From: K. Y. Srinivasan <k...@microsoft.com>
The current code uses the MSR based mechanism to get the current tick.
Use the current clock source as that might be more optimal.
Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
---
arch/x86/include/asm/mshyperv.h | 1 -
drivers/hv/hv.c | 2 +-
2 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index 7c9c895..7b07853 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -137,7 +137,6 @@ static inline void vmbus_signal_eom(struct hv_message *msg,
u32 old_msg_type)
}
}
-#define hv_get_current_tick(tick) rdmsrl(HV_X64_MSR_TIME_REF_COUNT, tick)
#define hv_init_timer(timer, tick) wrmsrl(timer, tick)
#define hv_init_timer_config(config, val) wrmsrl(config, val)
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 12e7bae..61fc8ce 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -96,7 +96,7 @@ static int hv_ce_set_next_event(unsigned long delta,
WARN_ON(!clockevent_state_oneshot(evt));
- hv_get_current_tick(current_tick);
+ current_tick = hyperv_cs->read(NULL);
current_tick += delta;
hv_init_timer(HV_X64_MSR_STIMER0_COUNT, current_tick);
return 0;
--
1.7.1
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