1 files changed, 63 insertions, 8 deletions

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index ff9f7010097d..8ac3f721d235 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -57,7 +57,6 @@
 #define DBG(fmt...)
 #endif
 
-int smp_hw_index[NR_CPUS];
 struct thread_info *secondary_ti;
 
 cpumask_t cpu_possible_map = CPU_MASK_NONE;
@@ -123,6 +122,65 @@ void smp_message_recv(int msg)
         }
 }
 
+static irqreturn_t call_function_action(int irq, void *data)
+{
+        generic_smp_call_function_interrupt();
+        return IRQ_HANDLED;
+}
+
+static irqreturn_t reschedule_action(int irq, void *data)
+{
+        /* we just need the return path side effect of checking need_resched */
+        return IRQ_HANDLED;
+}
+
+static irqreturn_t call_function_single_action(int irq, void *data)
+{
+        generic_smp_call_function_single_interrupt();
+        return IRQ_HANDLED;
+}
+
+static irqreturn_t debug_ipi_action(int irq, void *data)
+{
+        smp_message_recv(PPC_MSG_DEBUGGER_BREAK);
+        return IRQ_HANDLED;
+}
+
+static irq_handler_t smp_ipi_action[] = {
+        [PPC_MSG_CALL_FUNCTION] =  call_function_action,
+        [PPC_MSG_RESCHEDULE] = reschedule_action,
+        [PPC_MSG_CALL_FUNC_SINGLE] = call_function_single_action,
+        [PPC_MSG_DEBUGGER_BREAK] = debug_ipi_action,
+};
+
+const char *smp_ipi_name[] = {
+        [PPC_MSG_CALL_FUNCTION] =  "ipi call function",
+        [PPC_MSG_RESCHEDULE] = "ipi reschedule",
+        [PPC_MSG_CALL_FUNC_SINGLE] = "ipi call function single",
+        [PPC_MSG_DEBUGGER_BREAK] = "ipi debugger",
+};
+
+/* optional function to request ipi, for controllers with >= 4 ipis */
+int smp_request_message_ipi(int virq, int msg)
+{
+        int err;
+
+        if (msg < 0 || msg > PPC_MSG_DEBUGGER_BREAK) {
+                return -EINVAL;
+        }
+#if !defined(CONFIG_DEBUGGER) && !defined(CONFIG_KEXEC)
+        if (msg == PPC_MSG_DEBUGGER_BREAK) {
+                return 1;
+        }
+#endif
+        err = request_irq(virq, smp_ipi_action[msg], IRQF_DISABLED|IRQF_PERCPU,
+                          smp_ipi_name[msg], 0);
+        WARN(err < 0, "unable to request_irq %d for %s (rc %d)\n",
+                virq, smp_ipi_name[msg], err);
+
+        return err;
+}
+
 void smp_send_reschedule(int cpu)
 {
         if (likely(smp_ops))
@@ -408,8 +466,7 @@ out:
 static struct device_node *cpu_to_l2cache(int cpu)
 {
         struct device_node *np;
-        const phandle *php;
-        phandle ph;
+        struct device_node *cache;
 
         if (!cpu_present(cpu))
                 return NULL;
@@ -418,13 +475,11 @@ static struct device_node *cpu_to_l2cache(int cpu)
         if (np == NULL)
                 return NULL;
 
-        php = of_get_property(np, "l2-cache", NULL);
-        if (php == NULL)
-                return NULL;
-        ph = *php;
+        cache = of_find_next_cache_node(np);
+
         of_node_put(np);
 
-        return of_find_node_by_phandle(ph);
+        return cache;
 }
 
 /* Activate a secondary processor. */