From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:22664 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732761AbfJNSJG (ORCPT ); Mon, 14 Oct 2019 14:09:06 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9EHvhGd083874 for ; Mon, 14 Oct 2019 14:09:05 -0400 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0a-001b2d01.pphosted.com with ESMTP id 2vmwes19aw-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 14 Oct 2019 14:09:04 -0400 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 14 Oct 2019 19:09:02 +0100 From: Eric Farman Subject: [RFC PATCH 3/4] vfio-ccw: Add a trace for asynchronous requests Date: Mon, 14 Oct 2019 20:08:54 +0200 In-Reply-To: <20191014180855.19400-1-farman@linux.ibm.com> References: <20191014180855.19400-1-farman@linux.ibm.com> Message-Id: <20191014180855.19400-4-farman@linux.ibm.com> Sender: linux-s390-owner@vger.kernel.org List-ID: To: Cornelia Huck , Halil Pasic Cc: Jason Herne , Jared Rossi , linux-s390@vger.kernel.org, kvm@vger.kernel.org, Eric Farman Since the asynchronous requests are typically associated with error recovery, let's add a simple trace when one of those is issued to a device. Signed-off-by: Eric Farman --- drivers/s390/cio/vfio_ccw_fsm.c | 4 ++++ drivers/s390/cio/vfio_ccw_trace.c | 1 + drivers/s390/cio/vfio_ccw_trace.h | 26 ++++++++++++++++++++++++++ 3 files changed, 31 insertions(+) diff --git a/drivers/s390/cio/vfio_ccw_fsm.c b/drivers/s390/cio/vfio_ccw_fsm.c index d4119e4c4a8c..23648a9aa721 100644 --- a/drivers/s390/cio/vfio_ccw_fsm.c +++ b/drivers/s390/cio/vfio_ccw_fsm.c @@ -341,6 +341,10 @@ static void fsm_async_request(struct vfio_ccw_private *private, /* should not happen? */ cmd_region->ret_code = -EINVAL; } + + trace_vfio_ccw_fsm_async_request(get_schid(private), + cmd_region->command, + cmd_region->ret_code); } /* diff --git a/drivers/s390/cio/vfio_ccw_trace.c b/drivers/s390/cio/vfio_ccw_trace.c index b37bc68e7f18..37ecbf8be805 100644 --- a/drivers/s390/cio/vfio_ccw_trace.c +++ b/drivers/s390/cio/vfio_ccw_trace.c @@ -9,5 +9,6 @@ #define CREATE_TRACE_POINTS #include "vfio_ccw_trace.h" +EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_async_request); 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 24a8152acfdf..4be2e36242e6 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_async_request, + TP_PROTO(struct subchannel_id schid, + int command, + int errno), + TP_ARGS(schid, command, errno), + + TP_STRUCT__entry( + __field_struct(struct subchannel_id, schid) + __field(int, command) + __field(int, errno) + ), + + TP_fast_assign( + __entry->schid = schid; + __entry->command = command; + __entry->errno = errno; + ), + + TP_printk("schid=%x.%x.%04x command=%d errno=%d", + __entry->schid.cssid, + __entry->schid.ssid, + __entry->schid.sch_no, + __entry->command, + __entry->errno) +); + TRACE_EVENT(vfio_ccw_fsm_event, TP_PROTO(struct subchannel_id schid, int state, int event), TP_ARGS(schid, state, event), -- 2.17.1