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Re: [PATCH] virtio: remove the excess virtio features check
From: |
Michael S. Tsirkin |
Subject: |
Re: [PATCH] virtio: remove the excess virtio features check |
Date: |
Wed, 9 Nov 2022 09:46:18 -0500 |
On Wed, Nov 09, 2022 at 07:10:21PM +0800, Xuan Zhuo wrote:
> In virtio_queue_enable(), we checked virtio feature VIRTIO_F_VERSION_1.
>
> This check is not necessary, and conflict with SeaBIOS. The problem
> appeared in SeaBIOS. But we also remove this check.
>
> Link: https://www.mail-archive.com/qemu-devel@nongnu.org/msg920538.html
> Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
> ---
> hw/virtio/virtio.c | 5 -----
> 1 file changed, 5 deletions(-)
>
> diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> index 9683b2e158..701e23ea6a 100644
> --- a/hw/virtio/virtio.c
> +++ b/hw/virtio/virtio.c
> @@ -2499,11 +2499,6 @@ void virtio_queue_enable(VirtIODevice *vdev, uint32_t
> queue_index)
> {
> VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>
> - if (!virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
> - error_report("queue_enable is only suppported in devices of virtio "
> - "1.0 or later.");
> - }
> -
> if (k->queue_enable) {
> k->queue_enable(vdev, queue_index);
> }
Well this warning turned out to be actually useful.
Let's see whether we can fix seabios in time for release.
If yes I would just make it LOG_GUEST_ERR and limit to
latest machine type but not drop completely.
> --
> 2.32.0.3.g01195cf9f