This patch is based on patch series:
https://edk2.groups.io/g/devel/message/105492.
I don't want to send a V3 for just including the additional patch.
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Ni, Ray
> Sent: Wednesday, June 7, 2023 4:38 PM
> To: devel@edk2.groups.io
> Cc: Dong, Eric <eric.d...@intel.com>; Kumar, Rahul R
> <rahul.r.ku...@intel.com>; Gerd Hoffmann <kra...@redhat.com>
> Subject: [edk2-devel] [PATCH] UefiCpuPkg/SmmCpu: Add
> PcdSmmApPerfLogEnable control AP perf-logging
>
> When a platform has lots of CPU cores/threads, perf-logging on every
> AP produces lots of records. When this multiplies with number of SMIs
> during post, the records are even more.
>
> So, this patch adds a new PCD PcdSmmApPerfLogEnable (default TRUE)
> to allow platform to turn off perf-logging on APs.
>
> Cc: Eric Dong <eric.d...@intel.com>
> Cc: Rahul Kumar <rahul1.ku...@intel.com>
> Cc: Gerd Hoffmann <kra...@redhat.com>
> ---
> UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c | 2 +-
> UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf | 1 +
> UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c | 11 ++++++++++-
> UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h | 4 +++-
> UefiCpuPkg/UefiCpuPkg.dec | 6 ++++++
> 5 files changed, 21 insertions(+), 3 deletions(-)
>
> diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
> b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
> index bcd90f0671..8364b73242 100644
> --- a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
> +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
> @@ -784,7 +784,7 @@ BSPHandler (
> // Any SMM MP performance logging after this point will be migrated in next
> SMI.
>
> //
>
> PERF_CODE (
>
> - MigrateMpPerf (gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus);
>
> + MigrateMpPerf (gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus,
> CpuIndex);
>
> );
>
>
>
> //
>
> diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
> b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
> index 4864532c35..d864ae9101 100644
> --- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
> +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
> @@ -128,6 +128,7 @@
> gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmProfileRingBuffer ##
> CONSUMES
>
> gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmFeatureControlMsrLock ##
> CONSUMES
>
> gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSwitchToLongMode ##
> CONSUMES
>
> + gUefiCpuPkgTokenSpaceGuid.PcdSmmApPerfLogEnable ##
> CONSUMES
>
>
>
> [Pcd]
>
> gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber ##
> SOMETIMES_CONSUMES
>
> diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c
> b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c
> index c13556af46..92c67f31bf 100644
> --- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c
> +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c
> @@ -39,16 +39,25 @@ InitializeMpPerf (
> Migrate MP performance data to standardized performance database.
>
>
>
> @param NumberofCpus Number of processors in the platform.
>
> + @param BspIndex The index of the BSP.
>
> **/
>
> VOID
>
> MigrateMpPerf (
>
> - UINTN NumberofCpus
>
> + UINTN NumberofCpus,
>
> + UINTN BspIndex
>
> )
>
> {
>
> UINTN CpuIndex;
>
> UINTN MpProcecureId;
>
>
>
> for (CpuIndex = 0; CpuIndex < NumberofCpus; CpuIndex++) {
>
> + if ((CpuIndex != BspIndex) && !FeaturePcdGet (PcdSmmApPerfLogEnable)) {
>
> + //
>
> + // Skip migrating AP performance data if AP perf-logging is disabled.
>
> + //
>
> + continue;
>
> + }
>
> +
>
> for (MpProcecureId = 0; MpProcecureId < SMM_MP_PERF_PROCEDURE_ID
> (SmmMpProcedureMax); MpProcecureId++) {
>
> if (mSmmMpProcedurePerformance[CpuIndex].Begin[MpProcecureId] != 0) {
>
> PERF_START (NULL, gSmmMpPerfProcedureName[MpProcecureId], NULL,
> mSmmMpProcedurePerformance[CpuIndex].Begin[MpProcecureId]);
>
> diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h
> b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h
> index b148a99e86..5ad1734cc8 100644
> --- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h
> +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h
> @@ -44,10 +44,12 @@ InitializeMpPerf (
> Migrate MP performance data to standardized performance database.
>
>
>
> @param NumberofCpus Number of processors in the platform.
>
> + @param BspIndex The index of the BSP.
>
> **/
>
> VOID
>
> MigrateMpPerf (
>
> - UINTN NumberofCpus
>
> + UINTN NumberofCpus,
>
> + UINTN BspIndex
>
> );
>
>
>
> /**
>
> diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec
> index d31c3b127c..5b0ac64e33 100644
> --- a/UefiCpuPkg/UefiCpuPkg.dec
> +++ b/UefiCpuPkg/UefiCpuPkg.dec
> @@ -175,6 +175,12 @@
> # @Prompt Support SmmFeatureControl.
>
>
> gUefiCpuPkgTokenSpaceGuid.PcdSmmFeatureControlEnable|TRUE|BOOLEAN|0x
> 32132110
>
>
>
> + ## Indicates if SMM perf logging in APs will be enabled.<BR><BR>
>
> + # TRUE - SMM perf logging in APs will be enabled.<BR>
>
> + # FALSE - SMM perf logging in APs will not be enabled.<BR>
>
> + # @Prompt Enable SMM perf logging in APs.
>
> +
> gUefiCpuPkgTokenSpaceGuid.PcdSmmApPerfLogEnable|TRUE|BOOLEAN|0x321
> 32114
>
> +
>
> [PcdsFixedAtBuild]
>
> ## List of exception vectors which need switching stack.
>
> # This PCD will only take into effect if PcdCpuStackGuard is enabled.
>
> --
> 2.39.1.windows.1
>
>
>
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