summaryrefslogtreecommitdiffstats
path: root/qemu/hw/vfio/pci.c
diff options
context:
space:
mode:
Diffstat (limited to 'qemu/hw/vfio/pci.c')
-rw-r--r--qemu/hw/vfio/pci.c2734
1 files changed, 0 insertions, 2734 deletions
diff --git a/qemu/hw/vfio/pci.c b/qemu/hw/vfio/pci.c
deleted file mode 100644
index d091d8cf0..000000000
--- a/qemu/hw/vfio/pci.c
+++ /dev/null
@@ -1,2734 +0,0 @@
-/*
- * vfio based device assignment support
- *
- * Copyright Red Hat, Inc. 2012
- *
- * Authors:
- * Alex Williamson <alex.williamson@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- * Based on qemu-kvm device-assignment:
- * Adapted for KVM by Qumranet.
- * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
- * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
- * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
- * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
- * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
- */
-
-#include "qemu/osdep.h"
-#include <linux/vfio.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-
-#include "hw/pci/msi.h"
-#include "hw/pci/msix.h"
-#include "hw/pci/pci_bridge.h"
-#include "qemu/error-report.h"
-#include "qemu/range.h"
-#include "sysemu/kvm.h"
-#include "sysemu/sysemu.h"
-#include "pci.h"
-#include "trace.h"
-
-#define MSIX_CAP_LENGTH 12
-
-static void vfio_disable_interrupts(VFIOPCIDevice *vdev);
-static void vfio_mmap_set_enabled(VFIOPCIDevice *vdev, bool enabled);
-
-/*
- * Disabling BAR mmaping can be slow, but toggling it around INTx can
- * also be a huge overhead. We try to get the best of both worlds by
- * waiting until an interrupt to disable mmaps (subsequent transitions
- * to the same state are effectively no overhead). If the interrupt has
- * been serviced and the time gap is long enough, we re-enable mmaps for
- * performance. This works well for things like graphics cards, which
- * may not use their interrupt at all and are penalized to an unusable
- * level by read/write BAR traps. Other devices, like NICs, have more
- * regular interrupts and see much better latency by staying in non-mmap
- * mode. We therefore set the default mmap_timeout such that a ping
- * is just enough to keep the mmap disabled. Users can experiment with
- * other options with the x-intx-mmap-timeout-ms parameter (a value of
- * zero disables the timer).
- */
-static void vfio_intx_mmap_enable(void *opaque)
-{
- VFIOPCIDevice *vdev = opaque;
-
- if (vdev->intx.pending) {
- timer_mod(vdev->intx.mmap_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
- return;
- }
-
- vfio_mmap_set_enabled(vdev, true);
-}
-
-static void vfio_intx_interrupt(void *opaque)
-{
- VFIOPCIDevice *vdev = opaque;
-
- if (!event_notifier_test_and_clear(&vdev->intx.interrupt)) {
- return;
- }
-
- trace_vfio_intx_interrupt(vdev->vbasedev.name, 'A' + vdev->intx.pin);
-
- vdev->intx.pending = true;
- pci_irq_assert(&vdev->pdev);
- vfio_mmap_set_enabled(vdev, false);
- if (vdev->intx.mmap_timeout) {
- timer_mod(vdev->intx.mmap_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
- }
-}
-
-static void vfio_intx_eoi(VFIODevice *vbasedev)
-{
- VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
-
- if (!vdev->intx.pending) {
- return;
- }
-
- trace_vfio_intx_eoi(vbasedev->name);
-
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
- vfio_unmask_single_irqindex(vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
-}
-
-static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev)
-{
-#ifdef CONFIG_KVM
- struct kvm_irqfd irqfd = {
- .fd = event_notifier_get_fd(&vdev->intx.interrupt),
- .gsi = vdev->intx.route.irq,
- .flags = KVM_IRQFD_FLAG_RESAMPLE,
- };
- struct vfio_irq_set *irq_set;
- int ret, argsz;
- int32_t *pfd;
-
- if (vdev->no_kvm_intx || !kvm_irqfds_enabled() ||
- vdev->intx.route.mode != PCI_INTX_ENABLED ||
- !kvm_resamplefds_enabled()) {
- return;
- }
-
- /* Get to a known interrupt state */
- qemu_set_fd_handler(irqfd.fd, NULL, NULL, vdev);
- vfio_mask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
-
- /* Get an eventfd for resample/unmask */
- if (event_notifier_init(&vdev->intx.unmask, 0)) {
- error_report("vfio: Error: event_notifier_init failed eoi");
- goto fail;
- }
-
- /* KVM triggers it, VFIO listens for it */
- irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask);
-
- if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
- error_report("vfio: Error: Failed to setup resample irqfd: %m");
- goto fail_irqfd;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_UNMASK;
- irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = irqfd.resamplefd;
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: Error: Failed to setup INTx unmask fd: %m");
- goto fail_vfio;
- }
-
- /* Let'em rip */
- vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
-
- vdev->intx.kvm_accel = true;
-
- trace_vfio_intx_enable_kvm(vdev->vbasedev.name);
-
- return;
-
-fail_vfio:
- irqfd.flags = KVM_IRQFD_FLAG_DEASSIGN;
- kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd);
-fail_irqfd:
- event_notifier_cleanup(&vdev->intx.unmask);
-fail:
- qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
- vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
-#endif
-}
-
-static void vfio_intx_disable_kvm(VFIOPCIDevice *vdev)
-{
-#ifdef CONFIG_KVM
- struct kvm_irqfd irqfd = {
- .fd = event_notifier_get_fd(&vdev->intx.interrupt),
- .gsi = vdev->intx.route.irq,
- .flags = KVM_IRQFD_FLAG_DEASSIGN,
- };
-
- if (!vdev->intx.kvm_accel) {
- return;
- }
-
- /*
- * Get to a known state, hardware masked, QEMU ready to accept new
- * interrupts, QEMU IRQ de-asserted.
- */
- vfio_mask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
-
- /* Tell KVM to stop listening for an INTx irqfd */
- if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
- error_report("vfio: Error: Failed to disable INTx irqfd: %m");
- }
-
- /* We only need to close the eventfd for VFIO to cleanup the kernel side */
- event_notifier_cleanup(&vdev->intx.unmask);
-
- /* QEMU starts listening for interrupt events. */
- qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
-
- vdev->intx.kvm_accel = false;
-
- /* If we've missed an event, let it re-fire through QEMU */
- vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
-
- trace_vfio_intx_disable_kvm(vdev->vbasedev.name);
-#endif
-}
-
-static void vfio_intx_update(PCIDevice *pdev)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- PCIINTxRoute route;
-
- if (vdev->interrupt != VFIO_INT_INTx) {
- return;
- }
-
- route = pci_device_route_intx_to_irq(&vdev->pdev, vdev->intx.pin);
-
- if (!pci_intx_route_changed(&vdev->intx.route, &route)) {
- return; /* Nothing changed */
- }
-
- trace_vfio_intx_update(vdev->vbasedev.name,
- vdev->intx.route.irq, route.irq);
-
- vfio_intx_disable_kvm(vdev);
-
- vdev->intx.route = route;
-
- if (route.mode != PCI_INTX_ENABLED) {
- return;
- }
-
- vfio_intx_enable_kvm(vdev);
-
- /* Re-enable the interrupt in cased we missed an EOI */
- vfio_intx_eoi(&vdev->vbasedev);
-}
-
-static int vfio_intx_enable(VFIOPCIDevice *vdev)
-{
- uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
- int ret, argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!pin) {
- return 0;
- }
-
- vfio_disable_interrupts(vdev);
-
- vdev->intx.pin = pin - 1; /* Pin A (1) -> irq[0] */
- pci_config_set_interrupt_pin(vdev->pdev.config, pin);
-
-#ifdef CONFIG_KVM
- /*
- * Only conditional to avoid generating error messages on platforms
- * where we won't actually use the result anyway.
- */
- if (kvm_irqfds_enabled() && kvm_resamplefds_enabled()) {
- vdev->intx.route = pci_device_route_intx_to_irq(&vdev->pdev,
- vdev->intx.pin);
- }
-#endif
-
- ret = event_notifier_init(&vdev->intx.interrupt, 0);
- if (ret) {
- error_report("vfio: Error: event_notifier_init failed");
- return ret;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vdev->intx.interrupt);
- qemu_set_fd_handler(*pfd, vfio_intx_interrupt, NULL, vdev);
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: Error: Failed to setup INTx fd: %m");
- qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->intx.interrupt);
- return -errno;
- }
-
- vfio_intx_enable_kvm(vdev);
-
- vdev->interrupt = VFIO_INT_INTx;
-
- trace_vfio_intx_enable(vdev->vbasedev.name);
-
- return 0;
-}
-
-static void vfio_intx_disable(VFIOPCIDevice *vdev)
-{
- int fd;
-
- timer_del(vdev->intx.mmap_timer);
- vfio_intx_disable_kvm(vdev);
- vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
- vfio_mmap_set_enabled(vdev, true);
-
- fd = event_notifier_get_fd(&vdev->intx.interrupt);
- qemu_set_fd_handler(fd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->intx.interrupt);
-
- vdev->interrupt = VFIO_INT_NONE;
-
- trace_vfio_intx_disable(vdev->vbasedev.name);
-}
-
-/*
- * MSI/X
- */
-static void vfio_msi_interrupt(void *opaque)
-{
- VFIOMSIVector *vector = opaque;
- VFIOPCIDevice *vdev = vector->vdev;
- MSIMessage (*get_msg)(PCIDevice *dev, unsigned vector);
- void (*notify)(PCIDevice *dev, unsigned vector);
- MSIMessage msg;
- int nr = vector - vdev->msi_vectors;
-
- if (!event_notifier_test_and_clear(&vector->interrupt)) {
- return;
- }
-
- if (vdev->interrupt == VFIO_INT_MSIX) {
- get_msg = msix_get_message;
- notify = msix_notify;
-
- /* A masked vector firing needs to use the PBA, enable it */
- if (msix_is_masked(&vdev->pdev, nr)) {
- set_bit(nr, vdev->msix->pending);
- memory_region_set_enabled(&vdev->pdev.msix_pba_mmio, true);
- trace_vfio_msix_pba_enable(vdev->vbasedev.name);
- }
- } else if (vdev->interrupt == VFIO_INT_MSI) {
- get_msg = msi_get_message;
- notify = msi_notify;
- } else {
- abort();
- }
-
- msg = get_msg(&vdev->pdev, nr);
- trace_vfio_msi_interrupt(vdev->vbasedev.name, nr, msg.address, msg.data);
- notify(&vdev->pdev, nr);
-}
-
-static int vfio_enable_vectors(VFIOPCIDevice *vdev, bool msix)
-{
- struct vfio_irq_set *irq_set;
- int ret = 0, i, argsz;
- int32_t *fds;
-
- argsz = sizeof(*irq_set) + (vdev->nr_vectors * sizeof(*fds));
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = msix ? VFIO_PCI_MSIX_IRQ_INDEX : VFIO_PCI_MSI_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = vdev->nr_vectors;
- fds = (int32_t *)&irq_set->data;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- int fd = -1;
-
- /*
- * MSI vs MSI-X - The guest has direct access to MSI mask and pending
- * bits, therefore we always use the KVM signaling path when setup.
- * MSI-X mask and pending bits are emulated, so we want to use the
- * KVM signaling path only when configured and unmasked.
- */
- if (vdev->msi_vectors[i].use) {
- if (vdev->msi_vectors[i].virq < 0 ||
- (msix && msix_is_masked(&vdev->pdev, i))) {
- fd = event_notifier_get_fd(&vdev->msi_vectors[i].interrupt);
- } else {
- fd = event_notifier_get_fd(&vdev->msi_vectors[i].kvm_interrupt);
- }
- }
-
- fds[i] = fd;
- }
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
-
- g_free(irq_set);
-
- return ret;
-}
-
-static void vfio_add_kvm_msi_virq(VFIOPCIDevice *vdev, VFIOMSIVector *vector,
- MSIMessage *msg, bool msix)
-{
- int virq;
-
- if ((msix && vdev->no_kvm_msix) || (!msix && vdev->no_kvm_msi) || !msg) {
- return;
- }
-
- if (event_notifier_init(&vector->kvm_interrupt, 0)) {
- return;
- }
-
- virq = kvm_irqchip_add_msi_route(kvm_state, *msg, &vdev->pdev);
- if (virq < 0) {
- event_notifier_cleanup(&vector->kvm_interrupt);
- return;
- }
-
- if (kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, &vector->kvm_interrupt,
- NULL, virq) < 0) {
- kvm_irqchip_release_virq(kvm_state, virq);
- event_notifier_cleanup(&vector->kvm_interrupt);
- return;
- }
-
- vector->virq = virq;
-}
-
-static void vfio_remove_kvm_msi_virq(VFIOMSIVector *vector)
-{
- kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, &vector->kvm_interrupt,
- vector->virq);
- kvm_irqchip_release_virq(kvm_state, vector->virq);
- vector->virq = -1;
- event_notifier_cleanup(&vector->kvm_interrupt);
-}
-
-static void vfio_update_kvm_msi_virq(VFIOMSIVector *vector, MSIMessage msg,
- PCIDevice *pdev)
-{
- kvm_irqchip_update_msi_route(kvm_state, vector->virq, msg, pdev);
-}
-
-static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
- MSIMessage *msg, IOHandler *handler)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- VFIOMSIVector *vector;
- int ret;
-
- trace_vfio_msix_vector_do_use(vdev->vbasedev.name, nr);
-
- vector = &vdev->msi_vectors[nr];
-
- if (!vector->use) {
- vector->vdev = vdev;
- vector->virq = -1;
- if (event_notifier_init(&vector->interrupt, 0)) {
- error_report("vfio: Error: event_notifier_init failed");
- }
- vector->use = true;
- msix_vector_use(pdev, nr);
- }
-
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- handler, NULL, vector);
-
- /*
- * Attempt to enable route through KVM irqchip,
- * default to userspace handling if unavailable.
- */
- if (vector->virq >= 0) {
- if (!msg) {
- vfio_remove_kvm_msi_virq(vector);
- } else {
- vfio_update_kvm_msi_virq(vector, *msg, pdev);
- }
- } else {
- vfio_add_kvm_msi_virq(vdev, vector, msg, true);
- }
-
- /*
- * We don't want to have the host allocate all possible MSI vectors
- * for a device if they're not in use, so we shutdown and incrementally
- * increase them as needed.
- */
- if (vdev->nr_vectors < nr + 1) {
- vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSIX_IRQ_INDEX);
- vdev->nr_vectors = nr + 1;
- ret = vfio_enable_vectors(vdev, true);
- if (ret) {
- error_report("vfio: failed to enable vectors, %d", ret);
- }
- } else {
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
- irq_set->start = nr;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- if (vector->virq >= 0) {
- *pfd = event_notifier_get_fd(&vector->kvm_interrupt);
- } else {
- *pfd = event_notifier_get_fd(&vector->interrupt);
- }
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: failed to modify vector, %d", ret);
- }
- }
-
- /* Disable PBA emulation when nothing more is pending. */
- clear_bit(nr, vdev->msix->pending);
- if (find_first_bit(vdev->msix->pending,
- vdev->nr_vectors) == vdev->nr_vectors) {
- memory_region_set_enabled(&vdev->pdev.msix_pba_mmio, false);
- trace_vfio_msix_pba_disable(vdev->vbasedev.name);
- }
-
- return 0;
-}
-
-static int vfio_msix_vector_use(PCIDevice *pdev,
- unsigned int nr, MSIMessage msg)
-{
- return vfio_msix_vector_do_use(pdev, nr, &msg, vfio_msi_interrupt);
-}
-
-static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- VFIOMSIVector *vector = &vdev->msi_vectors[nr];
-
- trace_vfio_msix_vector_release(vdev->vbasedev.name, nr);
-
- /*
- * There are still old guests that mask and unmask vectors on every
- * interrupt. If we're using QEMU bypass with a KVM irqfd, leave all of
- * the KVM setup in place, simply switch VFIO to use the non-bypass
- * eventfd. We'll then fire the interrupt through QEMU and the MSI-X
- * core will mask the interrupt and set pending bits, allowing it to
- * be re-asserted on unmask. Nothing to do if already using QEMU mode.
- */
- if (vector->virq >= 0) {
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
- irq_set->start = nr;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vector->interrupt);
-
- ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
-
- g_free(irq_set);
- }
-}
-
-static void vfio_msix_enable(VFIOPCIDevice *vdev)
-{
- vfio_disable_interrupts(vdev);
-
- vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->msix->entries);
-
- vdev->interrupt = VFIO_INT_MSIX;
-
- /*
- * Some communication channels between VF & PF or PF & fw rely on the
- * physical state of the device and expect that enabling MSI-X from the
- * guest enables the same on the host. When our guest is Linux, the
- * guest driver call to pci_enable_msix() sets the enabling bit in the
- * MSI-X capability, but leaves the vector table masked. We therefore
- * can't rely on a vector_use callback (from request_irq() in the guest)
- * to switch the physical device into MSI-X mode because that may come a
- * long time after pci_enable_msix(). This code enables vector 0 with
- * triggering to userspace, then immediately release the vector, leaving
- * the physical device with no vectors enabled, but MSI-X enabled, just
- * like the guest view.
- */
- vfio_msix_vector_do_use(&vdev->pdev, 0, NULL, NULL);
- vfio_msix_vector_release(&vdev->pdev, 0);
-
- if (msix_set_vector_notifiers(&vdev->pdev, vfio_msix_vector_use,
- vfio_msix_vector_release, NULL)) {
- error_report("vfio: msix_set_vector_notifiers failed");
- }
-
- trace_vfio_msix_enable(vdev->vbasedev.name);
-}
-
-static void vfio_msi_enable(VFIOPCIDevice *vdev)
-{
- int ret, i;
-
- vfio_disable_interrupts(vdev);
-
- vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
-retry:
- vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->nr_vectors);
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- MSIMessage msg = msi_get_message(&vdev->pdev, i);
-
- vector->vdev = vdev;
- vector->virq = -1;
- vector->use = true;
-
- if (event_notifier_init(&vector->interrupt, 0)) {
- error_report("vfio: Error: event_notifier_init failed");
- }
-
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- vfio_msi_interrupt, NULL, vector);
-
- /*
- * Attempt to enable route through KVM irqchip,
- * default to userspace handling if unavailable.
- */
- vfio_add_kvm_msi_virq(vdev, vector, &msg, false);
- }
-
- /* Set interrupt type prior to possible interrupts */
- vdev->interrupt = VFIO_INT_MSI;
-
- ret = vfio_enable_vectors(vdev, false);
- if (ret) {
- if (ret < 0) {
- error_report("vfio: Error: Failed to setup MSI fds: %m");
- } else if (ret != vdev->nr_vectors) {
- error_report("vfio: Error: Failed to enable %d "
- "MSI vectors, retry with %d", vdev->nr_vectors, ret);
- }
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- if (vector->virq >= 0) {
- vfio_remove_kvm_msi_virq(vector);
- }
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- NULL, NULL, NULL);
- event_notifier_cleanup(&vector->interrupt);
- }
-
- g_free(vdev->msi_vectors);
-
- if (ret > 0 && ret != vdev->nr_vectors) {
- vdev->nr_vectors = ret;
- goto retry;
- }
- vdev->nr_vectors = 0;
-
- /*
- * Failing to setup MSI doesn't really fall within any specification.
- * Let's try leaving interrupts disabled and hope the guest figures
- * out to fall back to INTx for this device.
- */
- error_report("vfio: Error: Failed to enable MSI");
- vdev->interrupt = VFIO_INT_NONE;
-
- return;
- }
-
- trace_vfio_msi_enable(vdev->vbasedev.name, vdev->nr_vectors);
-}
-
-static void vfio_msi_disable_common(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- if (vdev->msi_vectors[i].use) {
- if (vector->virq >= 0) {
- vfio_remove_kvm_msi_virq(vector);
- }
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- NULL, NULL, NULL);
- event_notifier_cleanup(&vector->interrupt);
- }
- }
-
- g_free(vdev->msi_vectors);
- vdev->msi_vectors = NULL;
- vdev->nr_vectors = 0;
- vdev->interrupt = VFIO_INT_NONE;
-
- vfio_intx_enable(vdev);
-}
-
-static void vfio_msix_disable(VFIOPCIDevice *vdev)
-{
- int i;
-
- msix_unset_vector_notifiers(&vdev->pdev);
-
- /*
- * MSI-X will only release vectors if MSI-X is still enabled on the
- * device, check through the rest and release it ourselves if necessary.
- */
- for (i = 0; i < vdev->nr_vectors; i++) {
- if (vdev->msi_vectors[i].use) {
- vfio_msix_vector_release(&vdev->pdev, i);
- msix_vector_unuse(&vdev->pdev, i);
- }
- }
-
- if (vdev->nr_vectors) {
- vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSIX_IRQ_INDEX);
- }
-
- vfio_msi_disable_common(vdev);
-
- memset(vdev->msix->pending, 0,
- BITS_TO_LONGS(vdev->msix->entries) * sizeof(unsigned long));
-
- trace_vfio_msix_disable(vdev->vbasedev.name);
-}
-
-static void vfio_msi_disable(VFIOPCIDevice *vdev)
-{
- vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSI_IRQ_INDEX);
- vfio_msi_disable_common(vdev);
-
- trace_vfio_msi_disable(vdev->vbasedev.name);
-}
-
-static void vfio_update_msi(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- MSIMessage msg;
-
- if (!vector->use || vector->virq < 0) {
- continue;
- }
-
- msg = msi_get_message(&vdev->pdev, i);
- vfio_update_kvm_msi_virq(vector, msg, &vdev->pdev);
- }
-}
-
-static void vfio_pci_load_rom(VFIOPCIDevice *vdev)
-{
- struct vfio_region_info *reg_info;
- uint64_t size;
- off_t off = 0;
- ssize_t bytes;
-
- if (vfio_get_region_info(&vdev->vbasedev,
- VFIO_PCI_ROM_REGION_INDEX, &reg_info)) {
- error_report("vfio: Error getting ROM info: %m");
- return;
- }
-
- trace_vfio_pci_load_rom(vdev->vbasedev.name, (unsigned long)reg_info->size,
- (unsigned long)reg_info->offset,
- (unsigned long)reg_info->flags);
-
- vdev->rom_size = size = reg_info->size;
- vdev->rom_offset = reg_info->offset;
-
- g_free(reg_info);
-
- if (!vdev->rom_size) {
- vdev->rom_read_failed = true;
- error_report("vfio-pci: Cannot read device rom at "
- "%s", vdev->vbasedev.name);
- error_printf("Device option ROM contents are probably invalid "
- "(check dmesg).\nSkip option ROM probe with rombar=0, "
- "or load from file with romfile=\n");
- return;
- }
-
- vdev->rom = g_malloc(size);
- memset(vdev->rom, 0xff, size);
-
- while (size) {
- bytes = pread(vdev->vbasedev.fd, vdev->rom + off,
- size, vdev->rom_offset + off);
- if (bytes == 0) {
- break;
- } else if (bytes > 0) {
- off += bytes;
- size -= bytes;
- } else {
- if (errno == EINTR || errno == EAGAIN) {
- continue;
- }
- error_report("vfio: Error reading device ROM: %m");
- break;
- }
- }
-
- /*
- * Test the ROM signature against our device, if the vendor is correct
- * but the device ID doesn't match, store the correct device ID and
- * recompute the checksum. Intel IGD devices need this and are known
- * to have bogus checksums so we can't simply adjust the checksum.
- */
- if (pci_get_word(vdev->rom) == 0xaa55 &&
- pci_get_word(vdev->rom + 0x18) + 8 < vdev->rom_size &&
- !memcmp(vdev->rom + pci_get_word(vdev->rom + 0x18), "PCIR", 4)) {
- uint16_t vid, did;
-
- vid = pci_get_word(vdev->rom + pci_get_word(vdev->rom + 0x18) + 4);
- did = pci_get_word(vdev->rom + pci_get_word(vdev->rom + 0x18) + 6);
-
- if (vid == vdev->vendor_id && did != vdev->device_id) {
- int i;
- uint8_t csum, *data = vdev->rom;
-
- pci_set_word(vdev->rom + pci_get_word(vdev->rom + 0x18) + 6,
- vdev->device_id);
- data[6] = 0;
-
- for (csum = 0, i = 0; i < vdev->rom_size; i++) {
- csum += data[i];
- }
-
- data[6] = -csum;
- }
- }
-}
-
-static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size)
-{
- VFIOPCIDevice *vdev = opaque;
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } val;
- uint64_t data = 0;
-
- /* Load the ROM lazily when the guest tries to read it */
- if (unlikely(!vdev->rom && !vdev->rom_read_failed)) {
- vfio_pci_load_rom(vdev);
- }
-
- memcpy(&val, vdev->rom + addr,
- (addr < vdev->rom_size) ? MIN(size, vdev->rom_size - addr) : 0);
-
- switch (size) {
- case 1:
- data = val.byte;
- break;
- case 2:
- data = le16_to_cpu(val.word);
- break;
- case 4:
- data = le32_to_cpu(val.dword);
- break;
- default:
- hw_error("vfio: unsupported read size, %d bytes\n", size);
- break;
- }
-
- trace_vfio_rom_read(vdev->vbasedev.name, addr, size, data);
-
- return data;
-}
-
-static void vfio_rom_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
-}
-
-static const MemoryRegionOps vfio_rom_ops = {
- .read = vfio_rom_read,
- .write = vfio_rom_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_pci_size_rom(VFIOPCIDevice *vdev)
-{
- uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK);
- off_t offset = vdev->config_offset + PCI_ROM_ADDRESS;
- DeviceState *dev = DEVICE(vdev);
- char *name;
- int fd = vdev->vbasedev.fd;
-
- if (vdev->pdev.romfile || !vdev->pdev.rom_bar) {
- /* Since pci handles romfile, just print a message and return */
- if (vfio_blacklist_opt_rom(vdev) && vdev->pdev.romfile) {
- error_printf("Warning : Device at %s is known to cause system instability issues during option rom execution. Proceeding anyway since user specified romfile\n",
- vdev->vbasedev.name);
- }
- return;
- }
-
- /*
- * Use the same size ROM BAR as the physical device. The contents
- * will get filled in later when the guest tries to read it.
- */
- if (pread(fd, &orig, 4, offset) != 4 ||
- pwrite(fd, &size, 4, offset) != 4 ||
- pread(fd, &size, 4, offset) != 4 ||
- pwrite(fd, &orig, 4, offset) != 4) {
- error_report("%s(%s) failed: %m", __func__, vdev->vbasedev.name);
- return;
- }
-
- size = ~(le32_to_cpu(size) & PCI_ROM_ADDRESS_MASK) + 1;
-
- if (!size) {
- return;
- }
-
- if (vfio_blacklist_opt_rom(vdev)) {
- if (dev->opts && qemu_opt_get(dev->opts, "rombar")) {
- error_printf("Warning : Device at %s is known to cause system instability issues during option rom execution. Proceeding anyway since user specified non zero value for rombar\n",
- vdev->vbasedev.name);
- } else {
- error_printf("Warning : Rom loading for device at %s has been disabled due to system instability issues. Specify rombar=1 or romfile to force\n",
- vdev->vbasedev.name);
- return;
- }
- }
-
- trace_vfio_pci_size_rom(vdev->vbasedev.name, size);
-
- name = g_strdup_printf("vfio[%s].rom", vdev->vbasedev.name);
-
- memory_region_init_io(&vdev->pdev.rom, OBJECT(vdev),
- &vfio_rom_ops, vdev, name, size);
- g_free(name);
-
- pci_register_bar(&vdev->pdev, PCI_ROM_SLOT,
- PCI_BASE_ADDRESS_SPACE_MEMORY, &vdev->pdev.rom);
-
- vdev->pdev.has_rom = true;
- vdev->rom_read_failed = false;
-}
-
-void vfio_vga_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOVGARegion *region = opaque;
- VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
- off_t offset = vga->fd_offset + region->offset + addr;
-
- switch (size) {
- case 1:
- buf.byte = data;
- break;
- case 2:
- buf.word = cpu_to_le16(data);
- break;
- case 4:
- buf.dword = cpu_to_le32(data);
- break;
- default:
- hw_error("vfio: unsupported write size, %d bytes", size);
- break;
- }
-
- if (pwrite(vga->fd, &buf, size, offset) != size) {
- error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m",
- __func__, region->offset + addr, data, size);
- }
-
- trace_vfio_vga_write(region->offset + addr, data, size);
-}
-
-uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size)
-{
- VFIOVGARegion *region = opaque;
- VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
- uint64_t data = 0;
- off_t offset = vga->fd_offset + region->offset + addr;
-
- if (pread(vga->fd, &buf, size, offset) != size) {
- error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m",
- __func__, region->offset + addr, size);
- return (uint64_t)-1;
- }
-
- switch (size) {
- case 1:
- data = buf.byte;
- break;
- case 2:
- data = le16_to_cpu(buf.word);
- break;
- case 4:
- data = le32_to_cpu(buf.dword);
- break;
- default:
- hw_error("vfio: unsupported read size, %d bytes", size);
- break;
- }
-
- trace_vfio_vga_read(region->offset + addr, size, data);
-
- return data;
-}
-
-static const MemoryRegionOps vfio_vga_ops = {
- .read = vfio_vga_read,
- .write = vfio_vga_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-/*
- * PCI config space
- */
-uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- uint32_t emu_bits = 0, emu_val = 0, phys_val = 0, val;
-
- memcpy(&emu_bits, vdev->emulated_config_bits + addr, len);
- emu_bits = le32_to_cpu(emu_bits);
-
- if (emu_bits) {
- emu_val = pci_default_read_config(pdev, addr, len);
- }
-
- if (~emu_bits & (0xffffffffU >> (32 - len * 8))) {
- ssize_t ret;
-
- ret = pread(vdev->vbasedev.fd, &phys_val, len,
- vdev->config_offset + addr);
- if (ret != len) {
- error_report("%s(%s, 0x%x, 0x%x) failed: %m",
- __func__, vdev->vbasedev.name, addr, len);
- return -errno;
- }
- phys_val = le32_to_cpu(phys_val);
- }
-
- val = (emu_val & emu_bits) | (phys_val & ~emu_bits);
-
- trace_vfio_pci_read_config(vdev->vbasedev.name, addr, len, val);
-
- return val;
-}
-
-void vfio_pci_write_config(PCIDevice *pdev,
- uint32_t addr, uint32_t val, int len)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- uint32_t val_le = cpu_to_le32(val);
-
- trace_vfio_pci_write_config(vdev->vbasedev.name, addr, val, len);
-
- /* Write everything to VFIO, let it filter out what we can't write */
- if (pwrite(vdev->vbasedev.fd, &val_le, len, vdev->config_offset + addr)
- != len) {
- error_report("%s(%s, 0x%x, 0x%x, 0x%x) failed: %m",
- __func__, vdev->vbasedev.name, addr, val, len);
- }
-
- /* MSI/MSI-X Enabling/Disabling */
- if (pdev->cap_present & QEMU_PCI_CAP_MSI &&
- ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size)) {
- int is_enabled, was_enabled = msi_enabled(pdev);
-
- pci_default_write_config(pdev, addr, val, len);
-
- is_enabled = msi_enabled(pdev);
-
- if (!was_enabled) {
- if (is_enabled) {
- vfio_msi_enable(vdev);
- }
- } else {
- if (!is_enabled) {
- vfio_msi_disable(vdev);
- } else {
- vfio_update_msi(vdev);
- }
- }
- } else if (pdev->cap_present & QEMU_PCI_CAP_MSIX &&
- ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) {
- int is_enabled, was_enabled = msix_enabled(pdev);
-
- pci_default_write_config(pdev, addr, val, len);
-
- is_enabled = msix_enabled(pdev);
-
- if (!was_enabled && is_enabled) {
- vfio_msix_enable(vdev);
- } else if (was_enabled && !is_enabled) {
- vfio_msix_disable(vdev);
- }
- } else {
- /* Write everything to QEMU to keep emulated bits correct */
- pci_default_write_config(pdev, addr, val, len);
- }
-}
-
-/*
- * Interrupt setup
- */
-static void vfio_disable_interrupts(VFIOPCIDevice *vdev)
-{
- /*
- * More complicated than it looks. Disabling MSI/X transitions the
- * device to INTx mode (if supported). Therefore we need to first
- * disable MSI/X and then cleanup by disabling INTx.
- */
- if (vdev->interrupt == VFIO_INT_MSIX) {
- vfio_msix_disable(vdev);
- } else if (vdev->interrupt == VFIO_INT_MSI) {
- vfio_msi_disable(vdev);
- }
-
- if (vdev->interrupt == VFIO_INT_INTx) {
- vfio_intx_disable(vdev);
- }
-}
-
-static int vfio_msi_setup(VFIOPCIDevice *vdev, int pos)
-{
- uint16_t ctrl;
- bool msi_64bit, msi_maskbit;
- int ret, entries;
-
- if (pread(vdev->vbasedev.fd, &ctrl, sizeof(ctrl),
- vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
- return -errno;
- }
- ctrl = le16_to_cpu(ctrl);
-
- msi_64bit = !!(ctrl & PCI_MSI_FLAGS_64BIT);
- msi_maskbit = !!(ctrl & PCI_MSI_FLAGS_MASKBIT);
- entries = 1 << ((ctrl & PCI_MSI_FLAGS_QMASK) >> 1);
-
- trace_vfio_msi_setup(vdev->vbasedev.name, pos);
-
- ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit);
- if (ret < 0) {
- if (ret == -ENOTSUP) {
- return 0;
- }
- error_report("vfio: msi_init failed");
- return ret;
- }
- vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0);
-
- return 0;
-}
-
-static void vfio_pci_fixup_msix_region(VFIOPCIDevice *vdev)
-{
- off_t start, end;
- VFIORegion *region = &vdev->bars[vdev->msix->table_bar].region;
-
- /*
- * We expect to find a single mmap covering the whole BAR, anything else
- * means it's either unsupported or already setup.
- */
- if (region->nr_mmaps != 1 || region->mmaps[0].offset ||
- region->size != region->mmaps[0].size) {
- return;
- }
-
- /* MSI-X table start and end aligned to host page size */
- start = vdev->msix->table_offset & qemu_real_host_page_mask;
- end = REAL_HOST_PAGE_ALIGN((uint64_t)vdev->msix->table_offset +
- (vdev->msix->entries * PCI_MSIX_ENTRY_SIZE));
-
- /*
- * Does the MSI-X table cover the beginning of the BAR? The whole BAR?
- * NB - Host page size is necessarily a power of two and so is the PCI
- * BAR (not counting EA yet), therefore if we have host page aligned
- * @start and @end, then any remainder of the BAR before or after those
- * must be at least host page sized and therefore mmap'able.
- */
- if (!start) {
- if (end >= region->size) {
- region->nr_mmaps = 0;
- g_free(region->mmaps);
- region->mmaps = NULL;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, 0, 0);
- } else {
- region->mmaps[0].offset = end;
- region->mmaps[0].size = region->size - end;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, region->mmaps[0].offset,
- region->mmaps[0].offset + region->mmaps[0].size);
- }
-
- /* Maybe it's aligned at the end of the BAR */
- } else if (end >= region->size) {
- region->mmaps[0].size = start;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, region->mmaps[0].offset,
- region->mmaps[0].offset + region->mmaps[0].size);
-
- /* Otherwise it must split the BAR */
- } else {
- region->nr_mmaps = 2;
- region->mmaps = g_renew(VFIOMmap, region->mmaps, 2);
-
- memcpy(&region->mmaps[1], &region->mmaps[0], sizeof(VFIOMmap));
-
- region->mmaps[0].size = start;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, region->mmaps[0].offset,
- region->mmaps[0].offset + region->mmaps[0].size);
-
- region->mmaps[1].offset = end;
- region->mmaps[1].size = region->size - end;
- trace_vfio_msix_fixup(vdev->vbasedev.name,
- vdev->msix->table_bar, region->mmaps[1].offset,
- region->mmaps[1].offset + region->mmaps[1].size);
- }
-}
-
-/*
- * We don't have any control over how pci_add_capability() inserts
- * capabilities into the chain. In order to setup MSI-X we need a
- * MemoryRegion for the BAR. In order to setup the BAR and not
- * attempt to mmap the MSI-X table area, which VFIO won't allow, we
- * need to first look for where the MSI-X table lives. So we
- * unfortunately split MSI-X setup across two functions.
- */
-static int vfio_msix_early_setup(VFIOPCIDevice *vdev)
-{
- uint8_t pos;
- uint16_t ctrl;
- uint32_t table, pba;
- int fd = vdev->vbasedev.fd;
- VFIOMSIXInfo *msix;
-
- pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
- if (!pos) {
- return 0;
- }
-
- if (pread(fd, &ctrl, sizeof(ctrl),
- vdev->config_offset + pos + PCI_MSIX_FLAGS) != sizeof(ctrl)) {
- return -errno;
- }
-
- if (pread(fd, &table, sizeof(table),
- vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
- return -errno;
- }
-
- if (pread(fd, &pba, sizeof(pba),
- vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
- return -errno;
- }
-
- ctrl = le16_to_cpu(ctrl);
- table = le32_to_cpu(table);
- pba = le32_to_cpu(pba);
-
- msix = g_malloc0(sizeof(*msix));
- msix->table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
- msix->table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
- msix->pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
- msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
- msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
-
- /*
- * Test the size of the pba_offset variable and catch if it extends outside
- * of the specified BAR. If it is the case, we need to apply a hardware
- * specific quirk if the device is known or we have a broken configuration.
- */
- if (msix->pba_offset >= vdev->bars[msix->pba_bar].region.size) {
- /*
- * Chelsio T5 Virtual Function devices are encoded as 0x58xx for T5
- * adapters. The T5 hardware returns an incorrect value of 0x8000 for
- * the VF PBA offset while the BAR itself is only 8k. The correct value
- * is 0x1000, so we hard code that here.
- */
- if (vdev->vendor_id == PCI_VENDOR_ID_CHELSIO &&
- (vdev->device_id & 0xff00) == 0x5800) {
- msix->pba_offset = 0x1000;
- } else {
- error_report("vfio: Hardware reports invalid configuration, "
- "MSIX PBA outside of specified BAR");
- g_free(msix);
- return -EINVAL;
- }
- }
-
- trace_vfio_msix_early_setup(vdev->vbasedev.name, pos, msix->table_bar,
- msix->table_offset, msix->entries);
- vdev->msix = msix;
-
- vfio_pci_fixup_msix_region(vdev);
-
- return 0;
-}
-
-static int vfio_msix_setup(VFIOPCIDevice *vdev, int pos)
-{
- int ret;
-
- vdev->msix->pending = g_malloc0(BITS_TO_LONGS(vdev->msix->entries) *
- sizeof(unsigned long));
- ret = msix_init(&vdev->pdev, vdev->msix->entries,
- vdev->bars[vdev->msix->table_bar].region.mem,
- vdev->msix->table_bar, vdev->msix->table_offset,
- vdev->bars[vdev->msix->pba_bar].region.mem,
- vdev->msix->pba_bar, vdev->msix->pba_offset, pos);
- if (ret < 0) {
- if (ret == -ENOTSUP) {
- return 0;
- }
- error_report("vfio: msix_init failed");
- return ret;
- }
-
- /*
- * The PCI spec suggests that devices provide additional alignment for
- * MSI-X structures and avoid overlapping non-MSI-X related registers.
- * For an assigned device, this hopefully means that emulation of MSI-X
- * structures does not affect the performance of the device. If devices
- * fail to provide that alignment, a significant performance penalty may
- * result, for instance Mellanox MT27500 VFs:
- * http://www.spinics.net/lists/kvm/msg125881.html
- *
- * The PBA is simply not that important for such a serious regression and
- * most drivers do not appear to look at it. The solution for this is to
- * disable the PBA MemoryRegion unless it's being used. We disable it
- * here and only enable it if a masked vector fires through QEMU. As the
- * vector-use notifier is called, which occurs on unmask, we test whether
- * PBA emulation is needed and again disable if not.
- */
- memory_region_set_enabled(&vdev->pdev.msix_pba_mmio, false);
-
- return 0;
-}
-
-static void vfio_teardown_msi(VFIOPCIDevice *vdev)
-{
- msi_uninit(&vdev->pdev);
-
- if (vdev->msix) {
- msix_uninit(&vdev->pdev,
- vdev->bars[vdev->msix->table_bar].region.mem,
- vdev->bars[vdev->msix->pba_bar].region.mem);
- g_free(vdev->msix->pending);
- }
-}
-
-/*
- * Resource setup
- */
-static void vfio_mmap_set_enabled(VFIOPCIDevice *vdev, bool enabled)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_region_mmaps_set_enabled(&vdev->bars[i].region, enabled);
- }
-}
-
-static void vfio_bar_setup(VFIOPCIDevice *vdev, int nr)
-{
- VFIOBAR *bar = &vdev->bars[nr];
-
- uint32_t pci_bar;
- uint8_t type;
- int ret;
-
- /* Skip both unimplemented BARs and the upper half of 64bit BARS. */
- if (!bar->region.size) {
- return;
- }
-
- /* Determine what type of BAR this is for registration */
- ret = pread(vdev->vbasedev.fd, &pci_bar, sizeof(pci_bar),
- vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
- if (ret != sizeof(pci_bar)) {
- error_report("vfio: Failed to read BAR %d (%m)", nr);
- return;
- }
-
- pci_bar = le32_to_cpu(pci_bar);
- bar->ioport = (pci_bar & PCI_BASE_ADDRESS_SPACE_IO);
- bar->mem64 = bar->ioport ? 0 : (pci_bar & PCI_BASE_ADDRESS_MEM_TYPE_64);
- type = pci_bar & (bar->ioport ? ~PCI_BASE_ADDRESS_IO_MASK :
- ~PCI_BASE_ADDRESS_MEM_MASK);
-
- if (vfio_region_mmap(&bar->region)) {
- error_report("Failed to mmap %s BAR %d. Performance may be slow",
- vdev->vbasedev.name, nr);
- }
-
- vfio_bar_quirk_setup(vdev, nr);
-
- pci_register_bar(&vdev->pdev, nr, type, bar->region.mem);
-}
-
-static void vfio_bars_setup(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_bar_setup(vdev, i);
- }
-
- if (vdev->vga) {
- memory_region_init_io(&vdev->vga->region[QEMU_PCI_VGA_MEM].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga->region[QEMU_PCI_VGA_MEM],
- "vfio-vga-mmio@0xa0000",
- QEMU_PCI_VGA_MEM_SIZE);
- memory_region_init_io(&vdev->vga->region[QEMU_PCI_VGA_IO_LO].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga->region[QEMU_PCI_VGA_IO_LO],
- "vfio-vga-io@0x3b0",
- QEMU_PCI_VGA_IO_LO_SIZE);
- memory_region_init_io(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga->region[QEMU_PCI_VGA_IO_HI],
- "vfio-vga-io@0x3c0",
- QEMU_PCI_VGA_IO_HI_SIZE);
-
- pci_register_vga(&vdev->pdev, &vdev->vga->region[QEMU_PCI_VGA_MEM].mem,
- &vdev->vga->region[QEMU_PCI_VGA_IO_LO].mem,
- &vdev->vga->region[QEMU_PCI_VGA_IO_HI].mem);
- vfio_vga_quirk_setup(vdev);
- }
-}
-
-static void vfio_bars_exit(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_bar_quirk_exit(vdev, i);
- vfio_region_exit(&vdev->bars[i].region);
- }
-
- if (vdev->vga) {
- pci_unregister_vga(&vdev->pdev);
- vfio_vga_quirk_exit(vdev);
- }
-}
-
-static void vfio_bars_finalize(VFIOPCIDevice *vdev)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_bar_quirk_finalize(vdev, i);
- vfio_region_finalize(&vdev->bars[i].region);
- }
-
- if (vdev->vga) {
- vfio_vga_quirk_finalize(vdev);
- for (i = 0; i < ARRAY_SIZE(vdev->vga->region); i++) {
- object_unparent(OBJECT(&vdev->vga->region[i].mem));
- }
- g_free(vdev->vga);
- }
-}
-
-/*
- * General setup
- */
-static uint8_t vfio_std_cap_max_size(PCIDevice *pdev, uint8_t pos)
-{
- uint8_t tmp;
- uint16_t next = PCI_CONFIG_SPACE_SIZE;
-
- for (tmp = pdev->config[PCI_CAPABILITY_LIST]; tmp;
- tmp = pdev->config[tmp + PCI_CAP_LIST_NEXT]) {
- if (tmp > pos && tmp < next) {
- next = tmp;
- }
- }
-
- return next - pos;
-}
-
-static void vfio_set_word_bits(uint8_t *buf, uint16_t val, uint16_t mask)
-{
- pci_set_word(buf, (pci_get_word(buf) & ~mask) | val);
-}
-
-static void vfio_add_emulated_word(VFIOPCIDevice *vdev, int pos,
- uint16_t val, uint16_t mask)
-{
- vfio_set_word_bits(vdev->pdev.config + pos, val, mask);
- vfio_set_word_bits(vdev->pdev.wmask + pos, ~mask, mask);
- vfio_set_word_bits(vdev->emulated_config_bits + pos, mask, mask);
-}
-
-static void vfio_set_long_bits(uint8_t *buf, uint32_t val, uint32_t mask)
-{
- pci_set_long(buf, (pci_get_long(buf) & ~mask) | val);
-}
-
-static void vfio_add_emulated_long(VFIOPCIDevice *vdev, int pos,
- uint32_t val, uint32_t mask)
-{
- vfio_set_long_bits(vdev->pdev.config + pos, val, mask);
- vfio_set_long_bits(vdev->pdev.wmask + pos, ~mask, mask);
- vfio_set_long_bits(vdev->emulated_config_bits + pos, mask, mask);
-}
-
-static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size)
-{
- uint16_t flags;
- uint8_t type;
-
- flags = pci_get_word(vdev->pdev.config + pos + PCI_CAP_FLAGS);
- type = (flags & PCI_EXP_FLAGS_TYPE) >> 4;
-
- if (type != PCI_EXP_TYPE_ENDPOINT &&
- type != PCI_EXP_TYPE_LEG_END &&
- type != PCI_EXP_TYPE_RC_END) {
-
- error_report("vfio: Assignment of PCIe type 0x%x "
- "devices is not currently supported", type);
- return -EINVAL;
- }
-
- if (!pci_bus_is_express(vdev->pdev.bus)) {
- PCIBus *bus = vdev->pdev.bus;
- PCIDevice *bridge;
-
- /*
- * Traditionally PCI device assignment exposes the PCIe capability
- * as-is on non-express buses. The reason being that some drivers
- * simply assume that it's there, for example tg3. However when
- * we're running on a native PCIe machine type, like Q35, we need
- * to hide the PCIe capability. The reason for this is twofold;
- * first Windows guests get a Code 10 error when the PCIe capability
- * is exposed in this configuration. Therefore express devices won't
- * work at all unless they're attached to express buses in the VM.
- * Second, a native PCIe machine introduces the possibility of fine
- * granularity IOMMUs supporting both translation and isolation.
- * Guest code to discover the IOMMU visibility of a device, such as
- * IOMMU grouping code on Linux, is very aware of device types and
- * valid transitions between bus types. An express device on a non-
- * express bus is not a valid combination on bare metal systems.
- *
- * Drivers that require a PCIe capability to make the device
- * functional are simply going to need to have their devices placed
- * on a PCIe bus in the VM.
- */
- while (!pci_bus_is_root(bus)) {
- bridge = pci_bridge_get_device(bus);
- bus = bridge->bus;
- }
-
- if (pci_bus_is_express(bus)) {
- return 0;
- }
-
- } else if (pci_bus_is_root(vdev->pdev.bus)) {
- /*
- * On a Root Complex bus Endpoints become Root Complex Integrated
- * Endpoints, which changes the type and clears the LNK & LNK2 fields.
- */
- if (type == PCI_EXP_TYPE_ENDPOINT) {
- vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
- PCI_EXP_TYPE_RC_END << 4,
- PCI_EXP_FLAGS_TYPE);
-
- /* Link Capabilities, Status, and Control goes away */
- if (size > PCI_EXP_LNKCTL) {
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA, 0, ~0);
-
-#ifndef PCI_EXP_LNKCAP2
-#define PCI_EXP_LNKCAP2 44
-#endif
-#ifndef PCI_EXP_LNKSTA2
-#define PCI_EXP_LNKSTA2 50
-#endif
- /* Link 2 Capabilities, Status, and Control goes away */
- if (size > PCI_EXP_LNKCAP2) {
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP2, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL2, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA2, 0, ~0);
- }
- }
-
- } else if (type == PCI_EXP_TYPE_LEG_END) {
- /*
- * Legacy endpoints don't belong on the root complex. Windows
- * seems to be happier with devices if we skip the capability.
- */
- return 0;
- }
-
- } else {
- /*
- * Convert Root Complex Integrated Endpoints to regular endpoints.
- * These devices don't support LNK/LNK2 capabilities, so make them up.
- */
- if (type == PCI_EXP_TYPE_RC_END) {
- vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
- PCI_EXP_TYPE_ENDPOINT << 4,
- PCI_EXP_FLAGS_TYPE);
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP,
- PCI_EXP_LNK_MLW_1 | PCI_EXP_LNK_LS_25, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
- }
-
- /* Mark the Link Status bits as emulated to allow virtual negotiation */
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA,
- pci_get_word(vdev->pdev.config + pos +
- PCI_EXP_LNKSTA),
- PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);
- }
-
- pos = pci_add_capability(&vdev->pdev, PCI_CAP_ID_EXP, pos, size);
- if (pos >= 0) {
- vdev->pdev.exp.exp_cap = pos;
- }
-
- return pos;
-}
-
-static void vfio_check_pcie_flr(VFIOPCIDevice *vdev, uint8_t pos)
-{
- uint32_t cap = pci_get_long(vdev->pdev.config + pos + PCI_EXP_DEVCAP);
-
- if (cap & PCI_EXP_DEVCAP_FLR) {
- trace_vfio_check_pcie_flr(vdev->vbasedev.name);
- vdev->has_flr = true;
- }
-}
-
-static void vfio_check_pm_reset(VFIOPCIDevice *vdev, uint8_t pos)
-{
- uint16_t csr = pci_get_word(vdev->pdev.config + pos + PCI_PM_CTRL);
-
- if (!(csr & PCI_PM_CTRL_NO_SOFT_RESET)) {
- trace_vfio_check_pm_reset(vdev->vbasedev.name);
- vdev->has_pm_reset = true;
- }
-}
-
-static void vfio_check_af_flr(VFIOPCIDevice *vdev, uint8_t pos)
-{
- uint8_t cap = pci_get_byte(vdev->pdev.config + pos + PCI_AF_CAP);
-
- if ((cap & PCI_AF_CAP_TP) && (cap & PCI_AF_CAP_FLR)) {
- trace_vfio_check_af_flr(vdev->vbasedev.name);
- vdev->has_flr = true;
- }
-}
-
-static int vfio_add_std_cap(VFIOPCIDevice *vdev, uint8_t pos)
-{
- PCIDevice *pdev = &vdev->pdev;
- uint8_t cap_id, next, size;
- int ret;
-
- cap_id = pdev->config[pos];
- next = pdev->config[pos + PCI_CAP_LIST_NEXT];
-
- /*
- * If it becomes important to configure capabilities to their actual
- * size, use this as the default when it's something we don't recognize.
- * Since QEMU doesn't actually handle many of the config accesses,
- * exact size doesn't seem worthwhile.
- */
- size = vfio_std_cap_max_size(pdev, pos);
-
- /*
- * pci_add_capability always inserts the new capability at the head
- * of the chain. Therefore to end up with a chain that matches the
- * physical device, we insert from the end by making this recursive.
- * This is also why we pre-calculate size above as cached config space
- * will be changed as we unwind the stack.
- */
- if (next) {
- ret = vfio_add_std_cap(vdev, next);
- if (ret) {
- return ret;
- }
- } else {
- /* Begin the rebuild, use QEMU emulated list bits */
- pdev->config[PCI_CAPABILITY_LIST] = 0;
- vdev->emulated_config_bits[PCI_CAPABILITY_LIST] = 0xff;
- vdev->emulated_config_bits[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
- }
-
- /* Use emulated next pointer to allow dropping caps */
- pci_set_byte(vdev->emulated_config_bits + pos + PCI_CAP_LIST_NEXT, 0xff);
-
- switch (cap_id) {
- case PCI_CAP_ID_MSI:
- ret = vfio_msi_setup(vdev, pos);
- break;
- case PCI_CAP_ID_EXP:
- vfio_check_pcie_flr(vdev, pos);
- ret = vfio_setup_pcie_cap(vdev, pos, size);
- break;
- case PCI_CAP_ID_MSIX:
- ret = vfio_msix_setup(vdev, pos);
- break;
- case PCI_CAP_ID_PM:
- vfio_check_pm_reset(vdev, pos);
- vdev->pm_cap = pos;
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- case PCI_CAP_ID_AF:
- vfio_check_af_flr(vdev, pos);
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- default:
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- }
-
- if (ret < 0) {
- error_report("vfio: %s Error adding PCI capability "
- "0x%x[0x%x]@0x%x: %d", vdev->vbasedev.name,
- cap_id, size, pos, ret);
- return ret;
- }
-
- return 0;
-}
-
-static int vfio_add_capabilities(VFIOPCIDevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
-
- if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST) ||
- !pdev->config[PCI_CAPABILITY_LIST]) {
- return 0; /* Nothing to add */
- }
-
- return vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
-}
-
-static void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
- uint16_t cmd;
-
- vfio_disable_interrupts(vdev);
-
- /* Make sure the device is in D0 */
- if (vdev->pm_cap) {
- uint16_t pmcsr;
- uint8_t state;
-
- pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
- state = pmcsr & PCI_PM_CTRL_STATE_MASK;
- if (state) {
- pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
- vfio_pci_write_config(pdev, vdev->pm_cap + PCI_PM_CTRL, pmcsr, 2);
- /* vfio handles the necessary delay here */
- pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
- state = pmcsr & PCI_PM_CTRL_STATE_MASK;
- if (state) {
- error_report("vfio: Unable to power on device, stuck in D%d",
- state);
- }
- }
- }
-
- /*
- * Stop any ongoing DMA by disconecting I/O, MMIO, and bus master.
- * Also put INTx Disable in known state.
- */
- cmd = vfio_pci_read_config(pdev, PCI_COMMAND, 2);
- cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
- PCI_COMMAND_INTX_DISABLE);
- vfio_pci_write_config(pdev, PCI_COMMAND, cmd, 2);
-}
-
-static void vfio_pci_post_reset(VFIOPCIDevice *vdev)
-{
- vfio_intx_enable(vdev);
-}
-
-static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name)
-{
- char tmp[13];
-
- sprintf(tmp, "%04x:%02x:%02x.%1x", addr->domain,
- addr->bus, addr->slot, addr->function);
-
- return (strcmp(tmp, name) == 0);
-}
-
-static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
-{
- VFIOGroup *group;
- struct vfio_pci_hot_reset_info *info;
- struct vfio_pci_dependent_device *devices;
- struct vfio_pci_hot_reset *reset;
- int32_t *fds;
- int ret, i, count;
- bool multi = false;
-
- trace_vfio_pci_hot_reset(vdev->vbasedev.name, single ? "one" : "multi");
-
- vfio_pci_pre_reset(vdev);
- vdev->vbasedev.needs_reset = false;
-
- info = g_malloc0(sizeof(*info));
- info->argsz = sizeof(*info);
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
- if (ret && errno != ENOSPC) {
- ret = -errno;
- if (!vdev->has_pm_reset) {
- error_report("vfio: Cannot reset device %s, "
- "no available reset mechanism.", vdev->vbasedev.name);
- }
- goto out_single;
- }
-
- count = info->count;
- info = g_realloc(info, sizeof(*info) + (count * sizeof(*devices)));
- info->argsz = sizeof(*info) + (count * sizeof(*devices));
- devices = &info->devices[0];
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
- if (ret) {
- ret = -errno;
- error_report("vfio: hot reset info failed: %m");
- goto out_single;
- }
-
- trace_vfio_pci_hot_reset_has_dep_devices(vdev->vbasedev.name);
-
- /* Verify that we have all the groups required */
- for (i = 0; i < info->count; i++) {
- PCIHostDeviceAddress host;
- VFIOPCIDevice *tmp;
- VFIODevice *vbasedev_iter;
-
- host.domain = devices[i].segment;
- host.bus = devices[i].bus;
- host.slot = PCI_SLOT(devices[i].devfn);
- host.function = PCI_FUNC(devices[i].devfn);
-
- trace_vfio_pci_hot_reset_dep_devices(host.domain,
- host.bus, host.slot, host.function, devices[i].group_id);
-
- if (vfio_pci_host_match(&host, vdev->vbasedev.name)) {
- continue;
- }
-
- QLIST_FOREACH(group, &vfio_group_list, next) {
- if (group->groupid == devices[i].group_id) {
- break;
- }
- }
-
- if (!group) {
- if (!vdev->has_pm_reset) {
- error_report("vfio: Cannot reset device %s, "
- "depends on group %d which is not owned.",
- vdev->vbasedev.name, devices[i].group_id);
- }
- ret = -EPERM;
- goto out;
- }
-
- /* Prep dependent devices for reset and clear our marker. */
- QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
- if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
- continue;
- }
- tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
- if (vfio_pci_host_match(&host, tmp->vbasedev.name)) {
- if (single) {
- ret = -EINVAL;
- goto out_single;
- }
- vfio_pci_pre_reset(tmp);
- tmp->vbasedev.needs_reset = false;
- multi = true;
- break;
- }
- }
- }
-
- if (!single && !multi) {
- ret = -EINVAL;
- goto out_single;
- }
-
- /* Determine how many group fds need to be passed */
- count = 0;
- QLIST_FOREACH(group, &vfio_group_list, next) {
- for (i = 0; i < info->count; i++) {
- if (group->groupid == devices[i].group_id) {
- count++;
- break;
- }
- }
- }
-
- reset = g_malloc0(sizeof(*reset) + (count * sizeof(*fds)));
- reset->argsz = sizeof(*reset) + (count * sizeof(*fds));
- fds = &reset->group_fds[0];
-
- /* Fill in group fds */
- QLIST_FOREACH(group, &vfio_group_list, next) {
- for (i = 0; i < info->count; i++) {
- if (group->groupid == devices[i].group_id) {
- fds[reset->count++] = group->fd;
- break;
- }
- }
- }
-
- /* Bus reset! */
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_PCI_HOT_RESET, reset);
- g_free(reset);
-
- trace_vfio_pci_hot_reset_result(vdev->vbasedev.name,
- ret ? "%m" : "Success");
-
-out:
- /* Re-enable INTx on affected devices */
- for (i = 0; i < info->count; i++) {
- PCIHostDeviceAddress host;
- VFIOPCIDevice *tmp;
- VFIODevice *vbasedev_iter;
-
- host.domain = devices[i].segment;
- host.bus = devices[i].bus;
- host.slot = PCI_SLOT(devices[i].devfn);
- host.function = PCI_FUNC(devices[i].devfn);
-
- if (vfio_pci_host_match(&host, vdev->vbasedev.name)) {
- continue;
- }
-
- QLIST_FOREACH(group, &vfio_group_list, next) {
- if (group->groupid == devices[i].group_id) {
- break;
- }
- }
-
- if (!group) {
- break;
- }
-
- QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
- if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
- continue;
- }
- tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
- if (vfio_pci_host_match(&host, tmp->vbasedev.name)) {
- vfio_pci_post_reset(tmp);
- break;
- }
- }
- }
-out_single:
- vfio_pci_post_reset(vdev);
- g_free(info);
-
- return ret;
-}
-
-/*
- * We want to differentiate hot reset of mulitple in-use devices vs hot reset
- * of a single in-use device. VFIO_DEVICE_RESET will already handle the case
- * of doing hot resets when there is only a single device per bus. The in-use
- * here refers to how many VFIODevices are affected. A hot reset that affects
- * multiple devices, but only a single in-use device, means that we can call
- * it from our bus ->reset() callback since the extent is effectively a single
- * device. This allows us to make use of it in the hotplug path. When there
- * are multiple in-use devices, we can only trigger the hot reset during a
- * system reset and thus from our reset handler. We separate _one vs _multi
- * here so that we don't overlap and do a double reset on the system reset
- * path where both our reset handler and ->reset() callback are used. Calling
- * _one() will only do a hot reset for the one in-use devices case, calling
- * _multi() will do nothing if a _one() would have been sufficient.
- */
-static int vfio_pci_hot_reset_one(VFIOPCIDevice *vdev)
-{
- return vfio_pci_hot_reset(vdev, true);
-}
-
-static int vfio_pci_hot_reset_multi(VFIODevice *vbasedev)
-{
- VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
- return vfio_pci_hot_reset(vdev, false);
-}
-
-static void vfio_pci_compute_needs_reset(VFIODevice *vbasedev)
-{
- VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
- if (!vbasedev->reset_works || (!vdev->has_flr && vdev->has_pm_reset)) {
- vbasedev->needs_reset = true;
- }
-}
-
-static VFIODeviceOps vfio_pci_ops = {
- .vfio_compute_needs_reset = vfio_pci_compute_needs_reset,
- .vfio_hot_reset_multi = vfio_pci_hot_reset_multi,
- .vfio_eoi = vfio_intx_eoi,
-};
-
-int vfio_populate_vga(VFIOPCIDevice *vdev)
-{
- VFIODevice *vbasedev = &vdev->vbasedev;
- struct vfio_region_info *reg_info;
- int ret;
-
- if (vbasedev->num_regions > VFIO_PCI_VGA_REGION_INDEX) {
- ret = vfio_get_region_info(vbasedev,
- VFIO_PCI_VGA_REGION_INDEX, &reg_info);
- if (ret) {
- return ret;
- }
-
- if (!(reg_info->flags & VFIO_REGION_INFO_FLAG_READ) ||
- !(reg_info->flags & VFIO_REGION_INFO_FLAG_WRITE) ||
- reg_info->size < 0xbffff + 1) {
- error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx",
- (unsigned long)reg_info->flags,
- (unsigned long)reg_info->size);
- g_free(reg_info);
- return -EINVAL;
- }
-
- vdev->vga = g_new0(VFIOVGA, 1);
-
- vdev->vga->fd_offset = reg_info->offset;
- vdev->vga->fd = vdev->vbasedev.fd;
-
- g_free(reg_info);
-
- vdev->vga->region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE;
- vdev->vga->region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM;
- QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_MEM].quirks);
-
- vdev->vga->region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE;
- vdev->vga->region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO;
- QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_IO_LO].quirks);
-
- vdev->vga->region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE;
- vdev->vga->region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI;
- QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].quirks);
- }
-
- return 0;
-}
-
-static int vfio_populate_device(VFIOPCIDevice *vdev)
-{
- VFIODevice *vbasedev = &vdev->vbasedev;
- struct vfio_region_info *reg_info;
- struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) };
- int i, ret = -1;
-
- /* Sanity check device */
- if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) {
- error_report("vfio: Um, this isn't a PCI device");
- goto error;
- }
-
- if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) {
- error_report("vfio: unexpected number of io regions %u",
- vbasedev->num_regions);
- goto error;
- }
-
- if (vbasedev->num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) {
- error_report("vfio: unexpected number of irqs %u", vbasedev->num_irqs);
- goto error;
- }
-
- for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
- char *name = g_strdup_printf("%s BAR %d", vbasedev->name, i);
-
- ret = vfio_region_setup(OBJECT(vdev), vbasedev,
- &vdev->bars[i].region, i, name);
- g_free(name);
-
- if (ret) {
- error_report("vfio: Error getting region %d info: %m", i);
- goto error;
- }
-
- QLIST_INIT(&vdev->bars[i].quirks);
- }
-
- ret = vfio_get_region_info(vbasedev,
- VFIO_PCI_CONFIG_REGION_INDEX, &reg_info);
- if (ret) {
- error_report("vfio: Error getting config info: %m");
- goto error;
- }
-
- trace_vfio_populate_device_config(vdev->vbasedev.name,
- (unsigned long)reg_info->size,
- (unsigned long)reg_info->offset,
- (unsigned long)reg_info->flags);
-
- vdev->config_size = reg_info->size;
- if (vdev->config_size == PCI_CONFIG_SPACE_SIZE) {
- vdev->pdev.cap_present &= ~QEMU_PCI_CAP_EXPRESS;
- }
- vdev->config_offset = reg_info->offset;
-
- g_free(reg_info);
-
- if (vdev->features & VFIO_FEATURE_ENABLE_VGA) {
- ret = vfio_populate_vga(vdev);
- if (ret) {
- error_report(
- "vfio: Device does not support requested feature x-vga");
- goto error;
- }
- }
-
- irq_info.index = VFIO_PCI_ERR_IRQ_INDEX;
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info);
- if (ret) {
- /* This can fail for an old kernel or legacy PCI dev */
- trace_vfio_populate_device_get_irq_info_failure();
- ret = 0;
- } else if (irq_info.count == 1) {
- vdev->pci_aer = true;
- } else {
- error_report("vfio: %s "
- "Could not enable error recovery for the device",
- vbasedev->name);
- }
-
-error:
- return ret;
-}
-
-static void vfio_put_device(VFIOPCIDevice *vdev)
-{
- g_free(vdev->vbasedev.name);
- g_free(vdev->msix);
-
- vfio_put_base_device(&vdev->vbasedev);
-}
-
-static void vfio_err_notifier_handler(void *opaque)
-{
- VFIOPCIDevice *vdev = opaque;
-
- if (!event_notifier_test_and_clear(&vdev->err_notifier)) {
- return;
- }
-
- /*
- * TBD. Retrieve the error details and decide what action
- * needs to be taken. One of the actions could be to pass
- * the error to the guest and have the guest driver recover
- * from the error. This requires that PCIe capabilities be
- * exposed to the guest. For now, we just terminate the
- * guest to contain the error.
- */
-
- error_report("%s(%s) Unrecoverable error detected. Please collect any data possible and then kill the guest", __func__, vdev->vbasedev.name);
-
- vm_stop(RUN_STATE_INTERNAL_ERROR);
-}
-
-/*
- * Registers error notifier for devices supporting error recovery.
- * If we encounter a failure in this function, we report an error
- * and continue after disabling error recovery support for the
- * device.
- */
-static void vfio_register_err_notifier(VFIOPCIDevice *vdev)
-{
- int ret;
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!vdev->pci_aer) {
- return;
- }
-
- if (event_notifier_init(&vdev->err_notifier, 0)) {
- error_report("vfio: Unable to init event notifier for error detection");
- vdev->pci_aer = false;
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vdev->err_notifier);
- qemu_set_fd_handler(*pfd, vfio_err_notifier_handler, NULL, vdev);
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- if (ret) {
- error_report("vfio: Failed to set up error notification");
- qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->err_notifier);
- vdev->pci_aer = false;
- }
- g_free(irq_set);
-}
-
-static void vfio_unregister_err_notifier(VFIOPCIDevice *vdev)
-{
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
- int ret;
-
- if (!vdev->pci_aer) {
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
- *pfd = -1;
-
- ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
- if (ret) {
- error_report("vfio: Failed to de-assign error fd: %m");
- }
- g_free(irq_set);
- qemu_set_fd_handler(event_notifier_get_fd(&vdev->err_notifier),
- NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->err_notifier);
-}
-
-static void vfio_req_notifier_handler(void *opaque)
-{
- VFIOPCIDevice *vdev = opaque;
-
- if (!event_notifier_test_and_clear(&vdev->req_notifier)) {
- return;
- }
-
- qdev_unplug(&vdev->pdev.qdev, NULL);
-}
-
-static void vfio_register_req_notifier(VFIOPCIDevice *vdev)
-{
- struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info),
- .index = VFIO_PCI_REQ_IRQ_INDEX };
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!(vdev->features & VFIO_FEATURE_ENABLE_REQ)) {
- return;
- }
-
- if (ioctl(vdev->vbasedev.fd,
- VFIO_DEVICE_GET_IRQ_INFO, &irq_info) < 0 || irq_info.count < 1) {
- return;
- }
-
- if (event_notifier_init(&vdev->req_notifier, 0)) {
- error_report("vfio: Unable to init event notifier for device request");
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_REQ_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vdev->req_notifier);
- qemu_set_fd_handler(*pfd, vfio_req_notifier_handler, NULL, vdev);
-
- if (ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set)) {
- error_report("vfio: Failed to set up device request notification");
- qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->req_notifier);
- } else {
- vdev->req_enabled = true;
- }
-
- g_free(irq_set);
-}
-
-static void vfio_unregister_req_notifier(VFIOPCIDevice *vdev)
-{
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!vdev->req_enabled) {
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_REQ_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
- *pfd = -1;
-
- if (ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set)) {
- error_report("vfio: Failed to de-assign device request fd: %m");
- }
- g_free(irq_set);
- qemu_set_fd_handler(event_notifier_get_fd(&vdev->req_notifier),
- NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->req_notifier);
-
- vdev->req_enabled = false;
-}
-
-static int vfio_initfn(PCIDevice *pdev)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
- VFIODevice *vbasedev_iter;
- VFIOGroup *group;
- char *tmp, group_path[PATH_MAX], *group_name;
- ssize_t len;
- struct stat st;
- int groupid;
- int ret;
-
- if (!vdev->vbasedev.sysfsdev) {
- vdev->vbasedev.sysfsdev =
- g_strdup_printf("/sys/bus/pci/devices/%04x:%02x:%02x.%01x",
- vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
- }
-
- if (stat(vdev->vbasedev.sysfsdev, &st) < 0) {
- error_report("vfio: error: no such host device: %s",
- vdev->vbasedev.sysfsdev);
- return -errno;
- }
-
- vdev->vbasedev.name = g_strdup(basename(vdev->vbasedev.sysfsdev));
- vdev->vbasedev.ops = &vfio_pci_ops;
- vdev->vbasedev.type = VFIO_DEVICE_TYPE_PCI;
-
- tmp = g_strdup_printf("%s/iommu_group", vdev->vbasedev.sysfsdev);
- len = readlink(tmp, group_path, sizeof(group_path));
- g_free(tmp);
-
- if (len <= 0 || len >= sizeof(group_path)) {
- error_report("vfio: error no iommu_group for device");
- return len < 0 ? -errno : -ENAMETOOLONG;
- }
-
- group_path[len] = 0;
-
- group_name = basename(group_path);
- if (sscanf(group_name, "%d", &groupid) != 1) {
- error_report("vfio: error reading %s: %m", group_path);
- return -errno;
- }
-
- trace_vfio_initfn(vdev->vbasedev.name, groupid);
-
- group = vfio_get_group(groupid, pci_device_iommu_address_space(pdev));
- if (!group) {
- error_report("vfio: failed to get group %d", groupid);
- return -ENOENT;
- }
-
- QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
- if (strcmp(vbasedev_iter->name, vdev->vbasedev.name) == 0) {
- error_report("vfio: error: device %s is already attached",
- vdev->vbasedev.name);
- vfio_put_group(group);
- return -EBUSY;
- }
- }
-
- ret = vfio_get_device(group, vdev->vbasedev.name, &vdev->vbasedev);
- if (ret) {
- error_report("vfio: failed to get device %s", vdev->vbasedev.name);
- vfio_put_group(group);
- return ret;
- }
-
- ret = vfio_populate_device(vdev);
- if (ret) {
- return ret;
- }
-
- /* Get a copy of config space */
- ret = pread(vdev->vbasedev.fd, vdev->pdev.config,
- MIN(pci_config_size(&vdev->pdev), vdev->config_size),
- vdev->config_offset);
- if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
- ret = ret < 0 ? -errno : -EFAULT;
- error_report("vfio: Failed to read device config space");
- return ret;
- }
-
- /* vfio emulates a lot for us, but some bits need extra love */
- vdev->emulated_config_bits = g_malloc0(vdev->config_size);
-
- /* QEMU can choose to expose the ROM or not */
- memset(vdev->emulated_config_bits + PCI_ROM_ADDRESS, 0xff, 4);
-
- /*
- * The PCI spec reserves vendor ID 0xffff as an invalid value. The
- * device ID is managed by the vendor and need only be a 16-bit value.
- * Allow any 16-bit value for subsystem so they can be hidden or changed.
- */
- if (vdev->vendor_id != PCI_ANY_ID) {
- if (vdev->vendor_id >= 0xffff) {
- error_report("vfio: Invalid PCI vendor ID provided");
- return -EINVAL;
- }
- vfio_add_emulated_word(vdev, PCI_VENDOR_ID, vdev->vendor_id, ~0);
- trace_vfio_pci_emulated_vendor_id(vdev->vbasedev.name, vdev->vendor_id);
- } else {
- vdev->vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
- }
-
- if (vdev->device_id != PCI_ANY_ID) {
- if (vdev->device_id > 0xffff) {
- error_report("vfio: Invalid PCI device ID provided");
- return -EINVAL;
- }
- vfio_add_emulated_word(vdev, PCI_DEVICE_ID, vdev->device_id, ~0);
- trace_vfio_pci_emulated_device_id(vdev->vbasedev.name, vdev->device_id);
- } else {
- vdev->device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
- }
-
- if (vdev->sub_vendor_id != PCI_ANY_ID) {
- if (vdev->sub_vendor_id > 0xffff) {
- error_report("vfio: Invalid PCI subsystem vendor ID provided");
- return -EINVAL;
- }
- vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_VENDOR_ID,
- vdev->sub_vendor_id, ~0);
- trace_vfio_pci_emulated_sub_vendor_id(vdev->vbasedev.name,
- vdev->sub_vendor_id);
- }
-
- if (vdev->sub_device_id != PCI_ANY_ID) {
- if (vdev->sub_device_id > 0xffff) {
- error_report("vfio: Invalid PCI subsystem device ID provided");
- return -EINVAL;
- }
- vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_ID, vdev->sub_device_id, ~0);
- trace_vfio_pci_emulated_sub_device_id(vdev->vbasedev.name,
- vdev->sub_device_id);
- }
-
- /* QEMU can change multi-function devices to single function, or reverse */
- vdev->emulated_config_bits[PCI_HEADER_TYPE] =
- PCI_HEADER_TYPE_MULTI_FUNCTION;
-
- /* Restore or clear multifunction, this is always controlled by QEMU */
- if (vdev->pdev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
- vdev->pdev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
- } else {
- vdev->pdev.config[PCI_HEADER_TYPE] &= ~PCI_HEADER_TYPE_MULTI_FUNCTION;
- }
-
- /*
- * Clear host resource mapping info. If we choose not to register a
- * BAR, such as might be the case with the option ROM, we can get
- * confusing, unwritable, residual addresses from the host here.
- */
- memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
- memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);
-
- vfio_pci_size_rom(vdev);
-
- ret = vfio_msix_early_setup(vdev);
- if (ret) {
- return ret;
- }
-
- vfio_bars_setup(vdev);
-
- ret = vfio_add_capabilities(vdev);
- if (ret) {
- goto out_teardown;
- }
-
- /* QEMU emulates all of MSI & MSIX */
- if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
- memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
- MSIX_CAP_LENGTH);
- }
-
- if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
- memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
- vdev->msi_cap_size);
- }
-
- if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
- vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
- vfio_intx_mmap_enable, vdev);
- pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_intx_update);
- ret = vfio_intx_enable(vdev);
- if (ret) {
- goto out_teardown;
- }
- }
-
- vfio_register_err_notifier(vdev);
- vfio_register_req_notifier(vdev);
- vfio_setup_resetfn_quirk(vdev);
-
- return 0;
-
-out_teardown:
- pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
- vfio_teardown_msi(vdev);
- vfio_bars_exit(vdev);
- return ret;
-}
-
-static void vfio_instance_finalize(Object *obj)
-{
- PCIDevice *pci_dev = PCI_DEVICE(obj);
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pci_dev);
- VFIOGroup *group = vdev->vbasedev.group;
-
- vfio_bars_finalize(vdev);
- g_free(vdev->emulated_config_bits);
- g_free(vdev->rom);
- vfio_put_device(vdev);
- vfio_put_group(group);
-}
-
-static void vfio_exitfn(PCIDevice *pdev)
-{
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
-
- vfio_unregister_req_notifier(vdev);
- vfio_unregister_err_notifier(vdev);
- pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
- vfio_disable_interrupts(vdev);
- if (vdev->intx.mmap_timer) {
- timer_free(vdev->intx.mmap_timer);
- }
- vfio_teardown_msi(vdev);
- vfio_bars_exit(vdev);
-}
-
-static void vfio_pci_reset(DeviceState *dev)
-{
- PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, dev);
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
-
- trace_vfio_pci_reset(vdev->vbasedev.name);
-
- vfio_pci_pre_reset(vdev);
-
- if (vdev->resetfn && !vdev->resetfn(vdev)) {
- goto post_reset;
- }
-
- if (vdev->vbasedev.reset_works &&
- (vdev->has_flr || !vdev->has_pm_reset) &&
- !ioctl(vdev->vbasedev.fd, VFIO_DEVICE_RESET)) {
- trace_vfio_pci_reset_flr(vdev->vbasedev.name);
- goto post_reset;
- }
-
- /* See if we can do our own bus reset */
- if (!vfio_pci_hot_reset_one(vdev)) {
- goto post_reset;
- }
-
- /* If nothing else works and the device supports PM reset, use it */
- if (vdev->vbasedev.reset_works && vdev->has_pm_reset &&
- !ioctl(vdev->vbasedev.fd, VFIO_DEVICE_RESET)) {
- trace_vfio_pci_reset_pm(vdev->vbasedev.name);
- goto post_reset;
- }
-
-post_reset:
- vfio_pci_post_reset(vdev);
-}
-
-static void vfio_instance_init(Object *obj)
-{
- PCIDevice *pci_dev = PCI_DEVICE(obj);
- VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, PCI_DEVICE(obj));
-
- device_add_bootindex_property(obj, &vdev->bootindex,
- "bootindex", NULL,
- &pci_dev->qdev, NULL);
-}
-
-static Property vfio_pci_dev_properties[] = {
- DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIOPCIDevice, host),
- DEFINE_PROP_STRING("sysfsdev", VFIOPCIDevice, vbasedev.sysfsdev),
- DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIOPCIDevice,
- intx.mmap_timeout, 1100),
- DEFINE_PROP_BIT("x-vga", VFIOPCIDevice, features,
- VFIO_FEATURE_ENABLE_VGA_BIT, false),
- DEFINE_PROP_BIT("x-req", VFIOPCIDevice, features,
- VFIO_FEATURE_ENABLE_REQ_BIT, true),
- DEFINE_PROP_BOOL("x-no-mmap", VFIOPCIDevice, vbasedev.no_mmap, false),
- DEFINE_PROP_BOOL("x-no-kvm-intx", VFIOPCIDevice, no_kvm_intx, false),
- DEFINE_PROP_BOOL("x-no-kvm-msi", VFIOPCIDevice, no_kvm_msi, false),
- DEFINE_PROP_BOOL("x-no-kvm-msix", VFIOPCIDevice, no_kvm_msix, false),
- DEFINE_PROP_UINT32("x-pci-vendor-id", VFIOPCIDevice, vendor_id, PCI_ANY_ID),
- DEFINE_PROP_UINT32("x-pci-device-id", VFIOPCIDevice, device_id, PCI_ANY_ID),
- DEFINE_PROP_UINT32("x-pci-sub-vendor-id", VFIOPCIDevice,
- sub_vendor_id, PCI_ANY_ID),
- DEFINE_PROP_UINT32("x-pci-sub-device-id", VFIOPCIDevice,
- sub_device_id, PCI_ANY_ID),
- /*
- * TODO - support passed fds... is this necessary?
- * DEFINE_PROP_STRING("vfiofd", VFIOPCIDevice, vfiofd_name),
- * DEFINE_PROP_STRING("vfiogroupfd, VFIOPCIDevice, vfiogroupfd_name),
- */
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static const VMStateDescription vfio_pci_vmstate = {
- .name = "vfio-pci",
- .unmigratable = 1,
-};
-
-static void vfio_pci_dev_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
-
- dc->reset = vfio_pci_reset;
- dc->props = vfio_pci_dev_properties;
- dc->vmsd = &vfio_pci_vmstate;
- dc->desc = "VFIO-based PCI device assignment";
- set_bit(DEVICE_CATEGORY_MISC, dc->categories);
- pdc->init = vfio_initfn;
- pdc->exit = vfio_exitfn;
- pdc->config_read = vfio_pci_read_config;
- pdc->config_write = vfio_pci_write_config;
- pdc->is_express = 1; /* We might be */
-}
-
-static const TypeInfo vfio_pci_dev_info = {
- .name = "vfio-pci",
- .parent = TYPE_PCI_DEVICE,
- .instance_size = sizeof(VFIOPCIDevice),
- .class_init = vfio_pci_dev_class_init,
- .instance_init = vfio_instance_init,
- .instance_finalize = vfio_instance_finalize,
-};
-
-static void register_vfio_pci_dev_type(void)
-{
- type_register_static(&vfio_pci_dev_info);
-}
-
-type_init(register_vfio_pci_dev_type)