x86: add tlb checkpointing

This patch adds checkpointing support to x86 tlb. It upgrades the
cpt_upgrader.py script so that previously created checkpoints can
be updated. It moves the checkpoint version to 6.

1 files changed, 2 insertions, 13 deletions

diff --git a/src/arch/x86/pagetable.cc b/src/arch/x86/pagetable.cc
index 40d5e0984..a9ef18129 100644
--- a/src/arch/x86/pagetable.cc
+++ b/src/arch/x86/pagetable.cc
@@ -70,25 +70,14 @@ TlbEntry::unserialize(Checkpoint *cp, const std::string &section)
 {
     UNSERIALIZE_SCALAR(paddr);
     UNSERIALIZE_SCALAR(vaddr);
-    //
-    // The logBytes scalar variable replaced the previous size variable.
-    // The following code maintains backwards compatibility with previous
-    // checkpoints using the old size variable.
-    //
-    if (UNSERIALIZE_OPT_SCALAR(logBytes) == false) {
-        int size;
-        UNSERIALIZE_SCALAR(size);
-        logBytes = log2(size);
-    }
+    UNSERIALIZE_SCALAR(logBytes);
     UNSERIALIZE_SCALAR(writable);
     UNSERIALIZE_SCALAR(user);
     UNSERIALIZE_SCALAR(uncacheable);
     UNSERIALIZE_SCALAR(global);
     UNSERIALIZE_SCALAR(patBit);
     UNSERIALIZE_SCALAR(noExec);
-    if (UNSERIALIZE_OPT_SCALAR(lruSeq) == false) {
-        lruSeq = 0;
-    }
+    UNSERIALIZE_SCALAR(lruSeq);
 }
 
 }