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: 9700973 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BCB1B603F4 for ; Wed, 26 Apr 2017 10:24:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 99858284EE for ; Wed, 26 Apr 2017 10:24:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8DAFD285F3; Wed, 26 Apr 2017 10:24:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4175A284EE for ; Wed, 26 Apr 2017 10:24:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2998080AbdDZKYO (ORCPT ); Wed, 26 Apr 2017 06:24:14 -0400 Received: from mga14.intel.com ([192.55.52.115]:8890 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2998068AbdDZKYM (ORCPT ); Wed, 26 Apr 2017 06:24:12 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga103.fm.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 Cc: kvm@vger.kernel.org, jasowang@redhat.com, iommu@lists.linux-foundation.org, kevin.tian@intel.com, ashok.raj@intel.com, jacob.jun.pan@intel.com, tianyu.lan@intel.com, yi.l.liu@intel.com, jean-philippe.brucker@arm.com, "Liu, Yi L" Subject: [RFC PATCH 09/20] Memory: introduce iommu_ops->record_device 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> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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) {