From patchwork Tue May 24 17:55:06 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianjun Duan X-Patchwork-Id: 9133991 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4B9E3607D8 for ; Tue, 24 May 2016 17:55:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 40A40280BB for ; Tue, 24 May 2016 17:55:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 358B828258; Tue, 24 May 2016 17:55:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 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.wl.linuxfoundation.org (Postfix) with ESMTPS id 2B986281E3 for ; Tue, 24 May 2016 17:55:55 +0000 (UTC) Received: from localhost ([::1]:54684 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5GYb-0005qh-Eb for patchwork-qemu-devel@patchwork.kernel.org; Tue, 24 May 2016 13:55:53 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53796) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5GY7-0005qL-DD for qemu-devel@nongnu.org; Tue, 24 May 2016 13:55:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b5GY6-00013k-AW for qemu-devel@nongnu.org; Tue, 24 May 2016 13:55:23 -0400 Received: from e18.ny.us.ibm.com ([129.33.205.208]:55322) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5GY6-00013R-5W for qemu-devel@nongnu.org; Tue, 24 May 2016 13:55:22 -0400 Received: from localhost by e18.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 24 May 2016 13:55:19 -0400 X-IBM-Helo: d01dlp02.pok.ibm.com X-IBM-MailFrom: duanj@linux.vnet.ibm.com X-IBM-RcptTo: david@gibson.dropbear.id.au; qemu-devel@nongnu.org; qemu-ppc@nongnu.org; amit.shah@redhat.com; quintela@redhat.com Received: from b01cxnp23034.gho.pok.ibm.com (b01cxnp23034.gho.pok.ibm.com [9.57.198.29]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id 54D2C6E8047; Tue, 24 May 2016 13:55:02 -0400 (EDT) Received: from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com [9.57.199.110]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u4OHtHsv21626992; Tue, 24 May 2016 17:55:18 GMT Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A6CA9AE034; Tue, 24 May 2016 13:55:18 -0400 (EDT) Received: from jianjun-w530.ibm.com (unknown [9.65.71.165]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP id 97F04AE03B; Tue, 24 May 2016 13:55:17 -0400 (EDT) From: Jianjun Duan To: qemu-devel@nongnu.org Date: Tue, 24 May 2016 10:55:06 -0700 Message-Id: <1464112509-21806-4-git-send-email-duanj@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1464112509-21806-1-git-send-email-duanj@linux.vnet.ibm.com> References: <1464112509-21806-1-git-send-email-duanj@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16052417-0045-0000-0000-000004482045 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 129.33.205.208 Subject: [Qemu-devel] [QEMU RFC PATCH v2 3/6] 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: duanj@linux.vnet.ibm.com, quintela@redhat.com, mdroth@linux.vnet.ibm.com, qemu-ppc@nongnu.org, amit.shah@redhat.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" 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), \