ArmVirtPkg: set SMBIOS version in DetectSmbiosVersionLib instead of QemuFwCfgToPcdDxe

This patch de-duplicates the logic added in commit

  ArmVirtPkg: QemuFwCfgToPcdDxe: set SMBIOS entry point version
  dynamically

(git c98da334, SVN r18043) by hooking DetectSmbiosVersionLib into
SmbiosDxe.

Although said commit was supposed to work with SMBIOS 3.0 payloads from
QEMU, in practice that never worked, because the size / signature checks
in SmbiosVersionInitialization() would always fail, due to the SMBIOS 3.0
entry point being structurally different. Therefore this patch doesn't
regress ArmVirtPkg.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Wei Huang <wei@redhat.com>
Suggested-by: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18176 6f19259b-4bc3-4df7-8a09-765794883524

ArmVirtPkg/ArmVirtQemu.dsc

@@ -321,7 +321,10 @@
   #
   # SMBIOS Support
   #
-  MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+  MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf {
+    <LibraryClasses>
+      NULL|OvmfPkg/Library/SmbiosVersionLib/DetectSmbiosVersionLib.inf
+  }
   OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
 
   #

ArmVirtPkg/QemuFwCfgToPcdDxe/QemuFwCfgToPcd.c

@@ -19,48 +19,9 @@
 #include <Uefi/UefiBaseType.h>
 #include <Uefi/UefiSpec.h>
 
-#include <IndustryStandard/SmBios.h>
-
-#include <Library/BaseMemoryLib.h>
-#include <Library/DebugLib.h>
 #include <Library/PcdLib.h>
 #include <Library/QemuFwCfgLib.h>
 
-
-/**
-  Set the SMBIOS entry point version for the generic SmbiosDxe driver.
-**/
-STATIC
-VOID
-SmbiosVersionInitialization (
-  VOID
-  )
-{
-  FIRMWARE_CONFIG_ITEM     Anchor;
-  UINTN                    AnchorSize;
-  SMBIOS_TABLE_ENTRY_POINT QemuAnchor;
-  UINT16                   SmbiosVersion;
-
-  if (RETURN_ERROR (QemuFwCfgFindFile ("etc/smbios/smbios-anchor", &Anchor,
-                      &AnchorSize)) ||
-      AnchorSize != sizeof QemuAnchor) {
-    return;
-  }
-
-  QemuFwCfgSelectItem (Anchor);
-  QemuFwCfgReadBytes (AnchorSize, &QemuAnchor);
-  if (CompareMem (QemuAnchor.AnchorString, "_SM_", 4) != 0 ||
-      CompareMem (QemuAnchor.IntermediateAnchorString, "_DMI_", 5) != 0) {
-    return;
-  }
-
-  SmbiosVersion = (UINT16)(QemuAnchor.MajorVersion << 8 |
-                           QemuAnchor.MinorVersion);
-  DEBUG ((EFI_D_INFO, "%a: SMBIOS version from QEMU: 0x%04x\n", __FUNCTION__,
-    SmbiosVersion));
-  PcdSet16 (PcdSmbiosVersion, SmbiosVersion);
-}
-
 EFI_STATUS
 EFIAPI
 ParseQemuFwCfgToPcd (
@@ -68,6 +29,5 @@ ParseQemuFwCfgToPcd (
   IN EFI_SYSTEM_TABLE *SystemTable
   )
 {
-  SmbiosVersionInitialization ();
   return EFI_SUCCESS;
 }

ArmVirtPkg/QemuFwCfgToPcdDxe/QemuFwCfgToPcd.inf

@@ -29,18 +29,14 @@
 
 [Packages]
   MdePkg/MdePkg.dec
-  MdeModulePkg/MdeModulePkg.dec
   OvmfPkg/OvmfPkg.dec
 
 [LibraryClasses]
-  BaseMemoryLib
-  DebugLib
   PcdLib
   QemuFwCfgLib
   UefiDriverEntryPoint
 
 [Pcd]
-  gEfiMdeModulePkgTokenSpaceGuid.PcdSmbiosVersion
 
 [Depex]
   TRUE