From patchwork Wed Oct 16 01:58:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Farman X-Patchwork-Id: 11192207 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D2EA118A6 for ; Wed, 16 Oct 2019 01:58:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BC2AE20873 for ; Wed, 16 Oct 2019 01:58:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388822AbfJPB6c (ORCPT ); Tue, 15 Oct 2019 21:58:32 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:30344 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727479AbfJPB6b (ORCPT ); Tue, 15 Oct 2019 21:58:31 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9G1q4iI029583 for ; Tue, 15 Oct 2019 21:58:29 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0b-001b2d01.pphosted.com with ESMTP id 2vnmh0guce-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 15 Oct 2019 21:58:29 -0400 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 16 Oct 2019 02:58:26 +0100 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9G1wOlY25755696 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 16 Oct 2019 01:58:24 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7D0B211C054; Wed, 16 Oct 2019 01:58:24 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 699C611C04C; Wed, 16 Oct 2019 01:58:24 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Wed, 16 Oct 2019 01:58:24 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 4958) id D1E76E0205; Wed, 16 Oct 2019 03:58:23 +0200 (CEST) From: Eric Farman To: Cornelia Huck , Steffen Maier , Halil Pasic Cc: Jason Herne , Jared Rossi , linux-s390@vger.kernel.org, kvm@vger.kernel.org, Eric Farman Subject: [PATCH v2 2/4] vfio-ccw: Trace the FSM jumptable Date: Wed, 16 Oct 2019 03:58:20 +0200 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191016015822.72425-1-farman@linux.ibm.com> References: <20191016015822.72425-1-farman@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19101601-0016-0000-0000-000002B86736 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19101601-0017-0000-0000-0000331987A7 Message-Id: <20191016015822.72425-3-farman@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-10-15_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910160015 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org It would be nice if we could track the sequence of events within vfio-ccw, based on the state of the device/FSM and our calling sequence within it. So let's add a simple trace here so we can watch the states change as things go, and allow it to be folded into the rest of the other cio traces. Signed-off-by: Eric Farman Reviewed-by: Cornelia Huck --- drivers/s390/cio/vfio_ccw_private.h | 1 + drivers/s390/cio/vfio_ccw_trace.c | 1 + drivers/s390/cio/vfio_ccw_trace.h | 26 ++++++++++++++++++++++++++ 3 files changed, 28 insertions(+) diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h index bbe9babf767b..9b9bb4982972 100644 --- a/drivers/s390/cio/vfio_ccw_private.h +++ b/drivers/s390/cio/vfio_ccw_private.h @@ -135,6 +135,7 @@ extern fsm_func_t *vfio_ccw_jumptable[NR_VFIO_CCW_STATES][NR_VFIO_CCW_EVENTS]; static inline void vfio_ccw_fsm_event(struct vfio_ccw_private *private, int event) { + trace_vfio_ccw_fsm_event(private->sch->schid, private->state, event); vfio_ccw_jumptable[private->state][event](private, event); } diff --git a/drivers/s390/cio/vfio_ccw_trace.c b/drivers/s390/cio/vfio_ccw_trace.c index d5cc943c6864..b37bc68e7f18 100644 --- a/drivers/s390/cio/vfio_ccw_trace.c +++ b/drivers/s390/cio/vfio_ccw_trace.c @@ -9,4 +9,5 @@ #define CREATE_TRACE_POINTS #include "vfio_ccw_trace.h" +EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_event); EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_io_fctl); diff --git a/drivers/s390/cio/vfio_ccw_trace.h b/drivers/s390/cio/vfio_ccw_trace.h index 2a2937a40124..5005d57901b4 100644 --- a/drivers/s390/cio/vfio_ccw_trace.h +++ b/drivers/s390/cio/vfio_ccw_trace.h @@ -17,6 +17,32 @@ #include +TRACE_EVENT(vfio_ccw_fsm_event, + TP_PROTO(struct subchannel_id schid, int state, int event), + TP_ARGS(schid, state, event), + + TP_STRUCT__entry( + __field(u8, cssid) + __field(u8, ssid) + __field(u16, schno) + __field(int, state) + __field(int, event) + ), + + TP_fast_assign( + __entry->cssid = schid.cssid; + __entry->ssid = schid.ssid; + __entry->schno = schid.sch_no; + __entry->state = state; + __entry->event = event; + ), + + TP_printk("schid=%x.%x.%04x state=%d event=%d", + __entry->cssid, __entry->ssid, __entry->schno, + __entry->state, + __entry->event) +); + TRACE_EVENT(vfio_ccw_io_fctl, TP_PROTO(int fctl, struct subchannel_id schid, int errno, char *errstr), TP_ARGS(fctl, schid, errno, errstr),