Reviewed-by: Jiaxin Wu <jiaxin...@intel.com>
> -----Original Message-----
> From: Ni, Ray <ray...@intel.com>
> Sent: Wednesday, May 31, 2023 7:35 PM
> To: devel@edk2.groups.io
> Cc: Wu, Jiaxin <jiaxin...@intel.com>; Bi, Dandan <dandan...@intel.com>;
> Gao, Liming <gaolim...@byosoft.com.cn>; Wang, Jian J
> <jian.j.w...@intel.com>
> Subject: [PATCH V2 5/6] MdeModulePkg/SmmPerformanceLib: Disable perf-
> logging after ExitBS
>
> Because SMM perf-logging is migrated to non-SMRAM at ReadyToBoot
> by DxeCorePerformanceLib, the perf-logging after ExitBS is useless and
> impact the SMI latency at runtime.
> Hence the SmmPerformanceLib is updated to disable perf-logging
> after ExitBS.
>
> Cc: Jiaxin Wu <jiaxin...@intel.com>
> Cc: Dandan Bi <dandan...@intel.com>
> Cc: Liming Gao <gaolim...@byosoft.com.cn>
> Cc: Jian J Wang <jian.j.w...@intel.com>
> ---
> .../SmmPerformanceLib/SmmPerformanceLib.c | 63
> ++++++++++++++++++-
> .../SmmPerformanceLib/SmmPerformanceLib.inf | 4 ++
> 2 files changed, 66 insertions(+), 1 deletion(-)
>
> diff --git
> a/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c
> b/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c
> index 623f8a978c..b9c33c0f64 100644
> --- a/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c
> +++ b/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c
> @@ -23,6 +23,36 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
> // The cached SMM Performance Protocol and SMM PerformanceEx
> Protocol interface.
>
> EDKII_PERFORMANCE_MEASUREMENT_PROTOCOL
> *mPerformanceMeasurement = NULL;
>
> BOOLEAN mPerformanceMeasurementEnabled;
>
> +VOID
> *mPerformanceLibExitBootServicesRegistration;
>
> +
>
> +/**
>
> + This is the Event call back function is triggered in SMM to notify the
> Library
>
> + the system is entering runtime phase.
>
> +
>
> + @param[in] Protocol Points to the protocol's unique identifier
>
> + @param[in] Interface Points to the interface instance
>
> + @param[in] Handle The handle on which the interface was installed
>
> +
>
> + @retval EFI_SUCCESS SmmAtRuntimeCallBack runs successfully
>
> + **/
>
> +EFI_STATUS
>
> +EFIAPI
>
> +SmmPerformanceLibExitBootServicesCallback (
>
> + IN CONST EFI_GUID *Protocol,
>
> + IN VOID *Interface,
>
> + IN EFI_HANDLE Handle
>
> + )
>
> +{
>
> + //
>
> + // Disable performance measurement after ExitBootServices because
>
> + // 1. Performance measurement might impact SMI latency at runtime;
>
> + // 2. Performance log is copied to non SMRAM at ReadyToBoot so runtime
> performance
>
> + // log is not useful.
>
> + //
>
> + mPerformanceMeasurementEnabled = FALSE;
>
> +
>
> + return EFI_SUCCESS;
>
> +}
>
>
>
> /**
>
> The constructor function initializes the Performance Measurement Enable
> flag
>
> @@ -40,9 +70,40 @@ SmmPerformanceLibConstructor (
> IN EFI_SYSTEM_TABLE *SystemTable
>
> )
>
> {
>
> + EFI_STATUS Status;
>
> +
>
> mPerformanceMeasurementEnabled = (BOOLEAN)((PcdGet8
> (PcdPerformanceLibraryPropertyMask) &
> PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);
>
>
>
> - return EFI_SUCCESS;
>
> + Status = gSmst->SmmRegisterProtocolNotify (
>
> + &gEdkiiSmmExitBootServicesProtocolGuid,
>
> + SmmPerformanceLibExitBootServicesCallback,
>
> + &mPerformanceLibExitBootServicesRegistration
>
> + );
>
> + ASSERT_EFI_ERROR (Status);
>
> +
>
> + return Status;
>
> +}
>
> +
>
> +EFI_STATUS
>
> +EFIAPI
>
> +SmmPerformanceLibDestructor (
>
> + IN EFI_HANDLE ImageHandle,
>
> + IN EFI_SYSTEM_TABLE *SystemTable
>
> + )
>
> +{
>
> + EFI_STATUS Status;
>
> +
>
> + //
>
> + // Unregister SmmExitBootServices notification.
>
> + //
>
> + Status = gSmst->SmmRegisterProtocolNotify (
>
> + &gEdkiiSmmExitBootServicesProtocolGuid,
>
> + NULL,
>
> + &mPerformanceLibExitBootServicesRegistration
>
> + );
>
> + ASSERT_EFI_ERROR (Status);
>
> +
>
> + return Status;
>
> }
>
>
>
> /**
>
> diff --git
> a/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.inf
> b/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.inf
> index d79cd5c8da..002462f5ca 100644
> --- a/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.inf
> +++
> b/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.inf
> @@ -21,6 +21,7 @@
> LIBRARY_CLASS = PerformanceLib|DXE_SMM_DRIVER
>
>
>
> CONSTRUCTOR = SmmPerformanceLibConstructor
>
> + DESTRUCTOR = SmmPerformanceLibDestructor
>
>
>
> #
>
> # The following information is for reference only and not required by the
> build tools.
>
> @@ -46,5 +47,8 @@
> [Guids]
>
> gEdkiiSmmPerformanceMeasurementProtocolGuid ##
> SOMETIMES_CONSUMES ## UNDEFINED # Locate protocol
>
>
>
> +[Protocols]
>
> + gEdkiiSmmExitBootServicesProtocolGuid ## CONSUMES
>
> +
>
> [Pcd]
>
> gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask ##
> CONSUMES
>
> --
> 2.39.1.windows.1
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