linux-kernel - Re: [PATCH] vdpa_sim_net: Offer VIRTIO_NET_F

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Message-ID: <CAPpAL=xabY1hAG+=A92fPpRLYJxmk_AKtS+-QonUvwg-LfTQaw@mail.gmail.com>
Date:   Wed, 23 Nov 2022 19:35:16 +0800
From:   Lei Yang <leiyang@...hat.com>
To:     Eugenio Pérez <eperezma@...hat.com>
Cc:     linux-kernel@...r.kernel.org, mst@...hat.com,
        virtualization@...ts.linux-foundation.org,
        Jason Wang <jasowang@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>
Subject: Re: [PATCH] vdpa_sim_net: Offer VIRTIO_NET_F_STATUS

QE applied this path in the test environment, and did regression
testing with a vdpa simulator device; there are no new issues raised
by this patch.

Tested-by: Lei Yang <leiyang@...hat.com>

Eugenio Pérez <eperezma@...hat.com> 于2022年11月23日周三 18:36写道：
>
> VIRTIO_NET_S_LINK_UP is already returned in config reads since vdpasim
> creation, but the feature bit was not offered to the driver.
>
> Tested modifying VIRTIO_NET_S_LINK_UP and different values of "status"
> in qemu virtio-net options, using vhost_vdpa.
>
> Not considering as a fix, because there should be no driver trusting in
> this config read before the feature flag.
>
> Signed-off-by: Eugenio Pérez <eperezma@...hat.com>
> ---
>  drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> index c3cb225ea469..30cfcfcf97f7 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> @@ -27,6 +27,7 @@
>
>  #define VDPASIM_NET_FEATURES   (VDPASIM_FEATURES | \
>                                  (1ULL << VIRTIO_NET_F_MAC) | \
> +                                (1ULL << VIRTIO_NET_F_STATUS) | \
>                                  (1ULL << VIRTIO_NET_F_MTU) | \
>                                  (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
>                                  (1ULL << VIRTIO_NET_F_CTRL_MAC_ADDR))
> --
> 2.31.1
>
>