Always accessing the compare register via the CM redirect region is
(relatively) slow. If the timer being updated is the current CPUs
then this can be shortcutted by writing to the CM VP local region.
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
static int gic_next_event(unsigned long delta, struct clock_event_device *evt)
{
+ int cpu = cpumask_first(evt->cpumask);
u64 cnt;
int res;
cnt = gic_read_count();
cnt += (u64)delta;
- write_gic_vl_other(mips_cm_vp_id(cpumask_first(evt->cpumask)));
- write_gic_vo_compare(cnt);
+ if (cpu == raw_smp_processor_id()) {
+ write_gic_vl_compare(cnt);
+ } else {
+ write_gic_vl_other(mips_cm_vp_id(cpu));
+ write_gic_vo_compare(cnt);
+ }
res = ((int)(gic_read_count() - cnt) >= 0) ? -ETIME : 0;
return res;
}