UefiCpuPkg/PiSmmCpu: Always set WP in CR0

[mirror_edk2.git] / UefiCpuPkg / PiSmmCpuDxeSmm / X64 / SmiEntry.S

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.S b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.S
index b488b74b70756af9d9f675fe9fb578e814a0d695..7e9ac58cb2c96f33b554654b40e23c624522a72c 100644 (file)
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.S
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.S
@@ -144,7 +144,7 @@ Base:
     orb     $1,%ah\r
     wrmsr\r
     movq    %cr0, %rbx\r
-    btsl    $31, %ebx\r
+    orl     $0x080010000, %ebx          # enable paging + WP\r
     movq    %rbx, %cr0\r
     retf\r
 LongMode:                               # long mode (64-bit code) starts here\r