linux-kernel - Re: [PATCH v5 0/4] Prefer sysfs/JSON events also when no PMU is provided

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Message-ID: <173825913284.2069353.1023049431738913294.b4-ty@kernel.org>
Date: Thu, 30 Jan 2025 09:46:11 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	James Clark <james.clark@...aro.org>,
	Ze Gao <zegao2021@...il.com>,
	Weilin Wang <weilin.wang@...el.com>,
	Dominique Martinet <asmadeus@...ewreck.org>,
	Jean-Philippe Romain <jean-philippe.romain@...s.st.com>,
	Junhao He <hejunhao3@...wei.com>,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org,
	Aditya Bodkhe <Aditya.Bodkhe1@....com>,
	Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH v5 0/4] Prefer sysfs/JSON events also when no PMU is provided

On Thu, 09 Jan 2025 14:21:05 -0800, Ian Rogers wrote:
> At the RISC-V summit the topic of avoiding event data being in the
> RISC-V PMU kernel driver came up. There is a preference for sysfs/JSON
> events being the priority when no PMU is provided so that legacy
> events maybe supported via json. Originally Mark Rutland also
> expressed at LPC 2023 that doing this would resolve bugs on ARM Apple
> M? processors, but James Clark more recently tested this and believes
> the driver issues there may not have existed or have been resolved. In
> any case, it is inconsistent that with a PMU event names avoid legacy
> encodings, but when wildcarding PMUs (ie without a PMU with the event
> name) the legacy encodings have priority.
> 
> [...]
Applied patch 1 and 2 to perf-tools-next, thanks!

Best regards,
Namhyung