From mboxrd@z Thu Jan 1 00:00:00 1970 From: Barde Kaushik 00901718 Subject: Re: feature suggestion: DMAR table emulation for Xen Date: Fri, 14 May 2010 07:25:41 -0700 Message-ID: References: <4BEC0928.8090604@invisiblethingslab.com> <987664A83D2D224EAE907B061CE93D53C60548F1@orsmsx505.amr.corp.intel.com> <4BED1672.6000903@invisiblethingslab.com> <4BED2304.2080105@invisiblethingslab.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT Return-path: In-reply-to: <4BED2304.2080105@invisiblethingslab.com> Content-language: en Content-disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Joanna Rutkowska Cc: "Han, Weidong" , "Cihula, Joseph" , "Kay, Allen M" , "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org Sure, you can but I think, you may have issues if RMRR reports both existent and non-existent device scopes, and if ignored, existent device may be impacted along with non-existent one's. -Kaushik ****************************************************************************************** This email and its attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. Any use of the information contained here in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this email in error, please notify the sender by phone or email immediately and delete it! ***************************************************************************************** ----- Original Message ----- From: Joanna Rutkowska Date: Friday, May 14, 2010 3:13 am Subject: Re: [Xen-devel] feature suggestion: DMAR table emulation for Xen To: Barde Kaushik 00901718 Cc: "Kay, Allen M" , "Cihula, Joseph" , "xen-devel@lists.xensource.com" , "Han, Weidong" > On 05/14/2010 11:41 AM, Barde Kaushik 00901718 wrote: > > << So, if we took a DMAR from a platform, say PM45+ICH9M w/ Intel > > BIOS, it should also work fine on any other laptop with this chipset > > (and probably other variants too), just minus the potential > > BIOS-specific-dirty-tricks...? > >>> > > > > Bringing-up mobile variants with same base BIOS may not work, at > > least in my experience, as OEMs tend to add various custom features > > (GPIO). These features may to over-ride RMRR assumptions from base > > BIOS. This tends to be the most prominant cause behind RMRR issues. > > > And what would happen if we ignore RMRRs on such a system? > > j. > >