From patchwork Sun Apr 11 12:08:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 1464814 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=f7/xBOpD; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4FJ9xV2nLqz9sVw for ; Sun, 11 Apr 2021 22:22:54 +1000 (AEST) Received: from localhost ([::1]:46016 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lVZ76-00015t-DK for incoming@patchwork.ozlabs.org; Sun, 11 Apr 2021 08:22:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47406) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lVYvs-0000XH-Pc for qemu-devel@nongnu.org; Sun, 11 Apr 2021 08:11:18 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:41380) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lVYve-0002lS-HR for qemu-devel@nongnu.org; Sun, 11 Apr 2021 08:11:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618143054; 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: in-reply-to:in-reply-to:references:references; bh=N2Nn/8mZV6/42NfAO06vb++YOJeBPuhixqOGmTZa19A=; b=f7/xBOpDhAusE42ye9M2X0gL6L4aXigg/n4hPW7R6M3z3yFw+INHTpbZ4rEkR+LNa2DcXK pECRGHZ0yeTPG9JlnHTMGZcgAW7vVlluzbE+Z4lD0Q70Xe7QBZVO7aXGjru7YPxCM9G0hX o3xO/CWdlCwMTgdIqCUzHMlBO7EtR/k= 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-95--LDkPYHjOMmBAyGZIb8q7w-1; Sun, 11 Apr 2021 08:10:50 -0400 X-MC-Unique: -LDkPYHjOMmBAyGZIb8q7w-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id D56985B364; Sun, 11 Apr 2021 12:10:47 +0000 (UTC) Received: from laptop.redhat.com (ovpn-112-22.ams2.redhat.com [10.36.112.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id AB63310023B2; Sun, 11 Apr 2021 12:10:42 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, alex.williamson@redhat.com Subject: [RFC v9 07/29] memory: Add IOMMU_ATTR_VFIO_NESTED IOMMU memory region attribute Date: Sun, 11 Apr 2021 14:08:50 +0200 Message-Id: <20210411120912.15770-8-eric.auger@redhat.com> In-Reply-To: <20210411120912.15770-1-eric.auger@redhat.com> References: <20210411120912.15770-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eric.auger@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action 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: peter.maydell@linaro.org, jacob.jun.pan@linux.intel.com, jean-philippe@linaro.org, tn@semihalf.com, chenxiang66@hisilicon.com, jiangkunkun@huawei.com, shameerali.kolothum.thodi@huawei.com, nicoleotsuka@gmail.com, vivek.gautam@arm.com, vdumpa@nvidia.com, yi.l.liu@intel.com, peterx@redhat.com, zhangfei.gao@gmail.com, yuzenghui@huawei.com, zhukeqian1@huawei.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" We introduce a new IOMMU Memory Region attribute, IOMMU_ATTR_VFIO_NESTED that tells whether the virtual IOMMU requires HW nested paging for VFIO integration. Current Intel virtual IOMMU device supports "Caching Mode" and does not require 2 stages at physical level to be integrated with VFIO. However SMMUv3 does not implement such "caching mode" and requires to use HW nested paging. As such SMMUv3 is the first IOMMU device to advertise this attribute. Signed-off-by: Eric Auger --- include/exec/memory.h | 3 ++- hw/arm/smmuv3.c | 12 ++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/include/exec/memory.h b/include/exec/memory.h index 94b9157249..3af3cc1adb 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -273,7 +273,8 @@ typedef struct MemoryRegionClass { enum IOMMUMemoryRegionAttr { - IOMMU_ATTR_SPAPR_TCE_FD + IOMMU_ATTR_SPAPR_TCE_FD, + IOMMU_ATTR_VFIO_NESTED, }; /* diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c index a4436868ba..7166008ab0 100644 --- a/hw/arm/smmuv3.c +++ b/hw/arm/smmuv3.c @@ -1582,6 +1582,17 @@ static int smmuv3_notify_flag_changed(IOMMUMemoryRegion *iommu, return 0; } +static int smmuv3_get_attr(IOMMUMemoryRegion *iommu, + enum IOMMUMemoryRegionAttr attr, + void *data) +{ + if (attr == IOMMU_ATTR_VFIO_NESTED) { + *(bool *) data = true; + return 0; + } + return -EINVAL; +} + static void smmuv3_iommu_memory_region_class_init(ObjectClass *klass, void *data) { @@ -1589,6 +1600,7 @@ static void smmuv3_iommu_memory_region_class_init(ObjectClass *klass, imrc->translate = smmuv3_translate; imrc->notify_flag_changed = smmuv3_notify_flag_changed; + imrc->get_attr = smmuv3_get_attr; } static const TypeInfo smmuv3_type_info = {