Within function ApWakeupFunction():
When source level debugger is enabled, AP interrupts will be enabled by
EnableDebugAgent(). Then the AP function will be executed by:
Procedure (Parameter);
After the AP function returns, AP interrupts will be disabled when the
APs are placed in loop mode (both HltLoop and MwaiLoop).
However, at ExitBootServices, ApWakeupFunction() is called with
'Procedure' equals to RelocateApLoop().
(ExitBootServices callback registered within InitMpGlobalData())
RelocateApLoop() never returns, so it has to disable the AP interrupts by
itself. However, we find that interrupts are only disabled for the
HltLoop case, but not for the MwaitLoop case (within file MpFuncs.nasm).
This commit adds the missing disabling of AP interrupts for MwaitLoop.
Also, for X64, this commit will disable the interrupts before switching to
32-bit mode.
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Jeff Fan <vanjeff_919@hotmail.com>
;------------------------------------------------------------------------------ ;\r
;------------------------------------------------------------------------------ ;\r
-; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>\r
+; Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>\r
; This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution. The full text of the license may be found at\r
; This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution. The full text of the license may be found at\r
cmp cl, 1 ; Check mwait-monitor support\r
jnz HltLoop\r
MwaitLoop:\r
cmp cl, 1 ; Check mwait-monitor support\r
jnz HltLoop\r
MwaitLoop:\r
mov eax, esp\r
xor ecx, ecx\r
xor edx, edx\r
mov eax, esp\r
xor ecx, ecx\r
xor edx, edx\r
;------------------------------------------------------------------------------ ;\r
;------------------------------------------------------------------------------ ;\r
-; Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>\r
+; Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>\r
; This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution. The full text of the license may be found at\r
; This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution. The full text of the license may be found at\r
global ASM_PFX(AsmRelocateApLoop)\r
ASM_PFX(AsmRelocateApLoop):\r
AsmRelocateApLoopStart:\r
global ASM_PFX(AsmRelocateApLoop)\r
ASM_PFX(AsmRelocateApLoop):\r
AsmRelocateApLoopStart:\r
+ cli ; Disable interrupt before switching to 32-bit mode\r
mov rax, [rsp + 40] ; CountTofinish\r
lock dec dword [rax] ; (*CountTofinish)--\r
mov rsp, r9\r
mov rax, [rsp + 40] ; CountTofinish\r
lock dec dword [rax] ; (*CountTofinish)--\r
mov rsp, r9\r
jnz HltLoop\r
mov ebx, edx ; Save C-State to ebx\r
MwaitLoop:\r
jnz HltLoop\r
mov ebx, edx ; Save C-State to ebx\r
MwaitLoop:\r
mov eax, esp ; Set Monitor Address\r
xor ecx, ecx ; ecx = 0\r
xor edx, edx ; edx = 0\r
mov eax, esp ; Set Monitor Address\r
xor ecx, ecx ; ecx = 0\r
xor edx, edx ; edx = 0\r