> @@ -682,10 +733,18 @@ void virtio_init_pci(VirtIOPCIProxy *proxy,
> VirtIODevice *vdev) if (size & (size-1))
> size = 1 << qemu_fls(size);
>
> +proxy->bar0_mask = size - 1;
You'll get better performance if you use page-sized mappings. You're already
creating a mapping bigger tha
Currently virtio-pci is specified so that configuration of the device is
done through a PCI IO space (via BAR 0 of the virtual PCI device).
However, Linux guests happen to use ioread/iowrite/iomap primitives
for access, and these work uniformly across memory/io BARs.
While PCI IO accesses are fast
