From d2cfe25b07906f36c688ccacde30e3dc50123e8f Mon Sep 17 00:00:00 2001
From: Morph <39850852+Morph1984@users.noreply.github.com>
Date: Tue, 21 Mar 2023 21:13:03 -0400
Subject: [PATCH] x64: cpu_detect: Add detection of waitpkg instructions

waitpkg introduces 3 instructions, UMONITOR, UMWAIT and TPAUSE.
---
 src/common/x64/cpu_detect.cpp | 1 +
 src/common/x64/cpu_detect.h   | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/common/x64/cpu_detect.cpp b/src/common/x64/cpu_detect.cpp
index e54383a4a..72ed6e96c 100644
--- 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);
diff --git a/src/common/x64/cpu_detect.h b/src/common/x64/cpu_detect.h
index ca8db19d6..8253944d6 100644
--- 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;
 };
 
 /**