On 2020/12/1 18:55, Marc Zyngier wrote: > On 2020-11-30 07:23, Shenming Lu wrote: > > Hi Shenming, > >> We are pondering over this problem these days, but still don't get a >> good solution... >> Could you give us some advice on this? >> >> Or could we move the restoring of the pending states (include the sync >> from guest RAM and the transfer to HW) to the GIC VM state change handler, >> which is completely corresponding to save_pending_tables (more symmetric?) >> and don't expose GICv4... > > What is "the GIC VM state change handler"? Is that a QEMU thing? Yeah, it is a a QEMU thing... > We don't really have that concept in KVM, so I'd appreciate if you could > be a bit more explicit on this. My thought is to add a new interface (to QEMU) for the restoring of the pending states, which is completely corresponding to KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES... And it is called from the GIC VM state change handler in QEMU, which is happening after the restoring (call kvm_vgic_v4_set_forwarding()) but before the starting (running) of the VFIO device. Thanks, Shenming > > Thanks, > > M.
