OvmfPkg/Library/HardwareInfoLib: Fix memory allocation at PciHostBrid…

…geUtilityGetRootBridgesHostProvided

Currently, PciHostBridgeUtilityGetRootBridgesHostProvided allocates memory for aperture structures without clearing memory. This causes garbage in the Translation field, but the Base and Limit fields have the correct values because they are copied from the HOST_BRIDGE_INFO fields in the HardwareInfoPciHostBridgeHostBridgeHostBridgeGetApertures function.

RootBridge: PciRoot(0x0)
  Support/Attr: 70069 / 70069
    DmaAbove4G: No
NoExtConfSpace: No
     AllocAttr: 3 (CombineMemPMem Mem64Decode)
           Bus: 0 - 80 Translation=0
            Io: 6000 - FFFF Translation=5E9EB018
           Mem: 80000000 - DFFFFFFF Translation=0
    MemAbove4G: 600000000000 - 7FFFFFFFFFFF Translation=0
          PMem: FFFFFFFFFFFFFFFF - 0 Translation=0
   PMemAbove4G: FFFFFFFFFFFFFFFF - 0 Translation=0

Cc: Alexander Graf <[email protected]>
Cc: Gerd Hoffmann <[email protected]>
Signed-off-by: Alexander Gryanko [email protected]

OvmfPkg/Library/PciHostBridgeUtilityLib/PciHostBridgeUtilityLib.c

@@ -444,6 +444,12 @@ PciHostBridgeUtilityGetRootBridgesHostProvided (
   PCI_ROOT_BRIDGE_APERTURE  PMem;
   PCI_ROOT_BRIDGE_APERTURE  PMemAbove4G;
 
+  ZeroMem (&Io, sizeof (Io));
+  ZeroMem (&Mem, sizeof (Mem));
+  ZeroMem (&MemAbove4G, sizeof (MemAbove4G));
+  ZeroMem (&PMem, sizeof (PMem));
+  ZeroMem (&PMemAbove4G, sizeof (PMemAbove4G));
+
   //
   // Initialize the Hardware Info list head to start with an empty but valid
   // list head.