From patchwork Wed Apr 26 10:06:37 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: 9700969 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 0F2CF603F4 for ; Wed, 26 Apr 2017 10:24:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DE62F284EE for ; Wed, 26 Apr 2017 10:24:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D1A56285F0; Wed, 26 Apr 2017 10:24:08 +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 486EE284EE for ; Wed, 26 Apr 2017 10:24:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2998074AbdDZKYG (ORCPT ); Wed, 26 Apr 2017 06:24:06 -0400 Received: from mga14.intel.com ([192.55.52.115]:34773 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2998072AbdDZKYE (ORCPT ); Wed, 26 Apr 2017 06:24:04 -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 03:23:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,254,1488873600"; d="scan'208";a="79066360" Received: from sky-dev.bj.intel.com ([10.238.145.47]) by orsmga002.jf.intel.com with ESMTP; 26 Apr 2017 03:23:56 -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 07/20] VFIO: check notifier flag in region_del() Date: Wed, 26 Apr 2017 18:06:37 +0800 Message-Id: <1493201210-14357-8-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 This patch adds flag check when unregistering MAP/UNMAP notifier in region_del. MAP/UNMAP notifier would be unregistered when iommu memory region is deleted. This is to avoid unregistering other notifiers. Peter Xu's intel_iommu enhancement series has introduced dynamic switch of IOMMU region. If an assigned device switches to use "pt", the IOMMU region would be deleted, thus the MAP/UNMAP notifier would be unregistered. While for some cases, the other notifiers may still wanted. e.g. if a user decides to use vSVM for the assigned device after the switch, then the pasid table bind notifier is needed. The newly added pasid table bind notifier would be unregistered in the vfio_disconnect_container(). The link below would direct you to Peter's dynamic switch patch. https://www.mail-archive.com/qemu-devel@nongnu.org/msg444462.html Signed-off-by: Liu, Yi L --- hw/vfio/common.c | 5 +++-- include/exec/memory.h | 2 +- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index e270255..719de61 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -501,7 +501,7 @@ static void vfio_listener_region_add(MemoryListener *listener, section->size); llend = int128_sub(llend, int128_one()); iommu_notifier_init(&n, vfio_iommu_map_notify, - IOMMU_NOTIFIER_ALL, + IOMMU_NOTIFIER_MAP_UNMAP, section->offset_within_region, int128_get64(llend)); @@ -578,7 +578,8 @@ static void vfio_listener_region_del(MemoryListener *listener, QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) { if (giommu->iommu == section->mr && - giommu->n.start == section->offset_within_region) { + giommu->n.start == section->offset_within_region && + giommu->n.notifier_flags & IOMMU_NOTIFIER_MAP_UNMAP) { memory_region_unregister_iommu_notifier(giommu->iommu, &giommu->n); QLIST_REMOVE(giommu, giommu_next); diff --git a/include/exec/memory.h b/include/exec/memory.h index d2f24cc..7bd13ab 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -85,7 +85,7 @@ typedef enum { IOMMU_NOTIFIER_SVM_PASIDT_BIND = 0x4, } IOMMUNotifierFlag; -#define IOMMU_NOTIFIER_ALL (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP) +#define IOMMU_NOTIFIER_MAP_UNMAP (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP) struct IOMMUNotifier; typedef void (*IOMMUNotify)(struct IOMMUNotifier *notifier,