From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932095AbcGLWFH (ORCPT ); Tue, 12 Jul 2016 18:05:07 -0400 Received: from mga02.intel.com ([134.134.136.20]:43668 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752462AbcGLWDD (ORCPT ); Tue, 12 Jul 2016 18:03:03 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,353,1464678000"; d="scan'208";a="138071706" From: "Fenghua Yu" To: "Thomas Gleixner" , "Ingo Molnar" , "H. Peter Anvin" , "Tony Luck" , "Tejun Heo" , "Borislav Petkov" , "Stephane Eranian" , "Peter Zijlstra" , "Marcelo Tosatti" , "David Carrillo-Cisneros" , "Ravi V Shankar" , "Vikas Shivappa" , "Sai Prakhya" Cc: "linux-kernel" , "x86" , "Fenghua Yu" Subject: [PATCH 12/32] x86/intel_rdt: Hot cpu update for code data prioritization Date: Tue, 12 Jul 2016 18:02:45 -0700 Message-Id: <1468371785-53231-13-git-send-email-fenghua.yu@intel.com> X-Mailer: git-send-email 1.8.0.1 In-Reply-To: <1468371785-53231-1-git-send-email-fenghua.yu@intel.com> References: <1468371785-53231-1-git-send-email-fenghua.yu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vikas Shivappa Updates hot cpu notification handling for code data prioritization(cdp). The capacity bitmask(cbm) is global for both data and instruction and we need to update the new online package with all the cbms by writing to the IA32_L3_QOS_n MSRs. Signed-off-by: Vikas Shivappa Signed-off-by: Fenghua Yu Reviewed-by: Tony Luck --- arch/x86/kernel/cpu/intel_rdt.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index 7a03671..057aef1 100644 --- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -330,6 +330,26 @@ static inline bool rdt_cpumask_update(int cpu) return false; } +static void cbm_update_msr(u32 index) +{ + struct rdt_remote_data info; + int dindex; + + dindex = DCBM_TABLE_INDEX(index); + if (cctable[dindex].clos_refcnt) { + + info.msr = CBM_FROM_INDEX(dindex); + info.val = cctable[dindex].l3_cbm; + msr_cpu_update((void *) &info); + + if (cdp_enabled) { + info.msr = __ICBM_MSR_INDEX(index); + info.val = cctable[dindex + 1].l3_cbm; + msr_cpu_update((void *) &info); + } + } +} + /* * cbm_update_msrs() - Updates all the existing IA32_L3_MASK_n MSRs * which are one per CLOSid on the current package. @@ -337,15 +357,10 @@ static inline bool rdt_cpumask_update(int cpu) static void cbm_update_msrs(void *dummy) { int maxid = cconfig.max_closid; - struct rdt_remote_data info; unsigned int i; for (i = 0; i < maxid; i++) { - if (cctable[i].clos_refcnt) { - info.msr = CBM_FROM_INDEX(i); - info.val = cctable[i].l3_cbm; - msr_cpu_update((void *) &info); - } + cbm_update_msr(i); } } -- 2.5.0