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SubjectRe: [GIT PULL] x86/urgent for v5.11-rc7
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> On Feb 9, 2021, at 10:09 AM, Linus Torvalds <torvalds@linux-foundation.org> wrote:
>
> On Tue, Feb 9, 2021 at 8:55 AM Andy Lutomirski <luto@amacapital.net> wrote:
>>
>> Or we hack up #CP to handle this case. I don’t quite know how I feel about this.
>
> I think that's the sane model - if we've replaced the instruction with
> 'int3', and we end up getting #CP due to that, just do the #BP
> handling.
>
> Anything else would just be insanely complicated, I feel.

The other model is “don’t do that then.”

I suppose a nice property of patching ENDBR to INT3 is that, not only is it atomic, but ENDBR is sort of a NOP, so we don’t need to replace the ENDBR with anything.

>
> Linus

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