From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33125) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Usc0U-0003dm-Cz for qemu-devel@nongnu.org; Fri, 28 Jun 2013 12:58:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Usc0T-0001jS-9j for qemu-devel@nongnu.org; Fri, 28 Jun 2013 12:58:46 -0400 Received: from mail-ea0-x234.google.com ([2a00:1450:4013:c01::234]:38461) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Usc0T-0001jL-2R for qemu-devel@nongnu.org; Fri, 28 Jun 2013 12:58:45 -0400 Received: by mail-ea0-f180.google.com with SMTP id k10so1168316eaj.25 for ; Fri, 28 Jun 2013 09:58:44 -0700 (PDT) Sender: Paolo Bonzini From: Paolo Bonzini Date: Fri, 28 Jun 2013 18:58:15 +0200 Message-Id: <1372438702-20491-5-git-send-email-pbonzini@redhat.com> In-Reply-To: <1372438702-20491-1-git-send-email-pbonzini@redhat.com> References: <1372438702-20491-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PATCH v2 04/11] memory: add getter for owner List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: jan.kiszka@siemens.com, peter.maydell@linaro.org Whenever memory regions are accessed outside the BQL, they need to be preserved against hot-unplug. MemoryRegions actually do not have their own reference count; they piggyback on a QOM object, their "owner". The owner is set at creation time, and there is a function to retrieve the owner. Signed-off-by: Paolo Bonzini --- include/exec/memory.h | 7 +++++++ memory.c | 6 ++++++ 2 files changed, 13 insertions(+) diff --git a/include/exec/memory.h b/include/exec/memory.h index be3d39f..1ad9c19 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -380,6 +380,13 @@ void memory_region_init_iommu(MemoryRegion *mr, void memory_region_destroy(MemoryRegion *mr); /** + * memory_region_owner: get a memory region's owner. + * + * @mr: the memory region being queried. + */ +struct Object *memory_region_owner(MemoryRegion *mr); + +/** * memory_region_size: get a memory region's size. * * @mr: the memory region being queried. diff --git a/memory.c b/memory.c index 6250bec1..4d396c3 100644 --- a/memory.c +++ b/memory.c @@ -738,6 +738,7 @@ void memory_region_init(MemoryRegion *mr, mr->owner = owner; mr->iommu_ops = NULL; mr->parent = NULL; + mr->owner = NULL; mr->size = int128_make64(size); if (size == UINT64_MAX) { mr->size = int128_2_64(); @@ -1011,6 +1012,11 @@ void memory_region_destroy(MemoryRegion *mr) g_free(mr->ioeventfds); } +Object *memory_region_owner(MemoryRegion *mr) +{ + return mr->owner; +} + uint64_t memory_region_size(MemoryRegion *mr) { if (int128_eq(mr->size, int128_2_64())) { -- 1.8.1.4