x86: Timing support for pagetable walker

Move page table walker state to its own object type, and make the
walker instantiate state for each outstanding walk. By storing the
states in a queue, the walker is able to handle multiple outstanding
timing requests. Note that functional walks use separate state
elements.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/arch/x86/tlb.cc b/src/arch/x86/tlb.cc
index 7fa2e172c..a02c5e6a3 100644
--- a/src/arch/x86/tlb.cc
+++ b/src/arch/x86/tlb.cc
@@ -725,6 +725,12 @@ TLB::doMmuRegWrite(ThreadContext *tc, Packet *pkt)
     return tc->getCpuPtr()->ticks(1);
 }
 
+Walker *
+TLB::getWalker()
+{
+    return walker;
+}
+
 #endif
 
 void