| /* |
| * Virtio PCI Bindings |
| * |
| * Copyright IBM, Corp. 2007 |
| * Copyright (c) 2009 CodeSourcery |
| * |
| * Authors: |
| * Anthony Liguori <aliguori@us.ibm.com> |
| * Paul Brook <paul@codesourcery.com> |
| * |
| * 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 "exec/memop.h" |
| #include "standard-headers/linux/virtio_pci.h" |
| #include "hw/virtio/virtio.h" |
| #include "migration/qemu-file-types.h" |
| #include "hw/pci/pci.h" |
| #include "hw/pci/pci_bus.h" |
| #include "hw/qdev-properties.h" |
| #include "qapi/error.h" |
| #include "qemu/error-report.h" |
| #include "qemu/module.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 = pci_get_word(buf); |
| break; |
| case 4: |
| val = pci_get_long(buf); |
| break; |
| default: |
| /* As length is under guest control, handle illegal values. */ |
| return; |
| } |
| memory_region_dispatch_write(mr, addr, val, size_memop(len) | MO_LE, |
| 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, size_memop(len) | MO_LE, |
| MEMTXATTRS_UNSPECIFIED); |
| switch (len) { |
| case 1: |
| pci_set_byte(buf, val); |
| break; |
| case 2: |
| pci_set_word(buf, val); |
| break; |
| case 4: |
| pci_set_long(buf, 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 = VIRTIO_PCI(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 (proxy->flags & VIRTIO_PCI_FLAG_INIT_FLR) { |
| pcie_cap_flr_write_config(pci_dev, address, val, len); |
| } |
| |
| if (range_covers_byte(address, len, PCI_COMMAND)) { |
| if (!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
| virtio_set_disabled(vdev, true); |
| virtio_pci_stop_ioeventfd(proxy); |
| virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); |
| } else { |
| virtio_set_disabled(vdev, false); |
| } |
| } |
| |
| 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 = VIRTIO_PCI(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); |
| } |
| } |
| |
| /* |
| * 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; |
| virtio_queue_set_num(vdev, vdev->queue_sel, |
| proxy->vqs[vdev->queue_sel].num); |
| 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); |
| } |
| |
| if (proxy->flags & VIRTIO_PCI_FLAG_INIT_FLR) { |
| /* Set Function Level Reset capability bit */ |
| pcie_cap_flr_init(pci_dev); |
| } |
| } 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_BIT("x-pcie-flr-init", VirtIOPCIProxy, flags, |
| VIRTIO_PCI_FLAG_INIT_FLR_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); |
| |
| device_class_set_props(dc, 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); |
| |
| device_class_set_props(dc, virtio_pci_generic_properties); |
| } |
| |
| 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) |
| { |
| char *base_name = NULL; |
| 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_size = t->class_size, |
| .abstract = true, |
| .interfaces = t->interfaces, |
| }; |
| 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 */ |
| /* use intermediate %s-base-type to add generic device props */ |
| base_name = g_strdup_printf("%s-base-type", t->generic_name); |
| base_type_info.name = base_name; |
| base_type_info.class_init = virtio_pci_generic_class_init; |
| |
| generic_type_info.parent = base_name; |
| generic_type_info.class_init = virtio_pci_base_class_init; |
| generic_type_info.class_data = (void *)t; |
| |
| assert(!t->non_transitional_name); |
| assert(!t->transitional_name); |
| } else { |
| base_type_info.class_init = virtio_pci_base_class_init; |
| base_type_info.class_data = (void *)t; |
| } |
| |
| 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); |
| } |
| g_free(base_name); |
| } |
| |
| /* 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); |
| } |
| |
| type_init(virtio_pci_register_types) |
| |