On 31.05.2011, at 14:35, Paul Mackerras wrote: > On Tue, May 31, 2011 at 12:40:31PM +0200, Alexander Graf wrote: > >> Thinking about the testability of this a bit more ... how much >> effort would it be to get this code running on a 970MP with SLOF? >> There should only be a few POWER7 specific pieces, right? > > Do you have a 970MP that has a usable hypervisor mode, i.e. not an > Apple machine? The 970s in Apple machines have the HV hard-wired to > 1, which means they do have a hypervisor mode but it isn't any use. > > If you do have such a machine, then we would have to look at some > details like the instruction sequence for the partition switch, and > make sure we don't try to use SMT4 mode. Also, I believe we will have > to flush the TLB on partition switches, since Power processors prior > to POWER7 didn't tag the TLB entries with the partition ID. > > So it should be quite feasible if you have a non-Apple machine. > I will check whether the 970MP machines that Terrasoft were > distributing would be suitable. We have one of them in the lab. That's the one I was thinking of and yes, I have one available. That way I could test 99% of your code, you don't have to release hardware, and everyone's happy :). Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
