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Drivers: hv: vmbus: Get the current time from the current clocksource

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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 <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2017-05-18 10:46:02 -07:00 committed by Greg Kroah-Hartman
parent 7975bd4cca
commit e546d778d6
2 changed files with 1 additions and 2 deletions
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1
arch/x86/include/asm/mshyperv.h
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@ -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)

2
drivers/hv/hv.c
View File

@ -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;