mirror of https://gitee.com/openkylin/linux.git
91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
/*
|
|
* Intel specific MCE features.
|
|
* Copyright 2004 Zwane Mwaikambo <zwane@linuxpower.ca>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/percpu.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/msr.h>
|
|
#include <asm/mce.h>
|
|
#include <asm/hw_irq.h>
|
|
#include <asm/idle.h>
|
|
#include <asm/therm_throt.h>
|
|
|
|
asmlinkage void smp_thermal_interrupt(void)
|
|
{
|
|
__u64 msr_val;
|
|
|
|
ack_APIC_irq();
|
|
|
|
exit_idle();
|
|
irq_enter();
|
|
|
|
rdmsrl(MSR_IA32_THERM_STATUS, msr_val);
|
|
if (therm_throt_process(msr_val & 1))
|
|
mce_log_therm_throt_event(smp_processor_id(), msr_val);
|
|
|
|
inc_irq_stat(irq_thermal_count);
|
|
irq_exit();
|
|
}
|
|
|
|
static void intel_init_thermal(struct cpuinfo_x86 *c)
|
|
{
|
|
u32 l, h;
|
|
int tm2 = 0;
|
|
unsigned int cpu = smp_processor_id();
|
|
|
|
if (!cpu_has(c, X86_FEATURE_ACPI))
|
|
return;
|
|
|
|
if (!cpu_has(c, X86_FEATURE_ACC))
|
|
return;
|
|
|
|
/* first check if TM1 is already enabled by the BIOS, 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 = apic_read(APIC_LVTTHMR);
|
|
if ((l & (1 << 3)) && (h & APIC_DM_SMI)) {
|
|
printk(KERN_DEBUG
|
|
"CPU%d: Thermal monitoring handled by SMI\n", cpu);
|
|
return;
|
|
}
|
|
|
|
if (cpu_has(c, X86_FEATURE_TM2) && (l & (1 << 13)))
|
|
tm2 = 1;
|
|
|
|
if (h & APIC_VECTOR_MASK) {
|
|
printk(KERN_DEBUG
|
|
"CPU%d: Thermal LVT vector (%#x) already "
|
|
"installed\n", cpu, (h & APIC_VECTOR_MASK));
|
|
return;
|
|
}
|
|
|
|
h = THERMAL_APIC_VECTOR;
|
|
h |= (APIC_DM_FIXED | APIC_LVT_MASKED);
|
|
apic_write(APIC_LVTTHMR, h);
|
|
|
|
rdmsr(MSR_IA32_THERM_INTERRUPT, l, h);
|
|
wrmsr(MSR_IA32_THERM_INTERRUPT, l | 0x03, h);
|
|
|
|
rdmsr(MSR_IA32_MISC_ENABLE, l, h);
|
|
wrmsr(MSR_IA32_MISC_ENABLE, l | (1 << 3), h);
|
|
|
|
l = apic_read(APIC_LVTTHMR);
|
|
apic_write(APIC_LVTTHMR, l & ~APIC_LVT_MASKED);
|
|
printk(KERN_INFO "CPU%d: Thermal monitoring enabled (%s)\n",
|
|
cpu, tm2 ? "TM2" : "TM1");
|
|
|
|
/* enable thermal throttle processing */
|
|
atomic_set(&therm_throt_en, 1);
|
|
return;
|
|
}
|
|
|
|
void mce_intel_feature_init(struct cpuinfo_x86 *c)
|
|
{
|
|
intel_init_thermal(c);
|
|
}
|