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authorThomas Richter <tmricht@linux.ibm.com>2018-07-09 11:30:34 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-07-23 14:49:56 +0300
commit933df441e771bb8b39e1d90f868bfbdae2ed2b40 (patch)
tree05f5354f38584f82322c800f3b09c4d7b24898c9 /drivers/s390
parent27c0620ce94798688a425cb04db0e7f568e44d52 (diff)
downloadlinux-933df441e771bb8b39e1d90f868bfbdae2ed2b40.tar.xz
s390 cio: Rewrite trace point in s390_cio_tsch
Tools like 'perf stat' parse the trace point format files defined in /sys/kernel/debug/tracing/events/s390/.../format to handle the print fmt: statement. The kernel provides a library in directory linux/tools/lib/traceevent/* for this reason. This library can not handle structures or unions defined in the TRACE_EVENT/TP_STRUCT__entry macros with __field_struct macro. There is no possibility to extract a structure member (which might be a bit field) since there is no packing information nor bit field offset by parsing the printf fmt line. Therefore rewrite the TRACE_EVENT macro and add the __field macro for the necessary members. Keep the __fieldstruct macro to extract the complete structure when dumps are analysed. Note that the same information is displayed, this is no interface change. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Acked-by: Sebastian Ott <sebott@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/trace.h22
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/s390/cio/trace.h b/drivers/s390/cio/trace.h
index 4337317f64fd..137410da1e9f 100644
--- a/drivers/s390/cio/trace.h
+++ b/drivers/s390/cio/trace.h
@@ -89,6 +89,13 @@ TRACE_EVENT(s390_cio_tsch,
__field(u8, ssid)
__field(u16, schno)
__field_struct(struct irb, irb)
+ __field(u8, scsw_dcc)
+ __field(u8, scsw_pno)
+ __field(u8, scsw_fctl)
+ __field(u8, scsw_actl)
+ __field(u8, scsw_stctl)
+ __field(u8, scsw_dstat)
+ __field(u8, scsw_cstat)
__field(int, cc)
),
TP_fast_assign(
@@ -96,15 +103,22 @@ TRACE_EVENT(s390_cio_tsch,
__entry->ssid = schid.ssid;
__entry->schno = schid.sch_no;
__entry->irb = *irb;
+ __entry->scsw_dcc = scsw_cc(&irb->scsw);
+ __entry->scsw_pno = scsw_pno(&irb->scsw);
+ __entry->scsw_fctl = scsw_fctl(&irb->scsw);
+ __entry->scsw_actl = scsw_actl(&irb->scsw);
+ __entry->scsw_stctl = scsw_stctl(&irb->scsw);
+ __entry->scsw_dstat = scsw_dstat(&irb->scsw);
+ __entry->scsw_cstat = scsw_cstat(&irb->scsw);
__entry->cc = cc;
),
TP_printk("schid=%x.%x.%04x cc=%d dcc=%d pno=%d fctl=0x%x actl=0x%x "
"stctl=0x%x dstat=0x%x cstat=0x%x",
__entry->cssid, __entry->ssid, __entry->schno, __entry->cc,
- scsw_cc(&__entry->irb.scsw), scsw_pno(&__entry->irb.scsw),
- scsw_fctl(&__entry->irb.scsw), scsw_actl(&__entry->irb.scsw),
- scsw_stctl(&__entry->irb.scsw),
- scsw_dstat(&__entry->irb.scsw), scsw_cstat(&__entry->irb.scsw)
+ __entry->scsw_dcc, __entry->scsw_pno,
+ __entry->scsw_fctl, __entry->scsw_actl,
+ __entry->scsw_stctl,
+ __entry->scsw_dstat, __entry->scsw_cstat
)
);