/* * 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 "qemu/osdep.h" #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 "qapi/error.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 "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); static void virtio_pci_reset(DeviceState *qdev); /* 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, atomic_read(&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 const VMStateDescription vmstate_virtio_pci_modern_queue_state = { .name = "virtio_pci/modern_queue_state", .version_id = 1, .minimum_version_id = 1, .fields = (VMStateField[]) { VMSTATE_UINT16(num, VirtIOPCIQueue), VMSTATE_UNUSED(1), /* enabled was stored as be16 */ VMSTATE_BOOL(enabled, VirtIOPCIQueue), VMSTATE_UINT32_ARRAY(desc, VirtIOPCIQueue, 2), VMSTATE_UINT32_ARRAY(avail, VirtIOPCIQueue, 2), VMSTATE_UINT32_ARRAY(used, VirtIOPCIQueue, 2), VMSTATE_END_OF_LIST() } }; static bool virtio_pci_modern_state_needed(void *opaque) { VirtIOPCIProxy *proxy = opaque; return virtio_pci_modern(proxy); } static const VMStateDescription vmstate_virtio_pci_modern_state_sub = { .name = "virtio_pci/modern_state", .version_id = 1, .minimum_version_id = 1, .needed = &virtio_pci_modern_state_needed, .fields = (VMStateField[]) { VMSTATE_UINT32(dfselect, VirtIOPCIProxy), VMSTATE_UINT32(gfselect, VirtIOPCIProxy), VMSTATE_UINT32_ARRAY(guest_features, VirtIOPCIProxy, 2), VMSTATE_STRUCT_ARRAY(vqs, VirtIOPCIProxy, VIRTIO_QUEUE_MAX, 0, vmstate_virtio_pci_modern_queue_state, VirtIOPCIQueue), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_virtio_pci = { .name = "virtio_pci", .version_id = 1, .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField[]) { VMSTATE_END_OF_LIST() }, .subsections = (const VMStateDescription*[]) { &vmstate_virtio_pci_modern_state_sub, NULL } }; static bool virtio_pci_has_extra_state(DeviceState *d) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA; } static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL); } static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1); } 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; } static bool virtio_pci_ioeventfd_enabled(DeviceState *d) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0; } #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000 static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy *proxy) { return (proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ) ? QEMU_VIRTIO_PCI_QUEUE_MEM_MULT : 4; } static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier, int n, bool assign) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_get_queue(vdev, n); bool legacy = virtio_pci_legacy(proxy); bool modern = virtio_pci_modern(proxy); bool fast_mmio = kvm_ioeventfd_any_length_enabled(); bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; MemoryRegion *modern_mr = &proxy->notify.mr; MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr; MemoryRegion *legacy_mr = &proxy->bar; hwaddr modern_addr = virtio_pci_queue_mem_mult(proxy) * virtio_get_queue_index(vq); hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY; if (assign) { if (modern) { if (fast_mmio) { memory_region_add_eventfd(modern_mr, modern_addr, 0, false, n, notifier); } else { memory_region_add_eventfd(modern_mr, modern_addr, 2, false, n, notifier); } if (modern_pio) { memory_region_add_eventfd(modern_notify_mr, 0, 2, true, n, notifier); } } if (legacy) { memory_region_add_eventfd(legacy_mr, legacy_addr, 2, true, n, notifier); } } else { if (modern) { if (fast_mmio) { memory_region_del_eventfd(modern_mr, modern_addr, 0, false, n, notifier); } else { memory_region_del_eventfd(modern_mr, modern_addr, 2, false, n, notifier); } if (modern_pio) { memory_region_del_eventfd(modern_notify_mr, 0, 2, true, n, notifier); } } if (legacy) { memory_region_del_eventfd(legacy_mr, legacy_addr, 2, true, n, notifier); } } return 0; } static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) { virtio_bus_start_ioeventfd(&proxy->bus); } static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) { virtio_bus_stop_ioeventfd(&proxy->bus); } 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_reset(DEVICE(proxy)); } 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_pci_reset(DEVICE(proxy)); } /* 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 = atomic_xchg(&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 MemoryRegion *virtio_address_space_lookup(VirtIOPCIProxy *proxy, hwaddr *off, int len) { int i; VirtIOPCIRegion *reg; for (i = 0; i < ARRAY_SIZE(proxy->regs); ++i) { reg = &proxy->regs[i]; if (*off >= reg->offset && *off + len <= reg->offset + reg->size) { *off -= reg->offset; return ®->mr; } } return NULL; } /* Below are generic functions to do memcpy from/to an address space, * without byteswaps, with input validation. * * As regular address_space_* APIs all do some kind of byteswap at least for * some host/target combinations, we are forced to explicitly convert to a * known-endianness integer value. * It doesn't really matter which endian format to go through, so the code * below selects the endian that causes the least amount of work on the given * host. * * Note: host pointer must be aligned. */ static void virtio_address_space_write(VirtIOPCIProxy *proxy, hwaddr addr, const uint8_t *buf, int len) { uint64_t val; MemoryRegion *mr; /* address_space_* APIs assume an aligned address. * As address is under guest control, handle illegal values. */ addr &= ~(len - 1); mr = virtio_address_space_lookup(proxy, &addr, len); if (!mr) { return; } /* Make sure caller aligned buf properly */ assert(!(((uintptr_t)buf) & (len - 1))); switch (len) { case 1: val = pci_get_byte(buf); break; case 2: val = cpu_to_le16(pci_get_word(buf)); break; case 4: val = cpu_to_le32(pci_get_long(buf)); break; default: /* As length is under guest control, handle illegal values. */ return; } memory_region_dispatch_write(mr, addr, val, len, MEMTXATTRS_UNSPECIFIED); } static void virtio_address_space_read(VirtIOPCIProxy *proxy, hwaddr addr, uint8_t *buf, int len) { uint64_t val; MemoryRegion *mr; /* address_space_* APIs assume an aligned address. * As address is under guest control, handle illegal values. */ addr &= ~(len - 1); mr = virtio_address_space_lookup(proxy, &addr, len); if (!mr) { return; } /* Make sure caller aligned buf properly */ assert(!(((uintptr_t)buf) & (len - 1))); memory_region_dispatch_read(mr, addr, &val, len, MEMTXATTRS_UNSPECIFIED); switch (len) { case 1: pci_set_byte(buf, val); break; case 2: pci_set_word(buf, le16_to_cpu(val)); break; case 4: pci_set_long(buf, le32_to_cpu(val)); break; default: /* As length is under guest control, handle illegal values. */ break; } } 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); struct virtio_pci_cfg_cap *cfg; 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); } if (proxy->config_cap && ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap, pci_cfg_data), sizeof cfg->pci_cfg_data)) { uint32_t off; uint32_t len; cfg = (void *)(proxy->pci_dev.config + proxy->config_cap); off = le32_to_cpu(cfg->cap.offset); len = le32_to_cpu(cfg->cap.length); if (len == 1 || len == 2 || len == 4) { assert(len <= sizeof cfg->pci_cfg_data); virtio_address_space_write(proxy, off, cfg->pci_cfg_data, len); } } } static uint32_t virtio_read_config(PCIDevice *pci_dev, uint32_t address, int len) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); struct virtio_pci_cfg_cap *cfg; if (proxy->config_cap && ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap, pci_cfg_data), sizeof cfg->pci_cfg_data)) { uint32_t off; uint32_t len; cfg = (void *)(proxy->pci_dev.config + proxy->config_cap); off = le32_to_cpu(cfg->cap.offset); len = le32_to_cpu(cfg->cap.length); if (len == 1 || len == 2 || len == 4) { assert(len <= sizeof cfg->pci_cfg_data); virtio_address_space_read(proxy, off, cfg->pci_cfg_data, len); } } return pci_default_read_config(pci_dev, address, len); } static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, unsigned int queue_no, unsigned int vector) { VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; int ret; if (irqfd->users == 0) { ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev); 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); return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq); } 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_gsi(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; 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; } ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector); if (ret < 0) { goto undo; } /* If guest supports masking, set up irqfd now. * Otherwise, delay until unmasked in the frontend. */ if (vdev->use_guest_notifier_mask && 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 (vdev->use_guest_notifier_mask && 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 (vdev->use_guest_notifier_mask && 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, &proxy->pci_dev); if (ret < 0) { return ret; } kvm_irqchip_commit_routes(kvm_state); } } /* If guest supports masking, irqfd is already setup, unmask it. * Otherwise, set it up now. */ if (vdev->use_guest_notifier_mask && 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 (vdev->use_guest_notifier_mask && 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) && vdev->use_guest_notifier_mask && 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_mr(DeviceState *d, int n, MemoryRegion *mr, bool assign) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); int offset; if (n >= VIRTIO_QUEUE_MAX || !virtio_pci_modern(proxy) || virtio_pci_queue_mem_mult(proxy) != memory_region_size(mr)) { return -1; } if (assign) { offset = virtio_pci_queue_mem_mult(proxy) * n; memory_region_add_subregion_overlap(&proxy->notify.mr, offset, mr, 1); } else { memory_region_del_subregion(&proxy->notify.mr, mr); } return 0; } 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 VirtioPCIDeviceTypeInfo virtio_9p_pci_info = { .base_name = TYPE_VIRTIO_9P_PCI, .generic_name = "virtio-9p-pci", .transitional_name = "virtio-9p-pci-transitional", .non_transitional_name = "virtio-9p-pci-non-transitional", .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 AddressSpace *virtio_pci_get_dma_as(DeviceState *d) { VirtIOPCIProxy *proxy = VIRTIO_PCI(d); PCIDevice *dev = &proxy->pci_dev; return pci_get_address_space(dev); } static int 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, &error_abort); assert(cap->cap_len >= sizeof *cap); memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len, cap->cap_len - PCI_CAP_FLAGS); return offset; } 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) { VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); val = (vdev->host_features & ~vdc->legacy_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_pci_reset(DEVICE(proxy)); } 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: 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]); proxy->vqs[vdev->queue_sel].enabled = 1; 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; VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent); unsigned queue = addr / virtio_pci_queue_mem_mult(proxy); if (queue < VIRTIO_QUEUE_MAX) { virtio_queue_notify(vdev, queue); } } static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr, uint64_t val, unsigned size) { VirtIODevice *vdev = opaque; unsigned queue = val; 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 = atomic_xchg(&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, }; static const MemoryRegionOps notify_pio_ops = { .read = virtio_pci_notify_read, .write = virtio_pci_notify_write_pio, .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", proxy->common.size); memory_region_init_io(&proxy->isr.mr, OBJECT(proxy), &isr_ops, proxy, "virtio-pci-isr", proxy->isr.size); memory_region_init_io(&proxy->device.mr, OBJECT(proxy), &device_ops, virtio_bus_get_device(&proxy->bus), "virtio-pci-device", proxy->device.size); memory_region_init_io(&proxy->notify.mr, OBJECT(proxy), ¬ify_ops, virtio_bus_get_device(&proxy->bus), "virtio-pci-notify", proxy->notify.size); memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy), ¬ify_pio_ops, virtio_bus_get_device(&proxy->bus), "virtio-pci-notify-pio", proxy->notify_pio.size); } static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy, VirtIOPCIRegion *region, struct virtio_pci_cap *cap, MemoryRegion *mr, uint8_t bar) { memory_region_add_subregion(mr, region->offset, ®ion->mr); cap->cfg_type = region->type; cap->bar = bar; cap->offset = cpu_to_le32(region->offset); cap->length = cpu_to_le32(region->size); virtio_pci_add_mem_cap(proxy, cap); } static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy, VirtIOPCIRegion *region, struct virtio_pci_cap *cap) { virtio_pci_modern_region_map(proxy, region, cap, &proxy->modern_bar, proxy->modern_mem_bar_idx); } static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy, VirtIOPCIRegion *region, struct virtio_pci_cap *cap) { virtio_pci_modern_region_map(proxy, region, cap, &proxy->io_bar, proxy->modern_io_bar_idx); } static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy, VirtIOPCIRegion *region) { memory_region_del_subregion(&proxy->modern_bar, ®ion->mr); } static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy, VirtIOPCIRegion *region) { memory_region_del_subregion(&proxy->io_bar, ®ion->mr); } static void virtio_pci_pre_plugged(DeviceState *d, Error **errp) { VirtIOPCIProxy *proxy = VIRTIO_PCI(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); if (virtio_pci_modern(proxy)) { virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1); } virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE); } /* 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 = virtio_pci_legacy(proxy); bool modern; bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; uint8_t *config; uint32_t size; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); /* * Virtio capabilities present without * VIRTIO_F_VERSION_1 confuses guests */ if (!proxy->ignore_backend_features && !virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) { virtio_pci_disable_modern(proxy); if (!legacy) { error_setg(errp, "Device doesn't support modern mode, and legacy" " mode is disabled"); error_append_hint(errp, "Set disable-legacy to off\n"); return; } } modern = virtio_pci_modern(proxy); config = proxy->pci_dev.config; if (proxy->class_code) { pci_config_set_class(config, proxy->class_code); } if (legacy) { if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) { error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by" " neither legacy nor transitional device"); return ; } /* * Legacy and transitional devices use specific subsystem IDs. * Note that the subsystem vendor ID (config + PCI_SUBSYSTEM_VENDOR_ID) * is set to PCI_SUBVENDOR_ID_REDHAT_QUMRANET by default. */ 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 cap = { .cap_len = sizeof cap, }; struct virtio_pci_notify_cap notify = { .cap.cap_len = sizeof notify, .notify_off_multiplier = cpu_to_le32(virtio_pci_queue_mem_mult(proxy)), }; struct virtio_pci_cfg_cap cfg = { .cap.cap_len = sizeof cfg, .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG, }; struct virtio_pci_notify_cap notify_pio = { .cap.cap_len = sizeof notify, .notify_off_multiplier = cpu_to_le32(0x0), }; struct virtio_pci_cfg_cap *cfg_mask; virtio_pci_modern_regions_init(proxy); virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap); virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap); virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap); virtio_pci_modern_mem_region_map(proxy, &proxy->notify, ¬ify.cap); if (modern_pio) { memory_region_init(&proxy->io_bar, OBJECT(proxy), "virtio-pci-io", 0x4); pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx, PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar); virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio, ¬ify_pio.cap); } pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx, PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_PREFETCH | PCI_BASE_ADDRESS_MEM_TYPE_64, &proxy->modern_bar); proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap); cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap); pci_set_byte(&cfg_mask->cap.bar, ~0x0); pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0); pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0); pci_set_long(cfg_mask->pci_cfg_data, ~0x0); } if (proxy->nvectors) { int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, proxy->msix_bar_idx, NULL); if (err) { /* Notice when a system that supports MSIx can't initialize it */ if (err != -ENOTSUP) { warn_report("unable to init msix vectors to %" PRIu32, proxy->nvectors); } proxy->nvectors = 0; } } proxy->pci_dev.config_write = virtio_write_config; proxy->pci_dev.config_read = virtio_read_config; if (legacy) { size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + virtio_bus_get_vdev_config_len(bus); size = pow2ceil(size); memory_region_init_io(&proxy->bar, OBJECT(proxy), &virtio_pci_config_ops, proxy, "virtio-pci", size); pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx, PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar); } } static void virtio_pci_device_unplugged(DeviceState *d) { VirtIOPCIProxy *proxy = VIRTIO_PCI(d); bool modern = virtio_pci_modern(proxy); bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY; virtio_pci_stop_ioeventfd(proxy); if (modern) { virtio_pci_modern_mem_region_unmap(proxy, &proxy->common); virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr); virtio_pci_modern_mem_region_unmap(proxy, &proxy->device); virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify); if (modern_pio) { virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio); } } } static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp) { VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) && !pci_bus_is_root(pci_get_bus(pci_dev)); if (kvm_enabled() && !kvm_has_many_ioeventfds()) { proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; } /* * virtio pci bar layout used by default. * subclasses can re-arrange things if needed. * * region 0 -- virtio legacy io bar * region 1 -- msi-x bar * region 4+5 -- virtio modern memory (64bit) bar * */ proxy->legacy_io_bar_idx = 0; proxy->msix_bar_idx = 1; proxy->modern_io_bar_idx = 2; proxy->modern_mem_bar_idx = 4; proxy->common.offset = 0x0; proxy->common.size = 0x1000; proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG; proxy->isr.offset = 0x1000; proxy->isr.size = 0x1000; proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG; proxy->device.offset = 0x2000; proxy->device.size = 0x1000; proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG; proxy->notify.offset = 0x3000; proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX; proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG; proxy->notify_pio.offset = 0x0; proxy->notify_pio.size = 0x4; proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG; /* subclasses can enforce modern, so do this unconditionally */ memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci", /* PCI BAR regions must be powers of 2 */ pow2ceil(proxy->notify.offset + proxy->notify.size)); if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) { proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; } if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) { error_setg(errp, "device cannot work as neither modern nor legacy mode" " is enabled"); error_append_hint(errp, "Set either disable-modern or disable-legacy" " to off\n"); return; } if (pcie_port && pci_is_express(pci_dev)) { int pos; pos = pcie_endpoint_cap_init(pci_dev, 0); assert(pos > 0); pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF, errp); if (pos < 0) { return; } pci_dev->exp.pm_cap = pos; /* * Indicates that this function complies with revision 1.2 of the * PCI Power Management Interface Specification. */ pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3); if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) { /* Init error enabling flags */ pcie_cap_deverr_init(pci_dev); } if (proxy->flags & VIRTIO_PCI_FLAG_INIT_LNKCTL) { /* Init Link Control Register */ pcie_cap_lnkctl_init(pci_dev); } if (proxy->flags & VIRTIO_PCI_FLAG_INIT_PM) { /* Init Power Management Control Register */ pci_set_word(pci_dev->wmask + pos + PCI_PM_CTRL, PCI_PM_CTRL_STATE_MASK); } if (proxy->flags & VIRTIO_PCI_FLAG_ATS) { pcie_ats_init(pci_dev, 256); } } else { /* * make future invocations of pci_is_express() return false * and pci_config_size() return PCI_CONFIG_SPACE_SIZE. */ pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS; } virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy); if (k->realize) { k->realize(proxy, 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); PCIDevice *dev = PCI_DEVICE(qdev); int i; virtio_pci_stop_ioeventfd(proxy); virtio_bus_reset(bus); msix_unuse_all_vectors(&proxy->pci_dev); for (i = 0; i < VIRTIO_QUEUE_MAX; i++) { proxy->vqs[i].enabled = 0; proxy->vqs[i].num = 0; proxy->vqs[i].desc[0] = proxy->vqs[i].desc[1] = 0; proxy->vqs[i].avail[0] = proxy->vqs[i].avail[1] = 0; proxy->vqs[i].used[0] = proxy->vqs[i].used[1] = 0; } if (pci_is_express(dev)) { pcie_cap_deverr_reset(dev); pcie_cap_lnkctl_reset(dev); pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0); } } 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("migrate-extra", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true), DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false), DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false), DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false), DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy, ignore_backend_features, false), DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_ATS_BIT, false), DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true), DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true), DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_INIT_PM_BIT, true), DEFINE_PROP_END_OF_LIST(), }; static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp) { VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev); VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); PCIDevice *pci_dev = &proxy->pci_dev; if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) && virtio_pci_modern(proxy)) { pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; } vpciklass->parent_dc_realize(qdev, errp); } static void virtio_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); VirtioPCIClass *vpciklass = VIRTIO_PCI_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; device_class_set_parent_realize(dc, virtio_pci_dc_realize, &vpciklass->parent_dc_realize); 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, }; static Property virtio_pci_generic_properties[] = { DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy, ON_OFF_AUTO_AUTO), DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false), DEFINE_PROP_END_OF_LIST(), }; static void virtio_pci_base_class_init(ObjectClass *klass, void *data) { const VirtioPCIDeviceTypeInfo *t = data; if (t->class_init) { t->class_init(klass, NULL); } } static void virtio_pci_generic_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->props = virtio_pci_generic_properties; } /* Used when the generic type and the base type is the same */ static void virtio_pci_generic_base_class_init(ObjectClass *klass, void *data) { virtio_pci_base_class_init(klass, data); virtio_pci_generic_class_init(klass, NULL); } static void virtio_pci_transitional_instance_init(Object *obj) { VirtIOPCIProxy *proxy = VIRTIO_PCI(obj); proxy->disable_legacy = ON_OFF_AUTO_OFF; proxy->disable_modern = false; } static void virtio_pci_non_transitional_instance_init(Object *obj) { VirtIOPCIProxy *proxy = VIRTIO_PCI(obj); proxy->disable_legacy = ON_OFF_AUTO_ON; proxy->disable_modern = false; } void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t) { TypeInfo base_type_info = { .name = t->base_name, .parent = t->parent ? t->parent : TYPE_VIRTIO_PCI, .instance_size = t->instance_size, .instance_init = t->instance_init, .class_init = virtio_pci_base_class_init, .class_data = (void *)t, .abstract = true, }; TypeInfo generic_type_info = { .name = t->generic_name, .parent = base_type_info.name, .class_init = virtio_pci_generic_class_init, .interfaces = (InterfaceInfo[]) { { INTERFACE_PCIE_DEVICE }, { INTERFACE_CONVENTIONAL_PCI_DEVICE }, { } }, }; if (!base_type_info.name) { /* No base type -> register a single generic device type */ base_type_info.name = t->generic_name; base_type_info.class_init = virtio_pci_generic_base_class_init; base_type_info.interfaces = generic_type_info.interfaces; base_type_info.abstract = false; generic_type_info.name = NULL; assert(!t->non_transitional_name); assert(!t->transitional_name); } type_register(&base_type_info); if (generic_type_info.name) { type_register(&generic_type_info); } if (t->non_transitional_name) { const TypeInfo non_transitional_type_info = { .name = t->non_transitional_name, .parent = base_type_info.name, .instance_init = virtio_pci_non_transitional_instance_init, .interfaces = (InterfaceInfo[]) { { INTERFACE_PCIE_DEVICE }, { INTERFACE_CONVENTIONAL_PCI_DEVICE }, { } }, }; type_register(&non_transitional_type_info); } if (t->transitional_name) { const TypeInfo transitional_type_info = { .name = t->transitional_name, .parent = base_type_info.name, .instance_init = virtio_pci_transitional_instance_init, .interfaces = (InterfaceInfo[]) { /* * Transitional virtio devices work only as Conventional PCI * devices because they require PIO ports. */ { INTERFACE_CONVENTIONAL_PCI_DEVICE }, { } }, }; type_register(&transitional_type_info); } } /* 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, DEV_NVECTORS_UNSPECIFIED), 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); if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { vpci_dev->nvectors = dev->vdev.conf.num_queues + 1; } 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, "bootindex", OBJECT(&dev->vdev), "bootindex", &error_abort); } static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = { .base_name = TYPE_VIRTIO_BLK_PCI, .generic_name = "virtio-blk-pci", .transitional_name = "virtio-blk-pci-transitional", .non_transitional_name = "virtio-blk-pci-non-transitional", .instance_size = sizeof(VirtIOBlkPCI), .instance_init = virtio_blk_pci_instance_init, .class_init = virtio_blk_pci_class_init, }; #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) /* vhost-user-blk */ static Property vhost_user_blk_pci_properties[] = { DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED), DEFINE_PROP_END_OF_LIST(), }; static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { vpci_dev->nvectors = dev->vdev.num_queues + 1; } qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } static void vhost_user_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 = vhost_user_blk_pci_properties; k->realize = vhost_user_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 vhost_user_blk_pci_instance_init(Object *obj) { VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VHOST_USER_BLK); object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), "bootindex", &error_abort); } static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = { .base_name = TYPE_VHOST_USER_BLK_PCI, .generic_name = "vhost-user-blk-pci", .transitional_name = "vhost-user-blk-pci-transitional", .non_transitional_name = "vhost-user-blk-pci-non-transitional", .instance_size = sizeof(VHostUserBlkPCI), .instance_init = vhost_user_blk_pci_instance_init, .class_init = vhost_user_blk_pci_class_init, }; #endif /* 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); } static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = { .base_name = TYPE_VIRTIO_SCSI_PCI, .generic_name = "virtio-scsi-pci", .transitional_name = "virtio-scsi-pci-transitional", .non_transitional_name = "virtio-scsi-pci-non-transitional", .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 VirtioPCIDeviceTypeInfo vhost_scsi_pci_info = { .base_name = TYPE_VHOST_SCSI_PCI, .generic_name = "vhost-scsi-pci", .transitional_name = "vhost-scsi-pci-transitional", .non_transitional_name = "vhost-scsi-pci-non-transitional", .instance_size = sizeof(VHostSCSIPCI), .instance_init = vhost_scsi_pci_instance_init, .class_init = vhost_scsi_pci_class_init, }; #endif #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) /* vhost-user-scsi-pci */ static Property vhost_user_scsi_pci_properties[] = { DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED), DEFINE_PROP_END_OF_LIST(), }; static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VHostUserSCSIPCI *dev = VHOST_USER_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_user_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_user_scsi_pci_realize; set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); dc->props = vhost_user_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_user_scsi_pci_instance_init(Object *obj) { VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj); virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), TYPE_VHOST_USER_SCSI); object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), "bootindex", &error_abort); } static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = { .base_name = TYPE_VHOST_USER_SCSI_PCI, .generic_name = "vhost-user-scsi-pci", .transitional_name = "vhost-user-scsi-pci-transitional", .non_transitional_name = "vhost-user-scsi-pci-non-transitional", .instance_size = sizeof(VHostUserSCSIPCI), .instance_init = vhost_user_scsi_pci_instance_init, .class_init = vhost_user_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 VirtioPCIDeviceTypeInfo virtio_balloon_pci_info = { .base_name = TYPE_VIRTIO_BALLOON_PCI, .generic_name = "virtio-balloon-pci", .transitional_name = "virtio-balloon-pci-transitional", .non_transitional_name = "virtio-balloon-pci-non-transitional", .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 VirtioPCIDeviceTypeInfo virtio_serial_pci_info = { .base_name = TYPE_VIRTIO_SERIAL_PCI, .generic_name = "virtio-serial-pci", .transitional_name = "virtio-serial-pci-transitional", .non_transitional_name = "virtio-serial-pci-non-transitional", .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, true), 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 VirtioPCIDeviceTypeInfo virtio_net_pci_info = { .base_name = TYPE_VIRTIO_NET_PCI, .generic_name = "virtio-net-pci", .transitional_name = "virtio-net-pci-transitional", .non_transitional_name = "virtio-net-pci-non-transitional", .instance_size = sizeof(VirtIONetPCI), .instance_init = virtio_net_pci_instance_init, .class_init = virtio_net_pci_class_init, }; /* virtio-rng-pci */ 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); 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); } static const VirtioPCIDeviceTypeInfo virtio_rng_pci_info = { .base_name = TYPE_VIRTIO_RNG_PCI, .generic_name = "virtio-rng-pci", .transitional_name = "virtio-rng-pci-transitional", .non_transitional_name = "virtio-rng-pci-non-transitional", .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->save_extra_state = virtio_pci_save_extra_state; k->load_extra_state = virtio_pci_load_extra_state; k->has_extra_state = virtio_pci_has_extra_state; k->query_guest_notifiers = virtio_pci_query_guest_notifiers; k->set_guest_notifiers = virtio_pci_set_guest_notifiers; k->set_host_notifier_mr = virtio_pci_set_host_notifier_mr; k->vmstate_change = virtio_pci_vmstate_change; k->pre_plugged = virtio_pci_pre_plugged; k->device_plugged = virtio_pci_device_plugged; k->device_unplugged = virtio_pci_device_unplugged; k->query_nvectors = virtio_pci_query_nvectors; k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled; k->ioeventfd_assign = virtio_pci_ioeventfd_assign; k->get_dma_as = virtio_pci_get_dma_as; } 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) { /* Base types: */ type_register_static(&virtio_pci_bus_info); type_register_static(&virtio_pci_info); /* Implementations: */ virtio_pci_types_register(&virtio_rng_pci_info); #ifdef CONFIG_VIRTFS virtio_pci_types_register(&virtio_9p_pci_info); #endif virtio_pci_types_register(&virtio_blk_pci_info); #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) virtio_pci_types_register(&vhost_user_blk_pci_info); #endif virtio_pci_types_register(&virtio_scsi_pci_info); virtio_pci_types_register(&virtio_balloon_pci_info); virtio_pci_types_register(&virtio_serial_pci_info); virtio_pci_types_register(&virtio_net_pci_info); #ifdef CONFIG_VHOST_SCSI virtio_pci_types_register(&vhost_scsi_pci_info); #endif #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) virtio_pci_types_register(&vhost_user_scsi_pci_info); #endif } type_init(virtio_pci_register_types)