On Wed, 2009-07-08 at 09:23 +0200, Alexander Graf wrote: > Well, the problem is that we can't have two ESIDs for the same EA in > the SLB. So what I tried was to have guest ESIDs and host ESIDs > (PAGE_OFFSET+) live in the same SLB by removing the most significant > bit of the guest ESID. I'll reply to that later when I understand what you are doing better. > Yikes. So pHyp restores SLB entries from a shadow? Sounds like I need > to mess with that one too :-(. Right. > I'm not really fond of all the SLB switching code in general. Best > case would probably be to have a host and guest shadow SLB in the RMA > that the real mode code can take to switch the _full_ SLB. > > That way we'd also get rid of the CONTEXT_GUEST stuff in the kernel > module, where we are in Linux, but have guest SLB entries active > already. Same comment as above :-) I'm sure together we can come up with something quite optimal but I need to catch up a bit first :-) > Any reason it doesn't work on Power3? :-). It definitely does not work > on iSeries, though the code could be made to work there FWIW. On Power3 you'd have to implement STAB support instead of SLB (get yourself a PowerPC Book3 pre-2.0 if that's available publically and you are masochist :-) On legacy iSeries, it's harder, you don't have access to real mode and the hypervisor is more invasive. I wouldn't bother with these. Any recent iSeries (POWER5 or later) uses pHyp and so shouldn't be a problem. Cheers Ben. -- 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
