MIPS: Emulate the new MIPS R6 branch compact (BC) instruction

MIPS R6 uses the <R6 LWC2 opcode for the new BC instruction.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c
index cd880b91f092..1a0a30e16684 100644
--- a/arch/mips/kernel/branch.c
+++ b/arch/mips/kernel/branch.c
@@ -780,6 +780,15 @@ int __compute_return_epc_for_insn(struct pt_regs *regs,
                         epc += 8;
                 regs->cp0_epc = epc;
                 break;
+#else
+        case bc6_op:
+                /* Only valid for MIPS R6 */
+                if (!cpu_has_mips_r6) {
+                        ret = -SIGILL;
+                        break;
+                }
+                regs->cp0_epc += 8;
+                break;
 #endif
         }