tl;dr? Somewhere in here are some actual questions which I will attempt to answer. Please try and be more concise in future.
On 16/03/16 20:08, Luis R. Rodriguez wrote: > Toshi noted a while ago as well that if BIOS/firmware enables MTRR but > the kernel does not have it enabled one issue might have been any > MTRRs set up by the BIOS and ensuring the mapping is respected, in > particular UC settings, this concern is raised above. Another issue > though is that the kernel would be "unable to verify if a large page > mapping is aligned with MTRRs" [3] This is not a relevant concern for Xen guests: PV guests do not support superpage mappings and HVM guests never see real MTRRs. David
