diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig | 4 | ||||
| -rw-r--r-- | arch/x86/include/asm/mce.h | 16 | ||||
| -rw-r--r-- | arch/x86/include/asm/thermal.h | 13 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/intel.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mce/Makefile | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mce/intel.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mce/therm_throt.c | 732 | ||||
| -rw-r--r-- | arch/x86/kernel/irq.c | 21 |
8 files changed, 37 insertions, 755 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 7b6dd10b162a..54df3151cdb6 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1157,10 +1157,6 @@ config X86_MCE_INJECT If you don't know what a machine check is and you don't do kernel QA it is safe to say n. -config X86_THERMAL_VECTOR - def_bool y - depends on X86_MCE_INTEL - source "arch/x86/events/Kconfig" config X86_LEGACY_VM86 diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index def9aa5e1fa4..ddfb3cad8dff 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -289,22 +289,6 @@ extern void (*mce_threshold_vector)(void); extern void (*deferred_error_int_vector)(void); /* - * Thermal handler - */ - -void intel_init_thermal(struct cpuinfo_x86 *c); - -/* 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); - -/* * Used by APEI to report memory error via /dev/mcelog */ diff --git a/arch/x86/include/asm/thermal.h b/arch/x86/include/asm/thermal.h new file mode 100644 index 000000000000..ddbdefd5b94f --- /dev/null +++ b/arch/x86/include/asm/thermal.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_THERMAL_H +#define _ASM_X86_THERMAL_H + +#ifdef CONFIG_X86_THERMAL_VECTOR +void intel_init_thermal(struct cpuinfo_x86 *c); +bool x86_thermal_enabled(void); +void intel_thermal_interrupt(void); +#else +static inline void intel_init_thermal(struct cpuinfo_x86 *c) { } +#endif + +#endif /* _ASM_X86_THERMAL_H */ diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 59a1e3ce3f14..71221af87cb1 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -24,6 +24,7 @@ #include <asm/traps.h> #include <asm/resctrl.h> #include <asm/numa.h> +#include <asm/thermal.h> #ifdef CONFIG_X86_64 #include <linux/topology.h> @@ -719,6 +720,8 @@ static void init_intel(struct cpuinfo_x86 *c) tsx_disable(); split_lock_init(); + + intel_init_thermal(c); } #ifdef CONFIG_X86_32 diff --git a/arch/x86/kernel/cpu/mce/Makefile b/arch/x86/kernel/cpu/mce/Makefile index 9f020c994154..015856abdbb1 100644 --- a/arch/x86/kernel/cpu/mce/Makefile +++ b/arch/x86/kernel/cpu/mce/Makefile @@ -9,8 +9,6 @@ obj-$(CONFIG_X86_MCE_THRESHOLD) += threshold.o mce-inject-y := inject.o obj-$(CONFIG_X86_MCE_INJECT) += mce-inject.o -obj-$(CONFIG_X86_THERMAL_VECTOR) += therm_throt.o - obj-$(CONFIG_ACPI_APEI) += apei.o obj-$(CONFIG_X86_MCELOG_LEGACY) += dev-mcelog.o diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c index c2476fe0682e..e309476743b7 100644 --- a/arch/x86/kernel/cpu/mce/intel.c +++ b/arch/x86/kernel/cpu/mce/intel.c @@ -531,7 +531,6 @@ static void intel_imc_init(struct cpuinfo_x86 *c) void mce_intel_feature_init(struct cpuinfo_x86 *c) { - intel_init_thermal(c); intel_init_cmci(); intel_init_lmce(); intel_ppin_init(c); diff --git a/arch/x86/kernel/cpu/mce/therm_throt.c b/arch/x86/kernel/cpu/mce/therm_throt.c deleted file mode 100644 index 5b15d7cef1d1..000000000000 --- a/arch/x86/kernel/cpu/mce/therm_throt.c +++ /dev/null @@ -1,732 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Thermal throttle event support code (such as syslog messaging and rate - * limiting) that was factored out from x86_64 (mce_intel.c) and i386 (p4.c). - * - * This allows consistent reporting of CPU thermal throttle events. - * - * Maintains a counter in /sys that keeps track of the number of thermal - * events, such that the user knows how bad the thermal problem might be - * (since the logging to syslog is rate limited). - * - * Author: Dmitriy Zavin (dmitriyz@google.com) - * - * Credits: Adapted from Zwane Mwaikambo's original code in mce_intel.c. - * Inspired by Ross Biro's and Al Borchers' counter code. - */ -#include <linux/interrupt.h> -#include <linux/notifier.h> -#include <linux/jiffies.h> -#include <linux/kernel.h> -#include <linux/percpu.h> -#include <linux/export.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/smp.h> -#include <linux/cpu.h> - -#include <asm/processor.h> -#include <asm/traps.h> -#include <asm/apic.h> -#include <asm/mce.h> -#include <asm/msr.h> -#include <asm/trace/irq_vectors.h> - -#include "internal.h" - -/* How long to wait between reporting thermal events */ -#define CHECK_INTERVAL (300 * HZ) - -#define THERMAL_THROTTLING_EVENT 0 -#define POWER_LIMIT_EVENT 1 - -/** - * struct _thermal_state - Represent the current thermal event state - * @next_check: Stores the next timestamp, when it is allowed - * to log the next warning message. - * @last_interrupt_time: Stores the timestamp for the last threshold - * high event. - * @therm_work: Delayed workqueue structure - * @count: Stores the current running count for thermal - * or power threshold interrupts. - * @last_count: Stores the previous running count for thermal - * or power threshold interrupts. - * @max_time_ms: This shows the maximum amount of time CPU was - * in throttled state for a single thermal - * threshold high to low state. - * @total_time_ms: This is a cumulative time during which CPU was - * in the throttled state. - * @rate_control_active: Set when a throttling message is logged. - * This is used for the purpose of rate-control. - * @new_event: Stores the last high/low status of the - * THERM_STATUS_PROCHOT or - * THERM_STATUS_POWER_LIMIT. - * @level: Stores whether this _thermal_state instance is - * for a CORE level or for PACKAGE level. - * @sample_index: Index for storing the next sample in the buffer - * temp_samples[]. - * @sample_count: Total number of samples collected in the buffer - * temp_samples[]. - * @average: The last moving average of temperature samples - * @baseline_temp: Temperature at which thermal threshold high - * interrupt was generated. - * @temp_samples: Storage for temperature samples to calculate - * moving average. - * - * This structure is used to represent data related to thermal state for a CPU. - * There is a separate storage for core and package level for each CPU. - */ -struct _thermal_state { - u64 next_check; - u64 last_interrupt_time; - struct delayed_work therm_work; - unsigned long count; - unsigned long last_count; - unsigned long max_time_ms; - unsigned long total_time_ms; - bool rate_control_active; - bool new_event; - u8 level; - u8 sample_index; - u8 sample_count; - u8 average; - u8 baseline_temp; - u8 temp_samples[3]; -}; - -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; - 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); - -static u32 lvtthmr_init __read_mostly; - -#ifdef CONFIG_SYSFS -#define define_therm_throt_device_one_ro(_name) \ - static DEVICE_ATTR(_name, 0444, \ - therm_throt_device_show_##_name, \ - NULL) \ - -#define define_therm_throt_device_show_func(event, name) \ - \ -static ssize_t therm_throt_device_show_##event##_##name( \ - struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ - unsigned int cpu = dev->id; \ - ssize_t ret; \ - \ - preempt_disable(); /* CPU hotplug */ \ - if (cpu_online(cpu)) { \ - ret = sprintf(buf, "%lu\n", \ - per_cpu(thermal_state, cpu).event.name); \ - } else \ - ret = 0; \ - preempt_enable(); \ - \ - return ret; \ -} - -define_therm_throt_device_show_func(core_throttle, count); -define_therm_throt_device_one_ro(core_throttle_count); - -define_therm_throt_device_show_func(core_power_limit, count); -define_therm_throt_device_one_ro(core_power_limit_count); - -define_therm_throt_device_show_func(package_throttle, count); -define_therm_throt_device_one_ro(package_throttle_count); - -define_therm_throt_device_show_func(package_power_limit, count); -define_therm_throt_device_one_ro(package_power_limit_count); - -define_therm_throt_device_show_func(core_throttle, max_time_ms); -define_therm_throt_device_one_ro(core_throttle_max_time_ms); - -define_therm_throt_device_show_func(package_throttle, max_time_ms); -define_therm_throt_device_one_ro(package_throttle_max_time_ms); - -define_therm_throt_device_show_func(core_throttle, total_time_ms); -define_therm_throt_device_one_ro(core_throttle_total_time_ms); - -define_therm_throt_device_show_func(package_throttle, total_time_ms); -define_therm_throt_device_one_ro(package_throttle_total_time_ms); - -static struct attribute *thermal_throttle_attrs[] = { - &dev_attr_core_throttle_count.attr, - &dev_attr_core_throttle_max_time_ms.attr, - &dev_attr_core_throttle_total_time_ms.attr, - NULL -}; - -static const struct attribute_group thermal_attr_group = { - .attrs = thermal_throttle_attrs, - .name = "thermal_throttle" -}; -#endif /* CONFIG_SYSFS */ - -#define CORE_LEVEL 0 -#define PACKAGE_LEVEL 1 - -#define THERM_THROT_POLL_INTERVAL HZ -#define THERM_STATUS_PROCHOT_LOG BIT(1) - -#define THERM_STATUS_CLEAR_CORE_MASK (BIT(1) | BIT(3) | BIT(5) | BIT(7) | BIT(9) | BIT(11) | BIT(13) | BIT(15)) -#define THERM_STATUS_CLEAR_PKG_MASK (BIT(1) | BIT(3) | BIT(5) | BIT(7) | BIT(9) | BIT(11)) - -static void clear_therm_status_log(int level) -{ - int msr; - u64 mask, msr_val; - - if (level == CORE_LEVEL) { - msr = MSR_IA32_THERM_STATUS; - mask = THERM_STATUS_CLEAR_CORE_MASK; - } else { - msr = MSR_IA32_PACKAGE_THERM_STATUS; - mask = THERM_STATUS_CLEAR_PKG_MASK; - } - - rdmsrl(msr, msr_val); - msr_val &= mask; - wrmsrl(msr, msr_val & ~THERM_STATUS_PROCHOT_LOG); -} - -static void get_therm_status(int level, bool *proc_hot, u8 *temp) -{ - int msr; - u64 msr_val; - - if (level == CORE_LEVEL) - msr = MSR_IA32_THERM_STATUS; - else - msr = MSR_IA32_PACKAGE_THERM_STATUS; - - rdmsrl(msr, msr_val); - if (msr_val & THERM_STATUS_PROCHOT_LOG) - *proc_hot = true; - else - *proc_hot = false; - - *temp = (msr_val >> 16) & 0x7F; -} - -static void __maybe_unused throttle_active_work(struct work_struct *work) -{ - struct _thermal_state *state = container_of(to_delayed_work(work), - struct _thermal_state, therm_work); - unsigned int i, avg, this_cpu = smp_processor_id(); - u64 now = get_jiffies_64(); - bool hot; - u8 temp; - - get_therm_status(state->level, &hot, &temp); - /* temperature value is offset from the max so lesser means hotter */ - if (!hot && temp > state->baseline_temp) { - if (state->rate_control_active) - pr_info("CPU%d: %s temperature/speed normal (total events = %lu)\n", - this_cpu, - state->level == CORE_LEVEL ? "Core" : "Package", - state->count); - - state->rate_control_active = false; - return; - } - - if (time_before64(now, state->next_check) && - state->rate_control_active) - goto re_arm; - - state->next_check = now + CHECK_INTERVAL; - - if (state->count != state->last_count) { - /* There was one new thermal interrupt */ - state->last_count = state->count; - state->average = 0; - state->sample_count = 0; - state->sample_index = 0; - } - - state->temp_samples[state->sample_index] = temp; - state->sample_count++; - state->sample_index = (state->sample_index + 1) % ARRAY_SIZE(state->temp_samples); - if (state->sample_count < ARRAY_SIZE(state->temp_samples)) - goto re_arm; - - avg = 0; - for (i = 0; i < ARRAY_SIZE(state->temp_samples); ++i) - avg += state->temp_samples[i]; - - avg /= ARRAY_SIZE(state->temp_samples); - - if (state->average > avg) { - pr_warn("CPU%d: %s temperature is above threshold, cpu clock is throttled (total events = %lu)\n", - this_cpu, - state->level == CORE_LEVEL ? "Core" : "Package", - state->count); - state->rate_control_active = true; - } - - state->average = avg; - -re_arm: - clear_therm_status_log(state->level); - schedule_delayed_work_on(this_cpu, &state->therm_work, THERM_THROT_POLL_INTERVAL); -} - -/*** - * therm_throt_process - Process thermal throttling event from interrupt - * @curr: Whether the condition is current or not (boolean), since the - * thermal interrupt normally gets called both when the thermal - * event begins and once the event has ended. - * - * This function is called by the thermal interrupt after the - * IRQ has been acknowledged. - * - * It will take care of rate limiting and printing messages to the syslog. - */ -static void therm_throt_process(bool new_event, int event, int level) -{ - 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); - - now = get_jiffies_64(); - 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; - } 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; - } else - return; - - old_event = state->new_event; - state->new_event = new_event; - - if (new_event) - state->count++; - - if (event != THERMAL_THROTTLING_EVENT) - return; - - if (new_event && !state->last_interrupt_time) { - bool hot; - u8 temp; - - get_therm_status(state->level, &hot, &temp); - /* - * Ignore short temperature spike as the system is not close - * to PROCHOT. 10C offset is large enough to ignore. It is - * already dropped from the high threshold temperature. - */ - if (temp > 10) - return; - - state->baseline_temp = temp; - state->last_interrupt_time = now; - schedule_delayed_work_on(this_cpu, &state->therm_work, THERM_THROT_POLL_INTERVAL); - } else if (old_event && state->last_interrupt_time) { - unsigned long throttle_time; - - throttle_time = jiffies_delta_to_msecs(now - state->last_interrupt_time); - if (throttle_time > state->max_time_ms) - state->max_time_ms = throttle_time; - state->total_time_ms += throttle_time; - state->last_interrupt_time = 0; - } -} - -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(); - - 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; -} - -static bool int_pln_enable; -static int __init int_pln_enable_setup(char *s) -{ - int_pln_enable = true; - - return 1; -} -__setup("int_pln_enable", int_pln_enable_setup); - -#ifdef CONFIG_SYSFS -/* Add/Remove thermal_throttle interface for CPU device: */ -static int thermal_throttle_add_dev(struct device *dev, unsigned int cpu) -{ - int err; - struct cpuinfo_x86 *c = &cpu_data(cpu); - - err = sysfs_create_group(&dev->kobj, &thermal_attr_group); - if (err) - return err; - - if (cpu_has(c, X86_FEATURE_PLN) && int_pln_enable) { - err = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_core_power_limit_count.attr, - thermal_attr_group.name); - if (err) - goto del_group; - } - - if (cpu_has(c, X86_FEATURE_PTS)) { - err = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_package_throttle_count.attr, - thermal_attr_group.name); - if (err) - goto del_group; - - err = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_package_throttle_max_time_ms.attr, - thermal_attr_group.name); - if (err) - goto del_group; - - err = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_package_throttle_total_time_ms.attr, - thermal_attr_group.name); - if (err) - goto del_group; - - if (cpu_has(c, X86_FEATURE_PLN) && int_pln_enable) { - err = sysfs_add_file_to_group(&dev->kobj, - &dev_attr_package_power_limit_count.attr, - thermal_attr_group.name); - if (err) - goto del_group; - } - } - - return 0; - -del_group: - sysfs_remove_group(&dev->kobj, &thermal_attr_group); - - return err; -} - -static void thermal_throttle_remove_dev(struct device *dev) -{ - sysfs_remove_group(&dev->kobj, &thermal_attr_group); -} - -/* Get notified when a cpu comes on/off. Be hotplug friendly. */ -static int thermal_throttle_online(unsigned int cpu) -{ - struct thermal_state *state = &per_cpu(thermal_state, cpu); - struct device *dev = get_cpu_device(cpu); - u32 l; - - state->package_throttle.level = PACKAGE_LEVEL; - state->core_throttle.level = CORE_LEVEL; - - INIT_DELAYED_WORK(&state->package_throttle.therm_work, throttle_active_work); - INIT_DELAYED_WORK(&state->core_throttle.therm_work, throttle_active_work); - - /* Unmask the thermal vector after the above workqueues are initialized. */ - l = apic_read(APIC_LVTTHMR); - apic_write(APIC_LVTTHMR, l & ~APIC_LVT_MASKED); - - return thermal_throttle_add_dev(dev, cpu); -} - -static int thermal_throttle_offline(unsigned int cpu) -{ - struct thermal_state *state = &per_cpu(thermal_state, cpu); - struct device *dev = get_cpu_device(cpu); - u32 l; - - /* Mask the thermal vector before draining evtl. pending work */ - l = apic_read(APIC_LVTTHMR); - apic_write(APIC_LVTTHMR, l | APIC_LVT_MASKED); - - cancel_delayed_work_sync(&state->package_throttle.therm_work); - cancel_delayed_work_sync(&state->core_throttle.therm_work); - - state->package_throttle.rate_control_active = false; - state->core_throttle.rate_control_active = false; - - thermal_throttle_remove_dev(dev); - return 0; -} - -static __init int thermal_throttle_init_device(void) -{ - int ret; - - if (!atomic_read(&therm_throt_en)) - return 0; - - ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "x86/therm:online", - thermal_throttle_online, - thermal_throttle_offline); - return ret < 0 ? ret : 0; -} -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; - * otherwise simply return - */ - if (!platform_thermal_notify) - return; - - /* lower threshold reached */ - 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(CORE_LEVEL, 1)) - platform_thermal_notify(msr_val); -} - -/* Thermal transition interrupt handler */ -static void intel_thermal_interrupt(void) -{ - __u64 msr_val; - - if (static_cpu_has(X86_FEATURE_HWP)) - wrmsrl_safe(MSR_HWP_STATUS, 0); - - rdmsrl(MSR_IA32_THERM_STATUS, msr_val); - - /* Check for violation of core thermal thresholds*/ - notify_thresholds(msr_val); - - therm_throt_process(msr_val & THERM_STATUS_PROCHOT, - THERMAL_THROTTLING_EVENT, - CORE_LEVEL); - - if (this_cpu_has(X86_FEATURE_PLN) && int_pln_enable) - therm_throt_process(msr_val & THERM_STATUS_POWER_LIMIT, - POWER_LIMIT_EVENT, - CORE_LEVEL); - - 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); - if (this_cpu_has(X86_FEATURE_PLN) && int_pln_enable) - therm_throt_process(msr_val & - PACKAGE_THERM_STATUS_POWER_LIMIT, - POWER_LIMIT_EVENT, - PACKAGE_LEVEL); - } -} - -static void unexpected_thermal_interrupt(void) -{ - pr_err("CPU%d: Unexpected LVT thermal interrupt!\n", - smp_processor_id()); -} - -static void (*smp_thermal_vector)(void) = unexpected_thermal_interrupt; - -DEFINE_IDTENTRY_SYSVEC(sysvec_thermal) -{ - trace_thermal_apic_entry(THERMAL_APIC_VECTOR); - inc_irq_stat(irq_thermal_count); - smp_thermal_vector(); - trace_thermal_apic_exit(THERMAL_APIC_VECTOR); - ack_APIC_irq(); -} - -/* Thermal monitoring depends on APIC, ACPI and clock modulation */ -static int intel_thermal_supported(struct cpuinfo_x86 *c) -{ - if (!boot_cpu_has(X86_FEATURE_APIC)) - return 0; - if (!cpu_has(c, X86_FEATURE_ACPI) || !cpu_has(c, X86_FEATURE_ACC)) - return 0; - return 1; -} - -void intel_init_thermal(struct cpuinfo_x86 *c) -{ - unsigned int cpu = smp_processor_id(); - int tm2 = 0; - u32 l, h; - - if (!intel_thermal_supported(c)) - return; - - /* On the BSP? */ - if (c == &boot_cpu_data) - lvtthmr_init = apic_read(APIC_LVTTHMR); - - /* - * First check if its enabled already, in which case there might - * be some SMM goo which handles it, so we can't even put a handler - * since it might be delivered via SMI already: - */ - rdmsr(MSR_IA32_MISC_ENABLE, l, h); - - h = lvtthmr_init; - /* - * The initial value of thermal LVT entries on all APs always reads - * 0x10000 because APs are woken up by BSP issuing INIT-SIPI-SIPI - * sequence to them and LVT registers are reset to 0s except for - * the mask bits which are set to 1s when APs receive INIT IPI. - * If BIOS takes over the thermal interrupt and sets its interrupt - * delivery mode to SMI (not fixed), it restores the value that the - * BIOS has programmed on AP based on BSP's info we saved since BIOS - * is always setting the same value for all threads/cores. - */ - if ((h & APIC_DM_FIXED_MASK) != APIC_DM_FIXED) - apic_write(APIC_LVTTHMR, lvtthmr_init); - - - if ((l & MSR_IA32_MISC_ENABLE_TM1) && (h & APIC_DM_SMI)) { - if (system_state == SYSTEM_BOOTING) - pr_debug("CPU%d: Thermal monitoring handled by SMI\n", cpu); - return; - } - - /* early Pentium M models use different method for enabling TM2 */ - if (cpu_has(c, X86_FEATURE_TM2)) { - if (c->x86 == 6 && (c->x86_model == 9 || c->x86_model == 13)) { - rdmsr(MSR_THERM2_CTL, l, h); - if (l & MSR_THERM2_CTL_TM_SELECT) - tm2 = 1; - } else if (l & MSR_IA32_MISC_ENABLE_TM2) - tm2 = 1; - } - - /* We'll mask the thermal vector in the lapic till we're ready: */ - h = THERMAL_APIC_VECTOR | APIC_DM_FIXED | APIC_LVT_MASKED; - apic_write(APIC_LVTTHMR, h); - - rdmsr(MSR_IA32_THERM_INTERRUPT, l, h); - if (cpu_has(c, X86_FEATURE_PLN) && !int_pln_enable) - wrmsr(MSR_IA32_THERM_INTERRUPT, - (l | (THERM_INT_LOW_ENABLE - | THERM_INT_HIGH_ENABLE)) & ~THERM_INT_PLN_ENABLE, h); - else if (cpu_has(c, X86_FEATURE_PLN) && int_pln_enable) - 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) && !int_pln_enable) - wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, - (l | (PACKAGE_THERM_INT_LOW_ENABLE - | PACKAGE_THERM_INT_HIGH_ENABLE)) - & ~PACKAGE_THERM_INT_PLN_ENABLE, h); - else if (cpu_has(c, X86_FEATURE_PLN) && int_pln_enable) - 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; - - rdmsr(MSR_IA32_MISC_ENABLE, l, h); - wrmsr(MSR_IA32_MISC_ENABLE, l | MSR_IA32_MISC_ENABLE_TM1, h); - - pr_info_once("CPU0: Thermal monitoring enabled (%s)\n", - tm2 ? "TM2" : "TM1"); - - /* enable thermal throttle processing */ - atomic_set(&therm_throt_en, 1); -} diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index c5dd50369e2f..d4ad344e80bf 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -21,6 +21,7 @@ #include <asm/hw_irq.h> #include <asm/desc.h> #include <asm/traps.h> +#include <asm/thermal.h> #define CREATE_TRACE_POINTS #include <asm/trace/irq_vectors.h> @@ -374,3 +375,23 @@ void fixup_irqs(void) } } #endif + +#ifdef CONFIG_X86_THERMAL_VECTOR +static void smp_thermal_vector(void) +{ + if (x86_thermal_enabled()) + intel_thermal_interrupt(); + else + pr_err("CPU%d: Unexpected LVT thermal interrupt!\n", + smp_processor_id()); +} + +DEFINE_IDTENTRY_SYSVEC(sysvec_thermal) +{ + trace_thermal_apic_entry(THERMAL_APIC_VECTOR); + inc_irq_stat(irq_thermal_count); + smp_thermal_vector(); + trace_thermal_apic_exit(THERMAL_APIC_VECTOR); + ack_APIC_irq(); +} +#endif |