From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0EF0C3A59F for ; Thu, 29 Aug 2019 09:04:03 +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 C4232215EA for ; Thu, 29 Aug 2019 09:04:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C4232215EA 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:47058 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i3GLa-0003Xt-E3 for qemu-devel@archiver.kernel.org; Thu, 29 Aug 2019 05:04:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33174) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i3GJb-0001q8-PT for qemu-devel@nongnu.org; Thu, 29 Aug 2019 05:02:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i3GJZ-0000z5-F5 for qemu-devel@nongnu.org; Thu, 29 Aug 2019 05:01:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57936) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i3GJW-0000vL-JA; Thu, 29 Aug 2019 05:01:54 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C2B5183F3B; Thu, 29 Aug 2019 09:01:53 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-105.ams2.redhat.com [10.36.116.105]) by smtp.corp.redhat.com (Postfix) with ESMTP id 850F61001B09; Thu, 29 Aug 2019 09:01:43 +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, pbonzini@redhat.com, alex.williamson@redhat.com Date: Thu, 29 Aug 2019 11:01:39 +0200 Message-Id: <20190829090141.21821-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Thu, 29 Aug 2019 09:01:53 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v5 0/2] VFIO/SMMUv3: Fail on VFIO/HW nested paging detection 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: aik@ozlabs.ru, peterx@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" As of today when a guest is assigned with a host PCI device and an SMMUv3, VFIO calls memory_region_iommu_replay() default implementation. This translates the whole address range and completely stalls the execution. As VFIO/SMMUv3 integration is not supported yet (it requires SMMUv3 HW nested paging), let's recognize this situation and fail. Best Regards Eric This series can be found at: https://github.com/eauger/qemu/tree/v4.1.0_smmu_vfio_fail_v5 History: v4 -> v5: - v4 patches: 1, 4, 5 were upstreamed separately - IOMMU_ATTR_HW_NESTED_PAGING renamed into IOMMU_ATTR_NEED_HW_NESTED_PAGING v3 -> v4: - see individual patches v2 -> v3: - squash IOMMU_ATTR_VFIO_NESTED introduction and SMMUv3 usage - assert when recognizing VFIO/NESTED case - collect R-bs v1 -> v2: - Added "memory: Remove unused memory_region_iommu_replay_all()" & "hw/arm/smmuv3: Log a guest error when decoding an invalid STE" - do not attempt to implement replay Cb but rather remove the call in case it is not needed - explain why we do not remove other log messages on config decoding Eric Auger (2): memory: Add IOMMU_ATTR_NEED_HW_NESTED_PAGING IOMMU memory region attribute hw/vfio/common: Fail on VFIO/HW nested paging detection hw/arm/smmuv3.c | 12 ++++++++++++ hw/vfio/common.c | 10 ++++++++++ include/exec/memory.h | 8 +++++++- 3 files changed, 29 insertions(+), 1 deletion(-) --=20 2.20.1