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

[Jiaxun Yang]

在2021年12月3日十二月 上午12:58，Dave Hansen写道：
> 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.

If it's improper I'll drop the statement in commit message :-)

Yep, I'm entertaining with kernel hackcing.

Thanks

-- 
- Jiaxun