OvmfPkg: Save MTRR by lockbox in CpuS3DataDxe

Save MTRR by lockbox in CpuS3DataDxe. In S3 boot,
The MTRR setting will be restored in S3Resume.c
in following patches. Then S3Resume.c will wakeup
all APs to load the MTRR setting. This can avoid
waking up APs in CpuS3.c.

Signed-off-by: Dun Tan <dun.tan@intel.com>
Reviewed-by: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/OvmfPkg/CpuS3DataDxe/CpuS3Data.c b/OvmfPkg/CpuS3DataDxe/CpuS3Data.c
index 289048b..eacdfa1 100644
--- a/OvmfPkg/CpuS3DataDxe/CpuS3Data.c
+++ b/OvmfPkg/CpuS3DataDxe/CpuS3Data.c
@@ -9,7 +9,7 @@ number of CPUs reported by the MP Services Protocol, so this module does not
 support hot plug CPUs.  This module can be copied into a CPU specific package

 and customized if these additional features are required.

 

-Copyright (c) 2013 - 2021, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2013 - 2024, Intel Corporation. All rights reserved.<BR>

 Copyright (c) 2015 - 2020, Red Hat, Inc.

 

 SPDX-License-Identifier: BSD-2-Clause-Patent

@@ -26,6 +26,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include <Library/MemoryAllocationLib.h>

 #include <Library/MtrrLib.h>

 #include <Library/UefiBootServicesTableLib.h>

+#include <Library/LockBoxLib.h>

 

 #include <Protocol/MpService.h>

 #include <Guid/EventGroup.h>

@@ -131,6 +132,16 @@ CpuS3DataOnEndOfDxe (
   MtrrGetAllMtrrs (&AcpiCpuDataEx->MtrrTable);

 

   //

+  // Save MTRR in lockbox

+  //

+  Status = SaveLockBox (

+             &gEdkiiS3MtrrSettingGuid,

+             &AcpiCpuDataEx->MtrrTable,

+             sizeof (MTRR_SETTINGS)

+             );

+  ASSERT_EFI_ERROR (Status);

+

+  //

   // Close event, so it will not be invoked again.

   //

   gBS->CloseEvent (Event);