From patchwork Wed Apr 26 10:06:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liu, Yi L" X-Patchwork-Id: 755384 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 3wCbz05YvRz9s2Q for ; Wed, 26 Apr 2017 20:33:48 +1000 (AEST) Received: from localhost ([::1]:54081 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3KGY-0002fq-7o for incoming@patchwork.ozlabs.org; Wed, 26 Apr 2017 06:33:46 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50497) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3K7G-0002kY-Ds for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:24:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3K7F-0002QX-0O for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:24:10 -0400 Received: from mga03.intel.com ([134.134.136.65]:30501) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3K7E-0002MA-M4 for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:24:08 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Apr 2017 03:24:08 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,254,1488873600"; d="scan'208";a="79066392" Received: from sky-dev.bj.intel.com ([10.238.145.47]) by orsmga002.jf.intel.com with ESMTP; 26 Apr 2017 03:24:05 -0700 From: "Liu, Yi L" To: qemu-devel@nongnu.org, alex.williamson@redhat.com, peterx@redhat.com Date: Wed, 26 Apr 2017 18:06:39 +0800 Message-Id: <1493201210-14357-10-git-send-email-yi.l.liu@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1493201210-14357-1-git-send-email-yi.l.liu@linux.intel.com> References: <1493201210-14357-1-git-send-email-yi.l.liu@linux.intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.65 Subject: [Qemu-devel] [RFC PATCH 09/20] Memory: introduce iommu_ops->record_device 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, "Liu, Yi L" , kevin.tian@intel.com, yi.l.liu@intel.com, ashok.raj@intel.com, kvm@vger.kernel.org, jean-philippe.brucker@arm.com, jasowang@redhat.com, iommu@lists.linux-foundation.org, jacob.jun.pan@intel.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" With vIOMMU exposed to guest, vIOMMU emulator needs to do translation between host and guest. e.g. a device-selective TLB flush, vIOMMU emulator needs to replace guest SID with host SID so that to limit the invalidation. This patch introduces a new callback iommu_ops->record_device() to notify vIOMMU emulator to record necessary information about the assigned device. Signed-off-by: Liu, Yi L --- include/exec/memory.h | 11 +++++++++++ memory.c | 12 ++++++++++++ 2 files changed, 23 insertions(+) diff --git a/include/exec/memory.h b/include/exec/memory.h index 7bd13ab..49087ef 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -203,6 +203,8 @@ struct MemoryRegionIOMMUOps { IOMMUNotifierFlag new_flags); /* Set this up to provide customized IOMMU replay function */ void (*replay)(MemoryRegion *iommu, IOMMUNotifier *notifier); + void (*record_device)(MemoryRegion *iommu, + void *device_info); }; typedef struct CoalescedMemoryRange CoalescedMemoryRange; @@ -708,6 +710,15 @@ void memory_region_notify_iommu(MemoryRegion *mr, void memory_region_notify_one(IOMMUNotifier *notifier, IOMMUTLBEntry *entry); +/* + * memory_region_notify_device_record: notify IOMMU to record assign + * device. + * @mr: the memory region to notify + * @ device_info: device information + */ +void memory_region_notify_device_record(MemoryRegion *mr, + void *info); + /** * memory_region_register_iommu_notifier: register a notifier for changes to * IOMMU translation entries. diff --git a/memory.c b/memory.c index 0728e62..45ef069 100644 --- a/memory.c +++ b/memory.c @@ -1600,6 +1600,18 @@ static void memory_region_update_iommu_notify_flags(MemoryRegion *mr) mr->iommu_notify_flags = flags; } +void memory_region_notify_device_record(MemoryRegion *mr, + void *info) +{ + assert(memory_region_is_iommu(mr)); + + if (mr->iommu_ops->record_device) { + mr->iommu_ops->record_device(mr, info); + } + + return; +} + void memory_region_register_iommu_notifier(MemoryRegion *mr, IOMMUNotifier *n) {