From patchwork Tue Sep 12 12:44:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 13381576 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D41F8F41 for ; Tue, 12 Sep 2023 12:45:24 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9CC110D8; Tue, 12 Sep 2023 05:45:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1694522724; x=1726058724; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=fP06kTzAN8WOEYJEVv+7hMOrn0c51DQEva6ses5OiO4=; b=mSVLddfoR1X5CRBONCywrFJBzIJQRd7/H2DPJsCOKWUqQOd0bBc4SxXu 46kGfZVjLsk4GDfPdO4aLrLlYrgY6oj5wrRPhiTGjKW6wRwV8jKrhSW+X MDnTO1RRz06fpH4HYiUdrfsato2PxUvBbf0JPysI5bIoxtTsS1/MOpGGV +BWx2LSpMS6BimRPmrkHnRt4bnOx6Q/YjKwOFvXeXNkbAHW1pgcLx6ozt Vlf6I4Wi8NR1/eybfyGq3VunQ1FPghiZtsvbe17AHdOxf1SCUdSRRjSXM hjJA8K/hAFufqauJKjHvQ4OODXJXq96b5tM0BWSGsTFlIuRDBZFpOefGs w==; X-IronPort-AV: E=McAfee;i="6600,9927,10831"; a="358638834" X-IronPort-AV: E=Sophos;i="6.02,139,1688454000"; d="scan'208";a="358638834" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Sep 2023 05:45:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10831"; a="867352818" X-IronPort-AV: E=Sophos;i="6.02,139,1688454000"; d="scan'208";a="867352818" Received: from srosalim-mobl1.ger.corp.intel.com (HELO tkristo-desk.intel.com) ([10.251.217.51]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Sep 2023 05:45:18 -0700 From: Tero Kristo To: x86@kernel.org, tglx@linutronix.de, bp@alien8.de, dave.hansen@linux.intel.com Cc: irogers@google.com, mark.rutland@arm.com, linux-perf-users@vger.kernel.org, hpa@zytor.com, mingo@redhat.com, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, acme@kernel.org, peterz@infradead.org, alexander.shishkin@linux.intel.com, adrian.hunter@intel.com, namhyung@kernel.org, jolsa@kernel.org, Kan Liang Subject: [RESEND PATCH 1/2] perf/x86/cstate: Allow reading the package statistics from local CPU Date: Tue, 12 Sep 2023 15:44:31 +0300 Message-Id: <20230912124432.3616761-2-tero.kristo@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230912124432.3616761-1-tero.kristo@linux.intel.com> References: <20230912124432.3616761-1-tero.kristo@linux.intel.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The MSR registers for reading the package residency counters are available on every CPU of the package. To avoid doing unnecessary SMP calls to read the values for these from the various CPUs inside a package, allow reading them from any CPU of the package. Signed-off-by: Tero Kristo Suggested-by: Kan Liang --- arch/x86/events/intel/cstate.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events/intel/cstate.c index 96fffb2d521d..cbeb6d2bf5b4 100644 --- a/arch/x86/events/intel/cstate.c +++ b/arch/x86/events/intel/cstate.c @@ -336,6 +336,9 @@ static int cstate_pmu_event_init(struct perf_event *event) cfg = array_index_nospec((unsigned long)cfg, PERF_CSTATE_PKG_EVENT_MAX); if (!(pkg_msr_mask & (1 << cfg))) return -EINVAL; + + event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG; + event->hw.event_base = pkg_msr[cfg].msr; cpu = cpumask_any_and(&cstate_pkg_cpu_mask, topology_die_cpumask(event->cpu));