/* * Virtio PCI Bindings * * Copyright IBM, Corp. 2007 * Copyright (c) 2009 CodeSourcery * * Authors: * Anthony Liguori * Paul Brook * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * * Contributions after 2012-01-13 are licensed under the terms of the * GNU GPL, version 2 or (at your option) any later version. */ #include #include "standard-headers/linux/virtio_pci.h" #include "hw/virtio/virtio.h" #include "hw/virtio/virtio-blk.h" #include "hw/virtio/virtio-net.h" #include "hw/virtio/virtio-serial.h" #include "hw/virtio/virtio-scsi.h" #include "hw/virtio/virtio-balloon.h" #include "hw/pci/pci.h" #include "qemu/error-report.h" #include "hw/pci/msi.h" #include "hw/pci/msix.h" #include "hw/loader.h" #include "sysemu/kvm.h" #include "sysemu/block-backend.h" #include "virtio-pci.h" #include "qemu/range.h" #include "hw/virtio/virtio-bus.h" #include "qapi/visitor.h" #define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev)) #undef VIRTIO_PCI_CONFIG /* The remaining space is defined by each driver as the per-driver * configuration space */ #define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev)) static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, VirtIOPCIProxy *dev); /* 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); } /* 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) { 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 { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); pci_set_irq(&proxy->pci_dev, vdev->isr & 1); } } static void virtio_pci_save_config(DeviceState *d, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); pci_device_save(&proxy->pci_dev, f); msix_save(&proxy->pci_dev, f); if (msix_present(&proxy->pci_dev)) qemu_put_be16(f, vdev->config_vector); } static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); if (msix_present(&proxy->pci_dev)) qemu_put_be16(f, virtio_queue_vector(vdev, n)); } static int virtio_pci_load_config(DeviceState *d, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); int ret; ret = pci_device_load(&proxy->pci_dev, f); if (ret) { return ret; } msix_unuse_all_vectors(&proxy->pci_dev); msix_load(&proxy->pci_dev, f); if (msix_present(&proxy->pci_dev)) { qemu_get_be16s(f, &vdev->config_vector); } else { vdev->config_vector = VIRTIO_NO_VECTOR; } if (vdev->config_vector != VIRTIO_NO_VECTOR) { return msix_vector_use(&proxy->pci_dev, vdev->config_vector); } return 0; } static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); uint16_t vector; if (msix_present(&proxy->pci_dev)) { qemu_get_be16s(f, &vector); } else { vector = VIRTIO_NO_VECTOR; } virtio_queue_set_vector(vdev, n, vector); if (vector != VIRTIO_NO_VECTOR) { return msix_vector_use(&proxy->pci_dev, vector); } return 0; } #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, int n, bool assign, bool set_handler) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_get_queue(vdev, n); EventNotifier *notifier = virtio_queue_get_host_notifier(vq); bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY); bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN); MemoryRegion *modern_mr = &proxy->notify.mr; MemoryRegion *legacy_mr = &proxy->bar; hwaddr modern_addr = QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * virtio_get_queue_index(vq); hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY; int r = 0; if (assign) { r = event_notifier_init(notifier, 1); if (r < 0) { error_report("%s: unable to init event notifier: %d", __func__, r); return r; } virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler); if (modern) { memory_region_add_eventfd(modern_mr, modern_addr, 2, true, n, notifier); } if (legacy) { memory_region_add_eventfd(legacy_mr, legacy_addr, 2, true, n, notifier); } } else { if (modern) { memory_region_del_eventfd(modern_mr, modern_addr, 2, true, n, notifier); } if (legacy) { memory_region_del_eventfd(legacy_mr, legacy_addr, 2, true, n, notifier); } virtio_queue_set_host_notifier_fd_handler(vq, false, false); event_notifier_cleanup(notifier); } return r; } static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); int n, r; if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) || proxy->ioeventfd_disabled || proxy->ioeventfd_started) { return; } for (n = 0; n < VIRTIO_QUEUE_MAX; n++) { if (!virtio_queue_get_num(vdev, n)) { continue; } r = virtio_pci_set_host_notifier_internal(proxy, n, true, true); if (r < 0) { goto assign_error; } } proxy->ioeventfd_started = true; return; assign_error: while (--n >= 0) { if (!virtio_queue_get_num(vdev, n)) { continue; } r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); assert(r >= 0); } proxy->ioeventfd_started = false; error_report("%s: failed. Fallback to a userspace (slower).", __func__); } static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); int r; int n; if (!proxy->ioeventfd_started) { return; } for (n = 0; n < VIRTIO_QUEUE_MAX; n++) { if (!virtio_queue_get_num(vdev, n)) { continue; } r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); assert(r >= 0); } proxy->ioeventfd_started = false; } static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) { VirtIOPCIProxy *proxy = opaque; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); hwaddr pa; switch (addr) { case VIRTIO_PCI_GUEST_FEATURES: /* Guest does not negotiate properly? We have to assume nothing. */ if (val & (1 << VIRTIO_F_BAD_FEATURE)) { val = virtio_bus_get_vdev_bad_features(&proxy->bus); } virtio_set_features(vdev, val); break; case VIRTIO_PCI_QUEUE_PFN: pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; if (pa == 0) { virtio_pci_stop_ioeventfd(proxy); virtio_reset(vdev); msix_unuse_all_vectors(&proxy->pci_dev); } else virtio_queue_set_addr(vdev, vdev->queue_sel, pa); break; case VIRTIO_PCI_QUEUE_SEL: if (val < VIRTIO_QUEUE_MAX) vdev->queue_sel = val; break; case VIRTIO_PCI_QUEUE_NOTIFY: if (val < VIRTIO_QUEUE_MAX) { virtio_queue_notify(vdev, val); } break; case VIRTIO_PCI_STATUS: if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { virtio_pci_stop_ioeventfd(proxy); } virtio_set_status(vdev, val & 0xFF); if (val & VIRTIO_CONFIG_S_DRIVER_OK) { virtio_pci_start_ioeventfd(proxy); } if (vdev->status == 0) { virtio_reset(vdev); msix_unuse_all_vectors(&proxy->pci_dev); } /* Linux before 2.6.34 drives the device without enabling the PCI device bus master bit. Enable it automatically for the guest. This is a PCI spec violation but so is initiating DMA with bus master bit clear. */ if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) { pci_default_write_config(&proxy->pci_dev, PCI_COMMAND, proxy->pci_dev.config[PCI_COMMAND] | PCI_COMMAND_MASTER, 1); } break; case VIRTIO_MSI_CONFIG_VECTOR: msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); /* Make it possible for guest to discover an error took place. */ if (msix_vector_use(&proxy->pci_dev, val) < 0) val = VIRTIO_NO_VECTOR; vdev->config_vector = val; break; case VIRTIO_MSI_QUEUE_VECTOR: msix_vector_unuse(&proxy->pci_dev, virtio_queue_vector(vdev, vdev->queue_sel)); /* Make it possible for guest to discover an error took place. */ if (msix_vector_use(&proxy->pci_dev, val) < 0) val = VIRTIO_NO_VECTOR; virtio_queue_set_vector(vdev, vdev->queue_sel, val); break; default: error_report("%s: unexpected address 0x%x value 0x%x", __func__, addr, val); break; } } static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); uint32_t ret = 0xFFFFFFFF; switch (addr) { case VIRTIO_PCI_HOST_FEATURES: ret = vdev->host_features; break; case VIRTIO_PCI_GUEST_FEATURES: ret = vdev->guest_features; break; case VIRTIO_PCI_QUEUE_PFN: ret = virtio_queue_get_addr(vdev, vdev->queue_sel) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; break; case VIRTIO_PCI_QUEUE_NUM: ret = virtio_queue_get_num(vdev, vdev->queue_sel); break; case VIRTIO_PCI_QUEUE_SEL: ret = vdev->queue_sel; break; case VIRTIO_PCI_STATUS: ret = vdev->status; break; case VIRTIO_PCI_ISR: /* reading from the ISR also clears it. */ ret = vdev->isr; vdev->isr = 0; pci_irq_deassert(&proxy->pci_dev); break; case VIRTIO_MSI_CONFIG_VECTOR: ret = vdev->config_vector; break; case VIRTIO_MSI_QUEUE_VECTOR: ret = virtio_queue_vector(vdev, vdev->queue_sel); break; default: break; } return ret; } static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, unsigned size) { VirtIOPCIProxy *proxy = opaque; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev); uint64_t val = 0; if (addr < config) { return virtio_ioport_read(proxy, addr); } addr -= config; switch (size) { case 1: val = virtio_config_readb(vdev, addr); break; case 2: val = virtio_config_readw(vdev, addr); if (virtio_is_big_endian(vdev)) { val = bswap16(val); } break; case 4: val = virtio_config_readl(vdev, addr); if (virtio_is_big_endian(vdev)) { val = bswap32(val); } break; } return val; } static void virtio_pci_config_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { VirtIOPCIProxy *proxy = opaque; uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); if (addr < config) { virtio_ioport_write(proxy, addr, val); return; } addr -= config; /* * Virtio-PCI is odd. Ioports are LE but config space is target native * endian. */ switch (size) { case 1: virtio_config_writeb(vdev, addr, val); break; case 2: if (virtio_is_big_endian(vdev)) { val = bswap16(val); } virtio_config_writew(vdev, addr, val); break; case 4: if (virtio_is_big_endian(vdev)) { val = bswap32(val); } virtio_config_writel(vdev, addr, val); break; } } static const MemoryRegionOps virtio_pci_config_ops = { .read = virtio_pci_config_read, .write = virtio_pci_config_write, .impl = { .min_access_size = 1, .max_access_size = 4, }, .endianness = DEVICE_LITTLE_ENDIAN, }; static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, uint32_t val, int len) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); pci_default_write_config(pci_dev, address, val, len); if (range_covers_byte(address, len, PCI_COMMAND) && !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { virtio_pci_stop_ioeventfd(proxy); virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); } } static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, unsigned int queue_no, unsigned int vector, MSIMessage msg) { VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; int ret; if (irqfd->users == 0) { ret = kvm_irqchip_add_msi_route(kvm_state, msg); if (ret < 0) { return ret; } irqfd->virq = ret; } irqfd->users++; return 0; } static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, 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]; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_get_queue(vdev, queue_no); EventNotifier *n = virtio_queue_get_guest_notifier(vq); int ret; ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, NULL, irqfd->virq); return ret; } static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, unsigned int queue_no, unsigned int vector) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_get_queue(vdev, queue_no); EventNotifier *n = virtio_queue_get_guest_notifier(vq); VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; int ret; ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); assert(ret == 0); } static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) { PCIDevice *dev = &proxy->pci_dev; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(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 (k->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; undo: while (--queue_no >= 0) { vector = virtio_queue_vector(vdev, queue_no); if (vector >= msix_nr_vectors_allocated(dev)) { continue; } if (k->guest_notifier_mask) { kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); } kvm_virtio_pci_vq_vector_release(proxy, vector); } return ret; } static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) { PCIDevice *dev = &proxy->pci_dev; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); unsigned int vector; int queue_no; VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 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 (k->guest_notifier_mask) { kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); } kvm_virtio_pci_vq_vector_release(proxy, vector); } } static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, unsigned int queue_no, unsigned int vector, MSIMessage msg) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); VirtQueue *vq = virtio_get_queue(vdev, queue_no); EventNotifier *n = virtio_queue_get_guest_notifier(vq); VirtIOIRQFD *irqfd; int ret = 0; if (proxy->vector_irqfd) { irqfd = &proxy->vector_irqfd[vector]; 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 (k->guest_notifier_mask) { k->guest_notifier_mask(vdev, queue_no, false); /* Test after unmasking to avoid losing events. */ if (k->guest_notifier_pending && k->guest_notifier_pending(vdev, queue_no)) { event_notifier_set(n); } } else { ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); } return ret; } static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, unsigned int queue_no, unsigned int vector) { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); /* If guest supports masking, keep irqfd but mask it. * Otherwise, clean it up now. */ if (k->guest_notifier_mask) { k->guest_notifier_mask(vdev, queue_no, true); } else { kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); } } static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, MSIMessage msg) { VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_vector_first_queue(vdev, vector); int ret, index, unmasked = 0; while (vq) { index = virtio_get_queue_index(vq); if (!virtio_queue_get_num(vdev, index)) { break; } if (index < proxy->nvqs_with_notifiers) { ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg); if (ret < 0) { goto undo; } ++unmasked; } vq = virtio_vector_next_queue(vq); } return 0; undo: vq = virtio_vector_first_queue(vdev, vector); while (vq && unmasked >= 0) { index = virtio_get_queue_index(vq); if (index < proxy->nvqs_with_notifiers) { virtio_pci_vq_vector_mask(proxy, index, vector); --unmasked; } vq = virtio_vector_next_queue(vq); } return ret; } static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) { VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_vector_first_queue(vdev, vector); int index; while (vq) { index = virtio_get_queue_index(vq); if (!virtio_queue_get_num(vdev, index)) { break; } if (index < proxy->nvqs_with_notifiers) { virtio_pci_vq_vector_mask(proxy, index, vector); } vq = virtio_vector_next_queue(vq); } } static void virtio_pci_vector_poll(PCIDevice *dev, unsigned int vector_start, unsigned int vector_end) { VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(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 (k->guest_notifier_pending) { if (k->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); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); VirtQueue *vq = virtio_get_queue(vdev, n); EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); if (assign) { int r = event_notifier_init(notifier, 0); if (r < 0) { return r; } virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); } else { virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); event_notifier_cleanup(notifier); } if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) { vdc->guest_notifier_mask(vdev, n, !assign); } return 0; } static bool virtio_pci_query_guest_notifiers(DeviceState *d) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); return msix_enabled(&proxy->pci_dev); } static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); int r, n; bool with_irqfd = msix_enabled(&proxy->pci_dev) && kvm_msi_via_irqfd_enabled(); nvqs = MIN(nvqs, VIRTIO_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 ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) { msix_unset_vector_notifiers(&proxy->pci_dev); if (proxy->vector_irqfd) { kvm_virtio_pci_vector_release(proxy, nvqs); g_free(proxy->vector_irqfd); proxy->vector_irqfd = NULL; } } for (n = 0; n < nvqs; n++) { if (!virtio_queue_get_num(vdev, n)) { break; } r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd); if (r < 0) { goto assign_error; } } /* Must set vector notifier after guest notifier has been assigned */ if ((with_irqfd || k->guest_notifier_mask) && assign) { if (with_irqfd) { proxy->vector_irqfd = g_malloc0(sizeof(*proxy->vector_irqfd) * msix_nr_vectors_allocated(&proxy->pci_dev)); r = kvm_virtio_pci_vector_use(proxy, nvqs); if (r < 0) { goto assign_error; } } r = msix_set_vector_notifiers(&proxy->pci_dev, virtio_pci_vector_unmask, virtio_pci_vector_mask, virtio_pci_vector_poll); if (r < 0) { goto notifiers_error; } } return 0; notifiers_error: if (with_irqfd) { 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(d, n, !assign, with_irqfd); } return r; } static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) { 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. */ proxy->ioeventfd_disabled = assign; if (assign) { virtio_pci_stop_ioeventfd(proxy); } /* We don't need to start here: it's not needed because backend * currently only stops on status change away from ok, * reset, vmstop and such. If we do add code to start here, * need to check vmstate, device state etc. */ return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); } static void virtio_pci_vmstate_change(DeviceState *d, bool running) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); if (running) { /* Old QEMU versions did not set bus master enable on status write. * Detect DRIVER set and enable it. */ if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) && (vdev->status & VIRTIO_CONFIG_S_DRIVER) && !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { pci_default_write_config(&proxy->pci_dev, PCI_COMMAND, proxy->pci_dev.config[PCI_COMMAND] | PCI_COMMAND_MASTER, 1); } virtio_pci_start_ioeventfd(proxy); } else { virtio_pci_stop_ioeventfd(proxy); } } #ifdef CONFIG_VIRTFS static void virtio_9p_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } static Property virtio_9p_pci_properties[] = { DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), DEFINE_PROP_END_OF_LIST(), }; static void virtio_9p_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); k->realize = virtio_9p_pci_realize; pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P; pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; pcidev_k->class_id = 0x2; set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); dc->props = virtio_9p_pci_properties; } static void virtio_9p_pci_instance_init(Object *obj) { V9fsPCIState *dev = VIRTIO_9P_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_9P); } static const TypeInfo virtio_9p_pci_info = { .name = TYPE_VIRTIO_9P_PCI, .parent = TYPE_VIRTIO_PCI, .instance_size = sizeof(V9fsPCIState), .instance_init = virtio_9p_pci_instance_init, .class_init = virtio_9p_pci_class_init, }; #endif /* CONFIG_VIRTFS */ /* * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. */ static int virtio_pci_query_nvectors(DeviceState *d) { VirtIOPCIProxy *proxy = VIRTIO_PCI(d); return proxy->nvectors; } static void virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, struct virtio_pci_cap *cap) { PCIDevice *dev = &proxy->pci_dev; int offset; offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, cap->cap_len); assert(offset > 0); assert(cap->cap_len >= sizeof *cap); memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len, cap->cap_len - PCI_CAP_FLAGS); } static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, unsigned size) { VirtIOPCIProxy *proxy = opaque; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); uint32_t val = 0; int i; switch (addr) { case VIRTIO_PCI_COMMON_DFSELECT: val = proxy->dfselect; break; case VIRTIO_PCI_COMMON_DF: if (proxy->dfselect <= 1) { val = vdev->host_features >> (32 * proxy->dfselect); } break; case VIRTIO_PCI_COMMON_GFSELECT: val = proxy->gfselect; break; case VIRTIO_PCI_COMMON_GF: if (proxy->gfselect <= ARRAY_SIZE(proxy->guest_features)) { val = proxy->guest_features[proxy->gfselect]; } break; case VIRTIO_PCI_COMMON_MSIX: val = vdev->config_vector; break; case VIRTIO_PCI_COMMON_NUMQ: for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) { if (virtio_queue_get_num(vdev, i)) { val = i + 1; } } break; case VIRTIO_PCI_COMMON_STATUS: val = vdev->status; break; case VIRTIO_PCI_COMMON_CFGGENERATION: val = vdev->generation; break; case VIRTIO_PCI_COMMON_Q_SELECT: val = vdev->queue_sel; break; case VIRTIO_PCI_COMMON_Q_SIZE: val = virtio_queue_get_num(vdev, vdev->queue_sel); break; case VIRTIO_PCI_COMMON_Q_MSIX: val = virtio_queue_vector(vdev, vdev->queue_sel); break; case VIRTIO_PCI_COMMON_Q_ENABLE: val = proxy->vqs[vdev->queue_sel].enabled; break; case VIRTIO_PCI_COMMON_Q_NOFF: /* Simply map queues in order */ val = vdev->queue_sel; break; case VIRTIO_PCI_COMMON_Q_DESCLO: val = proxy->vqs[vdev->queue_sel].desc[0]; break; case VIRTIO_PCI_COMMON_Q_DESCHI: val = proxy->vqs[vdev->queue_sel].desc[1]; break; case VIRTIO_PCI_COMMON_Q_AVAILLO: val = proxy->vqs[vdev->queue_sel].avail[0]; break; case VIRTIO_PCI_COMMON_Q_AVAILHI: val = proxy->vqs[vdev->queue_sel].avail[1]; break; case VIRTIO_PCI_COMMON_Q_USEDLO: val = proxy->vqs[vdev->queue_sel].used[0]; break; case VIRTIO_PCI_COMMON_Q_USEDHI: val = proxy->vqs[vdev->queue_sel].used[1]; break; default: val = 0; } return val; } static void virtio_pci_common_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { VirtIOPCIProxy *proxy = opaque; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); switch (addr) { case VIRTIO_PCI_COMMON_DFSELECT: proxy->dfselect = val; break; case VIRTIO_PCI_COMMON_GFSELECT: proxy->gfselect = val; break; case VIRTIO_PCI_COMMON_GF: if (proxy->gfselect <= ARRAY_SIZE(proxy->guest_features)) { proxy->guest_features[proxy->gfselect] = val; virtio_set_features(vdev, (((uint64_t)proxy->guest_features[1]) << 32) | proxy->guest_features[0]); } break; case VIRTIO_PCI_COMMON_MSIX: msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); /* Make it possible for guest to discover an error took place. */ if (msix_vector_use(&proxy->pci_dev, val) < 0) { val = VIRTIO_NO_VECTOR; } vdev->config_vector = val; break; case VIRTIO_PCI_COMMON_STATUS: if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { virtio_pci_stop_ioeventfd(proxy); } virtio_set_status(vdev, val & 0xFF); if (val & VIRTIO_CONFIG_S_DRIVER_OK) { virtio_pci_start_ioeventfd(proxy); } if (vdev->status == 0) { virtio_reset(vdev); msix_unuse_all_vectors(&proxy->pci_dev); } break; case VIRTIO_PCI_COMMON_Q_SELECT: if (val < VIRTIO_QUEUE_MAX) { vdev->queue_sel = val; } break; case VIRTIO_PCI_COMMON_Q_SIZE: proxy->vqs[vdev->queue_sel].num = val; break; case VIRTIO_PCI_COMMON_Q_MSIX: msix_vector_unuse(&proxy->pci_dev, virtio_queue_vector(vdev, vdev->queue_sel)); /* Make it possible for guest to discover an error took place. */ if (msix_vector_use(&proxy->pci_dev, val) < 0) { val = VIRTIO_NO_VECTOR; } virtio_queue_set_vector(vdev, vdev->queue_sel, val); break; case VIRTIO_PCI_COMMON_Q_ENABLE: /* TODO: need a way to put num back on reset. */ virtio_queue_set_num(vdev, vdev->queue_sel, proxy->vqs[vdev->queue_sel].num); virtio_queue_set_rings(vdev, vdev->queue_sel, ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 | proxy->vqs[vdev->queue_sel].desc[0], ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 | proxy->vqs[vdev->queue_sel].avail[0], ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 | proxy->vqs[vdev->queue_sel].used[0]); break; case VIRTIO_PCI_COMMON_Q_DESCLO: proxy->vqs[vdev->queue_sel].desc[0] = val; break; case VIRTIO_PCI_COMMON_Q_DESCHI: proxy->vqs[vdev->queue_sel].desc[1] = val; break; case VIRTIO_PCI_COMMON_Q_AVAILLO: proxy->vqs[vdev->queue_sel].avail[0] = val; break; case VIRTIO_PCI_COMMON_Q_AVAILHI: proxy->vqs[vdev->queue_sel].avail[1] = val; break; case VIRTIO_PCI_COMMON_Q_USEDLO: proxy->vqs[vdev->queue_sel].used[0] = val; break; case VIRTIO_PCI_COMMON_Q_USEDHI: proxy->vqs[vdev->queue_sel].used[1] = val; break; default: break; } } static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr, unsigned size) { return 0; } static void virtio_pci_notify_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { VirtIODevice *vdev = opaque; unsigned queue = addr / QEMU_VIRTIO_PCI_QUEUE_MEM_MULT; if (queue < VIRTIO_QUEUE_MAX) { virtio_queue_notify(vdev, queue); } } static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr, unsigned size) { VirtIOPCIProxy *proxy = opaque; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); uint64_t val = vdev->isr; vdev->isr = 0; pci_irq_deassert(&proxy->pci_dev); return val; } static void virtio_pci_isr_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { } static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr, unsigned size) { VirtIODevice *vdev = opaque; uint64_t val = 0; switch (size) { case 1: val = virtio_config_modern_readb(vdev, addr); break; case 2: val = virtio_config_modern_readw(vdev, addr); break; case 4: val = virtio_config_modern_readl(vdev, addr); break; } return val; } static void virtio_pci_device_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { VirtIODevice *vdev = opaque; switch (size) { case 1: virtio_config_modern_writeb(vdev, addr, val); break; case 2: virtio_config_modern_writew(vdev, addr, val); break; case 4: virtio_config_modern_writel(vdev, addr, val); break; } } static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy) { static const MemoryRegionOps common_ops = { .read = virtio_pci_common_read, .write = virtio_pci_common_write, .impl = { .min_access_size = 1, .max_access_size = 4, }, .endianness = DEVICE_LITTLE_ENDIAN, }; static const MemoryRegionOps isr_ops = { .read = virtio_pci_isr_read, .write = virtio_pci_isr_write, .impl = { .min_access_size = 1, .max_access_size = 4, }, .endianness = DEVICE_LITTLE_ENDIAN, }; static const MemoryRegionOps device_ops = { .read = virtio_pci_device_read, .write = virtio_pci_device_write, .impl = { .min_access_size = 1, .max_access_size = 4, }, .endianness = DEVICE_LITTLE_ENDIAN, }; static const MemoryRegionOps notify_ops = { .read = virtio_pci_notify_read, .write = virtio_pci_notify_write, .impl = { .min_access_size = 1, .max_access_size = 4, }, .endianness = DEVICE_LITTLE_ENDIAN, }; memory_region_init_io(&proxy->common.mr, OBJECT(proxy), &common_ops, proxy, "virtio-pci-common", 0x1000); proxy->common.offset = 0x0; memory_region_init_io(&proxy->isr.mr, OBJECT(proxy), &isr_ops, proxy, "virtio-pci-isr", 0x1000); proxy->isr.offset = 0x1000; memory_region_init_io(&proxy->device.mr, OBJECT(proxy), &device_ops, virtio_bus_get_device(&proxy->bus), "virtio-pci-device", 0x1000); proxy->device.offset = 0x2000; memory_region_init_io(&proxy->notify.mr, OBJECT(proxy), ¬ify_ops, virtio_bus_get_device(&proxy->bus), "virtio-pci-notify", QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * VIRTIO_QUEUE_MAX); proxy->notify.offset = 0x3000; } static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy, VirtIOPCIRegion *region, struct virtio_pci_cap *cap) { memory_region_add_subregion(&proxy->modern_bar, region->offset, ®ion->mr); cap->offset = cpu_to_le32(region->offset); cap->length = cpu_to_le32(memory_region_size(®ion->mr)); virtio_pci_add_mem_cap(proxy, cap); } /* This is called by virtio-bus just after the device is plugged. */ static void virtio_pci_device_plugged(DeviceState *d, Error **errp) { VirtIOPCIProxy *proxy = VIRTIO_PCI(d); VirtioBusState *bus = &proxy->bus; bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY); bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN); uint8_t *config; uint32_t size; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); /* * virtio pci bar layout * * region 0 -- virtio legacy io bar * region 1 -- msi-x bar * region 2+3 -- not used by virtio-pci * region 4+5 -- virtio modern memory (64bit) bar * * Regions 2+3 can be used by VirtIOPCIProxy subclasses. * virtio-vga places the vga framebuffer there. * */ uint32_t legacy_io_bar = 0; uint32_t msix_bar = 1; uint32_t modern_mem_bar = 4; config = proxy->pci_dev.config; if (proxy->class_code) { pci_config_set_class(config, proxy->class_code); } if (legacy) { /* legacy and transitional */ 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)); } else { /* pure virtio-1.0 */ pci_set_word(config + PCI_VENDOR_ID, PCI_VENDOR_ID_REDHAT_QUMRANET); pci_set_word(config + PCI_DEVICE_ID, 0x1040 + virtio_bus_get_vdev_id(bus)); pci_config_set_revision(config, 1); } config[PCI_INTERRUPT_PIN] = 1; if (modern) { struct virtio_pci_cap common = { .cfg_type = VIRTIO_PCI_CAP_COMMON_CFG, .cap_len = sizeof common, .bar = modern_mem_bar, }; struct virtio_pci_cap isr = { .cfg_type = VIRTIO_PCI_CAP_ISR_CFG, .cap_len = sizeof isr, .bar = modern_mem_bar, }; struct virtio_pci_cap device = { .cfg_type = VIRTIO_PCI_CAP_DEVICE_CFG, .cap_len = sizeof device, .bar = modern_mem_bar, }; struct virtio_pci_notify_cap notify = { .cap.cfg_type = VIRTIO_PCI_CAP_NOTIFY_CFG, .cap.cap_len = sizeof notify, .cap.bar = modern_mem_bar, .notify_off_multiplier = cpu_to_le32(QEMU_VIRTIO_PCI_QUEUE_MEM_MULT), }; /* TODO: add io access for speed */ virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1); memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci", 2 * QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * VIRTIO_QUEUE_MAX); virtio_pci_modern_regions_init(proxy); virtio_pci_modern_region_map(proxy, &proxy->common, &common); virtio_pci_modern_region_map(proxy, &proxy->isr, &isr); virtio_pci_modern_region_map(proxy, &proxy->device, &device); virtio_pci_modern_region_map(proxy, &proxy->notify, ¬ify.cap); pci_register_bar(&proxy->pci_dev, modern_mem_bar, PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_PREFETCH | PCI_BASE_ADDRESS_MEM_TYPE_64, &proxy->modern_bar); } if (proxy->nvectors && msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, msix_bar)) { error_report("unable to init msix vectors to %" PRIu32, proxy->nvectors); proxy->nvectors = 0; } proxy->pci_dev.config_write = virtio_write_config; if (legacy) { 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, OBJECT(proxy), &virtio_pci_config_ops, proxy, "virtio-pci", size); pci_register_bar(&proxy->pci_dev, legacy_io_bar, PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar); } if (!kvm_has_many_ioeventfds()) { proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; } virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE); } static void virtio_pci_device_unplugged(DeviceState *d) { VirtIOPCIProxy *proxy = VIRTIO_PCI(d); virtio_pci_stop_ioeventfd(proxy); } static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp) { VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev); VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); virtio_pci_bus_new(&dev->bus, sizeof(dev->bus), dev); if (k->realize) { k->realize(dev, errp); } } static void virtio_pci_exit(PCIDevice *pci_dev) { msix_uninit_exclusive_bar(pci_dev); } static void virtio_pci_reset(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); } static Property virtio_pci_properties[] = { DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false), DEFINE_PROP_BIT("disable-legacy", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_DISABLE_LEGACY_BIT, false), DEFINE_PROP_BIT("disable-modern", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_DISABLE_MODERN_BIT, true), DEFINE_PROP_END_OF_LIST(), }; static void virtio_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); dc->props = virtio_pci_properties; k->realize = virtio_pci_realize; 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_reset; } 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-blk-pci */ static Property virtio_blk_pci_properties[] = { DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), DEFINE_PROP_END_OF_LIST(), }; static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); dc->props = virtio_blk_pci_properties; k->realize = virtio_blk_pci_realize; pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; } static void virtio_blk_pci_instance_init(Object *obj) { VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK); object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", &error_abort); object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), "bootindex", &error_abort); } static const TypeInfo virtio_blk_pci_info = { .name = TYPE_VIRTIO_BLK_PCI, .parent = TYPE_VIRTIO_PCI, .instance_size = sizeof(VirtIOBlkPCI), .instance_init = virtio_blk_pci_instance_init, .class_init = virtio_blk_pci_class_init, }; /* virtio-scsi-pci */ static Property virtio_scsi_pci_properties[] = { DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED), DEFINE_PROP_END_OF_LIST(), }; static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); DeviceState *proxy = DEVICE(vpci_dev); char *bus_name; if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { vpci_dev->nvectors = vs->conf.num_queues + 3; } /* * For command line compatibility, this sets the virtio-scsi-device bus * name as before. */ if (proxy->id) { bus_name = g_strdup_printf("%s.0", proxy->id); virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); g_free(bus_name); } qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); k->realize = virtio_scsi_pci_realize; set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); dc->props = virtio_scsi_pci_properties; pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; pcidev_k->revision = 0x00; pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; } static void virtio_scsi_pci_instance_init(Object *obj) { VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI); object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread", &error_abort); } static const TypeInfo virtio_scsi_pci_info = { .name = TYPE_VIRTIO_SCSI_PCI, .parent = TYPE_VIRTIO_PCI, .instance_size = sizeof(VirtIOSCSIPCI), .instance_init = virtio_scsi_pci_instance_init, .class_init = virtio_scsi_pci_class_init, }; /* vhost-scsi-pci */ #ifdef CONFIG_VHOST_SCSI static Property vhost_scsi_pci_properties[] = { DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED), DEFINE_PROP_END_OF_LIST(), }; static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { vpci_dev->nvectors = vs->conf.num_queues + 3; } qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); k->realize = vhost_scsi_pci_realize; set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); dc->props = vhost_scsi_pci_properties; pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; pcidev_k->revision = 0x00; pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; } static void vhost_scsi_pci_instance_init(Object *obj) { VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI); object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), "bootindex", &error_abort); } static const TypeInfo vhost_scsi_pci_info = { .name = TYPE_VHOST_SCSI_PCI, .parent = TYPE_VIRTIO_PCI, .instance_size = sizeof(VHostSCSIPCI), .instance_init = vhost_scsi_pci_instance_init, .class_init = vhost_scsi_pci_class_init, }; #endif /* virtio-balloon-pci */ static Property virtio_balloon_pci_properties[] = { DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), DEFINE_PROP_END_OF_LIST(), }; static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); if (vpci_dev->class_code != PCI_CLASS_OTHERS && vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */ vpci_dev->class_code = PCI_CLASS_OTHERS; } qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); k->realize = virtio_balloon_pci_realize; set_bit(DEVICE_CATEGORY_MISC, dc->categories); dc->props = virtio_balloon_pci_properties; pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; pcidev_k->class_id = PCI_CLASS_OTHERS; } static void virtio_balloon_pci_instance_init(Object *obj) { VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON); object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev), "guest-stats", &error_abort); object_property_add_alias(obj, "guest-stats-polling-interval", OBJECT(&dev->vdev), "guest-stats-polling-interval", &error_abort); } static const TypeInfo virtio_balloon_pci_info = { .name = TYPE_VIRTIO_BALLOON_PCI, .parent = TYPE_VIRTIO_PCI, .instance_size = sizeof(VirtIOBalloonPCI), .instance_init = virtio_balloon_pci_instance_init, .class_init = virtio_balloon_pci_class_init, }; /* virtio-serial-pci */ static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); DeviceState *proxy = DEVICE(vpci_dev); char *bus_name; if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER && vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */ vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */ vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER; } /* backwards-compatibility with machines that were created with DEV_NVECTORS_UNSPECIFIED */ if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1; } /* * For command line compatibility, this sets the virtio-serial-device bus * name as before. */ if (proxy->id) { bus_name = g_strdup_printf("%s.0", proxy->id); virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); g_free(bus_name); } qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } static Property virtio_serial_pci_properties[] = { DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), DEFINE_PROP_END_OF_LIST(), }; static void virtio_serial_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); k->realize = virtio_serial_pci_realize; set_bit(DEVICE_CATEGORY_INPUT, dc->categories); dc->props = virtio_serial_pci_properties; pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER; } static void virtio_serial_pci_instance_init(Object *obj) { VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL); } static const TypeInfo virtio_serial_pci_info = { .name = TYPE_VIRTIO_SERIAL_PCI, .parent = TYPE_VIRTIO_PCI, .instance_size = sizeof(VirtIOSerialPCI), .instance_init = virtio_serial_pci_instance_init, .class_init = virtio_serial_pci_class_init, }; /* virtio-net-pci */ static Property virtio_net_properties[] = { DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), DEFINE_PROP_END_OF_LIST(), }; static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { DeviceState *qdev = DEVICE(vpci_dev); VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); virtio_net_set_netclient_name(&dev->vdev, qdev->id, object_get_typename(OBJECT(qdev))); qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } static void virtio_net_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass); k->romfile = "efi-virtio.rom"; k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; k->device_id = PCI_DEVICE_ID_VIRTIO_NET; k->revision = VIRTIO_PCI_ABI_VERSION; k->class_id = PCI_CLASS_NETWORK_ETHERNET; set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); dc->props = virtio_net_properties; vpciklass->realize = virtio_net_pci_realize; } static void virtio_net_pci_instance_init(Object *obj) { VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET); object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), "bootindex", &error_abort); } static const TypeInfo virtio_net_pci_info = { .name = TYPE_VIRTIO_NET_PCI, .parent = TYPE_VIRTIO_PCI, .instance_size = sizeof(VirtIONetPCI), .instance_init = virtio_net_pci_instance_init, .class_init = virtio_net_pci_class_init, }; /* virtio-rng-pci */ static Property virtio_rng_pci_properties[] = { DEFINE_PROP_END_OF_LIST(), }; static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev); DeviceState *vdev = DEVICE(&vrng->vdev); Error *err = NULL; qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", &err); if (err) { error_propagate(errp, err); return; } object_property_set_link(OBJECT(vrng), OBJECT(vrng->vdev.conf.rng), "rng", NULL); } static void virtio_rng_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); k->realize = virtio_rng_pci_realize; set_bit(DEVICE_CATEGORY_MISC, dc->categories); dc->props = virtio_rng_pci_properties; pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; pcidev_k->class_id = PCI_CLASS_OTHERS; } static void virtio_rng_initfn(Object *obj) { VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG); object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), "rng", &error_abort); } static const TypeInfo virtio_rng_pci_info = { .name = TYPE_VIRTIO_RNG_PCI, .parent = TYPE_VIRTIO_PCI, .instance_size = sizeof(VirtIORngPCI), .instance_init = virtio_rng_initfn, .class_init = virtio_rng_pci_class_init, }; /* virtio-pci-bus */ static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, VirtIOPCIProxy *dev) { DeviceState *qdev = DEVICE(dev); char virtio_bus_name[] = "virtio-bus"; qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev, virtio_bus_name); } 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->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_unplugged = virtio_pci_device_unplugged; k->query_nvectors = virtio_pci_query_nvectors; } 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_rng_pci_info); type_register_static(&virtio_pci_bus_info); type_register_static(&virtio_pci_info); #ifdef CONFIG_VIRTFS type_register_static(&virtio_9p_pci_info); #endif type_register_static(&virtio_blk_pci_info); type_register_static(&virtio_scsi_pci_info); type_register_static(&virtio_balloon_pci_info); type_register_static(&virtio_serial_pci_info); type_register_static(&virtio_net_pci_info); #ifdef CONFIG_VHOST_SCSI type_register_static(&vhost_scsi_pci_info); #endif } type_init(virtio_pci_register_types)