Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 24 May 2023 15:18:17 -0700
In-Reply-To: <20230524221831.1741381-1-irogers@google.com>
Message-Id: <20230524221831.1741381-22-irogers@google.com>
Mime-Version: 1.0
References: <20230524221831.1741381-1-irogers@google.com>
Subject: [PATCH v3 21/35] perf header: Avoid hybrid PMU list in write_pmu_caps
From:   Ian Rogers <irogers@google.com>
To:     Suzuki K Poulose <suzuki.poulose@arm.com>,
        Mike Leach <mike.leach@linaro.org>,
        Leo Yan <leo.yan@linaro.org>,
        John Garry <john.g.garry@oracle.com>,
        Will Deacon <will@kernel.org>,
        James Clark <james.clark@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Ian Rogers <irogers@google.com>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Kajol Jain <kjain@linux.ibm.com>,
        Jing Zhang <renyu.zj@linux.alibaba.com>,
        Kan Liang <kan.liang@linux.intel.com>,
        Zhengjun Xing <zhengjun.xing@linux.intel.com>,
        Ravi Bangoria <ravi.bangoria@amd.com>,
        Madhavan Srinivasan <maddy@linux.ibm.com>,
        Athira Rajeev <atrajeev@linux.vnet.ibm.com>,
        Ming Wang <wangming01@loongson.cn>,
        Huacai Chen <chenhuacai@kernel.org>,
        Sandipan Das <sandipan.das@amd.com>,
        Dmitrii Dolgov <9erthalion6@gmail.com>,
        Sean Christopherson <seanjc@google.com>,
        Ali Saidi <alisaidi@amazon.com>, Rob Herring <robh@kernel.org>,
        Thomas Richter <tmricht@linux.ibm.com>,
        Kang Minchul <tegongkang@gmail.com>,
        linux-kernel@vger.kernel.org, coresight@lists.linaro.org,
        linux-arm-kernel@lists.infradead.org,
        linux-perf-users@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Avoid perf_pmu__for_each_hybrid_pmu by iterating all PMUs are dumping
the core ones. This will eventually allow removal of the hybrid PMU
list.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/header.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 276870221ce0..e24cc8f316cd 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -51,7 +51,6 @@
 #include "bpf-event.h"
 #include "bpf-utils.h"
 #include "clockid.h"
-#include "pmu-hybrid.h"
 
 #include <linux/ctype.h>
 #include <internal/lib.h>
@@ -1589,17 +1588,21 @@ static int write_pmu_caps(struct feat_fd *ff,
 	 * Write hybrid pmu caps first to maintain compatibility with
 	 * older perf tool.
 	 */
-	pmu = NULL;
-	perf_pmu__for_each_hybrid_pmu(pmu) {
-		ret = __write_pmu_caps(ff, pmu, true);
-		if (ret < 0)
-			return ret;
+	if (perf_pmu__has_hybrid()) {
+		pmu = NULL;
+		while ((pmu = perf_pmu__scan(pmu))) {
+			if (!pmu->is_core)
+				continue;
+
+			ret = __write_pmu_caps(ff, pmu, true);
+			if (ret < 0)
+				return ret;
+		}
 	}
 
 	pmu = NULL;
 	while ((pmu = perf_pmu__scan(pmu))) {
-		if (!pmu->name || !strcmp(pmu->name, "cpu") ||
-		    !pmu->nr_caps || perf_pmu__is_hybrid(pmu->name))
+		if (pmu->is_core || !pmu->nr_caps)
 			continue;
 
 		ret = __write_pmu_caps(ff, pmu, true);
-- 
2.40.1.698.g37aff9b760-goog