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-rw-r--r--xen/time.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/xen/time.c b/xen/time.c
index a11e7eb..93d87d4 100644
--- a/xen/time.c
+++ b/xen/time.c
@@ -34,6 +34,7 @@ static unsigned64_t lastnsec;
static unsigned64_t hyp_get_stime(void) {
unsigned32_t version;
unsigned64_t cpu_clock, last_cpu_clock, delta, system_time;
+ unsigned64_t delta_high, delta_low;
unsigned32_t mul;
signed8_t shift;
volatile struct vcpu_time_info *time = &hyp_shared_info.vcpu_info[0].time;
@@ -54,7 +55,10 @@ static unsigned64_t hyp_get_stime(void) {
delta >>= -shift;
else
delta <<= shift;
- return system_time + ((delta * (unsigned64_t) mul) >> 32);
+ delta_high = delta >> 32;
+ delta_low = (unsigned32_t) delta;
+ return system_time + ((delta_low * (unsigned64_t) mul) >> 32)
+ + (delta_high * (unsigned64_t) mul);
}
unsigned64_t hyp_get_time(void) {