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authorThomas Tai <thomas.tai@oracle.com>2018-05-09 02:04:56 +0300
committerBjorn Helgaas <bhelgaas@google.com>2018-05-10 16:34:52 +0300
commit2af8641b2ad3c0faf1ba63e989ca2f2f2134e10d (patch)
treecefca5626022c7c7e4c013012acde9abb96d135e /include/ras
parent5d0b401f4cf7a8fa6be25e83ad9d1075f3f75194 (diff)
downloadlinux-2af8641b2ad3c0faf1ba63e989ca2f2f2134e10d.tar.xz
PCI/AER: Add TLP header information to tracepoint
When a PCIe AER error occurs, the TLP header information is printed in the kernel message but it is missing from the tracepoint. A userspace program can use this information in the tracepoint to better analyze problems. To enable the tracepoint: echo 1 > /sys/kernel/debug/tracing/events/ras/aer_event/enable Example tracepoint output: $ cat /sys/kernel/debug/tracing/trace aer_event: 0000:01:00.0 PCIe Bus Error: severity=Uncorrected, non-fatal, Completer Abort TLP Header={0x0,0x1,0x2,0x3} Signed-off-by: Thomas Tai <thomas.tai@oracle.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/ras')
-rw-r--r--include/ras/ras_event.h22
1 files changed, 18 insertions, 4 deletions
diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index 9c689868eb4d..a0794632fd01 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -298,30 +298,44 @@ TRACE_EVENT(non_standard_event,
TRACE_EVENT(aer_event,
TP_PROTO(const char *dev_name,
const u32 status,
- const u8 severity),
+ const u8 severity,
+ const u8 tlp_header_valid,
+ struct aer_header_log_regs *tlp),
- TP_ARGS(dev_name, status, severity),
+ TP_ARGS(dev_name, status, severity, tlp_header_valid, tlp),
TP_STRUCT__entry(
__string( dev_name, dev_name )
__field( u32, status )
__field( u8, severity )
+ __field( u8, tlp_header_valid)
+ __array( u32, tlp_header, 4 )
),
TP_fast_assign(
__assign_str(dev_name, dev_name);
__entry->status = status;
__entry->severity = severity;
+ __entry->tlp_header_valid = tlp_header_valid;
+ if (tlp_header_valid) {
+ __entry->tlp_header[0] = tlp->dw0;
+ __entry->tlp_header[1] = tlp->dw1;
+ __entry->tlp_header[2] = tlp->dw2;
+ __entry->tlp_header[3] = tlp->dw3;
+ }
),
- TP_printk("%s PCIe Bus Error: severity=%s, %s\n",
+ TP_printk("%s PCIe Bus Error: severity=%s, %s, TLP Header=%s\n",
__get_str(dev_name),
__entry->severity == AER_CORRECTABLE ? "Corrected" :
__entry->severity == AER_FATAL ?
"Fatal" : "Uncorrected, non-fatal",
__entry->severity == AER_CORRECTABLE ?
__print_flags(__entry->status, "|", aer_correctable_errors) :
- __print_flags(__entry->status, "|", aer_uncorrectable_errors))
+ __print_flags(__entry->status, "|", aer_uncorrectable_errors),
+ __entry->tlp_header_valid ?
+ __print_array(__entry->tlp_header, 4, 4) :
+ "Not available")
);
/*