linux-kernel - Re: [RFC] AMD VM crashing on deferred memory error injection

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Message-ID: <20260209175349.GEaYofLVlR2MG7CFyS@fat_crate.local>
Date: Mon, 9 Feb 2026 18:53:49 +0100
From: Borislav Petkov <bp@...en8.de>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: William Roche <william.roche@...cle.com>,
	"Ghannam, Yazen" <Yazen.Ghannam@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
	"x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
	"Allen, John" <John.Allen@....com>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jane Chu <jane.chu@...cle.com>
Subject: Re: [RFC] AMD VM crashing on deferred memory error injection

On Mon, Feb 09, 2026 at 05:38:58PM +0000, Luck, Tony wrote:
> > This enablement is not meant for VM use. Why do we care about injecting hw
> > errors in a guest?
> 
> The guest may be able to just kill a process and keep running.

I have heard about injecting errors into qemu/kvm perhaps a decade ago and
nothing ever since. Either it has been working perfectly since then or no one
cares until now.

So the guest "may" be able to do a lot of things - question is, do we support
it and how do we test for it in the future so that it doesn't break.

Thx.

-- 
Regards/Gruss,
    Boris.

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