RE: [RFC PATCH 4/4] cxl/events: Updates for CXL Memory Module Event Record

[Shiju Jose]

>-----Original Message-----
>From: Jonathan Cameron <jonathan.cameron@xxxxxxxxxx>
>Sent: 17 October 2024 13:44
>To: Shiju Jose <shiju.jose@xxxxxxxxxx>
>Cc: dave.jiang@xxxxxxxxx; dan.j.williams@xxxxxxxxx; alison.schofield@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: [RFC PATCH 4/4] cxl/events: Updates for CXL Memory Module Event
>Record
>
>On Wed, 16 Oct 2024 17:33:49 +0100
><shiju.jose@xxxxxxxxxx> wrote:
>
>> From: Shiju Jose <shiju.jose@xxxxxxxxxx>
>>
>> CXL spec 3.1 section 8.2.9.2.1.3 Table 8-47, Memory Module Event
>> Record has updated with following new fields and new info for Device
>> Event Type and Device Health Information fields.
>> 1. Validity Flags
>> 2. Component Identifier
>> 3. Device Event Sub-Type
>>
>> Add updates for the above spec changes in the CXL events record and
>> CXL Memory Module trace event implementations.
>>
>> Signed-off-by: Shiju Jose <shiju.jose@xxxxxxxxxx>
>
>A few minor things inline, but with the event_sub_type naming feel free to add
>Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
>
>>
>>  	CXL_EVT_TP_printk("event_type='%s' health_status='%s'
>media_status='%s' " \
>>  		"as_life_used=%s as_dev_temp=%s as_cor_vol_err_cnt=%s " \
>>  		"as_cor_per_err_cnt=%s life_used=%u device_temp=%d " \
>> -		"dirty_shutdown_cnt=%u cor_vol_err_cnt=%u
>cor_per_err_cnt=%u",
>> +		"dirty_shutdown_cnt=%u cor_vol_err_cnt=%u
>cor_per_err_cnt=%u " \
>> +		"validity_flags='%s' comp_id=%s sub_type='%s'",
>>  		show_dev_evt_type(__entry->event_type),
>>  		show_health_status_flags(__entry->health_status),
>>  		show_media_status(__entry->media_status),
>> @@ -750,7 +782,11 @@ TRACE_EVENT(cxl_memory_module,
>>  		show_one_bit_status(CXL_DHI_AS_COR_PER_ERR_CNT(__entry-
>>add_status)),
>>  		__entry->life_used, __entry->device_temp,
>>  		__entry->dirty_shutdown_cnt, __entry->cor_vol_err_cnt,
>> -		__entry->cor_per_err_cnt
>> +		__entry->cor_per_err_cnt,
>> +		show_mem_module_valid_flags(__entry->validity_flags),
>> +		cxl_print_component_id(__entry->validity_flags,
>CXL_MMER_VALID_COMPONENT,
>> +
>CXL_MMER_VALID_COMPONENT_ID_FORMAT, __entry->comp_id),
>> +		show_dev_event_sub_type(__entry->sub_type)
>If we are going to reorganize for the other patches, why not move this next to
>the event type field?  There isn't a validity flag for this (0 means not specified) so
>fine to move it earlier I think.
Will do.
>>  	)
>>  );
>>
>> diff --git a/include/cxl/event.h b/include/cxl/event.h index
>> 7e98492c85df..18b7f96dea77 100644
>> --- a/include/cxl/event.h
>> +++ b/include/cxl/event.h
>> @@ -102,7 +102,10 @@ struct cxl_event_mem_module {
>>  	struct cxl_event_record_hdr hdr;
>>  	u8 event_type;
>>  	struct cxl_get_health_info info;
>> -	u8 reserved[0x3d];
>> +	u8 validity_flags[2];
>> +	u8 component_id[CXL_EVENT_GEN_MED_COMP_ID_SIZE];
>> +	u8 sub_type;
>maybe event_sub_type to match spec naming?
Will do.
>
>> +	u8 reserved[0x2a];
>>  } __packed;
>>
>>  union cxl_event {

Thanks,
Shiju