Re: [Xen-devel] [PATCH v2] x86/32on64: don't modify guest descriptors without need

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 30/09/16 14:36, Jan Beulich wrote:
> System gates with type 0 shouldn't have what might be their DPL altered
> - such descriptors can't be used anyway without incurring a #GP, and
> hence adjusting its DPL is only risking to confuse the guest.
>
> Also bail right away for non-present descriptors - no need to write
> back anything in that case.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

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

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