Re: [PATCH 5/5] virtio: Add bounce DMA ops

[Jan Kiszka]

On 29.04.20 12:20, Michael S. Tsirkin wrote:
> On Wed, Apr 29, 2020 at 03:39:53PM +0530, Srivatsa Vaddagiri wrote:
> > That would still not work I think where swiotlb is used for pass-thr devices
> > (when private memory is fine) as well as virtio devices (when shared memory is
> > required).
>
> So that is a separate question. When there are multiple untrusted
> devices, at the moment it looks like a single bounce buffer is used.
>
> Which to me seems like a security problem, I think we should protect
> untrusted devices from each other.

Definitely. That's the model we have for ivshmem-virtio as well.

Jan

--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux