1 files changed, 21 insertions, 10 deletions

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index d64feb3ea0be..1f97e2b87a62 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -354,7 +354,7 @@ static int alloc_dispatch_log_kmem_cache(void)
 }
 early_initcall(alloc_dispatch_log_kmem_cache);
 
-static void pSeries_idle(void)
+static void pseries_lpar_idle(void)
 {
         /* This would call on the cpuidle framework, and the back-end pseries
          * driver to  go to idle states
@@ -362,10 +362,22 @@ static void pSeries_idle(void)
         if (cpuidle_idle_call()) {
                 /* On error, execute default handler
                  * to go into low thread priority and possibly
-                 * low power mode.
+                 * low power mode by cedeing processor to hypervisor
                  */
-                HMT_low();
-                HMT_very_low();
+
+                /* Indicate to hypervisor that we are idle. */
+                get_lppaca()->idle = 1;
+
+                /*
+                 * Yield the processor to the hypervisor.  We return if
+                 * an external interrupt occurs (which are driven prior
+                 * to returning here) or if a prod occurs from another
+                 * processor. When returning here, external interrupts
+                 * are enabled.
+                 */
+                cede_processor();
+
+                get_lppaca()->idle = 0;
         }
 }
 
@@ -456,15 +468,14 @@ static void __init pSeries_setup_arch(void)
 
         pSeries_nvram_init();
 
-        if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
+        if (firmware_has_feature(FW_FEATURE_LPAR)) {
                 vpa_init(boot_cpuid);
-                ppc_md.power_save = pSeries_idle;
-        }
-
-        if (firmware_has_feature(FW_FEATURE_LPAR))
+                ppc_md.power_save = pseries_lpar_idle;
                 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
-        else
+        } else {
+                /* No special idle routine */
                 ppc_md.enable_pmcs = power4_enable_pmcs;
+        }
 
         ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;