>>> On 20.10.15 at 16:27, <boris.ostrov...@oracle.com> wrote: > On 10/20/2015 09:43 AM, Jan Beulich wrote: >>>>> On 20.10.15 at 15:22, <boris.ostrov...@oracle.com> wrote: >>> The reason I think its this commit is that RAX, RDX and RCX look very >>> much like arguments to xsetbv (which xstate_enable_boot_cpu() executes) >>> and RAX value is 0x1f, which has two new bits that this commit defined. >> That would be the two MPX related bits, yet us (luckily) white listing >> leaf 7 in pv_cpuid(), it is quite easy to validate that we don't expose >> this feature to PV(H) guests. > > Oh, so something like > > cpuid=['0x7:ebx=xxxxxxxxxxxxxxxxx0xxxxxxxxxxxxxx'] > > (bit 14 as zero) for John to try then.
He might try it, but as per what I've said this shouldn't make a difference for PV(H) guests. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
