Re: [PATCH] virtio-iommu: Rework the bypass feature

[Cornelia Huck <cohuck@redhat.com>]

On Tue, Oct 05 2021, "Michael S. Tsirkin" <mst@redhat.com> wrote:

> On Tue, Oct 05, 2021 at 06:57:50PM +0200, Cornelia Huck wrote:
>> On Thu, Sep 30 2021, Jean-Philippe Brucker <jean-philippe@linaro.org> wrote:
>> >  \item[VIRTIO_IOMMU_F_BYPASS (3)]
>> > -  When not attached to a domain, endpoints downstream of the IOMMU
>> > -  can access the guest-physical address space.
>> > +  This feature is deprecated.
>> 
>> "and must not be negotiated." ?
>> 
>> Not sure if we should add normative statements for that.
>
> We can't just make existing art de jure illegal.
>
> So SHOULD NOT and yes needs confirmance statements.
> Given documentation is already there why remove it?

Right, let's make that SHOULD NOT.