Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 12 Jul 2023 08:12:44 +0530 | Subject | Re: [PATCH V13 - RESEND 06/10] arm64/perf: Enable branch stack events via FEAT_BRBE | From | Anshuman Khandual <> |
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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. >
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