Re: [PATCH v19 06/25] x86/cet: Add control-protection fault handler

Yu, Yu-cheng
2021-02-08T18:50:16Z

On 2/8/2021 10:20 AM, Borislav Petkov wrote:
> On Fri, Feb 05, 2021 at 10:00:21AM -0800, Yu, Yu-cheng wrote:
>> The ratelimit here is only for #CP, and its rate is not counted together
>> with other types of faults. If a task gets here, it will exit. The only
>> condition the ratelimit will trigger is when multiple tasks hit #CP at once,
>> which is unlikely. Are you suggesting that we do not need the ratelimit
>> here?
>
> I'm trying to first find out why is it there.
>
> Is this something you've hit during testing and thought, oh well, this
> needs a ratelimit or was it added just because?
>

I have not run into the situation. Initially it was there because other
faults have it. When you asked, I went through it and put out my
reasoning. I think it still makes sense to keep it.

--
Yu-cheng