> From: Michael S. Tsirkin <[email protected]> > Sent: Monday, May 15, 2023 1:45 PM > > On Mon, May 15, 2023 at 03:49:44PM +0000, Parav Pandit wrote: > > All legacy interface via AQ. > > All modern interface access via PCI or its own transport between driver and > device. > > I am wondering however about the hypervisor notifications. Generally these > are the most problematic aspect here I feel. For example, how does it > interact > with VIRTIO_F_NOTIF_CONFIG_DATA? And generally, having both guest and > host be allowed to access device's BAR seems problematic. > Can we reserve a PF BAR region for these things or is that too expensive?
VIRTIO_F_NOTIF_CONFIG_DATA is not present for the legacy. 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. --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
