From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754636AbcJLMQm (ORCPT ); Wed, 12 Oct 2016 08:16:42 -0400 Received: from mga11.intel.com ([192.55.52.93]:42247 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754192AbcJLMQc (ORCPT ); Wed, 12 Oct 2016 08:16:32 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,482,1473145200"; d="scan'208";a="19261759" From: Grzegorz Andrejczuk To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org Cc: bp@suse.de, dave.hansen@linux.intel.com, linux-kernel@vger.kernel.org, lukasz.daniluk@intel.com, james.h.cownie@intel.com, Grzegorz Andrejczuk Subject: [PATCH v2 0/4] Enabling Ring 3 MONITOR/MWAIT feature for Knights Landing Date: Wed, 12 Oct 2016 14:16:21 +0200 Message-Id: <1476274585-21679-1-git-send-email-grzegorz.andrejczuk@intel.com> X-Mailer: git-send-email 2.5.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These patches enable Intel Xeon Phi x200 feature to use MONITOR/MWAIT instruction in ring 3 (userspace) Patches set MSR 0x140 for all logical CPUs. Then expose it as CPU feature and introduces elf HWCAP capability for x86. Reference: https://software.intel.com/en-us/blogs/2016/10/06/intel-xeon-phi-product-family-x200-knl-user-mode-ring-3-monitor-and-mwait v2: Check MSR before wrmsrl Shortened names Used Word 3 for feature init_scattered_cpuid_features() Fixed commit messages Grzegorz Andrejczuk (4): Add R3MWAIT register and bit to msr-info.h Add enabling of the R3 MWAIT during boot for KNL Add hwcap2 for x86 Add R3MWAIT to CPU features arch/x86/include/asm/cpufeatures.h | 2 ++ arch/x86/include/asm/elf.h | 7 +++++++ arch/x86/include/asm/msr-index.h | 5 +++++ arch/x86/include/uapi/asm/hwcap.h | 7 +++++++ arch/x86/kernel/cpu/common.c | 6 ++++++ arch/x86/kernel/cpu/intel.c | 27 +++++++++++++++++++++++++++ arch/x86/kernel/cpu/scattered.c | 5 +++++ 7 files changed, 59 insertions(+) create mode 100644 arch/x86/include/uapi/asm/hwcap.h -- 2.5.1