From patchwork Fri Apr 21 07:40:32 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 753177 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 3w8STg5JChz9s73 for ; Fri, 21 Apr 2017 17:45:59 +1000 (AEST) Received: from localhost ([::1]:57675 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d1TGP-0004gy-5d for incoming@patchwork.ozlabs.org; Fri, 21 Apr 2017 03:45:57 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40702) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d1TBZ-00012b-GS for qemu-devel@nongnu.org; Fri, 21 Apr 2017 03:41:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d1TBW-0000eX-Cp for qemu-devel@nongnu.org; Fri, 21 Apr 2017 03:40:57 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:44155 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 1d1TBW-0000eK-6n for qemu-devel@nongnu.org; Fri, 21 Apr 2017 03:40:54 -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 v3L7cY1D008201 for ; Fri, 21 Apr 2017 03:40:53 -0400 Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) by mx0a-001b2d01.pphosted.com with ESMTP id 29xucaxkkb-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 21 Apr 2017 03:40:53 -0400 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 21 Apr 2017 08:40:47 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v3L7elWF38928590; Fri, 21 Apr 2017 07:40:47 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D718842045; Fri, 21 Apr 2017 08:39:44 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9D3F04204D; Fri, 21 Apr 2017 08:39:44 +0100 (BST) Received: from gondolin.boeblingen.de.ibm.com (unknown [9.152.224.84]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Fri, 21 Apr 2017 08:39:44 +0100 (BST) From: Cornelia Huck To: peter.maydell@linaro.org Date: Fri, 21 Apr 2017 09:40:32 +0200 X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170421074038.774-1-cornelia.huck@de.ibm.com> References: <20170421074038.774-1-cornelia.huck@de.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17042107-0012-0000-0000-00000511F108 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17042107-0013-0000-0000-000018235D0F Message-Id: <20170421074038.774-6-cornelia.huck@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-04-21_06:, , 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-1704210143 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PULL 05/11] 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, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" 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 | 27 +++++++++++++++++++++------ 3 files changed, 67 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..b71ea94118 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 +713,23 @@ 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); } static int virtio_ccw_exit(VirtioCcwDevice *dev) @@ -1261,12 +1271,17 @@ 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);