diff options
| -rw-r--r-- | UefiCpuPkg/Library/MpInitLib/Ia32/MpFuncs.nasm | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/Ia32/MpFuncs.nasm b/UefiCpuPkg/Library/MpInitLib/Ia32/MpFuncs.nasm index d117f09ef5..c0fe631635 100644 --- a/UefiCpuPkg/Library/MpInitLib/Ia32/MpFuncs.nasm +++ b/UefiCpuPkg/Library/MpInitLib/Ia32/MpFuncs.nasm @@ -1,5 +1,5 @@ ;------------------------------------------------------------------------------ ;
-; Copyright (c) 2015 - 2023, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2015 - 2024, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
@@ -225,6 +225,10 @@ RendezvousFunnelProcEnd: ; specific to SEV-ES support and are not applicable on IA32.
;-------------------------------------------------------------------------------------
AsmRelocateApLoopGenericStart:
+ mov eax, cr0
+ btr eax, 31 ; Clear CR0.PG
+ mov cr0, eax ; Disable paging since the page table might be unavailiable
+
mov eax, esp
mov esp, [eax + 12] ; TopOfApStack
push dword [eax] ; push return address for stack trace
|