On May 31, 2011, at 8:50 AM, Alexander Graf wrote: > > 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 :). > Be aware that on 970s (off the top of my head): - did not have the LPCR architected so you'll have to access individual HID registers. - old style RMOR is supported, not VRMA - no MEDiated interrupt -jx > > Alex > > -- > To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- 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
