[edk2-devel] [edk2-platforms: PATCH v4 1/9] MinPlatformPkg: Support FSP 2.3 FSP_NON_VOLATILE_STORAGE_HOB2.
Chiu, Chasel
chasel.chiu at intel.com
Thu Oct 14 06:09:01 UTC 2021
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3678
Implementation should search FSP_NON_VOLATILE_STORAGE_HOB2 firstly
and only search FSP_NON_VOLATILE_STORAGE_HOB when former one is not found.
Also added PeiGetLargeVariable () to support the scenarios where the
variable data size is bigger than a single variable size limit. (stored
across multiple variables)
Cc: Nate DeSimone <nathaniel.l.desimone at intel.com>
Cc: Liming Gao <gaoliming at byosoft.com.cn>
Cc: Eric Dong <eric.dong at intel.com>
Signed-off-by: Chasel Chiu <chasel.chiu at intel.com>
---
Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------------------------
Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------
Platform/Intel/MinPlatformPkg/Library/PeiVariableReadLib/PeiVariableReadLib.c | 4 ++--
Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf | 8 ++++++--
Platform/Intel/MinPlatformPkg/Include/Dsc/CorePeiLib.dsc | 1 +
Platform/Intel/MinPlatformPkg/Include/Library/PeiLib.h | 40 +++++++++++++++++++++++++++++++++++-----
Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.inf | 4 +++-
Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec | 1 +
8 files changed, 175 insertions(+), 81 deletions(-)
diff --git a/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c b/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c
index 41ed2550bd..820585f676 100644
--- a/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c
+++ b/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c
@@ -2,7 +2,7 @@
This is the driver that locates the MemoryConfigurationData HOB, if it
exists, and saves the data to nvRAM.
-Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -16,7 +16,9 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <Guid/GlobalVariable.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BaseMemoryLib.h>
-#include <Protocol/VariableLock.h>
+#include <Library/LargeVariableReadLib.h>
+#include <Library/LargeVariableWriteLib.h>
+#include <Guid/FspNonVolatileStorageHob2.h>
/**
This is the standard EFI driver point that detects whether there is a
@@ -40,86 +42,71 @@ SaveMemoryConfigEntryPoint (
VOID *VariableData;
UINTN DataSize;
UINTN BufferSize;
- EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock;
+ BOOLEAN DataIsIdentical;
- DataSize = 0;
- VariableData = NULL;
- GuidHob = NULL;
- HobData = NULL;
+ DataSize = 0;
+ BufferSize = 0;
+ VariableData = NULL;
+ GuidHob = NULL;
+ HobData = NULL;
+ DataIsIdentical = FALSE;
//
// Search for the Memory Configuration GUID HOB. If it is not present, then
// there's nothing we can do. It may not exist on the update path.
+ // Firstly check version2 FspNvsHob.
//
- GuidHob = GetFirstGuidHob (&gFspNonVolatileStorageHobGuid);
+ GuidHob = GetFirstGuidHob (&gFspNonVolatileStorageHob2Guid);
if (GuidHob != NULL) {
- HobData = GET_GUID_HOB_DATA (GuidHob);
- DataSize = GET_GUID_HOB_DATA_SIZE(GuidHob);
+ HobData = (VOID *) (UINTN) ((FSP_NON_VOLATILE_STORAGE_HOB2 *) (UINTN) GuidHob)->NvsDataPtr;
+ DataSize = (UINTN) ((FSP_NON_VOLATILE_STORAGE_HOB2 *) (UINTN) GuidHob)->NvsDataLength;
+ } else {
+ //
+ // Fall back to version1 FspNvsHob
+ //
+ GuidHob = GetFirstGuidHob (&gFspNonVolatileStorageHobGuid);
+ if (GuidHob != NULL) {
+ HobData = GET_GUID_HOB_DATA (GuidHob);
+ DataSize = GET_GUID_HOB_DATA_SIZE (GuidHob);
+ }
+ }
+
+ if (HobData != NULL) {
+ DEBUG ((DEBUG_INFO, "FspNvsHob.NvsDataLength:%d\n", DataSize));
+ DEBUG ((DEBUG_INFO, "FspNvsHob.NvsDataPtr : 0x%x\n", HobData));
if (DataSize > 0) {
//
- // Use the HOB to save Memory Configuration Data
+ // Check if the presently saved data is identical to the data given by MRC/FSP
//
- BufferSize = DataSize;
- VariableData = AllocatePool (BufferSize);
- if (VariableData == NULL) {
- return EFI_UNSUPPORTED;
- }
- Status = gRT->GetVariable (
- L"MemoryConfig",
- &gFspNonVolatileStorageHobGuid,
- NULL,
- &BufferSize,
- VariableData
- );
-
+ Status = GetLargeVariable (L"FspNvsBuffer", &gFspNvsBufferVariableGuid, &BufferSize, NULL);
if (Status == EFI_BUFFER_TOO_SMALL) {
- FreePool (VariableData);
- VariableData = AllocatePool (BufferSize);
- if (VariableData == NULL) {
- return EFI_UNSUPPORTED;
+ if (BufferSize == DataSize) {
+ VariableData = AllocatePool (BufferSize);
+ if (VariableData != NULL) {
+ Status = GetLargeVariable (L"FspNvsBuffer", &gFspNvsBufferVariableGuid, &BufferSize, VariableData);
+ if (!EFI_ERROR (Status) && (BufferSize == DataSize) && (0 == CompareMem (HobData, VariableData, DataSize))) {
+ DataIsIdentical = TRUE;
+ }
+ FreePool (VariableData);
+ }
}
-
- Status = gRT->GetVariable (
- L"MemoryConfig",
- &gFspNonVolatileStorageHobGuid,
- NULL,
- &BufferSize,
- VariableData
- );
}
+ Status = EFI_SUCCESS;
- if ( (EFI_ERROR(Status)) || BufferSize != DataSize || 0 != CompareMem (HobData, VariableData, DataSize)) {
- Status = gRT->SetVariable (
- L"MemoryConfig",
- &gFspNonVolatileStorageHobGuid,
- (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS),
- DataSize,
- HobData
- );
+ if (!DataIsIdentical) {
+ Status = SetLargeVariable (L"FspNvsBuffer", &gFspNvsBufferVariableGuid, TRUE, DataSize, HobData);
ASSERT_EFI_ERROR (Status);
-
- DEBUG((DEBUG_INFO, "Restored Size is 0x%x\n", DataSize));
- }
-
- //
- // Mark MemoryConfig to read-only if the Variable Lock protocol exists
- //
- Status = gBS->LocateProtocol(&gEdkiiVariableLockProtocolGuid, NULL, (VOID **)&VariableLock);
- if (!EFI_ERROR(Status)) {
- Status = VariableLock->RequestToLock(VariableLock, L"MemoryConfig", &gFspNonVolatileStorageHobGuid);
- ASSERT_EFI_ERROR(Status);
+ DEBUG ((DEBUG_INFO, "Saved size of FSP / MRC Training Data: 0x%x\n", DataSize));
+ } else {
+ DEBUG ((DEBUG_INFO, "FSP / MRC Training Data is identical to data from last boot, no need to save.\n"));
}
-
- FreePool (VariableData);
- } else {
- DEBUG((DEBUG_INFO, "Memory save size is %d\n", DataSize));
}
} else {
DEBUG((DEBUG_ERROR, "Memory S3 Data HOB was not found\n"));
}
//
- // This driver does not produce any protocol services, so always unload it.
+ // This driver cannot be unloaded because DxeRuntimeVariableWriteLib constructor will register ExitBootServices callback.
//
- return EFI_REQUEST_UNLOAD_IMAGE;
+ return EFI_SUCCESS;
}
diff --git a/Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.c b/Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.c
index 96dfd588dc..3f8cf761a7 100644
--- a/Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.c
+++ b/Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.c
@@ -1,6 +1,6 @@
/** @file
-Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -9,13 +9,17 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <Library/DebugLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/MemoryAllocationLib.h>
+#include <Library/LargeVariableReadLib.h>
#include <Ppi/ReadOnlyVariable2.h>
/**
- Returns the status whether get the variable success. The function retrieves
- variable through the ReadOnlyVariable2 PPI GetVariable(). The
- returned buffer is allocated using AllocatePool(). The caller is responsible
- for freeing this buffer with FreePool().
+ Returns the status whether get the variable success. The function retrieves
+ variable through the ReadOnlyVariable2 PPI GetVariable().
+
+ If the *Size is 0, the returned buffer is allocated using AllocatePool().
+ The buffer is not expected to be freed as PEI does not support a FreePool().
+
+ If the *Size is non-0, this function just uses caller allocated *Value.
If Name is NULL, then ASSERT().
If Guid is NULL, then ASSERT().
@@ -108,6 +112,71 @@ PeiGetVariable (
return Status;
}
+/**
+ This function returns a "large variable". A large variable is stored across multiple
+ UEFI Variables. This function retrieves the multiple UEFI Variables using
+ ReadOnlyVariable2 PPI GetVariable().
+ The function uses AllocatePages () to allocate the buffer.
+ The caller is responsible for freeing this buffer with FreePages().
+
+ If Name is NULL, then ASSERT().
+ If Guid is NULL, then ASSERT().
+ If Value is NULL, then ASSERT().
+
+ @param[in] Name The pointer to a Null-terminated Unicode string.
+ @param[in] Guid The pointer to an EFI_GUID structure
+ @param[out] Value The buffer point saved the variable info.
+ @param[out] Size The buffer size of the variable.
+
+ @return EFI_OUT_OF_RESOURCES Allocate buffer failed.
+ @return EFI_SUCCESS Find the specified variable.
+ @return Others Errors Return errors from call to gRT->GetVariable.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiGetLargeVariable (
+ IN CHAR16 *Name,
+ IN EFI_GUID *Guid,
+ OUT VOID **Value,
+ OUT UINTN *Size OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ UINTN VariableSize;
+ VOID *VariableData;
+
+ ASSERT (Name != NULL);
+ ASSERT (Guid != NULL);
+ ASSERT (Value != NULL);
+
+ VariableSize = 0;
+ VariableData = NULL;
+ Status = GetLargeVariable (Name, Guid, &VariableSize, NULL);
+ if (Status == EFI_BUFFER_TOO_SMALL) {
+ VariableData = AllocatePages (EFI_SIZE_TO_PAGES (VariableSize));
+ if (VariableData == NULL) {
+ DEBUG ((DEBUG_ERROR, "Error: Cannot create VariableData, out of memory!\n"));
+ ASSERT (FALSE);
+ return EFI_OUT_OF_RESOURCES;
+ }
+ Status = GetLargeVariable (Name, Guid, &VariableSize, VariableData);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Error: Unable to read UEFI variable Status: %r\n", Status));
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+ if (Value != NULL) {
+ *Value = VariableData;
+ }
+ if (Size != NULL) {
+ *Size = VariableSize;
+ }
+ return EFI_SUCCESS;
+ }
+ return Status;
+}
+
EFI_PEI_FILE_HANDLE
InternalGetFfsHandleFromAnyFv (
IN CONST EFI_GUID *NameGuid
@@ -139,7 +208,7 @@ InternalGetFfsHandleFromAnyFv (
/**
Finds the file in any FV and gets file Address and Size
-
+
@param[in] NameGuid File GUID
@param[out] Address Pointer to the File Address
@param[out] Size Pointer to File Size
@@ -162,7 +231,7 @@ PeiGetFfsFromAnyFv (
if (FfsHandle == NULL) {
return EFI_NOT_FOUND;
}
-
+
//
// Need get size
//
@@ -185,7 +254,7 @@ PeiGetFfsFromAnyFv (
@param[in] SectionInstance The Instance of Section to be found
@param[out] OutSectionBuffer The section found, including SECTION_HEADER
@param[out] OutSectionSize The size of section found, including SECTION_HEADER
-
+
@retval EFI_SUCCESS Successfull in reading the section from FV
**/
EFI_STATUS
@@ -263,7 +332,7 @@ PeiGetSectionFromAnyFv (
EFI_COMMON_SECTION_HEADER *Section;
VOID *FileBuffer;
UINTN FileBufferSize;
-
+
Status = PeiGetFfsFromAnyFv (NameGuid, &FileBuffer, &FileBufferSize);
if (EFI_ERROR(Status)) {
return Status;
@@ -282,6 +351,6 @@ PeiGetSectionFromAnyFv (
*Size = SECTION_SIZE(Section) - sizeof (EFI_COMMON_SECTION_HEADER);
*Address = (UINT8 *)*Address + sizeof (EFI_COMMON_SECTION_HEADER);
}
-
+
return EFI_SUCCESS;
}
diff --git a/Platform/Intel/MinPlatformPkg/Library/PeiVariableReadLib/PeiVariableReadLib.c b/Platform/Intel/MinPlatformPkg/Library/PeiVariableReadLib/PeiVariableReadLib.c
index 5eeee12a3c..b7885dd6c2 100644
--- a/Platform/Intel/MinPlatformPkg/Library/PeiVariableReadLib/PeiVariableReadLib.c
+++ b/Platform/Intel/MinPlatformPkg/Library/PeiVariableReadLib/PeiVariableReadLib.c
@@ -67,7 +67,7 @@ VarLibGetVariable (
&gEfiPeiReadOnlyVariable2PpiGuid,
0,
NULL,
- &VariablePpi
+ (VOID **) &VariablePpi
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
@@ -134,7 +134,7 @@ VarLibGetNextVariableName (
&gEfiPeiReadOnlyVariable2PpiGuid,
0,
NULL,
- &VariablePpi
+ (VOID **) &VariablePpi
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
diff --git a/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf b/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf
index 0c8689a6f6..e2dbd2fb49 100644
--- a/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf
+++ b/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf
@@ -1,7 +1,7 @@
### @file
# Component information file for SaveMemoryConfig module
#
-# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2017 - 2021, Intel Corporation. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -23,11 +23,14 @@
DebugLib
MemoryAllocationLib
BaseMemoryLib
+ LargeVariableReadLib
+ LargeVariableWriteLib
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
IntelFsp2Pkg/IntelFsp2Pkg.dec
+ MinPlatformPkg/MinPlatformPkg.dec
[Sources]
SaveMemoryConfig.c
@@ -35,10 +38,11 @@
[Protocols]
gEfiVariableArchProtocolGuid ## CONSUMES
gEfiVariableWriteArchProtocolGuid ## CONSUMES
- gEdkiiVariableLockProtocolGuid
[Guids]
gFspNonVolatileStorageHobGuid ## CONSUMES
+ gFspNonVolatileStorageHob2Guid ## CONSUMES
+ gFspNvsBufferVariableGuid ## PRODUCES
[Depex]
gEfiVariableArchProtocolGuid AND
diff --git a/Platform/Intel/MinPlatformPkg/Include/Dsc/CorePeiLib.dsc b/Platform/Intel/MinPlatformPkg/Include/Dsc/CorePeiLib.dsc
index d3c668d441..c12189bd9a 100644
--- a/Platform/Intel/MinPlatformPkg/Include/Dsc/CorePeiLib.dsc
+++ b/Platform/Intel/MinPlatformPkg/Include/Dsc/CorePeiLib.dsc
@@ -41,6 +41,7 @@
DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
!endif
PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+ VariableReadLib|MinPlatformPkg/Library/BaseVariableReadLibNull/BaseVariableReadLibNull.inf
[LibraryClasses.common.PEI_CORE]
TimerLib|PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
diff --git a/Platform/Intel/MinPlatformPkg/Include/Library/PeiLib.h b/Platform/Intel/MinPlatformPkg/Include/Library/PeiLib.h
index d8b1a47c58..eed6502d84 100644
--- a/Platform/Intel/MinPlatformPkg/Include/Library/PeiLib.h
+++ b/Platform/Intel/MinPlatformPkg/Include/Library/PeiLib.h
@@ -1,6 +1,6 @@
/** @file
-Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -11,11 +11,11 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <PiPei.h>
/**
- Returns the status whether get the variable success. The function retrieves
+ Returns the status whether get the variable success. The function retrieves
variable through the ReadOnlyVariable2 PPI GetVariable().
If the *Size is 0, the returned buffer is allocated using AllocatePool().
- The caller is responsible for freeing this buffer with FreePool().
+ The buffer is not expected to be freed as PEI does not support a FreePool().
If the *Size is non-0, this function just uses caller allocated *Value.
@@ -38,9 +38,39 @@ PeiGetVariable (
OUT UINTN *Size
);
+/**
+ This function returns a "large variable". A large variable is stored across multiple
+ UEFI Variables. This function retrieves the multiple UEFI Variables using
+ ReadOnlyVariable2 PPI GetVariable().
+ The function uses AllocatePages () to allocate the buffer.
+ The caller is responsible for freeing this buffer with FreePages().
+
+ If Name is NULL, then ASSERT().
+ If Guid is NULL, then ASSERT().
+ If Value is NULL, then ASSERT().
+
+ @param[in] Name The pointer to a Null-terminated Unicode string.
+ @param[in] Guid The pointer to an EFI_GUID structure
+ @param[out] Value The buffer point saved the variable info.
+ @param[out] Size The buffer size of the variable.
+
+ @return EFI_OUT_OF_RESOURCES Allocate buffer failed.
+ @return EFI_SUCCESS Find the specified variable.
+ @return Others Errors Return errors from call to gRT->GetVariable.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiGetLargeVariable (
+ IN CHAR16 *Name,
+ IN EFI_GUID *Guid,
+ OUT VOID **Value,
+ OUT UINTN *Size OPTIONAL
+ );
+
/**
Finds the file in any FV and gets file Address and Size
-
+
@param[in] NameGuid File GUID
@param[out] Address Pointer to the File Address
@param[out] Size Pointer to File Size
@@ -57,7 +87,7 @@ PeiGetFfsFromAnyFv (
/**
Finds the section in any FV and gets section Address and Size
-
+
@param[in] NameGuid File GUID
@param[in] SectionType The SectionType of Section to be found
@param[in] SectionInstance The Instance of Section to be found
diff --git a/Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.inf b/Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.inf
index 7e740172a0..bd57cf7870 100644
--- a/Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.inf
+++ b/Platform/Intel/MinPlatformPkg/Library/PeiLib/PeiLib.inf
@@ -1,7 +1,7 @@
## @file
# Component information file for Board Init Test Library
#
-# Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2017 - 2021, Intel Corporation. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -20,9 +20,11 @@
PeiServicesLib
MemoryAllocationLib
DebugLib
+ LargeVariableReadLib
[Packages]
MdePkg/MdePkg.dec
+ MinPlatformPkg/MinPlatformPkg.dec
[Sources]
PeiLib.c
diff --git a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
index bcb42f0ef9..d6e80a66ce 100644
--- a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
+++ b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
@@ -50,6 +50,7 @@
gBdsEventBeforeConsoleAfterTrustedConsoleGuid = {0x51e49ff5, 0x28a9, 0x4159, { 0xac, 0x8a, 0xb8, 0xc4, 0x88, 0xa7, 0xfd, 0xee}}
gBdsEventBeforeConsoleBeforeEndOfDxeGuid = {0xfcf26e41, 0xbda6, 0x4633, { 0xb5, 0x73, 0xd4, 0xb8, 0x0e, 0x6d, 0xd0, 0x78}}
gBdsEventAfterConsoleReadyBeforeBootOptionGuid = {0x8eb3d5dc, 0xf4e7, 0x4b57, { 0xa9, 0xe7, 0x27, 0x39, 0x10, 0xf2, 0x18, 0x9f}}
+ gFspNvsBufferVariableGuid = {0x9c7715cd, 0x8d66, 0x4d2a, { 0x90, 0x0d, 0x01, 0x45, 0x9a, 0x57, 0x59, 0x6b}}
[LibraryClasses]
--
2.28.0.windows.1
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