Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752559AbcKRIdy (ORCPT ); Fri, 18 Nov 2016 03:33:54 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42446 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751180AbcKRIdv (ORCPT ); Fri, 18 Nov 2016 03:33:51 -0500 Subject: Re: [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions To: Bharat Bhushan , "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" , "joro@8bytes.org" , "tglx@linutronix.de" , "jason@lakedaemon.net" , "linux-arm-kernel@lists.infradead.org" References: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> Cc: "drjones@redhat.com" , "kvm@vger.kernel.org" , "punit.agrawal@arm.com" , "linux-kernel@vger.kernel.org" , "iommu@lists.linux-foundation.org" , "pranav.sawargaonkar@gmail.com" From: Auger Eric Message-ID: <40ae2d41-c744-49e6-d51d-8cba41a4b069@redhat.com> Date: Fri, 18 Nov 2016 09:33:44 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 18 Nov 2016 08:33:50 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3873 Lines: 109 Hi Bharat, On 18/11/2016 06:34, Bharat Bhushan wrote: > Hi Eric, > > Have you sent out QEMU side patches based on this new approach? In case I missed please point me the patches? Upstream QEMU works fine for PCIe/MSI passthrough on ARM since mach virt address space does not collide with fixed MSI region. Thanks Eric > > Thanks > -Bharat > >> -----Original Message----- >> From: iommu-bounces@lists.linux-foundation.org [mailto:iommu- >> bounces@lists.linux-foundation.org] On Behalf Of Eric Auger >> Sent: Tuesday, November 15, 2016 6:39 PM >> To: eric.auger@redhat.com; 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; joro@8bytes.org; tglx@linutronix.de; >> jason@lakedaemon.net; linux-arm-kernel@lists.infradead.org >> Cc: drjones@redhat.com; kvm@vger.kernel.org; punit.agrawal@arm.com; >> linux-kernel@vger.kernel.org; iommu@lists.linux-foundation.org; >> pranav.sawargaonkar@gmail.com >> Subject: [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and >> IOVA reserved regions >> >> Following LPC discussions, we now report reserved regions through iommu- >> group sysfs reserved_regions attribute file. >> >> Reserved regions are populated through the IOMMU get_resv_region >> callback (former get_dm_regions), now implemented by amd-iommu, intel- >> iommu and arm-smmu. >> >> The intel-iommu reports the [FEE0_0000h - FEF0_000h] MSI window as an >> IOMMU_RESV_NOMAP reserved region. >> >> arm-smmu reports the MSI window (arbitrarily located at 0x8000000 and 1MB >> large) and the PCI host bridge windows. >> >> The series integrates a not officially posted patch from Robin: >> "iommu/dma: Allow MSI-only cookies". >> >> This series currently does not address IRQ safety assessment. >> >> Best Regards >> >> Eric >> >> Git: complete series available at >> https://github.com/eauger/linux/tree/v4.9-rc5-reserved-rfc-v3 >> >> History: >> RFC v2 -> v3: >> - switch to an iommu-group sysfs API >> - use new dummy allocator provided by Robin >> - dummy allocator initialized by vfio-iommu-type1 after enumerating >> the reserved regions >> - at the moment ARM MSI base address/size is left unchanged compared >> to v2 >> - we currently report reserved regions and not usable IOVA regions as >> requested by Alex >> >> RFC v1 -> v2: >> - fix intel_add_reserved_regions >> - add mutex lock/unlock in vfio_iommu_type1 >> >> >> Eric Auger (10): >> iommu/dma: Allow MSI-only cookies >> iommu: Rename iommu_dm_regions into iommu_resv_regions >> iommu: Add new reserved IOMMU attributes >> iommu: iommu_alloc_resv_region >> iommu: Do not map reserved regions >> iommu: iommu_get_group_resv_regions >> iommu: Implement reserved_regions iommu-group sysfs file >> iommu/vt-d: Implement reserved region get/put callbacks >> iommu/arm-smmu: Implement reserved region get/put callbacks >> vfio/type1: Get MSI cookie >> >> drivers/iommu/amd_iommu.c | 20 +++--- >> drivers/iommu/arm-smmu.c | 52 +++++++++++++++ >> drivers/iommu/dma-iommu.c | 116 ++++++++++++++++++++++++++---- >> --- >> drivers/iommu/intel-iommu.c | 50 ++++++++++---- >> drivers/iommu/iommu.c | 141 >> ++++++++++++++++++++++++++++++++++++---- >> drivers/vfio/vfio_iommu_type1.c | 26 ++++++++ >> include/linux/dma-iommu.h | 7 ++ >> include/linux/iommu.h | 49 ++++++++++---- >> 8 files changed, 391 insertions(+), 70 deletions(-) >> >> -- >> 1.9.1 >> >> _______________________________________________ >> iommu mailing list >> iommu@lists.linux-foundation.org >> https://lists.linuxfoundation.org/mailman/listinfo/iommu > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >