From patchwork Fri Jan 20 13:08:49 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Xu X-Patchwork-Id: 717654 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3v4hHH0SsXz9ryr for ; Sat, 21 Jan 2017 00:23:39 +1100 (AEDT) Received: from localhost ([::1]:54706 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cUZAG-0004oM-JY for incoming@patchwork.ozlabs.org; Fri, 20 Jan 2017 08:23:36 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48822) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cUYwu-0001p5-LW for qemu-devel@nongnu.org; Fri, 20 Jan 2017 08:09:51 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cUYwo-0002Zx-M7 for qemu-devel@nongnu.org; Fri, 20 Jan 2017 08:09:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:58256) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cUYwo-0002Yr-EA for qemu-devel@nongnu.org; Fri, 20 Jan 2017 08:09:42 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 979E181247; Fri, 20 Jan 2017 13:09:42 +0000 (UTC) Received: from pxdev.xzpeter.org.com (dhcp-14-110.nay.redhat.com [10.66.14.110]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v0KD8xZv031397; Fri, 20 Jan 2017 08:09:39 -0500 From: Peter Xu To: qemu-devel@nongnu.org Date: Fri, 20 Jan 2017 21:08:49 +0800 Message-Id: <1484917736-32056-14-git-send-email-peterx@redhat.com> In-Reply-To: <1484917736-32056-1-git-send-email-peterx@redhat.com> References: <1484917736-32056-1-git-send-email-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Fri, 20 Jan 2017 13:09:42 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH RFC v4 13/20] memory: introduce memory_region_notify_one() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tianyu.lan@intel.com, kevin.tian@intel.com, mst@redhat.com, jan.kiszka@siemens.com, jasowang@redhat.com, peterx@redhat.com, alex.williamson@redhat.com, bd.aviv@gmail.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Generalizing the notify logic in memory_region_notify_iommu() into a single function. This can be further used in customized replay() functions for IOMMUs. Signed-off-by: Peter Xu --- include/exec/memory.h | 15 +++++++++++++++ memory.c | 29 ++++++++++++++++++----------- 2 files changed, 33 insertions(+), 11 deletions(-) diff --git a/include/exec/memory.h b/include/exec/memory.h index 885c05f..75371e9 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -686,6 +686,21 @@ void memory_region_notify_iommu(MemoryRegion *mr, IOMMUTLBEntry entry); /** + * memory_region_notify_one: notify a change in an IOMMU translation + * entry to a single notifier + * + * This works just like memory_region_notify_iommu(), but it only + * notifies a specific notifier, not all of them. + * + * @notifier: the notifier to be notified + * @entry: the new entry in the IOMMU translation table. The entry + * replaces all old entries for the same virtual I/O address range. + * Deleted entries have .@perm == 0. + */ +void memory_region_notify_one(IOMMUNotifier *notifier, + IOMMUTLBEntry *entry); + +/** * memory_region_register_iommu_notifier: register a notifier for changes to * IOMMU translation entries. * diff --git a/memory.c b/memory.c index 068666a..a4affda 100644 --- a/memory.c +++ b/memory.c @@ -1666,26 +1666,33 @@ void memory_region_unregister_iommu_notifier(MemoryRegion *mr, memory_region_update_iommu_notify_flags(mr); } -void memory_region_notify_iommu(MemoryRegion *mr, - IOMMUTLBEntry entry) +void memory_region_notify_one(IOMMUNotifier *notifier, + IOMMUTLBEntry *entry) { - IOMMUNotifier *iommu_notifier; IOMMUNotifierFlag request_flags; - assert(memory_region_is_iommu(mr)); - - if (entry.perm & IOMMU_RW) { + if (entry->perm & IOMMU_RW) { request_flags = IOMMU_NOTIFIER_MAP; } else { request_flags = IOMMU_NOTIFIER_UNMAP; } + if (notifier->notifier_flags & request_flags && + notifier->start <= entry->iova && + notifier->end >= entry->iova) { + notifier->notify(notifier, entry); + } +} + +void memory_region_notify_iommu(MemoryRegion *mr, + IOMMUTLBEntry entry) +{ + IOMMUNotifier *iommu_notifier; + + assert(memory_region_is_iommu(mr)); + IOMMU_NOTIFIER_FOREACH(iommu_notifier, mr) { - if (iommu_notifier->notifier_flags & request_flags && - iommu_notifier->start <= entry.iova && - iommu_notifier->end >= entry.iova) { - iommu_notifier->notify(iommu_notifier, &entry); - } + memory_region_notify_one(iommu_notifier, &entry); } }