From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:32903) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UrRC3-0006uR-Kk for qemu-devel@nongnu.org; Tue, 25 Jun 2013 07:13:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UrRC2-0000Cy-Cd for qemu-devel@nongnu.org; Tue, 25 Jun 2013 07:13:51 -0400 Received: from mail-ea0-x22b.google.com ([2a00:1450:4013:c01::22b]:39044) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UrRC2-0000Cd-7O for qemu-devel@nongnu.org; Tue, 25 Jun 2013 07:13:50 -0400 Received: by mail-ea0-f171.google.com with SMTP id m14so6681590eaj.16 for ; Tue, 25 Jun 2013 04:13:49 -0700 (PDT) Sender: Paolo Bonzini From: Paolo Bonzini Date: Tue, 25 Jun 2013 13:13:20 +0200 Message-Id: <1372158807-19715-5-git-send-email-pbonzini@redhat.com> In-Reply-To: <1372158807-19715-1-git-send-email-pbonzini@redhat.com> References: <1372158807-19715-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PATCH 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: 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 d0865c8..763297e 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -405,6 +405,13 @@ 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 521deb0..61b3f25 100644 --- a/memory.c +++ b/memory.c @@ -826,6 +826,7 @@ 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(); @@ -1099,6 +1100,11 @@ 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