Changeset 85718 in vbox for trunk/src/VBox/Devices/EFI/FirmwareNew/OvmfPkg/SmmAccess/SmramInternal.c

Timestamp:

Aug 12, 2020 4:09:12 PM (5 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

139865

Message:

Devices/EFI: Merge edk-stable202005 and make it build, bugref:4643

Location:

trunk/src/VBox/Devices/EFI/FirmwareNew

Files:

• . (modified) (1 prop)
• OvmfPkg/SmmAccess/SmramInternal.c (modified) (3 diffs)

trunk/src/VBox/Devices/EFI/FirmwareNew/OvmfPkg/SmmAccess/SmramInternal.c

@@ -22 +22 @@
 UINT16 mQ35TsegMbytes;
 
+//
+// The value of PcdQ35SmramAtDefaultSmbase is saved into this variable at
+// module startup.
+//
+STATIC BOOLEAN mQ35SmramAtDefaultSmbase;
+
 /**
   Save PcdQ35TsegMbytes into mQ35TsegMbytes.
@@ -31 +37 @@
 {
   mQ35TsegMbytes = PcdGet16 (PcdQ35TsegMbytes);
+}
+
+/**
+  Save PcdQ35SmramAtDefaultSmbase into mQ35SmramAtDefaultSmbase.
+**/
+VOID
+InitQ35SmramAtDefaultSmbase (
+  VOID
+  )
+{
+  mQ35SmramAtDefaultSmbase = PcdGetBool (PcdQ35SmramAtDefaultSmbase);
 }
 
@@ -125 +142 @@
   PciOr8 (DRAMC_REGISTER_Q35 (MCH_ESMRAMC), MCH_ESMRAMC_T_EN);
   PciOr8 (DRAMC_REGISTER_Q35 (MCH_SMRAM),   MCH_SMRAM_D_LCK);
+
+  //
+  // Close & lock the SMRAM at the default SMBASE, if it exists.
+  //
+  if (mQ35SmramAtDefaultSmbase) {
+    PciWrite8 (DRAMC_REGISTER_Q35 (MCH_DEFAULT_SMBASE_CTL),
+      MCH_DEFAULT_SMBASE_LCK);
+  }
 
   GetStates (LockState, OpenState);