Messages in this thread | | | Date | Thu, 30 Jun 2022 09:17:26 -0700 | Subject | Re: [PATCH v2 1/1] Documentation/x86: Add the AMX enabling example | From | "Chang S. Bae" <> |
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On 6/30/2022 9:07 AM, Luck, Tony wrote: >> But these state components are architectural. While this can help >> userspace anyway, saying "XSTATE component" here and on the man-page is >> probably it as they are already defined in the x86 spec. > > An application writer can't use: > > # include {x86 spec}" > > to get these values ... if applications need them to find out if AMX is present, > and to enable it, then they need an API.
Yeah, you're right.
> > Maybe your example code should just be a library routine? So application writers > can just do: > > if (!intel_amx_enable()) { > error message, or fall back to non-AMX implementation > } > > without having to worry about those #defines.
I guess we cannot assume this. Given the arch_prctl() options, they can do this by themselves.
Let me include those defines on the next version.
Thanks, Chang
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