On 09/03/18 14:18, Jan Beulich wrote: > Instead of "syncing" the live value to what mmu_cr4_features has, make > sure vCPU-s run with the value most recently loaded into %cr4, such that > after the next VM exit we continue to run with the intended value rather > than a possibly stale one. > > Signed-off-by: Jan Beulich <jbeul...@suse.com> > --- > TBD: Is the conditional really worthwhile, i.e. is the VMWRITE perhaps > not meaningfully more expensive than the VMREAD?
Which bits are you worried about here? We play with %cr4 quite a bit in PV context, but we shouldn't be changing after boot in HVM context. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
