[PATCH RFC v1 05/18] clocksource/hyperv: use MSR-based access if running as root

[Wei Liu]

Signed-off-by: Wei Liu <wei....@kernel.org>
---
 drivers/clocksource/hyperv_timer.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clocksource/hyperv_timer.c 
b/drivers/clocksource/hyperv_timer.c
index 09aa44cb8a91..fe96082ce85e 100644
--- a/drivers/clocksource/hyperv_timer.c
+++ b/drivers/clocksource/hyperv_timer.c
@@ -426,6 +426,9 @@ static bool __init hv_init_tsc_clocksource(void)
        if (!(ms_hyperv.features & HV_MSR_REFERENCE_TSC_AVAILABLE))
                return false;
 
+       if (hv_root_partition)
+               return false;
+
        hv_read_reference_counter = read_hv_clock_tsc;
        phys_addr = virt_to_phys(hv_get_tsc_page());
 
-- 
2.20.1