[PATCH 2/2] vdpasim: allow to assign a MAC address

[Laurent Vivier]

Add macaddr parameter to the module to set the MAC address to use

Signed-off-by: Laurent Vivier <lviv...@redhat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 7f8ebc9924ac..9cf7079ee185 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -38,6 +38,10 @@ static int batch_mapping = 1;
 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;
@@ -373,7 +377,15 @@ static struct vdpasim *vdpasim_create(void)
        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);
-- 
2.26.2