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From:   Stephane Eranian <eranian@google.com>
Date:   Mon, 31 Jan 2022 23:28:13 -0800
Message-ID: <CABPqkBQBNyXQrdRGzzK-oN6bty6nLC3UfbDfkqGiE8wFKZFCSw@mail.gmail.com>
Subject: Re: [PATCH v5 07/13] perf/x86/amd: make Zen3 branch sampling opt-in
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     linux-kernel@vger.kernel.org, kim.phillips@amd.com,
        acme@redhat.com, jolsa@redhat.com, songliubraving@fb.com
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On Thu, Jan 27, 2022 at 4:51 AM Peter Zijlstra <peterz@infradead.org> wrote:
>
> 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 ?!

Ok, I will fix that in V6.
Thanks.