@@ -56,6 +56,7 @@
#include <asm/mwait.h>
#include <asm/spec-ctrl.h>
#include <asm/fpu/api.h>
+#include <asm/smp.h>
#define INTEL_IDLE_VERSION "0.5.1"
@@ -227,6 +228,16 @@ static __cpuidle int intel_idle_s2idle(struct cpuidle_device *dev,
return 0;
}
+static __cpuidle void intel_idle_enter_dead(struct cpuidle_device *dev,
+ int index)
+{
+ struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
+ struct cpuidle_state *state = &drv->states[index];
+ unsigned long eax = flg2MWAIT(state->flags);
+
+ mwait_play_dead_with_hint(eax);
+}
+
/*
* States are indexed by the cstate number,
* which is also the index into the MWAIT hint array.
@@ -1798,6 +1809,7 @@ static void __init intel_idle_init_cstates_acpi(struct cpuidle_driver *drv)
state->flags |= CPUIDLE_FLAG_TIMER_STOP;
state->enter = intel_idle;
+ state->enter_dead = intel_idle_enter_dead;
state->enter_s2idle = intel_idle_s2idle;
}
}
@@ -2143,10 +2155,12 @@ static void __init intel_idle_init_cstates_icpu(struct cpuidle_driver *drv)
if (intel_idle_max_cstate_reached(cstate))
break;
- if (!cpuidle_state_table[cstate].enter &&
- !cpuidle_state_table[cstate].enter_s2idle)
+ if (!cpuidle_state_table[cstate].enter)
break;
+ if (!cpuidle_state_table[cstate].enter_dead)
+ cpuidle_state_table[cstate].enter_dead = intel_idle_enter_dead;
+
/* If marked as unusable, skip this state. */
if (cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_UNUSABLE) {
pr_debug("state %s is disabled\n",
Recent Intel platforms require idle driver to provide information about the MWAIT hint used to enter the deepest idle state in the play_dead code. Provide the default enter_dead() handler for all of the platforms and allow overwriting with a custom handler for each platform if needed. Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com> --- drivers/idle/intel_idle.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-)