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

[Jason Wang]

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>
---
 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