Re: [edk2-devel] [PATCH 05/18] UefiCpuPkg: LoadMtrrData for all cpu in S3Resume

["Ni, Ray" <ray.ni@intel.com>]

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Reviewed-by: Ray Ni <ray.ni@intel.com>



Thanks,
Ray
________________________________
From: Tan, Dun <dun.tan@intel.com>
Sent: Friday, May 10, 2024 18:08
To: devel@edk2.groups.io <devel@edk2.groups.io>
Cc: Ni, Ray <ray.ni@intel.com>; Kumar, Rahul R <rahul.r.kumar@intel.com>; Gerd Hoffmann <kraxel@redhat.com>; Wu, Jiaxin <jiaxin.wu@intel.com>
Subject: [PATCH 05/18] UefiCpuPkg: LoadMtrrData for all cpu in S3Resume

In this commit, S3Resume.c wakeup all Aps to run
LoadMtrrData for all cpu before transfer to CpuS3.c
in smm cpu driver. The MtrrSetting table can be restored
by gEdkiiS3MtrrSettingGuid which is saved by lockbox in
PEI phase. This can avoid waking up APs in CpuS3.c.

Signed-off-by: Dun Tan <dun.tan@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
---
 UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c       | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf |  2 ++
 2 files changed, 51 insertions(+)

diff --git a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
index 4cf676fb3e..3e85eab28f 100644
--- a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
+++ b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
@@ -39,6 +39,7 @@
 #include <Library/DebugAgentLib.h>
 #include <Library/LocalApicLib.h>
 #include <Library/ReportStatusCodeLib.h>
+#include <Library/MtrrLib.h>

 #include <Library/HobLib.h>
 #include <Library/LockBoxLib.h>
@@ -938,6 +939,20 @@ S3ResumeExecuteBootScript (
   CpuDeadLoop ();
 }

+/**
+  Sync up the MTRR values for all processors.
+
+  @param[in] MtrrTable  Address of MTRR setting.
+**/
+VOID
+EFIAPI
+LoadMtrrData (
+  IN VOID  *MtrrTable
+  )
+{
+  MtrrSetAllMtrrs (MtrrTable);
+}
+
 /**
   Restores the platform to its preboot configuration for an S3 resume and
   jumps to the OS waking vector.
@@ -990,6 +1005,7 @@ S3RestoreConfig2 (
   BOOLEAN                        InterruptStatus;
   IA32_CR0                       Cr0;
   EDKII_PEI_MP_SERVICES2_PPI     *MpService2Ppi;
+  MTRR_SETTINGS                  MtrrTable;

   TempAcpiS3Context                 = 0;
   TempEfiBootScriptExecutorVariable = 0;
@@ -1082,6 +1098,39 @@ S3RestoreConfig2 (
       Status = SmmAccess->Open ((EFI_PEI_SERVICES **)GetPeiServicesTablePointer (), SmmAccess, Index);
     }

+    //
+    // Get MP Services2 Ppi to pass it to Smm S3.
+    //
+    Status = PeiServicesLocatePpi (
+               &gEdkiiPeiMpServices2PpiGuid,
+               0,
+               NULL,
+               (VOID **)&MpService2Ppi
+               );
+    ASSERT_EFI_ERROR (Status);
+
+    //
+    // Restore MTRR setting
+    //
+    VarSize = sizeof (MTRR_SETTINGS);
+    Status  = RestoreLockBox (
+                &gEdkiiS3MtrrSettingGuid,
+                &MtrrTable,
+                &VarSize
+                );
+    ASSERT_EFI_ERROR (Status);
+
+    //
+    // Sync up the MTRR values for all processors.
+    //
+    Status = MpService2Ppi->StartupAllCPUs (
+                              MpService2Ppi,
+                              (EFI_AP_PROCEDURE)LoadMtrrData,
+                              0,
+                              (VOID *)&MtrrTable
+                              );
+    ASSERT_EFI_ERROR (Status);
+
     SmramDescriptor  = (EFI_SMRAM_DESCRIPTOR *)GET_GUID_HOB_DATA (GuidHob);
     SmmS3ResumeState = (SMM_S3_RESUME_STATE *)(UINTN)SmramDescriptor->CpuStart;

diff --git a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf
index 9c9b6f3db3..890c588aa8 100644
--- a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf
+++ b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf
@@ -67,6 +67,7 @@
   LocalApicLib
   ReportStatusCodeLib
   LockBoxLib
+  MtrrLib

 [Guids]
   gEfiBootScriptExecutorVariableGuid            ## SOMETIMES_CONSUMES ## UNDEFINED # LockBox
@@ -79,6 +80,7 @@
   ## SOMETIMES_PRODUCES ## UNDEFINED # Install PPI
   ## SOMETIMES_CONSUMES ## UNDEFINED # Used to do smm communication
   gEdkiiS3SmmInitDoneGuid
+  gEdkiiS3MtrrSettingGuid

 [Ppis]
   gEfiPeiS3Resume2PpiGuid                       ## PRODUCES
--
2.31.1.windows.1



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