arch/tile: support backtracing on TILE-Gx

This functionality was stubbed out until recently.  Now we support our
normal backtracing API on TILE-Gx as well as on TILE64/TILEPro.
This change includes a tweak to the instruction encoding caused by
adding addxli for compat mode.

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

1 files changed, 0 insertions, 8 deletions

diff --git a/arch/tile/kernel/stack.c b/arch/tile/kernel/stack.c
index b6268d3ae869..38a68b0b4581 100644
--- a/arch/tile/kernel/stack.c
+++ b/arch/tile/kernel/stack.c
@@ -108,7 +108,6 @@ static bool read_memory_func(void *result, VirtualAddress address,
 /* Return a pt_regs pointer for a valid fault handler frame */
 static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt)
 {
-#ifndef __tilegx__
         const char *fault = NULL;  /* happy compiler */
         char fault_buf[64];
         VirtualAddress sp = kbt->it.sp;
@@ -146,7 +145,6 @@ static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt)
         }
         if (!kbt->profile || (INT_MASK(p->faultnum) & QUEUED_INTERRUPTS) == 0)
                 return p;
-#endif
         return NULL;
 }
 
@@ -351,12 +349,6 @@ void tile_show_stack(struct KBacktraceIterator *kbt, int headers)
                        kbt->task->pid, kbt->task->tgid, kbt->task->comm,
                        smp_processor_id(), get_cycles());
         }
-#ifdef __tilegx__
-        if (kbt->is_current) {
-                __insn_mtspr(SPR_SIM_CONTROL,
-                             SIM_DUMP_SPR_ARG(SIM_DUMP_BACKTRACE));
-        }
-#endif
         kbt->verbose = 1;
         i = 0;
         for (; !KBacktraceIterator_end(kbt); KBacktraceIterator_next(kbt)) {