arm: Enable support for triggering a sim panic on kernel panics

Add the options 'panic_on_panic' and 'panic_on_oops' to the
LinuxArmSystem SimObject. When these option are enabled, the simulator
panics when the guest kernel panics or oopses. Enable panic on panic
and panic on oops in ARM-based test cases.

3 files changed, 23 insertions, 5 deletions

diff --git a/src/arch/arm/ArmSystem.py b/src/arch/arm/ArmSystem.py
index 763b043dc..b48c2a29d 100644
--- a/src/arch/arm/ArmSystem.py
+++ b/src/arch/arm/ArmSystem.py
@@ -68,3 +68,8 @@ class LinuxArmSystem(ArmSystem):
     early_kernel_symbols = Param.Bool(False,
         "enable early kernel symbol tables before MMU")
     enable_context_switch_stats_dump = Param.Bool(False, "enable stats/task info dumping at context switch boundaries")
+
+    panic_on_panic = Param.Bool(False, "Trigger a gem5 panic if the " \
+                                    "guest kernel panics")
+    panic_on_oops = Param.Bool(False, "Trigger a gem5 panic if the " \
+                                   "guest kernel oopses")
diff --git a/src/arch/arm/linux/system.cc b/src/arch/arm/linux/system.cc
index de4c27d8b..e714cc913 100644
--- a/src/arch/arm/linux/system.cc
+++ b/src/arch/arm/linux/system.cc
@@ -62,11 +62,22 @@ using namespace Linux;
 
 LinuxArmSystem::LinuxArmSystem(Params *p)
     : ArmSystem(p),
-      enableContextSwitchStatsDump(p->enable_context_switch_stats_dump)
+      enableContextSwitchStatsDump(p->enable_context_switch_stats_dump),
+      kernelPanicEvent(NULL), kernelOopsEvent(NULL)
 {
+    if (p->panic_on_panic) {
+        kernelPanicEvent = addKernelFuncEventOrPanic<PanicPCEvent>(
+            "panic", "Kernel panic in simulated kernel");
+    } else {
 #ifndef NDEBUG
-    kernelPanicEvent = addKernelFuncEventOrPanic<BreakPCEvent>("panic");
+        kernelPanicEvent = addKernelFuncEventOrPanic<BreakPCEvent>("panic");
 #endif
+    }
+
+    if (p->panic_on_oops) {
+        kernelOopsEvent = addKernelFuncEventOrPanic<PanicPCEvent>(
+            "oops_exit", "Kernel oops in guest");
+    }
 
     // With ARM udelay() is #defined to __udelay
     uDelaySkipEvent = addKernelFuncEventOrPanic<UDelayEvent>(
diff --git a/src/arch/arm/linux/system.hh b/src/arch/arm/linux/system.hh
index feed8cfaa..008c64429 100644
--- a/src/arch/arm/linux/system.hh
+++ b/src/arch/arm/linux/system.hh
@@ -98,10 +98,12 @@ class LinuxArmSystem : public ArmSystem
     void mapPid(ThreadContext* tc, uint32_t pid);
 
   private:
-#ifndef NDEBUG
     /** Event to halt the simulator if the kernel calls panic()  */
-    BreakPCEvent *kernelPanicEvent;
-#endif
+    PCEvent *kernelPanicEvent;
+
+    /** Event to halt the simulator if the kernel calls oopses  */
+    PCEvent *kernelOopsEvent;
+
     /**
      * PC based event to skip udelay(<time>) calls and quiesce the
      * processor for the appropriate amount of time. This is not functionally