[Qemu-devel] [PATCH 0/3] x86/cpu: Enable a few new cpu features

[Jingqi Liu]

Enable a few new cpu features including UMONITOR, UMWAIT, TPAUSE,
MOVDIRI and MOVDIR64B.

UMONITOR, UMWAIT, and TPAUSE are a set of user wait instructions.
MOVDIRI moves doubleword or quadword from register to memory through
direct store.
MOVDIR64B moves 64-bytes as direct-store with 64-bytes write atomicity.

The bits definition:
CPUID.(EAX=7,ECX=0):ECX[bit 05] WAITPKG
CPUID.(EAX=7,ECX=0):ECX[bit 27] MOVDIRI
CPUID.(EAX=7,ECX=0):ECX[bit 28] MOVDIR64B

The release document ref below link:
https://software.intel.com/sites/default/files/managed/c5/15/\
architecture-instruction-set-extensions-programming-reference.pdf

Jingqi Liu (3):
  x86/cpu: Enable UMONITOR/UMWAIT/TPAUSE cpu features
  x86/cpu: Enable MOVDIRI cpu feature
  x86/cpu: Enable MOVDIR64B cpu feature

 target/i386/cpu.c | 6 +++---
 target/i386/cpu.h | 3 +++
 2 files changed, 6 insertions(+), 3 deletions(-)

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1.8.3.1