On Thu, 2015-12-10 at 18:59 +0000, Andrew Cooper wrote: > On 07/12/15 09:16, Huaitong Han wrote: > > + > > + /* PKRU dom0 is always zero */ > > + if ( likely(!pte_pkeys) ) > > + return 0; > > This is not an architectural restriction (as far as I can tell). Xen > must never make assumptions about how a guest chooses to use a > feature. Yes, I will remove the code section.
On my test machine, writing non-zero value to PKRU domain 0 will lead to a GP fault, this is also conform to the usage scenario, and I will ask the intel architect the reason why SDM does not describe. If it is OK, I will send the other patch or new version patch to improve the efficiency of the code. > > ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
