RE: [PATCH v4 1/6] cxl/events: Update Common Event Record to CXL spec rev 3.1

[Shiju Jose]

>-----Original Message-----
>From: Fan Ni <nifan.cxl@xxxxxxxxx>
>Sent: 26 November 2024 17:27
>To: Shiju Jose <shiju.jose@xxxxxxxxxx>
>Cc: dave.jiang@xxxxxxxxx; dan.j.williams@xxxxxxxxx; Jonathan Cameron
><jonathan.cameron@xxxxxxxxxx>; alison.schofield@xxxxxxxxx;
>nifan.cxl@xxxxxxxxx; vishal.l.verma@xxxxxxxxx; ira.weiny@xxxxxxxxx;
>dave@xxxxxxxxxxxx; linux-cxl@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
>Linuxarm <linuxarm@xxxxxxxxxx>; tanxiaofei <tanxiaofei@xxxxxxxxxx>;
>Zengtao (B) <prime.zeng@xxxxxxxxxxxxx>
>Subject: Re: [PATCH v4 1/6] cxl/events: Update Common Event Record to CXL
>spec rev 3.1
>
>On Wed, Nov 20, 2024 at 09:37:40AM +0000, shiju.jose@xxxxxxxxxx wrote:
>> From: Shiju Jose <shiju.jose@xxxxxxxxxx>
>>
>> CXL spec 3.1 section 8.2.9.2.1 Table 8-42, Common Event Record format
>> has updated with Maintenance Operation Subclass information.
>The table reference is incorrect, should be Table 8-43 based on spec r3.1, v1.0,
>Auguest 7, 2023.
>
Hi Fan, 

Thanks for reviewing.  Will fix.

>Other than that,
>
>
>Reviewed-by: Fan Ni <fan.ni@xxxxxxxxxxx>
>
>>
>> Add updates for the above spec change in the CXL events record and CXL
>> common trace event implementations.
>>
>> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
>> Reviewed-by: Davidlohr Bueso <dave@xxxxxxxxxxxx>
>> Signed-off-by: Shiju Jose <shiju.jose@xxxxxxxxxx>
>> ---
>>  drivers/cxl/core/trace.h | 13 +++++++++----
>>  include/cxl/event.h      |  3 ++-
>>  2 files changed, 11 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h index
>> 8389a94adb1a..7305974e2301 100644
>> --- a/drivers/cxl/core/trace.h
>> +++ b/drivers/cxl/core/trace.h
>> @@ -166,11 +166,13 @@ TRACE_EVENT(cxl_overflow,
>>  #define CXL_EVENT_RECORD_FLAG_MAINT_NEEDED	BIT(3)
>>  #define CXL_EVENT_RECORD_FLAG_PERF_DEGRADED	BIT(4)
>>  #define CXL_EVENT_RECORD_FLAG_HW_REPLACE	BIT(5)
>> +#define CXL_EVENT_RECORD_FLAG_MAINT_OP_SUB_CLASS_VALID	BIT(6)
>>  #define show_hdr_flags(flags)	__print_flags(flags, " | ",
>		   \
>>  	{ CXL_EVENT_RECORD_FLAG_PERMANENT,
>	"PERMANENT_CONDITION"		}, \
>>  	{ CXL_EVENT_RECORD_FLAG_MAINT_NEEDED,
>	"MAINTENANCE_NEEDED"		}, \
>>  	{ CXL_EVENT_RECORD_FLAG_PERF_DEGRADED,
>	"PERFORMANCE_DEGRADED"		}, \
>> -	{ CXL_EVENT_RECORD_FLAG_HW_REPLACE,
>	"HARDWARE_REPLACEMENT_NEEDED"	}  \
>> +	{ CXL_EVENT_RECORD_FLAG_HW_REPLACE,
>	"HARDWARE_REPLACEMENT_NEEDED"	},  \
>> +	{ CXL_EVENT_RECORD_FLAG_MAINT_OP_SUB_CLASS_VALID,
>	"MAINT_OP_SUB_CLASS_VALID" }	\
>>  )
>>
>>  /*
>> @@ -197,7 +199,8 @@ TRACE_EVENT(cxl_overflow,
>>  	__field(u16, hdr_related_handle)			\
>>  	__field(u64, hdr_timestamp)				\
>>  	__field(u8, hdr_length)					\
>> -	__field(u8, hdr_maint_op_class)
>> +	__field(u8, hdr_maint_op_class)				\
>> +	__field(u8, hdr_maint_op_sub_class)
>>
>>  #define CXL_EVT_TP_fast_assign(cxlmd, l, hdr)
>		\
>>  	__assign_str(memdev);				\
>> @@ -209,17 +212,19 @@ TRACE_EVENT(cxl_overflow,
>>  	__entry->hdr_handle = le16_to_cpu((hdr).handle);
>	\
>>  	__entry->hdr_related_handle = le16_to_cpu((hdr).related_handle);
>	\
>>  	__entry->hdr_timestamp = le64_to_cpu((hdr).timestamp);
>		\
>> -	__entry->hdr_maint_op_class = (hdr).maint_op_class
>> +	__entry->hdr_maint_op_class = (hdr).maint_op_class;
>	\
>> +	__entry->hdr_maint_op_sub_class = (hdr).maint_op_sub_class
>>
>>  #define CXL_EVT_TP_printk(fmt, ...) \
>>  	TP_printk("memdev=%s host=%s serial=%lld log=%s : time=%llu
>uuid=%pUb "	\
>>  		"len=%d flags='%s' handle=%x related_handle=%x "
>	\
>> -		"maint_op_class=%u : " fmt,
>	\
>> +		"maint_op_class=%u maint_op_sub_class=%u : " fmt,
>	\
>>  		__get_str(memdev), __get_str(host), __entry->serial,
>	\
>>  		cxl_event_log_type_str(__entry->log),
>	\
>>  		__entry->hdr_timestamp, &__entry->hdr_uuid, __entry-
>>hdr_length,\
>>  		show_hdr_flags(__entry->hdr_flags), __entry->hdr_handle,
>	\
>>  		__entry->hdr_related_handle, __entry->hdr_maint_op_class,
>	\
>> +		__entry->hdr_maint_op_sub_class,	\
>>  		##__VA_ARGS__)
>>
>>  TRACE_EVENT(cxl_generic_event,
>> diff --git a/include/cxl/event.h b/include/cxl/event.h index
>> 0bea1afbd747..e1d485ad376b 100644
>> --- a/include/cxl/event.h
>> +++ b/include/cxl/event.h
>> @@ -18,7 +18,8 @@ struct cxl_event_record_hdr {
>>  	__le16 related_handle;
>>  	__le64 timestamp;
>>  	u8 maint_op_class;
>> -	u8 reserved[15];
>> +	u8 maint_op_sub_class;
>> +	u8 reserved[14];
>>  } __packed;
>>
>>  struct cxl_event_media_hdr {
>> --
>> 2.43.0
>>
>
>--
>Fan Ni (From gmail)

Thanks,
Shiju