Re: [virtio-dev] Re: [PATCH 0/5] virtio: introduce SUSPEND bit and vq state

["Zhu, Lingshan" <lingshan.zhu@intel.com>]

On 9/19/2023 3:53 PM, Parav Pandit wrote:
> > From: Zhu, Lingshan <lingshan.zhu@intel.com>
> > Sent: Tuesday, September 19, 2023 1:16 PM
> >
> > On 9/19/2023 3:32 PM, Parav Pandit wrote:
> > > > From: Jason Wang <jasowang@redhat.com>
> > > > Sent: Tuesday, September 19, 2023 9:58 AM
> > > >
> > > > On Mon, Sep 18, 2023 at 2:55âPM Parav Pandit <parav@nvidia.com> wrote:
> > > > > > From: Zhu, Lingshan <lingshan.zhu@intel.com>
> > > > > > Sent: Monday, September 18, 2023 12:19 PM
> > > > > > so admin vq based LM solution can be a side channel attacking
> > > > > > surface
> > > > > It will be part of the DSM whenever it will be used in future.
> > > > > Hence, it is not attack surface.
> > > > DSM is not a part of TVM. So it really depends on what kind of work
> > > > did the admin virtqueue do. For commands that can't be self-contained
> > > > like provisioning, it is fine, since it is done before the TDI
> > > > assignment. But it not necessarily for your migration proposal. It
> > > > seems you've found another case that self-containing is important:
> > > > allowing the owner to access the member after TDI is attached to TVM
> > > > is a side channel attack.
> > > TVM and DSM specs will be extended in future when we get there, so core
> > hypervisor will not be involved.
> > > With trap+mediation, it is involved.
> > >
> > > Lingshan wanted to take this TDISP extension in future.
> > > So are you both aligned or not yet?
> > I didn't say that, never ever.
> In your previous email you wrote,
>
> 1. "so lets focus on LM topic, other than confidential computing."
> 2. "again, TDISP is out of spec and TDISP devices are not migratable."
>
>  From above two comments from you I understood it that way, you want to focus now on the LM _other_than_ CC.
> How to read it differently?
You said:"Lingshan wanted to take this TDISP extension in future."

How do you conclude this statement? Did I ever said I want to take TDISP 
extension in future?
>