Commit 1ad74998 authored by Tony Breeds's avatar Tony Breeds Committed by Paul Mackerras

[POWERPC] Enable tickless idle and high res timers for powerpc

Signed-off-by: default avatarTony Breeds <tony@bakeyournoodle.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent d831d0b8
...@@ -173,6 +173,7 @@ config HIGHMEM ...@@ -173,6 +173,7 @@ config HIGHMEM
bool "High memory support" bool "High memory support"
depends on PPC32 depends on PPC32
source kernel/time/Kconfig
source kernel/Kconfig.hz source kernel/Kconfig.hz
source kernel/Kconfig.preempt source kernel/Kconfig.preempt
source "fs/Kconfig.binfmt" source "fs/Kconfig.binfmt"
......
...@@ -24,6 +24,7 @@ ...@@ -24,6 +24,7 @@
#include <linux/smp.h> #include <linux/smp.h>
#include <linux/cpu.h> #include <linux/cpu.h>
#include <linux/sysctl.h> #include <linux/sysctl.h>
#include <linux/tick.h>
#include <asm/system.h> #include <asm/system.h>
#include <asm/processor.h> #include <asm/processor.h>
...@@ -59,6 +60,7 @@ void cpu_idle(void) ...@@ -59,6 +60,7 @@ void cpu_idle(void)
set_thread_flag(TIF_POLLING_NRFLAG); set_thread_flag(TIF_POLLING_NRFLAG);
while (1) { while (1) {
tick_nohz_stop_sched_tick();
while (!need_resched() && !cpu_should_die()) { while (!need_resched() && !cpu_should_die()) {
ppc64_runlatch_off(); ppc64_runlatch_off();
...@@ -90,6 +92,7 @@ void cpu_idle(void) ...@@ -90,6 +92,7 @@ void cpu_idle(void)
HMT_medium(); HMT_medium();
ppc64_runlatch_on(); ppc64_runlatch_on();
tick_nohz_restart_sched_tick();
if (cpu_should_die()) if (cpu_should_die())
cpu_die(); cpu_die();
preempt_enable_no_resched(); preempt_enable_no_resched();
......
...@@ -26,6 +26,8 @@ ...@@ -26,6 +26,8 @@
#include <linux/major.h> #include <linux/major.h>
#include <linux/root_dev.h> #include <linux/root_dev.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/hrtimer.h>
#include <linux/tick.h>
#include <asm/processor.h> #include <asm/processor.h>
#include <asm/machdep.h> #include <asm/machdep.h>
...@@ -561,6 +563,7 @@ static void yield_shared_processor(void) ...@@ -561,6 +563,7 @@ static void yield_shared_processor(void)
static void iseries_shared_idle(void) static void iseries_shared_idle(void)
{ {
while (1) { while (1) {
tick_nohz_stop_sched_tick();
while (!need_resched() && !hvlpevent_is_pending()) { while (!need_resched() && !hvlpevent_is_pending()) {
local_irq_disable(); local_irq_disable();
ppc64_runlatch_off(); ppc64_runlatch_off();
...@@ -574,6 +577,7 @@ static void iseries_shared_idle(void) ...@@ -574,6 +577,7 @@ static void iseries_shared_idle(void)
} }
ppc64_runlatch_on(); ppc64_runlatch_on();
tick_nohz_restart_sched_tick();
if (hvlpevent_is_pending()) if (hvlpevent_is_pending())
process_iSeries_events(); process_iSeries_events();
...@@ -589,6 +593,7 @@ static void iseries_dedicated_idle(void) ...@@ -589,6 +593,7 @@ static void iseries_dedicated_idle(void)
set_thread_flag(TIF_POLLING_NRFLAG); set_thread_flag(TIF_POLLING_NRFLAG);
while (1) { while (1) {
tick_nohz_stop_sched_tick();
if (!need_resched()) { if (!need_resched()) {
while (!need_resched()) { while (!need_resched()) {
ppc64_runlatch_off(); ppc64_runlatch_off();
...@@ -605,6 +610,7 @@ static void iseries_dedicated_idle(void) ...@@ -605,6 +610,7 @@ static void iseries_dedicated_idle(void)
} }
ppc64_runlatch_on(); ppc64_runlatch_on();
tick_nohz_restart_sched_tick();
preempt_enable_no_resched(); preempt_enable_no_resched();
schedule(); schedule();
preempt_disable(); preempt_disable();
......
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