linux-kernel - Re: WARNING in lmce_supported() during reboot.

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Message-ID: <628d6329-05cf-4bf1-b571-361d07b3266e@intel.com>
Date: Mon, 28 Oct 2024 08:46:05 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
 Kuniyuki Iwashima <kuniyu@...zon.com>, x86@...nel.org,
 linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Tony Luck <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Dave Hansen <dave.hansen@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>,
 Alex Graf <graf@...zon.de>
Subject: Re: WARNING in lmce_supported() during reboot.

On 10/25/24 19:33, Benjamin Herrenschmidt wrote:
> This is a KVM/Nitro guest, so the CPU is somewhat virtualized, but
> /proc/cpuinfo says: Intel(R) Xeon(R) Platinum 8124M CPU @ 3.00GHz

Oh, if it's a guest, I'd be 100% pointing fingers at some piece of the
VMM.  While it's possible that the guest kernel screwed this up, it's
not immediately obvious how it might do that.