1 files changed, 18 insertions, 28 deletions

diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c
index 306643cc9dbc..24f58cb0a543 100644
--- a/arch/powerpc/platforms/pseries/smp.c
+++ b/arch/powerpc/platforms/pseries/smp.c
@@ -43,8 +43,8 @@
 #include <asm/cputhreads.h>
 #include <asm/xics.h>
 #include <asm/dbell.h>
+#include <asm/plpar_wrappers.h>
 
-#include "plpar_wrappers.h"
 #include "pseries.h"
 #include "offline_states.h"
 
@@ -187,22 +187,6 @@ static int smp_pSeries_kick_cpu(int nr)
 	return 0;
 }
 
-static int smp_pSeries_cpu_bootable(unsigned int nr)
-{
-	/* Special case - we inhibit secondary thread startup
-	 * during boot if the user requests it.
-	 */
-	if (system_state == SYSTEM_BOOTING && cpu_has_feature(CPU_FTR_SMT)) {
-		if (!smt_enabled_at_boot && cpu_thread_in_core(nr) != 0)
-			return 0;
-		if (smt_enabled_at_boot
-		    && cpu_thread_in_core(nr) >= smt_enabled_at_boot)
-			return 0;
-	}
-
-	return 1;
-}
-
 /* Only used on systems that support multiple IPI mechanisms */
 static void pSeries_cause_ipi_mux(int cpu, unsigned long data)
 {
@@ -237,7 +221,7 @@ static struct smp_ops_t pSeries_xics_smp_ops = {
 	.probe		= pSeries_smp_probe,
 	.kick_cpu	= smp_pSeries_kick_cpu,
 	.setup_cpu	= smp_xics_setup_cpu,
-	.cpu_bootable	= smp_pSeries_cpu_bootable,
+	.cpu_bootable	= smp_generic_cpu_bootable,
 };
 
 /* This is called very early */
@@ -249,18 +233,24 @@ static void __init smp_init_pseries(void)
 
 	alloc_bootmem_cpumask_var(&of_spin_mask);
 
-	/* Mark threads which are still spinning in hold loops. */
-	if (cpu_has_feature(CPU_FTR_SMT)) {
-		for_each_present_cpu(i) { 
-			if (cpu_thread_in_core(i) == 0)
-				cpumask_set_cpu(i, of_spin_mask);
-		}
-	} else {
-		cpumask_copy(of_spin_mask, cpu_present_mask);
+	/*
+	 * Mark threads which are still spinning in hold loops
+	 *
+	 * We know prom_init will not have started them if RTAS supports
+	 * query-cpu-stopped-state.
+	 */
+	if (rtas_token("query-cpu-stopped-state") == RTAS_UNKNOWN_SERVICE) {
+		if (cpu_has_feature(CPU_FTR_SMT)) {
+			for_each_present_cpu(i) {
+				if (cpu_thread_in_core(i) == 0)
+					cpumask_set_cpu(i, of_spin_mask);
+			}
+		} else
+			cpumask_copy(of_spin_mask, cpu_present_mask);
+
+		cpumask_clear_cpu(boot_cpuid, of_spin_mask);
 	}
 
-	cpumask_clear_cpu(boot_cpuid, of_spin_mask);
-
 	/* Non-lpar has additional take/give timebase */
 	if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) {
 		smp_ops->give_timebase = rtas_give_timebase;