How to enable ETM/ETB on Qualcom chipset

How to enable ETM/ETB on Qualcom chipset

[Lijun Chen]

Hi,

Anybody used ETM/ETB on Qualcomm, e.g. 8974? Which CONFIGs need to be 
turned on? And how to decode the buffer afterwards?

Thanks,
Lijun

How to enable ETM/ETB on Qualcom chipset

[Mathieu Poirier]

HW assisted tracing is currently not supported upstream on a core like
the 8974.  There is currently a lot of work being done to change that
but things aren't finished yet.

Support for the 8974 can be found here [1] and here [2] as work in progress.

For a free trace decoding "ptm2human" does a pretty good job.  Tools
like DS-5 and Trace32 will work flawlessly.

Mathieu

[1]. https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/log/?h=LNX.LA.3.7.1_rb3.2
[2]. https://git.linaro.org/kernel/coresight.git

On 15 September 2014 09:49, Lijun Chen <ljchen999@gmail.com> wrote:
> Hi,
>
> Anybody used ETM/ETB on Qualcomm, e.g. 8974? Which CONFIGs need to be
> turned on? And how to decode the buffer afterwards?
>
> Thanks,
> Lijun
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

How to enable ETM/ETB on Qualcom chipset

[Lijun Chen]

Resent with plain text mode.

Thanks, Mathieu.

I will keep monitoring the following links. BTW, is it going to be
supported in AOSP L-series?

Regards,
Lijun

On Thu, Sep 18, 2014 at 8:37 PM, Mathieu Poirier
<mathieu.poirier@linaro.org> wrote:
> HW assisted tracing is currently not supported upstream on a core like
> the 8974.  There is currently a lot of work being done to change that
> but things aren't finished yet.
>
> Support for the 8974 can be found here [1] and here [2] as work in progress.
>
> For a free trace decoding "ptm2human" does a pretty good job.  Tools
> like DS-5 and Trace32 will work flawlessly.
>
> Mathieu
>
> [1]. https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/log/?h=LNX.LA.3.7.1_rb3.2
> [2]. https://git.linaro.org/kernel/coresight.git
>
> On 15 September 2014 09:49, Lijun Chen <ljchen999@gmail.com> wrote:
>> Hi,
>>
>> Anybody used ETM/ETB on Qualcomm, e.g. 8974? Which CONFIGs need to be
>> turned on? And how to decode the buffer afterwards?
>>
>> Thanks,
>> Lijun
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

How to enable ETM/ETB on Qualcom chipset

[Mathieu Poirier]

On 19 September 2014 14:11, Lijun Chen <ljchen999@gmail.com> wrote:
> Resent with plain text mode.
>
> Thanks, Mathieu.
>
> I will keep monitoring the following links. BTW, is it going to be
> supported in AOSP L-series?

All the work we are doing is targeting the mainline kernel.  When
things do go mainline you can use Linaro's LSK if you need an Android
kernel.

Mathieu

>
> Regards,
> Lijun
>
> On Thu, Sep 18, 2014 at 8:37 PM, Mathieu Poirier
> <mathieu.poirier@linaro.org> wrote:
>> HW assisted tracing is currently not supported upstream on a core like
>> the 8974.  There is currently a lot of work being done to change that
>> but things aren't finished yet.
>>
>> Support for the 8974 can be found here [1] and here [2] as work in progress.
>>
>> For a free trace decoding "ptm2human" does a pretty good job.  Tools
>> like DS-5 and Trace32 will work flawlessly.
>>
>> Mathieu
>>
>> [1]. https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/log/?h=LNX.LA.3.7.1_rb3.2
>> [2]. https://git.linaro.org/kernel/coresight.git
>>
>> On 15 September 2014 09:49, Lijun Chen <ljchen999@gmail.com> wrote:
>>> Hi,
>>>
>>> Anybody used ETM/ETB on Qualcomm, e.g. 8974? Which CONFIGs need to be
>>> turned on? And how to decode the buffer afterwards?
>>>
>>> Thanks,
>>> Lijun
>>>
>>>
>>> _______________________________________________
>>> linux-arm-kernel mailing list
>>> linux-arm-kernel at lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel