diff options
| author | Yubo Xie <yuboxie@microsoft.com> | 2020-03-27 05:11:59 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-03-27 14:27:45 +0300 |
| commit | 749da8ca978f19710aba496208c480ad42d37f79 (patch) | |
| tree | b1915b4e6b529795285ddf6c7e60bcba7ad673f5 /drivers/clocksource | |
| parent | 5ad0ec0b86525d0c5d3d250d3cfad7f183b00cfa (diff) | |
| download | linux-749da8ca978f19710aba496208c480ad42d37f79.tar.xz | |
clocksource/drivers/hyper-v: Make sched clock return nanoseconds correctly
The sched clock read functions return the HV clock (100ns granularity)
without converting it to nanoseconds.
Add the missing conversion.
Fixes: bd00cd52d5be ("clocksource/drivers/hyperv: Add Hyper-V specific sched clock function")
Signed-off-by: Yubo Xie <yuboxie@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200327021159.31429-1-Tianyu.Lan@microsoft.com
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/hyperv_timer.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c index 9d808d595ca8..eb0ba7818eb0 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -343,7 +343,8 @@ static u64 notrace read_hv_clock_tsc_cs(struct clocksource *arg) static u64 read_hv_sched_clock_tsc(void) { - return read_hv_clock_tsc() - hv_sched_clock_offset; + return (read_hv_clock_tsc() - hv_sched_clock_offset) * + (NSEC_PER_SEC / HV_CLOCK_HZ); } static void suspend_hv_clock_tsc(struct clocksource *arg) @@ -398,7 +399,8 @@ static u64 notrace read_hv_clock_msr_cs(struct clocksource *arg) static u64 read_hv_sched_clock_msr(void) { - return read_hv_clock_msr() - hv_sched_clock_offset; + return (read_hv_clock_msr() - hv_sched_clock_offset) * + (NSEC_PER_SEC / HV_CLOCK_HZ); } static struct clocksource hyperv_cs_msr = { |