linux-kernel - RE: [PATCH 1/2] x86/mce: Disable preemption for CPER decoding

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Date:   Fri, 23 Jun 2023 15:44:06 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Yazen Ghannam <yazen.ghannam@....com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        Borislav Petkov <bp@...e.de>,
        "Raj, Ashok" <ashok.raj@...el.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>
Subject: RE: [PATCH 1/2] x86/mce: Disable preemption for CPER decoding

> But I don't know about m->cpuid. Mixing processor revisions is not 
> allowed on AMD systems, and I don't know about other vendors. So I'd 
> leave m->cpuid as global unless there's a strong case otherwise.

There is (or was) support for mixed stepping in the microcode update
code. Not sure if Boris and Ashok came to any agreement on keeping it.

-Tony