On 11/08/15 16:24, Pavel Fedin wrote: > Hello! > >> I mean CPU interface registers GICC* defined for vgicv2 under >> "vgic_cpu_ranges[]" in >> virt/kvm/arm/vgic-v2-emul.c needs to be saved and restored for vgicv3 as well. >> So to access vgic_cpu_ranges[] for vgicv3, we need to register device >> for CPU registers space >> similar to gicv2 in QEMU for gicv3. > > This thing is optional and can be missing. It is for backwards > compatibility only, it allows to run GICv2 guests on GICv3. You > should not use this API for accessing system registers. Even more than that. The KVM emulation of GICv3 doesn't have *any* GICv2 compatibility. And that's on purpose. So trying to save the GICC registers should give you an error, because these registers *do not exist* as far as a guest is concerned. If you plan to do anything for GICv3, you should only deal with with the system register version of the CPU interface. Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
