diff options
| -rw-r--r-- | hw/virtio-pci.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index f812ab7a6..f7a51ff76 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -364,8 +364,17 @@ static void virtio_map(PCIDevice *pci_dev, int region_num, 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); + + if (PCI_COMMAND == address) { + if (!(val & PCI_COMMAND_MASTER)) { + proxy->vdev->status &= !VIRTIO_CONFIG_S_DRIVER_OK; + } + } + pci_default_write_config(pci_dev, address, val, len); - msix_write_config(pci_dev, address, val, len); + if(proxy->vdev->nvectors) + msix_write_config(pci_dev, address, val, len); } static const VirtIOBindings virtio_pci_bindings = { @@ -407,11 +416,12 @@ static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev, msix_bar_size(&proxy->pci_dev), PCI_ADDRESS_SPACE_MEM, msix_mmio_map); - proxy->pci_dev.config_write = virtio_write_config; proxy->pci_dev.unregister = msix_uninit; } else vdev->nvectors = 0; + proxy->pci_dev.config_write = virtio_write_config; + size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len; if (size & (size-1)) size = 1 << qemu_fls(size); |