quirk->vdev;
1379 hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
1380 hwaddr offset = quirk->data.address_match & ~TARGET_PAGE_MASK;
1383 if (vfio_flags_enabled(quirk->data.flags, quirk->data.read_flags) &&
1384 ranges_overlap(addr, size, offset, quirk->data.address_mask + 1)) {
1385 if (!vfio_range_contained(addr, size, offset,
1386 quirk->data.address_mask + 1)) {
1387 hw_error("%s: read not fully contained: %s\n",
1388 __func__, memory_region_name(&quirk->mem));
1391 data = vfio_pci_read_config(&vdev->pdev, addr - offset, size);
1393 DPRINTF("%s read(%04x:%02x:%02x.%x:BAR%d+0x%"HWADDR_PRIx", %d) = 0x%"
1394 PRIx64"\n", memory_region_name(&quirk->mem), vdev->host.domain,
1395 vdev->host.bus, vdev->host.slot, vdev->host.function,
1396 quirk->data.bar, addr + base, size, data);
1398 data = vfio_bar_read(&vdev->bars[quirk->data.bar], addr + base, size);
1404 static void vfio_generic_quirk_write(void *opaque, hwaddr addr,
1405 uint64_t data, unsigned size)
1407 VFIOQuirk *quirk = opaque;
1408 VFIODevice *vdev = quirk->vdev;
1409 hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
1410 hwaddr offset = quirk->data.address_match & ~TARGET_PAGE_MASK;
1412 if (vfio_flags_enabled(quirk->data.flags, quirk->data.write_flags) &&
1413 ranges_overlap(addr, size, offset, quirk->data.address_mask + 1)) {
1414 if (!vfio_range_contained(addr, size, offset,
1415 quirk->data.address_mask + 1)) {
1416 hw_error("%s: write not fully contained: %s\n",
1417 __func__, memory_region_name(&quirk->mem));
1420 vfio_pci_write_config(&vdev->pdev, addr - offset, data, size);
1422 DPRINTF("%s write(%04x:%02x:%02x.%x:BAR%d+0x%"HWADDR_PRIx", 0x%"
1423 PRIx64", %d)\n", memory_region_name(&quirk->mem),
1424 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1425 vdev->host.function, quirk->data.bar, addr + base, data, size);
1427 vfio_bar_write(&vdev->bars[quirk->data.bar], addr + base, data, size);
1431 static const MemoryRegionOps vfio_generic_quirk = {
1432 .read = vfio_generic_quirk_read,
1433 .write = vfio_generic_quirk_write,
1434 .endianness = DEVICE_LITTLE_ENDIAN,
1437 #define PCI_VENDOR_ID_ATI 0x1002
1440 * Radeon HD cards (HD5450 & HD7850) report the upper byte of the I/O port BAR
1441 * through VGA register 0x3c3. On newer cards, the I/O port BAR is always
1442 * BAR4 (older cards like the X550 used BAR1, but we don't care to support
1443 * those). Note that on bare metal, a read of 0x3c3 doesn't always return the
1444 * I/O port BAR address. Originally this was coded to return the virtual BAR
1445 * address only if the physical register read returns the actual BAR address,
1446 * but users have reported greater success if we return the virtual address
1449 static uint64_t vfio_ati_3c3_quirk_read(void *opaque,
1450 hwaddr addr, unsigned size)
1452 VFIOQuirk *quirk = opaque;
1453 VFIODevice *vdev = quirk->vdev;
1454 uint64_t data = vfio_pci_read_config(&vdev->pdev,
1455 PCI_BASE_ADDRESS_0 + (4 * 4) + 1,
1457 DPRINTF("%s(0x3c3, 1) = 0x%"PRIx64"\n", __func__, data);
1462 static const MemoryRegionOps vfio_ati_3c3_quirk = {
1463 .read = vfio_ati_3c3_quirk_read,
1464 .endianness = DEVICE_LITTLE_ENDIAN,
1467 static void vfio_vga_probe_ati_3c3_quirk(VFIODevice *vdev)
1469 PCIDevice *pdev = &vdev->pdev;
1472 if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
1477 * As long as the BAR is >= 256 bytes it will be aligned such that the
1478 * lower byte is always zero. Filter out anything else, if it exists.
1480 if (!vdev->bars[4].ioport || vdev->bars[4].size < 256) {
1484 quirk = g_malloc0(sizeof(*quirk));
1487 memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_ati_3c3_quirk, quirk,
1488 "vfio-ati-3c3-quirk", 1);
1489 memory_region_add_subregion(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
1490 3 /* offset 3 bytes from 0x3c0 */, &quirk->mem);
1492 QLIST_INSERT_HEAD(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks,
1495 DPRINTF("Enabled ATI/AMD quirk 0x3c3 BAR4for device %04x:%02x:%02x.%x\n",
1496 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1497 vdev->host.function);
1501 * Newer ATI/AMD devices, including HD5450 and HD7850, have a window to PCI
1502 * config space through MMIO BAR2 at offset 0x4000. Nothing seems to access
1503 * the MMIO space directly, but a window to this space is provided through
1504 * I/O port BAR4. Offset 0x0 is the address register and offset 0x4 is the
1505 * data register. When the address is programmed to a range of 0x4000-0x4fff
1506 * PCI configuration space is available. Experimentation seems to indicate
1507 * that only read-only access is provided, but we drop writes when the window
1508 * is enabled to config space nonetheless.
1510 static void vfio_probe_ati_bar4_window_quirk(VFIODevice *vdev, int nr)
1512 PCIDevice *pdev = &vdev->pdev;
1515 if (!vdev->has_vga || nr != 4 ||
1516 pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
1520 quirk = g_malloc0(sizeof(*quirk));
1522 quirk->data.address_size = 4;
1523 quirk->data.data_offset = 4;
1524 quirk->data.data_size = 4;
1525 quirk->data.address_match = 0x4000;
1526 quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
1527 quirk->data.bar = nr;
1528 quirk->data.read_flags = quirk->data.write_flags = 1;
1530 memory_region_init_io(&quirk->mem, OBJECT(vdev),
1531 &vfio_generic_window_quirk, quirk,
1532 "vfio-ati-bar4-window-quirk", 8);
1533 memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
1534 quirk->data.base_offset, &quirk->mem, 1);
1536 QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
1538 DPRINTF("Enabled ATI/AMD BAR4 window quirk for device %04x:%02x:%02x.%x\n",
1539 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1540 vdev->host.function);
1544 * Trap the BAR2 MMIO window to config space as well.
1546 static void vfio_probe_ati_bar2_4000_quirk(VFIODevice *vdev, int nr)
1548 PCIDevice *pdev = &vdev->pdev;
1551 /* Only enable on newer devices where BAR2 is 64bit */
1552 if (!vdev->has_vga || nr != 2 || !vdev->bars[2].mem64 ||
1553 pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
1557 quirk = g_malloc0(sizeof(*quirk));
1559 quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
1560 quirk->data.address_match = 0x4000;
1561 quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
1562 quirk->data.bar = nr;
1564 memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_generic_quirk, quirk,
1565 "vfio-ati-bar2-4000-quirk",
1566 TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
1567 memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
1568 quirk->data.address_match & TARGET_PAGE_MASK,
1571 QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
1573 DPRINTF("Enabled ATI/AMD BAR2 0x4000 quirk for device %04x:%02x:%02x.%x\n",
1574 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1575 vdev->host.function);
1579 * Older ATI/AMD cards like the X550 have a similar window to that above.
1580 * I/O port BAR1 provides a window to a mirror of PCI config space located
1581 * in BAR2 at offset 0xf00. We don't care to support such older cards, but
1582 * note it for future reference.
1585 #define PCI_VENDOR_ID_NVIDIA 0x10de
1588 * Nvidia has several different methods to get to config space, the
1589 * nouveu project has several of these documented here:
1590 * https://github.com/pathscale/envytools/tree/master/hwdocs
1592 * The first quirk is actually not documented in envytools and is found
1593 * on 10de:01d1 (NVIDIA Corporation G72 [GeForce 7300 LE]). This is an
1594 * NV46 chipset. The backdoor uses the legacy VGA I/O ports to access
1595 * the mirror of PCI config space found at BAR0 offset 0x1800. The access
1596 * sequence first writes 0x338 to I/O port 0x3d4. The target offset is
1597 * then written to 0x3d0. Finally 0x538 is written for a read and 0x738
1598 * is written for a write to 0x3d4. The BAR0 offset is then accessible
1599 * through 0x3d0. This quirk doesn't seem to be necessary on newer cards
1600 * that use the I/O port BAR5 window but it doesn't hurt to leave it.
1610 static uint64_t vfio_nvidia_3d0_quirk_read(void *opaque,
1611 hwaddr addr, unsigned size)
1613 VFIOQuirk *quirk = opaque;
1614 VFIODevice *vdev = quirk->vdev;
1615 PCIDevice *pdev = &vdev->pdev;
1616 uint64_t data = vfio_vga_read(&vdev->vga.region[QEMU_PCI_VGA_IO_HI],
1617 addr + quirk->data.base_offset, size);
1619 if (quirk->data.flags == NV_3D0_READ && addr == quirk->data.data_offset) {
1620 data = vfio_pci_read_config(pdev, quirk->data.address_val, size);
1621 DPRINTF("%s(0x3d0, %d) = 0x%"PRIx64"\n", __func__, size, data);
1624 quirk->data.flags = NV_3D0_NONE;
1629 static void vfio_nvidia_3d0_quirk_write(void *opaque, hwaddr addr,
1630 uint64_t data, unsigned size)
1632 VFIOQuirk *quirk = opaque;
1633 VFIODevice *vdev = quirk->vdev;
1634 PCIDevice *pdev = &vdev->pdev;
1636 switch (quirk->data.flags) {
1638 if (addr == quirk->data.address_offset && data == 0x338) {
1639 quirk->data.flags = NV_3D0_SELECT;
1643 quirk->data.flags = NV_3D0_NONE;
1644 if (addr == quirk->data.data_offset &&
1645 (data & ~quirk->data.address_mask) == quirk->data.address_match) {
1646 quirk->data.flags = NV_3D0_WINDOW;
1647 quirk->data.address_val = data & quirk->data.address_mask;
1651 quirk->data.flags = NV_3D0_NONE;
1652 if (addr == quirk->data.address_offset) {
1653 if (data == 0x538) {
1654 quirk->data.flags = NV_3D0_READ;
1655 } else if (data == 0x738) {
1656 quirk->data.flags = NV_3D0_WRITE;
1661 quirk->data.flags = NV_3D0_NONE;
1662 if (addr == quirk->data.data_offset) {
1663 vfio_pci_write_config(pdev, quirk->data.address_val, data, size);
1664 DPRINTF("%s(0x3d0, 0x%"PRIx64", %d)\n", __func__, data, size);
1670 vfio_vga_write(&vdev->vga.region[QEMU_PCI_VGA_IO_HI],
1671 addr + quirk->data.base_offset, data, size);
1674 static const MemoryRegionOps vfio_nvidia_3d0_quirk = {
1675 .read = vfio_nvidia_3d0_quirk_read,
1676 .write = vfio_nvidia_3d0_quirk_write,
1677 .endianness = DEVICE_LITTLE_ENDIAN,
1680 static void vfio_vga_probe_nvidia_3d0_quirk(VFIODevice *vdev)
1682 PCIDevice *pdev = &vdev->pdev;
1685 if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA ||
1686 !vdev->bars[1].size) {
1690 quirk = g_malloc0(sizeof(*quirk));
1692 quirk->data.base_offset = 0x10;
1693 quirk->data.address_offset = 4;
1694 quirk->data.address_size = 2;
1695 quirk->data.address_match = 0x1800;
1696 quirk->data.address_mask = PCI_CONFIG_SPACE_SIZE - 1;
1697 quirk->data.data_offset = 0;
1698 quirk->data.data_size = 4;
1700 memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_nvidia_3d0_quirk,
1701 quirk, "vfio-nvidia-3d0-quirk", 6);
1702 memory_region_add_subregion(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
1703 quirk->data.base_offset, &quirk->mem);
1705 QLIST_INSERT_HEAD(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks,
1708 DPRINTF("Enabled NVIDIA VGA 0x3d0 quirk for device %04x:%02x:%02x.%x\n",
1709 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1710 vdev->host.function);
1714 * The second quirk is documented in envytools. The I/O port BAR5 is just
1715 * a set of address/data ports to the MMIO BARs. The BAR we care about is
1716 * again BAR0. This backdoor is apparently a bit newer than the one above
1717 * so we need to not only trap 256 bytes @0x1800, but all of PCI config
1718 * space, including extended space is available at the 4k @0x88000.
1721 NV_BAR5_ADDRESS = 0x1,
1722 NV_BAR5_ENABLE = 0x2,
1723 NV_BAR5_MASTER = 0x4,
1724 NV_BAR5_VALID = 0x7,
1727 static void vfio_nvidia_bar5_window_quirk_write(void *opaque, hwaddr addr,
1728 uint64_t data, unsigned size)
1730 VFIOQuirk *quirk = opaque;
1735 quirk->data.flags |= NV_BAR5_MASTER;
1737 quirk->data.flags &= ~NV_BAR5_MASTER;
1742 quirk->data.flags |= NV_BAR5_ENABLE;
1744 quirk->data.flags &= ~NV_BAR5_ENABLE;
1748 if (quirk->data.flags & NV_BAR5_MASTER) {
1749 if ((data & ~0xfff) == 0x88000) {
1750 quirk->data.flags |= NV_BAR5_ADDRESS;
1751 quirk->data.address_val = data & 0xfff;
1752 } else if ((data & ~0xff) == 0x1800) {
1753 quirk->data.flags |= NV_BAR5_ADDRESS;
1754 quirk->data.address_val = data & 0xff;
1756 quirk->data.flags &= ~NV_BAR5_ADDRESS;
1762 vfio_generic_window_quirk_write(opaque, addr, data, size);
1765 static const MemoryRegionOps vfio_nvidia_bar5_window_quirk = {
1766 .read = vfio_generic_window_quirk_read,
1767 .write = vfio_nvidia_bar5_window_quirk_write,
1768 .valid.min_access_size = 4,
1769 .endianness = DEVICE_LITTLE_ENDIAN,
1772 static void vfio_probe_nvidia_bar5_window_quirk(VFIODevice *vdev, int nr)
1774 PCIDevice *pdev = &vdev->pdev;
1777 if (!vdev->has_vga || nr != 5 ||
1778 pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
1782 quirk = g_malloc0(sizeof(*quirk));
1784 quirk->data.read_flags = quirk->data.write_flags = NV_BAR5_VALID;
1785 quirk->data.address_offset = 0x8;
1786 quirk->data.address_size = 0; /* actually 4, but avoids generic code */
1787 quirk->data.data_offset = 0xc;
1788 quirk->data.data_size = 4;
1789 quirk->data.bar = nr;
1791 memory_region_init_io(&quirk->mem, OBJECT(vdev),
1792 &vfio_nvidia_bar5_window_quirk, quirk,
1793 "vfio-nvidia-bar5-window-quirk", 16);
1794 memory_region_add_subregion_overlap(&vdev->bars[nr].mem, 0, &quirk->mem, 1);
1796 QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
1798 DPRINTF("Enabled NVIDIA BAR5 window quirk for device %04x:%02x:%02x.%x\n",
1799 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1800 vdev->host.function);
1804 * Finally, BAR0 itself. We want to redirect any accesses to either
1805 * 0x1800 or 0x88000 through the PCI config space access functions.
1807 * NB - quirk at a page granularity or else they don't seem to work when
1810 * Here's offset 0x88000...
1812 static void vfio_probe_nvidia_bar0_88000_quirk(VFIODevice *vdev, int nr)
1814 PCIDevice *pdev = &vdev->pdev;
1817 if (!vdev->has_vga || nr != 0 ||
1818 pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
1822 quirk = g_malloc0(sizeof(*quirk));
1824 quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
1825 quirk->data.address_match = 0x88000;
1826 quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
1827 quirk->data.bar = nr;
1829 memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_generic_quirk,
1830 quirk, "vfio-nvidia-bar0-88000-quirk",
1831 TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
1832 memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
1833 quirk->data.address_match & TARGET_PAGE_MASK,
1836 QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
1838 DPRINTF("Enabled NVIDIA BAR0 0x88000 quirk for device %04x:%02x:%02x.%x\n",
1839 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1840 vdev->host.function);
1844 * And here's the same for BAR0 offset 0x1800...
1846 static void vfio_probe_nvidia_bar0_1800_quirk(VFIODevice *vdev, int nr)
1848 PCIDevice *pdev = &vdev->pdev;
1851 if (!vdev->has_vga || nr != 0 ||
1852 pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
1856 /* Log the chipset ID */
1857 DPRINTF("Nvidia NV%02x\n",
1858 (unsigned int)(vfio_bar_read(&vdev->bars[0], 0, 4) >> 20) & 0xff);
1860 quirk = g_malloc0(sizeof(*quirk));
1862 quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
1863 quirk->data.address_match = 0x1800;
1864 quirk->data.address_mask = PCI_CONFIG_SPACE_SIZE - 1;
1865 quirk->data.bar = nr;
1867 memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_generic_quirk, quirk,
1868 "vfio-nvidia-bar0-1800-quirk",
1869 TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
1870 memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
1871 quirk->data.address_match & TARGET_PAGE_MASK,
1874 QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
1876 DPRINTF("Enabled NVIDIA BAR0 0x1800 quirk for device %04x:%02x:%02x.%x\n",
1877 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1878 vdev->host.function);
1882 * TODO - Some Nvidia devices provide config access to their companion HDA
1883 * device and even to their parent bridge via these config space mirrors.
1884 * Add quirks for those regions.
1888 * Common quirk probe entry points.
1890 static void vfio_vga_quirk_setup(VFIODevice *vdev)
1892 vfio_vga_probe_ati_3c3_quirk(vdev);
1893 vfio_vga_probe_nvidia_3d0_quirk(vdev);
1896 static void vfio_vga_quirk_teardown(VFIODevice *vdev)
1900 for (i = 0; i < ARRAY_SIZE(vdev->vga.region); i++) {
1901 while (!QLIST_EMPTY(&vdev->vga.region[i].quirks)) {
1902 VFIOQuirk *quirk = QLIST_FIRST(&vdev->vga.region[i].quirks);
1903 memory_region_del_subregion(&vdev->vga.region[i].mem, &quirk->mem);
1904 QLIST_REMOVE(quirk, next);
1910 static void vfio_bar_quirk_setup(VFIODevice *vdev, int nr)
1912 vfio_probe_ati_bar4_window_quirk(vdev, nr);
1913 vfio_probe_ati_bar2_4000_quirk(vdev, nr);
1914 vfio_probe_nvidia_bar5_window_quirk(vdev, nr);
1915 vfio_probe_nvidia_bar0_88000_quirk(vdev, nr);
1916 vfio_probe_nvidia_bar0_1800_quirk(vdev, nr);
1919 static void vfio_bar_quirk_teardown(VFIODevice *vdev, int nr)
1921 VFIOBAR *bar = &vdev->bars[nr];
1923 while (!QLIST_EMPTY(&bar->quirks)) {
1924 VFIOQuirk *quirk = QLIST_FIRST(&bar->quirks);
1925 memory_region_del_subregion(&bar->mem, &quirk->mem);
1926 QLIST_REMOVE(quirk, next);
1934 static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
1936 VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
1937 uint32_t emu_bits = 0, emu_val = 0, phys_val = 0, val;
1939 memcpy(&emu_bits, vdev->emulated_config_bits + addr, len);
1940 emu_bits = le32_to_cpu(emu_bits);
1943 emu_val = pci_default_read_config(pdev, addr, len);
1946 if (~emu_bits & (0xffffffffU >> (32 - len * 8))) {
1949 ret = pread(vdev->fd, &phys_val, len, vdev->config_offset + addr);
1951 error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x) failed: %m",
1952 __func__, vdev->host.domain, vdev->host.bus,
1953 vdev->host.slot, vdev->host.function, addr, len);
1956 phys_val = le32_to_cpu(phys_val);
1959 val = (emu_val & emu_bits) | (phys_val & ~emu_bits);
1961 DPRINTF("%s(%04x:%02x:%02x.%x, @0x%x, len=0x%x) %x\n", __func__,
1962 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1963 vdev->host.function, addr, len, val);
1968 static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr,
1969 uint32_t val, int len)
1971 VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
1972 uint32_t val_le = cpu_to_le32(val);
1974 DPRINTF("%s(%04x:%02x:%02x.%x, @0x%x, 0x%x, len=0x%x)\n", __func__,
1975 vdev->host.domain, vdev->host.bus, vdev->host.slot,
1976 vdev->host.function, addr, val, len);
1978 /* Write everything to VFIO, let it filter out what we can't write */
1979 if (pwrite(vdev->fd, &val_le, len, vdev->config_offset + addr) != len) {
1980 error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x, 0x%x) failed: %m",
1981 __func__, vdev->host.domain, vdev->host.bus,
1982 vdev->host.slot, vdev->host.function, addr, val, len);
1985 /* MSI/MSI-X Enabling/Disabling */
1986 if (pdev->cap_present & QEMU_PCI_CAP_MSI &&
1987 ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size)) {
1988 int is_enabled, was_enabled = msi_enabled(pdev);
1990 pci_default_write_config(pdev, addr, val, len);
1992 is_enabled = msi_enabled(pdev);
1996 vfio_enable_msi(vdev);
2000 vfio_disable_msi(vdev);
2002 vfio_update_msi(vdev);
2005 } else if (pdev->cap_present & QEMU_PCI_CAP_MSIX &&
2006 ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) {
2007 int is_enabled, was_enabled = msix_enabled(pdev);
2009 pci_default_write_config(pdev, addr, val, len);
2011 is_enabled = msix_enabled(pdev);
2013 if (!was_enabled && is_enabled) {
2014 vfio_enable_msix(vdev);
2015 } else if (was_enabled && !is_enabled) {
2016 vfio_disable_msix(vdev);
2019 /* Write everything to QEMU to keep emulated bits correct */
2020 pci_default_write_config(pdev, addr, val, len);
2025 * DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
2027 static int vfio_dma_unmap(VFIOContainer *container,
2028 hwaddr iova, ram_addr_t size)
2030 struct vfio_iommu_type1_dma_unmap unmap = {
2031 .argsz = sizeof(unmap),
2037 if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
2038 DPRINTF("VFIO_UNMAP_DMA: %d\n", -errno);
2045 static int vfio_dma_map(VFIOContainer *container, hwaddr iova,
2046 ram_addr_t size, void *vaddr, bool readonly)
2048 struct vfio_iommu_type1_dma_map map = {
2049 .argsz = sizeof(map),
2050 .flags = VFIO_DMA_MAP_FLAG_READ,
2051 .vaddr = (__u64)(uintptr_t)vaddr,
2057 map.flags |= VFIO_DMA_MAP_FLAG_WRITE;
2061 * Try the mapping, if it fails with EBUSY, unmap the region and try
2062 * again. This shouldn't be necessary, but we sometimes see it in
2063 * the the VGA ROM space.
2065 if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 ||
2066 (errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 &&
2067 ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) {
2071 DPRINTF("VFIO_MAP_DMA: %d\n", -errno);
2075 static bool vfio_listener_skipped_section(MemoryRegionSection *section)
2077 return !memory_region_is_ram(section->mr);
2080 static void vfio_listener_region_add(MemoryListener *listener,
2081 MemoryRegionSection *section)
2083 VFIOContainer *container = container_of(listener, VFIOContainer,
2084 iommu_data.listener);
2089 assert(!memory_region_is_iommu(section->mr));
2091 if (vfio_listener_skipped_section(section)) {
2092 DPRINTF("SKIPPING region_add %"HWADDR_PRIx" - %"PRIx64"\n",
2093 section->offset_within_address_space,
2094 section->offset_within_address_space +
2095 int128_get64(int128_sub(section->size, int128_one())));
2099 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
2100 (section->offset_within_region & ~TARGET_PAGE_MASK))) {
2101 error_report("%s received unaligned region", __func__);
2105 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
2106 end = (section->offset_within_address_space + int128_get64(section->size)) &
2113 vaddr = memory_region_get_ram_ptr(section->mr) +
2114 section->offset_within_region +
2115 (iova - section->offset_within_address_space);
2117 DPRINTF("region_add %"HWADDR_PRIx" - %"HWADDR_PRIx" [%p]\n",
2118 iova, end - 1, vaddr);
2120 memory_region_ref(section->mr);
2121 ret = vfio_dma_map(container, iova, end - iova, vaddr, section->readonly);
2123 error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
2124 "0x%"HWADDR_PRIx", %p) = %d (%m)",
2125 container, iova, end - iova, vaddr, ret);
2129 static void vfio_listener_region_del(MemoryListener *listener,
2130 MemoryRegionSection *section)
2132 VFIOContainer *container = container_of(listener, VFIOContainer,
2133 iommu_data.listener);
2137 if (vfio_listener_skipped_section(section)) {
2138 DPRINTF("SKIPPING region_del %"HWADDR_PRIx" - %"PRIx64"\n",
2139 section->offset_within_address_space,
2140 section->offset_within_address_space +
2141 int128_get64(int128_sub(section->size, int128_one())));
2145 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
2146 (section->offset_within_region & ~TARGET_PAGE_MASK))) {
2147 error_report("%s received unaligned region", __func__);
2151 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
2152 end = (section->offset_within_address_space + int128_get64(section->size)) &
2159 DPRINTF("region_del %"HWADDR_PRIx" - %"HWADDR_PRIx"\n",
2162 ret = vfio_dma_unmap(container, iova, end - iova);
2163 memory_region_unref(section->mr);
2165 error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
2166 "0x%"HWADDR_PRIx") = %d (%m)",
2167 container, iova, end - iova, ret);
2171 static MemoryListener vfio_memory_listener = {
2172 .region_add = vfio_listener_region_add,
2173 .region_del = vfio_listener_region_del,
2176 static void vfio_listener_release(VFIOContainer *container)
2178 memory_listener_unregister(&container->iommu_data.listener);
2184 static void vfio_disable_interrupts(VFIODevice *vdev)
2186 switch (vdev->interrupt) {
2188 vfio_disable_intx(vdev);
2191 vfio_disable_msi(vdev);
2194 vfio_disable_msix(vdev);
2199 static int vfio_setup_msi(VFIODevice *vdev, int pos)
2202 bool msi_64bit, msi_maskbit;
2205 if (pread(vdev->fd, &ctrl, sizeof(ctrl),
2206 vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
2209 ctrl = le16_to_cpu(ctrl);
2211 msi_64bit = !!(ctrl & PCI_MSI_FLAGS_64BIT);
2212 msi_maskbit = !!(ctrl & PCI_MSI_FLAGS_MASKBIT);
2213 entries = 1 << ((ctrl & PCI_MSI_FLAGS_QMASK) >> 1);
2215 DPRINTF("%04x:%02x:%02x.%x PCI MSI CAP @0x%x\n", vdev->host.domain,
2216 vdev->host.bus, vdev->host.slot, vdev->host.function, pos);
2218 ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit);
2220 if (ret == -ENOTSUP) {
2223 error_report("vfio: msi_init failed");
2226 vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0);
2232 * We don't have any control over how pci_add_capability() inserts
2233 * capabilities into the chain. In order to setup MSI-X we need a
2234 * MemoryRegion for the BAR. In order to setup the BAR and not
2235 * attempt to mmap the MSI-X table area, which VFIO won't allow, we
2236 * need to first look for where the MSI-X table lives. So we
2237 * unfortunately split MSI-X setup across two functions.
2239 static int vfio_early_setup_msix(VFIODevice *vdev)
2243 uint32_t table, pba;
2245 pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
2250 if (pread(vdev->fd, &ctrl, sizeof(ctrl),
2251 vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
2255 if (pread(vdev->fd, &table, sizeof(table),
2256 vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
2260 if (pread(vdev->fd, &pba, sizeof(pba),
2261 vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
2265 ctrl = le16_to_cpu(ctrl);
2266 table = le32_to_cpu(table);
2267 pba = le32_to_cpu(pba);
2269 vdev->msix = g_malloc0(sizeof(*(vdev->msix)));
2270 vdev->msix->table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
2271 vdev->msix->table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
2272 vdev->msix->pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
2273 vdev->msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
2274 vdev->msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
2276 DPRINTF("%04x:%02x:%02x.%x "
2277 "PCI MSI-X CAP @0x%x, BAR %d, offset 0x%x, entries %d\n",
2278 vdev->host.domain, vdev->host.bus, vdev->host.slot,
2279 vdev->host.function, pos, vdev->msix->table_bar,
2280 vdev->msix->table_offset, vdev->msix->entries);
2285 static int vfio_setup_msix(VFIODevice *vdev, int pos)
2289 ret = msix_init(&vdev->pdev, vdev->msix->entries,
2290 &vdev->bars[vdev->msix->table_bar].mem,
2291 vdev->msix->table_bar, vdev->msix->table_offset,
2292 &vdev->bars[vdev->msix->pba_bar].mem,
2293 vdev->msix->pba_bar, vdev->msix->pba_offset, pos);
2295 if (ret == -ENOTSUP) {
2298 error_report("vfio: msix_init failed");
2305 static void vfio_teardown_msi(VFIODevice *vdev)
2307 msi_uninit(&vdev->pdev);
2310 msix_uninit(&vdev->pdev, &vdev->bars[vdev->msix->table_bar].mem,
2311 &vdev->bars[vdev->msix->pba_bar].mem);
2318 static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled)
2322 for (i = 0; i < PCI_ROM_SLOT; i++) {
2323 VFIOBAR *bar = &vdev->bars[i];
2329 memory_region_set_enabled(&bar->mmap_mem, enabled);
2330 if (vdev->msix && vdev->msix->table_bar == i) {
2331 memory_region_set_enabled(&vdev->msix->mmap_mem, enabled);
2336 static void vfio_unmap_bar(VFIODevice *vdev, int nr)
2338 VFIOBAR *bar = &vdev->bars[nr];
2344 vfio_bar_quirk_teardown(vdev, nr);
2346 memory_region_del_subregion(&bar->mem, &bar->mmap_mem);
2347 munmap(bar->mmap, memory_region_size(&bar->mmap_mem));
2349 if (vdev->msix && vdev->msix->table_bar == nr) {
2350 memory_region_del_subregion(&bar->mem, &vdev->msix->mmap_mem);
2351 munmap(vdev->msix->mmap, memory_region_size(&vdev->msix->mmap_mem));
2354 memory_region_destroy(&bar->mem);
2357 static int vfio_mmap_bar(VFIODevice *vdev, VFIOBAR *bar,
2358 MemoryRegion *mem, MemoryRegion *submem,
2359 void **map, size_t size, off_t offset,
2364 if (VFIO_ALLOW_MMAP && size && bar->flags & VFIO_REGION_INFO_FLAG_MMAP) {
2367 if (bar->flags & VFIO_REGION_INFO_FLAG_READ) {
2371 if (bar->flags & VFIO_REGION_INFO_FLAG_WRITE) {
2375 *map = mmap(NULL, size, prot, MAP_SHARED,
2376 bar->fd, bar->fd_offset + offset);
2377 if (*map == MAP_FAILED) {
2383 memory_region_init_ram_ptr(submem, OBJECT(vdev), name, size, *map);
2386 /* Create a zero sized sub-region to make cleanup easy. */
2387 memory_region_init(submem, OBJECT(vdev), name, 0);
2390 memory_region_add_subregion(mem, offset, submem);
2395 static void vfio_map_bar(VFIODevice *vdev, int nr)
2397 VFIOBAR *bar = &vdev->bars[nr];
2398 unsigned size = bar->size;
2404 /* Skip both unimplemented BARs and the upper half of 64bit BARS. */
2409 snprintf(name, sizeof(name), "VFIO %04x:%02x:%02x.%x BAR %d",
2410 vdev->host.domain, vdev->host.bus, vdev->host.slot,
2411 vdev->host.function, nr);
2413 /* Determine what type of BAR this is for registration */
2414 ret = pread(vdev->fd, &pci_bar, sizeof(pci_bar),
2415 vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
2416 if (ret != sizeof(pci_bar)) {
2417 error_report("vfio: Failed to read BAR %d (%m)", nr);
2421 pci_bar = le32_to_cpu(pci_bar);
2422 bar->ioport = (pci_bar & PCI_BASE_ADDRESS_SPACE_IO);
2423 bar->mem64 = bar->ioport ? 0 : (pci_bar & PCI_BASE_ADDRESS_MEM_TYPE_64);
2424 type = pci_bar & (bar->ioport ? ~PCI_BASE_ADDRESS_IO_MASK :
2425 ~PCI_BASE_ADDRESS_MEM_MASK);
2427 /* A "slow" read/write mapping underlies all BARs */
2428 memory_region_init_io(&bar->mem, OBJECT(vdev), &vfio_bar_ops,
2430 pci_register_bar(&vdev->pdev, nr, type, &bar->mem);
2433 * We can't mmap areas overlapping the MSIX vector table, so we
2434 * potentially insert a direct-mapped subregion before and after it.
2436 if (vdev->msix && vdev->msix->table_bar == nr) {
2437 size = vdev->msix->table_offset & TARGET_PAGE_MASK;
2440 strncat(name, " mmap", sizeof(name) - strlen(name) - 1);
2441 if (vfio_mmap_bar(vdev, bar, &bar->mem,
2442 &bar->mmap_mem, &bar->mmap, size, 0, name)) {
2443 error_report("%s unsupported. Performance may be slow", name);
2446 if (vdev->msix && vdev->msix->table_bar == nr) {
2449 start = TARGET_PAGE_ALIGN(vdev->msix->table_offset +
2450 (vdev->msix->entries * PCI_MSIX_ENTRY_SIZE));
2452 size = start < bar->size ? bar->size - start : 0;
2453 strncat(name, " msix-hi", sizeof(name) - strlen(name) - 1);
2454 /* VFIOMSIXInfo contains another MemoryRegion for this mapping */
2455 if (vfio_mmap_bar(vdev, bar, &bar->mem, &vdev->msix->mmap_mem,
2456 &vdev->msix->mmap, size, start, name)) {
2457 error_report("%s unsupported. Performance may be slow", name);
2461 vfio_bar_quirk_setup(vdev, nr);
2464 static void vfio_map_bars(VFIODevice *vdev)
2468 for (i = 0; i < PCI_ROM_SLOT; i++) {
2469 vfio_map_bar(vdev, i);
2472 if (vdev->has_vga) {
2473 memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_MEM].mem,
2474 OBJECT(vdev), &vfio_vga_ops,
2475 &vdev->vga.region[QEMU_PCI_VGA_MEM],
2476 "vfio-vga-mmio@0xa0000",
2477 QEMU_PCI_VGA_MEM_SIZE);
2478 memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem,
2479 OBJECT(vdev), &vfio_vga_ops,
2480 &vdev->vga.region[QEMU_PCI_VGA_IO_LO],
2481 "vfio-vga-io@0x3b0",
2482 QEMU_PCI_VGA_IO_LO_SIZE);
2483 memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
2484 OBJECT(vdev), &vfio_vga_ops,
2485 &vdev->vga.region[QEMU_PCI_VGA_IO_HI],
2486 "vfio-vga-io@0x3c0",
2487 QEMU_PCI_VGA_IO_HI_SIZE);
2489 pci_register_vga(&vdev->pdev, &vdev->vga.region[QEMU_PCI_VGA_MEM].mem,
2490 &vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem,
2491 &vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem);
2492 vfio_vga_quirk_setup(vdev);
2496 static void vfio_unmap_bars(VFIODevice *vdev)
2500 for (i = 0; i < PCI_ROM_SLOT; i++) {
2501 vfio_unmap_bar(vdev, i);
2504 if (vdev->has_vga) {
2505 vfio_vga_quirk_teardown(vdev);
2506 pci_unregister_vga(&vdev->pdev);
2507 memory_region_destroy(&vdev->vga.region[QEMU_PCI_VGA_MEM].mem);
2508 memory_region_destroy(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem);
2509 memory_region_destroy(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem);
2516 static uint8_t vfio_std_cap_max_size(PCIDevice *pdev, uint8_t pos)
2518 uint8_t tmp, next = 0xff;
2520 for (tmp = pdev->config[PCI_CAPABILITY_LIST]; tmp;
2521 tmp = pdev->config[tmp + 1]) {
2522 if (tmp > pos && tmp < next) {
2530 static void vfio_set_word_bits(uint8_t *buf, uint16_t val, uint16_t mask)
2532 pci_set_word(buf, (pci_get_word(buf) & ~mask) | val);
2535 static void vfio_add_emulated_word(VFIODevice *vdev, int pos,
2536 uint16_t val, uint16_t mask)
2538 vfio_set_word_bits(vdev->pdev.config + pos, val, mask);
2539 vfio_set_word_bits(vdev->pdev.wmask + pos, ~mask, mask);
2540 vfio_set_word_bits(vdev->emulated_config_bits + pos, mask, mask);
2543 static void vfio_set_long_bits(uint8_t *buf, uint32_t val, uint32_t mask)
2545 pci_set_long(buf, (pci_get_long(buf) & ~mask) | val);
2548 static void vfio_add_emulated_long(VFIODevice *vdev, int pos,
2549 uint32_t val, uint32_t mask)
2551 vfio_set_long_bits(vdev->pdev.config + pos, val, mask);
2552 vfio_set_long_bits(vdev->pdev.wmask + pos, ~mask, mask);
2553 vfio_set_long_bits(vdev->emulated_config_bits + pos, mask, mask);
2556 static int vfio_setup_pcie_cap(VFIODevice *vdev, int pos, uint8_t size)
2561 flags = pci_get_word(vdev->pdev.config + pos + PCI_CAP_FLAGS);
2562 type = (flags & PCI_EXP_FLAGS_TYPE) >> 4;
2564 if (type != PCI_EXP_TYPE_ENDPOINT &&
2565 type != PCI_EXP_TYPE_LEG_END &&
2566 type != PCI_EXP_TYPE_RC_END) {
2568 error_report("vfio: Assignment of PCIe type 0x%x "
2569 "devices is not currently supported", type);
2573 if (!pci_bus_is_express(vdev->pdev.bus)) {
2575 * Use express capability as-is on PCI bus. It doesn't make much
2576 * sense to even expose, but some drivers (ex. tg3) depend on it
2577 * and guests don't seem to be particular about it. We'll need
2578 * to revist this or force express devices to express buses if we
2579 * ever expose an IOMMU to the guest.
2581 } else if (pci_bus_is_root(vdev->pdev.bus)) {
2583 * On a Root Complex bus Endpoints become Root Complex Integrated
2584 * Endpoints, which changes the type and clears the LNK & LNK2 fields.
2586 if (type == PCI_EXP_TYPE_ENDPOINT) {
2587 vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
2588 PCI_EXP_TYPE_RC_END << 4,
2589 PCI_EXP_FLAGS_TYPE);
2591 /* Link Capabilities, Status, and Control goes away */
2592 if (size > PCI_EXP_LNKCTL) {
2593 vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP, 0, ~0);
2594 vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
2595 vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA, 0, ~0);
2597 #ifndef PCI_EXP_LNKCAP2
2598 #define PCI_EXP_LNKCAP2 44
2600 #ifndef PCI_EXP_LNKSTA2
2601 #define PCI_EXP_LNKSTA2 50
2603 /* Link 2 Capabilities, Status, and Control goes away */
2604 if (size > PCI_EXP_LNKCAP2) {
2605 vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP2, 0, ~0);
2606 vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL2, 0, ~0);
2607 vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA2, 0, ~0);
2611 } else if (type == PCI_EXP_TYPE_LEG_END) {
2613 * Legacy endpoints don't belong on the root complex. Windows
2614 * seems to be happier with devices if we skip the capability.
2621 * Convert Root Complex Integrated Endpoints to regular endpoints.
2622 * These devices don't support LNK/LNK2 capabilities, so make them up.
2624 if (type == PCI_EXP_TYPE_RC_END) {
2625 vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
2626 PCI_EXP_TYPE_ENDPOINT << 4,
2627 PCI_EXP_FLAGS_TYPE);
2628 vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP,
2629 PCI_EXP_LNK_MLW_1 | PCI_EXP_LNK_LS_25, ~0);
2630 vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
2633 /* Mark the Link Status bits as emulated to allow virtual negotiation */
2634 vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA,
2635 pci_get_word(vdev->pdev.config + pos +
2637 PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);
2640 pos = pci_add_capability(&vdev->pdev, PCI_CAP_ID_EXP, pos, size);
2642 vdev->pdev.exp.exp_cap = pos;
2648 static void vfio_check_pcie_flr(VFIODevice *vdev, uint8_t pos)
2650 uint32_t cap = pci_get_long(vdev->pdev.config + pos + PCI_EXP_DEVCAP);
2652 if (cap & PCI_EXP_DEVCAP_FLR) {
2653 DPRINTF("%04x:%02x:%02x.%x Supports FLR via PCIe cap\n",
2654 vdev->host.domain, vdev->host.bus, vdev->host.slot,
2655 vdev->host.function);
2656 vdev->has_flr = true;
2660 static void vfio_check_pm_reset(VFIODevice *vdev, uint8_t pos)
2662 uint16_t csr = pci_get_word(vdev->pdev.config + pos + PCI_PM_CTRL);
2664 if (!(csr & PCI_PM_CTRL_NO_SOFT_RESET)) {
2665 DPRINTF("%04x:%02x:%02x.%x Supports PM reset\n",
2666 vdev->host.domain, vdev->host.bus, vdev->host.slot,
2667 vdev->host.function);
2668 vdev->has_pm_reset = true;
2672 static void vfio_check_af_flr(VFIODevice *vdev, uint8_t pos)
2674 uint8_t cap = pci_get_byte(vdev->pdev.config + pos + PCI_AF_CAP);
2676 if ((cap & PCI_AF_CAP_TP) && (cap & PCI_AF_CAP_FLR)) {
2677 DPRINTF("%04x:%02x:%02x.%x Supports FLR via AF cap\n",
2678 vdev->host.domain, vdev->host.bus, vdev->host.slot,
2679 vdev->host.function);
2680 vdev->has_flr = true;
2684 static int vfio_add_std_cap(VFIODevice *vdev, uint8_t pos)
2686 PCIDevice *pdev = &vdev->pdev;
2687 uint8_t cap_id, next, size;
2690 cap_id = pdev->config[pos];
2691 next = pdev->config[pos + 1];
2694 * If it becomes important to configure capabilities to their actual
2695 * size, use this as the default when it's something we don't recognize.
2696 * Since QEMU doesn't actually handle many of the config accesses,
2697 * exact size doesn't seem worthwhile.
2699 size = vfio_std_cap_max_size(pdev, pos);
2702 * pci_add_capability always inserts the new capability at the head
2703 * of the chain. Therefore to end up with a chain that matches the
2704 * physical device, we insert from the end by making this recursive.
2705 * This is also why we pre-caclulate size above as cached config space
2706 * will be changed as we unwind the stack.
2709 ret = vfio_add_std_cap(vdev, next);
2714 /* Begin the rebuild, use QEMU emulated list bits */
2715 pdev->config[PCI_CAPABILITY_LIST] = 0;
2716 vdev->emulated_config_bits[PCI_CAPABILITY_LIST] = 0xff;
2717 vdev->emulated_config_bits[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
2720 /* Use emulated next pointer to allow dropping caps */
2721 pci_set_byte(vdev->emulated_config_bits + pos + 1, 0xff);
2724 case PCI_CAP_ID_MSI:
2725 ret = vfio_setup_msi(vdev, pos);
2727 case PCI_CAP_ID_EXP:
2728 vfio_check_pcie_flr(vdev, pos);
2729 ret = vfio_setup_pcie_cap(vdev, pos, size);
2731 case PCI_CAP_ID_MSIX:
2732 ret = vfio_setup_msix(vdev, pos);
2735 vfio_check_pm_reset(vdev, pos);
2737 ret = pci_add_capability(pdev, cap_id, pos, size);
2740 vfio_check_af_flr(vdev, pos);
2741 ret = pci_add_capability(pdev, cap_id, pos, size);
2744 ret = pci_add_capability(pdev, cap_id, pos, size);
2749 error_report("vfio: %04x:%02x:%02x.%x Error adding PCI capability "
2750 "0x%x[0x%x]@0x%x: %d", vdev->host.domain,
2751 vdev->host.bus, vdev->host.slot, vdev->host.function,
2752 cap_id, size, pos, ret);
2759 static int vfio_add_capabilities(VFIODevice *vdev)
2761 PCIDevice *pdev = &vdev->pdev;
2763 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST) ||
2764 !pdev->config[PCI_CAPABILITY_LIST]) {
2765 return 0; /* Nothing to add */
2768 return vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
2771 static void vfio_pci_pre_reset(VFIODevice *vdev)
2773 PCIDevice *pdev = &vdev->pdev;
2776 vfio_disable_interrupts(vdev);
2778 /* Make sure the device is in D0 */
2783 pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
2784 state = pmcsr & PCI_PM_CTRL_STATE_MASK;
2786 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
2787 vfio_pci_write_config(pdev, vdev->pm_cap + PCI_PM_CTRL, pmcsr, 2);
2788 /* vfio handles the necessary delay here */
2789 pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
2790 state = pmcsr & PCI_PM_CTRL_STATE_MASK;
2792 error_report("vfio: Unable to power on device, stuck in D%d\n",
2799 * Stop any ongoing DMA by disconecting I/O, MMIO, and bus master.
2800 * Also put INTx Disable in known state.
2802 cmd = vfio_pci_read_config(pdev, PCI_COMMAND, 2);
2803 cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
2804 PCI_COMMAND_INTX_DISABLE);
2805 vfio_pci_write_config(pdev, PCI_COMMAND, cmd, 2);
2808 static void vfio_pci_post_reset(VFIODevice *vdev)
2810 vfio_enable_intx(vdev);
2813 static bool vfio_pci_host_match(PCIHostDeviceAddress *host1,
2814 PCIHostDeviceAddress *host2)
2816 return (host1->domain == host2->domain && host1->bus == host2->bus &&
2817 host1->slot == host2->slot && host1->function == host2->function);
2820 static int vfio_pci_hot_reset(VFIODevice *vdev, bool single)
2823 struct vfio_pci_hot_reset_info *info;
2824 struct vfio_pci_dependent_device *devices;
2825 struct vfio_pci_hot_reset *reset;
2830 DPRINTF("%s(%04x:%02x:%02x.%x) %s\n", __func__, vdev->host.domain,
2831 vdev->host.bus, vdev->host.slot, vdev->host.function,
2832 single ? "one" : "multi");
2834 vfio_pci_pre_reset(vdev);
2835 vdev->needs_reset = false;
2837 info = g_malloc0(sizeof(*info));
2838 info->argsz = sizeof(*info);
2840 ret = ioctl(vdev->fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
2841 if (ret && errno != ENOSPC) {
2843 if (!vdev->has_pm_reset) {
2844 error_report("vfio: Cannot reset device %04x:%02x:%02x.%x, "
2845 "no available reset mechanism.", vdev->host.domain,
2846 vdev->host.bus, vdev->host.slot, vdev->host.function);
2851 count = info->count;
2852 info = g_realloc(info, sizeof(*info) + (count * sizeof(*devices)));
2853 info->argsz = sizeof(*info) + (count * sizeof(*devices));
2854 devices = &info->devices[0];
2856 ret = ioctl(vdev->fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
2859 error_report("vfio: hot reset info failed: %m");
2863 DPRINTF("%04x:%02x:%02x.%x: hot reset dependent devices:\n",
2864 vdev->host.domain, vdev->host.bus, vdev->host.slot,
2865 vdev->host.function);
2867 /* Verify that we have all the groups required */
2868 for (i = 0; i < info->count; i++) {
2869 PCIHostDeviceAddress host;
2872 host.domain = devices[i].segment;
2873 host.bus = devices[i].bus;
2874 host.slot = PCI_SLOT(devices[i].devfn);
2875 host.function = PCI_FUNC(devices[i].devfn);
2877 DPRINTF("\t%04x:%02x:%02x.%x group %d\n", host.domain,
2878 host.bus, host.slot, host.function, devices[i].group_id);
2880 if (vfio_pci_host_match(&host, &vdev->host)) {
2884 QLIST_FOREACH(group, &group_list, next) {
2885 if (group->groupid == devices[i].group_id) {
2891 if (!vdev->has_pm_reset) {
2892 error_report("vfio: Cannot reset device %04x:%02x:%02x.%x, "
2893 "depends on group %d which is not owned.",
2894 vdev->host.domain, vdev->host.bus, vdev->host.slot,
2895 vdev->host.function, devices[i].group_id);
2901 /* Prep dependent devices for reset and clear our marker. */
2902 QLIST_FOREACH(tmp, &group->device_list, next) {
2903 if (vfio_pci_host_match(&host, &tmp->host)) {
2905 DPRINTF("vfio: found another in-use device "
2906 "%04x:%02x:%02x.%x\n", host.domain, host.bus,
2907 host.slot, host.function);
2911 vfio_pci_pre_reset(tmp);
2912 tmp->needs_reset = false;
2919 if (!single && !multi) {
2920 DPRINTF("vfio: No other in-use devices for multi hot reset\n");
2925 /* Determine how many group fds need to be passed */
2927 QLIST_FOREACH(group, &group_list, next) {
2928 for (i = 0; i < info->count; i++) {
2929 if (group->groupid == devices[i].group_id) {
2936 reset = g_malloc0(sizeof(*reset) + (count * sizeof(*fds)));
2937 reset->argsz = sizeof(*reset) + (count * sizeof(*fds));
2938 fds = &reset->group_fds[0];
2940 /* Fill in group fds */
2941 QLIST_FOREACH(group, &group_list, next) {
2942 for (i = 0; i < info->count; i++) {
2943 if (group->groupid == devices[i].group_id) {
2944 fds[reset->count++] = group->fd;
2951 ret = ioctl(vdev->fd, VFIO_DEVICE_PCI_HOT_RESET, reset);
2954 DPRINTF("%04x:%02x:%02x.%x hot reset: %s\n", vdev->host.domain,
2955 vdev->host.bus, vdev->host.slot, vdev->host.function,
2956 ret ? "%m" : "Success");
2959 /* Re-enable INTx on affected devices */
2960 for (i = 0; i < info->count; i++) {
2961 PCIHostDeviceAddress host;
2964 host.domain = devices[i].segment;
2965 host.bus = devices[i].bus;
2966 host.slot = PCI_SLOT(devices[i].devfn);
2967 host.function = PCI_FUNC(devices[i].devfn);
2969 if (vfio_pci_host_match(&host, &vdev->host)) {
2973 QLIST_FOREACH(group, &group_list, next) {
2974 if (group->groupid == devices[i].group_id) {
2983 QLIST_FOREACH(tmp, &group->device_list, next) {
2984 if (vfio_pci_host_match(&host, &tmp->host)) {
2985 vfio_pci_post_reset(tmp);
2991 vfio_pci_post_reset(vdev);
2998 * We want to differentiate hot reset of mulitple in-use devices vs hot reset
2999 * of a single in-use device. VFIO_DEVICE_RESET will already handle the case
3000 * of doing hot resets when there is only a single device per bus. The in-use
3001 * here refers to how many VFIODevices are affected. A hot reset that affects
3002 * multiple devices, but only a single in-use device, means that we can call
3003 * it from our bus ->reset() callback since the extent is effectively a single
3004 * device. This allows us to make use of it in the hotplug path. When there
3005 * are multiple in-use devices, we can only trigger the hot reset during a
3006 * system reset and thus from our reset handler. We separate _one vs _multi
3007 * here so that we don't overlap and do a double reset on the system reset
3008 * path where both our reset handler and ->reset() callback are used. Calling
3009 * _one() will only do a hot reset for the one in-use devices case, calling
3010 * _multi() will do nothing if a _one() would have been sufficient.
3012 static int vfio_pci_hot_reset_one(VFIODevice *vdev)
3014 return vfio_pci_hot_reset(vdev, true);
3017 static int vfio_pci_hot_reset_multi(VFIODevice *vdev)
3019 return vfio_pci_hot_reset(vdev, false);
3022 static void vfio_pci_reset_handler(void *opaque)
3027 QLIST_FOREACH(group, &group_list, next) {
3028 QLIST_FOREACH(vdev, &group->device_list, next) {
3029 if (!vdev->reset_works || (!vdev->has_flr && vdev->has_pm_reset)) {
3030 vdev->needs_reset = true;
3035 QLIST_FOREACH(group, &group_list, next) {
3036 QLIST_FOREACH(vdev, &group->device_list, next) {
3037 if (vdev->needs_reset) {
3038 vfio_pci_hot_reset_multi(vdev);
3044 static int vfio_connect_container(VFIOGroup *group)
3046 VFIOContainer *container;
3049 if (group->container) {
3053 QLIST_FOREACH(container, &container_list, next) {
3054 if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) {
3055 group->container = container;
3056 QLIST_INSERT_HEAD(&container->group_list, group, container_next);
3061 fd = qemu_open("/dev/vfio/vfio", O_RDWR);
3063 error_report("vfio: failed to open /dev/vfio/vfio: %m");
3067 ret = ioctl(fd, VFIO_GET_API_VERSION);
3068 if (ret != VFIO_API_VERSION) {
3069 error_report("vfio: supported vfio version: %d, "
3070 "reported version: %d", VFIO_API_VERSION, ret);
3075 container = g_malloc0(sizeof(*container));
3078 if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU)) {
3079 ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
3081 error_report("vfio: failed to set group container: %m");
3087 ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU);
3089 error_report("vfio: failed to set iommu for container: %m");
3095 container->iommu_data.listener = vfio_memory_listener;
3096 container->iommu_data.release = vfio_listener_release;
3098 memory_listener_register(&container->iommu_data.listener, &address_space_memory);
3100 error_report("vfio: No available IOMMU models");
3106 QLIST_INIT(&container->group_list);
3107 QLIST_INSERT_HEAD(&container_list, container, next);
3109 group->container = container;
3110 QLIST_INSERT_HEAD(&container->group_list, group, container_next);
3115 static void vfio_disconnect_container(VFIOGroup *group)
3117 VFIOContainer *container = group->container;
3119 if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) {
3120 error_report("vfio: error disconnecting group %d from container",
3124 QLIST_REMOVE(group, container_next);
3125 group->container = NULL;
3127 if (QLIST_EMPTY(&container->group_list)) {
3128 if (container->iommu_data.release) {
3129 container->iommu_data.release(container);
3131 QLIST_REMOVE(container, next);
3132 DPRINTF("vfio_disconnect_container: close container->fd\n");
3133 close(container->fd);
3138 static VFIOGroup *vfio_get_group(int groupid)
3142 struct vfio_group_status status = { .argsz = sizeof(status) };
3144 QLIST_FOREACH(group, &group_list, next) {
3145 if (group->groupid == groupid) {
3150 group = g_malloc0(sizeof(*group));
3152 snprintf(path, sizeof(path), "/dev/vfio/%d", groupid);
3153 group->fd = qemu_open(path, O_RDWR);
3154 if (group->fd < 0) {
3155 error_report("vfio: error opening %s: %m", path);
3160 if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
3161 error_report("vfio: error getting group status: %m");
3167 if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
3168 error_report("vfio: error, group %d is not viable, please ensure "
3169 "all devices within the iommu_group are bound to their "
3170 "vfio bus driver.", groupid);
3176 group->groupid = groupid;
3177 QLIST_INIT(&group->device_list);
3179 if (vfio_connect_container(group)) {
3180 error_report("vfio: failed to setup container for group %d", groupid);
3186 if (QLIST_EMPTY(&group_list)) {
3187 qemu_register_reset(vfio_pci_reset_handler, NULL);
3190 QLIST_INSERT_HEAD(&group_list, group, next);
3195 static void vfio_put_group(VFIOGroup *group)
3197 if (!QLIST_EMPTY(&group->device_list)) {
3201 vfio_disconnect_container(group);
3202 QLIST_REMOVE(group, next);
3203 DPRINTF("vfio_put_group: close group->fd\n");
3207 if (QLIST_EMPTY(&group_list)) {
3208 qemu_unregister_reset(vfio_pci_reset_handler, NULL);
3212 static int vfio_get_device(VFIOGroup *group, const char *name, VFIODevice *vdev)
3214 struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) };
3215 struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) };
3216 struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) };
3219 ret = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name);
3221 error_report("vfio: error getting device %s from group %d: %m",
3222 name, group->groupid);
3223 error_printf("Verify all devices in group %d are bound to vfio-pci "
3224 "or pci-stub and not already in use\n", group->groupid);
3229 vdev->group = group;
3230 QLIST_INSERT_HEAD(&group->device_list, vdev, next);
3232 /* Sanity check device */
3233 ret = ioctl(vdev->fd, VFIO_DEVICE_GET_INFO, &dev_info);
3235 error_report("vfio: error getting device info: %m");
3239 DPRINTF("Device %s flags: %u, regions: %u, irgs: %u\n", name,
3240 dev_info.flags, dev_info.num_regions, dev_info.num_irqs);
3242 if (!(dev_info.flags & VFIO_DEVICE_FLAGS_PCI)) {
3243 error_report("vfio: Um, this isn't a PCI device");
3247 vdev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET);
3249 if (dev_info.num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) {
3250 error_report("vfio: unexpected number of io regions %u",
3251 dev_info.num_regions);
3255 if (dev_info.num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) {
3256 error_report("vfio: unexpected number of irqs %u", dev_info.num_irqs);
3260 for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
3263 ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
3265 error_report("vfio: Error getting region %d info: %m", i);
3269 DPRINTF("Device %s region %d:\n", name, i);
3270 DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
3271 (unsigned long)reg_info.size, (unsigned long)reg_info.offset,
3272 (unsigned long)reg_info.flags);
3274 vdev->bars[i].flags = reg_info.flags;
3275 vdev->bars[i].size = reg_info.size;
3276 vdev->bars[i].fd_offset = reg_info.offset;
3277 vdev->bars[i].fd = vdev->fd;
3278 vdev->bars[i].nr = i;
3279 QLIST_INIT(&vdev->bars[i].quirks);
3282 reg_info.index = VFIO_PCI_CONFIG_REGION_INDEX;
3284 ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
3286 error_report("vfio: Error getting config info: %m");
3290 DPRINTF("Device %s config:\n", name);
3291 DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n",
3292 (unsigned long)reg_info.size, (unsigned long)reg_info.offset,
3293 (unsigned long)reg_info.flags);
3295 vdev->config_size = reg_info.size;
3296 if (vdev->config_size == PCI_CONFIG_SPACE_SIZE) {
3297 vdev->pdev.cap_present &= ~QEMU_PCI_CAP_EXPRESS;
3299 vdev->config_offset = reg_info.offset;
3301 if ((vdev->features & VFIO_FEATURE_ENABLE_VGA) &&
3302 dev_info.num_regions > VFIO_PCI_VGA_REGION_INDEX) {
3303 struct vfio_region_info vga_info = {
3304 .argsz = sizeof(vga_info),
3305 .index = VFIO_PCI_VGA_REGION_INDEX,
3308 ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, &vga_info);
3311 "vfio: Device does not support requested feature x-vga");
3315 if (!(vga_info.flags & VFIO_REGION_INFO_FLAG_READ) ||
3316 !(vga_info.flags & VFIO_REGION_INFO_FLAG_WRITE) ||
3317 vga_info.size < 0xbffff + 1) {
3318 error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx",
3319 (unsigned long)vga_info.flags,
3320 (unsigned long)vga_info.size);
3324 vdev->vga.fd_offset = vga_info.offset;
3325 vdev->vga.fd = vdev->fd;
3327 vdev->vga.region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE;
3328 vdev->vga.region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM;
3329 QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_MEM].quirks);
3331 vdev->vga.region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE;
3332 vdev->vga.region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO;
3333 QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].quirks);
3335 vdev->vga.region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE;
3336 vdev->vga.region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI;
3337 QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks);
3339 vdev->has_vga = true;
3341 irq_info.index = VFIO_PCI_ERR_IRQ_INDEX;
3343 ret = ioctl(vdev->fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info);
3345 /* This can fail for an old kernel or legacy PCI dev */
3346 DPRINTF("VFIO_DEVICE_GET_IRQ_INFO failure: %m\n");
3348 } else if (irq_info.count == 1) {
3349 vdev->pci_aer = true;
3351 error_report("vfio: %04x:%02x:%02x.%x "
3352 "Could not enable error recovery for the device",
3353 vdev->host.domain, vdev->host.bus, vdev->host.slot,
3354 vdev->host.function);
3359 QLIST_REMOVE(vdev, next);
3366 static void vfio_put_device(VFIODevice *vdev)
3368 QLIST_REMOVE(vdev, next);
3370 DPRINTF("vfio_put_device: close vdev->fd\n");
3378 static void vfio_err_notifier_handler(void *opaque)
3380 VFIODevice *vdev = opaque;
3382 if (!event_notifier_test_and_clear(&vdev->err_notifier)) {
3387 * TBD. Retrieve the error details and decide what action
3388 * needs to be taken. One of the actions could be to pass
3389 * the error to the guest and have the guest driver recover
3390 * from the error. This requires that PCIe capabilities be
3391 * exposed to the guest. For now, we just terminate the
3392 * guest to contain the error.
3395 error_report("%s(%04x:%02x:%02x.%x) Unrecoverable error detected. "
3396 "Please collect any data possible and then kill the guest",
3397 __func__, vdev->host.domain, vdev->host.bus,
3398 vdev->host.slot, vdev->host.function);
3400 vm_stop(RUN_STATE_IO_ERROR);
3404 * Registers error notifier for devices supporting error recovery.
3405 * If we encounter a failure in this function, we report an error
3406 * and continue after disabling error recovery support for the
3409 static void vfio_register_err_notifier(VFIODevice *vdev)
3413 struct vfio_irq_set *irq_set;
3416 if (!vdev->pci_aer) {
3420 if (event_notifier_init(&vdev->err_notifier, 0)) {
3421 error_report("vfio: Unable to init event notifier for error detection");
3422 vdev->pci_aer = false;
3426 argsz = sizeof(*irq_set) + sizeof(*pfd);
3428 irq_set = g_malloc0(argsz);
3429 irq_set->argsz = argsz;
3430 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
3431 VFIO_IRQ_SET_ACTION_TRIGGER;
3432 irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
3435 pfd = (int32_t *)&irq_set->data;
3437 *pfd = event_notifier_get_fd(&vdev->err_notifier);
3438 qemu_set_fd_handler(*pfd, vfio_err_notifier_handler, NULL, vdev);
3440 ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
3442 error_report("vfio: Failed to set up error notification");
3443 qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
3444 event_notifier_cleanup(&vdev->err_notifier);
3445 vdev->pci_aer = false;
3450 static void vfio_unregister_err_notifier(VFIODevice *vdev)
3453 struct vfio_irq_set *irq_set;
3457 if (!vdev->pci_aer) {
3461 argsz = sizeof(*irq_set) + sizeof(*pfd);
3463 irq_set = g_malloc0(argsz);
3464 irq_set->argsz = argsz;
3465 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
3466 VFIO_IRQ_SET_ACTION_TRIGGER;
3467 irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
3470 pfd = (int32_t *)&irq_set->data;
3473 ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
3475 error_report("vfio: Failed to de-assign error fd: %m");
3478 qemu_set_fd_handler(event_notifier_get_fd(&vdev->err_notifier),
3480 event_notifier_cleanup(&vdev->err_notifier);
3483 static int vfio_initfn(PCIDevice *pdev)
3485 VFIODevice *pvdev, *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
3487 char path[PATH_MAX], iommu_group_path[PATH_MAX], *group_name;
3493 /* Check that the host device exists */
3494 snprintf(path, sizeof(path),
3495 "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
3496 vdev->host.domain, vdev->host.bus, vdev->host.slot,
3497 vdev->host.function);
3498 if (stat(path, &st) < 0) {
3499 error_report("vfio: error: no such host device: %s", path);
3503 strncat(path, "iommu_group", sizeof(path) - strlen(path) - 1);
3505 len = readlink(path, iommu_group_path, PATH_MAX);
3507 error_report("vfio: error no iommu_group for device");
3511 iommu_group_path[len] = 0;
3512 group_name = basename(iommu_group_path);
3514 if (sscanf(group_name, "%d", &groupid) != 1) {
3515 error_report("vfio: error reading %s: %m", path);
3519 DPRINTF("%s(%04x:%02x:%02x.%x) group %d\n", __func__, vdev->host.domain,
3520 vdev->host.bus, vdev->host.slot, vdev->host.function, groupid);
3522 group = vfio_get_group(groupid);
3524 error_report("vfio: failed to get group %d", groupid);
3528 snprintf(path, sizeof(path), "%04x:%02x:%02x.%01x",
3529 vdev->host.domain, vdev->host.bus, vdev->host.slot,
3530 vdev->host.function);
3532 QLIST_FOREACH(pvdev, &group->device_list, next) {
3533 if (pvdev->host.domain == vdev->host.domain &&
3534 pvdev->host.bus == vdev->host.bus &&
3535 pvdev->host.slot == vdev->host.slot &&
3536 pvdev->host.function == vdev->host.function) {
3538 error_report("vfio: error: device %s is already attached", path);
3539 vfio_put_group(group);
3544 ret = vfio_get_device(group, path, vdev);
3546 error_report("vfio: failed to get device %s", path);
3547 vfio_put_group(group);
3551 /* Get a copy of config space */
3552 ret = pread(vdev->fd, vdev->pdev.config,
3553 MIN(pci_config_size(&vdev->pdev), vdev->config_size),
3554 vdev->config_offset);
3555 if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
3556 ret = ret < 0 ? -errno : -EFAULT;
3557 error_report("vfio: Failed to read device config space");
3561 /* vfio emulates a lot for us, but some bits need extra love */
3562 vdev->emulated_config_bits = g_malloc0(vdev->config_size);
3564 /* QEMU can choose to expose the ROM or not */
3565 memset(vdev->emulated_config_bits + PCI_ROM_ADDRESS, 0xff, 4);
3567 /* QEMU can change multi-function devices to single function, or reverse */
3568 vdev->emulated_config_bits[PCI_HEADER_TYPE] =
3569 PCI_HEADER_TYPE_MULTI_FUNCTION;
3572 * Clear host resource mapping info. If we choose not to register a
3573 * BAR, such as might be the case with the option ROM, we can get
3574 * confusing, unwritable, residual addresses from the host here.
3576 memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
3577 memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);
3579 vfio_pci_size_rom(vdev);
3581 ret = vfio_early_setup_msix(vdev);
3586 vfio_map_bars(vdev);
3588 ret = vfio_add_capabilities(vdev);
3593 /* QEMU emulates all of MSI & MSIX */
3594 if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
3595 memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
3599 if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
3600 memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
3601 vdev->msi_cap_size);
3604 if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
3605 vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
3606 vfio_intx_mmap_enable, vdev);
3607 pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_update_irq);
3608 ret = vfio_enable_intx(vdev);
3614 add_boot_device_path(vdev->bootindex, &pdev->qdev, NULL);
3615 vfio_register_err_notifier(vdev);
3620 pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
3621 vfio_teardown_msi(vdev);
3622 vfio_unmap_bars(vdev);
3624 g_free(vdev->emulated_config_bits);
3625 vfio_put_device(vdev);
3626 vfio_put_group(group);
3630 static void vfio_exitfn(PCIDevice *pdev)
3632 VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
3633 VFIOGroup *group = vdev->group;
3635 vfio_unregister_err_notifier(vdev);
3636 pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
3637 vfio_disable_interrupts(vdev);
3638 if (vdev->intx.mmap_timer) {
3639 timer_free(vdev->intx.mmap_timer);
3641 vfio_teardown_msi(vdev);
3642 vfio_unmap_bars(vdev);
3643 g_free(vdev->emulated_config_bits);
3645 vfio_put_device(vdev);
3646 vfio_put_group(group);
3649 static void vfio_pci_reset(DeviceState *dev)
3651 PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, dev);
3652 VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
3654 DPRINTF("%s(%04x:%02x:%02x.%x)\n", __func__, vdev->host.domain,
3655 vdev->host.bus, vdev->host.slot, vdev->host.function);
3657 vfio_pci_pre_reset(vdev);
3659 if (vdev->reset_works && (vdev->has_flr || !vdev->has_pm_reset) &&
3660 !ioctl(vdev->fd, VFIO_DEVICE_RESET)) {
3661 DPRINTF("%04x:%02x:%02x.%x FLR/VFIO_DEVICE_RESET\n", vdev->host.domain,
3662 vdev->host.bus, vdev->host.slot, vdev->host.function);
3666 /* See if we can do our own bus reset */
3667 if (!vfio_pci_hot_reset_one(vdev)) {
3671 /* If nothing else works and the device supports PM reset, use it */
3672 if (vdev->reset_works && vdev->has_pm_reset &&
3673 !ioctl(vdev->fd, VFIO_DEVICE_RESET)) {
3674 DPRINTF("%04x:%02x:%02x.%x PCI PM Reset\n", vdev->host.domain,
3675 vdev->host.bus, vdev->host.slot, vdev->host.function);
3680 vfio_pci_post_reset(vdev);
3683 static Property vfio_pci_dev_properties[] = {
3684 DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIODevice, host),
3685 DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIODevice,
3686 intx.mmap_timeout, 1100),
3687 DEFINE_PROP_BIT("x-vga", VFIODevice, features,
3688 VFIO_FEATURE_ENABLE_VGA_BIT, false),
3689 DEFINE_PROP_INT32("bootindex", VFIODevice, bootindex, -1),
3691 * TODO - support passed fds... is this necessary?
3692 * DEFINE_PROP_STRING("vfiofd", VFIODevice, vfiofd_name),
3693 * DEFINE_PROP_STRING("vfiogroupfd, VFIODevice, vfiogroupfd_name),
3695 DEFINE_PROP_END_OF_LIST(),
3698 static const VMStateDescription vfio_pci_vmstate = {
3703 static void vfio_pci_dev_class_init(ObjectClass *klass, void *data)
3705 DeviceClass *dc = DEVICE_CLASS(klass);
3706 PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
3708 dc->reset = vfio_pci_reset;
3709 dc->props = vfio_pci_dev_properties;
3710 dc->vmsd = &vfio_pci_vmstate;
3711 dc->desc = "VFIO-based PCI device assignment";
3712 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
3713 pdc->init = vfio_initfn;
3714 pdc->exit = vfio_exitfn;
3715 pdc->config_read = vfio_pci_read_config;
3716 pdc->config_write = vfio_pci_write_config;
3717 pdc->is_express = 1; /* We might be */
3720 static const TypeInfo vfio_pci_dev_info = {
3722 .parent = TYPE_PCI_DEVICE,
3723 .instance_size = sizeof(VFIODevice),
3724 .class_init = vfio_pci_dev_class_init,
3727 static void register_vfio_pci_dev_type(void)
3729 type_register_static(&vfio_pci_dev_info);
3732 type_init(register_vfio_pci_dev_type)