x64: cpu_detect: Add detection of waitpkg instructions

waitpkg introduces 3 instructions, UMONITOR, UMWAIT and TPAUSE.
4 years ago · 95adf299e4
2 changed files with 2 additions and 0 deletions
--- a/src/common/x64/cpu_detect.cpp
+++ b/src/common/x64/cpu_detect.cpp
@ -144,6 +144,7 @@ static CPUCaps Detect() {
            caps.bmi2 = Common::Bit<8>(cpu_id[1]);
            caps.sha = Common::Bit<29>(cpu_id[1]);

+            caps.waitpkg = Common::Bit<5>(cpu_id[2]);
            caps.gfni = Common::Bit<8>(cpu_id[2]);

            __cpuidex(cpu_id, 0x00000007, 0x00000001);
--- a/src/common/x64/cpu_detect.h
+++ b/src/common/x64/cpu_detect.h
@ -67,6 +67,7 @@ struct CPUCaps {
    bool pclmulqdq : 1;
    bool popcnt : 1;
    bool sha : 1;
+    bool waitpkg : 1;
 };

 /**