From 94cbae520a67635636e887f9d9d6dd0d1508be82 Mon Sep 17 00:00:00 2001
From: Matt DeVillier <matt.devillier@gmail.com>
Date: Wed, 26 Jul 2023 14:04:53 -0500
Subject: [PATCH] Revert "UefiCpuPkg: Solve that stack top address is not
 mapped in pagetable"

This reverts commit b1db09657546f4983a1ec18336b36212b5875c3f.

Commit breaks booting on AMD Zen platforms.

Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Change-Id: Id86c84dbca13d68bb6c9c28ec170dc6e9f1c9e56
---
 UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm | 1 -
 1 file changed, 1 deletion(-)

diff --git a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
index 40e80ffab4e7..de0e96306b32 100644
--- a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
+++ b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
@@ -314,7 +314,6 @@ MwaitCheckGeneric:
 MwaitLoopGeneric:
     cli
     mov        rax, rsp           ; Set Monitor Address
-    sub        eax, 8             ; To ensure the monitor address is in the page table
     xor        ecx, ecx           ; ecx = 0
     xor        edx, edx           ; edx = 0
     monitor