[ipxe-devel] [PATCH] virtio-net: support VIRTIO_NET_F_IOMMU_PLATFORM

[Michael S. Tsirkin]

On Mon, Jul 10, 2017 at 05:10:41PM +0800, Jason Wang wrote:
> Since we don't enable IOMMU at all, we can then simply enable the
> IOMMU support by claiming the support of VIRITO_F_IOMMU_PLATFORM. This
> fixes booting failure when iommu_platform is set from qemu cli.
> 
> Signed-off-by: Jason Wang <jasowang at redhat.com>

Acked-by: Michael S. Tsirkin <mst at redhat.com>

> ---
>  src/drivers/net/virtio-net.c   | 3 ++-
>  src/include/ipxe/virtio-ring.h | 1 +
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/src/drivers/net/virtio-net.c b/src/drivers/net/virtio-net.c
> index 4151532..19857b9 100644
> --- a/src/drivers/net/virtio-net.c
> +++ b/src/drivers/net/virtio-net.c
> @@ -259,7 +259,8 @@ static int virtnet_open_modern ( struct net_device *netdev ) {
>  		( 1ULL << VIRTIO_NET_F_MAC ) |
>  		( 1ULL << VIRTIO_NET_F_MTU ) |
>  		( 1ULL << VIRTIO_F_VERSION_1 ) |
> -		( 1ULL << VIRTIO_F_ANY_LAYOUT ) ) );
> +		( 1ULL << VIRTIO_F_ANY_LAYOUT ) |
> +		( 1ULL << VIRTIO_F_IOMMU_PLATFORM)) );
>  	vpm_add_status ( &virtnet->vdev, VIRTIO_CONFIG_S_FEATURES_OK );
>  
>  	status = vpm_get_status ( &virtnet->vdev );
> diff --git a/src/include/ipxe/virtio-ring.h b/src/include/ipxe/virtio-ring.h
> index e608e62..852769f 100644
> --- a/src/include/ipxe/virtio-ring.h
> +++ b/src/include/ipxe/virtio-ring.h
> @@ -20,6 +20,7 @@
>  #define VIRTIO_F_ANY_LAYOUT             27
>  /* v1.0 compliant. */
>  #define VIRTIO_F_VERSION_1              32
> +#define VIRTIO_F_IOMMU_PLATFORM         33
>  
>  #define MAX_QUEUE_NUM      (256)
>  
> -- 
> 2.7.4