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path: root/drivers/idle/intel_idle.c
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Diffstat (limited to 'drivers/idle/intel_idle.c')
-rw-r--r--drivers/idle/intel_idle.c122
1 files changed, 92 insertions, 30 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 146eed70b..c6935de42 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -660,6 +660,35 @@ static struct cpuidle_state skl_cstates[] = {
.enter = NULL }
};
+static struct cpuidle_state skx_cstates[] = {
+ {
+ .name = "C1-SKX",
+ .desc = "MWAIT 0x00",
+ .flags = MWAIT2flg(0x00),
+ .exit_latency = 2,
+ .target_residency = 2,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
+ {
+ .name = "C1E-SKX",
+ .desc = "MWAIT 0x01",
+ .flags = MWAIT2flg(0x01),
+ .exit_latency = 10,
+ .target_residency = 20,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
+ {
+ .name = "C6-SKX",
+ .desc = "MWAIT 0x20",
+ .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 133,
+ .target_residency = 600,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
+ {
+ .enter = NULL }
+};
+
static struct cpuidle_state atom_cstates[] = {
{
.name = "C1E-ATM",
@@ -716,6 +745,26 @@ static struct cpuidle_state avn_cstates[] = {
{
.enter = NULL }
};
+static struct cpuidle_state knl_cstates[] = {
+ {
+ .name = "C1-KNL",
+ .desc = "MWAIT 0x00",
+ .flags = MWAIT2flg(0x00),
+ .exit_latency = 1,
+ .target_residency = 2,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze },
+ {
+ .name = "C6-KNL",
+ .desc = "MWAIT 0x10",
+ .flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 120,
+ .target_residency = 500,
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze },
+ {
+ .enter = NULL }
+};
/**
* intel_idle
@@ -798,8 +847,11 @@ static int cpu_hotplug_notify(struct notifier_block *n,
* driver in this case
*/
dev = per_cpu_ptr(intel_idle_cpuidle_devices, hotcpu);
- if (!dev->registered)
- intel_idle_cpu_init(hotcpu);
+ if (dev->registered)
+ break;
+
+ if (intel_idle_cpu_init(hotcpu))
+ return NOTIFY_BAD;
break;
}
@@ -884,12 +936,20 @@ static const struct idle_cpu idle_cpu_skl = {
.disable_promotion_to_c1e = true,
};
+static const struct idle_cpu idle_cpu_skx = {
+ .state_table = skx_cstates,
+ .disable_promotion_to_c1e = true,
+};
static const struct idle_cpu idle_cpu_avn = {
.state_table = avn_cstates,
.disable_promotion_to_c1e = true,
};
+static const struct idle_cpu idle_cpu_knl = {
+ .state_table = knl_cstates,
+};
+
#define ICPU(model, cpu) \
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
@@ -921,6 +981,10 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = {
ICPU(0x56, idle_cpu_bdw),
ICPU(0x4e, idle_cpu_skl),
ICPU(0x5e, idle_cpu_skl),
+ ICPU(0x8e, idle_cpu_skl),
+ ICPU(0x9e, idle_cpu_skl),
+ ICPU(0x55, idle_cpu_skx),
+ ICPU(0x57, idle_cpu_knl),
{}
};
MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);
@@ -962,22 +1026,15 @@ static int __init intel_idle_probe(void)
icpu = (const struct idle_cpu *)id->driver_data;
cpuidle_state_table = icpu->state_table;
- if (boot_cpu_has(X86_FEATURE_ARAT)) /* Always Reliable APIC Timer */
- lapic_timer_reliable_states = LAPIC_TIMER_ALWAYS_RELIABLE;
- else
- on_each_cpu(__setup_broadcast_timer, (void *)true, 1);
-
pr_debug(PREFIX "v" INTEL_IDLE_VERSION
" model 0x%X\n", boot_cpu_data.x86_model);
- pr_debug(PREFIX "lapic_timer_reliable_states 0x%x\n",
- lapic_timer_reliable_states);
return 0;
}
/*
* intel_idle_cpuidle_devices_uninit()
- * unregister, free cpuidle_devices
+ * Unregisters the cpuidle devices.
*/
static void intel_idle_cpuidle_devices_uninit(void)
{
@@ -988,9 +1045,6 @@ static void intel_idle_cpuidle_devices_uninit(void)
dev = per_cpu_ptr(intel_idle_cpuidle_devices, i);
cpuidle_unregister_device(dev);
}
-
- free_percpu(intel_idle_cpuidle_devices);
- return;
}
/*
@@ -1086,7 +1140,7 @@ static void intel_idle_state_table_update(void)
* intel_idle_cpuidle_driver_init()
* allocate, initialize cpuidle_states
*/
-static int __init intel_idle_cpuidle_driver_init(void)
+static void __init intel_idle_cpuidle_driver_init(void)
{
int cstate;
struct cpuidle_driver *drv = &intel_idle_driver;
@@ -1138,18 +1192,10 @@ static int __init intel_idle_cpuidle_driver_init(void)
drv->state_count += 1;
}
- if (icpu->auto_demotion_disable_flags)
- on_each_cpu(auto_demotion_disable, NULL, 1);
-
if (icpu->byt_auto_demotion_disable_flag) {
wrmsrl(MSR_CC6_DEMOTION_POLICY_CONFIG, 0);
wrmsrl(MSR_MC6_DEMOTION_POLICY_CONFIG, 0);
}
-
- if (icpu->disable_promotion_to_c1e) /* each-cpu is redundant */
- on_each_cpu(c1e_promotion_disable, NULL, 1);
-
- return 0;
}
@@ -1168,7 +1214,6 @@ static int intel_idle_cpu_init(int cpu)
if (cpuidle_register_device(dev)) {
pr_debug(PREFIX "cpuidle_register_device %d failed!\n", cpu);
- intel_idle_cpuidle_devices_uninit();
return -EIO;
}
@@ -1193,40 +1238,51 @@ static int __init intel_idle_init(void)
if (retval)
return retval;
+ intel_idle_cpuidle_devices = alloc_percpu(struct cpuidle_device);
+ if (intel_idle_cpuidle_devices == NULL)
+ return -ENOMEM;
+
intel_idle_cpuidle_driver_init();
retval = cpuidle_register_driver(&intel_idle_driver);
if (retval) {
struct cpuidle_driver *drv = cpuidle_get_driver();
printk(KERN_DEBUG PREFIX "intel_idle yielding to %s",
drv ? drv->name : "none");
+ free_percpu(intel_idle_cpuidle_devices);
return retval;
}
- intel_idle_cpuidle_devices = alloc_percpu(struct cpuidle_device);
- if (intel_idle_cpuidle_devices == NULL)
- return -ENOMEM;
-
cpu_notifier_register_begin();
for_each_online_cpu(i) {
retval = intel_idle_cpu_init(i);
if (retval) {
+ intel_idle_cpuidle_devices_uninit();
cpu_notifier_register_done();
cpuidle_unregister_driver(&intel_idle_driver);
+ free_percpu(intel_idle_cpuidle_devices);
return retval;
}
}
__register_cpu_notifier(&cpu_hotplug_notifier);
+ if (boot_cpu_has(X86_FEATURE_ARAT)) /* Always Reliable APIC Timer */
+ lapic_timer_reliable_states = LAPIC_TIMER_ALWAYS_RELIABLE;
+ else
+ on_each_cpu(__setup_broadcast_timer, (void *)true, 1);
+
cpu_notifier_register_done();
+ pr_debug(PREFIX "lapic_timer_reliable_states 0x%x\n",
+ lapic_timer_reliable_states);
+
return 0;
}
static void __exit intel_idle_exit(void)
{
- intel_idle_cpuidle_devices_uninit();
- cpuidle_unregister_driver(&intel_idle_driver);
+ struct cpuidle_device *dev;
+ int i;
cpu_notifier_register_begin();
@@ -1234,9 +1290,15 @@ static void __exit intel_idle_exit(void)
on_each_cpu(__setup_broadcast_timer, (void *)false, 1);
__unregister_cpu_notifier(&cpu_hotplug_notifier);
+ for_each_possible_cpu(i) {
+ dev = per_cpu_ptr(intel_idle_cpuidle_devices, i);
+ cpuidle_unregister_device(dev);
+ }
+
cpu_notifier_register_done();
- return;
+ cpuidle_unregister_driver(&intel_idle_driver);
+ free_percpu(intel_idle_cpuidle_devices);
}
module_init(intel_idle_init);