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Subject: RE: [PATCH v2 0/2] transport-pci: Introduce legacy registers access using AQ
> From: Michael S. Tsirkin <mst@redhat.com> > Sent: Monday, May 15, 2023 2:02 PM > > > > > How can it be required if it not part of it? > > I likely didn't follow your question/comment, can you please explain. > > VIRTIO_F_NOTIF_CONFIG_DATA is there presumably for a reason. The discussion is for the legacy interface for which CONFIG_DATA doesn't exist. > > > > > For modern device, guest driver will access the device own BAR > > > > directly with > > > its own config_data anyway. > > > > Should we reserve a region in the PF BAR for SF/SIOV device?, > > > > should device > > > report which BAR/area to use for the given SF/SIOV device? > > > > May be yes, those are different discussions with tradeoff to > > > > consider during > > > SIOV discussions. It is not related to VFs. > > > > > > For SIOV it's a given. But we can do this for SRIOV: reserve a PF region per > VF. > > Each VF has its own BAR area for driver notifications. > > But it is passed through to guest presumably. Yes, so?
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