linux-kernel - Re: [PATCH] vdpa: mandate 1.0 device

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Message-ID: <20210604075756.z67ycpyonmhqs37k@steredhat>
Date:   Fri, 4 Jun 2021 09:57:56 +0200
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     mst@...hat.com, elic@...dia.com, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH] vdpa: mandate 1.0 device

On Fri, Jun 04, 2021 at 01:02:51PM +0800, Jason Wang wrote:
>This patch mandates 1.0 for vDPA devices. The plan is never to support
>transitional devices for vDPA devices in the future.
>
>The reasons are:
>
>- To have the semantic of normative statement in the virtio spec and
>  eliminate the burden of transitional device for both vDPA bus and
>  vDPA parent
>- Eliminate the efforts for dealing with endian conversion in the
>  management tool
>- Mandate vDPA vendor to ship modern device instead of transitional
>  device which is easily broken and unsafe
>- Transitional device never work since the first day of vDPA
>
>Signed-off-by: Jason Wang <jasowang@...hat.com>
>---
> include/linux/vdpa.h | 6 ++++++
> 1 file changed, 6 insertions(+)

Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>