On Tue May 16, 2023 at 5:56 PM AEST, Frederic Barrat wrote: > > > On 15/05/2023 18:02, Nicholas Piggin wrote: > > POWER9 DD2.1 and earlier had significant limitations when running KVM, > > including lack of "mixed mode" MMU support (ability to run HPT and RPT > > mode on threads of the same core), and a translation prefetch issue > > which is worked around by disabling "AIL" mode for the guest. > > > > These processors are not widely available, and it's difficult to deal > > with all these quirks in qemu +/- KVM, so create a POWER9 DD2.2 CPU > > and make it the default POWER9 CPU. > > > > Signed-off-by: Nicholas Piggin <npig...@gmail.com> > > --- > > Reviewed-by: Frederic Barrat <fbar...@linux.ibm.com> > > Which makes me wonder if the P9 DD1 and P10 DD1 cpu definitions are > worth keeping, since we don't really try emulating the differences and > we don't support them in firmware/skiboot. The only place where we seem > to bother is in target/ppc/kvm.c and that's precisely what this patch is > trying to avoid.
+1. We could do a follow up as Cedric suggested. Thanks, Nick
