[PATCH v2 0/4] Enabling Ring 3 MONITOR/MWAIT feature for Knights Landing

[Grzegorz Andrejczuk]

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