From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put callbacks Date: Fri, 6 Jan 2017 13:46:31 +0100 Message-ID: <20170106124631.GP17255@8bytes.org> References: <1483643086-2883-1-git-send-email-eric.auger@redhat.com> <1483643086-2883-9-git-send-email-eric.auger@redhat.com> <20170106110131.GM17255@8bytes.org> <36bac0a9-89a6-ff7b-1870-a795a4f57700@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <36bac0a9-89a6-ff7b-1870-a795a4f57700-H+wXaHxf7aLQT0dZR+AlfA@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: Auger Eric Cc: drjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, marc.zyngier-5wv7dgnIgG8@public.gmane.org, punit.agrawal-5wv7dgnIgG8@public.gmane.org, will.deacon-5wv7dgnIgG8@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, geethasowjanya.akula-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, pranav.sawargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, shankerd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, gpkulkarni-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, christoffer.dall-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, eric.auger.pro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org List-Id: iommu@lists.linux-foundation.org On Fri, Jan 06, 2017 at 12:45:54PM +0100, Auger Eric wrote: > On 06/01/2017 12:01, Joerg Roedel wrote: > > On Thu, Jan 05, 2017 at 07:04:36PM +0000, Eric Auger wrote: > > That is different from what AMD does, can you also report the RMRR > > regions for the device here (as direct-map regions)? > > if I return RMRR regions as direct mapped regions, > iommu_group_create_direct_mappings will perform the 1-1 mapping. No, this will not happen until the Intel IOMMU driver returns valid IOMMU_DOMAIN_DMA type domains. > I am not familiar with the intel-iommu code but I guess this job > currently is done in the intel driver: > iommu_prepare_rmrr_dev -> iommu_prepare_identity_map > ->domain_prepare_identity_map -> iommu_domain_identity_map? Right, this is done in the Intel driver atm. Joerg From mboxrd@z Thu Jan 1 00:00:00 1970 From: joro@8bytes.org (Joerg Roedel) Date: Fri, 6 Jan 2017 13:46:31 +0100 Subject: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put callbacks In-Reply-To: <36bac0a9-89a6-ff7b-1870-a795a4f57700@redhat.com> References: <1483643086-2883-1-git-send-email-eric.auger@redhat.com> <1483643086-2883-9-git-send-email-eric.auger@redhat.com> <20170106110131.GM17255@8bytes.org> <36bac0a9-89a6-ff7b-1870-a795a4f57700@redhat.com> Message-ID: <20170106124631.GP17255@8bytes.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Jan 06, 2017 at 12:45:54PM +0100, Auger Eric wrote: > On 06/01/2017 12:01, Joerg Roedel wrote: > > On Thu, Jan 05, 2017 at 07:04:36PM +0000, Eric Auger wrote: > > That is different from what AMD does, can you also report the RMRR > > regions for the device here (as direct-map regions)? > > if I return RMRR regions as direct mapped regions, > iommu_group_create_direct_mappings will perform the 1-1 mapping. No, this will not happen until the Intel IOMMU driver returns valid IOMMU_DOMAIN_DMA type domains. > I am not familiar with the intel-iommu code but I guess this job > currently is done in the intel driver: > iommu_prepare_rmrr_dev -> iommu_prepare_identity_map > ->domain_prepare_identity_map -> iommu_domain_identity_map? Right, this is done in the Intel driver atm. Joerg From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1032164AbdAFMrg (ORCPT ); Fri, 6 Jan 2017 07:47:36 -0500 Received: from 8bytes.org ([81.169.241.247]:46532 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936088AbdAFMrX (ORCPT ); Fri, 6 Jan 2017 07:47:23 -0500 Date: Fri, 6 Jan 2017 13:46:31 +0100 From: Joerg Roedel To: Auger Eric Cc: eric.auger.pro@gmail.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, tglx@linutronix.de, jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, drjones@redhat.com, linux-kernel@vger.kernel.org, pranav.sawargaonkar@gmail.com, iommu@lists.linux-foundation.org, punit.agrawal@arm.com, diana.craciun@nxp.com, gpkulkarni@gmail.com, shankerd@codeaurora.org, bharat.bhushan@nxp.com, geethasowjanya.akula@gmail.com Subject: Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put callbacks Message-ID: <20170106124631.GP17255@8bytes.org> References: <1483643086-2883-1-git-send-email-eric.auger@redhat.com> <1483643086-2883-9-git-send-email-eric.auger@redhat.com> <20170106110131.GM17255@8bytes.org> <36bac0a9-89a6-ff7b-1870-a795a4f57700@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <36bac0a9-89a6-ff7b-1870-a795a4f57700@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 06, 2017 at 12:45:54PM +0100, Auger Eric wrote: > On 06/01/2017 12:01, Joerg Roedel wrote: > > On Thu, Jan 05, 2017 at 07:04:36PM +0000, Eric Auger wrote: > > That is different from what AMD does, can you also report the RMRR > > regions for the device here (as direct-map regions)? > > if I return RMRR regions as direct mapped regions, > iommu_group_create_direct_mappings will perform the 1-1 mapping. No, this will not happen until the Intel IOMMU driver returns valid IOMMU_DOMAIN_DMA type domains. > I am not familiar with the intel-iommu code but I guess this job > currently is done in the intel driver: > iommu_prepare_rmrr_dev -> iommu_prepare_identity_map > ->domain_prepare_identity_map -> iommu_domain_identity_map? Right, this is done in the Intel driver atm. Joerg