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x86, mcheck, therm_throt: Process package thresholds 

Added callback registration for package threshold reports. Also added
a callback to check the rate control implemented in callback or not.
If there is no rate control implemented, then there is a default rate
control similar to core threshold notification by delaying for
CHECK_INTERVAL (5 minutes) between reports.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
hifive-unleashed-5.1
Srinivas Pandruvada 2013-05-17 23:42:01 +00:00 committed by Zhang Rui
parent c240a539df
commit 25cdce170d
2 changed files with 66 additions and 4 deletions
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7
arch/x86/include/asm/mce.h
View File

@ -214,6 +214,13 @@ void mce_log_therm_throt_event(__u64 status);
/* Interrupt Handler for core thermal thresholds */
extern int (*platform_thermal_notify)(__u64 msr_val);
/* Interrupt Handler for package thermal thresholds */
extern int (*platform_thermal_package_notify)(__u64 msr_val);
/* Callback support of rate control, return true, if
* callback has rate control */
extern bool (*platform_thermal_package_rate_control)(void);
#ifdef CONFIG_X86_THERMAL_VECTOR
extern void mcheck_intel_therm_init(void);
#else

63
arch/x86/kernel/cpu/mcheck/therm_throt.c
View File

@ -54,12 +54,24 @@ struct thermal_state {
struct _thermal_state package_power_limit;
struct _thermal_state core_thresh0;
struct _thermal_state core_thresh1;
struct _thermal_state pkg_thresh0;
struct _thermal_state pkg_thresh1;
};
/* Callback to handle core threshold interrupts */
int (*platform_thermal_notify)(__u64 msr_val);
EXPORT_SYMBOL(platform_thermal_notify);
/* Callback to handle core package threshold_interrupts */
int (*platform_thermal_package_notify)(__u64 msr_val);
EXPORT_SYMBOL_GPL(platform_thermal_package_notify);
/* Callback support of rate control, return true, if
* callback has rate control */
bool (*platform_thermal_package_rate_control)(void);
EXPORT_SYMBOL_GPL(platform_thermal_package_rate_control);
static DEFINE_PER_CPU(struct thermal_state, thermal_state);
static atomic_t therm_throt_en = ATOMIC_INIT(0);
@ -203,19 +215,25 @@ static int therm_throt_process(bool new_event, int event, int level)
return 0;
}
static int thresh_event_valid(int event)
static int thresh_event_valid(int level, int event)
{
struct _thermal_state *state;
unsigned int this_cpu = smp_processor_id();
struct thermal_state *pstate = &per_cpu(thermal_state, this_cpu);
u64 now = get_jiffies_64();
state = (event == 0) ? &pstate->core_thresh0 : &pstate->core_thresh1;
if (level == PACKAGE_LEVEL)
state = (event == 0) ? &pstate->pkg_thresh0 :
&pstate->pkg_thresh1;
else
state = (event == 0) ? &pstate->core_thresh0 :
&pstate->core_thresh1;
if (time_before64(now, state->next_check))
return 0;
state->next_check = now + CHECK_INTERVAL;
return 1;
}
@ -321,6 +339,39 @@ device_initcall(thermal_throttle_init_device);
#endif /* CONFIG_SYSFS */
static void notify_package_thresholds(__u64 msr_val)
{
bool notify_thres_0 = false;
bool notify_thres_1 = false;
if (!platform_thermal_package_notify)
return;
/* lower threshold check */
if (msr_val & THERM_LOG_THRESHOLD0)
notify_thres_0 = true;
/* higher threshold check */
if (msr_val & THERM_LOG_THRESHOLD1)
notify_thres_1 = true;
if (!notify_thres_0 && !notify_thres_1)
return;
if (platform_thermal_package_rate_control &&
platform_thermal_package_rate_control()) {
/* Rate control is implemented in callback */
platform_thermal_package_notify(msr_val);
return;
}
/* lower threshold reached */
if (notify_thres_0 && thresh_event_valid(PACKAGE_LEVEL, 0))
platform_thermal_package_notify(msr_val);
/* higher threshold reached */
if (notify_thres_1 && thresh_event_valid(PACKAGE_LEVEL, 1))
platform_thermal_package_notify(msr_val);
}
static void notify_thresholds(__u64 msr_val)
{
/* check whether the interrupt handler is defined;
@ -330,10 +381,12 @@ static void notify_thresholds(__u64 msr_val)
return;
/* lower threshold reached */
if ((msr_val & THERM_LOG_THRESHOLD0) && thresh_event_valid(0))
if ((msr_val & THERM_LOG_THRESHOLD0) &&
thresh_event_valid(CORE_LEVEL, 0))
platform_thermal_notify(msr_val);
/* higher threshold reached */
if ((msr_val & THERM_LOG_THRESHOLD1) && thresh_event_valid(1))
if ((msr_val & THERM_LOG_THRESHOLD1) &&
thresh_event_valid(CORE_LEVEL, 1))
platform_thermal_notify(msr_val);
}
@ -359,6 +412,8 @@ static void intel_thermal_interrupt(void)
if (this_cpu_has(X86_FEATURE_PTS)) {
rdmsrl(MSR_IA32_PACKAGE_THERM_STATUS, msr_val);
/* check violations of package thermal thresholds */
notify_package_thresholds(msr_val);
therm_throt_process(msr_val & PACKAGE_THERM_STATUS_PROCHOT,
THERMAL_THROTTLING_EVENT,
PACKAGE_LEVEL);