Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754030AbcKONJd (ORCPT ); Tue, 15 Nov 2016 08:09:33 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48646 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751567AbcKONJa (ORCPT ); Tue, 15 Nov 2016 08:09:30 -0500 From: Eric Auger 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: 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 Subject: [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions Date: Tue, 15 Nov 2016 13:09:13 +0000 Message-Id: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 15 Nov 2016 13:09:29 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2218 Lines: 65 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