[edk2-devel] [Patch V2 05/18] UefiCpuPkg: LoadMtrrData for all cpu in S3Resume

["duntan" <dun.tan@intel.com>]

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>
Reviewed-by: 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       | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf |  4 +++-
 2 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
index 4cf676fb3e..078ae2d72d 100644
--- a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
+++ b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume.c
@@ -4,7 +4,7 @@
   This module will execute the boot script saved during last boot and after that,
   control is passed to OS waking up handler.
 
-  Copyright (c) 2006 - 2023, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2024, Intel Corporation. All rights reserved.<BR>
   Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -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..54de8bc91f 100644
--- a/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf
+++ b/UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf
@@ -5,7 +5,7 @@
 # This module will excute the boot script saved during last boot and after that,
 # control is passed to OS waking up handler.
 #
-# Copyright (c) 2010 - 2023, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2010 - 2024, Intel Corporation. All rights reserved.<BR>
 # Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
 #
 # SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -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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