powerpc/pseries: Make query_cpu_stopped callable outside hotplug cpu
This moves query_cpu_stopped() out of the hotplug cpu code and into
smp.c so it can called in other places and renames it to
smp_query_cpu_stopped().
It also cleans up the return values by adding some #defines
Cc: <stable@kernel.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c
index 4e7f89a..20b6942 100644
--- a/arch/powerpc/platforms/pseries/smp.c
+++ b/arch/powerpc/platforms/pseries/smp.c
@@ -57,6 +57,28 @@
*/
static cpumask_t of_spin_map;
+/* Query where a cpu is now. Return codes #defined in plpar_wrappers.h */
+int smp_query_cpu_stopped(unsigned int pcpu)
+{
+ int cpu_status, status;
+ int qcss_tok = rtas_token("query-cpu-stopped-state");
+
+ if (qcss_tok == RTAS_UNKNOWN_SERVICE) {
+ printk(KERN_INFO "Firmware doesn't support "
+ "query-cpu-stopped-state\n");
+ return QCSS_HARDWARE_ERROR;
+ }
+
+ status = rtas_call(qcss_tok, 1, 2, &cpu_status, pcpu);
+ if (status != 0) {
+ printk(KERN_ERR
+ "RTAS query-cpu-stopped-state failed: %i\n", status);
+ return status;
+ }
+
+ return cpu_status;
+}
+
/**
* smp_startup_cpu() - start the given cpu
*