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

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(timer, tick) wrmsrl(timer, tick)
#define hv_init_timer_config(config, val) wrmsrl(config, val) #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)); WARN_ON(!clockevent_state_oneshot(evt));
hv_get_current_tick(current_tick); current_tick = hyperv_cs->read(NULL);
current_tick += delta; current_tick += delta;
hv_init_timer(HV_X64_MSR_STIMER0_COUNT, current_tick); hv_init_timer(HV_X64_MSR_STIMER0_COUNT, current_tick);
return 0; return 0;