Re: [Xen-devel] [PATCH v2 1/2] x86: improve NOP use for AMD CPUs

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 18/12/17 16:50, Jan Beulich wrote:
> For Fam10 and later AMD recommends using the "long" NOP forms. Re-write
> the present Intel code into switch() statements and add AMD logic.
>
> Default to "long" forms (which all 64-bit CPUs are supposed to
> recognize), overriding to the K8 flavor on those few (older) CPUs.
>
> This at the same time brings us in line again in this regard with
> current Linux.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

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

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