From patchwork Thu Apr 6 11:16:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 9666879 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 F0DE560364 for ; Thu, 6 Apr 2017 11:23:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED3FB2832D for ; Thu, 6 Apr 2017 11:23:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E22CF28354; Thu, 6 Apr 2017 11:23:26 +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 4F36F2832D for ; Thu, 6 Apr 2017 11:23:26 +0000 (UTC) Received: from localhost ([::1]:44914 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cw5Vd-0000LX-Br for patchwork-qemu-devel@patchwork.kernel.org; Thu, 06 Apr 2017 07:23:25 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43292) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cw5PT-0004O5-HA for qemu-devel@nongnu.org; Thu, 06 Apr 2017 07:17:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cw5PQ-0001cI-BP for qemu-devel@nongnu.org; Thu, 06 Apr 2017 07:17:03 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:56324 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 1cw5PQ-0001bz-5N for qemu-devel@nongnu.org; Thu, 06 Apr 2017 07:17:00 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v36BE1TP105623 for ; Thu, 6 Apr 2017 07:16:59 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0a-001b2d01.pphosted.com with ESMTP id 29nm3xa1aw-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 06 Apr 2017 07:16:59 -0400 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 6 Apr 2017 12:16:54 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v36BGsgj10289466; Thu, 6 Apr 2017 11:16:54 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E69D552063; Thu, 6 Apr 2017 11:14:56 +0100 (BST) Received: from gondolin.boeblingen.de.ibm.com (unknown [9.152.224.55]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id B1D7D52041; Thu, 6 Apr 2017 11:14:56 +0100 (BST) From: Cornelia Huck To: qemu-devel@nongnu.org Date: Thu, 6 Apr 2017 13:16:41 +0200 X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170406111646.12624-1-cornelia.huck@de.ibm.com> References: <20170406111646.12624-1-cornelia.huck@de.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17040611-0040-0000-0000-000003609E82 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17040611-0041-0000-0000-000024D83879 Message-Id: <20170406111646.12624-6-cornelia.huck@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-04-06_08:, , 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=8.0.1-1702020001 definitions=main-1704060093 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 for-2.10 05/10] s390x/css: provide introspection for virtual subchannel and device busid 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: Cornelia Huck , borntraeger@de.ibm.com, Dong Jia Shi , agraf@suse.de Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Dong Jia Shi Expose the busids of the virtual I/O subchannel and the virtual CCW device to ease debugging. This is needed because: 1. subchannel id are assigned dynamically, and cannot be set from outside. 2. device busid could possibly be auto generated. An example of using HMP to retrieve the property values of a virtio-balloon-ccw device looks like: [root@localhost ~]# lscss -d 0.0.0004 Device Subchan. DevType CU Type Use PIM PAM POM CHPIDs ---------------------------------------------------------------------- 0.0.0004 0.0.0003 0000/00 3832/05 yes 80 80 ff 00000000 00000000 (qemu) info qtree ... ... dev: virtio-balloon-ccw, id "balloon0" devno = "" ioeventfd = true max_revision = 2 (0x2) dev_id = "fe.0.0004" subch_id = "fe.0.0003" ... ... After migration, if we have the same device that shows up on a different subchannel, we must re-fill the subch_id of the ccw device with the new schid, or the subch_id will have an old wrong schid value. So this also re-fills the subch_id after migration. While we are at it, also neaten the related error handling a bit. Signed-off-by: Dong Jia Shi Signed-off-by: Cornelia Huck --- hw/s390x/ccw-device.c | 39 +++++++++++++++++++++++++++++++++++++++ hw/s390x/ccw-device.h | 7 +++++++ hw/s390x/virtio-ccw.c | 28 ++++++++++++++++++++++------ 3 files changed, 68 insertions(+), 6 deletions(-) diff --git a/hw/s390x/ccw-device.c b/hw/s390x/ccw-device.c index 28ea20440e..8fe3cf49ef 100644 --- a/hw/s390x/ccw-device.c +++ b/hw/s390x/ccw-device.c @@ -11,11 +11,50 @@ #include "qemu/osdep.h" #include "ccw-device.h" +static void ccw_device_refill_ids(CcwDevice *dev) +{ + SubchDev *sch = dev->sch; + + assert(sch); + + dev->dev_id.cssid = sch->cssid; + dev->dev_id.ssid = sch->ssid; + dev->dev_id.devid = sch->devno; + dev->dev_id.valid = true; + + dev->subch_id.cssid = sch->cssid; + dev->subch_id.ssid = sch->ssid; + dev->subch_id.devid = sch->schid; + dev->subch_id.valid = true; +} + +static void ccw_device_realize(CcwDevice *dev, Error **errp) +{ + ccw_device_refill_ids(dev); +} + +static Property ccw_device_properties[] = { + DEFINE_PROP_CSS_DEV_ID_RO("dev_id", CcwDevice, dev_id), + DEFINE_PROP_CSS_DEV_ID_RO("subch_id", CcwDevice, subch_id), + DEFINE_PROP_END_OF_LIST(), +}; + +static void ccw_device_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + CCWDeviceClass *k = CCW_DEVICE_CLASS(klass); + + k->realize = ccw_device_realize; + k->refill_ids = ccw_device_refill_ids; + dc->props = ccw_device_properties; +} + static const TypeInfo ccw_device_info = { .name = TYPE_CCW_DEVICE, .parent = TYPE_DEVICE, .instance_size = sizeof(CcwDevice), .class_size = sizeof(CCWDeviceClass), + .class_init = ccw_device_class_init, .abstract = true, }; diff --git a/hw/s390x/ccw-device.h b/hw/s390x/ccw-device.h index 59ba01b6c5..48700fe23a 100644 --- a/hw/s390x/ccw-device.h +++ b/hw/s390x/ccw-device.h @@ -19,12 +19,19 @@ typedef struct CcwDevice { DeviceState parent_obj; SubchDev *sch; /* .. */ + /* The user-set busid of the virtual ccw device. */ CssDevId bus_id; + /* The actual busid of the virtual ccw device. */ + CssDevId dev_id; + /* The actual busid of the virtual subchannel. */ + CssDevId subch_id; } CcwDevice; typedef struct CCWDeviceClass { DeviceClass parent_class; void (*unplug)(HotplugHandler *, DeviceState *, Error **); + void (*realize)(CcwDevice *, Error **); + void (*refill_ids)(CcwDevice *); } CCWDeviceClass; static inline CcwDevice *to_ccw_dev_fast(DeviceState *d) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 00b3bde4e9..4e59e34d74 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -680,6 +680,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) { VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev); CcwDevice *ccw_dev = CCW_DEVICE(dev); + CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev); SubchDev *sch = css_create_virtual_sch(ccw_dev->bus_id, errp); Error *err = NULL; @@ -689,8 +690,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) { error_setg(&err, "Invalid value of property max_rev " "(is %d expected >= 1)", virtio_ccw_rev_max(dev)); - error_propagate(errp, err); - return; + goto out_err; } sch->driver_data = dev; @@ -713,13 +713,24 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) if (k->realize) { k->realize(dev, &err); + if (err) { + goto out_err; + } } + + ck->realize(ccw_dev, &err); if (err) { - error_propagate(errp, err); - css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); - ccw_dev->sch = NULL; - g_free(sch); + goto out_err; } + + return; + +out_err: + error_propagate(errp, err); + css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); + ccw_dev->sch = NULL; + g_free(sch); + return; } static int virtio_ccw_exit(VirtioCcwDevice *dev) @@ -1261,12 +1272,17 @@ static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) { VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); CcwDevice *ccw_dev = CCW_DEVICE(d); + CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev); SubchDev *s = ccw_dev->sch; VirtIODevice *vdev = virtio_ccw_get_vdev(s); int len; s->driver_data = dev; subch_device_load(s, f); + /* Re-fill subch_id after loading the subchannel states.*/ + if (ck->refill_ids) { + ck->refill_ids(ccw_dev); + } len = qemu_get_be32(f); if (len != 0) { dev->indicators = get_indicator(qemu_get_be64(f), len);