linux-kernel - Re: [PATCH] x86/bugs: Default retbleed to =stuff when retpoline is auto enabled

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Message-ID: <20240213000206.ctuf4hrcplwg5him@desk>
Date: Mon, 12 Feb 2024 16:02:06 -0800
From: Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
To: Josh Poimboeuf <jpoimboe@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
	antonio.gomez.iglesias@...ux.intel.com,
	alyssa.milburn@...ux.intel.com, andrew.cooper3@...rix.com,
	linux-kernel@...r.kernel.org,
	Alyssa Milburn <alyssa.milburn@...el.com>
Subject: Re: [PATCH] x86/bugs: Default retbleed to =stuff when retpoline is
 auto enabled

On Fri, Feb 09, 2024 at 12:33:46PM -0800, Pawan Gupta wrote:
> > And what's the point of checking spectre_v2= anyway?  Shouldn't retbleed
> > be mitigated by default, independently of whatever the user may have
> > specified for Spectre v2?
> 
> @Borislav, what do you think about this approach?

Looks like there is no objection. I will send the next version with
retbleed mitigation enabled by default.