From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757310AbdEGWkc (ORCPT ); Sun, 7 May 2017 18:40:32 -0400 Received: from mail-pg0-f43.google.com ([74.125.83.43]:35283 "EHLO mail-pg0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754847AbdEGWkb (ORCPT ); Sun, 7 May 2017 18:40:31 -0400 MIME-Version: 1.0 In-Reply-To: <20170505233620.eka5md5mmnp4ituz@pd.tnic> References: <1493294823-9315-1-git-send-email-bhe@redhat.com> <20170505204214.GB5225@codeblueprint.co.uk> <20170505233620.eka5md5mmnp4ituz@pd.tnic> From: Bhupesh Sharma Date: Mon, 8 May 2017 00:07:18 +0530 Message-ID: Subject: Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when kalsr enabled To: Borislav Petkov Cc: Matt Fleming , Baoquan He , linux-kernel@vger.kernel.org, Dave Young , Ard Biesheuvel , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Thomas Garnier , Kees Cook , x86@kernel.org, linux-efi@vger.kernel.org, Alex Thorlton , Russ Anderson , Dimitri Sivanich , Mike Travis Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, May 6, 2017 at 5:06 AM, Borislav Petkov wrote: > On Fri, May 05, 2017 at 09:42:14PM +0100, Matt Fleming wrote: >> (Including the folks from SGI since this was hit on a UV system) > > Wasn't there a BIOS fix supplied at some point which obviated the need > to boot with efi=old_map on SGI boxes? > AFAICR, the bios fixes were provided only for SGI boxes with BIOS version greater than or equal to UV2 (so upstream with recent bios works on UV2, UV3, and UV4 hardware platforms, both with old and new mapping, with new mapping being the default), however the UV1 platforms still use efi=old_map Also as mentioned above since commit caef78b6cdeddf4ad364f95910bba6b43b8eb9bf fixed the efi=old_map support on UV systems even with new bios, they should ideally all boot up properly in upstream both with 'nokaslr' and without 'nokaslr' in the bootargs when efi=old_map is used. Regards, Bhupesh From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bhupesh Sharma Subject: Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when kalsr enabled Date: Mon, 8 May 2017 00:07:18 +0530 Message-ID: References: <1493294823-9315-1-git-send-email-bhe@redhat.com> <20170505204214.GB5225@codeblueprint.co.uk> <20170505233620.eka5md5mmnp4ituz@pd.tnic> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: <20170505233620.eka5md5mmnp4ituz-fF5Pk5pvG8Y@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Borislav Petkov Cc: Matt Fleming , Baoquan He , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Dave Young , Ard Biesheuvel , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Thomas Garnier , Kees Cook , x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Alex Thorlton , Russ Anderson , Dimitri Sivanich , Mike Travis List-Id: linux-efi@vger.kernel.org On Sat, May 6, 2017 at 5:06 AM, Borislav Petkov wrote: > On Fri, May 05, 2017 at 09:42:14PM +0100, Matt Fleming wrote: >> (Including the folks from SGI since this was hit on a UV system) > > Wasn't there a BIOS fix supplied at some point which obviated the need > to boot with efi=old_map on SGI boxes? > AFAICR, the bios fixes were provided only for SGI boxes with BIOS version greater than or equal to UV2 (so upstream with recent bios works on UV2, UV3, and UV4 hardware platforms, both with old and new mapping, with new mapping being the default), however the UV1 platforms still use efi=old_map Also as mentioned above since commit caef78b6cdeddf4ad364f95910bba6b43b8eb9bf fixed the efi=old_map support on UV systems even with new bios, they should ideally all boot up properly in upstream both with 'nokaslr' and without 'nokaslr' in the bootargs when efi=old_map is used. Regards, Bhupesh