Messages in this thread | | | Date | Thu, 27 Jan 2022 13:51:45 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v5 07/13] perf/x86/amd: make Zen3 branch sampling opt-in |
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On Wed, Jan 26, 2022 at 03:34:48PM -0800, Stephane Eranian wrote: > This patch adds a kernel config option to make support > for AMD Zen3 Branch Sampling (BRS) an opt-in compile > time option. > > Signed-off-by: Stephane Eranian <eranian@google.com> > --- > arch/x86/events/Kconfig | 8 ++++++ > arch/x86/events/amd/Makefile | 3 ++- > arch/x86/events/perf_event.h | 49 ++++++++++++++++++++++++++++-------- > 3 files changed, 49 insertions(+), 11 deletions(-) > > diff --git a/arch/x86/events/Kconfig b/arch/x86/events/Kconfig > index d6cdfe631674..1dc002ef66da 100644 > --- a/arch/x86/events/Kconfig > +++ b/arch/x86/events/Kconfig > @@ -44,4 +44,12 @@ config PERF_EVENTS_AMD_UNCORE > > To compile this driver as a module, choose M here: the > module will be called 'amd-uncore'. > + > +config PERF_EVENTS_AMD_BRS > + depends on PERF_EVENTS && CPU_SUP_AMD > + tristate "AMD Zen3 Branch Sampling support"
tristate ?!
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