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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 AF477C71142 for ; Thu, 11 Jul 2019 17:45:57 +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 8C82B208E4 for ; Thu, 11 Jul 2019 17:45:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8C82B208E4 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]:44362 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hld8m-00070Y-BQ for qemu-devel@archiver.kernel.org; Thu, 11 Jul 2019 13:45:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38634) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hld4b-0006Gd-W9 for qemu-devel@nongnu.org; Thu, 11 Jul 2019 13:41:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hld4a-0005Cp-JW for qemu-devel@nongnu.org; Thu, 11 Jul 2019 13:41:37 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38588) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hld4W-00054R-5h; Thu, 11 Jul 2019 13:41:33 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 83E0A81F19; Thu, 11 Jul 2019 17:41:30 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-46.ams2.redhat.com [10.36.116.46]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8F5F46092E; Thu, 11 Jul 2019 17:41:27 +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 Date: Thu, 11 Jul 2019 19:39:19 +0200 Message-Id: <20190711173933.31203-16-eric.auger@redhat.com> In-Reply-To: <20190711173933.31203-1-eric.auger@redhat.com> References: <20190711173933.31203-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 11 Jul 2019 17:41:30 +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] [RFC v5 15/29] vfio: Introduce hostwin_from_range helper 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: drjones@redhat.com, yi.l.liu@intel.com, mst@redhat.com, jean-philippe.brucker@arm.com, zhangfei.gao@foxmail.com, peterx@redhat.com, alex.williamson@redhat.com, vincent.stehle@arm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Let's introduce a hostwin_from_range() helper that returns the hostwin encapsulating an IOVA range or NULL if non is found. This improves the readibility of callers and removes the usage of hostwin_found. Signed-off-by: Eric Auger --- hw/vfio/common.c | 36 +++++++++++++++++------------------- 1 file changed, 17 insertions(+), 19 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 46a1a089a4..81d29ce908 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -497,6 +497,19 @@ out: rcu_read_unlock(); } =20 +static VFIOHostDMAWindow * +hostwin_from_range(VFIOContainer *container, hwaddr iova, hwaddr end) +{ + VFIOHostDMAWindow *hostwin; + + QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { + if (hostwin->min_iova <=3D iova && end <=3D hostwin->max_iova) { + return hostwin; + } + } + return NULL; +} + static void vfio_listener_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -506,7 +519,6 @@ static void vfio_listener_region_add(MemoryListener *= listener, void *vaddr; int ret; VFIOHostDMAWindow *hostwin; - bool hostwin_found; =20 if (vfio_listener_skipped_section(section)) { trace_vfio_listener_region_add_skip( @@ -583,15 +595,8 @@ static void vfio_listener_region_add(MemoryListener = *listener, #endif } =20 - hostwin_found =3D false; - QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { - if (hostwin->min_iova <=3D iova && end <=3D hostwin->max_iova) { - hostwin_found =3D true; - break; - } - } - - if (!hostwin_found) { + hostwin =3D hostwin_from_range(container, iova, end); + if (!hostwin) { error_report("vfio: IOMMU container %p can't map guest IOVA regi= on" " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx, container, iova, end); @@ -763,16 +768,9 @@ static void vfio_listener_region_del(MemoryListener = *listener, =20 if (memory_region_is_ram_device(section->mr)) { hwaddr pgmask; - VFIOHostDMAWindow *hostwin; - bool hostwin_found =3D false; + VFIOHostDMAWindow *hostwin =3D hostwin_from_range(container, iov= a, end); =20 - QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { - if (hostwin->min_iova <=3D iova && end <=3D hostwin->max_iov= a) { - hostwin_found =3D true; - break; - } - } - assert(hostwin_found); /* or region_add() would have failed */ + assert(hostwin); /* or region_add() would have failed */ =20 pgmask =3D (1ULL << ctz64(hostwin->iova_pgsizes)) - 1; try_unmap =3D !((iova & pgmask) || (int128_get64(llsize) & pgmas= k)); --=20 2.20.1