/* * 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 "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/blockdev.h" #include "virtio-pci.h" #include "qemu/range.h" #include "hw/virtio/virtio-bus.h" /* from Linux's linux/virtio_pci.h */ /* A 32-bit r/o bitmask of the features supported by the host */ #define VIRTIO_PCI_HOST_FEATURES 0 /* A 32-bit r/w bitmask of features activated by the guest */ #define VIRTIO_PCI_GUEST_FEATURES 4 /* A 32-bit r/w PFN for the currently selected queue */ #define VIRTIO_PCI_QUEUE_PFN 8 /* A 16-bit r/o queue size for the currently selected queue */ #define VIRTIO_PCI_QUEUE_NUM 12 /* A 16-bit r/w queue selector */ #define VIRTIO_PCI_QUEUE_SEL 14 /* A 16-bit r/w queue notifier */ #define VIRTIO_PCI_QUEUE_NOTIFY 16 /* An 8-bit device status register. */ #define VIRTIO_PCI_STATUS 18 /* An 8-bit r/o interrupt status register. Reading the value will return the * current contents of the ISR and will also clear it. This is effectively * a read-and-acknowledge. */ #define VIRTIO_PCI_ISR 19 /* MSI-X registers: only enabled if MSI-X is enabled. */ /* A 16-bit vector for configuration changes. */ #define VIRTIO_MSI_CONFIG_VECTOR 20 /* A 16-bit vector for selected queue notifications. */ #define VIRTIO_MSI_QUEUE_VECTOR 22 /* Config space size */ #define VIRTIO_PCI_CONFIG_NOMSI 20 #define VIRTIO_PCI_CONFIG_MSI 24 #define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \ VIRTIO_PCI_CONFIG_MSI : \ VIRTIO_PCI_CONFIG_NOMSI) /* The remaining space is defined by each driver as the per-driver * configuration space */ #define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \ VIRTIO_PCI_CONFIG_MSI : \ VIRTIO_PCI_CONFIG_NOMSI) /* How many bits to shift physical queue address written to QUEUE_PFN. * 12 is historical, and due to x86 page size. */ #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 /* Flags track per-device state like workarounds for quirks in older guests. */ #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0) /* QEMU doesn't strictly need write barriers since everything runs in * lock-step. We'll leave the calls to wmb() in though to make it obvious for * KVM or if kqemu gets SMP support. */ #define wmb() do { } while (0) /* HACK for virtio to determine if it's running a big endian guest */ 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); } /* 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 qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1); } static void virtio_pci_save_config(DeviceState *d, QEMUFile *f) { 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(DeviceState *d, int n, QEMUFile *f) { 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(DeviceState *d, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); 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, &proxy->vdev->config_vector); } else { proxy->vdev->config_vector = VIRTIO_NO_VECTOR; } if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) { return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector); } return 0; } static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); uint16_t vector; if (msix_present(&proxy->pci_dev)) { qemu_get_be16s(f, &vector); } else { vector = VIRTIO_NO_VECTOR; } virtio_queue_set_vector(proxy->vdev, n, vector); if (vector != VIRTIO_NO_VECTOR) { return msix_vector_use(&proxy->pci_dev, vector); } return 0; } static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, int n, bool assign, bool set_handler) { VirtQueue *vq = virtio_get_queue(proxy->vdev, n); EventNotifier *notifier = virtio_queue_get_host_notifier(vq); 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); memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, true, n, notifier); } else { memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 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) { int n, r; if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) || proxy->ioeventfd_disabled || proxy->ioeventfd_started) { return; } for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { if (!virtio_queue_get_num(proxy->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(proxy->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) { int r; int n; if (!proxy->ioeventfd_started) { return; } for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { if (!virtio_queue_get_num(proxy->vdev, n)) { continue; } r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); assert(r >= 0); } proxy->ioeventfd_started = false; } static void virtio_pci_reset(DeviceState *d) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); virtio_pci_stop_ioeventfd(proxy); virtio_reset(proxy->vdev); msix_unuse_all_vectors(&proxy->pci_dev); proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; } static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) { VirtIOPCIProxy *proxy = opaque; VirtIODevice *vdev = proxy->vdev; 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 = vdev->bad_features ? vdev->bad_features(vdev) : 0; } 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(proxy->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_PCI_QUEUE_MAX) vdev->queue_sel = val; break; case VIRTIO_PCI_QUEUE_NOTIFY: if (val < VIRTIO_PCI_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(proxy->vdev); msix_unuse_all_vectors(&proxy->pci_dev); } /* Linux before 2.6.34 sets the device as OK without enabling the PCI device bus master bit. In this case we need to disable some safety checks. */ if ((val & VIRTIO_CONFIG_S_DRIVER_OK) && !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; } 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 = proxy->vdev; uint32_t ret = 0xFFFFFFFF; switch (addr) { case VIRTIO_PCI_HOST_FEATURES: ret = proxy->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; qemu_set_irq(proxy->pci_dev.irq[0], 0); 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; uint32_t config = VIRTIO_PCI_CONFIG(&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(proxy->vdev, addr); break; case 2: val = virtio_config_readw(proxy->vdev, addr); if (virtio_is_big_endian()) { val = bswap16(val); } break; case 4: val = virtio_config_readl(proxy->vdev, addr); if (virtio_is_big_endian()) { 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(&proxy->pci_dev); 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(proxy->vdev, addr, val); break; case 2: if (virtio_is_big_endian()) { val = bswap16(val); } virtio_config_writew(proxy->vdev, addr, val); break; case 4: if (virtio_is_big_endian()) { val = bswap32(val); } virtio_config_writel(proxy->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); 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) && !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { virtio_pci_stop_ioeventfd(proxy); virtio_set_status(proxy->vdev, proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); } } static unsigned virtio_pci_get_features(DeviceState *d) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); return proxy->host_features; } 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]; 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]; 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 = 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; 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 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 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; 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 (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 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 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 < 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 = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg); if (ret < 0) { goto undo; } } return 0; undo: while (--queue_no >= 0) { if (virtio_queue_vector(vdev, queue_no) != vector) { continue; } virtio_pci_vq_vector_mask(proxy, queue_no, vector); } return ret; } static void 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 < proxy->nvqs_with_notifiers; queue_no++) { if (!virtio_queue_get_num(vdev, queue_no)) { break; } if (virtio_queue_vector(vdev, queue_no) != vector) { continue; } virtio_pci_vq_vector_mask(proxy, queue_no, vector); } } 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 = 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); 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); } 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 = 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 ((proxy->vector_irqfd || vdev->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, kvm_msi_via_irqfd_enabled()); if (r < 0) { goto assign_error; } } /* Must set vector notifier after guest notifier has been assigned */ if ((with_irqfd || vdev->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); if (running) { /* Try to find out if the guest has bus master disabled, but is in ready state. Then we have a buggy guest OS. */ if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) && !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; } virtio_pci_start_ioeventfd(proxy); } else { virtio_pci_stop_ioeventfd(proxy); } } static const VirtIOBindings virtio_pci_bindings = { .notify = virtio_pci_notify, .save_config = virtio_pci_save_config, .load_config = virtio_pci_load_config, .save_queue = virtio_pci_save_queue, .load_queue = virtio_pci_load_queue, .get_features = virtio_pci_get_features, .query_guest_notifiers = virtio_pci_query_guest_notifiers, .set_host_notifier = virtio_pci_set_host_notifier, .set_guest_notifiers = virtio_pci_set_guest_notifiers, .vmstate_change = virtio_pci_vmstate_change, }; void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev) { uint8_t *config; uint32_t size; proxy->vdev = 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, vdev->device_id); config[PCI_INTERRUPT_PIN] = 1; if (vdev->nvectors && msix_init_exclusive_bar(&proxy->pci_dev, vdev->nvectors, 1)) { vdev->nvectors = 0; } proxy->pci_dev.config_write = virtio_write_config; size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len; 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; } 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); } static void virtio_exit_pci(PCIDevice *pci_dev) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); memory_region_destroy(&proxy->bar); msix_uninit_exclusive_bar(pci_dev); } static int virtio_serial_init_pci(PCIDevice *pci_dev) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); VirtIODevice *vdev; if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER && proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */ proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */ proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER; vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial); if (!vdev) { return -1; } /* backwards-compatibility with machines that were created with DEV_NVECTORS_UNSPECIFIED */ vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED ? proxy->serial.max_virtserial_ports + 1 : proxy->nvectors; virtio_init_pci(proxy, vdev); proxy->nvectors = vdev->nvectors; return 0; } static void virtio_serial_exit_pci(PCIDevice *pci_dev) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); virtio_pci_stop_ioeventfd(proxy); virtio_serial_exit(proxy->vdev); virtio_exit_pci(pci_dev); } 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, proxy->host_features); vdev->nvectors = proxy->nvectors; virtio_init_pci(proxy, vdev); /* make the actual value visible */ proxy->nvectors = vdev->nvectors; return 0; } static void virtio_net_exit_pci(PCIDevice *pci_dev) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); virtio_pci_stop_ioeventfd(proxy); virtio_net_exit(proxy->vdev); virtio_exit_pci(pci_dev); } static int virtio_rng_init_pci(PCIDevice *pci_dev) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); VirtIODevice *vdev; if (proxy->rng.rng == NULL) { proxy->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM)); object_property_add_child(OBJECT(pci_dev), "default-backend", OBJECT(proxy->rng.default_backend), NULL); object_property_set_link(OBJECT(pci_dev), OBJECT(proxy->rng.default_backend), "rng", NULL); } vdev = virtio_rng_init(&pci_dev->qdev, &proxy->rng); if (!vdev) { return -1; } virtio_init_pci(proxy, vdev); return 0; } static void virtio_rng_exit_pci(PCIDevice *pci_dev) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); virtio_pci_stop_ioeventfd(proxy); virtio_rng_exit(proxy->vdev); virtio_exit_pci(pci_dev); } 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_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic), DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy, net.txtimer, TX_TIMER_INTERVAL), DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy, net.txburst, TX_BURST), DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx), DEFINE_PROP_END_OF_LIST(), }; static void virtio_net_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->init = virtio_net_init_pci; k->exit = virtio_net_exit_pci; 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; dc->reset = virtio_pci_reset; dc->props = virtio_net_properties; } static const TypeInfo virtio_net_info = { .name = "virtio-net-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), .class_init = virtio_net_class_init, }; static Property virtio_serial_properties[] = { DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31), DEFINE_PROP_END_OF_LIST(), }; static void virtio_serial_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->init = virtio_serial_init_pci; k->exit = virtio_serial_exit_pci; k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; k->revision = VIRTIO_PCI_ABI_VERSION; k->class_id = PCI_CLASS_COMMUNICATION_OTHER; dc->reset = virtio_pci_reset; dc->props = virtio_serial_properties; } static const TypeInfo virtio_serial_info = { .name = "virtio-serial-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), .class_init = virtio_serial_class_init, }; static void virtio_rng_initfn(Object *obj) { PCIDevice *pci_dev = PCI_DEVICE(obj); VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); object_property_add_link(obj, "rng", TYPE_RNG_BACKEND, (Object **)&proxy->rng.rng, NULL); } static Property virtio_rng_properties[] = { DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), /* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If you have an entropy source capable of generating more entropy than this and you can pass it through via virtio-rng, then hats off to you. Until then, this is unlimited for all practical purposes. */ DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy, rng.max_bytes, INT64_MAX), DEFINE_PROP_UINT32("period", VirtIOPCIProxy, rng.period_ms, 1 << 16), DEFINE_PROP_END_OF_LIST(), }; static void virtio_rng_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->init = virtio_rng_init_pci; k->exit = virtio_rng_exit_pci; k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; k->revision = VIRTIO_PCI_ABI_VERSION; k->class_id = PCI_CLASS_OTHERS; dc->reset = virtio_pci_reset; dc->props = virtio_rng_properties; } static const TypeInfo virtio_rng_info = { .name = "virtio-rng-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), .instance_init = virtio_rng_initfn, .class_init = virtio_rng_class_init, }; #ifdef CONFIG_VIRTFS static int virtio_9p_init_pci(PCIDevice *pci_dev) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); VirtIODevice *vdev; vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf); vdev->nvectors = proxy->nvectors; virtio_init_pci(proxy, vdev); /* make the actual value visible */ proxy->nvectors = vdev->nvectors; return 0; } static Property virtio_9p_properties[] = { DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag), DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id), DEFINE_PROP_END_OF_LIST(), }; static void virtio_9p_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->init = virtio_9p_init_pci; k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; k->device_id = PCI_DEVICE_ID_VIRTIO_9P; k->revision = VIRTIO_PCI_ABI_VERSION; k->class_id = 0x2; dc->props = virtio_9p_properties; dc->reset = virtio_pci_reset; } static const TypeInfo virtio_9p_info = { .name = "virtio-9p-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(VirtIOPCIProxy), .class_init = virtio_9p_class_init, }; #endif /* * 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); } 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); virtio_pci_stop_ioeventfd(proxy); 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-blk-pci */ static Property virtio_blk_pci_properties[] = { DEFINE_PROP_HEX32("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), #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false), #endif DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk), DEFINE_PROP_END_OF_LIST(), }; static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev) { VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); virtio_blk_set_conf(vdev, &(dev->blk)); qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); if (qdev_init(vdev) < 0) { return -1; } return 0; } 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); dc->props = virtio_blk_pci_properties; k->init = virtio_blk_pci_init; 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); object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); } 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_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features), DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.conf), DEFINE_PROP_END_OF_LIST(), }; static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) { VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { vpci_dev->nvectors = dev->vdev.conf.num_queues + 3; } qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); if (qdev_init(vdev) < 0) { return -1; } return 0; } 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->init = virtio_scsi_pci_init_pci; 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); object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); } 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, }; /* virtio-balloon-pci */ static Property virtio_balloon_pci_properties[] = { DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), DEFINE_PROP_END_OF_LIST(), }; static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev) { 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)); if (qdev_init(vdev) < 0) { return -1; } return 0; } 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->init = virtio_balloon_pci_init; 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); object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BALLOON); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); } 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-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 = 1; } 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; } 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_net_info); type_register_static(&virtio_serial_info); type_register_static(&virtio_rng_info); type_register_static(&virtio_pci_bus_info); type_register_static(&virtio_pci_info); #ifdef CONFIG_VIRTFS type_register_static(&virtio_9p_info); #endif type_register_static(&virtio_blk_pci_info); type_register_static(&virtio_scsi_pci_info); type_register_static(&virtio_balloon_pci_info); } type_init(virtio_pci_register_types)