powerpc: Add transactional memory unavaliable execption handler

[mirror_ubuntu-zesty-kernel.git] / arch / powerpc / kernel / traps.c

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index bd5de5deaf5157b1991b5b970427c691539a1287..f829e05d8b1b68cda113718d7af62dfbaece9bf3 100644 (file)
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1168,6 +1168,27 @@ void vsx_unavailable_exception(struct pt_regs *regs)
        die("Unrecoverable VSX Unavailable Exception", regs, SIGABRT);
 }
 
+void tm_unavailable_exception(struct pt_regs *regs)
+{
+       /* We restore the interrupt state now */
+       if (!arch_irq_disabled_regs(regs))
+               local_irq_enable();
+
+       /* Currently we never expect a TMU exception.  Catch
+        * this and kill the process!
+        */
+       printk(KERN_EMERG "Unexpected TM unavailable exception at %lx "
+              "(msr %lx)\n",
+              regs->nip, regs->msr);
+
+       if (user_mode(regs)) {
+               _exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
+               return;
+       }
+
+       die("Unexpected TM unavailable exception", regs, SIGABRT);
+}
+
 void performance_monitor_exception(struct pt_regs *regs)
 {
        __get_cpu_var(irq_stat).pmu_irqs++;