From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753448AbcD0UBf (ORCPT ); Wed, 27 Apr 2016 16:01:35 -0400 Received: from mga01.intel.com ([192.55.52.88]:30915 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752811AbcD0UBe (ORCPT ); Wed, 27 Apr 2016 16:01:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,543,1455004800"; d="scan'208";a="967871945" From: Andi Kleen To: acme@kernel.org Cc: peterz@infradead.org, jolsa@kernel.org, linux-kernel@vger.kernel.org, Andi Kleen Subject: [PATCH 04/11] x86, perf: Use new ht_on flag in HT leak workaround Date: Wed, 27 Apr 2016 13:00:44 -0700 Message-Id: <1461787251-6702-5-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1461787251-6702-1-git-send-email-andi@firstfloor.org> References: <1461787251-6702-1-git-send-email-andi@firstfloor.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen Now that we have a convenient ht_on flag in x86_pmu use it to detect the HT workarounds for older CPUs. Signed-off-by: Andi Kleen --- arch/x86/events/intel/core.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 2af56c268b53..4efe9347bb82 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -4012,16 +4012,14 @@ __init int intel_pmu_init(void) */ static __init int fixup_ht_bug(void) { - int cpu = smp_processor_id(); - int w, c; + int c; /* * problem not present on this CPU model, nothing to do */ if (!(x86_pmu.flags & PMU_FL_EXCL_ENABLED)) return 0; - w = cpumask_weight(topology_sibling_cpumask(cpu)); - if (w > 1) { + if (x86_pmu.ht_on) { pr_info("PMU erratum BJ122, BV98, HSD29 worked around, HT is on\n"); return 0; } -- 2.5.5