Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752018AbdHPM5T (ORCPT ); Wed, 16 Aug 2017 08:57:19 -0400 Received: from mail-wr0-f176.google.com ([209.85.128.176]:34545 "EHLO mail-wr0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751522AbdHPM5R (ORCPT ); Wed, 16 Aug 2017 08:57:17 -0400 Date: Wed, 16 Aug 2017 13:57:15 +0100 From: Matt Fleming To: Mark Rutland Cc: Will Deacon , Ard Biesheuvel , Andy Lutomirski , Sai Praneeth Prakhya , Peter Zijlstra , "linux-efi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , joeyli , Borislav Petkov , "Michael S. Tsirkin" , "Neri, Ricardo" , "Ravi V. Shankar" Subject: Re: [PATCH 3/3] x86/efi: Use efi_switch_mm() rather than manually twiddling with cr3 Message-ID: <20170816125715.GB3384@codeblueprint.co.uk> References: <1502824706-30762-1-git-send-email-sai.praneeth.prakhya@intel.com> <1502824706-30762-4-git-send-email-sai.praneeth.prakhya@intel.com> <20170816095338.GB17270@leverpostej> <20170816100709.GG12845@arm.com> <20170816110321.GC17270@leverpostej> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170816110321.GC17270@leverpostej> User-Agent: Mutt/1.5.24+42 (6e565710a064) (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 286 Lines: 7 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.