Re: [PATCH 02/22] x86/srso: Set CPUID feature bits independently of bug or mitigation status

From: Borislav Petkov
Date: Thu Aug 24 2023 - 00:31:01 EST


On Wed, Aug 23, 2023 at 01:22:34PM +0100, Andrew Cooper wrote:
> In my previous reply, I explained why this goes wrong when Linux ignores
> the CPUID bit provided by the hypervisor and decides to probe manually.

Send a patch and explain in its commit message *why* this is needed.

> No.

Hell yeah!

How do you expect us to support use cases we don't know about?!

> You don't get to take my code, break it when integrating it into Linux,
> then dismiss the bug as something hypothetical that you don't want to fix.

I have no clue what you're talking about but it sounds like
a misunderstanding. All I'm saying is, the live migration use cases the
kernel should support, should be documented first. If there's no
documentation for them, *then* you have hypothetical.

So patches explaining what we're supporting are welcome.

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette