linux-kernel - [PATCH v1 0/4] Enabling Ring 3 MONITOR/MWAIT feature for Knights Landing

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Date:   Wed, 12 Oct 2016 12:13:06 +0200
From:   Grzegorz Andrejczuk <grzegorz.andrejczuk@...el.com>
To:     tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org
Cc:     bp@...e.de, dave.hansen@...ux.intel.com,
        linux-kernel@...r.kernel.org, lukasz.daniluk@...el.com,
        james.h.cownie@...el.com,
        Grzegorz Andrejczuk <grzegorz.andrejczuk@...el.com>
Subject: [PATCH v1 0/4] Enabling Ring 3 MONITOR/MWAIT feature for Knights Landing

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

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/cpufeature.h        |  6 ++++--
 arch/x86/include/asm/cpufeatures.h       |  6 +++++-
 arch/x86/include/asm/disabled-features.h |  3 ++-
 arch/x86/include/asm/elf.h               |  7 +++++++
 arch/x86/include/asm/msr-index.h         |  5 +++++
 arch/x86/include/asm/required-features.h |  3 ++-
 arch/x86/include/uapi/asm/hwcap.h        |  7 +++++++
 arch/x86/kernel/cpu/common.c             |  6 ++++++
 arch/x86/kernel/cpu/intel.c              | 27 +++++++++++++++++++++++++++
 9 files changed, 65 insertions(+), 5 deletions(-)
 create mode 100644 arch/x86/include/uapi/asm/hwcap.h

-- 
2.5.1