linux-kernel - Re: [RFC v2 4/7] vduse: return internal vq group struct as map token

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Message-ID: <CACGkMEurTUOb6t9g+nVdzwU8LrZ=eAAxzHYVCTH1XkQkRtAUXQ@mail.gmail.com>
Date: Mon, 11 Aug 2025 11:11:22 +0800
From: Jason Wang <jasowang@...hat.com>
To: Eugenio Pérez <eperezma@...hat.com>
Cc: "Michael S . Tsirkin" <mst@...hat.com>, Cindy Lu <lulu@...hat.com>, 
	Yongji Xie <xieyongji@...edance.com>, Stefano Garzarella <sgarzare@...hat.com>, 
	virtualization@...ts.linux.dev, Laurent Vivier <lvivier@...hat.com>, 
	linux-kernel@...r.kernel.org, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, 
	Maxime Coquelin <mcoqueli@...hat.com>
Subject: Re: [RFC v2 4/7] vduse: return internal vq group struct as map token

On Thu, Aug 7, 2025 at 7:58 PM Eugenio Pérez <eperezma@...hat.com> wrote:
>
> Return the internal struct that represents the vq group as virtqueue map
> token, instead of the device.

Note that Michael prefers to use the iova domain. This indeed seems to
be better.

> This allows the DMA functions to access

s/DMA/map/

> the information per group.
>
> At this moment all the virtqueues share the same vq group, that only
> can point to ASID 0.  This change prepares the infrastructure for actual
> per-group address space handling
>
> Signed-off-by: Eugenio Pérez <eperezma@...hat.com>

Thanks