Re: [EXTERNAL] Re: [PATCH v2 0/2] vhost-vdpa: Add support for NO-IOMMU mode

Christoph Hellwig
2024-10-24T09:05:43Z

On Wed, Oct 23, 2024 at 04:19:02AM -0400, Michael S. Tsirkin wrote:
> On Tue, Oct 22, 2024 at 11:58:19PM -0700, Christoph Hellwig wrote:
> > On Sat, Oct 19, 2024 at 08:16:44PM -0400, Michael S. Tsirkin wrote:
> > > Because people want to move from some vendor specific solution with vfio
> > > to a standard vdpa compatible one with vdpa.
> >
> > So now you have a want for new use cases and you turn that into a must
> > for supporting completely insecure and dangerous crap.
>
> Nope.
>
> kernel is tainted -> unsupported
>
> whoever supports tainted kernels is already in dangerous waters.

That's not a carte blanche for doing whatever crazy stuff you
want.

And if you don't trust me I'll add Greg who has a very clear opinion
on IOMMU-bypassing user I/O hooks in the style of the uio driver as
well I think :)