summaryrefslogtreecommitdiffstats
path: root/arch/x86_64/kernel/time.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86_64/kernel/time.c')
-rw-r--r--arch/x86_64/kernel/time.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c
index fdaddc4..7410279 100644
--- a/arch/x86_64/kernel/time.c
+++ b/arch/x86_64/kernel/time.c
@@ -59,7 +59,7 @@ 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;
+static 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;
@@ -908,12 +908,14 @@ void __init time_init(void)
if (!hpet_init())
vxtime_hz = (1000000000000000L + hpet_period / 2) /
hpet_period;
+ else
+ vxtime.hpet_address = 0;
if (hpet_use_timer) {
cpu_khz = hpet_calibrate_tsc();
timename = "HPET";
#ifdef CONFIG_X86_PM_TIMER
- } else if (pmtmr_ioport) {
+ } else if (pmtmr_ioport && !vxtime.hpet_address) {
vxtime_hz = PM_TIMER_FREQUENCY;
timename = "PM";
pit_init();
OpenPOWER on IntegriCloud