[Patch V3 5/9] MdeModulePkg/Universal/SmbiosDxe: Scan for existing tables

["Zhiguang Liu" <zhiguang.liu@intel.com>]

V1:
The default EfiSmbiosProtocol operates on an empty SMBIOS table.
The SMBIOS tables are provided by the bootloader on UefiPayloadPkg.
Scan for existing tables in SmbiosDxe and load them if they seem valid.

This fixes the settings menu not showing any hardware information, instead
only "0 MB RAM" was displayed.

Tests showed that the OS can still see the SMBIOS tables.

V2:
SmbiosDxe will get the SMBIOS from a guid Hob.
Aslo will keep the SmbiosHandle if it is available.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Dandan Bi <dandan.bi@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
---
 MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c   | 320 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.h   |   4 +++-
 MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf |   5 ++++-
 3 files changed, 325 insertions(+), 4 deletions(-)

diff --git a/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c b/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c
index 3cdb0b1ed7..3579c4d890 100644
--- a/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c
+++ b/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c
@@ -2,7 +2,7 @@
   This code produces the Smbios protocol. It also responsible for constructing
   SMBIOS table into system table.
 
-Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2009 - 2021, Intel Corporation. All rights reserved.<BR>
 SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -148,6 +148,31 @@ SMBIOS_TABLE_3_0_ENTRY_POINT Smbios30EntryPointStructureData = {
   //
   0
 };
+
+/**
+  Validates a SMBIOS table entry point.
+
+  @param  TableEntry       The SmBios table entry to validate.
+  @param  TableAddress     On exit, point to the smbios table addres.
+  @param  TableMaximumSize On exit, point to the maximum size of the table.
+
+  @retval TRUE           SMBIOS table entry point is valid.
+  @retval FALSE          SMBIOS table entry point is malformed.
+
+**/
+typedef
+BOOLEAN
+(* IS_SMBIOS_TABLE_VALID) (
+  IN  VOID               *TableEntry,
+  OUT VOID               **TableAddress,
+  OUT UINTN              *TableMaximumSize
+  );
+typedef struct {
+  EFI_GUID               *Guid;
+  IS_SMBIOS_TABLE_VALID  IsValid;
+} IS_SMBIOS_TABLE_VALID_ENTRY;
+
+
 /**
 
   Get the full size of SMBIOS structure including optional strings that follow the formatted structure.
@@ -1408,6 +1433,296 @@ SmbiosTableConstruction (
   }
 }
 
+/**
+  Validates a SMBIOS 2.0 table entry point.
+
+  @param  TableEntry       The SmBios table entry to validate.
+  @param  TableAddress     On exit, point to the smbios table addres.
+  @param  TableMaximumSize On exit, point to the maximum size of the table.
+
+  @retval TRUE           SMBIOS table entry point is valid.
+  @retval FALSE          SMBIOS table entry point is malformed.
+
+**/
+STATIC
+BOOLEAN
+IsValidSmbios20Table (
+  IN  VOID               *TableEntry,
+  OUT VOID               **TableAddress,
+  OUT UINTN              *TableMaximumSize
+  )
+{
+  UINT8                                      Checksum;
+  SMBIOS_TABLE_ENTRY_POINT                   *SmbiosTable;
+  SmbiosTable = (SMBIOS_TABLE_ENTRY_POINT *) TableEntry;
+
+  if (CompareMem (SmbiosTable->AnchorString, "_SM_", 4) != 0) {
+    return FALSE;
+  }
+
+  if (CompareMem (SmbiosTable->IntermediateAnchorString, "_DMI_", 5) != 0) {
+    return FALSE;
+  }
+
+  //
+  // The actual value of the EntryPointLength should be 1Fh.
+  // However, it was incorrectly stated in version 2.1 of smbios specification.
+  // Therefore, 0x1F and 0x1E are both accepted.
+  //
+  if (SmbiosTable->EntryPointLength != 0x1E && SmbiosTable->EntryPointLength != sizeof (SMBIOS_TABLE_ENTRY_POINT)) {
+    return FALSE;
+  }
+
+  //
+  // MajorVersion should not be less than 2.
+  //
+  if (SmbiosTable->MajorVersion < 2) {
+    return FALSE;
+  }
+
+  //
+  // The whole struct check sum should be zero
+  //
+  Checksum = CalculateSum8 (
+               (UINT8 *) SmbiosTable,
+               SmbiosTable->EntryPointLength
+               );
+  if (Checksum != 0) {
+    return FALSE;
+  }
+
+  //
+  // The Intermediate Entry Point Structure check sum should be zero.
+  //
+  Checksum = CalculateSum8 (
+               (UINT8 *) SmbiosTable + OFFSET_OF (SMBIOS_TABLE_ENTRY_POINT, IntermediateAnchorString),
+               SmbiosTable->EntryPointLength - OFFSET_OF (SMBIOS_TABLE_ENTRY_POINT, IntermediateAnchorString)
+               );
+  if (Checksum != 0) {
+    return FALSE;
+  }
+
+  *TableAddress     = (VOID *) (UINTN) SmbiosTable->TableAddress;
+  *TableMaximumSize = SmbiosTable->TableLength;
+  return TRUE;
+}
+
+/**
+  Validates a SMBIOS 3.0 table entry point.
+
+  @param  TableEntry       The SmBios table entry to validate.
+  @param  TableAddress     On exit, point to the smbios table addres.
+  @param  TableMaximumSize On exit, point to the maximum size of the table.
+
+  @retval TRUE           SMBIOS table entry point is valid.
+  @retval FALSE          SMBIOS table entry point is malformed.
+
+**/
+STATIC
+BOOLEAN
+IsValidSmbios30Table (
+  IN  VOID               *TableEntry,
+  OUT VOID               **TableAddress,
+  OUT UINTN              *TableMaximumSize
+  )
+{
+  UINT8                          Checksum;
+  SMBIOS_TABLE_3_0_ENTRY_POINT   *SmbiosTable;
+  SmbiosTable = (SMBIOS_TABLE_3_0_ENTRY_POINT *) TableEntry;
+
+  if (CompareMem (SmbiosTable->AnchorString, "_SM3_", 5) != 0) {
+    return FALSE;
+  }
+  if (SmbiosTable->EntryPointLength < sizeof (SMBIOS_TABLE_3_0_ENTRY_POINT)) {
+    return FALSE;
+  }
+  if (SmbiosTable->MajorVersion < 3) {
+    return FALSE;
+  }
+
+  //
+  // The whole struct check sum should be zero
+  //
+  Checksum = CalculateSum8 (
+               (UINT8 *) SmbiosTable,
+               SmbiosTable->EntryPointLength
+               );
+  if (Checksum != 0) {
+    return FALSE;
+  }
+
+  *TableAddress     = (VOID *) (UINTN) SmbiosTable->TableAddress;
+  *TableMaximumSize = SmbiosTable->TableMaximumSize;
+  return TRUE;
+}
+
+/**
+  Parse an existing SMBIOS table and insert it using SmbiosAdd.
+
+  @param  ImageHandle           The EFI_HANDLE to this driver.
+  @param  Smbios                The SMBIOS table to parse.
+  @param  Length                The length of the SMBIOS table.
+
+  @retval EFI_SUCCESS           SMBIOS table was parsed and installed.
+  @retval EFI_OUT_OF_RESOURCES  Record was not added due to lack of system resources.
+  @retval EFI_INVALID_PARAMETER Smbios is not a correct smbios table
+
+**/
+STATIC
+EFI_STATUS
+ParseAndAddExistingSmbiosTable (
+  IN EFI_HANDLE                    ImageHandle,
+  IN SMBIOS_STRUCTURE_POINTER      Smbios,
+  IN UINTN                         Length
+  )
+{
+  EFI_STATUS                    Status;
+  CHAR8                         *String;
+  EFI_SMBIOS_HANDLE             SmbiosHandle;
+  SMBIOS_STRUCTURE_POINTER      SmbiosEnd;
+
+  SmbiosEnd.Raw = Smbios.Raw + Length;
+
+  if (Smbios.Raw >= SmbiosEnd.Raw || Smbios.Raw == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  do {
+    //
+    // Make sure not to access memory beyond SmbiosEnd
+    //
+    if (Smbios.Raw + sizeof (SMBIOS_STRUCTURE) > SmbiosEnd.Raw ||
+      Smbios.Raw + sizeof (SMBIOS_STRUCTURE) < Smbios.Raw) {
+      return EFI_INVALID_PARAMETER;
+    }
+    //
+    // Check for end marker
+    //
+    if (Smbios.Hdr->Type == SMBIOS_TYPE_END_OF_TABLE) {
+      break;
+    }
+    //
+    // Make sure not to access memory beyond SmbiosEnd
+    // Each structure shall be terminated by a double-null (0000h).
+    //
+    if (Smbios.Raw + Smbios.Hdr->Length + 2 * sizeof (UINT8) > SmbiosEnd.Raw ||
+      Smbios.Raw + Smbios.Hdr->Length + 2 * sizeof (UINT8) < Smbios.Raw) {
+      return EFI_INVALID_PARAMETER;
+    }
+    //
+    // Install the table
+    //
+    SmbiosHandle = Smbios.Hdr->Handle;
+    Status = SmbiosAdd (
+               &mPrivateData.Smbios,
+               ImageHandle,
+               &SmbiosHandle,
+               Smbios.Hdr
+               );
+
+    ASSERT_EFI_ERROR (Status);
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+    //
+    // Go to the next SMBIOS structure. Each SMBIOS structure may include 2 parts:
+    // 1. Formatted section; 2. Unformatted string section. So, 2 steps are needed
+    // to skip one SMBIOS structure.
+    //
+
+    //
+    // Step 1: Skip over formatted section.
+    //
+    String = (CHAR8 *) (Smbios.Raw + Smbios.Hdr->Length);
+
+    //
+    // Step 2: Skip over unformatted string section.
+    //
+    do {
+      //
+      // Each string is terminated with a NULL(00h) BYTE and the sets of strings
+      // is terminated with an additional NULL(00h) BYTE.
+      //
+      for ( ; *String != 0; String++) {
+        if ((UINTN) String >= (UINTN) SmbiosEnd.Raw - sizeof (UINT8)) {
+          return EFI_INVALID_PARAMETER;
+        }
+      }
+
+      if (*(UINT8 *) ++String == 0) {
+        //
+        // Pointer to the next SMBIOS structure.
+        //
+        Smbios.Raw = (UINT8 *) ++String;
+        break;
+      }
+    } while (TRUE);
+  } while (Smbios.Raw < SmbiosEnd.Raw);
+
+  return EFI_SUCCESS;
+}
+
+
+IS_SMBIOS_TABLE_VALID_ENTRY mIsSmbiosTableValid[] = {
+  {&gPldSmbios3TableGuid, IsValidSmbios30Table },
+  {&gPldSmbiosTableGuid,  IsValidSmbios20Table }
+};
+
+/**
+  Retrieve SMBIOS from Hob.
+  @param ImageHandle     Module's image handle
+
+  @retval EFI_SUCCESS    Smbios from Hob is installed.
+  @return EFI_NOT_FOUND  Not found Smbios from Hob.
+  @retval Other          No Smbios from Hob is installed.
+
+**/
+EFI_STATUS
+RetrieveSmbiosFromHob (
+  IN EFI_HANDLE           ImageHandle
+  )
+{
+  EFI_STATUS                    Status;
+  UINTN                         Index;
+  SMBIOS_STRUCTURE_POINTER      Smbios;
+  EFI_HOB_GUID_TYPE             *GuidHob;
+  PLD_SMBIOS_TABLE              *SmBiosTableAdress;
+  PLD_GENERIC_HEADER            *GenericHeader;
+  VOID                          *TableAddress;
+  UINTN                         TableMaximumSize;
+
+  Status = EFI_NOT_FOUND;
+
+  for (Index = 0; Index < ARRAY_SIZE (mIsSmbiosTableValid); Index++) {
+    GuidHob = GetFirstGuidHob (mIsSmbiosTableValid[Index].Guid);
+    if (GuidHob == NULL) {
+      continue;
+    }
+    GenericHeader = (PLD_GENERIC_HEADER *) GET_GUID_HOB_DATA (GuidHob);
+    if ((sizeof (PLD_GENERIC_HEADER) <= GET_GUID_HOB_DATA_SIZE (GuidHob)) && (GenericHeader->Length <= GET_GUID_HOB_DATA_SIZE (GuidHob))) {
+      if (GenericHeader->Revision == PLD_SMBIOS_TABLE_REVISION) {
+        //
+        // PLD_SMBIOS_TABLE structure is used when Revision equals to PLD_SMBIOS_TABLE_REVISION
+        //
+        SmBiosTableAdress = (PLD_SMBIOS_TABLE *) GET_GUID_HOB_DATA (GuidHob);
+        if (GenericHeader->Length >= PLD_SIZEOF_THROUGH_FIELD (PLD_SMBIOS_TABLE, SmBiosEntryPoint)) {
+          if (mIsSmbiosTableValid[Index].IsValid ((VOID *) (UINTN )SmBiosTableAdress->SmBiosEntryPoint, &TableAddress, &TableMaximumSize)) {
+            Smbios.Raw = TableAddress;
+            Status = ParseAndAddExistingSmbiosTable (ImageHandle, Smbios, TableMaximumSize);
+            if (EFI_ERROR (Status)) {
+              DEBUG ((DEBUG_ERROR, "RetrieveSmbiosFromHob: Failed to parse preinstalled tables from gPldSmbios3TableGuid Guid Hob\n"));
+              Status = EFI_UNSUPPORTED;
+            } else {
+              return EFI_SUCCESS;
+            }
+          }
+        }
+      }
+    }
+  }
+  return Status;
+}
+
 /**
 
   Driver to produce Smbios protocol and pre-allocate 1 page for the final SMBIOS table.
@@ -1451,5 +1766,6 @@ SmbiosDriverEntryPoint (
                   &mPrivateData.Smbios
                   );
 
-  return Status;
+  RetrieveSmbiosFromHob (ImageHandle);
+  return EFI_SUCCESS;
 }
diff --git a/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.h b/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.h
index f97c85ae40..a260cf695e 100644
--- a/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.h
+++ b/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.h
@@ -1,7 +1,7 @@
 /** @file
   This code supports the implementation of the Smbios protocol
 
-Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2009 - 2021, Intel Corporation. All rights reserved.<BR>
 SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -24,6 +24,8 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include <Library/MemoryAllocationLib.h>
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/PcdLib.h>
+#include <Library/HobLib.h>
+#include <UniversalPayload/SmbiosTable.h>
 
 #define SMBIOS_INSTANCE_SIGNATURE SIGNATURE_32 ('S', 'B', 'i', 's')
 typedef struct {
diff --git a/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf b/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
index f6c036e1dc..63f468936d 100644
--- a/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+++ b/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
@@ -1,7 +1,7 @@
 ## @file
 # This driver initializes and installs the SMBIOS protocol, constructs SMBIOS table into system configuration table.
 #
-# Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2009 - 2021, Intel Corporation. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -41,6 +41,7 @@
   UefiDriverEntryPoint
   DebugLib
   PcdLib
+  HobLib
 
 [Protocols]
   gEfiSmbiosProtocolGuid                            ## PRODUCES
@@ -48,6 +49,8 @@
 [Guids]
   gEfiSmbiosTableGuid                               ## SOMETIMES_PRODUCES ## SystemTable
   gEfiSmbios3TableGuid                              ## SOMETIMES_PRODUCES ## SystemTable
+  gPldSmbios3TableGuid                              ## CONSUMES           ## HOB
+  gPldSmbiosTableGuid                               ## SOMETIMES_CONSUMES ## HOB
 
 [Pcd]
   gEfiMdeModulePkgTokenSpaceGuid.PcdSmbiosVersion   ## CONSUMES
-- 
2.30.0.windows.2