From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36600) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c9tW2-0001KX-SO for qemu-devel@nongnu.org; Thu, 24 Nov 2016 07:52:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c9tVz-0003xC-R4 for qemu-devel@nongnu.org; Thu, 24 Nov 2016 07:52:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46414) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1c9tVz-0003wE-Ii for qemu-devel@nongnu.org; Thu, 24 Nov 2016 07:52:35 -0500 From: Peter Xu Date: Thu, 24 Nov 2016 20:52:29 +0800 Message-Id: <1479991949-11311-1-git-send-email-peterx@redhat.com> Subject: [Qemu-devel] [PATCH v2] memory: add section range info for IOMMU notifier List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, alex.williamson@redhat.com, peterx@redhat.com, david@gibson.dropbear.id.au In this patch, IOMMUNotifier.{start|end} are introduced to store section information for a specific notifier. When notification occurs, we not only check the notification type (MAP|UNMAP), but also check whether the notified iova is in the range of specific IOMMU notifier, and skip those notifiers if not in the listened range. When removing an region, we need to make sure we removed the correct VFIOGuestIOMMU by checking the IOMMUNotifier.start address as well. Suggested-by: David Gibson Signed-off-by: Peter Xu --- v2: - replace offset_within_address_space with offset_within_region since IOTLB iova is relative to region [David] --- hw/vfio/common.c | 7 ++++++- include/exec/memory.h | 3 +++ memory.c | 4 +++- 3 files changed, 12 insertions(+), 2 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 801578b..6f648da 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -455,6 +455,10 @@ static void vfio_listener_region_add(MemoryListener *listener, giommu->container = container; giommu->n.notify = vfio_iommu_map_notify; giommu->n.notifier_flags = IOMMU_NOTIFIER_ALL; + giommu->n.start = section->offset_within_region; + llend = int128_add(int128_make64(giommu->n.start), section->size); + llend = int128_sub(llend, int128_one()); + giommu->n.end = int128_get64(llend); QLIST_INSERT_HEAD(&container->giommu_list, giommu, giommu_next); memory_region_register_iommu_notifier(giommu->iommu, &giommu->n); @@ -525,7 +529,8 @@ static void vfio_listener_region_del(MemoryListener *listener, VFIOGuestIOMMU *giommu; QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) { - if (giommu->iommu == section->mr) { + if (giommu->iommu == section->mr && + giommu->n.start == section->offset_within_region) { 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 9728a2f..87357ea 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -84,6 +84,9 @@ typedef enum { struct IOMMUNotifier { void (*notify)(struct IOMMUNotifier *notifier, IOMMUTLBEntry *data); IOMMUNotifierFlag notifier_flags; + /* Notify for address space range start <= addr <= end */ + hwaddr start; + hwaddr end; QLIST_ENTRY(IOMMUNotifier) node; }; typedef struct IOMMUNotifier IOMMUNotifier; diff --git a/memory.c b/memory.c index 33110e9..f89d047 100644 --- a/memory.c +++ b/memory.c @@ -1662,7 +1662,9 @@ void memory_region_notify_iommu(MemoryRegion *mr, } QLIST_FOREACH(iommu_notifier, &mr->iommu_notify, node) { - if (iommu_notifier->notifier_flags & request_flags) { + if (iommu_notifier->notifier_flags & request_flags && + iommu_notifier->start <= entry.iova && + iommu_notifier->end >= entry.iova) { iommu_notifier->notify(iommu_notifier, &entry); } } -- 2.7.4