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
