From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Roedel, Joerg" Subject: Re: kvm PCI assignment & VFIO ramblings Date: Mon, 22 Aug 2011 14:55:02 +0200 Message-ID: <20110822125502.GF2079@amd.com> References: <20110803020422.GF29719@yookeroo.fritz.box> <4E3F9E33.5000706@redhat.com> <1312932258.4524.55.camel@bling.home> <1312944513.29273.28.camel@pasglop> <1313859105.6866.192.camel@x201.home> <4E51F782.7060005@redhat.com> <20110822104635.GC2079@amd.com> <4E5234B7.7000700@redhat.com> <20110822123651.GD2079@amd.com> <4E524EBB.8090603@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: Alex Williamson , chrisw , Alexey Kardashevskiy , "kvm@vger.kernel.org" , Paul Mackerras , Benjamin Herrenschmidt , qemu-devel , iommu , Anthony Liguori , "linux-pci@vger.kernel.org" , linuxppc-dev , "benve@cisco.com" To: Avi Kivity Return-path: Content-Disposition: inline In-Reply-To: <4E524EBB.8090603@redhat.com> Sender: linux-pci-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Mon, Aug 22, 2011 at 08:42:35AM -0400, Avi Kivity wrote: > On 08/22/2011 03:36 PM, Roedel, Joerg wrote: > > On the AMD IOMMU side this information is stored in the IVRS ACPI table. > > Not sure about the VT-d side, though. > > I see. There is no sysfs node representing it? No. It also doesn't exist as a 'struct pci_dev'. This caused problems in the AMD IOMMU driver in the past and I needed to fix that. There I know that from :) > I'd rather not add another meaningless identifier. Well, I don't think its really meaningless, but we need some way to communicate the information about device groups to userspace. Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from TX2EHSOBE004.bigfish.com (tx2ehsobe002.messaging.microsoft.com [65.55.88.12]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "Microsoft Secure Server Authority" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 53194B6F65 for ; Mon, 22 Aug 2011 22:55:11 +1000 (EST) Date: Mon, 22 Aug 2011 14:55:02 +0200 From: "Roedel, Joerg" To: Avi Kivity Subject: Re: kvm PCI assignment & VFIO ramblings Message-ID: <20110822125502.GF2079@amd.com> References: <20110803020422.GF29719@yookeroo.fritz.box> <4E3F9E33.5000706@redhat.com> <1312932258.4524.55.camel@bling.home> <1312944513.29273.28.camel@pasglop> <1313859105.6866.192.camel@x201.home> <4E51F782.7060005@redhat.com> <20110822104635.GC2079@amd.com> <4E5234B7.7000700@redhat.com> <20110822123651.GD2079@amd.com> <4E524EBB.8090603@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" In-Reply-To: <4E524EBB.8090603@redhat.com> Cc: Alexey Kardashevskiy , "kvm@vger.kernel.org" , Paul Mackerras , qemu-devel , iommu , chrisw , Alex Williamson , Anthony Liguori , "linux-pci@vger.kernel.org" , linuxppc-dev , "benve@cisco.com" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, Aug 22, 2011 at 08:42:35AM -0400, Avi Kivity wrote: > On 08/22/2011 03:36 PM, Roedel, Joerg wrote: > > On the AMD IOMMU side this information is stored in the IVRS ACPI table. > > Not sure about the VT-d side, though. > > I see. There is no sysfs node representing it? No. It also doesn't exist as a 'struct pci_dev'. This caused problems in the AMD IOMMU driver in the past and I needed to fix that. There I know that from :) > I'd rather not add another meaningless identifier. Well, I don't think its really meaningless, but we need some way to communicate the information about device groups to userspace. Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:47587) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QvUGa-0001RJ-TL for qemu-devel@nongnu.org; Mon, 22 Aug 2011 09:10:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QvUGW-0008P4-WD for qemu-devel@nongnu.org; Mon, 22 Aug 2011 09:10:12 -0400 Received: from tx2ehsobe002.messaging.microsoft.com ([65.55.88.12]:34735 helo=TX2EHSOBE004.bigfish.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QvUGW-0008Ok-Nv for qemu-devel@nongnu.org; Mon, 22 Aug 2011 09:10:08 -0400 Date: Mon, 22 Aug 2011 14:55:02 +0200 From: "Roedel, Joerg" Message-ID: <20110822125502.GF2079@amd.com> References: <20110803020422.GF29719@yookeroo.fritz.box> <4E3F9E33.5000706@redhat.com> <1312932258.4524.55.camel@bling.home> <1312944513.29273.28.camel@pasglop> <1313859105.6866.192.camel@x201.home> <4E51F782.7060005@redhat.com> <20110822104635.GC2079@amd.com> <4E5234B7.7000700@redhat.com> <20110822123651.GD2079@amd.com> <4E524EBB.8090603@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <4E524EBB.8090603@redhat.com> Subject: Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Avi Kivity Cc: Alexey Kardashevskiy , "kvm@vger.kernel.org" , Paul Mackerras , qemu-devel , iommu , chrisw , Alex Williamson , "linux-pci@vger.kernel.org" , linuxppc-dev , "benve@cisco.com" On Mon, Aug 22, 2011 at 08:42:35AM -0400, Avi Kivity wrote: > On 08/22/2011 03:36 PM, Roedel, Joerg wrote: > > On the AMD IOMMU side this information is stored in the IVRS ACPI table. > > Not sure about the VT-d side, though. > > I see. There is no sysfs node representing it? No. It also doesn't exist as a 'struct pci_dev'. This caused problems in the AMD IOMMU driver in the past and I needed to fix that. There I know that from :) > I'd rather not add another meaningless identifier. Well, I don't think its really meaningless, but we need some way to communicate the information about device groups to userspace. Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632