configs-arm: enable PMU instantiation in CpuCluster

This patch adds a new method to the CpuCluster object
which allows passing the PMU interrupt numbers and events
to record for each core.
This lets users create CPU clusters with PMUs.

Change-Id: Id49fd0aee50f49e4c6fca95e4ee673da3dca73cd
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/22848
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/configs/example/arm/devices.py b/configs/example/arm/devices.py
index 4615daac2..02b9bd7f0 100644
--- a/configs/example/arm/devices.py
+++ b/configs/example/arm/devices.py
@@ -159,6 +159,31 @@ class CpuCluster(SubSystem):
             cpu.connectAllPorts(self.toL2Bus)
         self.toL2Bus.master = self.l2.cpu_side
 
+    def addPMUs(self, ints, events=[]):
+        """
+        Instantiates 1 ArmPMU per PE. The method is accepting a list of
+        interrupt numbers (ints) used by the PMU and a list of events to
+        register in it.
+
+        :param ints: List of interrupt numbers. The code will iterate over
+            the cpu list in order and will assign to every cpu in the cluster
+            a PMU with the matching interrupt.
+        :type ints: List[int]
+        :param events: Additional events to be measured by the PMUs
+        :type events: List[Union[ProbeEvent, SoftwareIncrement]]
+        """
+        assert len(ints) == len(self.cpus)
+        for cpu, pint in zip(self.cpus, ints):
+            int_cls = ArmPPI if pint < 32 else ArmSPI
+            for isa in cpu.isa:
+                isa.pmu = ArmPMU(interrupt=int_cls(num=pint))
+                isa.pmu.addArchEvents(cpu=cpu, itb=cpu.itb, dtb=cpu.dtb,
+                                      icache=getattr(cpu, 'icache', None),
+                                      dcache=getattr(cpu, 'dcache', None),
+                                      l2cache=getattr(self, 'l2', None))
+                for ev in events:
+                    isa.pmu.addEvent(ev)
+
     def connectMemSide(self, bus):
         bus.slave
         try: