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Thu, 25 Sep 2025 06:36:32 -0700 (PDT) Message-ID: <4d5bf14a-0465-47b2-88c3-1bf85b008707@linaro.org> Date: Thu, 25 Sep 2025 14:36:30 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 08/12] perf: Add perf_event_attr::config4 To: Will Deacon , Peter Zijlstra , Arnaldo Carvalho de Melo Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, Ingo Molnar , Namhyung Kim , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Leo Yan , Anshuman Khandual , Mark Rutland , Jonathan Corbet , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas References: <20250901-james-perf-feat_spe_eft-v8-0-2e2738f24559@linaro.org> <20250901-james-perf-feat_spe_eft-v8-8-2e2738f24559@linaro.org> Content-Language: en-US From: James Clark In-Reply-To: <20250901-james-perf-feat_spe_eft-v8-8-2e2738f24559@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 01/09/2025 1:40 pm, James Clark wrote: > Arm FEAT_SPE_FDS adds the ability to filter on the data source of a > packet using another 64-bits of event filtering control. As the existing > perf_event_attr::configN fields are all used up for SPE PMU, an > additional field is needed. Add a new 'config4' field. > > Reviewed-by: Leo Yan > Tested-by: Leo Yan > Reviewed-by: Ian Rogers > Signed-off-by: James Clark > --- > include/uapi/linux/perf_event.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h > index 78a362b80027..0d0ed85ad8cb 100644 > --- a/include/uapi/linux/perf_event.h > +++ b/include/uapi/linux/perf_event.h > @@ -382,6 +382,7 @@ enum perf_event_read_format { > #define PERF_ATTR_SIZE_VER6 120 /* Add: aux_sample_size */ > #define PERF_ATTR_SIZE_VER7 128 /* Add: sig_data */ > #define PERF_ATTR_SIZE_VER8 136 /* Add: config3 */ > +#define PERF_ATTR_SIZE_VER9 144 /* add: config4 */ > > /* > * 'struct perf_event_attr' contains various attributes that define > @@ -543,6 +544,7 @@ struct perf_event_attr { > __u64 sig_data; > > __u64 config3; /* extension of config2 */ > + __u64 config4; /* extension of config3 */ > }; > > /* > Hi Peter, Did you get a chance to look at this? Patches 1-7 have been taken, just waiting on an ack to take this config4 change before taking the remaining ones. Thanks James