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linux/drivers/s390/cio/vfio_ccw_trace.c

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vfio-ccw: Refactor how the traces are built Commit 3cd90214b70f ("vfio: ccw: add tracepoints for interesting error paths") added a quick trace point to determine where a channel program failed while being processed. It's a great addition, but adding more traces to vfio-ccw is more cumbersome than it needs to be. Let's refactor how this is done, so that additional traces are easier to add and can exist outside of the FSM if we ever desire. Signed-off-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Message-Id: <20191016142040.14132-2-farman@linux.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-16 22:20:37 +08:00
// SPDX-License-Identifier: GPL-2.0
/*
* Tracepoint definitions for vfio_ccw
*
* Copyright IBM Corp. 2019
* Author(s): Eric Farman <farman@linux.ibm.com>
*/
#define CREATE_TRACE_POINTS
#include "vfio_ccw_trace.h"
vfio-ccw: Add a trace for asynchronous requests 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 <farman@linux.ibm.com> Message-Id: <20191016142040.14132-4-farman@linux.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-16 22:20:39 +08:00
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_async_request);
vfio-ccw: Trace the FSM jumptable 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 <farman@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Message-Id: <20191016142040.14132-3-farman@linux.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-16 22:20:38 +08:00
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_event);
vfio-ccw: Rework the io_fctl trace Using __field_struct for the schib is convenient, but it doesn't appear to let us filter based on any of the schib elements. Specifying the full schid or any element within it results in various errors by the parser. So, expand that out to its component elements, so we can limit the trace to a single device. While we are at it, rename this trace to the function name, so we remember what is being traced instead of an abstract reference to the function control bit of the SCSW. Signed-off-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Message-Id: <20191016142040.14132-5-farman@linux.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-16 22:20:40 +08:00
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_io_request);