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x86/hpet: Carve out shareable parts of init_one_hpet_msi_clockevent()

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To finally remove the static channel0/clockevent storage and to utilize the
channel 0 storage in hpet_base, it's required to run time initialize the
clockevent. The MSI clockevents already have a run time init function.

Carve out the parts which can be shared between the legacy and the MSI
implementation.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Link: https://lkml.kernel.org/r/20190623132436.552451082@linutronix.de
This commit is contained in:
Thomas Gleixner 2019-06-23 15:24:07 +02:00
parent 310b5b3eb6
commit ea99110dd0
1 changed files with 20 additions and 13 deletions
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33
arch/x86/kernel/hpet.c
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@ -411,6 +411,25 @@ hpet_clkevt_set_next_event(unsigned long delta, struct clock_event_device *evt)
return res < HPET_MIN_CYCLES ? -ETIME : 0;
}
static void hpet_init_clockevent(struct hpet_channel *hc, unsigned int rating)
{
struct clock_event_device *evt = &hc->evt;
evt->rating = rating;
evt->irq = hc->irq;
evt->name = hc->name;
evt->cpumask = cpumask_of(hc->cpu);
evt->set_state_oneshot = hpet_clkevt_set_state_oneshot;
evt->set_next_event = hpet_clkevt_set_next_event;
evt->set_state_shutdown = hpet_clkevt_set_state_shutdown;
evt->features = CLOCK_EVT_FEAT_ONESHOT;
if (hc->boot_cfg & HPET_TN_PERIODIC) {
evt->features |= CLOCK_EVT_FEAT_PERIODIC;
evt->set_state_periodic = hpet_clkevt_set_state_periodic;
}
}
/*
* The HPET clock event device wrapped in a channel for conversion
*/
@ -510,22 +529,10 @@ static void init_one_hpet_msi_clockevent(struct hpet_channel *hc, int cpu)
hc->cpu = cpu;
per_cpu(cpu_hpet_channel, cpu) = hc;
evt->name = hc->name;
hpet_setup_msi_irq(hc);
evt->irq = hc->irq;
evt->rating = 110;
evt->features = CLOCK_EVT_FEAT_ONESHOT;
if (hc->boot_cfg & HPET_TN_PERIODIC) {
evt->features |= CLOCK_EVT_FEAT_PERIODIC;
evt->set_state_periodic = hpet_clkevt_set_state_periodic;
}
evt->set_state_shutdown = hpet_clkevt_set_state_shutdown;
evt->set_state_oneshot = hpet_clkevt_set_state_oneshot;
evt->set_next_event = hpet_clkevt_set_next_event;
hpet_init_clockevent(hc, 110);
evt->tick_resume = hpet_clkevt_msi_resume;
evt->cpumask = cpumask_of(hc->cpu);
clockevents_config_and_register(evt, hpet_freq, HPET_MIN_PROG_DELTA,
0x7FFFFFFF);