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trace: platform/x86/intel/ifs: Add trace point to track Intel IFS operations

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Add tracing support which may be useful for debugging systems that fail to complete
In Field Scan tests.

Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220506225410.1652287-11-tony.luck@intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Tony Luck
2022-05-06 15:54:08 -07:00
committed by Hans de Goede
parent 6f33a92b92
commit 51af802fc0
3 changed files with 47 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
MAINTAINERS
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@@ -9865,6 +9865,7 @@ R: Ashok Raj <ashok.raj@intel.com>
R: Tony Luck <tony.luck@intel.com> R: Tony Luck <tony.luck@intel.com>
S: Maintained S: Maintained
F: drivers/platform/x86/intel/ifs F: drivers/platform/x86/intel/ifs
F: include/trace/events/intel_ifs.h
INTEL INTEGRATED SENSOR HUB DRIVER INTEL INTEGRATED SENSOR HUB DRIVER
M: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> M: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

5
drivers/platform/x86/intel/ifs/runtest.c
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@@ -17,6 +17,9 @@
* core will update results of the test. * core will update results of the test.
*/ */
#define CREATE_TRACE_POINTS
#include <trace/events/intel_ifs.h>
/* Max retries on the same chunk */ /* Max retries on the same chunk */
#define MAX_IFS_RETRIES 5 #define MAX_IFS_RETRIES 5
@@ -191,6 +194,8 @@ static void ifs_test_core(int cpu, struct device *dev)
status.data = msrvals[1]; status.data = msrvals[1];
trace_ifs_status(cpu, activate, status);
/* Some cases can be retried, give up for others */ /* Some cases can be retried, give up for others */
if (!can_restart(status)) if (!can_restart(status))
break; break;

41
include/trace/events/intel_ifs.h Normal file
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@@ -0,0 +1,41 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM intel_ifs
#if !defined(_TRACE_IFS_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_IFS_H
#include <linux/ktime.h>
#include <linux/tracepoint.h>
TRACE_EVENT(ifs_status,
TP_PROTO(int cpu, union ifs_scan activate, union ifs_status status),
TP_ARGS(cpu, activate, status),
TP_STRUCT__entry(
__field( u64, status )
__field( int, cpu )
__field( u8, start )
__field( u8, stop )
),
TP_fast_assign(
__entry->cpu = cpu;
__entry->start = activate.start;
__entry->stop = activate.stop;
__entry->status = status.data;
),
TP_printk("cpu: %d, start: %.2x, stop: %.2x, status: %llx",
__entry->cpu,
__entry->start,
__entry->stop,
__entry->status)
);
#endif /* _TRACE_IFS_H */
/* This part must be outside protection */
#include <trace/define_trace.h>