1 files changed, 20 insertions, 12 deletions

diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index 29ef99001e05..b2ead91df218 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -100,7 +100,7 @@ void clear_local_APIC(void)
         maxlvt = get_maxlvt();
 
         /*
-         * Masking an LVT entry on a P6 can trigger a local APIC error
+         * Masking an LVT entry can trigger a local APIC error
          * if the vector is zero. Mask LVTERR first to prevent this.
          */
         if (maxlvt >= 3) {
@@ -851,7 +851,18 @@ void disable_APIC_timer(void)
                 unsigned long v;
 
                 v = apic_read(APIC_LVTT);
-                apic_write(APIC_LVTT, v | APIC_LVT_MASKED);
+                /*
+                 * When an illegal vector value (0-15) is written to an LVT
+                 * entry and delivery mode is Fixed, the APIC may signal an
+                 * illegal vector error, with out regard to whether the mask
+                 * bit is set or whether an interrupt is actually seen on input.
+                 *
+                 * Boot sequence might call this function when the LVTT has
+                 * '0' vector value. So make sure vector field is set to
+                 * valid value.
+                 */
+                v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
+                apic_write(APIC_LVTT, v);
         }
 }
 
@@ -909,15 +920,13 @@ int setup_profiling_timer(unsigned int multiplier)
         return -EINVAL;
 }
 
-#ifdef CONFIG_X86_MCE_AMD
-void setup_threshold_lvt(unsigned long lvt_off)
+void setup_APIC_extened_lvt(unsigned char lvt_off, unsigned char vector,
+                            unsigned char msg_type, unsigned char mask)
 {
-        unsigned int v = 0;
-        unsigned long reg = (lvt_off << 4) + 0x500;
-        v |= THRESHOLD_APIC_VECTOR;
+        unsigned long reg = (lvt_off << 4) + K8_APIC_EXT_LVT_BASE;
+        unsigned int  v   = (mask << 16) | (msg_type << 8) | vector;
         apic_write(reg, v);
 }
-#endif /* CONFIG_X86_MCE_AMD */
 
 #undef APIC_DIVISOR
 
@@ -983,7 +992,7 @@ void smp_apic_timer_interrupt(struct pt_regs *regs)
 }
 
 /*
- * oem_force_hpet_timer -- force HPET mode for some boxes.
+ * apic_is_clustered_box() -- Check if we can expect good TSC
  *
  * Thus far, the major user of this is IBM's Summit2 series:
  *
@@ -991,7 +1000,7 @@ void smp_apic_timer_interrupt(struct pt_regs *regs)
  * multi-chassis. Use available data to take a good guess.
  * If in doubt, go HPET.
  */
-__cpuinit int oem_force_hpet_timer(void)
+__cpuinit int apic_is_clustered_box(void)
 {
         int i, clusters, zeros;
         unsigned id;
@@ -1022,8 +1031,7 @@ __cpuinit int oem_force_hpet_timer(void)
         }
 
         /*
-         * If clusters > 2, then should be multi-chassis.  Return 1 for HPET.
-         * Else return 0 to use TSC.
+         * If clusters > 2, then should be multi-chassis.
          * May have to revisit this when multi-core + hyperthreaded CPUs come
          * out, but AFAIK this will work even for them.
          */