tilegx: support KGDB

Enter kernel debugger at boot with:
  --hvd UART_1=1 --hvx kgdbwait --hvx kgdboc=ttyS1,115200
or at runtime with:
  echo ttyS1,115200 > /sys/module/kgdboc/parameters/kgdboc
  echo g > /proc/sysrq-trigger

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/tile/kernel/traps.c b/arch/tile/kernel/traps.c
index 628661f6a929..a937365b3429 100644
--- a/arch/tile/kernel/traps.c
+++ b/arch/tile/kernel/traps.c
@@ -240,6 +240,11 @@ static int do_bpt(struct pt_regs *regs)
                 notify_die(DIE_BREAK, "debug", regs, bundle,
                         INT_ILL, SIGTRAP);
                 break;
+        /* compiled_bpt */
+        case DIE_COMPILED_BPT:
+                notify_die(DIE_COMPILED_BPT, "debug", regs, bundle,
+                        INT_ILL, SIGTRAP);
+                break;
         /* breakpoint2_insn */
         case DIE_SSTEPBP:
                 notify_die(DIE_SSTEPBP, "single_step", regs, bundle,