Re: [RFC PATCH v3 1/2] x86: cpu/bugs: add AMD ERAPS support; hardware flushes RSB

[Dave Hansen]

On 12/2/24 10:09, Amit Shah wrote:
> I can still include the summary of the discussion in this patch - I
> just feel it isn't necessary with the rework.

It's necessary.

There's a new hardware feature. You want it to replace a software
sequence in certain situations. You have to make an actual, coherent
argument argument as to why the hardware feature is a suitable replacement.

For instance (and I'm pretty sure we've gone over this more than once),
the changelog here still makes the claim that a "context switch" and a
"mov-to-CR3" are the same thing.