diff options
Diffstat (limited to 'hw/virtio-pci.c')
| -rw-r--r-- | hw/virtio-pci.c | 493 |
1 files changed, 421 insertions, 72 deletions
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index 71f4fb5..a869f53 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -22,16 +22,16 @@ #include "virtio-net.h" #include "virtio-serial.h" #include "virtio-scsi.h" -#include "pci.h" -#include "qemu-error.h" -#include "msi.h" -#include "msix.h" -#include "net.h" +#include "pci/pci.h" +#include "qemu/error-report.h" +#include "pci/msi.h" +#include "pci/msix.h" #include "loader.h" -#include "kvm.h" -#include "blockdev.h" +#include "sysemu/kvm.h" +#include "sysemu/blockdev.h" #include "virtio-pci.h" -#include "range.h" +#include "qemu/range.h" +#include "virtio-bus.h" /* from Linux's linux/virtio_pci.h */ @@ -97,35 +97,48 @@ bool virtio_is_big_endian(void); /* virtio device */ +/* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */ +static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d) +{ + return container_of(d, VirtIOPCIProxy, pci_dev.qdev); +} -static void virtio_pci_notify(void *opaque, uint16_t vector) +/* DeviceState to VirtIOPCIProxy. Note: used on datapath, + * be careful and test performance if you change this. + */ +static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d) { - VirtIOPCIProxy *proxy = opaque; + return container_of(d, VirtIOPCIProxy, pci_dev.qdev); +} + +static void virtio_pci_notify(DeviceState *d, uint16_t vector) +{ + VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d); if (msix_enabled(&proxy->pci_dev)) msix_notify(&proxy->pci_dev, vector); else qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1); } -static void virtio_pci_save_config(void * opaque, QEMUFile *f) +static void virtio_pci_save_config(DeviceState *d, QEMUFile *f) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); pci_device_save(&proxy->pci_dev, f); msix_save(&proxy->pci_dev, f); if (msix_present(&proxy->pci_dev)) qemu_put_be16(f, proxy->vdev->config_vector); } -static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f) +static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); if (msix_present(&proxy->pci_dev)) qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n)); } -static int virtio_pci_load_config(void * opaque, QEMUFile *f) +static int virtio_pci_load_config(DeviceState *d, QEMUFile *f) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); int ret; ret = pci_device_load(&proxy->pci_dev, f); if (ret) { @@ -144,9 +157,9 @@ static int virtio_pci_load_config(void * opaque, QEMUFile *f) return 0; } -static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f) +static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); uint16_t vector; if (msix_present(&proxy->pci_dev)) { qemu_get_be16s(f, &vector); @@ -244,7 +257,7 @@ static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) void virtio_pci_reset(DeviceState *d) { - VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev); + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); virtio_pci_stop_ioeventfd(proxy); virtio_reset(proxy->vdev); msix_unuse_all_vectors(&proxy->pci_dev); @@ -464,9 +477,9 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, } } -static unsigned virtio_pci_get_features(void *opaque) +static unsigned virtio_pci_get_features(DeviceState *d) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); return proxy->host_features; } @@ -475,8 +488,6 @@ static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, unsigned int vector, MSIMessage msg) { - VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); - EventNotifier *n = virtio_queue_get_guest_notifier(vq); VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; int ret; @@ -488,23 +499,34 @@ static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, irqfd->virq = ret; } irqfd->users++; - - ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq); - if (ret < 0) { - if (--irqfd->users == 0) { - kvm_irqchip_release_virq(kvm_state, irqfd->virq); - } - return ret; - } - - virtio_queue_set_guest_notifier_fd_handler(vq, true, true); return 0; } static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, - unsigned int queue_no, unsigned int vector) { + VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; + if (--irqfd->users == 0) { + kvm_irqchip_release_virq(kvm_state, irqfd->virq); + } +} + +static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, + unsigned int queue_no, + unsigned int vector) +{ + VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; + VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); + EventNotifier *n = virtio_queue_get_guest_notifier(vq); + int ret; + ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq); + return ret; +} + +static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, + unsigned int queue_no, + unsigned int vector) +{ VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); EventNotifier *n = virtio_queue_get_guest_notifier(vq); VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; @@ -512,29 +534,143 @@ static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); assert(ret == 0); +} - if (--irqfd->users == 0) { - kvm_irqchip_release_virq(kvm_state, irqfd->virq); +static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) +{ + PCIDevice *dev = &proxy->pci_dev; + VirtIODevice *vdev = proxy->vdev; + unsigned int vector; + int ret, queue_no; + MSIMessage msg; + + for (queue_no = 0; queue_no < nvqs; queue_no++) { + if (!virtio_queue_get_num(vdev, queue_no)) { + break; + } + vector = virtio_queue_vector(vdev, queue_no); + if (vector >= msix_nr_vectors_allocated(dev)) { + continue; + } + msg = msix_get_message(dev, vector); + ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); + if (ret < 0) { + goto undo; + } + /* If guest supports masking, set up irqfd now. + * Otherwise, delay until unmasked in the frontend. + */ + if (proxy->vdev->guest_notifier_mask) { + ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); + if (ret < 0) { + kvm_virtio_pci_vq_vector_release(proxy, vector); + goto undo; + } + } } + return 0; - virtio_queue_set_guest_notifier_fd_handler(vq, true, false); +undo: + while (--queue_no >= 0) { + vector = virtio_queue_vector(vdev, queue_no); + if (vector >= msix_nr_vectors_allocated(dev)) { + continue; + } + if (proxy->vdev->guest_notifier_mask) { + kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); + } + kvm_virtio_pci_vq_vector_release(proxy, vector); + } + return ret; } -static int kvm_virtio_pci_vector_use(PCIDevice *dev, unsigned vector, +static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) +{ + PCIDevice *dev = &proxy->pci_dev; + VirtIODevice *vdev = proxy->vdev; + unsigned int vector; + int queue_no; + + for (queue_no = 0; queue_no < nvqs; queue_no++) { + if (!virtio_queue_get_num(vdev, queue_no)) { + break; + } + vector = virtio_queue_vector(vdev, queue_no); + if (vector >= msix_nr_vectors_allocated(dev)) { + continue; + } + /* If guest supports masking, clean up irqfd now. + * Otherwise, it was cleaned when masked in the frontend. + */ + if (proxy->vdev->guest_notifier_mask) { + kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); + } + kvm_virtio_pci_vq_vector_release(proxy, vector); + } +} + +static int kvm_virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, + unsigned int queue_no, + unsigned int vector, + MSIMessage msg) +{ + VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); + EventNotifier *n = virtio_queue_get_guest_notifier(vq); + VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; + int ret = 0; + + if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) { + ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg); + if (ret < 0) { + return ret; + } + } + + /* If guest supports masking, irqfd is already setup, unmask it. + * Otherwise, set it up now. + */ + if (proxy->vdev->guest_notifier_mask) { + proxy->vdev->guest_notifier_mask(proxy->vdev, queue_no, false); + /* Test after unmasking to avoid losing events. */ + if (proxy->vdev->guest_notifier_pending && + proxy->vdev->guest_notifier_pending(proxy->vdev, queue_no)) { + event_notifier_set(n); + } + } else { + ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); + } + return ret; +} + +static void kvm_virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, + unsigned int queue_no, + unsigned int vector) +{ + /* If guest supports masking, keep irqfd but mask it. + * Otherwise, clean it up now. + */ + if (proxy->vdev->guest_notifier_mask) { + proxy->vdev->guest_notifier_mask(proxy->vdev, queue_no, true); + } else { + kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); + } +} + +static int kvm_virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, MSIMessage msg) { VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); VirtIODevice *vdev = proxy->vdev; int ret, queue_no; - for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { + for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { if (!virtio_queue_get_num(vdev, queue_no)) { break; } if (virtio_queue_vector(vdev, queue_no) != vector) { continue; } - ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); + ret = kvm_virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg); if (ret < 0) { goto undo; } @@ -546,31 +682,64 @@ undo: if (virtio_queue_vector(vdev, queue_no) != vector) { continue; } - kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector); + kvm_virtio_pci_vq_vector_mask(proxy, queue_no, vector); } return ret; } -static void kvm_virtio_pci_vector_release(PCIDevice *dev, unsigned vector) +static void kvm_virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) { VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); VirtIODevice *vdev = proxy->vdev; int queue_no; - for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { + for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { if (!virtio_queue_get_num(vdev, queue_no)) { break; } if (virtio_queue_vector(vdev, queue_no) != vector) { continue; } - kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector); + kvm_virtio_pci_vq_vector_mask(proxy, queue_no, vector); } } -static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign) +static void kvm_virtio_pci_vector_poll(PCIDevice *dev, + unsigned int vector_start, + unsigned int vector_end) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); + VirtIODevice *vdev = proxy->vdev; + int queue_no; + unsigned int vector; + EventNotifier *notifier; + VirtQueue *vq; + + for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { + if (!virtio_queue_get_num(vdev, queue_no)) { + break; + } + vector = virtio_queue_vector(vdev, queue_no); + if (vector < vector_start || vector >= vector_end || + !msix_is_masked(dev, vector)) { + continue; + } + vq = virtio_get_queue(vdev, queue_no); + notifier = virtio_queue_get_guest_notifier(vq); + if (vdev->guest_notifier_pending) { + if (vdev->guest_notifier_pending(vdev, queue_no)) { + msix_set_pending(dev, vector); + } + } else if (event_notifier_test_and_clear(notifier)) { + msix_set_pending(dev, vector); + } + } +} + +static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, + bool with_irqfd) +{ + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtQueue *vq = virtio_get_queue(proxy->vdev, n); EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); @@ -579,72 +748,94 @@ static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign) if (r < 0) { return r; } - virtio_queue_set_guest_notifier_fd_handler(vq, true, false); + virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); } else { - virtio_queue_set_guest_notifier_fd_handler(vq, false, false); + virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); event_notifier_cleanup(notifier); } return 0; } -static bool virtio_pci_query_guest_notifiers(void *opaque) +static bool virtio_pci_query_guest_notifiers(DeviceState *d) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); return msix_enabled(&proxy->pci_dev); } -static int virtio_pci_set_guest_notifiers(void *opaque, bool assign) +static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = proxy->vdev; int r, n; + bool with_irqfd = msix_enabled(&proxy->pci_dev) && + kvm_msi_via_irqfd_enabled(); + + nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX); + + /* When deassigning, pass a consistent nvqs value + * to avoid leaking notifiers. + */ + assert(assign || nvqs == proxy->nvqs_with_notifiers); + + proxy->nvqs_with_notifiers = nvqs; /* Must unset vector notifier while guest notifier is still assigned */ - if (kvm_msi_via_irqfd_enabled() && !assign) { + if (proxy->vector_irqfd && !assign) { msix_unset_vector_notifiers(&proxy->pci_dev); + kvm_virtio_pci_vector_release(proxy, nvqs); g_free(proxy->vector_irqfd); proxy->vector_irqfd = NULL; } - for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { + for (n = 0; n < nvqs; n++) { if (!virtio_queue_get_num(vdev, n)) { break; } - r = virtio_pci_set_guest_notifier(opaque, n, assign); + r = virtio_pci_set_guest_notifier(d, n, assign, + kvm_msi_via_irqfd_enabled()); if (r < 0) { goto assign_error; } } /* Must set vector notifier after guest notifier has been assigned */ - if (kvm_msi_via_irqfd_enabled() && assign) { + if (with_irqfd && assign) { proxy->vector_irqfd = g_malloc0(sizeof(*proxy->vector_irqfd) * msix_nr_vectors_allocated(&proxy->pci_dev)); - r = msix_set_vector_notifiers(&proxy->pci_dev, - kvm_virtio_pci_vector_use, - kvm_virtio_pci_vector_release); + r = kvm_virtio_pci_vector_use(proxy, nvqs); if (r < 0) { goto assign_error; } + r = msix_set_vector_notifiers(&proxy->pci_dev, + kvm_virtio_pci_vector_unmask, + kvm_virtio_pci_vector_mask, + kvm_virtio_pci_vector_poll); + if (r < 0) { + goto notifiers_error; + } } return 0; +notifiers_error: + assert(assign); + kvm_virtio_pci_vector_release(proxy, nvqs); + assign_error: /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ assert(assign); while (--n >= 0) { - virtio_pci_set_guest_notifier(opaque, n, !assign); + virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); } return r; } -static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign) +static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); /* Stop using ioeventfd for virtqueue kick if the device starts using host * notifiers. This makes it easy to avoid stepping on each others' toes. @@ -660,9 +851,9 @@ static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign) return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); } -static void virtio_pci_vmstate_change(void *opaque, bool running) +static void virtio_pci_vmstate_change(DeviceState *d, bool running) { - VirtIOPCIProxy *proxy = opaque; + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); if (running) { /* Try to find out if the guest has bus master disabled, but is @@ -727,7 +918,7 @@ void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev) proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; } - virtio_bind_device(vdev, &virtio_pci_bindings, proxy); + virtio_bind_device(vdev, &virtio_pci_bindings, DEVICE(proxy)); proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE; proxy->host_features = vdev->get_features(vdev, proxy->host_features); @@ -806,7 +997,8 @@ static int virtio_net_init_pci(PCIDevice *pci_dev) VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); VirtIODevice *vdev; - vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net); + vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net, + proxy->host_features); vdev->nvectors = proxy->nvectors; virtio_init_pci(proxy, vdev); @@ -897,6 +1089,9 @@ static Property virtio_blk_properties[] = { #endif DEFINE_PROP_BIT("config-wce", VirtIOPCIProxy, blk.config_wce, 0, true), DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), +#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE + DEFINE_PROP_BIT("x-data-plane", VirtIOPCIProxy, blk.data_plane, 0, false), +#endif DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), DEFINE_PROP_END_OF_LIST(), @@ -917,7 +1112,7 @@ static void virtio_blk_class_init(ObjectClass *klass, void *data) dc->props = virtio_blk_properties; } -static TypeInfo virtio_blk_info = { +static const TypeInfo virtio_blk_info = { .name = "virtio-blk-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), @@ -951,7 +1146,7 @@ static void virtio_net_class_init(ObjectClass *klass, void *data) dc->props = virtio_net_properties; } -static TypeInfo virtio_net_info = { +static const TypeInfo virtio_net_info = { .name = "virtio-net-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), @@ -982,7 +1177,7 @@ static void virtio_serial_class_init(ObjectClass *klass, void *data) dc->props = virtio_serial_properties; } -static TypeInfo virtio_serial_info = { +static const TypeInfo virtio_serial_info = { .name = "virtio-serial-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), @@ -1010,7 +1205,7 @@ static void virtio_balloon_class_init(ObjectClass *klass, void *data) dc->props = virtio_balloon_properties; } -static TypeInfo virtio_balloon_info = { +static const TypeInfo virtio_balloon_info = { .name = "virtio-balloon-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), @@ -1053,7 +1248,7 @@ static void virtio_rng_class_init(ObjectClass *klass, void *data) dc->props = virtio_rng_properties; } -static TypeInfo virtio_rng_info = { +static const TypeInfo virtio_rng_info = { .name = "virtio-rng-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), @@ -1111,13 +1306,165 @@ static void virtio_scsi_class_init(ObjectClass *klass, void *data) dc->props = virtio_scsi_properties; } -static TypeInfo virtio_scsi_info = { +static const TypeInfo virtio_scsi_info = { .name = "virtio-scsi-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), .class_init = virtio_scsi_class_init, }; +/* + * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. + */ + +/* This is called by virtio-bus just after the device is plugged. */ +static void virtio_pci_device_plugged(DeviceState *d) +{ + VirtIOPCIProxy *proxy = VIRTIO_PCI(d); + VirtioBusState *bus = &proxy->bus; + uint8_t *config; + uint32_t size; + + proxy->vdev = bus->vdev; + + config = proxy->pci_dev.config; + if (proxy->class_code) { + pci_config_set_class(config, proxy->class_code); + } + pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, + pci_get_word(config + PCI_VENDOR_ID)); + pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); + config[PCI_INTERRUPT_PIN] = 1; + + if (proxy->nvectors && + msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) { + proxy->nvectors = 0; + } + + proxy->pci_dev.config_write = virtio_write_config; + + size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + + virtio_bus_get_vdev_config_len(bus); + if (size & (size - 1)) { + size = 1 << qemu_fls(size); + } + + memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, + "virtio-pci", size); + pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, + &proxy->bar); + + if (!kvm_has_many_ioeventfds()) { + proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; + } + + proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; + proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE; + proxy->host_features = virtio_bus_get_vdev_features(bus, + proxy->host_features); +} + +/* This is called by virtio-bus just before the device is unplugged. */ +static void virtio_pci_device_unplug(DeviceState *d) +{ + VirtIOPCIProxy *dev = VIRTIO_PCI(d); + virtio_pci_stop_ioeventfd(dev); +} + +static int virtio_pci_init(PCIDevice *pci_dev) +{ + VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev); + VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); + virtio_pci_bus_new(&dev->bus, dev); + if (k->init != NULL) { + return k->init(dev); + } + return 0; +} + +static void virtio_pci_exit(PCIDevice *pci_dev) +{ + VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); + VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); + BusState *qbus = BUS(&proxy->bus); + virtio_bus_destroy_device(bus); + qbus_free(qbus); + virtio_exit_pci(pci_dev); +} + +/* + * This will be renamed virtio_pci_reset at the end of the series. + * virtio_pci_reset is still in use at this moment. + */ +static void virtio_pci_rst(DeviceState *qdev) +{ + VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); + VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); + virtio_pci_stop_ioeventfd(proxy); + virtio_bus_reset(bus); + msix_unuse_all_vectors(&proxy->pci_dev); + proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; +} + +static void virtio_pci_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + k->init = virtio_pci_init; + k->exit = virtio_pci_exit; + k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; + k->revision = VIRTIO_PCI_ABI_VERSION; + k->class_id = PCI_CLASS_OTHERS; + dc->reset = virtio_pci_rst; +} + +static const TypeInfo virtio_pci_info = { + .name = TYPE_VIRTIO_PCI, + .parent = TYPE_PCI_DEVICE, + .instance_size = sizeof(VirtIOPCIProxy), + .class_init = virtio_pci_class_init, + .class_size = sizeof(VirtioPCIClass), + .abstract = true, +}; + +/* virtio-pci-bus */ + +void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev) +{ + DeviceState *qdev = DEVICE(dev); + BusState *qbus; + qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_PCI_BUS, qdev, NULL); + qbus = BUS(bus); + qbus->allow_hotplug = 0; +} + +static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) +{ + BusClass *bus_class = BUS_CLASS(klass); + VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); + bus_class->max_dev = 1; + k->notify = virtio_pci_notify; + k->save_config = virtio_pci_save_config; + k->load_config = virtio_pci_load_config; + k->save_queue = virtio_pci_save_queue; + k->load_queue = virtio_pci_load_queue; + k->get_features = virtio_pci_get_features; + k->query_guest_notifiers = virtio_pci_query_guest_notifiers; + k->set_host_notifier = virtio_pci_set_host_notifier; + k->set_guest_notifiers = virtio_pci_set_guest_notifiers; + k->vmstate_change = virtio_pci_vmstate_change; + k->device_plugged = virtio_pci_device_plugged; + k->device_unplug = virtio_pci_device_unplug; +} + +static const TypeInfo virtio_pci_bus_info = { + .name = TYPE_VIRTIO_PCI_BUS, + .parent = TYPE_VIRTIO_BUS, + .instance_size = sizeof(VirtioPCIBusState), + .class_init = virtio_pci_bus_class_init, +}; + static void virtio_pci_register_types(void) { type_register_static(&virtio_blk_info); @@ -1126,6 +1473,8 @@ static void virtio_pci_register_types(void) type_register_static(&virtio_balloon_info); type_register_static(&virtio_scsi_info); type_register_static(&virtio_rng_info); + type_register_static(&virtio_pci_bus_info); + type_register_static(&virtio_pci_info); } type_init(virtio_pci_register_types) |