From nobody Tue May 13 07:25:22 2025 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1646693716204151.90462211713282; Mon, 7 Mar 2022 14:55:16 -0800 (PST) Received: from localhost ([::1]:48254 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nRMG3-0000aY-7l for importer2@patchew.org; Mon, 07 Mar 2022 17:55:15 -0500 Received: from eggs.gnu.org ([209.51.188.92]:52856) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nRM6l-00079F-2g for qemu-devel@nongnu.org; Mon, 07 Mar 2022 17:45:39 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:44676) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nRM6j-0005YV-9M for qemu-devel@nongnu.org; Mon, 07 Mar 2022 17:45:38 -0500 Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-235-l1HbBBJnOg6Yju-nFZEx0w-1; Mon, 07 Mar 2022 17:45:35 -0500 Received: by mail-wm1-f72.google.com with SMTP id c19-20020a05600c0ad300b00385bb3db625so257254wmr.4 for ; Mon, 07 Mar 2022 14:45:35 -0800 (PST) Received: from redhat.com ([2.55.138.228]) by smtp.gmail.com with ESMTPSA id r188-20020a1c2bc5000000b00387c81c32e7sm555903wmr.8.2022.03.07.14.45.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Mar 2022 14:45:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646693136; 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: in-reply-to:in-reply-to:references:references; bh=JMuvtu5n6lVU0KTov6tttqgUMeVGZs5d6LsC2M1zLP4=; b=WxpzfPzQjEbz9apgDruyOL9GWCDmpZdL7H9PaafI3fQ48Qh/s7HHGzGx4O64+6XJPGM40x R32bd3zWBOkg1E91dodPZQ0H/nQxpybi1i8nwHBkuYVEc7nfyGmUfl3D61J/ljrZ1ekoNY Ih5wqKFKLBL9Q/2PHKxsgG86it65nYE= X-MC-Unique: l1HbBBJnOg6Yju-nFZEx0w-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=JMuvtu5n6lVU0KTov6tttqgUMeVGZs5d6LsC2M1zLP4=; b=h/l2NiIIsykCM9BKDDo10gp0pyGQeVB/GRD71RbCSRaVjQWtuSeJfSnwaoGzX9QFUf qSyefeLUunxpZmD1zEWLVAa9wRXSgUNMdpot1g4NRekFYpHyrwWgbITOkwhPj5Y9tT2i 7ujn9WvZ2fpdVxR1r2hHH9l3SwagvDLXbI//0QZfzezxuhWb90MICjtsr598ira5mpfL BvdkrD8rpDmzJuKPt/8Vz4v1xp3nOpvrMwHgqtW+dOdz4QzM4vWHXfzZCDnzUAEZVDsu qv6c+pYqRv5LMlZo+utPiSr42s1mYCYoBYZV/bdJobRI1PR4xVPWEnA5khSAB6sQrKLc DQYw== X-Gm-Message-State: AOAM533HYfkxqre7Zcyg4/+RtnlmrjljwcAd7UJ7tnoK/E20drykpYN2 lMsz6UWe8hYnl1mmYkCfDn9BuP6tI3JCFfo93IRH64re2FOGKdbrW4YiKNllCcdlaEm6D6bwJ40 Wf9BD0CC2quwz7ra/6aL7eGakSGfWc5crsboAJtMiiKbfw4zVa4cjgjB+boyJ X-Received: by 2002:a05:6000:1549:b0:1f1:e566:eb87 with SMTP id 9-20020a056000154900b001f1e566eb87mr8224936wry.87.1646693134260; Mon, 07 Mar 2022 14:45:34 -0800 (PST) X-Google-Smtp-Source: ABdhPJxXvYljVKBc0F3vp2xlIQ9BYr3eTpyI/pwSXE60ZQ92xuCg6DF2/2bThMgByiEph+8EnLmd4g== X-Received: by 2002:a05:6000:1549:b0:1f1:e566:eb87 with SMTP id 9-20020a056000154900b001f1e566eb87mr8224922wry.87.1646693133943; Mon, 07 Mar 2022 14:45:33 -0800 (PST) Date: Mon, 7 Mar 2022 17:45:31 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Subject: [PULL v4 19/47] virtio-iommu: Support bypass domain Message-ID: <20220307224357.682101-20-mst@redhat.com> References: <20220307224357.682101-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20220307224357.682101-1-mst@redhat.com> X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Cornelia Huck , Eric Auger , Jean-Philippe Brucker Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1646693717660100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Jean-Philippe Brucker The driver can create a bypass domain by passing the VIRTIO_IOMMU_ATTACH_F_BYPASS flag on the ATTACH request. Bypass domains perform slightly better than domains with identity mappings since they skip translation. Signed-off-by: Jean-Philippe Brucker Message-Id: <20220214124356.872985-4-jean-philippe@linaro.org> Acked-by: Cornelia Huck Reviewed-by: Eric Auger Tested-by: Eric Auger Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/virtio-iommu.c | 39 ++++++++++++++++++++++++++++++++++----- 1 file changed, 34 insertions(+), 5 deletions(-) diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 4ca36db4ac..239fe97b12 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -43,6 +43,7 @@ =20 typedef struct VirtIOIOMMUDomain { uint32_t id; + bool bypass; GTree *mappings; QLIST_HEAD(, VirtIOIOMMUEndpoint) endpoint_list; } VirtIOIOMMUDomain; @@ -258,12 +259,16 @@ static void virtio_iommu_put_endpoint(gpointer data) } =20 static VirtIOIOMMUDomain *virtio_iommu_get_domain(VirtIOIOMMU *s, - uint32_t domain_id) + uint32_t domain_id, + bool bypass) { VirtIOIOMMUDomain *domain; =20 domain =3D g_tree_lookup(s->domains, GUINT_TO_POINTER(domain_id)); if (domain) { + if (domain->bypass !=3D bypass) { + return NULL; + } return domain; } domain =3D g_malloc0(sizeof(*domain)); @@ -271,6 +276,7 @@ static VirtIOIOMMUDomain *virtio_iommu_get_domain(VirtI= OIOMMU *s, domain->mappings =3D g_tree_new_full((GCompareDataFunc)interval_cmp, NULL, (GDestroyNotify)g_free, (GDestroyNotify)g_free); + domain->bypass =3D bypass; g_tree_insert(s->domains, GUINT_TO_POINTER(domain_id), domain); QLIST_INIT(&domain->endpoint_list); trace_virtio_iommu_get_domain(domain_id); @@ -334,11 +340,16 @@ static int virtio_iommu_attach(VirtIOIOMMU *s, { uint32_t domain_id =3D le32_to_cpu(req->domain); uint32_t ep_id =3D le32_to_cpu(req->endpoint); + uint32_t flags =3D le32_to_cpu(req->flags); VirtIOIOMMUDomain *domain; VirtIOIOMMUEndpoint *ep; =20 trace_virtio_iommu_attach(domain_id, ep_id); =20 + if (flags & ~VIRTIO_IOMMU_ATTACH_F_BYPASS) { + return VIRTIO_IOMMU_S_INVAL; + } + ep =3D virtio_iommu_get_endpoint(s, ep_id); if (!ep) { return VIRTIO_IOMMU_S_NOENT; @@ -356,7 +367,12 @@ static int virtio_iommu_attach(VirtIOIOMMU *s, } } =20 - domain =3D virtio_iommu_get_domain(s, domain_id); + domain =3D virtio_iommu_get_domain(s, domain_id, + flags & VIRTIO_IOMMU_ATTACH_F_BYPASS); + if (!domain) { + /* Incompatible bypass flag */ + return VIRTIO_IOMMU_S_INVAL; + } QLIST_INSERT_HEAD(&domain->endpoint_list, ep, next); =20 ep->domain =3D domain; @@ -419,6 +435,10 @@ static int virtio_iommu_map(VirtIOIOMMU *s, return VIRTIO_IOMMU_S_NOENT; } =20 + if (domain->bypass) { + return VIRTIO_IOMMU_S_INVAL; + } + interval =3D g_malloc0(sizeof(*interval)); =20 interval->low =3D virt_start; @@ -464,6 +484,11 @@ static int virtio_iommu_unmap(VirtIOIOMMU *s, if (!domain) { return VIRTIO_IOMMU_S_NOENT; } + + if (domain->bypass) { + return VIRTIO_IOMMU_S_INVAL; + } + interval.low =3D virt_start; interval.high =3D virt_end; =20 @@ -780,6 +805,9 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemory= Region *mr, hwaddr addr, entry.perm =3D flag; } goto unlock; + } else if (ep->domain->bypass) { + entry.perm =3D flag; + goto unlock; } =20 found =3D g_tree_lookup_extended(ep->domain->mappings, (gpointer)(&int= erval), @@ -1139,8 +1167,8 @@ static const VMStateDescription vmstate_endpoint =3D { =20 static const VMStateDescription vmstate_domain =3D { .name =3D "domain", - .version_id =3D 1, - .minimum_version_id =3D 1, + .version_id =3D 2, + .minimum_version_id =3D 2, .pre_load =3D domain_preload, .fields =3D (VMStateField[]) { VMSTATE_UINT32(id, VirtIOIOMMUDomain), @@ -1149,6 +1177,7 @@ static const VMStateDescription vmstate_domain =3D { VirtIOIOMMUInterval, VirtIOIOMMUMapping), VMSTATE_QLIST_V(endpoint_list, VirtIOIOMMUDomain, 1, vmstate_endpoint, VirtIOIOMMUEndpoint, next), + VMSTATE_BOOL_V(bypass, VirtIOIOMMUDomain, 2), VMSTATE_END_OF_LIST() } }; @@ -1186,7 +1215,7 @@ static const VMStateDescription vmstate_virtio_iommu_= device =3D { .version_id =3D 2, .post_load =3D iommu_post_load, .fields =3D (VMStateField[]) { - VMSTATE_GTREE_DIRECT_KEY_V(domains, VirtIOIOMMU, 1, + VMSTATE_GTREE_DIRECT_KEY_V(domains, VirtIOIOMMU, 2, &vmstate_domain, VirtIOIOMMUDomain), VMSTATE_UINT8_V(config.bypass, VirtIOIOMMU, 2), VMSTATE_END_OF_LIST() --=20 MST