OvmfPkg: Set default Pci PCDs in Tdx guest

In previous implementation below Pci related PCDs were set based on the
ResourceDescriptor passed in TdHob.
 - PcdPciMmio64Base / PcdPciMmio64Size
 - PcdPciMmio32Base / PcdPciMmio32Size
 - PcdPciIoBase / PcdPciIoSize

The PCDs will not be set if TdHob doesn't include these information. This
patch set the PCDs with the information initialized in PlatformInitLib
by default. Then TdxDxe will check the ResourceDescriptor in TdHob and
reset them if they're included.

Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

Author: mxu9

OvmfPkg/TdxDxe/TdxDxe.c

@@ -68,20 +68,20 @@ SetPcdSettings (
     PcdStatus = PcdSet64S (PcdTdxSharedBitMask, TdSharedPageMask ());
     ASSERT_RETURN_ERROR (PcdStatus);
     DEBUG ((DEBUG_INFO, "TdxSharedBitMask=0x%llx\n", PcdGet64 (PcdTdxSharedBitMask)));
-  } else {
-    PcdStatus = PcdSet64S (PcdPciMmio64Base, PlatformInfoHob->PcdPciMmio64Base);
-    ASSERT_RETURN_ERROR (PcdStatus);
-    PcdStatus = PcdSet64S (PcdPciMmio64Size, PlatformInfoHob->PcdPciMmio64Size);
-    ASSERT_RETURN_ERROR (PcdStatus);
-    PcdStatus = PcdSet64S (PcdPciMmio32Base, PlatformInfoHob->PcdPciMmio32Base);
-    ASSERT_RETURN_ERROR (PcdStatus);
-    PcdStatus = PcdSet64S (PcdPciMmio32Size, PlatformInfoHob->PcdPciMmio32Size);
-    ASSERT_RETURN_ERROR (PcdStatus);
-    PcdStatus = PcdSet64S (PcdPciIoBase, PlatformInfoHob->PcdPciIoBase);
-    ASSERT_RETURN_ERROR (PcdStatus);
-    PcdStatus = PcdSet64S (PcdPciIoSize, PlatformInfoHob->PcdPciIoSize);
-    ASSERT_RETURN_ERROR (PcdStatus);
   }
+
+  PcdStatus = PcdSet64S (PcdPciMmio64Base, PlatformInfoHob->PcdPciMmio64Base);
+  ASSERT_RETURN_ERROR (PcdStatus);
+  PcdStatus = PcdSet64S (PcdPciMmio64Size, PlatformInfoHob->PcdPciMmio64Size);
+  ASSERT_RETURN_ERROR (PcdStatus);
+  PcdStatus = PcdSet64S (PcdPciMmio32Base, PlatformInfoHob->PcdPciMmio32Base);
+  ASSERT_RETURN_ERROR (PcdStatus);
+  PcdStatus = PcdSet64S (PcdPciMmio32Size, PlatformInfoHob->PcdPciMmio32Size);
+  ASSERT_RETURN_ERROR (PcdStatus);
+  PcdStatus = PcdSet64S (PcdPciIoBase, PlatformInfoHob->PcdPciIoBase);
+  ASSERT_RETURN_ERROR (PcdStatus);
+  PcdStatus = PcdSet64S (PcdPciIoSize, PlatformInfoHob->PcdPciIoSize);
+  ASSERT_RETURN_ERROR (PcdStatus);
 }
 
 /**