From patchwork Fri Mar 20 16:58:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 11449895 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E23CE1874 for ; Fri, 20 Mar 2020 16:59:52 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B61CC20724 for ; Fri, 20 Mar 2020 16:59:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="P9b6OcbR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B61CC20724 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:56198 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jFKzv-0003TM-RD for patchwork-qemu-devel@patchwork.kernel.org; Fri, 20 Mar 2020 12:59:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53851) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jFKzI-0002R5-WE for qemu-devel@nongnu.org; Fri, 20 Mar 2020 12:59:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jFKzH-0003pw-3e for qemu-devel@nongnu.org; Fri, 20 Mar 2020 12:59:12 -0400 Received: from us-smtp-delivery-74.mimecast.com ([216.205.24.74]:25841) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jFKzG-0003pA-PJ for qemu-devel@nongnu.org; Fri, 20 Mar 2020 12:59:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1584723550; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=FEDfEuVxkMtr1RXUfx7aDAWkicAcG614Y6zaNEL5rAA=; b=P9b6OcbR9+yi2jCTRxgKCrMXKZ/CyAJMRoW+/IE2qhBupx3nGjl5CPb1U8g4BO0bNgTJyR MhoK0PbJOwGq5zU4EvaQT15eGwYkxRIteHD/kPnf3KWYT3pwI891qoBG3FUVi6fYF2Wd1O 5as+H+6d+Wl46wp6GXplRVifSs51lX0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-303-5H2nNXgPN3-F8t_XXGQjlQ-1; Fri, 20 Mar 2020 12:59:08 -0400 X-MC-Unique: 5H2nNXgPN3-F8t_XXGQjlQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E7C4A18C8C00; Fri, 20 Mar 2020 16:59:05 +0000 (UTC) Received: from laptop.redhat.com (ovpn-113-142.ams2.redhat.com [10.36.113.142]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4141E19757; Fri, 20 Mar 2020 16:58:47 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, mst@redhat.com, alex.williamson@redhat.com, jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com Subject: [RFC v6 00/24] vSMMUv3/pSMMUv3 2 stage VFIO integration Date: Fri, 20 Mar 2020 17:58:16 +0100 Message-Id: <20200320165840.30057-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 216.205.24.74 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jean-philippe@linaro.org, tnowicki@marvell.com, maz@kernel.org, zhangfei.gao@foxmail.com, peterx@redhat.com, shameerali.kolothum.thodi@huawei.com, zhangfei.gao@linaro.org, bbhushan2@marvell.com, will@kernel.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Up to now vSMMUv3 has not been integrated with VFIO. VFIO integration requires to program the physical IOMMU consistently with the guest mappings. However, as opposed to VTD, SMMUv3 has no "Caching Mode" which allows easy trapping of guest mappings. This means the vSMMUV3 cannot use the same VFIO integration as VTD. However SMMUv3 has 2 translation stages. This was devised with virtualization use case in mind where stage 1 is "owned" by the guest whereas the host uses stage 2 for VM isolation. This series sets up this nested translation stage. It only works if there is one physical SMMUv3 used along with QEMU vSMMUv3 (in other words, it does not work if there is a physical SMMUv2). - We force the host to use stage 2 instead of stage 1, when we detect a vSMMUV3 is behind a VFIO device. For a VFIO device without any virtual IOMMU, we still use stage 1 as many existing SMMUs expect this behavior. - We use PCIPASIDOps to propage guest stage1 config changes on STE (Stream Table Entry) changes. - We implement a specific UNMAP notifier that conveys guest IOTLB invalidations to the host - We register MSI IOVA/GPA bindings to the host so that this latter can build a nested stage translation - As the legacy MAP notifier is not called anymore, we must make sure stage 2 mappings are set. This is achieved through another prereg memory listener. - Physical SMMU stage 1 related faults are reported to the guest via en eventfd mechanism and exposed trhough a dedicated VFIO-PCI region. Then they are reinjected into the guest. Best Regards Eric This series can be found at: https://github.com/eauger/qemu/tree/v4.2.0-2stage-rfcv6 Kernel Dependencies: [1] [PATCH v10 00/11] SMMUv3 Nested Stage Setup (VFIO part) [2] [PATCH v10 00/13] SMMUv3 Nested Stage Setup (IOMMU part) branch at: https://github.com/eauger/linux/tree/will-arm-smmu-updates-2stage-v10 History: v5 -> v6: - just rebase work v4 -> v5: - Use PCIPASIDOps for config update notifications - removal of notification for MSI binding which is not needed anymore - Use a single fault region - use the specific interrupt index v3 -> v4: - adapt to changes in uapi (asid cache invalidation) - check VFIO_PCI_DMA_FAULT_IRQ_INDEX is supported at kernel level before attempting to set signaling for it. - sync on 5.2-rc1 kernel headers + Drew's patch that imports sve_context.h - fix MSI binding for MSI (not MSIX) - fix mingw compilation v2 -> v3: - rework fault handling - MSI binding registration done in vfio-pci. MSI binding tear down called on container cleanup path - leaf parameter propagated v1 -> v2: - Fixed dual assignment (asid now correctly propagated on TLB invalidations) - Integrated fault reporting Eric Auger (23): update-linux-headers: Import iommu.h header update against 5.6.0-rc3 and IOMMU/VFIO nested stage APIs memory: Add IOMMU_ATTR_VFIO_NESTED IOMMU memory region attribute memory: Add IOMMU_ATTR_MSI_TRANSLATE IOMMU memory region attribute memory: Introduce IOMMU Memory Region inject_faults API memory: Add arch_id and leaf fields in IOTLBEntry iommu: Introduce generic header vfio: Force nested if iommu requires it vfio: Introduce hostwin_from_range helper vfio: Introduce helpers to DMA map/unmap a RAM section vfio: Set up nested stage mappings vfio: Pass stage 1 MSI bindings to the host vfio: Helper to get IRQ info including capabilities vfio/pci: Register handler for iommu fault vfio/pci: Set up the DMA FAULT region vfio/pci: Implement the DMA fault handler hw/arm/smmuv3: Advertise MSI_TRANSLATE attribute hw/arm/smmuv3: Store the PASID table GPA in the translation config hw/arm/smmuv3: Fill the IOTLBEntry arch_id on NH_VA invalidation hw/arm/smmuv3: Fill the IOTLBEntry leaf field on NH_VA invalidation hw/arm/smmuv3: Pass stage 1 configurations to the host hw/arm/smmuv3: Implement fault injection hw/arm/smmuv3: Allow MAP notifiers Liu Yi L (1): pci: introduce PCIPASIDOps to PCIDevice hw/arm/smmuv3.c | 189 ++++++++++-- hw/arm/trace-events | 3 +- hw/pci/pci.c | 34 +++ hw/vfio/common.c | 506 +++++++++++++++++++++++++------- hw/vfio/pci.c | 267 ++++++++++++++++- hw/vfio/pci.h | 9 + hw/vfio/trace-events | 9 +- include/exec/memory.h | 49 +++- include/hw/arm/smmu-common.h | 1 + include/hw/iommu/iommu.h | 28 ++ include/hw/pci/pci.h | 11 + include/hw/vfio/vfio-common.h | 16 + linux-headers/COPYING | 2 + linux-headers/asm-x86/kvm.h | 1 + linux-headers/linux/iommu.h | 375 +++++++++++++++++++++++ linux-headers/linux/vfio.h | 109 ++++++- memory.c | 10 + scripts/update-linux-headers.sh | 2 +- 18 files changed, 1478 insertions(+), 143 deletions(-) create mode 100644 include/hw/iommu/iommu.h create mode 100644 linux-headers/linux/iommu.h