Re: [Xen-devel] [PATCH v2 3/3] x86emul: correct FPU code/data pointers and opcode handling

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 15/03/17 10:28, Jan Beulich wrote:
> Prevent leaking the hypervisor ones (stored by hardware during stub
> execution), at once making sure the guest sees correct values there.
> This piggybacks on the backout logic used to deal with write faults of
> FPU insns.
>
> Deliberately ignore the NO_FPU_SEL feature here: Honoring it would
> merely mean extra code with no benefit (once we XRSTOR state, the
> selector values will simply be lost anyway).
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel