linux-kernel - Re: [PATCH 5/9] perf utils: add support for arch standard events

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Date:   Thu, 8 Feb 2018 14:55:49 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     John Garry <john.garry@...wei.com>
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, namhyung@...nel.org,
        ak@...ux.intel.com, wcohen@...hat.com, will.deacon@....com,
        ganapatrao.kulkarni@...ium.com, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com, zhangshaokun@...ilicon.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 5/9] perf utils: add support for arch standard events

On Wed, Feb 07, 2018 at 01:45:00AM +0800, John Garry wrote:
> For some architectures (like arm), there are architecture-
> defined events. Sometimes these events may be "recommended"
> according to the architecture standard, in that the
> implementer is free ignore the "recommendation" and create
> its custom event.
> 
> This patch adds support for parsing standard events from
> arch-defined JSONs, and fixing up vendor events when they
> have implemented these events as standard.
> 
> Support is also ensured that the vendor may implement their
> own custom events.
> 
> A new step is added to the pmu events parsing to fix up the
> vendor events with the arch-standard events.
> 
> The arch-defined JSONs must be placed in the arch root
> folder for preprocessing prior to tree JSON processing.
> 
> In the vendor JSON, to specify that the arch event is
> supported, the keyword "ArchStdEvent" should be used,
> like this:
> [
>     {
>         "ArchStdEvent": "0x41",
> 	"BriefDescription": "L1D cache access, write"
>     },
> ]
> 
> No other JSON objects are strictly required. However,
> for other objects added, these take precedence over
> architecture defined standard events, thus supporting
> separate events which have the same event code.
> 
> Signed-off-by: John Garry <john.garry@...wei.com>
> ---
>  tools/perf/pmu-events/Build     |   1 +
>  tools/perf/pmu-events/README    |   6 ++
>  tools/perf/pmu-events/jevents.c | 185 +++++++++++++++++++++++++++++++++++++---
>  3 files changed, 182 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build
> index 999a4e8..f9e8466 100644
> --- a/tools/perf/pmu-events/Build
> +++ b/tools/perf/pmu-events/Build
> @@ -1,5 +1,6 @@
>  hostprogs := jevents
>  
> +CHOSTFLAGS	= -I$(srctree)/tools/include

Ithink this could be just CHOSTFLAGS_jevents.o = -I$(srctree)/tools/include
it's just for the list.h right?

jirka