From d042c6e830756e63248f1d760a1dc0817c5ec0e8 Mon Sep 17 00:00:00 2001 From: rsun3 Date: Thu, 10 Mar 2011 07:39:51 +0000 Subject: Add performance library instances for SMM performance measurement. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11363 6f19259b-4bc3-4df7-8a09-765794883524 --- .../SmmCorePerformanceLib/SmmCorePerformanceLib.c | 715 +++++++++++++++++++++ 1 file changed, 715 insertions(+) create mode 100644 MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c (limited to 'MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c') diff --git a/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c b/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c new file mode 100644 index 0000000000..98426c302c --- /dev/null +++ b/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformanceLib.c @@ -0,0 +1,715 @@ +/** @file + Performance library instance used by SMM Core. + + This library provides the performance measurement interfaces and initializes performance + logging for the SMM phase. + It initializes SMM phase performance logging by publishing the Performance Protocol, + which is consumed by SmmPerformanceLib to logging performance data in SMM phase. + + This library is mainly used by SMM Core to start performance logging to ensure that + SMM Performance Protocol is installed at the very beginning of SMM phase. + +Copyright (c) 2011, Intel Corporation. All rights reserved.
+This program and the accompanying materials +are licensed and made available under the terms and conditions of the BSD License +which accompanies this distribution. The full text of the license may be found at +http://opensource.org/licenses/bsd-license.php + +THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + + +#include "SmmCorePerformanceLibInternal.h" + +// +// The data structure to hold global performance data. +// +GAUGE_DATA_HEADER *mGaugeData; + +// +// The current maximum number of logging entries. If current number of +// entries exceeds this value, it will re-allocate a larger array and +// migration the old data to the larger array. +// +UINT32 mMaxGaugeRecords; + +// +// The handle to install Performance Protocol instance. +// +EFI_HANDLE mHandle = NULL; + +BOOLEAN mPerformanceMeasurementEnabled; + +SPIN_LOCK mSmmPerfLock; + +EFI_SMRAM_DESCRIPTOR *mSmramRanges; +UINTN mSmramRangeCount; + +// +// Interfaces for performance protocol. +// +PERFORMANCE_PROTOCOL mPerformanceInterface = { + StartGauge, + EndGauge, + GetGauge +}; + +/** + Searches in the gauge array with keyword Handle, Token and Module. + + This internal function searches for the gauge entry in the gauge array. + If there is an entry that exactly matches the given key word triple + and its end time stamp is zero, then the index of that gauge entry is returned; + otherwise, the the number of gauge entries in the array is returned. + + @param Handle Pointer to environment specific context used + to identify the component being measured. + @param Token Pointer to a Null-terminated ASCII string + that identifies the component being measured. + @param Module Pointer to a Null-terminated ASCII string + that identifies the module being measured. + + @retval The index of gauge entry in the array. + +**/ +UINT32 +SmmSearchForGaugeEntry ( + IN CONST VOID *Handle, OPTIONAL + IN CONST CHAR8 *Token, OPTIONAL + IN CONST CHAR8 *Module OPTIONAL + ) +{ + UINT32 Index; + UINT32 NumberOfEntries; + GAUGE_DATA_ENTRY *GaugeEntryArray; + + if (Token == NULL) { + Token = ""; + } + if (Module == NULL) { + Module = ""; + } + + NumberOfEntries = mGaugeData->NumberOfEntries; + GaugeEntryArray = (GAUGE_DATA_ENTRY *) (mGaugeData + 1); + + for (Index = 0; Index < NumberOfEntries; Index++) { + if ((GaugeEntryArray[Index].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) && + AsciiStrnCmp (GaugeEntryArray[Index].Token, Token, SMM_PERFORMANCE_STRING_LENGTH) == 0 && + AsciiStrnCmp (GaugeEntryArray[Index].Module, Module, SMM_PERFORMANCE_STRING_LENGTH) == 0 && + GaugeEntryArray[Index].EndTimeStamp == 0) { + break; + } + } + + return Index; +} + +/** + Adds a record at the end of the performance measurement log + that records the start time of a performance measurement. + + Adds a record to the end of the performance measurement log + that contains the Handle, Token, and Module. + The end time of the new record must be set to zero. + If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record. + If TimeStamp is zero, the start time in the record is filled in with the value + read from the current time stamp. + + @param Handle Pointer to environment specific context used + to identify the component being measured. + @param Token Pointer to a Null-terminated ASCII string + that identifies the component being measured. + @param Module Pointer to a Null-terminated ASCII string + that identifies the module being measured. + @param TimeStamp 64-bit time stamp. + + @retval EFI_SUCCESS The data was read correctly from the device. + @retval EFI_OUT_OF_RESOURCES There are not enough resources to record the measurement. + +**/ +EFI_STATUS +EFIAPI +StartGauge ( + IN CONST VOID *Handle, OPTIONAL + IN CONST CHAR8 *Token, OPTIONAL + IN CONST CHAR8 *Module, OPTIONAL + IN UINT64 TimeStamp + ) +{ + GAUGE_DATA_ENTRY *GaugeEntryArray; + UINTN GaugeDataSize; + UINTN OldGaugeDataSize; + GAUGE_DATA_HEADER *OldGaugeData; + UINT32 Index; + + AcquireSpinLock (&mSmmPerfLock); + + Index = mGaugeData->NumberOfEntries; + if (Index >= mMaxGaugeRecords) { + // + // Try to enlarge the scale of gauge array. + // + OldGaugeData = mGaugeData; + OldGaugeDataSize = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY) * mMaxGaugeRecords; + + mMaxGaugeRecords *= 2; + GaugeDataSize = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY) * mMaxGaugeRecords; + + mGaugeData = AllocateZeroPool (GaugeDataSize); + if (mGaugeData == NULL) { + return EFI_OUT_OF_RESOURCES; + } + // + // Initialize new data array and migrate old data one. + // + mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize); + + FreePool (OldGaugeData); + } + + GaugeEntryArray = (GAUGE_DATA_ENTRY *) (mGaugeData + 1); + GaugeEntryArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle; + + if (Token != NULL) { + AsciiStrnCpy (GaugeEntryArray[Index].Token, Token, SMM_PERFORMANCE_STRING_LENGTH); + } + if (Module != NULL) { + AsciiStrnCpy (GaugeEntryArray[Index].Module, Module, SMM_PERFORMANCE_STRING_LENGTH); + } + + if (TimeStamp == 0) { + TimeStamp = GetPerformanceCounter (); + } + GaugeEntryArray[Index].StartTimeStamp = TimeStamp; + + mGaugeData->NumberOfEntries++; + + ReleaseSpinLock (&mSmmPerfLock); + + return EFI_SUCCESS; +} + +/** + Searches the performance measurement log from the beginning of the log + for the first matching record that contains a zero end time and fills in a valid end time. + + Searches the performance measurement log from the beginning of the log + for the first record that matches Handle, Token, and Module and has an end time value of zero. + If the record can not be found then return EFI_NOT_FOUND. + If the record is found and TimeStamp is not zero, + then the end time in the record is filled in with the value specified by TimeStamp. + If the record is found and TimeStamp is zero, then the end time in the matching record + is filled in with the current time stamp value. + + @param Handle Pointer to environment specific context used + to identify the component being measured. + @param Token Pointer to a Null-terminated ASCII string + that identifies the component being measured. + @param Module Pointer to a Null-terminated ASCII string + that identifies the module being measured. + @param TimeStamp 64-bit time stamp. + + @retval EFI_SUCCESS The end of the measurement was recorded. + @retval EFI_NOT_FOUND The specified measurement record could not be found. + +**/ +EFI_STATUS +EFIAPI +EndGauge ( + IN CONST VOID *Handle, OPTIONAL + IN CONST CHAR8 *Token, OPTIONAL + IN CONST CHAR8 *Module, OPTIONAL + IN UINT64 TimeStamp + ) +{ + GAUGE_DATA_ENTRY *GaugeEntryArray; + UINT32 Index; + + if (TimeStamp == 0) { + TimeStamp = GetPerformanceCounter (); + } + + Index = SmmSearchForGaugeEntry (Handle, Token, Module); + if (Index >= mGaugeData->NumberOfEntries) { + return EFI_NOT_FOUND; + } + GaugeEntryArray = (GAUGE_DATA_ENTRY *) (mGaugeData + 1); + GaugeEntryArray[Index].EndTimeStamp = TimeStamp; + + return EFI_SUCCESS; +} + +/** + Retrieves a previously logged performance measurement. + + Retrieves the performance log entry from the performance log specified by LogEntryKey. + If it stands for a valid entry, then EFI_SUCCESS is returned and + GaugeDataEntry stores the pointer to that entry. + + @param LogEntryKey The key for the previous performance measurement log entry. + If 0, then the first performance measurement log entry is retrieved. + @param GaugeDataEntry The indirect pointer to the gauge data entry specified by LogEntryKey + if the retrieval is successful. + + @retval EFI_SUCCESS The GuageDataEntry is successfully found based on LogEntryKey. + @retval EFI_NOT_FOUND The LogEntryKey is the last entry (equals to the total entry number). + @retval EFI_INVALIDE_PARAMETER The LogEntryKey is not a valid entry (greater than the total entry number). + @retval EFI_INVALIDE_PARAMETER GaugeDataEntry is NULL. + +**/ +EFI_STATUS +EFIAPI +GetGauge ( + IN UINTN LogEntryKey, + OUT GAUGE_DATA_ENTRY **GaugeDataEntry + ) +{ + UINTN NumberOfEntries; + GAUGE_DATA_ENTRY *LogEntryArray; + + NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries); + if (LogEntryKey > NumberOfEntries) { + return EFI_INVALID_PARAMETER; + } + if (LogEntryKey == NumberOfEntries) { + return EFI_NOT_FOUND; + } + + LogEntryArray = (GAUGE_DATA_ENTRY *) (mGaugeData + 1); + + if (GaugeDataEntry == NULL) { + return EFI_INVALID_PARAMETER; + } + *GaugeDataEntry = &LogEntryArray[LogEntryKey]; + + return EFI_SUCCESS; +} + + +/** + This function check if the address is in SMRAM. + + @param Buffer the buffer address to be checked. + @param Length the buffer length to be checked. + + @retval TRUE this address is in SMRAM. + @retval FALSE this address is NOT in SMRAM. +**/ +BOOLEAN +IsAddressInSmram ( + IN EFI_PHYSICAL_ADDRESS Buffer, + IN UINT64 Length + ) +{ + UINTN Index; + + for (Index = 0; Index < mSmramRangeCount; Index ++) { + if (((Buffer >= mSmramRanges[Index].CpuStart) && (Buffer < mSmramRanges[Index].CpuStart + mSmramRanges[Index].PhysicalSize)) || + ((mSmramRanges[Index].CpuStart >= Buffer) && (mSmramRanges[Index].CpuStart < Buffer + Length))) { + return TRUE; + } + } + + return FALSE; +} + +/** + Communication service SMI Handler entry. + + This SMI handler provides services for the variable wrapper driver. + + @param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister(). + @param[in] RegisterContext Points to an optional handler context which was specified when the + handler was registered. + @param[in, out] CommBuffer A pointer to a collection of data in memory that will + be conveyed from a non-SMM environment into an SMM environment. + @param[in, out] CommBufferSize The size of the CommBuffer. + + @retval EFI_SUCCESS The interrupt was handled and quiesced. No other handlers + should still be called. + @retval EFI_WARN_INTERRUPT_SOURCE_QUIESCED The interrupt has been quiesced but other handlers should + still be called. + @retval EFI_WARN_INTERRUPT_SOURCE_PENDING The interrupt is still pending and other handlers should still + be called. + @retval EFI_INTERRUPT_PENDING The interrupt could not be quiesced. +**/ +EFI_STATUS +EFIAPI +SmmPerformanceHandler ( + IN EFI_HANDLE DispatchHandle, + IN CONST VOID *RegisterContext, + IN OUT VOID *CommBuffer, + IN OUT UINTN *CommBufferSize + ) +{ + EFI_STATUS Status; + SMM_PERF_COMMUNICATE *SmmPerfCommData; + GAUGE_DATA_ENTRY *GaugeData; + UINTN DataSize; + + GaugeData = NULL; + + ASSERT (CommBuffer != NULL); + + SmmPerfCommData = (SMM_PERF_COMMUNICATE*)CommBuffer; + + switch (SmmPerfCommData->Function) { + case SMM_PERF_FUNCTION_GET_GAUGE_ENTRY_NUMBER : + SmmPerfCommData->NumberOfEntries = mGaugeData->NumberOfEntries; + return Status = EFI_SUCCESS; + break; + + case SMM_PERF_FUNCTION_GET_GAUGE_DATA : + if ( SmmPerfCommData->GaugeData == NULL || SmmPerfCommData->NumberOfEntries <= 0 || + (SmmPerfCommData->LogEntryKey + SmmPerfCommData->NumberOfEntries) > mGaugeData->NumberOfEntries) { + Status = EFI_INVALID_PARAMETER; + break; + } + + Status = GetGauge(SmmPerfCommData->LogEntryKey, &GaugeData); + if (EFI_ERROR(Status)) { + break; + } + + // + // Sanity check + // + DataSize = SmmPerfCommData->NumberOfEntries * sizeof(GAUGE_DATA_ENTRY); + if (IsAddressInSmram ((EFI_PHYSICAL_ADDRESS)(UINTN)SmmPerfCommData->GaugeData, DataSize)) { + DEBUG ((EFI_D_ERROR, "Smm Performance Data buffer is in SMRAM!\n")); + Status = EFI_ACCESS_DENIED; + break ; + } + + CopyMem( + (UINT8*)SmmPerfCommData->GaugeData, + (UINT8*)GaugeData, + DataSize + ); + break; + + default: + ASSERT (FALSE); + Status = EFI_UNSUPPORTED; + } + + SmmPerfCommData->ReturnStatus = Status; + return EFI_SUCCESS; +} + +/** + SmmBase2 protocol notify callback function, when SMST and SMM memory service get initialized + this function is callbacked to to initialize the Smm Performance Lib + + @param Event The event of notify protocol. + @param Context Notify event context. + +**/ +VOID +EFIAPI +InitializeSmmCorePerformanceLib ( + IN EFI_EVENT Event, + IN VOID *Context + ) +{ + EFI_STATUS Status; + EFI_HANDLE Handle; + EFI_SMM_ACCESS2_PROTOCOL *SmmAccess; + UINTN Size; + + + // + // Initialize spin lock + // + InitializeSpinLock (&mSmmPerfLock); + + mMaxGaugeRecords = INIT_SMM_GAUGE_DATA_ENTRIES + PcdGet8 (PcdMaxPeiPerformanceLogEntries); + + mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY) * mMaxGaugeRecords)); + ASSERT (mGaugeData != NULL); + + // + // Get SMRAM information + // + Status = gBS->LocateProtocol (&gEfiSmmAccess2ProtocolGuid, NULL, (VOID **)&SmmAccess); + ASSERT_EFI_ERROR (Status); + + Size = 0; + Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL); + ASSERT (Status == EFI_BUFFER_TOO_SMALL); + + Status = gSmst->SmmAllocatePool ( + EfiRuntimeServicesData, + Size, + (VOID **)&mSmramRanges + ); + ASSERT_EFI_ERROR (Status); + + Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmramRanges); + ASSERT_EFI_ERROR (Status); + + mSmramRangeCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR); + + // + // Install the protocol interfaces. + // + Status = gSmst->SmmInstallProtocolInterface ( + &mHandle, + &gSmmPerformanceProtocolGuid, + EFI_NATIVE_INTERFACE, + &mPerformanceInterface + ); + ASSERT_EFI_ERROR (Status); + + /// + /// Register SMM Performance SMI handler + /// + Handle = NULL; + Status = gSmst->SmiHandlerRegister (SmmPerformanceHandler, &gSmmPerformanceProtocolGuid, &Handle); + ASSERT_EFI_ERROR (Status); +} + +/** + The constructor function initializes Performance infrastructure for DXE phase. + + The constructor function publishes Performance protocol, allocates memory to log DXE performance + and merges PEI performance data to DXE performance log. + It will ASSERT() if one of these operations fails and it will always return EFI_SUCCESS. + + @param ImageHandle The firmware allocated handle for the EFI image. + @param SystemTable A pointer to the EFI System Table. + + @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS. + +**/ +EFI_STATUS +EFIAPI +SmmCorePerformanceLibConstructor ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + EFI_EVENT Event; + VOID *Registration; + + mPerformanceMeasurementEnabled = (BOOLEAN) ((PcdGet8(PcdPerformanceLibraryPropertyMask) & PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0); + if (!mPerformanceMeasurementEnabled) { + // + // Do not initialize performance infrastructure if not required. + // + return EFI_SUCCESS; + } + + // + // Create the events to do the library init. + // + Status = gBS->CreateEvent ( + EVT_NOTIFY_SIGNAL, + TPL_CALLBACK, + InitializeSmmCorePerformanceLib, + NULL, + &Event + ); + ASSERT_EFI_ERROR (Status); + + // + // Register for protocol notifications on this event + // + Status = gBS->RegisterProtocolNotify ( + &gEfiSmmBase2ProtocolGuid, + Event, + &Registration + ); + + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + +/** + Adds a record at the end of the performance measurement log + that records the start time of a performance measurement. + + Adds a record to the end of the performance measurement log + that contains the Handle, Token, and Module. + The end time of the new record must be set to zero. + If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record. + If TimeStamp is zero, the start time in the record is filled in with the value + read from the current time stamp. + + @param Handle Pointer to environment specific context used + to identify the component being measured. + @param Token Pointer to a Null-terminated ASCII string + that identifies the component being measured. + @param Module Pointer to a Null-terminated ASCII string + that identifies the module being measured. + @param TimeStamp 64-bit time stamp. + + @retval RETURN_SUCCESS The start of the measurement was recorded. + @retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement. + +**/ +RETURN_STATUS +EFIAPI +StartPerformanceMeasurement ( + IN CONST VOID *Handle, OPTIONAL + IN CONST CHAR8 *Token, OPTIONAL + IN CONST CHAR8 *Module, OPTIONAL + IN UINT64 TimeStamp + ) +{ + EFI_STATUS Status; + + Status = StartGauge (Handle, Token, Module, TimeStamp); + return (RETURN_STATUS) Status; +} + +/** + Searches the performance measurement log from the beginning of the log + for the first matching record that contains a zero end time and fills in a valid end time. + + Searches the performance measurement log from the beginning of the log + for the first record that matches Handle, Token, and Module and has an end time value of zero. + If the record can not be found then return RETURN_NOT_FOUND. + If the record is found and TimeStamp is not zero, + then the end time in the record is filled in with the value specified by TimeStamp. + If the record is found and TimeStamp is zero, then the end time in the matching record + is filled in with the current time stamp value. + + @param Handle Pointer to environment specific context used + to identify the component being measured. + @param Token Pointer to a Null-terminated ASCII string + that identifies the component being measured. + @param Module Pointer to a Null-terminated ASCII string + that identifies the module being measured. + @param TimeStamp 64-bit time stamp. + + @retval RETURN_SUCCESS The end of the measurement was recorded. + @retval RETURN_NOT_FOUND The specified measurement record could not be found. + +**/ +RETURN_STATUS +EFIAPI +EndPerformanceMeasurement ( + IN CONST VOID *Handle, OPTIONAL + IN CONST CHAR8 *Token, OPTIONAL + IN CONST CHAR8 *Module, OPTIONAL + IN UINT64 TimeStamp + ) +{ + EFI_STATUS Status; + + Status = EndGauge (Handle, Token, Module, TimeStamp); + return (RETURN_STATUS) Status; +} + +/** + Attempts to retrieve a performance measurement log entry from the performance measurement log. + + Attempts to retrieve the performance log entry specified by LogEntryKey. If LogEntryKey is + zero on entry, then an attempt is made to retrieve the first entry from the performance log, + and the key for the second entry in the log is returned. If the performance log is empty, + then no entry is retrieved and zero is returned. If LogEntryKey is not zero, then the performance + log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is + returned. If LogEntryKey is the key for the last entry in the log, then the last log entry is + retrieved and an implementation specific non-zero key value that specifies the end of the performance + log is returned. If LogEntryKey is equal this implementation specific non-zero key value, then no entry + is retrieved and zero is returned. In the cases where a performance log entry can be returned, + the log entry is returned in Handle, Token, Module, StartTimeStamp, and EndTimeStamp. + If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT(). + If Handle is NULL, then ASSERT(). + If Token is NULL, then ASSERT(). + If Module is NULL, then ASSERT(). + If StartTimeStamp is NULL, then ASSERT(). + If EndTimeStamp is NULL, then ASSERT(). + + @param LogEntryKey On entry, the key of the performance measurement log entry to retrieve. + 0, then the first performance measurement log entry is retrieved. + On exit, the key of the next performance log entry. + @param Handle Pointer to environment specific context used to identify the component + being measured. + @param Token Pointer to a Null-terminated ASCII string that identifies the component + being measured. + @param Module Pointer to a Null-terminated ASCII string that identifies the module + being measured. + @param StartTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement + was started. + @param EndTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement + was ended. + + @return The key for the next performance log entry (in general case). + +**/ +UINTN +EFIAPI +GetPerformanceMeasurement ( + IN UINTN LogEntryKey, + OUT CONST VOID **Handle, + OUT CONST CHAR8 **Token, + OUT CONST CHAR8 **Module, + OUT UINT64 *StartTimeStamp, + OUT UINT64 *EndTimeStamp + ) +{ + EFI_STATUS Status; + GAUGE_DATA_ENTRY *GaugeData; + + GaugeData = NULL; + + ASSERT (Handle != NULL); + ASSERT (Token != NULL); + ASSERT (Module != NULL); + ASSERT (StartTimeStamp != NULL); + ASSERT (EndTimeStamp != NULL); + + Status = GetGauge (LogEntryKey++, &GaugeData); + + // + // Make sure that LogEntryKey is a valid log entry key, + // + ASSERT (Status != EFI_INVALID_PARAMETER); + + if (EFI_ERROR (Status)) { + // + // The LogEntryKey is the last entry (equals to the total entry number). + // + return 0; + } + + ASSERT (GaugeData != NULL); + + *Handle = (VOID *) (UINTN) GaugeData->Handle; + *Token = GaugeData->Token; + *Module = GaugeData->Module; + *StartTimeStamp = GaugeData->StartTimeStamp; + *EndTimeStamp = GaugeData->EndTimeStamp; + + return LogEntryKey; +} + +/** + Returns TRUE if the performance measurement macros are enabled. + + This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of + PcdPerformanceLibraryPropertyMask is set. Otherwise FALSE is returned. + + @retval TRUE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of + PcdPerformanceLibraryPropertyMask is set. + @retval FALSE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of + PcdPerformanceLibraryPropertyMask is clear. + +**/ +BOOLEAN +EFIAPI +PerformanceMeasurementEnabled ( + VOID + ) +{ + return mPerformanceMeasurementEnabled; +} + + -- cgit v1.2.3