x86, mce: fix reporting of Thermal Monitoring mechanism enabled
[linux-2.6.git] / arch / x86 / kernel / cpu / mcheck / therm_throt.c
index bff8dd1..15f2bc0 100644 (file)
@@ -253,9 +253,6 @@ void intel_init_thermal(struct cpuinfo_x86 *c)
                return;
        }
 
-       if (cpu_has(c, X86_FEATURE_TM2) && (l & MSR_IA32_MISC_ENABLE_TM2))
-               tm2 = 1;
-
        /* Check whether a vector already exists */
        if (h & APIC_VECTOR_MASK) {
                printk(KERN_DEBUG
@@ -264,6 +261,16 @@ void intel_init_thermal(struct cpuinfo_x86 *c)
                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);