From nobody Sun Feb 8 14:52:27 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495482094575799.0980122887577; Mon, 22 May 2017 12:41:34 -0700 (PDT) Received: from localhost ([::1]:44584 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dCtCv-0000dr-8e for importer@patchew.org; Mon, 22 May 2017 15:41:33 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39620) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dCt7y-0005I7-Dr for qemu-devel@nongnu.org; Mon, 22 May 2017 15:36:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dCt7u-0000En-Go for qemu-devel@nongnu.org; Mon, 22 May 2017 15:36:26 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:48686 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 1dCt7u-0000EV-BJ for qemu-devel@nongnu.org; Mon, 22 May 2017 15:36:22 -0400 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4MJ9HQS049971 for ; Mon, 22 May 2017 15:36:21 -0400 Received: from e24smtp05.br.ibm.com (e24smtp05.br.ibm.com [32.104.18.26]) by mx0a-001b2d01.pphosted.com with ESMTP id 2am3ek6p0q-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 22 May 2017 15:36:21 -0400 Received: from localhost by e24smtp05.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 22 May 2017 16:36:17 -0300 Received: from d24av02.br.ibm.com (d24av02.br.ibm.com [9.8.31.93]) by d24relay04.br.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4MJaHLx4915614; Mon, 22 May 2017 16:36:17 -0300 Received: from d24av02.br.ibm.com (localhost [127.0.0.1]) by d24av02.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v4MJaGSS017173; Mon, 22 May 2017 16:36:17 -0300 Received: from localhost.localdomain ([9.85.129.159]) by d24av02.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v4MJa2uX017026; Mon, 22 May 2017 16:36:14 -0300 From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Date: Mon, 22 May 2017 16:35:50 -0300 X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170522193551.826-1-danielhb@linux.vnet.ibm.com> References: <20170522193551.826-1-danielhb@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 17052219-0032-0000-0000-00000560FBAC X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17052219-0033-0000-0000-000011E661E2 Message-Id: <20170522193551.826-5-danielhb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-22_10:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1705220098 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 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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_sta= te 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 | 47 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 463177e..c4473b9 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2645,6 +2645,44 @@ static void spapr_pending_dimm_unplugs_remove(sPAPRM= achineState *spapr, g_free(dimm_state); } =20 +static sPAPRDIMMState *spapr_recover_pending_dimm_state(sPAPRMachineState = *ms, + PCDIMMDevice *dimm) +{ + sPAPRDRConnector *drc; + PCDIMMDeviceClass *ddc =3D PC_DIMM_GET_CLASS(dimm); + MemoryRegion *mr =3D ddc->get_memory_region(dimm); + uint64_t size =3D memory_region_size(mr); + uint32_t nr_lmbs =3D size / SPAPR_MEMORY_BLOCK_SIZE; + uint32_t avail_lmbs =3D 0; + + Error *local_err =3D NULL; + uint64_t addr; + addr =3D object_property_get_int(OBJECT(dimm), PC_DIMM_ADDR_PROP, + &local_err); + if (local_err) { + error_propagate(&error_abort, local_err); + return 0; + } + + uint64_t curr_addr =3D addr; + int i; + for (i =3D 0; i < nr_lmbs; i++) { + drc =3D spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_LMB, + curr_addr / SPAPR_MEMORY_BLOCK_SIZE= ); + g_assert(drc); + if (drc->indicator_state !=3D SPAPR_DR_INDICATOR_STATE_INACTIVE) { + avail_lmbs++; + } + curr_addr +=3D SPAPR_MEMORY_BLOCK_SIZE; + } + + sPAPRDIMMState *ds =3D g_malloc0(sizeof(sPAPRDIMMState)); + ds->nr_lmbs =3D avail_lmbs; + ds->dimm =3D dimm; + spapr_pending_dimm_unplugs_add(ms, ds); + return ds; +} + /* Callback to be called during DRC release. */ void spapr_lmb_release(DeviceState *dev) { @@ -2652,7 +2690,14 @@ void spapr_lmb_release(DeviceState *dev) sPAPRMachineState *spapr =3D SPAPR_MACHINE(hotplug_ctrl); sPAPRDIMMState *ds =3D spapr_pending_dimm_unplugs_find(spapr, PC_DIMM(= dev)); =20 - if (--ds->nr_lmbs) { + /* This information will get lost if a migration occurs + * during the unplug process. In this case recover it. */ + if (ds =3D=3D NULL) { + ds =3D spapr_recover_pending_dimm_state(spapr, PC_DIMM(dev)); + if (ds->nr_lmbs) { + return; + } + } else if (--ds->nr_lmbs) { return; } =20 --=20 2.9.4