From patchwork Thu May 18 20:35:47 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: 764186 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wTNNK6tTPz9s65 for ; Fri, 19 May 2017 06:40:01 +1000 (AEST) Received: from localhost ([::1]:55435 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dBSDH-0004xO-Ic for incoming@patchwork.ozlabs.org; Thu, 18 May 2017 16:39:59 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44858) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dBS9j-0002as-Cc for qemu-devel@nongnu.org; Thu, 18 May 2017 16:36:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dBS9e-0005vD-DD for qemu-devel@nongnu.org; Thu, 18 May 2017 16:36:19 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36395 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 1dBS9e-0005uv-8A for qemu-devel@nongnu.org; Thu, 18 May 2017 16:36:14 -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 v4IKY4Zr099777 for ; Thu, 18 May 2017 16:36:13 -0400 Received: from e24smtp02.br.ibm.com (e24smtp02.br.ibm.com [32.104.18.86]) by mx0b-001b2d01.pphosted.com with ESMTP id 2ahjca10ch-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 18 May 2017 16:36:13 -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 17:36:08 -0300 Received: from d24av03.br.ibm.com (d24av03.br.ibm.com [9.8.31.95]) by d24relay03.br.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4IKa8Ln27852932; Thu, 18 May 2017 17:36:08 -0300 Received: from d24av03.br.ibm.com (localhost [127.0.0.1]) by d24av03.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v4IKa8np021720; Thu, 18 May 2017 17:36:09 -0300 Received: from localhost.localdomain ([9.80.214.94]) by d24av03.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v4IKZsrT021455; Thu, 18 May 2017 17:36:07 -0300 From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Date: Thu, 18 May 2017 17:35:47 -0300 X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170518203548.14207-1-danielhb@linux.vnet.ibm.com> References: <20170518203548.14207-1-danielhb@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 17051820-0020-0000-0000-000002AAB836 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17051820-0021-0000-0000-000030C82C18 Message-Id: <20170518203548.14207-5-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-1705180140 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 v10 4/5] hw/ppc/spapr.c: recover pending LMB unplug info in spapr_lmb_release 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" When a LMB hot unplug starts, the current DRC LMB status is stored at spapr->pending_dimm_unplugs QTAILQ. This queue isn't migrated, thus if a migration occurs in the middle of a LMB unplug the spapr_lmb_release callback will lost track of the LMB unplug progress. This patch implements a new recover function spapr_recover_pending_dimm_state that is used inside spapr_lmb_release to recover this DRC LMB release status that is lost during the migration. Signed-off-by: Daniel Henrique Barboza --- hw/ppc/spapr.c | 39 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 5602cfc..7d304fc 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2649,6 +2649,36 @@ static uint64_t spapr_dimm_get_address(PCDIMMDevice *dimm) return addr; } +static sPAPRDIMMState *spapr_recover_pending_dimm_state(PCDIMMDevice *dimm, + uint64_t addr) +{ + sPAPRDRConnector *drc; + PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); + MemoryRegion *mr = ddc->get_memory_region(dimm); + uint64_t curr_addr = addr; + uint64_t size = memory_region_size(mr); + uint32_t nr_lmbs = size / SPAPR_MEMORY_BLOCK_SIZE; + uint32_t avail_lmbs = 0; + int i = 0; + + for (i = 0; i < nr_lmbs; i++) { + drc = spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_LMB, + curr_addr / SPAPR_MEMORY_BLOCK_SIZE); + g_assert(drc); + if (drc->indicator_state != SPAPR_DR_INDICATOR_STATE_INACTIVE) { + avail_lmbs++; + } + curr_addr += SPAPR_MEMORY_BLOCK_SIZE; + } + + sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); + sPAPRDIMMState *ds = g_malloc0(sizeof(sPAPRDIMMState)); + ds->nr_lmbs = avail_lmbs; + ds->addr = addr; + spapr_pending_dimm_unplugs_add(spapr, ds); + return ds; +} + /* Callback to be called during DRC release. */ void spapr_lmb_release(DeviceState *dev) { @@ -2657,7 +2687,14 @@ void spapr_lmb_release(DeviceState *dev) sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); sPAPRDIMMState *ds = spapr_pending_dimm_unplugs_find(spapr, addr); - if (--ds->nr_lmbs) { + /* This information will get lost if a migration occurs + * during the unplug process. In this case recover it. */ + if (ds == NULL) { + ds = spapr_recover_pending_dimm_state(PC_DIMM(dev), addr); + if (ds->nr_lmbs) { + return; + } + } else if (--ds->nr_lmbs) { return; }