Commit 314ff527 authored by David S. Miller's avatar David S. Miller

sparc: Don't do expensive hypervisor PCR write unless necessary.

The hypervisor call is only necessary if hypervisor events are
being requested.

So if we're not tracking hypervisor events, simply do a direct
register write.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 15e3608d
......@@ -80,9 +80,12 @@ static void n2_pcr_write(u64 val)
{
unsigned long ret;
if (val & PCR_N2_HTRACE) {
ret = sun4v_niagara2_setperf(HV_N2_PERF_SPARC_CTL, val);
if (ret != HV_EOK)
write_pcr(val);
} else
write_pcr(val);
}
static const struct pcr_ops n2_pcr_ops = {
......
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