From nobody Wed Apr 16 03:26:11 2025 Delivered-To: importer@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+importer=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 164688077006611.495986313346634; Wed, 9 Mar 2022 18:52:50 -0800 (PST) Received: from localhost ([::1]:35308 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nS8v2-0001Yy-Dv for importer@patchew.org; Wed, 09 Mar 2022 21:52:48 -0500 Received: from eggs.gnu.org ([209.51.188.92]:38852) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nS8jG-0005Ig-92 for qemu-devel@nongnu.org; Wed, 09 Mar 2022 21:40:38 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:60915) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nS8jE-0004My-KK for qemu-devel@nongnu.org; Wed, 09 Mar 2022 21:40:38 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-668-Vvrz7LH9MAqKi1mJadfs9A-1; Wed, 09 Mar 2022 21:40:31 -0500 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 B79FF1091DA0; Thu, 10 Mar 2022 02:40:30 +0000 (UTC) Received: from localhost.localdomain (ovpn-13-194.pek2.redhat.com [10.72.13.194]) by smtp.corp.redhat.com (Postfix) with ESMTP id D907F100685F; Thu, 10 Mar 2022 02:40:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646880035; 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=41hG9ZNBHL2IRjy9QbhclScPSrR8Yz4FdHub434stmo=; b=OEmnUIPY93nFoB8DBaNQuWfvQ4fS6i5EREsu+mWA0Pi1/2E+2MW0Mqd1tWEq53nPHcw6pt izRVooihLBHd6Cp0Roeugz2P/y09Dead3qzibVYKS5DdXJOiN0UzMw7D8Wwz4sh4lTjJes Zwyquij6DbIPC1SoTkPK8RQlkj6H+Xw= X-MC-Unique: Vvrz7LH9MAqKi1mJadfs9A-1 From: Jason Wang To: qemu-devel@nongnu.org, peter.maydell@linaro.org Subject: [PULL V2 10/15] util: add iova_tree_find_iova Date: Thu, 10 Mar 2022 10:39:02 +0800 Message-Id: <20220310023907.2443-11-jasowang@redhat.com> In-Reply-To: <20220310023907.2443-1-jasowang@redhat.com> References: <20220310023907.2443-1-jasowang@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=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=jasowang@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: =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Jason Wang , "Michael S . Tsirkin" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1646880770745100001 From: Eugenio P=C3=A9rez This function does the reverse operation of iova_tree_find: To look for a mapping that match a translated address so we can do the reverse. This have linear complexity instead of logarithmic, but it supports overlapping HVA. Future developments could reduce it. Acked-by: Michael S. Tsirkin Signed-off-by: Eugenio P=C3=A9rez Signed-off-by: Jason Wang --- include/qemu/iova-tree.h | 20 +++++++++++++++++++- util/iova-tree.c | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+), 1 deletion(-) diff --git a/include/qemu/iova-tree.h b/include/qemu/iova-tree.h index d066400..c938fb0 100644 --- a/include/qemu/iova-tree.h +++ b/include/qemu/iova-tree.h @@ -83,7 +83,7 @@ int iova_tree_remove(IOVATree *tree, const DMAMap *map); * @tree: the iova tree to search from * @map: the mapping to search * - * Search for a mapping in the iova tree that overlaps with the + * Search for a mapping in the iova tree that iova overlaps with the * mapping range specified. Only the first found mapping will be * returned. * @@ -96,6 +96,24 @@ int iova_tree_remove(IOVATree *tree, const DMAMap *map); const DMAMap *iova_tree_find(const IOVATree *tree, const DMAMap *map); =20 /** + * iova_tree_find_iova: + * + * @tree: the iova tree to search from + * @map: the mapping to search + * + * Search for a mapping in the iova tree that translated_addr overlaps wit= h the + * mapping range specified. Only the first found mapping will be + * returned. + * + * Return: DMAMap pointer if found, or NULL if not found. Note that + * the returned DMAMap pointer is maintained internally. User should + * only read the content but never modify or free the content. Also, + * user is responsible to make sure the pointer is valid (say, no + * concurrent deletion in progress). + */ +const DMAMap *iova_tree_find_iova(const IOVATree *tree, const DMAMap *map); + +/** * iova_tree_find_address: * * @tree: the iova tree to search from diff --git a/util/iova-tree.c b/util/iova-tree.c index 3160c50..f015598 100644 --- a/util/iova-tree.c +++ b/util/iova-tree.c @@ -37,6 +37,11 @@ struct IOVATreeAllocArgs { bool iova_found; }; =20 +typedef struct IOVATreeFindIOVAArgs { + const DMAMap *needle; + const DMAMap *result; +} IOVATreeFindIOVAArgs; + /** * Iterate args to the next hole * @@ -80,6 +85,35 @@ const DMAMap *iova_tree_find(const IOVATree *tree, const= DMAMap *map) return g_tree_lookup(tree->tree, map); } =20 +static gboolean iova_tree_find_address_iterator(gpointer key, gpointer val= ue, + gpointer data) +{ + const DMAMap *map =3D key; + IOVATreeFindIOVAArgs *args =3D data; + const DMAMap *needle; + + g_assert(key =3D=3D value); + + needle =3D args->needle; + if (map->translated_addr + map->size < needle->translated_addr || + needle->translated_addr + needle->size < map->translated_addr) { + return false; + } + + args->result =3D map; + return true; +} + +const DMAMap *iova_tree_find_iova(const IOVATree *tree, const DMAMap *map) +{ + IOVATreeFindIOVAArgs args =3D { + .needle =3D map, + }; + + g_tree_foreach(tree->tree, iova_tree_find_address_iterator, &args); + return args.result; +} + const DMAMap *iova_tree_find_address(const IOVATree *tree, hwaddr iova) { const DMAMap map =3D { .iova =3D iova, .size =3D 0 }; --=20 2.7.4