Merge branches 'x86-efi-for-linus', 'x86-gart-for-linus', 'x86-irq-for-linus' and...

[karo-tx-linux.git] / arch / x86 / kernel / cpu / mcheck / therm_throt.c

diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index 6f8c5e9da97f0f3e4c0ac89557a3b2f1c3a5f01e..f5208ff28b5c7edf2a1af399df6762814ed49714 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -187,8 +187,6 @@ static int therm_throt_process(bool new_event, int event, int level)
                                this_cpu,
                                level == CORE_LEVEL ? "Core" : "Package",
                                state->count);
-
-               add_taint(TAINT_MACHINE_CHECK);
                return 1;
        }
        if (old_event) {
@@ -393,7 +391,6 @@ static void unexpected_thermal_interrupt(void)
 {
        printk(KERN_ERR "CPU%d: Unexpected LVT thermal interrupt!\n",
                        smp_processor_id());
-       add_taint(TAINT_MACHINE_CHECK);
 }
 
 static void (*smp_thermal_vector)(void) = unexpected_thermal_interrupt;
@@ -446,18 +443,20 @@ void intel_init_thermal(struct cpuinfo_x86 *c)
         */
        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.
-        * Always restore the value that 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 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.
         */
-       apic_write(APIC_LVTTHMR, lvtthmr_init);
+       if ((h & APIC_DM_FIXED_MASK) != APIC_DM_FIXED)
+               apic_write(APIC_LVTTHMR, lvtthmr_init);
 
-       h = lvtthmr_init;
 
        if ((l & MSR_IA32_MISC_ENABLE_TM1) && (h & APIC_DM_SMI)) {
                printk(KERN_DEBUG