From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
Subject: Re: [PATCH 3/3] x86/efi: Use efi_switch_mm() rather than manually
 twiddling with cr3
Date: Wed, 16 Aug 2017 13:57:15 +0100
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To: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
Cc: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>, Ard Biesheuvel <ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Sai Praneeth Prakhya <sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>, "linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, joeyli <jlee-IBi9RG/b67k@public.gmane.org>, Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>, "Michael S. Tsirkin" <mst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "Neri, Ricardo" <ricardo.neri-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, "Ravi V. Shankar" <ravi.v.shankar-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
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On Wed, 16 Aug, at 12:03:22PM, Mark Rutland wrote:
> 
> I'd expect we'd abort at a higher level, not taking any sample. i.e.
> we'd have the core overflow handler check in_funny_mm(), and if so, skip
> the sample, as with the skid case.

FYI, this is my preferred solution for x86 too.