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SubjectRe: [PATCH 1/3] trace, cxl: Introduce a TRACE_EVENT for CXL Poison Records
On Tue, 14 Jun 2022, alison.schofield@intel.com wrote:

>From: Alison Schofield <alison.schofield@intel.com>
>
>Add a trace event for CXL Poison List Media Error Records that
>includes the starting DPA of the poison, the length, and the
>the source of the poison.
>
>This trace event will be used by the CXL_MEM driver to log the
>Media Errors returned by the GET_POISON_LIST Mailbox command.
>
>Signed-off-by: Alison Schofield <alison.schofield@intel.com>
>Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>

>---
> include/trace/events/cxl.h | 60 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 60 insertions(+)
> create mode 100644 include/trace/events/cxl.h
>
>diff --git a/include/trace/events/cxl.h b/include/trace/events/cxl.h
>new file mode 100644
>index 000000000000..17e707c3817e
>--- /dev/null
>+++ b/include/trace/events/cxl.h
>@@ -0,0 +1,60 @@
>+/* SPDX-License-Identifier: GPL-2.0 */
>+#undef TRACE_SYSTEM
>+#define TRACE_SYSTEM cxl
>+
>+#if !defined(_CXL_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
>+#define _CXL_TRACE_H
>+
>+#include <linux/tracepoint.h>
>+
>+TRACE_DEFINE_ENUM(CXL_POISON_SOURCE_UNKNOWN);
>+TRACE_DEFINE_ENUM(CXL_POISON_SOURCE_INTERNAL);
>+TRACE_DEFINE_ENUM(CXL_POISON_SOURCE_EXTERNAL);
>+TRACE_DEFINE_ENUM(CXL_POISON_SOURCE_INJECTED);
>+TRACE_DEFINE_ENUM(CXL_POISON_SOURCE_VENDOR);
>+TRACE_DEFINE_ENUM(CXL_POISON_SOURCE_INVALID);
>+
>+#define show_poison_source(source) \
>+ __print_symbolic(source, \
>+ {CXL_POISON_SOURCE_UNKNOWN, "UNKNOWN"}, \
>+ {CXL_POISON_SOURCE_EXTERNAL, "EXTERNAL"}, \
>+ {CXL_POISON_SOURCE_INTERNAL, "INTERNAL"}, \
>+ {CXL_POISON_SOURCE_INJECTED, "INJECTED"}, \
>+ {CXL_POISON_SOURCE_VENDOR, "VENDOR"}, \
>+ {CXL_POISON_SOURCE_INVALID, "INVALID"})
>+
>+TRACE_EVENT(cxl_poison_list,
>+
>+ TP_PROTO(struct device *dev,
>+ int source,
>+ unsigned long start,
>+ unsigned int length),
>+
>+ TP_ARGS(dev, source, start, length),
>+
>+ TP_STRUCT__entry(
>+ __string(name, dev_name(dev))
>+ __field(int, source)
>+ __field(u64, start)
>+ __field(u32, length)
>+ ),
>+
>+ TP_fast_assign(
>+ __assign_str(name, dev_name(dev));
>+ __entry->source = source;
>+ __entry->start = start;
>+ __entry->length = length;
>+ ),
>+
>+ TP_printk("dev %s source %s start %llu length %u",
>+ __get_str(name),
>+ show_poison_source(__entry->source),
>+ __entry->start,
>+ __entry->length)
>+);
>+#endif /* _CXL_TRACE_H */
>+
>+/* This part must be outside protection */
>+#undef TRACE_INCLUDE_FILE
>+#define TRACE_INCLUDE_FILE cxl
>+#include <trace/define_trace.h>
>
>--
>2.31.1
>

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