On Fri, Feb 06, 2015 at 03:36:52PM +1030, Rusty Russell wrote:
> This provides backdoor access to the device MMIOs, and every device should
> have one. From the virtio 1.0 spec (CS03):
>
> 4.1.4.7.1 Device Requirements: PCI configuration access capability
>
> The device MUST present at least one VIRTIO_PCI_CAP_PCI_CFG capability.
>
> Signed-off-by: Rusty Russell <ru...@rustcorp.com.au>
Acked-by: Michael S. Tsirkin <m...@redhat.com>
> ---
> include/uapi/linux/virtio_pci.h | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h
> index 3b7e4d2765fb..75301468359f 100644
> --- a/include/uapi/linux/virtio_pci.h
> +++ b/include/uapi/linux/virtio_pci.h
> @@ -109,8 +109,10 @@
> #define VIRTIO_PCI_CAP_NOTIFY_CFG 2
> /* ISR access */
> #define VIRTIO_PCI_CAP_ISR_CFG 3
> -/* Device specific confiuration */
> +/* Device specific configuration */
> #define VIRTIO_PCI_CAP_DEVICE_CFG 4
> +/* PCI configuration access */
> +#define VIRTIO_PCI_CAP_PCI_CFG 5
>
> /* This is the PCI capability header: */
> struct virtio_pci_cap {
> --
> 2.1.0
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