Re: [Xen-devel] [PATCH v3 2/5] x86: use PDEP/PEXT for maddr/direct-map-offset conversion when available

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 25.09.18 at 19:15, <andrew.cooper3@xxxxxxxxxx> wrote:
> I seem to recall you saying that the one system it was introduced for
> never shipped, at which point, why bother keeping the code around?

Well, I've said _I think_ they've never shipped.

Irrespective of this, another thought here to come to a middle
ground: What about restricting support for discontiguous memory
maps to the BIGMEM case? At which point we might consider
making BMI2 a prereq for that, eliminating the need for stub
functions, and using alternatives just to replace PDEP/PEXT with
MOV when possible.

Jan



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel