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Subject: Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net
On 2018年06月05日 09:41, Samudrala, Sridhar wrote:
Ping on this patch now that the kernel patches are accepted into davem's net-next tree.https://patchwork.ozlabs.org/cover/920005/ On 5/7/2018 4:09 PM, Sridhar Samudrala wrote:This feature bit can be used by hypervisor to indicate virtio_net device toact as a standby for another device with the same MAC address.I tested this with a small change to the patch to mark the STANDBY feature 'true'by default as i am using libvirt to start the VMs.Is there a way to pass the newly added feature bit 'standby' to qemu via libvirtXML file?
Maybe you can try qemu command line passthrough: https://libvirt.org/drvqemu.html#qemucommand The patch looks good to me. Let's see if Michael have any comment. Thanks
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> --- hw/net/virtio-net.c | 2 ++ include/standard-headers/linux/virtio_net.h | 3 +++ 2 files changed, 5 insertions(+) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 90502fca7c..38b3140670 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -2198,6 +2198,8 @@ static Property virtio_net_properties[] = { true),DEFINE_PROP_INT32("speed", VirtIONet, net_conf.speed, SPEED_UNKNOWN),DEFINE_PROP_STRING("duplex", VirtIONet, net_conf.duplex_str),+ DEFINE_PROP_BIT64("standby", VirtIONet, host_features, VIRTIO_NET_F_STANDBY,+ false), DEFINE_PROP_END_OF_LIST(), };diff --git a/include/standard-headers/linux/virtio_net.h b/include/standard-headers/linux/virtio_net.hindex e9f255ea3f..01ec09684c 100644 --- a/include/standard-headers/linux/virtio_net.h +++ b/include/standard-headers/linux/virtio_net.h @@ -57,6 +57,9 @@ * Steering */ #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */+#define VIRTIO_NET_F_STANDBY 62 /* Act as standby for another device+ * with the same MAC. + */#define VIRTIO_NET_F_SPEED_DUPLEX 63 /* Device set linkspeed and duplex */#ifndef VIRTIO_NET_NO_LEGACY
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