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