From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50664) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1arASj-00018s-OO for qemu-devel@nongnu.org; Fri, 15 Apr 2016 16:35:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1arASe-00013j-Kk for qemu-devel@nongnu.org; Fri, 15 Apr 2016 16:35:33 -0400 Received: from e19.ny.us.ibm.com ([129.33.205.209]:36639) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1arASe-00013X-GX for qemu-devel@nongnu.org; Fri, 15 Apr 2016 16:35:28 -0400 Received: from localhost by e19.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 15 Apr 2016 16:35:28 -0400 From: Jianjun Duan Date: Fri, 15 Apr 2016 13:33:03 -0700 Message-Id: <1460752385-13259-4-git-send-email-duanj@linux.vnet.ibm.com> In-Reply-To: <1460752385-13259-1-git-send-email-duanj@linux.vnet.ibm.com> References: <1460752385-13259-1-git-send-email-duanj@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 3/5] vmstate: Define VARRAY with VMS_ALLOC List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, mdroth@linux.vnet.ibm.com, david@gibson.dropbear.id.au, Alexey Kardashevskiy , Jianjun Duan From: Alexey Kardashevskiy This allows dynamic allocation for migrating arrays. Already existing VMSTATE_VARRAY_UINT32 requires an array to be pre-allocated, however there are cases when the size is not known in advance and there is no real need to enforce it. This defines another variant of VMSTATE_VARRAY_UINT32 with WMS_ALLOC flag which tells the receiving side to allocate memory for the array before receiving the data. The first user of it is a dynamic DMA window which existence and size are totally dynamic. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson Reviewed-by: Thomas Huth Signed-off-by: Jianjun Duan --- include/migration/vmstate.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 84ee355..1622638 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -386,6 +386,16 @@ extern const VMStateInfo vmstate_info_bitmap; .offset = vmstate_offset_pointer(_state, _field, _type), \ } +#define VMSTATE_VARRAY_UINT32_ALLOC(_field, _state, _field_num, _version, _info, _type) {\ + .name = (stringify(_field)), \ + .version_id = (_version), \ + .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\ + .info = &(_info), \ + .size = sizeof(_type), \ + .flags = VMS_VARRAY_UINT32|VMS_POINTER|VMS_ALLOC, \ + .offset = vmstate_offset_pointer(_state, _field, _type), \ +} + #define VMSTATE_VARRAY_UINT16_UNSAFE(_field, _state, _field_num, _version, _info, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ -- 1.9.1