Re: [RFC PATCH 00/10] x86: Allocate AVX512 xstate ondemand

[Dave Hansen]

On 12/2/21 4:45 PM, Jiaxun Yang wrote:
> 在2021年12月3日十二月 上午12:40，Dave Hansen写道：
>> On 12/2/21 4:36 PM, Jiaxun Yang wrote:
>>> Also we are going to have heterogeneous processors that
>>> only some cores support AVX512, it can be helpful when
>>> dealing with such processors.
>> Really?  Which x86 vendor is doing that?
> Clear lower two bits of MSR 0xAF on Alder Lake give me some suprise :-)

I honestly don't know what you're talking about.  Does poking that MSR
allowing AVX512 instructions to be executed on cores where it was
otherwise disabled?  That's entertaining, but it's far from "supported"
or even support*able* in Linux.