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authorMichael Kelley <mikelley@microsoft.com>2021-03-03 00:38:15 +0300
committerWei Liu <wei.liu@kernel.org>2021-03-08 20:32:59 +0300
commitf3c5e63c3690fc64e5a7a2b3e4f9f5ff1fa25584 (patch)
treee0d4a0756b05766589c2aeaab81fca6608df2d6f /drivers/clocksource
parent5e4e6ddf8d74068fd6bb7922dabcfa2c0f506c39 (diff)
downloadlinux-f3c5e63c3690fc64e5a7a2b3e4f9f5ff1fa25584.tar.xz
Drivers: hv: Redo Hyper-V synthetic MSR get/set functions
Current code defines a separate get and set macro for each Hyper-V synthetic MSR used by the VMbus driver. Furthermore, the get macro can't be converted to a standard function because the second argument is modified in place, which is somewhat bad form. Redo this by providing a single get and a single set function that take a parameter specifying the MSR to be operated on. Fixup usage of the get function. Calling locations are no more complex than before, but the code under arch/x86 and the upcoming code under arch/arm64 is significantly simplified. Also standardize the names of Hyper-V synthetic MSRs that are architecture neutral. But keep the old x86-specific names as aliases that can be removed later when all references (particularly in KVM code) have been cleaned up in a separate patch series. No functional change. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Link: https://lore.kernel.org/r/1614721102-2241-4-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/hyperv_timer.c26
1 files changed, 12 insertions, 14 deletions
diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
index 269a691bd2c4..c73c1271e8b8 100644
--- a/drivers/clocksource/hyperv_timer.c
+++ b/drivers/clocksource/hyperv_timer.c
@@ -68,14 +68,14 @@ static int hv_ce_set_next_event(unsigned long delta,
current_tick = hv_read_reference_counter();
current_tick += delta;
- hv_init_timer(0, current_tick);
+ hv_set_register(HV_REGISTER_STIMER0_COUNT, current_tick);
return 0;
}
static int hv_ce_shutdown(struct clock_event_device *evt)
{
- hv_init_timer(0, 0);
- hv_init_timer_config(0, 0);
+ hv_set_register(HV_REGISTER_STIMER0_COUNT, 0);
+ hv_set_register(HV_REGISTER_STIMER0_CONFIG, 0);
if (direct_mode_enabled)
hv_disable_stimer0_percpu_irq(stimer0_irq);
@@ -105,7 +105,7 @@ static int hv_ce_set_oneshot(struct clock_event_device *evt)
timer_cfg.direct_mode = 0;
timer_cfg.sintx = stimer0_message_sint;
}
- hv_init_timer_config(0, timer_cfg.as_uint64);
+ hv_set_register(HV_REGISTER_STIMER0_CONFIG, timer_cfg.as_uint64);
return 0;
}
@@ -331,7 +331,7 @@ static u64 notrace read_hv_clock_tsc(void)
u64 current_tick = hv_read_tsc_page(hv_get_tsc_page());
if (current_tick == U64_MAX)
- hv_get_time_ref_count(current_tick);
+ current_tick = hv_get_register(HV_REGISTER_TIME_REF_COUNT);
return current_tick;
}
@@ -352,9 +352,9 @@ static void suspend_hv_clock_tsc(struct clocksource *arg)
u64 tsc_msr;
/* Disable the TSC page */
- hv_get_reference_tsc(tsc_msr);
+ tsc_msr = hv_get_register(HV_REGISTER_REFERENCE_TSC);
tsc_msr &= ~BIT_ULL(0);
- hv_set_reference_tsc(tsc_msr);
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
}
@@ -364,10 +364,10 @@ static void resume_hv_clock_tsc(struct clocksource *arg)
u64 tsc_msr;
/* Re-enable the TSC page */
- hv_get_reference_tsc(tsc_msr);
+ tsc_msr = hv_get_register(HV_REGISTER_REFERENCE_TSC);
tsc_msr &= GENMASK_ULL(11, 0);
tsc_msr |= BIT_ULL(0) | (u64)phys_addr;
- hv_set_reference_tsc(tsc_msr);
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
}
static int hv_cs_enable(struct clocksource *cs)
@@ -389,14 +389,12 @@ static struct clocksource hyperv_cs_tsc = {
static u64 notrace read_hv_clock_msr(void)
{
- u64 current_tick;
/*
* Read the partition counter to get the current tick count. This count
* is set to 0 when the partition is created and is incremented in
* 100 nanosecond units.
*/
- hv_get_time_ref_count(current_tick);
- return current_tick;
+ return hv_get_register(HV_REGISTER_TIME_REF_COUNT);
}
static u64 notrace read_hv_clock_msr_cs(struct clocksource *arg)
@@ -439,10 +437,10 @@ static bool __init hv_init_tsc_clocksource(void)
* (which already has at least the low 12 bits set to zero since
* it is page aligned). Also set the "enable" bit, which is bit 0.
*/
- hv_get_reference_tsc(tsc_msr);
+ tsc_msr = hv_get_register(HV_REGISTER_REFERENCE_TSC);
tsc_msr &= GENMASK_ULL(11, 0);
tsc_msr = tsc_msr | 0x1 | (u64)phys_addr;
- hv_set_reference_tsc(tsc_msr);
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
hv_set_clocksource_vdso(hyperv_cs_tsc);
clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);