diff options
| -rw-r--r-- | hw/virtio/virtio-pci.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 94815845a1..16d6e69a55 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -926,8 +926,6 @@ static void virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, PCIDevice *dev = &proxy->pci_dev; int offset; - cap->bar = 2; - offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, cap->cap_len); assert(offset > 0); @@ -1203,6 +1201,22 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp) uint32_t size; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + /* + * virtio pci bar layout + * + * region 0 -- virtio legacy io bar + * region 1 -- msi-x bar + * region 2+3 -- not used by virtio-pci + * region 4+5 -- virtio modern memory (64bit) bar + * + * Regions 2+3 can be used by VirtIOPCIProxy subclasses. + * virtio-vga places the vga framebuffer there. + * + */ + uint32_t legacy_io_bar = 0; + uint32_t msix_bar = 1; + uint32_t modern_mem_bar = 4; + config = proxy->pci_dev.config; if (proxy->class_code) { pci_config_set_class(config, proxy->class_code); @@ -1228,24 +1242,28 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp) struct virtio_pci_cap common = { .cfg_type = VIRTIO_PCI_CAP_COMMON_CFG, .cap_len = sizeof common, + .bar = modern_mem_bar, .offset = cpu_to_le32(0x0), .length = cpu_to_le32(0x1000), }; struct virtio_pci_cap isr = { .cfg_type = VIRTIO_PCI_CAP_ISR_CFG, .cap_len = sizeof isr, + .bar = modern_mem_bar, .offset = cpu_to_le32(0x1000), .length = cpu_to_le32(0x1000), }; struct virtio_pci_cap device = { .cfg_type = VIRTIO_PCI_CAP_DEVICE_CFG, .cap_len = sizeof device, + .bar = modern_mem_bar, .offset = cpu_to_le32(0x2000), .length = cpu_to_le32(0x1000), }; struct virtio_pci_notify_cap notify = { .cap.cfg_type = VIRTIO_PCI_CAP_NOTIFY_CFG, .cap.cap_len = sizeof notify, + .cap.bar = modern_mem_bar, .cap.offset = cpu_to_le32(0x3000), .cap.length = cpu_to_le32(QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * VIRTIO_QUEUE_MAX), @@ -1325,12 +1343,13 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp) QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * VIRTIO_QUEUE_MAX); memory_region_add_subregion(&proxy->modern_bar, 0x3000, &proxy->notify); - pci_register_bar(&proxy->pci_dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, + pci_register_bar(&proxy->pci_dev, modern_mem_bar, + PCI_BASE_ADDRESS_SPACE_MEMORY, &proxy->modern_bar); } if (proxy->nvectors && - msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) { + msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, msix_bar)) { error_report("unable to init msix vectors to %" PRIu32, proxy->nvectors); proxy->nvectors = 0; @@ -1349,8 +1368,8 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp) &virtio_pci_config_ops, proxy, "virtio-pci", size); - pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, - &proxy->bar); + pci_register_bar(&proxy->pci_dev, legacy_io_bar, + PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar); } if (!kvm_has_many_ioeventfds()) { |