On Tue, Jan 07, 2020 at 07:05:41PM +0100, BALATON Zoltan wrote: > On Tue, 7 Jan 2020, Greg Kurz wrote: > > On Tue, 7 Jan 2020 18:32:15 +0100 > > Greg Kurz wrote: > > > > > On Tue, 7 Jan 2020 15:48:19 +1100 > > > David Gibson wrote: > > > > > > > The PowerPC 970 CPU was a cut-down POWER4, which had hypervisor capability. > > > > However, it can be (and often was) strapped into "Apple mode", where the > > > > hypervisor capabilities were disabled (essentially putting it always in > > > > hypervisor mode). > > > > Isn't it supervisor mode instead of hypervisor mode ? > > By the way, do you know if this strapping is hardware or software based? So > is it the firmware that disables it on Apple hardware or is it some CPU pin > connected somewhere on the motherboard or it's within the CPU and cannot be > changed? I wonder if it's theoretically possible to re-enable it on an Apple > G5 or we would likely never see a PowerPC 970 with HV enabled? I don't know, sorry. -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson