Re: [edk2-devel] [PATCH v4 1/1] MdeModulePkg: Support customized FV Migration Information

["Wang Fan" <fan.wang@intel.com>]

Hi Ray, Liming, Mike and Jian

I have updated the patch v4: https://edk2.groups.io/g/devel/message/112276

Pull Request: https://github.com/tianocore/edk2/pull/5124


v2:
- Update commit message for better describe this feature

v3:
- Add more descriptions for "gEdkiiToMigrateFvInfoGuid" PPI usages and background, but still keep the name.
- Update "FvOrgBase" to "FvTemporaryRamBase" in EDKII_TO_MIGRATE_FV_INFO.
- Remove flag "FLAGS_SKIP_FV_MIGRATION", since it's not needed.
- Add more descriptions to flag "FLAGS_SKIP_FV_RAW_DATA_COPY".
- Remove the variable MigrateAllFvs to simplify logic.
- Correct "allocate pool" to "allocate pages" to align with descriptions.

v4:
- Re-design EDKII_MIGRATION_INFO to include all FV migration info in one Hob
- Update "FvTemporaryRamBase" to "FvOrgBaseOnTempRam" to avoid misunderstanding
- Update flag name "FLAGS_SKIP_FV_RAW_DATA_COPY" to "FLAGS_FV_RAW_DATA_COPY "
- Refine the logic to NOT impact building MigratedFvInfo hob with raw data copy flag

Best Regards
Fan

-----Original Message-----
From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Wang Fan
Sent: Monday, December 11, 2023 5:06 PM
To: devel@edk2.groups.io
Cc: Wang, Fan <fan.wang@intel.com>; Kinney, Michael D <michael.d.kinney@intel.com>; Gao, Liming <gaoliming@byosoft.com.cn>; Ni, Ray <ray.ni@intel.com>; Jiang, Guomin <guomin.jiang@intel.com>; Wang, Jian J <jian.j.wang@intel.com>
Subject: [edk2-devel] [PATCH v4 1/1] MdeModulePkg: Support customized FV Migration Information

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4533

There are use cases which not all FVs need be migrated from TempRam to permanent memory before TempRam tears down. This new guid is introduced to avoid unnecessary FV migration to improve boot performance. Platform can publish MigrationInfo hob with this guid to customize FV migration info, and PeiCore will only migrate FVs indicated by this Hob info.

This is a backwards compatible change, PeiCore will check MigrationInfo hob before migration. If MigrationInfo hobs exists, only migrate FVs recorded by hobs. If MigrationInfo hobs not exists, migrate all FVs to permanent memory.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Guomin Jiang <guomin.jiang@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Signed-off-by: Fan Wang <fan.wang@intel.com>
---
 MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c | 79 +++++++++++++------
 MdeModulePkg/Core/Pei/PeiMain.inf             |  1 +
 MdeModulePkg/Include/Guid/MigratedFvInfo.h    | 42 +++++++++-
 MdeModulePkg/MdeModulePkg.dec                 |  3 +-
 SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c             |  7 +-
 SecurityPkg/Tcg/TcgPei/TcgPei.c               |  7 +-
 6 files changed, 111 insertions(+), 28 deletions(-)

diff --git a/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c b/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
index 5f32ebb560..0086087e82 100644
--- a/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
+++ b/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
@@ -1184,7 +1184,12 @@ EvacuateTempRam (
    PEI_CORE_FV_HANDLE            PeiCoreFvHandle;   EFI_PEI_CORE_FV_LOCATION_PPI  *PeiCoreFvLocationPpi;+  EFI_PEI_HOB_POINTERS          Hob;+  EDKII_MIGRATION_INFO          *MigrationInfo;+  TO_MIGRATE_FV_INFO            *ToMigrateFvInfo;+  UINT32                        FvMigrationFlags;   EDKII_MIGRATED_FV_INFO        MigratedFvInfo;+  UINTN                         Index;    ASSERT (Private->PeiMemoryInstalled); @@ -1211,6 +1216,13 @@ EvacuateTempRam (
    ConvertPeiCorePpiPointers (Private, &PeiCoreFvHandle); +  Hob.Raw = GetFirstGuidHob (&gEdkiiMigrationInfoGuid);+  if (Hob.Raw != NULL) {+    MigrationInfo = GET_GUID_HOB_DATA (Hob);+  } else {+    MigrationInfo = NULL;+  }+   for (FvIndex = 0; FvIndex < Private->FvCount; FvIndex++) {     FvHeader = Private->Fv[FvIndex].FvHeader;     ASSERT (FvHeader != NULL);@@ -1224,20 +1236,27 @@ EvacuateTempRam (
           )         )     {-      //-      // Allocate page to save the rebased PEIMs, the PEIMs will get dispatched later.-      //-      Status =  PeiServicesAllocatePages (-                  EfiBootServicesCode,-                  EFI_SIZE_TO_PAGES ((UINTN)FvHeader->FvLength),-                  &FvHeaderAddress-                  );-      ASSERT_EFI_ERROR (Status);-      MigratedFvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)FvHeaderAddress;+      if ((MigrationInfo == NULL) || (MigrationInfo->MigrateAll == TRUE)) {+        // Migrate all FVs and copy raw data+        FvMigrationFlags = FLAGS_FV_RAW_DATA_COPY;+      } else {+        for (Index = 0; Index < MigrationInfo->ToMigrateFvCount; Index++) {+          ToMigrateFvInfo = ((TO_MIGRATE_FV_INFO *)(MigrationInfo + 1)) + Index;+          if (ToMigrateFvInfo->FvOrgBaseOnTempRam == (UINT32)(UINTN)FvHeader) {+            // This FV is to migrate+            FvMigrationFlags = ToMigrateFvInfo->FvMigrationFlags;+            break;+          }+        }++        if (Index == MigrationInfo->ToMigrateFvCount) {+          // This FV is not expected to migrate+          continue;+        }+      }        //-      // Allocate pool to save the raw PEIMs, which is used to keep consistent context across-      // multiple boot and PCR0 will keep the same no matter if the address of allocated page is changed.+      // Allocate pages to save the rebased PEIMs, the PEIMs will get dispatched later.       //       Status =  PeiServicesAllocatePages (                   EfiBootServicesCode,@@ -1245,7 +1264,8 @@ EvacuateTempRam (
                   &FvHeaderAddress                   );       ASSERT_EFI_ERROR (Status);-      RawDataFvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)FvHeaderAddress;+      MigratedFvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)FvHeaderAddress;+      CopyMem (MigratedFvHeader, FvHeader, (UINTN)FvHeader->FvLength);        DEBUG ((         DEBUG_VERBOSE,@@ -1256,17 +1276,34 @@ EvacuateTempRam (
         ));        //-      // Copy the context to the rebased pages and raw pages, and create hob to save the-      // information. The MigratedFvInfo HOB will never be produced when-      // PcdMigrateTemporaryRamFirmwareVolumes is FALSE, because the PCD control the-      // feature.+      // Create hob to save MigratedFvInfo, this hob will only be produced when+      // Migration feature PCD PcdMigrateTemporaryRamFirmwareVolumes is set to TRUE.       //-      CopyMem (MigratedFvHeader, FvHeader, (UINTN)FvHeader->FvLength);-      CopyMem (RawDataFvHeader, MigratedFvHeader, (UINTN)FvHeader->FvLength);       MigratedFvInfo.FvOrgBase  = (UINT32)(UINTN)FvHeader;       MigratedFvInfo.FvNewBase  = (UINT32)(UINTN)MigratedFvHeader;-      MigratedFvInfo.FvDataBase = (UINT32)(UINTN)RawDataFvHeader;+      MigratedFvInfo.FvDataBase = 0;       MigratedFvInfo.FvLength   = (UINT32)(UINTN)FvHeader->FvLength;++      //+      // When FLAGS_FV_RAW_DATA_COPY bit is set, copy the context to the raw pages and+      // reset raw data base address in MigratedFvInfo hob.+      //+      if ((FvMigrationFlags & FLAGS_FV_RAW_DATA_COPY) == FLAGS_FV_RAW_DATA_COPY) {+        DEBUG ((DEBUG_INFO, "  Copying Raw Data ...\n"));+        //+        // Allocate pages to save the raw PEIMs+        //+        Status =  PeiServicesAllocatePages (+                    EfiBootServicesCode,+                    EFI_SIZE_TO_PAGES ((UINTN)FvHeader->FvLength),+                    &FvHeaderAddress+                    );+        ASSERT_EFI_ERROR (Status);+        RawDataFvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)FvHeaderAddress;+        CopyMem (RawDataFvHeader, MigratedFvHeader, (UINTN)FvHeader->FvLength);+        MigratedFvInfo.FvDataBase = (UINT32)(UINTN)RawDataFvHeader;+      }+       BuildGuidDataHob (&gEdkiiMigratedFvInfoGuid, &MigratedFvInfo, sizeof (MigratedFvInfo));        //@@ -1330,8 +1367,6 @@ EvacuateTempRam (
     }   } -  RemoveFvHobsInTemporaryMemory (Private);-   return Status; } diff --git a/MdeModulePkg/Core/Pei/PeiMain.inf b/MdeModulePkg/Core/Pei/PeiMain.inf
index 0cf357371a..893bdc0527 100644
--- a/MdeModulePkg/Core/Pei/PeiMain.inf
+++ b/MdeModulePkg/Core/Pei/PeiMain.inf
@@ -78,6 +78,7 @@
   gEfiFirmwareFileSystem3Guid   gStatusCodeCallbackGuid   gEdkiiMigratedFvInfoGuid                      ## SOMETIMES_PRODUCES     ## HOB+  gEdkiiMigrationInfoGuid                       ## SOMETIMES_CONSUMES     ## HOB  [Ppis]   gEfiPeiStatusCodePpiGuid                      ## SOMETIMES_CONSUMES # PeiReportStatusService is not ready if this PPI doesn't existdiff --git a/MdeModulePkg/Include/Guid/MigratedFvInfo.h b/MdeModulePkg/Include/Guid/MigratedFvInfo.h
index aca2332a0e..1c8b0dfefc 100644
--- a/MdeModulePkg/Include/Guid/MigratedFvInfo.h
+++ b/MdeModulePkg/Include/Guid/MigratedFvInfo.h
@@ -9,13 +9,53 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #ifndef __EDKII_MIGRATED_FV_INFO_GUID_H__ #define __EDKII_MIGRATED_FV_INFO_GUID_H__ +//+// FLAGS_FV_RAW_DATA_COPY indicates FV raw data will be copied to permanent memory+// or not. When FV is migrated to permanent memory, it will be rebased and raw+// data will be lost. This bit can be configured as below values:+// 0: FV raw data will not be used in later phase, and the copy will be skipped to+//    optimize boot performance.+// 1: FV raw data will be copied to permanent memory for later phase use (such as+//    FV measurement).+//+#define FLAGS_FV_RAW_DATA_COPY  BIT0++///+/// In real use cases, not all FVs need migrate to permanent memory before TempRam tears+/// down. EDKII_MIGRATION_INFO hob should be published by platform to indicate which+/// FVs need migration to optimize boot performance. If this hob is not detected by Pei+/// Core, all FVs on TempRam will be migrated and FV raw data will also be copied.+/// Only one EDKII_MIGRATION_INFO hob should be published by platform, and this hob will+/// take effect only when migration feature is enabled by PCD.+///+typedef struct {+  UINT32    FvOrgBaseOnTempRam;        // Original FV address on Temporary Ram+  //+  // FV Migration Flags:+  // Bit0: Indicate to copy FV raw data or not+  // Others: Reserved bits+  //+  UINT32    FvMigrationFlags;+} TO_MIGRATE_FV_INFO;++typedef struct {+  BOOLEAN    MigrateAll;                    // Migrate all FVs and also copy FV raw data+  //+  // ToMigrateFvCount and ToMigrateFvInfo array indicate which FVs need be migrated, and+  // these info should be ignored when MigrateAll field is set to TRUE.+  //+  UINT32     ToMigrateFvCount;+  // TO_MIGRATE_FV_INFO    ToMigrateFvInfo[];+} EDKII_MIGRATION_INFO;+ typedef struct {   UINT32    FvOrgBase;         // original FV address   UINT32    FvNewBase;         // new FV address-  UINT32    FvDataBase;        // original FV data+  UINT32    FvDataBase;        // original FV data, 0 means raw data is not copied   UINT32    FvLength;          // Fv Length } EDKII_MIGRATED_FV_INFO; +extern EFI_GUID  gEdkiiMigrationInfoGuid; extern EFI_GUID  gEdkiiMigratedFvInfoGuid;  #endif // #ifndef __EDKII_MIGRATED_FV_INFO_GUID_H__diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 1a162e97e6..a2cd83345f 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -421,7 +421,8 @@
   gEdkiiCapsuleOnDiskNameGuid = { 0x98c80a4f, 0xe16b, 0x4d11, { 0x93, 0x9a, 0xab, 0xe5, 0x61, 0x26, 0x3, 0x30 } }    ## Include/Guid/MigratedFvInfo.h-  gEdkiiMigratedFvInfoGuid = { 0xc1ab12f7, 0x74aa, 0x408d, { 0xa2, 0xf4, 0xc6, 0xce, 0xfd, 0x17, 0x98, 0x71 } }+  gEdkiiMigrationInfoGuid   = { 0xb4b140a5, 0x72f6, 0x4c21, { 0x93, 0xe4, 0xac, 0xc4, 0xec, 0xcb, 0x23, 0x23 } }+  gEdkiiMigratedFvInfoGuid  = { 0xc1ab12f7, 0x74aa, 0x408d, { 0xa2, 0xf4, 0xc6, 0xce, 0xfd, 0x17, 0x98, 0x71 } }    ## Include/Guid/RngAlgorithm.h   gEdkiiRngAlgorithmUnSafe = { 0x869f728c, 0x409d, 0x4ab4, {0xac, 0x03, 0x71, 0xd3, 0x09, 0xc1, 0xb3, 0xf4 }}diff --git a/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c b/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c
index 1caaa4e319..daaf49e644 100644
--- a/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c
+++ b/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c
@@ -726,8 +726,11 @@ MeasureFvImage (
       //       // Found the migrated FV info       //-      FvOrgBase  = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvOrgBase;-      FvDataBase = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvDataBase;+      FvOrgBase = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvOrgBase;+      if (MigratedFvInfo->FvDataBase != 0) {+        FvDataBase = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvDataBase;+      }+       break;     } diff --git a/SecurityPkg/Tcg/TcgPei/TcgPei.c b/SecurityPkg/Tcg/TcgPei/TcgPei.c
index 5aa80511aa..d35c2ad0bc 100644
--- a/SecurityPkg/Tcg/TcgPei/TcgPei.c
+++ b/SecurityPkg/Tcg/TcgPei/TcgPei.c
@@ -463,8 +463,11 @@ MeasureFvImage (
       //       // Found the migrated FV info       //-      FvOrgBase  = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvOrgBase;-      FvDataBase = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvDataBase;+      FvOrgBase = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvOrgBase;+      if (MigratedFvInfo->FvDataBase != 0) {+        FvDataBase = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvDataBase;+      }+       break;     } -- 
2.26.2.windows.1



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