| /* |
| * 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 <inttypes.h> |
| |
| #include "hw/virtio/virtio.h" |
| #include "hw/virtio/virtio-blk.h" |
| #include "hw/virtio/virtio-net.h" |
| #include "hw/virtio/virtio-serial.h" |
| #include "hw/virtio/virtio-scsi.h" |
| #include "hw/virtio/virtio-balloon.h" |
| #include "hw/pci/pci.h" |
| #include "qemu/error-report.h" |
| #include "hw/pci/msi.h" |
| #include "hw/pci/msix.h" |
| #include "hw/loader.h" |
| #include "sysemu/kvm.h" |
| #include "sysemu/blockdev.h" |
| #include "virtio-pci.h" |
| #include "qemu/range.h" |
| #include "hw/virtio/virtio-bus.h" |
| #include "qapi/visitor.h" |
| |
| /* from Linux's linux/virtio_pci.h */ |
| |
| /* A 32-bit r/o bitmask of the features supported by the host */ |
| #define VIRTIO_PCI_HOST_FEATURES 0 |
| |
| /* A 32-bit r/w bitmask of features activated by the guest */ |
| #define VIRTIO_PCI_GUEST_FEATURES 4 |
| |
| /* A 32-bit r/w PFN for the currently selected queue */ |
| #define VIRTIO_PCI_QUEUE_PFN 8 |
| |
| /* A 16-bit r/o queue size for the currently selected queue */ |
| #define VIRTIO_PCI_QUEUE_NUM 12 |
| |
| /* A 16-bit r/w queue selector */ |
| #define VIRTIO_PCI_QUEUE_SEL 14 |
| |
| /* A 16-bit r/w queue notifier */ |
| #define VIRTIO_PCI_QUEUE_NOTIFY 16 |
| |
| /* An 8-bit device status register. */ |
| #define VIRTIO_PCI_STATUS 18 |
| |
| /* An 8-bit r/o interrupt status register. Reading the value will return the |
| * current contents of the ISR and will also clear it. This is effectively |
| * a read-and-acknowledge. */ |
| #define VIRTIO_PCI_ISR 19 |
| |
| /* MSI-X registers: only enabled if MSI-X is enabled. */ |
| /* A 16-bit vector for configuration changes. */ |
| #define VIRTIO_MSI_CONFIG_VECTOR 20 |
| /* A 16-bit vector for selected queue notifications. */ |
| #define VIRTIO_MSI_QUEUE_VECTOR 22 |
| |
| /* Config space size */ |
| #define VIRTIO_PCI_CONFIG_NOMSI 20 |
| #define VIRTIO_PCI_CONFIG_MSI 24 |
| #define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \ |
| VIRTIO_PCI_CONFIG_MSI : \ |
| VIRTIO_PCI_CONFIG_NOMSI) |
| |
| /* The remaining space is defined by each driver as the per-driver |
| * configuration space */ |
| #define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \ |
| VIRTIO_PCI_CONFIG_MSI : \ |
| VIRTIO_PCI_CONFIG_NOMSI) |
| |
| /* How many bits to shift physical queue address written to QUEUE_PFN. |
| * 12 is historical, and due to x86 page size. */ |
| #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 |
| |
| /* Flags track per-device state like workarounds for quirks in older guests. */ |
| #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0) |
| |
| /* HACK for virtio to determine if it's running a big endian guest */ |
| bool virtio_is_big_endian(void); |
| |
| static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, |
| VirtIOPCIProxy *dev); |
| |
| /* virtio device */ |
| /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */ |
| static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d) |
| { |
| return container_of(d, VirtIOPCIProxy, pci_dev.qdev); |
| } |
| |
| /* DeviceState to VirtIOPCIProxy. Note: used on datapath, |
| * be careful and test performance if you change this. |
| */ |
| static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d) |
| { |
| return container_of(d, VirtIOPCIProxy, pci_dev.qdev); |
| } |
| |
| static void virtio_pci_notify(DeviceState *d, uint16_t vector) |
| { |
| VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d); |
| if (msix_enabled(&proxy->pci_dev)) |
| msix_notify(&proxy->pci_dev, vector); |
| else |
| qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1); |
| } |
| |
| static void virtio_pci_save_config(DeviceState *d, QEMUFile *f) |
| { |
| VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
| pci_device_save(&proxy->pci_dev, f); |
| msix_save(&proxy->pci_dev, f); |
| if (msix_present(&proxy->pci_dev)) |
| qemu_put_be16(f, proxy->vdev->config_vector); |
| } |
| |
| static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f) |
| { |
| VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
| if (msix_present(&proxy->pci_dev)) |
| qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n)); |
| } |
| |
| static int virtio_pci_load_config(DeviceState *d, QEMUFile *f) |
| { |
| VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
| int ret; |
| ret = pci_device_load(&proxy->pci_dev, f); |
| if (ret) { |
| return ret; |
| } |
| msix_unuse_all_vectors(&proxy->pci_dev); |
| msix_load(&proxy->pci_dev, f); |
| if (msix_present(&proxy->pci_dev)) { |
| qemu_get_be16s(f, &proxy->vdev->config_vector); |
| } else { |
| proxy->vdev->config_vector = VIRTIO_NO_VECTOR; |
| } |
| if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) { |
| return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector); |
| } |
| return 0; |
| } |
| |
| static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) |
| { |
| VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
| uint16_t vector; |
| if (msix_present(&proxy->pci_dev)) { |
| qemu_get_be16s(f, &vector); |
| } else { |
| vector = VIRTIO_NO_VECTOR; |
| } |
| virtio_queue_set_vector(proxy->vdev, n, vector); |
| if (vector != VIRTIO_NO_VECTOR) { |
| return msix_vector_use(&proxy->pci_dev, vector); |
| } |
| return 0; |
| } |
| |
| static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, |
| int n, bool assign, bool set_handler) |
| { |
| VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
| EventNotifier *notifier = virtio_queue_get_host_notifier(vq); |
| int r = 0; |
| |
| if (assign) { |
| r = event_notifier_init(notifier, 1); |
| if (r < 0) { |
| error_report("%s: unable to init event notifier: %d", |
| __func__, r); |
| return r; |
| } |
| virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler); |
| memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, |
| true, n, notifier); |
| } else { |
| memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2, |
| true, n, notifier); |
| virtio_queue_set_host_notifier_fd_handler(vq, false, false); |
| event_notifier_cleanup(notifier); |
| } |
| return r; |
| } |
| |
| static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) |
| { |
| int n, r; |
| |
| if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) || |
| proxy->ioeventfd_disabled || |
| proxy->ioeventfd_started) { |
| return; |
| } |
| |
| for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
| if (!virtio_queue_get_num(proxy->vdev, n)) { |
| continue; |
| } |
| |
| r = virtio_pci_set_host_notifier_internal(proxy, n, true, true); |
| if (r < 0) { |
| goto assign_error; |
| } |
| } |
| proxy->ioeventfd_started = true; |
| return; |
| |
| assign_error: |
| while (--n >= 0) { |
| if (!virtio_queue_get_num(proxy->vdev, n)) { |
| continue; |
| } |
| |
| r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); |
| assert(r >= 0); |
| } |
| proxy->ioeventfd_started = false; |
| error_report("%s: failed. Fallback to a userspace (slower).", __func__); |
| } |
| |
| static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) |
| { |
| int r; |
| int n; |
| |
| if (!proxy->ioeventfd_started) { |
| return; |
| } |
| |
| for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
| if (!virtio_queue_get_num(proxy->vdev, n)) { |
| continue; |
| } |
| |
| r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); |
| assert(r >= 0); |
| } |
| proxy->ioeventfd_started = false; |
| } |
| |
| static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
| { |
| VirtIOPCIProxy *proxy = opaque; |
| VirtIODevice *vdev = proxy->vdev; |
| hwaddr pa; |
| |
| switch (addr) { |
| case VIRTIO_PCI_GUEST_FEATURES: |
| /* Guest does not negotiate properly? We have to assume nothing. */ |
| if (val & (1 << VIRTIO_F_BAD_FEATURE)) { |
| val = virtio_bus_get_vdev_bad_features(&proxy->bus); |
| } |
| virtio_set_features(vdev, val); |
| break; |
| case VIRTIO_PCI_QUEUE_PFN: |
| pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
| if (pa == 0) { |
| virtio_pci_stop_ioeventfd(proxy); |
| virtio_reset(proxy->vdev); |
| msix_unuse_all_vectors(&proxy->pci_dev); |
| } |
| else |
| virtio_queue_set_addr(vdev, vdev->queue_sel, pa); |
| break; |
| case VIRTIO_PCI_QUEUE_SEL: |
| if (val < VIRTIO_PCI_QUEUE_MAX) |
| vdev->queue_sel = val; |
| break; |
| case VIRTIO_PCI_QUEUE_NOTIFY: |
| if (val < VIRTIO_PCI_QUEUE_MAX) { |
| virtio_queue_notify(vdev, val); |
| } |
| break; |
| case VIRTIO_PCI_STATUS: |
| if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) { |
| virtio_pci_stop_ioeventfd(proxy); |
| } |
| |
| virtio_set_status(vdev, val & 0xFF); |
| |
| if (val & VIRTIO_CONFIG_S_DRIVER_OK) { |
| virtio_pci_start_ioeventfd(proxy); |
| } |
| |
| if (vdev->status == 0) { |
| virtio_reset(proxy->vdev); |
| msix_unuse_all_vectors(&proxy->pci_dev); |
| } |
| |
| /* Linux before 2.6.34 sets the device as OK without enabling |
| the PCI device bus master bit. In this case we need to disable |
| some safety checks. */ |
| if ((val & VIRTIO_CONFIG_S_DRIVER_OK) && |
| !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
| proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
| } |
| break; |
| case VIRTIO_MSI_CONFIG_VECTOR: |
| msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); |
| /* Make it possible for guest to discover an error took place. */ |
| if (msix_vector_use(&proxy->pci_dev, val) < 0) |
| val = VIRTIO_NO_VECTOR; |
| vdev->config_vector = val; |
| break; |
| case VIRTIO_MSI_QUEUE_VECTOR: |
| msix_vector_unuse(&proxy->pci_dev, |
| virtio_queue_vector(vdev, vdev->queue_sel)); |
| /* Make it possible for guest to discover an error took place. */ |
| if (msix_vector_use(&proxy->pci_dev, val) < 0) |
| val = VIRTIO_NO_VECTOR; |
| virtio_queue_set_vector(vdev, vdev->queue_sel, val); |
| break; |
| default: |
| error_report("%s: unexpected address 0x%x value 0x%x", |
| __func__, addr, val); |
| break; |
| } |
| } |
| |
| static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) |
| { |
| VirtIODevice *vdev = proxy->vdev; |
| uint32_t ret = 0xFFFFFFFF; |
| |
| switch (addr) { |
| case VIRTIO_PCI_HOST_FEATURES: |
| ret = proxy->host_features; |
| break; |
| case VIRTIO_PCI_GUEST_FEATURES: |
| ret = vdev->guest_features; |
| break; |
| case VIRTIO_PCI_QUEUE_PFN: |
| ret = virtio_queue_get_addr(vdev, vdev->queue_sel) |
| >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
| break; |
| case VIRTIO_PCI_QUEUE_NUM: |
| ret = virtio_queue_get_num(vdev, vdev->queue_sel); |
| break; |
| case VIRTIO_PCI_QUEUE_SEL: |
| ret = vdev->queue_sel; |
| break; |
| case VIRTIO_PCI_STATUS: |
| ret = vdev->status; |
| break; |
| case VIRTIO_PCI_ISR: |
| /* reading from the ISR also clears it. */ |
| ret = vdev->isr; |
| vdev->isr = 0; |
| qemu_set_irq(proxy->pci_dev.irq[0], 0); |
| break; |
| case VIRTIO_MSI_CONFIG_VECTOR: |
| ret = vdev->config_vector; |
| break; |
| case VIRTIO_MSI_QUEUE_VECTOR: |
| ret = virtio_queue_vector(vdev, vdev->queue_sel); |
| break; |
| default: |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, |
| unsigned size) |
| { |
| VirtIOPCIProxy *proxy = opaque; |
| uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
| uint64_t val = 0; |
| if (addr < config) { |
| return virtio_ioport_read(proxy, addr); |
| } |
| addr -= config; |
| |
| switch (size) { |
| case 1: |
| val = virtio_config_readb(proxy->vdev, addr); |
| break; |
| case 2: |
| val = virtio_config_readw(proxy->vdev, addr); |
| if (virtio_is_big_endian()) { |
| val = bswap16(val); |
| } |
| break; |
| case 4: |
| val = virtio_config_readl(proxy->vdev, addr); |
| if (virtio_is_big_endian()) { |
| val = bswap32(val); |
| } |
| break; |
| } |
| return val; |
| } |
| |
| static void virtio_pci_config_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned size) |
| { |
| VirtIOPCIProxy *proxy = opaque; |
| uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
| if (addr < config) { |
| virtio_ioport_write(proxy, addr, val); |
| return; |
| } |
| addr -= config; |
| /* |
| * Virtio-PCI is odd. Ioports are LE but config space is target native |
| * endian. |
| */ |
| switch (size) { |
| case 1: |
| virtio_config_writeb(proxy->vdev, addr, val); |
| break; |
| case 2: |
| if (virtio_is_big_endian()) { |
| val = bswap16(val); |
| } |
| virtio_config_writew(proxy->vdev, addr, val); |
| break; |
| case 4: |
| if (virtio_is_big_endian()) { |
| val = bswap32(val); |
| } |
| virtio_config_writel(proxy->vdev, addr, val); |
| break; |
| } |
| } |
| |
| static const MemoryRegionOps virtio_pci_config_ops = { |
| .read = virtio_pci_config_read, |
| .write = virtio_pci_config_write, |
| .impl = { |
| .min_access_size = 1, |
| .max_access_size = 4, |
| }, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| }; |
| |
| static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, |
| uint32_t val, int len) |
| { |
| VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| |
| pci_default_write_config(pci_dev, address, val, len); |
| |
| if (range_covers_byte(address, len, PCI_COMMAND) && |
| !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && |
| !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { |
| virtio_pci_stop_ioeventfd(proxy); |
| virtio_set_status(proxy->vdev, |
| proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); |
| } |
| } |
| |
| static unsigned virtio_pci_get_features(DeviceState *d) |
| { |
| VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
| return proxy->host_features; |
| } |
| |
| static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, |
| unsigned int queue_no, |
| unsigned int vector, |
| MSIMessage msg) |
| { |
| VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
| int ret; |
| |
| if (irqfd->users == 0) { |
| ret = kvm_irqchip_add_msi_route(kvm_state, msg); |
| if (ret < 0) { |
| return ret; |
| } |
| irqfd->virq = ret; |
| } |
| irqfd->users++; |
| return 0; |
| } |
| |
| static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, |
| unsigned int vector) |
| { |
| VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
| if (--irqfd->users == 0) { |
| kvm_irqchip_release_virq(kvm_state, irqfd->virq); |
| } |
| } |
| |
| static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, |
| unsigned int queue_no, |
| unsigned int vector) |
| { |
| VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
| VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
| EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
| int ret; |
| ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, NULL, irqfd->virq); |
| return ret; |
| } |
| |
| static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, |
| unsigned int queue_no, |
| unsigned int vector) |
| { |
| VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
| EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
| VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
| int ret; |
| |
| ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); |
| assert(ret == 0); |
| } |
| |
| static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) |
| { |
| PCIDevice *dev = &proxy->pci_dev; |
| VirtIODevice *vdev = proxy->vdev; |
| VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); |
| unsigned int vector; |
| int ret, queue_no; |
| MSIMessage msg; |
| |
| for (queue_no = 0; queue_no < nvqs; queue_no++) { |
| if (!virtio_queue_get_num(vdev, queue_no)) { |
| break; |
| } |
| vector = virtio_queue_vector(vdev, queue_no); |
| if (vector >= msix_nr_vectors_allocated(dev)) { |
| continue; |
| } |
| msg = msix_get_message(dev, vector); |
| ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); |
| if (ret < 0) { |
| goto undo; |
| } |
| /* If guest supports masking, set up irqfd now. |
| * Otherwise, delay until unmasked in the frontend. |
| */ |
| if (k->guest_notifier_mask) { |
| ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); |
| if (ret < 0) { |
| kvm_virtio_pci_vq_vector_release(proxy, vector); |
| goto undo; |
| } |
| } |
| } |
| return 0; |
| |
| undo: |
| while (--queue_no >= 0) { |
| vector = virtio_queue_vector(vdev, queue_no); |
| if (vector >= msix_nr_vectors_allocated(dev)) { |
| continue; |
| } |
| if (k->guest_notifier_mask) { |
| kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); |
| } |
| kvm_virtio_pci_vq_vector_release(proxy, vector); |
| } |
| return ret; |
| } |
| |
| static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) |
| { |
| PCIDevice *dev = &proxy->pci_dev; |
| VirtIODevice *vdev = proxy->vdev; |
| unsigned int vector; |
| int queue_no; |
| VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); |
| |
| for (queue_no = 0; queue_no < nvqs; queue_no++) { |
| if (!virtio_queue_get_num(vdev, queue_no)) { |
| break; |
| } |
| vector = virtio_queue_vector(vdev, queue_no); |
| if (vector >= msix_nr_vectors_allocated(dev)) { |
| continue; |
| } |
| /* If guest supports masking, clean up irqfd now. |
| * Otherwise, it was cleaned when masked in the frontend. |
| */ |
| if (k->guest_notifier_mask) { |
| kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); |
| } |
| kvm_virtio_pci_vq_vector_release(proxy, vector); |
| } |
| } |
| |
| static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, |
| unsigned int queue_no, |
| unsigned int vector, |
| MSIMessage msg) |
| { |
| VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); |
| VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
| EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
| VirtIOIRQFD *irqfd; |
| int ret = 0; |
| |
| if (proxy->vector_irqfd) { |
| irqfd = &proxy->vector_irqfd[vector]; |
| if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) { |
| ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| } |
| |
| /* If guest supports masking, irqfd is already setup, unmask it. |
| * Otherwise, set it up now. |
| */ |
| if (k->guest_notifier_mask) { |
| k->guest_notifier_mask(proxy->vdev, queue_no, false); |
| /* Test after unmasking to avoid losing events. */ |
| if (k->guest_notifier_pending && |
| k->guest_notifier_pending(proxy->vdev, queue_no)) { |
| event_notifier_set(n); |
| } |
| } else { |
| ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); |
| } |
| return ret; |
| } |
| |
| static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, |
| unsigned int queue_no, |
| unsigned int vector) |
| { |
| VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); |
| |
| /* If guest supports masking, keep irqfd but mask it. |
| * Otherwise, clean it up now. |
| */ |
| if (k->guest_notifier_mask) { |
| k->guest_notifier_mask(proxy->vdev, queue_no, true); |
| } else { |
| kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); |
| } |
| } |
| |
| static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, |
| MSIMessage msg) |
| { |
| VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
| VirtIODevice *vdev = proxy->vdev; |
| int ret, queue_no; |
| |
| for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { |
| if (!virtio_queue_get_num(vdev, queue_no)) { |
| break; |
| } |
| if (virtio_queue_vector(vdev, queue_no) != vector) { |
| continue; |
| } |
| ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg); |
| if (ret < 0) { |
| goto undo; |
| } |
| } |
| return 0; |
| |
| undo: |
| while (--queue_no >= 0) { |
| if (virtio_queue_vector(vdev, queue_no) != vector) { |
| continue; |
| } |
| virtio_pci_vq_vector_mask(proxy, queue_no, vector); |
| } |
| return ret; |
| } |
| |
| static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) |
| { |
| VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
| VirtIODevice *vdev = proxy->vdev; |
| int queue_no; |
| |
| for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { |
| if (!virtio_queue_get_num(vdev, queue_no)) { |
| break; |
| } |
| if (virtio_queue_vector(vdev, queue_no) != vector) { |
| continue; |
| } |
| virtio_pci_vq_vector_mask(proxy, queue_no, vector); |
| } |
| } |
| |
| static void virtio_pci_vector_poll(PCIDevice *dev, |
| unsigned int vector_start, |
| unsigned int vector_end) |
| { |
| VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
| VirtIODevice *vdev = proxy->vdev; |
| 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); |
| VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(proxy->vdev); |
| VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
| EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); |
| |
| if (assign) { |
| int r = event_notifier_init(notifier, 0); |
| if (r < 0) { |
| return r; |
| } |
| virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); |
| } else { |
| virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); |
| event_notifier_cleanup(notifier); |
| } |
| |
| if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) { |
| vdc->guest_notifier_mask(proxy->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 = proxy->vdev; |
| 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_PCI_QUEUE_MAX); |
| |
| /* When deassigning, pass a consistent nvqs value |
| * to avoid leaking notifiers. |
| */ |
| assert(assign || nvqs == proxy->nvqs_with_notifiers); |
| |
| proxy->nvqs_with_notifiers = nvqs; |
| |
| /* Must unset vector notifier while guest notifier is still assigned */ |
| if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) { |
| msix_unset_vector_notifiers(&proxy->pci_dev); |
| if (proxy->vector_irqfd) { |
| kvm_virtio_pci_vector_release(proxy, nvqs); |
| g_free(proxy->vector_irqfd); |
| proxy->vector_irqfd = NULL; |
| } |
| } |
| |
| for (n = 0; n < nvqs; n++) { |
| if (!virtio_queue_get_num(vdev, n)) { |
| break; |
| } |
| |
| r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd); |
| if (r < 0) { |
| goto assign_error; |
| } |
| } |
| |
| /* Must set vector notifier after guest notifier has been assigned */ |
| if ((with_irqfd || k->guest_notifier_mask) && assign) { |
| if (with_irqfd) { |
| proxy->vector_irqfd = |
| g_malloc0(sizeof(*proxy->vector_irqfd) * |
| msix_nr_vectors_allocated(&proxy->pci_dev)); |
| r = kvm_virtio_pci_vector_use(proxy, nvqs); |
| if (r < 0) { |
| goto assign_error; |
| } |
| } |
| r = msix_set_vector_notifiers(&proxy->pci_dev, |
| virtio_pci_vector_unmask, |
| virtio_pci_vector_mask, |
| virtio_pci_vector_poll); |
| if (r < 0) { |
| goto notifiers_error; |
| } |
| } |
| |
| return 0; |
| |
| notifiers_error: |
| if (with_irqfd) { |
| assert(assign); |
| kvm_virtio_pci_vector_release(proxy, nvqs); |
| } |
| |
| assign_error: |
| /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */ |
| assert(assign); |
| while (--n >= 0) { |
| virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); |
| } |
| return r; |
| } |
| |
| static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) |
| { |
| VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
| |
| /* Stop using ioeventfd for virtqueue kick if the device starts using host |
| * notifiers. This makes it easy to avoid stepping on each others' toes. |
| */ |
| proxy->ioeventfd_disabled = assign; |
| if (assign) { |
| virtio_pci_stop_ioeventfd(proxy); |
| } |
| /* We don't need to start here: it's not needed because backend |
| * currently only stops on status change away from ok, |
| * reset, vmstop and such. If we do add code to start here, |
| * need to check vmstate, device state etc. */ |
| return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); |
| } |
| |
| static void virtio_pci_vmstate_change(DeviceState *d, bool running) |
| { |
| VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
| |
| if (running) { |
| /* Try to find out if the guest has bus master disabled, but is |
| in ready state. Then we have a buggy guest OS. */ |
| if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) && |
| !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
| proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
| } |
| virtio_pci_start_ioeventfd(proxy); |
| } else { |
| virtio_pci_stop_ioeventfd(proxy); |
| } |
| } |
| |
| #ifdef CONFIG_VIRTFS |
| static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev) |
| { |
| V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev); |
| DeviceState *vdev = DEVICE(&dev->vdev); |
| |
| qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
| if (qdev_init(vdev) < 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| 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_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
| DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf), |
| 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->init = virtio_9p_init_pci; |
| 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); |
| object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_9P); |
| object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
| } |
| |
| static const TypeInfo virtio_9p_pci_info = { |
| .name = TYPE_VIRTIO_9P_PCI, |
| .parent = TYPE_VIRTIO_PCI, |
| .instance_size = sizeof(V9fsPCIState), |
| .instance_init = virtio_9p_pci_instance_init, |
| .class_init = virtio_9p_pci_class_init, |
| }; |
| #endif /* CONFIG_VIRTFS */ |
| |
| /* |
| * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. |
| */ |
| |
| /* This is called by virtio-bus just after the device is plugged. */ |
| static void virtio_pci_device_plugged(DeviceState *d) |
| { |
| VirtIOPCIProxy *proxy = VIRTIO_PCI(d); |
| VirtioBusState *bus = &proxy->bus; |
| uint8_t *config; |
| uint32_t size; |
| |
| proxy->vdev = bus->vdev; |
| |
| config = proxy->pci_dev.config; |
| if (proxy->class_code) { |
| pci_config_set_class(config, proxy->class_code); |
| } |
| pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, |
| pci_get_word(config + PCI_VENDOR_ID)); |
| pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); |
| config[PCI_INTERRUPT_PIN] = 1; |
| |
| if (proxy->nvectors && |
| msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) { |
| proxy->nvectors = 0; |
| } |
| |
| proxy->pci_dev.config_write = virtio_write_config; |
| |
| size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) |
| + virtio_bus_get_vdev_config_len(bus); |
| if (size & (size - 1)) { |
| size = 1 << qemu_fls(size); |
| } |
| |
| memory_region_init_io(&proxy->bar, OBJECT(proxy), &virtio_pci_config_ops, |
| proxy, "virtio-pci", size); |
| pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, |
| &proxy->bar); |
| |
| if (!kvm_has_many_ioeventfds()) { |
| proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; |
| } |
| |
| proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; |
| proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE; |
| proxy->host_features = virtio_bus_get_vdev_features(bus, |
| proxy->host_features); |
| } |
| |
| static int virtio_pci_init(PCIDevice *pci_dev) |
| { |
| VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev); |
| VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); |
| virtio_pci_bus_new(&dev->bus, sizeof(dev->bus), dev); |
| if (k->init != NULL) { |
| return k->init(dev); |
| } |
| return 0; |
| } |
| |
| static void virtio_pci_exit(PCIDevice *pci_dev) |
| { |
| VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); |
| virtio_pci_stop_ioeventfd(proxy); |
| memory_region_destroy(&proxy->bar); |
| msix_uninit_exclusive_bar(pci_dev); |
| } |
| |
| static void virtio_pci_reset(DeviceState *qdev) |
| { |
| VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); |
| VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); |
| virtio_pci_stop_ioeventfd(proxy); |
| virtio_bus_reset(bus); |
| msix_unuse_all_vectors(&proxy->pci_dev); |
| proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
| } |
| |
| static void virtio_pci_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| k->init = virtio_pci_init; |
| k->exit = virtio_pci_exit; |
| k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| k->revision = VIRTIO_PCI_ABI_VERSION; |
| k->class_id = PCI_CLASS_OTHERS; |
| dc->reset = virtio_pci_reset; |
| } |
| |
| static const TypeInfo virtio_pci_info = { |
| .name = TYPE_VIRTIO_PCI, |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(VirtIOPCIProxy), |
| .class_init = virtio_pci_class_init, |
| .class_size = sizeof(VirtioPCIClass), |
| .abstract = true, |
| }; |
| |
| /* virtio-blk-pci */ |
| |
| static Property virtio_blk_pci_properties[] = { |
| DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
| DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, |
| VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
| DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
| #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE |
| DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false), |
| #endif |
| DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), |
| DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev) |
| { |
| VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); |
| DeviceState *vdev = DEVICE(&dev->vdev); |
| virtio_blk_set_conf(vdev, &(dev->blk)); |
| qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
| if (qdev_init(vdev) < 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); |
| PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); |
| |
| set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
| dc->props = virtio_blk_pci_properties; |
| k->init = virtio_blk_pci_init; |
| pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; |
| pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; |
| pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; |
| } |
| |
| static void virtio_blk_pci_instance_init(Object *obj) |
| { |
| VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); |
| object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK); |
| object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
| } |
| |
| static const TypeInfo virtio_blk_pci_info = { |
| .name = TYPE_VIRTIO_BLK_PCI, |
| .parent = TYPE_VIRTIO_PCI, |
| .instance_size = sizeof(VirtIOBlkPCI), |
| .instance_init = virtio_blk_pci_instance_init, |
| .class_init = virtio_blk_pci_class_init, |
| }; |
| |
| /* virtio-scsi-pci */ |
| |
| static Property virtio_scsi_pci_properties[] = { |
| DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, |
| VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
| DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, |
| DEV_NVECTORS_UNSPECIFIED), |
| DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features), |
| DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.parent_obj.conf), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) |
| { |
| VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); |
| DeviceState *vdev = DEVICE(&dev->vdev); |
| 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)); |
| if (qdev_init(vdev) < 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); |
| PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); |
| k->init = virtio_scsi_pci_init_pci; |
| 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); |
| object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI); |
| object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
| } |
| |
| static const TypeInfo virtio_scsi_pci_info = { |
| .name = TYPE_VIRTIO_SCSI_PCI, |
| .parent = TYPE_VIRTIO_PCI, |
| .instance_size = sizeof(VirtIOSCSIPCI), |
| .instance_init = virtio_scsi_pci_instance_init, |
| .class_init = virtio_scsi_pci_class_init, |
| }; |
| |
| /* vhost-scsi-pci */ |
| |
| #ifdef CONFIG_VHOST_SCSI |
| static Property vhost_scsi_pci_properties[] = { |
| DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, |
| DEV_NVECTORS_UNSPECIFIED), |
| DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
| DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSIPCI, vdev.parent_obj.conf), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) |
| { |
| 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)); |
| if (qdev_init(vdev) < 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| 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->init = vhost_scsi_pci_init_pci; |
| 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); |
| object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI); |
| object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
| } |
| |
| static const TypeInfo vhost_scsi_pci_info = { |
| .name = TYPE_VHOST_SCSI_PCI, |
| .parent = TYPE_VIRTIO_PCI, |
| .instance_size = sizeof(VHostSCSIPCI), |
| .instance_init = vhost_scsi_pci_instance_init, |
| .class_init = vhost_scsi_pci_class_init, |
| }; |
| #endif |
| |
| /* virtio-balloon-pci */ |
| |
| static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v, |
| void *opaque, const char *name, |
| Error **errp) |
| { |
| VirtIOBalloonPCI *dev = opaque; |
| object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); |
| } |
| |
| static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v, |
| void *opaque, const char *name, |
| Error **errp) |
| { |
| VirtIOBalloonPCI *dev = opaque; |
| object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", |
| errp); |
| } |
| |
| static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v, |
| void *opaque, const char *name, |
| Error **errp) |
| { |
| VirtIOBalloonPCI *dev = opaque; |
| object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", |
| errp); |
| } |
| |
| static Property virtio_balloon_pci_properties[] = { |
| DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
| DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev) |
| { |
| VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); |
| DeviceState *vdev = DEVICE(&dev->vdev); |
| |
| if (vpci_dev->class_code != PCI_CLASS_OTHERS && |
| vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */ |
| vpci_dev->class_code = PCI_CLASS_OTHERS; |
| } |
| |
| qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
| if (qdev_init(vdev) < 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); |
| PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); |
| k->init = virtio_balloon_pci_init; |
| 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); |
| object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON); |
| object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
| |
| object_property_add(obj, "guest-stats", "guest statistics", |
| balloon_pci_stats_get_all, NULL, NULL, dev, |
| NULL); |
| |
| object_property_add(obj, "guest-stats-polling-interval", "int", |
| balloon_pci_stats_get_poll_interval, |
| balloon_pci_stats_set_poll_interval, |
| NULL, dev, NULL); |
| } |
| |
| static const TypeInfo virtio_balloon_pci_info = { |
| .name = TYPE_VIRTIO_BALLOON_PCI, |
| .parent = TYPE_VIRTIO_PCI, |
| .instance_size = sizeof(VirtIOBalloonPCI), |
| .instance_init = virtio_balloon_pci_instance_init, |
| .class_init = virtio_balloon_pci_class_init, |
| }; |
| |
| /* virtio-serial-pci */ |
| |
| static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev) |
| { |
| 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)); |
| if (qdev_init(vdev) < 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| 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_HEX32("class", VirtIOPCIProxy, class_code, 0), |
| DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
| DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI, vdev.serial), |
| 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->init = virtio_serial_pci_init; |
| 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); |
| object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL); |
| object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
| } |
| |
| static const TypeInfo virtio_serial_pci_info = { |
| .name = TYPE_VIRTIO_SERIAL_PCI, |
| .parent = TYPE_VIRTIO_PCI, |
| .instance_size = sizeof(VirtIOSerialPCI), |
| .instance_init = virtio_serial_pci_instance_init, |
| .class_init = virtio_serial_pci_class_init, |
| }; |
| |
| /* virtio-net-pci */ |
| |
| static Property virtio_net_properties[] = { |
| DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, |
| VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), |
| DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), |
| DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), |
| DEFINE_NIC_PROPERTIES(VirtIONetPCI, vdev.nic_conf), |
| DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetPCI, vdev.net_conf), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev) |
| { |
| DeviceState *qdev = DEVICE(vpci_dev); |
| VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev); |
| DeviceState *vdev = DEVICE(&dev->vdev); |
| |
| virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features); |
| virtio_net_set_netclient_name(&dev->vdev, qdev->id, |
| object_get_typename(OBJECT(qdev))); |
| qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
| if (qdev_init(vdev) < 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| 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->init = virtio_net_pci_init; |
| } |
| |
| static void virtio_net_pci_instance_init(Object *obj) |
| { |
| VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); |
| object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET); |
| object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
| } |
| |
| static const TypeInfo virtio_net_pci_info = { |
| .name = TYPE_VIRTIO_NET_PCI, |
| .parent = TYPE_VIRTIO_PCI, |
| .instance_size = sizeof(VirtIONetPCI), |
| .instance_init = virtio_net_pci_instance_init, |
| .class_init = virtio_net_pci_class_init, |
| }; |
| |
| /* virtio-rng-pci */ |
| |
| static Property virtio_rng_pci_properties[] = { |
| DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
| DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORngPCI, vdev.conf), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev) |
| { |
| VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev); |
| DeviceState *vdev = DEVICE(&vrng->vdev); |
| |
| qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
| if (qdev_init(vdev) < 0) { |
| return -1; |
| } |
| |
| object_property_set_link(OBJECT(vrng), |
| OBJECT(vrng->vdev.conf.rng), "rng", |
| NULL); |
| |
| return 0; |
| } |
| |
| 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->init = virtio_rng_pci_init; |
| set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
| dc->props = virtio_rng_pci_properties; |
| |
| pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; |
| pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; |
| pcidev_k->class_id = PCI_CLASS_OTHERS; |
| } |
| |
| static void virtio_rng_initfn(Object *obj) |
| { |
| VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj); |
| object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG); |
| object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
| object_property_add_link(obj, "rng", TYPE_RNG_BACKEND, |
| (Object **)&dev->vdev.conf.rng, NULL); |
| |
| } |
| |
| static const TypeInfo virtio_rng_pci_info = { |
| .name = TYPE_VIRTIO_RNG_PCI, |
| .parent = TYPE_VIRTIO_PCI, |
| .instance_size = sizeof(VirtIORngPCI), |
| .instance_init = virtio_rng_initfn, |
| .class_init = virtio_rng_pci_class_init, |
| }; |
| |
| /* virtio-pci-bus */ |
| |
| static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, |
| VirtIOPCIProxy *dev) |
| { |
| DeviceState *qdev = DEVICE(dev); |
| BusState *qbus; |
| char virtio_bus_name[] = "virtio-bus"; |
| |
| qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev, |
| virtio_bus_name); |
| qbus = BUS(bus); |
| qbus->allow_hotplug = 1; |
| } |
| |
| static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) |
| { |
| BusClass *bus_class = BUS_CLASS(klass); |
| VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); |
| bus_class->max_dev = 1; |
| k->notify = virtio_pci_notify; |
| k->save_config = virtio_pci_save_config; |
| k->load_config = virtio_pci_load_config; |
| k->save_queue = virtio_pci_save_queue; |
| k->load_queue = virtio_pci_load_queue; |
| k->get_features = virtio_pci_get_features; |
| k->query_guest_notifiers = virtio_pci_query_guest_notifiers; |
| k->set_host_notifier = virtio_pci_set_host_notifier; |
| k->set_guest_notifiers = virtio_pci_set_guest_notifiers; |
| k->vmstate_change = virtio_pci_vmstate_change; |
| k->device_plugged = virtio_pci_device_plugged; |
| } |
| |
| static const TypeInfo virtio_pci_bus_info = { |
| .name = TYPE_VIRTIO_PCI_BUS, |
| .parent = TYPE_VIRTIO_BUS, |
| .instance_size = sizeof(VirtioPCIBusState), |
| .class_init = virtio_pci_bus_class_init, |
| }; |
| |
| static void virtio_pci_register_types(void) |
| { |
| type_register_static(&virtio_rng_pci_info); |
| type_register_static(&virtio_pci_bus_info); |
| type_register_static(&virtio_pci_info); |
| #ifdef CONFIG_VIRTFS |
| type_register_static(&virtio_9p_pci_info); |
| #endif |
| type_register_static(&virtio_blk_pci_info); |
| type_register_static(&virtio_scsi_pci_info); |
| type_register_static(&virtio_balloon_pci_info); |
| type_register_static(&virtio_serial_pci_info); |
| type_register_static(&virtio_net_pci_info); |
| #ifdef CONFIG_VHOST_SCSI |
| type_register_static(&vhost_scsi_pci_info); |
| #endif |
| } |
| |
| type_init(virtio_pci_register_types) |
