diff options
Diffstat (limited to 'hw/vfio_pci.c')
| -rw-r--r-- | hw/vfio_pci.c | 101 |
1 files changed, 58 insertions, 43 deletions
diff --git a/hw/vfio_pci.c b/hw/vfio_pci.c index 2325272c44..85b16bbd23 100644 --- a/hw/vfio_pci.c +++ b/hw/vfio_pci.c @@ -248,24 +248,12 @@ static void vfio_eoi(VFIODevice *vdev) vfio_unmask_intx(vdev); } -typedef struct QEMU_PACKED VFIOIRQSetFD { - struct vfio_irq_set irq_set; - int32_t fd; -} VFIOIRQSetFD; - static int vfio_enable_intx(VFIODevice *vdev) { - VFIOIRQSetFD irq_set_fd = { - .irq_set = { - .argsz = sizeof(irq_set_fd), - .flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER, - .index = VFIO_PCI_INTX_IRQ_INDEX, - .start = 0, - .count = 1, - }, - }; uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1); - int ret; + int ret, argsz; + struct vfio_irq_set *irq_set; + int32_t *pfd; if (!pin) { return 0; @@ -280,12 +268,24 @@ static int vfio_enable_intx(VFIODevice *vdev) return ret; } - irq_set_fd.fd = event_notifier_get_fd(&vdev->intx.interrupt); - qemu_set_fd_handler(irq_set_fd.fd, vfio_intx_interrupt, NULL, vdev); + 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); - if (ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set_fd)) { + ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); + g_free(irq_set); + if (ret) { error_report("vfio: Error: Failed to setup INTx fd: %m\n"); - qemu_set_fd_handler(irq_set_fd.fd, NULL, NULL, vdev); + qemu_set_fd_handler(*pfd, NULL, NULL, vdev); event_notifier_cleanup(&vdev->intx.interrupt); return -errno; } @@ -426,18 +426,25 @@ static int vfio_msix_vector_use(PCIDevice *pdev, error_report("vfio: failed to enable vectors, %d\n", ret); } } else { - VFIOIRQSetFD irq_set_fd = { - .irq_set = { - .argsz = sizeof(irq_set_fd), - .flags = VFIO_IRQ_SET_DATA_EVENTFD | - VFIO_IRQ_SET_ACTION_TRIGGER, - .index = VFIO_PCI_MSIX_IRQ_INDEX, - .start = nr, - .count = 1, - }, - .fd = event_notifier_get_fd(&vector->interrupt), - }; - ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set_fd); + 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); + + ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); + g_free(irq_set); if (ret) { error_report("vfio: failed to modify vector, %d\n", ret); } @@ -450,17 +457,9 @@ static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr) { VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev); VFIOMSIVector *vector = &vdev->msi_vectors[nr]; - VFIOIRQSetFD irq_set_fd = { - .irq_set = { - .argsz = sizeof(irq_set_fd), - .flags = VFIO_IRQ_SET_DATA_EVENTFD | - VFIO_IRQ_SET_ACTION_TRIGGER, - .index = VFIO_PCI_MSIX_IRQ_INDEX, - .start = nr, - .count = 1, - }, - .fd = -1, - }; + int argsz; + struct vfio_irq_set *irq_set; + int32_t *pfd; DPRINTF("%s(%04x:%02x:%02x.%x) vector %d released\n", __func__, vdev->host.domain, vdev->host.bus, vdev->host.slot, @@ -472,7 +471,23 @@ static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr) * bouncing through userspace and let msix.c drop it? Not sure. */ msix_vector_unuse(pdev, nr); - ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set_fd); + + 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 = -1; + + ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set); + + g_free(irq_set); if (vector->virq < 0) { qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt), |