From patchwork Thu May 18 20:24:02 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Henrique Barboza X-Patchwork-Id: 9735215 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 9661D601BC for ; Thu, 18 May 2017 20:27:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7D8A528778 for ; Thu, 18 May 2017 20:27:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 722842888E; Thu, 18 May 2017 20:27:31 +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 0CB962879E for ; Thu, 18 May 2017 20:27:31 +0000 (UTC) Received: from localhost ([::1]:55384 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dBS1C-0007Gi-9Z for patchwork-qemu-devel@patchwork.kernel.org; Thu, 18 May 2017 16:27:30 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41384) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dBRyG-0005lQ-8N for qemu-devel@nongnu.org; Thu, 18 May 2017 16:24:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dBRyD-0001cm-0l for qemu-devel@nongnu.org; Thu, 18 May 2017 16:24:28 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:34161 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dBRyC-0001bk-RV for qemu-devel@nongnu.org; Thu, 18 May 2017 16:24:24 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4IKIkMX065048 for ; Thu, 18 May 2017 16:24:24 -0400 Received: from e24smtp02.br.ibm.com (e24smtp02.br.ibm.com [32.104.18.86]) by mx0b-001b2d01.pphosted.com with ESMTP id 2ahjca0knr-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 18 May 2017 16:24:24 -0400 Received: from localhost by e24smtp02.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 18 May 2017 17:24:21 -0300 Received: from d24av04.br.ibm.com (d24av04.br.ibm.com [9.8.31.97]) by d24relay04.br.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4IKOKUt64618508; Thu, 18 May 2017 17:24:20 -0300 Received: from d24av04.br.ibm.com (localhost [127.0.0.1]) by d24av04.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v4IKOKAZ020300; Thu, 18 May 2017 17:24:20 -0300 Received: from localhost.localdomain ([9.80.214.94]) by d24av04.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v4IKOBHA020127; Thu, 18 May 2017 17:24:18 -0300 From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Date: Thu, 18 May 2017 17:24:02 -0300 X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170518202402.12571-1-danielhb@linux.vnet.ibm.com> References: <20170518202402.12571-1-danielhb@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 17051820-0020-0000-0000-000002AAB67B X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17051820-0021-0000-0000-000030C82A5E Message-Id: <20170518202402.12571-3-danielhb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-18_04:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1705180138 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v11 2/2] migration: spapr: migrate pending_events of spapr state 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: 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-Virus-Scanned: ClamAV using ClamSMTP From: Jianjun Duan In racing situations between hotplug events and migration operation, a rtas hotplug event could have not yet be delivered to the source guest when migration is started. In this case the pending_events of spapr state need be transmitted to the target so that the hotplug event can be finished on the target. All the different fields of the events are encoded as defined by PAPR. We can migrate them as uint8_t binary stream without any concerns about data padding or endianess. pending_events is put in a subsection in the spapr state VMSD to make sure migration across different versions is not broken. Signed-off-by: Jianjun Duan Signed-off-by: Daniel Henrique Barboza --- hw/ppc/spapr.c | 32 ++++++++++++++++++++++++++++++++ hw/ppc/spapr_events.c | 1 + include/hw/ppc/spapr.h | 3 ++- 3 files changed, 35 insertions(+), 1 deletion(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 0980d73..5afd328 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1444,6 +1444,37 @@ static bool version_before_3(void *opaque, int version_id) return version_id < 3; } +static bool spapr_pending_events_needed(void *opaque) +{ + sPAPRMachineState *spapr = (sPAPRMachineState *)opaque; + return !QTAILQ_EMPTY(&spapr->pending_events); +} + +static const VMStateDescription vmstate_spapr_event_entry = { + .name = "spapr_event_log_entry", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_INT32(log_type, sPAPREventLogEntry), + VMSTATE_UINT32(data_size, sPAPREventLogEntry), + VMSTATE_VBUFFER_ALLOC_UINT32(data, sPAPREventLogEntry, 0, + NULL, data_size), + VMSTATE_END_OF_LIST() + }, +}; + +static const VMStateDescription vmstate_spapr_pending_events = { + .name = "spapr_pending_events", + .version_id = 1, + .minimum_version_id = 1, + .needed = spapr_pending_events_needed, + .fields = (VMStateField[]) { + VMSTATE_QTAILQ_V(pending_events, sPAPRMachineState, 1, + vmstate_spapr_event_entry, sPAPREventLogEntry, next), + VMSTATE_END_OF_LIST() + }, +}; + static bool spapr_ov5_cas_needed(void *opaque) { sPAPRMachineState *spapr = opaque; @@ -1542,6 +1573,7 @@ static const VMStateDescription vmstate_spapr = { .subsections = (const VMStateDescription*[]) { &vmstate_spapr_ov5_cas, &vmstate_spapr_patb_entry, + &vmstate_spapr_pending_events, NULL } }; diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c index 73e2a18..96c1605 100644 --- a/hw/ppc/spapr_events.c +++ b/hw/ppc/spapr_events.c @@ -350,6 +350,7 @@ static void rtas_event_log_queue(int log_type, void *data) g_assert(data); entry->log_type = log_type; entry->data = data; + entry->data_size = sizeof(*data); QTAILQ_INSERT_TAIL(&spapr->pending_events, entry, next); } diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 02239a5..0554e11 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -597,8 +597,9 @@ struct sPAPRTCETable { sPAPRTCETable *spapr_tce_find_by_liobn(target_ulong liobn); struct sPAPREventLogEntry { - int log_type; + int32_t log_type; void *data; + uint32_t data_size; QTAILQ_ENTRY(sPAPREventLogEntry) next; };