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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-06 10:02:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-06 10:02:58 -0700
commita5e11599da95fbe8425db0cfd01a581d7412d0c9 (patch)
tree45fccb4b27a1068cec8dc8283260893b60ca46d2 /arch/x86/kernel/cpu
parent0f477dd0851bdcee82923da66a7fc4a44cb1bc3d (diff)
parenta3159864f2978bf2ace9cc787d73d315c98bbf9a (diff)
Merge branch 'x86-hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, hwmon: Package Level Thermal/Power: pkgtemp documentation x86, hwmon: Package Level Thermal/Power: power limit x86, hwmon: Package Level Thermal/Power: thermal throttling handler x86, hwmon: Package Level Thermal/Power: pkgtemp hwmon driver
Diffstat (limited to 'arch/x86/kernel/cpu')
-rw-r--r--arch/x86/kernel/cpu/mcheck/therm_throt.c206
1 files changed, 167 insertions, 39 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index e1a0a3bf9716..c2a8b26d4fea 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -34,15 +34,25 @@
/* How long to wait between reporting thermal events */
#define CHECK_INTERVAL (300 * HZ)
+#define THERMAL_THROTTLING_EVENT 0
+#define POWER_LIMIT_EVENT 1
+
/*
- * Current thermal throttling state:
+ * Current thermal event state:
*/
-struct thermal_state {
- bool is_throttled;
-
+struct _thermal_state {
+ bool new_event;
+ int event;
u64 next_check;
- unsigned long throttle_count;
- unsigned long last_throttle_count;
+ unsigned long count;
+ unsigned long last_count;
+};
+
+struct thermal_state {
+ struct _thermal_state core_throttle;
+ struct _thermal_state core_power_limit;
+ struct _thermal_state package_throttle;
+ struct _thermal_state package_power_limit;
};
static DEFINE_PER_CPU(struct thermal_state, thermal_state);
@@ -53,11 +63,13 @@ static u32 lvtthmr_init __read_mostly;
#ifdef CONFIG_SYSFS
#define define_therm_throt_sysdev_one_ro(_name) \
- static SYSDEV_ATTR(_name, 0444, therm_throt_sysdev_show_##_name, NULL)
+ static SYSDEV_ATTR(_name, 0444, \
+ therm_throt_sysdev_show_##_name, \
+ NULL) \
-#define define_therm_throt_sysdev_show_func(name) \
+#define define_therm_throt_sysdev_show_func(event, name) \
\
-static ssize_t therm_throt_sysdev_show_##name( \
+static ssize_t therm_throt_sysdev_show_##event##_##name( \
struct sys_device *dev, \
struct sysdev_attribute *attr, \
char *buf) \
@@ -66,30 +78,42 @@ static ssize_t therm_throt_sysdev_show_##name( \
ssize_t ret; \
\
preempt_disable(); /* CPU hotplug */ \
- if (cpu_online(cpu)) \
+ if (cpu_online(cpu)) { \
ret = sprintf(buf, "%lu\n", \
- per_cpu(thermal_state, cpu).name); \
- else \
+ per_cpu(thermal_state, cpu).event.name); \
+ } else \
ret = 0; \
preempt_enable(); \
\
return ret; \
}
-define_therm_throt_sysdev_show_func(throttle_count);
-define_therm_throt_sysdev_one_ro(throttle_count);
+define_therm_throt_sysdev_show_func(core_throttle, count);
+define_therm_throt_sysdev_one_ro(core_throttle_count);
+
+define_therm_throt_sysdev_show_func(core_power_limit, count);
+define_therm_throt_sysdev_one_ro(core_power_limit_count);
+
+define_therm_throt_sysdev_show_func(package_throttle, count);
+define_therm_throt_sysdev_one_ro(package_throttle_count);
+
+define_therm_throt_sysdev_show_func(package_power_limit, count);
+define_therm_throt_sysdev_one_ro(package_power_limit_count);
static struct attribute *thermal_throttle_attrs[] = {
- &attr_throttle_count.attr,
+ &attr_core_throttle_count.attr,
NULL
};
-static struct attribute_group thermal_throttle_attr_group = {
+static struct attribute_group thermal_attr_group = {
.attrs = thermal_throttle_attrs,
.name = "thermal_throttle"
};
#endif /* CONFIG_SYSFS */
+#define CORE_LEVEL 0
+#define PACKAGE_LEVEL 1
+
/***
* therm_throt_process - Process thermal throttling event from interrupt
* @curr: Whether the condition is current or not (boolean), since the
@@ -106,39 +130,70 @@ static struct attribute_group thermal_throttle_attr_group = {
* 1 : Event should be logged further, and a message has been
* printed to the syslog.
*/
-static int therm_throt_process(bool is_throttled)
+static int therm_throt_process(bool new_event, int event, int level)
{
- struct thermal_state *state;
- unsigned int this_cpu;
- bool was_throttled;
+ struct _thermal_state *state;
+ unsigned int this_cpu = smp_processor_id();
+ bool old_event;
u64 now;
+ struct thermal_state *pstate = &per_cpu(thermal_state, this_cpu);
- this_cpu = smp_processor_id();
now = get_jiffies_64();
- state = &per_cpu(thermal_state, this_cpu);
+ if (level == CORE_LEVEL) {
+ if (event == THERMAL_THROTTLING_EVENT)
+ state = &pstate->core_throttle;
+ else if (event == POWER_LIMIT_EVENT)
+ state = &pstate->core_power_limit;
+ else
+ return 0;
+ } else if (level == PACKAGE_LEVEL) {
+ if (event == THERMAL_THROTTLING_EVENT)
+ state = &pstate->package_throttle;
+ else if (event == POWER_LIMIT_EVENT)
+ state = &pstate->package_power_limit;
+ else
+ return 0;
+ } else
+ return 0;
- was_throttled = state->is_throttled;
- state->is_throttled = is_throttled;
+ old_event = state->new_event;
+ state->new_event = new_event;
- if (is_throttled)
- state->throttle_count++;
+ if (new_event)
+ state->count++;
if (time_before64(now, state->next_check) &&
- state->throttle_count != state->last_throttle_count)
+ state->count != state->last_count)
return 0;
state->next_check = now + CHECK_INTERVAL;
- state->last_throttle_count = state->throttle_count;
+ state->last_count = state->count;
/* if we just entered the thermal event */
- if (is_throttled) {
- printk(KERN_CRIT "CPU%d: Temperature above threshold, cpu clock throttled (total events = %lu)\n", this_cpu, state->throttle_count);
+ if (new_event) {
+ if (event == THERMAL_THROTTLING_EVENT)
+ printk(KERN_CRIT "CPU%d: %s temperature above threshold, cpu clock throttled (total events = %lu)\n",
+ this_cpu,
+ level == CORE_LEVEL ? "Core" : "Package",
+ state->count);
+ else
+ printk(KERN_CRIT "CPU%d: %s power limit notification (total events = %lu)\n",
+ this_cpu,
+ level == CORE_LEVEL ? "Core" : "Package",
+ state->count);
add_taint(TAINT_MACHINE_CHECK);
return 1;
}
- if (was_throttled) {
- printk(KERN_INFO "CPU%d: Temperature/speed normal\n", this_cpu);
+ if (old_event) {
+ if (event == THERMAL_THROTTLING_EVENT)
+ printk(KERN_INFO "CPU%d: %s temperature/speed normal\n",
+ this_cpu,
+ level == CORE_LEVEL ? "Core" : "Package");
+ else
+ printk(KERN_INFO "CPU%d: %s power limit normal\n",
+ this_cpu,
+ level == CORE_LEVEL ? "Core" : "Package");
return 1;
}
@@ -149,13 +204,32 @@ static int therm_throt_process(bool is_throttled)
/* Add/Remove thermal_throttle interface for CPU device: */
static __cpuinit int thermal_throttle_add_dev(struct sys_device *sys_dev)
{
- return sysfs_create_group(&sys_dev->kobj,
- &thermal_throttle_attr_group);
+ int err;
+ struct cpuinfo_x86 *c = &cpu_data(smp_processor_id());
+
+ err = sysfs_create_group(&sys_dev->kobj, &thermal_attr_group);
+ if (err)
+ return err;
+
+ if (cpu_has(c, X86_FEATURE_PLN))
+ err = sysfs_add_file_to_group(&sys_dev->kobj,
+ &attr_core_power_limit_count.attr,
+ thermal_attr_group.name);
+ if (cpu_has(c, X86_FEATURE_PTS))
+ err = sysfs_add_file_to_group(&sys_dev->kobj,
+ &attr_package_throttle_count.attr,
+ thermal_attr_group.name);
+ if (cpu_has(c, X86_FEATURE_PLN))
+ err = sysfs_add_file_to_group(&sys_dev->kobj,
+ &attr_package_power_limit_count.attr,
+ thermal_attr_group.name);
+
+ return err;
}
static __cpuinit void thermal_throttle_remove_dev(struct sys_device *sys_dev)
{
- sysfs_remove_group(&sys_dev->kobj, &thermal_throttle_attr_group);
+ sysfs_remove_group(&sys_dev->kobj, &thermal_attr_group);
}
/* Mutex protecting device creation against CPU hotplug: */
@@ -226,14 +300,50 @@ device_initcall(thermal_throttle_init_device);
#endif /* CONFIG_SYSFS */
+/*
+ * Set up the most two significant bit to notify mce log that this thermal
+ * event type.
+ * This is a temp solution. May be changed in the future with mce log
+ * infrasture.
+ */
+#define CORE_THROTTLED (0)
+#define CORE_POWER_LIMIT ((__u64)1 << 62)
+#define PACKAGE_THROTTLED ((__u64)2 << 62)
+#define PACKAGE_POWER_LIMIT ((__u64)3 << 62)
+
/* Thermal transition interrupt handler */
static void intel_thermal_interrupt(void)
{
__u64 msr_val;
+ struct cpuinfo_x86 *c = &cpu_data(smp_processor_id());
rdmsrl(MSR_IA32_THERM_STATUS, msr_val);
- if (therm_throt_process((msr_val & THERM_STATUS_PROCHOT) != 0))
- mce_log_therm_throt_event(msr_val);
+
+ if (therm_throt_process(msr_val & THERM_STATUS_PROCHOT,
+ THERMAL_THROTTLING_EVENT,
+ CORE_LEVEL) != 0)
+ mce_log_therm_throt_event(CORE_THROTTLED | msr_val);
+
+ if (cpu_has(c, X86_FEATURE_PLN))
+ if (therm_throt_process(msr_val & THERM_STATUS_POWER_LIMIT,
+ POWER_LIMIT_EVENT,
+ CORE_LEVEL) != 0)
+ mce_log_therm_throt_event(CORE_POWER_LIMIT | msr_val);
+
+ if (cpu_has(c, X86_FEATURE_PTS)) {
+ rdmsrl(MSR_IA32_PACKAGE_THERM_STATUS, msr_val);
+ if (therm_throt_process(msr_val & PACKAGE_THERM_STATUS_PROCHOT,
+ THERMAL_THROTTLING_EVENT,
+ PACKAGE_LEVEL) != 0)
+ mce_log_therm_throt_event(PACKAGE_THROTTLED | msr_val);
+ if (cpu_has(c, X86_FEATURE_PLN))
+ if (therm_throt_process(msr_val &
+ PACKAGE_THERM_STATUS_POWER_LIMIT,
+ POWER_LIMIT_EVENT,
+ PACKAGE_LEVEL) != 0)
+ mce_log_therm_throt_event(PACKAGE_POWER_LIMIT
+ | msr_val);
+ }
}
static void unexpected_thermal_interrupt(void)
@@ -335,8 +445,26 @@ void intel_init_thermal(struct cpuinfo_x86 *c)
apic_write(APIC_LVTTHMR, h);
rdmsr(MSR_IA32_THERM_INTERRUPT, l, h);
- wrmsr(MSR_IA32_THERM_INTERRUPT,
- l | (THERM_INT_LOW_ENABLE | THERM_INT_HIGH_ENABLE), h);
+ if (cpu_has(c, X86_FEATURE_PLN))
+ wrmsr(MSR_IA32_THERM_INTERRUPT,
+ l | (THERM_INT_LOW_ENABLE
+ | THERM_INT_HIGH_ENABLE | THERM_INT_PLN_ENABLE), h);
+ else
+ wrmsr(MSR_IA32_THERM_INTERRUPT,
+ l | (THERM_INT_LOW_ENABLE | THERM_INT_HIGH_ENABLE), h);
+
+ if (cpu_has(c, X86_FEATURE_PTS)) {
+ rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h);
+ if (cpu_has(c, X86_FEATURE_PLN))
+ wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT,
+ l | (PACKAGE_THERM_INT_LOW_ENABLE
+ | PACKAGE_THERM_INT_HIGH_ENABLE
+ | PACKAGE_THERM_INT_PLN_ENABLE), h);
+ else
+ wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT,
+ l | (PACKAGE_THERM_INT_LOW_ENABLE
+ | PACKAGE_THERM_INT_HIGH_ENABLE), h);
+ }
smp_thermal_vector = intel_thermal_interrupt;