linux-kernel - [PATCH 3/5] perf tools: Add helper x86__is_intel

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Message-Id: <20250805004633.135904-4-dapeng1.mi@linux.intel.com>
Date: Tue,  5 Aug 2025 08:46:31 +0800
From: Dapeng Mi <dapeng1.mi@...ux.intel.com>
To: Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Kevin Tian <kevin.tian@...el.com>,
	Dapeng Mi <dapeng1.mi@...el.com>,
	Dapeng Mi <dapeng1.mi@...ux.intel.com>
Subject: [PATCH 3/5] perf tools: Add helper x86__is_intel_cpu()

Add helper x86__is_intel_cpu() to indicate if it's a x86 intel platform.

Signed-off-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
---
 tools/perf/util/env.c | 22 ++++++++++++++++++++++
 tools/perf/util/env.h |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index c8c248754621..f1626d2032cd 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -802,3 +802,25 @@ bool x86__is_amd_cpu(void)
 
 	return is_amd;
 }
+
+bool perf_env__is_x86_intel_cpu(struct perf_env *env)
+{
+	static int is_intel; /* 0: Uninitialized, 1: Yes, -1: No */
+
+	if (is_intel == 0)
+		is_intel = env->cpuid && strstarts(env->cpuid, "GenuineIntel") ? 1 : -1;
+
+	return is_intel >= 1 ? true : false;
+}
+
+bool x86__is_intel_cpu(void)
+{
+	struct perf_env env = { .total_mem = 0, };
+	bool is_intel;
+
+	perf_env__cpuid(&env);
+	is_intel = perf_env__is_x86_intel_cpu(&env);
+	perf_env__exit(&env);
+
+	return is_intel;
+}
diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
index e00179787a34..9977b85523a8 100644
--- a/tools/perf/util/env.h
+++ b/tools/perf/util/env.h
@@ -201,5 +201,7 @@ void perf_env__find_br_cntr_info(struct perf_env *env,
 
 bool x86__is_amd_cpu(void);
 bool perf_env__is_x86_amd_cpu(struct perf_env *env);
+bool x86__is_intel_cpu(void);
+bool perf_env__is_x86_intel_cpu(struct perf_env *env);
 
 #endif /* __PERF_ENV_H */
-- 
2.34.1