linux-kernel - RE: [PATCH 22/25] x86/mcheck: Do the init in one place

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Date:   Wed, 9 Nov 2016 18:37:23 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "rt@...utronix.de" <rt@...utronix.de>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "Thomas Gleixner" <tglx@...utronix.de>
Subject: RE: [PATCH 22/25] x86/mcheck: Do the init in one place

> That's why the hotplug callback mce_disable_cpu() doesn't fiddle with
> CR4 - it only clears the bits in MCi_CTL. And I think we should remain
> that way.

N.B. See vendor_disable_error_reporting() ... on Intel we don't clear MCi_CTL.

-Tony