From: "Michael S. Tsirkin" <mst@redhat.com>
To: Stefano Garzarella <sgarzare@redhat.com>
Cc: Eli Cohen <elic@nvidia.com>,
Linux Virtualization <virtualization@lists.linux-foundation.org>
Subject: Re: vDPA bus driver selection
Date: Wed, 27 Oct 2021 14:45:15 -0400 [thread overview]
Message-ID: <20211027144048-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <CAGxU2F7r7=P8E-f1Nnm2h18S-hL8YBt7s=J81fkQcrAdpZ-KwQ@mail.gmail.com>
On Wed, Oct 27, 2021 at 04:33:50PM +0200, Stefano Garzarella wrote:
> Hi folks,
> I was trying to understand if we have a way to specify which vDPA bus
> driver (e.g. vhost-vdpa, virtio-vdpa) a device should use.
> IIUC we don't have it, and the first registered driver is used when a
> new device is registered.
>
> I was thinking if it makes sense to extend the management API to
> specify which bus driver to use for a device. A use case could be for
> example a single host handling VMs and bare-metal containers, so we
> would have both virtio-vdpa and vhost-vdpa loaded and we want to
> attach some devices to VMs through vhost-vdpa and others to containers
> through virtio-vdpa.
>
> What do you think?
>
> I can prepare an RFC with some code, the idea is to use the .match
> callback of "struct bus_type" to use a driver instead of the other,
> and extend netlink API to specify the vDPA bus driver name to use.
>
> Thanks,
> Stefano
So I think that doing this at create time is somewhat limited.
For example a great way to do migration could be to unbind
device from VM then bind virtio on the host to it, then
bind macvtap to that.
Ideas on how to allow that?
--
MST
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next prev parent reply other threads:[~2021-10-27 18:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-27 14:33 vDPA bus driver selection Stefano Garzarella
2021-10-27 15:21 ` Parav Pandit via Virtualization
2021-10-27 15:47 ` Stefano Garzarella
2021-10-27 15:56 ` Parav Pandit via Virtualization
2021-10-28 9:37 ` Stefano Garzarella
2021-10-28 9:48 ` Parav Pandit via Virtualization
2021-10-29 2:34 ` Jason Wang
2021-10-29 14:41 ` Stefano Garzarella
2021-10-29 15:41 ` Parav Pandit via Virtualization
2021-10-27 20:16 ` Michael S. Tsirkin
2021-10-28 2:24 ` Jason Wang
2021-10-28 9:47 ` Stefano Garzarella
2021-10-29 2:31 ` Jason Wang
2021-10-29 14:32 ` Stefano Garzarella
2021-10-28 3:10 ` Parav Pandit via Virtualization
2021-10-27 18:45 ` Michael S. Tsirkin [this message]
2021-10-28 9:34 ` Stefano Garzarella
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