isa,cpu: Add support for FS SMT Interrupts

Adds per-thread interrupt controllers and thread/context logic
so that interrupts properly get routed in SMT systems.

1 files changed, 19 insertions, 0 deletions

diff --git a/util/cpt_upgraders/smt-interrupts.py b/util/cpt_upgraders/smt-interrupts.py
new file mode 100644
index 000000000..2c7109c04
--- /dev/null
+++ b/util/cpt_upgraders/smt-interrupts.py
@@ -0,0 +1,19 @@
+# Upgrade single-threaded checkpoints to be properly supported with SMT.
+# SMT adds per-thread interrupts.  Thus we must move the interrupt status
+# from the CPU and into the execution context.
+def upgrader(cpt):
+    for sec in cpt.sections():
+        import re
+
+        re_cpu_match = re.match('^(.*sys.*\.cpu[^._]*)$', sec)
+        if re_cpu_match != None:
+            interrupts = cpt.get(sec, 'interrupts')
+            intStatus = cpt.get(sec, 'intStatus')
+
+            cpu_name = re_cpu_match.group(1)
+
+            cpt.set(cpu_name + ".xc.0", 'interrupts', interrupts)
+            cpt.set(cpu_name + ".xc.0", 'intStatus', intStatus)
+
+            cpt.remove_option(sec, 'interrupts')
+            cpt.remove_option(sec, 'intStatus')