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2026-08-26MdeModulePkg/Core/Dxe: Add interrupt-enable nesting guardMichael D Kinney1-0/+20
Add interrupt-enable recursion depth tracking using mInterruptEnableNestDepth and a bounded assertion in CoreSetInterruptState(). This provides early detection for unintended recursive interrupt-enable loops. Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
2026-08-26MdeModulePkg/Core/Dxe: Refactor CoreSetInterruptState enable pathMichael D Kinney1-7/+6
Refactor the CoreSetInterruptState(TRUE) flow so EnableInterrupt() is invoked through a single call site. Behavior is unchanged: interrupts remain disabled in SMM and are enabled outside SMM. Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
2026-02-24MdeModulePkg: Replace include guards with #pragma onceMichael Kubacki1-4/+1
Replace traditional `#ifndef`/`#define`/`#endif` include guards with `#pragma` once. `#pragma once` is a widely supported preprocessor directive that prevents header files from being included multiple times. It is supported by all toolchains used to build edk2: GCC, Clang/LLVM, and MSVC. Compared to macro-based include guards, `#pragma once`: - Eliminates the risk of macro name collisions or copy/paste errors where two headers inadvertently use the same guard macro. - Eliminate inconsistency in the way include guard macros are named (e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.). - Reduces boilerplate (three lines replaced by one). - Avoids polluting the macro namespace with guard symbols. - Can improve build times as the preprocessor can skip re-opening the file entirely, rather than re-reading it to find the matching `#endif` ("multiple-include optimization"). - Note that some compilers may already optimize traditional include guards, by recognzining the idiomatic pattern. This change is made acknowledging that overall portability of the code will technically be reduced, as `#pragma once` is not part of the C/C++ standards. However, this is considered acceptable given: 1. edk2 already defines a subset of supported compilers in BaseTools/Conf/tools_def.template, all of which have supported `#pragma once` for over two decades. 2. There have been concerns raised to the project about inconsistent include guard naming and potential macro collisions. Approximate compiler support dates: - MSVC: Supported since Visual C++ 4.2 (1996) - GCC: Supported since 3.4 (2004) (http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html) - Clang (LLVM based): Since initial release in 2007 Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
2025-10-30MdeModulePkg/Core/Dxe: Fix TPL inversion from DEBUG() messageMichael D Kinney1-4/+4
PR #11443 introduced a regression by adding a DEBUG() message when the lock for events is acquired and that lock is at TPL_HIGH_LEVEL. If DEBUG() messages are routed through Report Status Code, and the Report Status Code Protocol has not been located yet, then a call to gBS->LocateProtocol() is made and that call raises TPL to TPL_NOTIFY which causes a TPL inversion. The event lock is used to atomically update gEventSignalQueue. There is no need for the DEBUG() message to within the event lock scope. The fix is to scope the event lock to only the InsertHeadList() call to update gEventSignalQueue. Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
2025-09-16MdeModulePkg/DxeMain: Add debug code for Event Group notify functionsPhil Noh1-1/+13
There are a lot of notify callback events for Event Groups. Usually they are not reported unless there is a debug code in the callback itself. The debug message helps to check which/when the callback is registered and executed in POST. Also helps to notice the callback sequence. It depends on DEBUG_EVENT flag enabled by PcdFixedDebugPrintErrorLevel PCD token. Signed-off-by: Phil Noh <Phil.Noh@amd.com>
2021-12-07MdeModulePkg: Apply uncrustify changesMichael Kubacki4-161/+132
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the MdeModulePkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
2021-12-07MdeModulePkg: Change OPTIONAL keyword usage styleMichael D Kinney1-9/+8
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3760 Update all use of ', OPTIONAL' to ' OPTIONAL,' for function params. Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael Kubacki <michael.kubacki@microsoft.com> Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
2021-12-07MdeModulePkg: Change use of EFI_D_* to DEBUG_*Michael D Kinney1-2/+2
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3739 Update all use of EFI_D_* defines in DEBUG() macros to DEBUG_* defines. Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael Kubacki <michael.kubacki@microsoft.com> Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
2019-10-09MdeModulePkg: document workaround for EFI_RUNTIME_EVENT_ENTRY PI spec bugLaszlo Ersek1-0/+8
The PI spec (v1.7) correctly specifies "EFI_RUNTIME_EVENT_ENTRY.Event" in natural language, but the field type in the structure definition itself is wrong -- it should be EFI_EVENT, not (EFI_EVENT*). This spec bug is likely unfixable for compatibility reasons, and so edk2 works it around already. We should clearly document the workaround. Functionally, this patch is a no-op. (I've also requested a non-normative (informative) clarification for the PI spec: <https://mantis.uefi.org/mantis/view.php?id=2017>.) Cc: Dandan Bi <dandan.bi@intel.com> Cc: Hao A Wu <hao.a.wu@intel.com> Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Liming Gao <liming.gao@intel.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
2019-04-09MdeModulePkg: Replace BSD License with BSD+Patent LicenseMichael D Kinney4-28/+4
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
2018-06-28MdeModulePkg: Clean up source filesLiming Gao1-2/+2
1. Do not use tab characters 2. No trailing white space in one line 3. All files must end with CRLF Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao <liming.gao@intel.com> Reviewed-by: Star Zeng <star.zeng@intel.com>
2017-09-29MdeModulePkg/Tpl: Fix negative value left shiftHao Wu1-3/+9
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=695 Within function CoreRestoreTpl(), left shift a negative value -2 is used in: "while (((-2 << NewTpl) & gEventPending) != 0) {" which involves undefined behavior. According to the C11 spec, Section 6.5.7: > 4 The result of E1 << E2 is E1 left-shifted E2 bit positions; vacated > bits are filled with zeros. If E1 has an unsigned type, the value > of the result is E1 * 2^E2 , reduced modulo one more than the > maximum value representable in the result type. If E1 has a signed > type and nonnegative value, and E1 * 2^E2 is representable in the > result type, then that is the resulting value; otherwise, the > behavior is undefined. This commit refines the code logic to avoid left shifting the negative value. Cc: Steven Shi <steven.shi@intel.com> Cc: Eric Dong <eric.dong@intel.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <liming.gao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Star Zeng <star.zeng@intel.com>
2017-01-20MdeModulePkg: Use EfiEventEmptyFunction from UefiLibStar Zeng1-2/+2
Use EfiEventEmptyFunction from UefiLib and remove the duplication of event empty function. REF: https://bugzilla.tianocore.org/show_bug.cgi?id=298 Cc: Feng Tian <feng.tian@intel.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com>
2016-10-27MdeModulePkg/Core: Fix typos in commentsGary Lin1-1/+1
- paramters -> parameters - funciton -> function - dependecy -> dependency - evauated -> evaluated - genric -> generic - retore -> restore - Protocl -> Protocol - availible -> available - elasped -> elapsed - sarted -> started - boundry -> boundary - permenent -> permanent - debuging -> debugging - availble -> available Cc: Feng Tian <feng.tian@intel.com> Cc: Star Zeng <star.zeng@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Gary Lin <glin@suse.com> Reviewed-by: Feng Tian <feng.tian@intel.com> Reviewed-by: Star Zeng <star.zeng@intel.com>
2016-01-27MdeModulePkg DxeCore: Avoid the closed event to be signaled wronglyStar Zeng1-1/+6
Signal a closed event will still invoke the event notification function, it could only be exposed when no the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit set in PcdDebugPropertyMask. For example: gBS->CreateEvent ( EVT_NOTIFY_SIGNAL, TPL_CALLBACK, CallbackFun, NULL, &Event ); gBS->CloseEvent (Event); gBS->SignalEvent (Event); <- CallbackFun still be invoked Although the case to signal a closed event is abnormal, the code could still be enhanced to avoid it. Cc: Liming Gao <liming.gao@intel.com> Cc: Feng Tian <feng.tian@intel.com> Cc: Thomas Palmer <thomas.palmer@hpe.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19754 6f19259b-4bc3-4df7-8a09-765794883524
2015-09-21MdeModulePkg: Remove event from protocol database only if registeredSamer El-Haj-Mahmoud2-4/+16
In a CloseEvent, an UnregisterProtocolNotify is done unconditionally. There is a penalty associated with searching the protocol database on every CloseEvent and impacts performance, especially during Network IO. Unregister needs to be done only if the Event is for a RegisterProtocolNotify. So extend the ExFlag in IEVENT to a UINT8 and define new flags that can be set to indicate if the Event is part of a group, or registered on a protocol notify. Then in CloseEvent, call UnregisterProtocolNotify only if the register protocol notify flag is set. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud@hpe.com> Reviewed-by: Feng Tian <feng.tian@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18517 6f19259b-4bc3-4df7-8a09-765794883524
2015-06-01MdeModulePkg DxeCore: Add debug message to assist TPL related issues.Star Zeng1-3/+9
The debug message is to print the current TPL and requested TPL value. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17543 6f19259b-4bc3-4df7-8a09-765794883524
2014-08-071) Add type cast for better coding style.Feng Tian1-1/+1
2) replace StrCpy() usage in Variable driver with StrnCpy(). Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Feng Tian <feng.tian@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15770 6f19259b-4bc3-4df7-8a09-765794883524
2014-07-09The UEFI specification does not say anything when the pointers passed toOlivier Martin1-2/+12
WaitForEvent() are NULL. Passing NULL pointer would cause a segmentation fault in the current code. This change prevents to get segmentation faults in this case. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> Signed-off-by: Feng Tian <feng.tian@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15643 6f19259b-4bc3-4df7-8a09-765794883524
2013-10-29Fix the bug that SetTimer () cannot work when Type is TimerPeriodic and ↵Elvin Li1-1/+4
TriggerTime is 0. Signed-off-by: Elvin Li <elvin.li@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14811 6f19259b-4bc3-4df7-8a09-765794883524
2012-08-28Fix comparisons of enumerated types which may cause warnings for some compilers.rsun31-1/+1
Signed-off-by: Sun Rui <rui.sun@intel.com> Reviewed-by: Gao Liming <liming.gao@intel.com> git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13686 6f19259b-4bc3-4df7-8a09-765794883524
2012-04-26Return EFI_INVALID_PARAMETER when Type has either EVT_NOTIFY_SIGNAL or ↵lzeng142-5/+51
EVT_NOTIFY_WAIT set and NotifyTpl is not a supported TPL level. Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Chao Zhang <chao.b.zhang@intel.com> git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13222 6f19259b-4bc3-4df7-8a09-765794883524
2011-06-17MdeModulePkg DXE Core: Add Idle event during BootServices WaitForEventjljusten1-3/+18
Signal an Idle event during BootServices WaitForEvent. Signed-off-by: jljusten Reviewed-by: mdkinney Reviewed-by: rsun3 git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11841 6f19259b-4bc3-4df7-8a09-765794883524
2011-02-12Correct typo in word in DxeCore.lgao41-1/+1
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11307 6f19259b-4bc3-4df7-8a09-765794883524
2010-09-16Refine code to make code run safely.ydong101-1/+1
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10880 6f19259b-4bc3-4df7-8a09-765794883524
2010-04-24Update the copyright notice formathhtian4-8/+8
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10420 6f19259b-4bc3-4df7-8a09-765794883524
2010-02-13Update DXE Core to be compatible with PI 1.2 SMM Drivers.mdkinney1-7/+18
PI 1.2 SMM Drivers are allowed to call UEFI/DXE services and Protocols from the entry point of the PI 1.2 SMM Driver. These UEFI/DXE services and Protocols may directly or indirectly calls the UEFI Boot Services RaiseTPL() and RestoreTPL(). These UEFI Boot Services use the CPU Architectural Protocol to enable interrupts if the TPL level is below TPL_HIGH_LEVEL and enable interrupts of the TPL is at TPL_HIGH_LEVEL. Interrupts should be masked while executing SMM drivers, so if a direct or indirect call to the UEFI Boot Service RestoreTPL() would enable interrupts, then an interrupt could be incorrectly delivered in SMM context. The solution is for the DXE Core to register for the PI 1.2 SMM Base2 Protocol. If that protocol is present in the platform, then the DXE Core can use the SMM Base 2 Protocol's InSmm() function to determine if the platform is currently executing in SMM content. If the current context is in SMM, then do not allow any requests to be forwarded to the CPU Architecture Protocol to enable interrupts. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9997 6f19259b-4bc3-4df7-8a09-765794883524
2010-01-19Improve coding style in MdeModulePkg.rsun32-38/+35
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9793 6f19259b-4bc3-4df7-8a09-765794883524
2009-01-15Apply code to avoid security warnings.qhuang81-9/+7
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7279 6f19259b-4bc3-4df7-8a09-765794883524
2008-12-16Clean up to update the reference of the these macros:qhuang81-1/+1
EFI_SIGNATURE_16 -> SIGNATURE_16 EFI_SIGNATURE_32 -> SIGNATURE_32 EFI_SIGNATURE_64 -> SIGNATURE_64 EFI_FIELD_OFFSET -> OFFSET_OF EFI_MAX_BIT -> MAX_BIT EFI_MAX_ADDRESS -> MAX_ADDRESS These macros are not defined in UEFI spec. It makes more sense to use the equivalent macros in Base.h to avoid alias. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7056 6f19259b-4bc3-4df7-8a09-765794883524
2008-10-21Fix several coding style violationsqhuang82-7/+7
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6163 6f19259b-4bc3-4df7-8a09-765794883524
2008-09-23move header files in MdeModulePkg\Core\Dxe except DxeMain.h into their ↵eric_tian4-1/+94
corresponding sub-module directories. It is used to provide good modularity. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5949 6f19259b-4bc3-4df7-8a09-765794883524
2008-09-17Apply HighBitSet() in MDE baseLib to retire the internal function ↵qhuang81-32/+2
CoreHighestSetBit(). git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5920 6f19259b-4bc3-4df7-8a09-765794883524
2008-09-17Adjust the function layout of Timer.c to remove the prototype to reduce sync ↵qhuang81-113/+70
efforts. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5918 6f19259b-4bc3-4df7-8a09-765794883524
2008-09-16Merge the global data in ExecData.c to Event.ceric_tian2-75/+59
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5901 6f19259b-4bc3-4df7-8a09-765794883524
2008-09-16Comments for CoreInitializeMemoryServices should be updatederic_tian1-1/+1
Comments for CoreInitializeGcdServices should be updated. Comments for CoreInitializeEventServices should be updated. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5899 6f19259b-4bc3-4df7-8a09-765794883524
2008-08-27Clean up DxeCore to remove duplicate memory allocation & device path utility ↵qhuang84-4/+4
services in Library.c.DxeCore should use MemoryAllocationLib & DevicePathLib for these API. Minor cleanup the coding style: #include <DxeMain.h> should be changed to #include "DxeMain.h" since "DxeMain.h" is not pubic header fie. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5742 6f19259b-4bc3-4df7-8a09-765794883524
2008-08-02Fix UEFI Boot Service CreateEvent() to follow UEFI Specification with ↵mdkinney1-2/+2
respect to the use of TPL_APPLICATION git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5606 6f19259b-4bc3-4df7-8a09-765794883524
2008-07-24Code Scrub for Dxe Core.qhuang83-58/+58
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5560 6f19259b-4bc3-4df7-8a09-765794883524
2008-07-18Code scrub for DxeCoreqhuang83-40/+24
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5520 6f19259b-4bc3-4df7-8a09-765794883524
2008-05-21Update to fix minor coding style issues.qhuang84-41/+27
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5256 6f19259b-4bc3-4df7-8a09-765794883524
2008-05-21Change the file name case to follow coding style: The first character should ↵qhuang81-0/+0
be capital. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5253 6f19259b-4bc3-4df7-8a09-765794883524
2008-05-21Change the file name case to follow coding style: The first character should ↵qhuang81-0/+0
be capital. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5252 6f19259b-4bc3-4df7-8a09-765794883524
2008-05-21Change the file name case to follow coding style: The first character should ↵qhuang81-0/+0
be capital. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5251 6f19259b-4bc3-4df7-8a09-765794883524
2008-05-21Change the file name case to follow coding style: The first character should ↵qhuang81-0/+0
be capital. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5250 6f19259b-4bc3-4df7-8a09-765794883524
2008-05-13Minor coding style adjustment for DxeCore.qhuang81-5/+5
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5196 6f19259b-4bc3-4df7-8a09-765794883524
2008-05-09Fix the prediction warnings in DxeMain.qhuang81-3/+3
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5190 6f19259b-4bc3-4df7-8a09-765794883524
2008-05-09Add doxygen style comments for functions in DxeMain.qhuang83-358/+232
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5189 6f19259b-4bc3-4df7-8a09-765794883524
2008-04-09Add comments and DoxyGen format for these files.lgao44-49/+20
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5028 6f19259b-4bc3-4df7-8a09-765794883524
2008-02-14Fix a conformance issue in gBS->CreateEvent() & gBS->CreateEventEx():qhuang81-17/+29
1. gBS->CreateEventEx() with EventGroup = NULL should behavior like gBS->CreateEvent() 2. EVT_SIGNAL_EXIT_BOOT_SERVICES & EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE are invalid parameters for gBS->CreateEventEx() if the EventGroup is not NULL. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4692 6f19259b-4bc3-4df7-8a09-765794883524
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