From patchwork Fri Apr 15 20:33:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianjun Duan X-Patchwork-Id: 8858331 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 61D509F1D3 for ; Fri, 15 Apr 2016 20:37:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BC96D202A1 for ; Fri, 15 Apr 2016 20:37:54 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9F3A420295 for ; Fri, 15 Apr 2016 20:37:53 +0000 (UTC) Received: from localhost ([::1]:41713 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1arAUy-00079U-Vf for patchwork-qemu-devel@patchwork.kernel.org; Fri, 15 Apr 2016 16:37:53 -0400 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! 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Violators will be prosecuted; Fri, 15 Apr 2016 16:35:25 -0400 X-IBM-Helo: d01dlp02.pok.ibm.com X-IBM-MailFrom: duanj@linux.vnet.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org;qemu-ppc@nongnu.org Received: from b01cxnp22036.gho.pok.ibm.com (b01cxnp22036.gho.pok.ibm.com [9.57.198.26]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id 40C696E804B; Fri, 15 Apr 2016 16:22:13 -0400 (EDT) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by b01cxnp22036.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u3FKZOAf41353442; Fri, 15 Apr 2016 20:35:24 GMT Received: from d01av04.pok.ibm.com (localhost [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u3FKZN1a008397; Fri, 15 Apr 2016 16:35:24 -0400 Received: from jianjun-w530.ibm.com (sig-9-77-140-203.ibm.com [9.77.140.203]) by d01av04.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u3FKZDg0007830; Fri, 15 Apr 2016 16:35:22 -0400 From: Jianjun Duan To: qemu-devel@nongnu.org Date: Fri, 15 Apr 2016 13:33:03 -0700 Message-Id: <1460752385-13259-4-git-send-email-duanj@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.1 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> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16041520-0057-0000-0000-0000040C9D7B X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 129.33.205.209 Subject: [Qemu-devel] [PATCH 3/5] vmstate: Define VARRAY with VMS_ALLOC X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexey Kardashevskiy , Jianjun Duan , qemu-ppc@nongnu.org, mdroth@linux.vnet.ibm.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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), \