linux-kernel - Re: [PATCH -v2] x86/retpoline: Ensure default return thunk isn't used at runtime

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Message-ID: <20240403204113.GLZg2-6f0nH0Ne9CQt@fat_crate.local>
Date: Wed, 3 Apr 2024 22:41:13 +0200
From: Borislav Petkov <bp@...en8.de>
To: Klara Modin <klarasmodin@...il.com>
Cc: Josh Poimboeuf <jpoimboe@...nel.org>,
	"Kaplan, David" <David.Kaplan@....com>,
	Ingo Molnar <mingo@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tip-commits@...r.kernel.org" <linux-tip-commits@...r.kernel.org>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	"x86@...nel.org" <x86@...nel.org>,
	David Howells <dhowells@...hat.com>
Subject: Re: [PATCH -v2] x86/retpoline: Ensure default return thunk isn't
 used at runtime

On Wed, Apr 03, 2024 at 10:26:19PM +0200, Klara Modin wrote:
> Probably, I don't have much knowledge about this stuff. The machine can at
> least be useful for testing still :)

I wouldn't use it if I were you as it wouldn't even justify the
electricity wasted. No one cares about 32-bit x86 kernels anymore and we
barely keep them alive.

It'll be a lot more helpful if you'd test 64-bit kernels on 64-bit hw.

:-)

Thx.

-- 
Regards/Gruss,
    Boris.

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