netdev - Re: [PATCH net-next v9 1/4] virtio_net: Introduce VIRTIO_NET_F

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Date:   Mon, 30 Apr 2018 12:14:19 -0700
From:   "Samudrala, Sridhar" <sridhar.samudrala@...el.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     mst@...hat.com, stephen@...workplumber.org, davem@...emloft.net,
        netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        virtio-dev@...ts.oasis-open.org, jesse.brandeburg@...el.com,
        alexander.h.duyck@...el.com, kubakici@...pl, jasowang@...hat.com,
        loseweigh@...il.com, aaron.f.brown@...el.com
Subject: Re: [PATCH net-next v9 1/4] virtio_net: Introduce
 VIRTIO_NET_F_STANDBY feature bit


On 4/30/2018 12:03 AM, Jiri Pirko wrote:
> Mon, Apr 30, 2018 at 04:47:03AM CEST, sridhar.samudrala@...el.com wrote:
>> On 4/28/2018 12:50 AM, Jiri Pirko wrote:
>>> Fri, Apr 27, 2018 at 07:06:57PM CEST,sridhar.samudrala@...el.com  wrote:
>>>> This feature bit can be used by hypervisor to indicate virtio_net device to
>>>> act as a standby for another device with the same MAC address.
>>>>
>>>> VIRTIO_NET_F_STANDBY is defined as bit 62 as it is a device feature bit.
>>>>
>>>> Signed-off-by: Sridhar Samudrala<sridhar.samudrala@...el.com>
>>>> ---
>>>> drivers/net/virtio_net.c        | 2 +-
>>>> include/uapi/linux/virtio_net.h | 3 +++
>>>> 2 files changed, 4 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
>>>> index 3b5991734118..51a085b1a242 100644
>>>> --- a/drivers/net/virtio_net.c
>>>> +++ b/drivers/net/virtio_net.c
>>>> @@ -2999,7 +2999,7 @@ static struct virtio_device_id id_table[] = {
>>>> 	VIRTIO_NET_F_GUEST_ANNOUNCE, VIRTIO_NET_F_MQ, \
>>>> 	VIRTIO_NET_F_CTRL_MAC_ADDR, \
>>>> 	VIRTIO_NET_F_MTU, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, \
>>>> -	VIRTIO_NET_F_SPEED_DUPLEX
>>>> +	VIRTIO_NET_F_SPEED_DUPLEX, VIRTIO_NET_F_STANDBY
>>> This is not part of current qemu master (head 6f0c4706b35dead265509115ddbd2a8d1af516c1)
>>> Were I can find the qemu code?
>>>
>>> Also, I think it makes sense to push HW (qemu HW in this case) first
>>> and only then the driver.
>> I had sent qemu patch with a couple of earlier versions of this patchset.
>> Will include it when i send out v10.
> The point was, don't you want to push it to qemu first? Did you at least
> send RFC to qemu?

Yes. Here is the link to the RFC patch.
https://patchwork.ozlabs.org/patch/859521/