diff mbox series

[v4,4/4] virtio_net: Add third acceptable configuration for MAC setup.

Message ID 20241109063241.1039433-5-lulu@redhat.com (mailing list archive)
State New
Headers show
Series virtio_net: Add the check for vdpa's mac address | expand

Commit Message

Cindy Lu Nov. 9, 2024, 6:31 a.m. UTC 
For VDPA devices, Allow configurations where both the hardware MAC address
and QEMU command line MAC address are zero.

Signed-off-by: Cindy Lu <lulu@redhat.com>
---
 hw/net/virtio-net.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index f74aa4f8db..66f21f74f4 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -3627,6 +3627,19 @@  static bool virtio_net_check_vdpa_mac(NetClientState *nc, VirtIONet *n,
             return true;
         }
     }
+    /*
+     * 3.The hardware MAC address is 0,
+     *  and the MAC address in the QEMU command line is also 0.
+     *  In this situation, qemu will generate a random mac address
+     *  QEMU will try to use CVQ/set_config to set this address to
+     *  device
+     */
+    if ((memcmp(&hwcfg.mac, &zero, sizeof(MACAddr)) == 0) &&
+        (memcmp(cmdline_mac, &zero, sizeof(MACAddr)) == 0)) {
+        memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac));
+
+        return true;
+    }
 
     error_setg(errp,
                "vDPA device's mac %02x:%02x:%02x:%02x:%02x:%02x"