1 files changed, 21 insertions, 16 deletions

diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c
index dba7237be5c1..3080f84bf7b7 100644
--- a/arch/x86_64/kernel/time.c
+++ b/arch/x86_64/kernel/time.c
@@ -48,6 +48,8 @@ static void cpufreq_delayed_get(void);
 extern void i8254_timer_resume(void);
 extern int using_apic_timer;
 
+static char *time_init_gtod(void);
+
 DEFINE_SPINLOCK(rtc_lock);
 DEFINE_SPINLOCK(i8253_lock);
 
@@ -59,7 +61,7 @@ static int notsc __initdata = 0;
 unsigned int cpu_khz;                                   /* TSC clocks / usec, not used here */
 static unsigned long hpet_period;                       /* fsecs / HPET clock */
 unsigned long hpet_tick;                                /* HPET clocks / interrupt */
-static int hpet_use_timer;                              /* Use counter of hpet for time keeping, otherwise PIT */
+int hpet_use_timer;                             /* Use counter of hpet for time keeping, otherwise PIT */
 unsigned long vxtime_hz = PIT_TICK_RATE;
 int report_lost_ticks;                          /* command line option */
 unsigned long long monotonic_base;
@@ -326,7 +328,10 @@ static noinline void handle_lost_ticks(int lost, struct pt_regs *regs)
             print_symbol("rip %s\n", regs->rip);
             if (vxtime.mode == VXTIME_TSC && vxtime.hpet_address) {
                     printk(KERN_WARNING "Falling back to HPET\n");
-                    vxtime.last = hpet_readl(HPET_T0_CMP) - hpet_tick;
+                    if (hpet_use_timer)
+                        vxtime.last = hpet_readl(HPET_T0_CMP) - hpet_tick;
+                    else
+                        vxtime.last = hpet_readl(HPET_COUNTER);
                     vxtime.mode = VXTIME_HPET;
                     do_gettimeoffset = do_gettimeoffset_hpet;
             }
@@ -898,6 +903,7 @@ static struct irqaction irq0 = {
 void __init time_init(void)
 {
         char *timename;
+        char *gtod;
 
 #ifdef HPET_HACK_ENABLE_DANGEROUS
         if (!vxtime.hpet_address) {
@@ -942,21 +948,19 @@ void __init time_init(void)
                 timename = "PIT";
         }
 
-        printk(KERN_INFO "time.c: Using %ld.%06ld MHz %s timer.\n",
-               vxtime_hz / 1000000, vxtime_hz % 1000000, timename);
+        vxtime.mode = VXTIME_TSC;
+        gtod = time_init_gtod();
+
+        printk(KERN_INFO "time.c: Using %ld.%06ld MHz WALL %s GTOD %s timer.\n",
+               vxtime_hz / 1000000, vxtime_hz % 1000000, timename, gtod);
         printk(KERN_INFO "time.c: Detected %d.%03d MHz processor.\n",
                 cpu_khz / 1000, cpu_khz % 1000);
-        vxtime.mode = VXTIME_TSC;
         vxtime.quot = (1000000L << 32) / vxtime_hz;
         vxtime.tsc_quot = (1000L << 32) / cpu_khz;
         vxtime.last_tsc = get_cycles_sync();
         setup_irq(0, &irq0);
 
         set_cyc2ns_scale(cpu_khz);
-
-#ifndef CONFIG_SMP
-        time_init_gtod();
-#endif
 }
 
 /*
@@ -978,9 +982,9 @@ __cpuinit int unsynchronized_tsc(void)
 }
 
 /*
- * Decide after all CPUs are booted what mode gettimeofday should use.
+ * Decide what mode gettimeofday should use.
  */
-void __init time_init_gtod(void)
+__init static char *time_init_gtod(void)
 {
         char *timetype;
 
@@ -988,7 +992,10 @@ void __init time_init_gtod(void)
                 notsc = 1;
         if (vxtime.hpet_address && notsc) {
                 timetype = hpet_use_timer ? "HPET" : "PIT/HPET";
-                vxtime.last = hpet_readl(HPET_T0_CMP) - hpet_tick;
+                if (hpet_use_timer)
+                        vxtime.last = hpet_readl(HPET_T0_CMP) - hpet_tick;
+                else
+                        vxtime.last = hpet_readl(HPET_COUNTER);
                 vxtime.mode = VXTIME_HPET;
                 do_gettimeoffset = do_gettimeoffset_hpet;
 #ifdef CONFIG_X86_PM_TIMER
@@ -1005,8 +1012,7 @@ void __init time_init_gtod(void)
                 timetype = hpet_use_timer ? "HPET/TSC" : "PIT/TSC";
                 vxtime.mode = VXTIME_TSC;
         }
-
-        printk(KERN_INFO "time.c: Using %s based timekeeping.\n", timetype);
+        return timetype;
 }
 
 __setup("report_lost_ticks", time_setup);
@@ -1321,8 +1327,7 @@ static int __init nohpet_setup(char *s)
 
 __setup("nohpet", nohpet_setup);
 
-
-static int __init notsc_setup(char *s)
+int __init notsc_setup(char *s)
 {
         notsc = 1;
         return 0;