Re: [PATCH V13 - RESEND 06/10] arm64/perf: Enable branch stack events via FEAT_BRBE

[Anshuman Khandual]

On 7/12/23 00:56, Randy Dunlap wrote:
> Hi--
> 
> On 7/11/23 01:24, Anshuman Khandual wrote:
>> diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
>> index f4572a5cca72..7c8448051741 100644
>> --- a/drivers/perf/Kconfig
>> +++ b/drivers/perf/Kconfig
>> @@ -180,6 +180,17 @@ config ARM_SPE_PMU
>>  	  Extension, which provides periodic sampling of operations in
>>  	  the CPU pipeline and reports this via the perf AUX interface.
>>  
>> +config ARM64_BRBE
>> +	bool "Enable support for Branch Record Buffer Extension (BRBE)"
>> +	depends on PERF_EVENTS && ARM64 && ARM_PMU
>> +	default y
>> +	help
>> +	  Enable perf support for Branch Record Buffer Extension (BRBE) which
>> +	  records all branches taken in an execution path. This supports some
>> +	  branch types and privilege based filtering. It captured additional
> 
> preferably:
> 	                                                 captures

Agreed, will change.

> 
>> +	  relevant information such as cycle count, misprediction and branch
>> +	  type, branch privilege level etc.
>