vdpasim: allow to assign a MAC address
Add macaddr parameter to the module to set the MAC address to use
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Link: https://lore.kernel.org/r/20201029122050.776445-3-lvivier@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 3192ce4..9e9ead8 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -38,6 +38,10 @@
module_param(batch_mapping, int, 0444);
MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");
+static char *macaddr;
+module_param(macaddr, charp, 0);
+MODULE_PARM_DESC(macaddr, "Ethernet MAC address");
+
struct vdpasim_virtqueue {
struct vringh vring;
struct vringh_kiov iov;
@@ -375,7 +379,15 @@
if (!vdpasim->buffer)
goto err_iommu;
- eth_random_addr(vdpasim->config.mac);
+ if (macaddr) {
+ mac_pton(macaddr, vdpasim->config.mac);
+ if (!is_valid_ether_addr(vdpasim->config.mac)) {
+ ret = -EADDRNOTAVAIL;
+ goto err_iommu;
+ }
+ } else {
+ eth_random_addr(vdpasim->config.mac);
+ }
vringh_set_iotlb(&vdpasim->vqs[0].vring, vdpasim->iommu);
vringh_set_iotlb(&vdpasim->vqs[1].vring, vdpasim->iommu);
