From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH 1/3] iommu/amd: Add logic to decode AMD IOMMU event flag Date: Tue, 2 Apr 2013 18:04:00 +0200 Message-ID: <20130402160400.GP30540@8bytes.org> References: <1364428283-2548-1-git-send-email-suravee.suthikulpanit@amd.com> <20130402143335.GB15687@8bytes.org> <20130402144037.GE5488@pd.tnic> <20130402150302.GF15687@8bytes.org> <20130402152956.GE4391@pd.tnic> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20130402152956.GE4391-fF5Pk5pvG8Y@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Borislav Petkov , suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org On Tue, Apr 02, 2013 at 05:29:56PM +0200, Borislav Petkov wrote: > On Tue, Apr 02, 2013 at 05:03:04PM +0200, Joerg Roedel wrote: > Good luck trying to get ASUS to fix anything in their BIOS :(. Hmm... > Can't we detect the SB IOAPIC some other way in this case? I can certainly write a patch that works around your particular BIOS bug. The problem is that such a fix will most certainly break other systems. Unfortunatly there is no reliable way to fixup the IO-APIC-ID->DEVID mapping at runtime when the BIOS messed it up. The only thing I can do is to check for potential problems and disable the intremap feature then, so that the system will at least boot. Joerg