cpu: Query CPU for inst executed from Python

This patch adds the ability for the simulator to query the number of
instructions a CPU has executed so far per hw-thread. This can be used
to enable more flexible periodic events such as taking checkpoints
starting 1s into simulation and X instructions thereafter.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/cpu/base.cc b/src/cpu/base.cc
index 22fca4dc5..624843f42 100644
--- a/src/cpu/base.cc
+++ b/src/cpu/base.cc
@@ -691,6 +691,12 @@ BaseCPU::scheduleInstStop(ThreadID tid, Counter insts, const char *cause)
     comInstEventQueue[tid]->schedule(event, now + insts);
 }
 
+uint64_t
+BaseCPU::getCurrentInstCount(ThreadID tid)
+{
+    return Tick(comInstEventQueue[tid]->getCurTick());
+}
+
 AddressMonitor::AddressMonitor() {
     armed = false;
     waiting = false;