linux-kernel - Re: [PATCH 1/2] coresight: etm4x: Add support for Qualcomm SC7180 SoC

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Date:   Mon, 23 Mar 2020 17:02:39 +0530
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Suzuki K Poulose <suzuki.poulose@....com>
Cc:     mathieu.poirier@...aro.org, bjorn.andersson@...aro.org,
        leo.yan@...aro.org, devicetree@...r.kernel.org, robh+dt@...nel.org,
        agross@...nel.org, david.brown@...aro.org, mark.rutland@....com,
        swboyd@...omium.org, rnayak@...eaurora.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/2] coresight: etm4x: Add support for Qualcomm SC7180 SoC

Hi Suzuki,

On 2020-03-23 15:25, Suzuki K Poulose wrote:
> On 03/20/2020 07:44 AM, Sai Prakash Ranjan wrote:
>> Add ETM Peripheral IDs for Qualcomm SC7180 SoC. It has
>> 2 big CPU cores based on Cortex-A76 and 6 LITTLE CPU
>> cores based on Cortex-A55.
>> 
>> Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
>> ---
>>   drivers/hwtracing/coresight/coresight-etm4x.c | 2 ++
>>   1 file changed, 2 insertions(+)
>> 
>> diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c 
>> b/drivers/hwtracing/coresight/coresight-etm4x.c
>> index a90d757f7043..a153a65c4c5b 100644
>> --- a/drivers/hwtracing/coresight/coresight-etm4x.c
>> +++ b/drivers/hwtracing/coresight/coresight-etm4x.c
>> @@ -1556,6 +1556,8 @@ static const struct amba_id etm4_ids[] = {
>>   	CS_AMBA_UCI_ID(0x000f0211, uci_id_etm4),/* Qualcomm Kryo */
>>   	CS_AMBA_ID(0x000bb802),			/* Qualcomm Kryo 385 Cortex-A55 */
>>   	CS_AMBA_ID(0x000bb803),			/* Qualcomm Kryo 385 Cortex-A75 */
>> +	CS_AMBA_ID(0x000bb805),			/* Qualcomm Kryo 4XX Cortex-A55 */
>> +	CS_AMBA_ID(0x000bb804),			/* Qualcomm Kryo 4XX Cortex-A76 */
> 
> Does the DEVARCH indicate that it is an ETMv4 ? (It should !) Please
> could we enforce the UCI_ID check for these components ? The
> moment you add CTI components to your board this could conflict with
> them unless we check the UCI_ID for ETMv4.
> 

Yes I got these IDs through devarch and it does indicate that it is 
ETMv4.2.

devname=7040000.etm dev->type=0x13 devarch=0x47724a13
devname=7140000.etm dev->type=0x13 devarch=0x47724a13
devname=7240000.etm dev->type=0x13 devarch=0x47724a13
devname=7340000.etm dev->type=0x13 devarch=0x47724a13
devname=7440000.etm dev->type=0x13 devarch=0x47724a13
devname=7540000.etm dev->type=0x13 devarch=0x47724a13
devname=7640000.etm dev->type=0x13 devarch=0x47724a13
devname=7740000.etm dev->type=0x13 devarch=0x47724a13

I will add the UCI_ID as you suggested in next version.

Thanks,
Sai
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