On Wed, Nov 23, 2011 at 01:02:22PM +1030, Rusty Russell wrote:
> +/* Fields in VIRTIO_PCI_CAP_COMMON_CFG: */
> +struct virtio_pci_common_cfg {
> + /* About the whole device. */
> + __u64 device_features; /* read-only */
> + __u64 guest_features; /* read-write */
We currently require atomic accesses to common fields.
Some architectures might not have such for 64 bit,
so these need to be split I think ...
> + __u64 queue_address; /* read-write */
> + __u16 msix_config; /* read-write */
> + __u8 device_status; /* read-write */
> + __u8 unused;
> +
> + /* About a specific virtqueue. */
> + __u16 queue_select; /* read-write */
> + __u16 queue_align; /* read-write, power of 2. */
> + __u16 queue_size; /* read-write, power of 2. */
> + __u16 queue_msix_vector;/* read-write */
> +};
> #endif
>
>
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