Add paravirt preempt hint print prompt together with steal timer
information, so that it is easy to check whether paravirt preempt hint
feature is enabled or not.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
arch/loongarch/kernel/paravirt.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/loongarch/kernel/paravirt.c b/arch/loongarch/kernel/paravirt.c
index b99404b6b13f..b7ea511c288b 100644
--- a/arch/loongarch/kernel/paravirt.c
+++ b/arch/loongarch/kernel/paravirt.c
@@ -294,6 +294,7 @@ static struct notifier_block pv_reboot_nb = {
int __init pv_time_init(void)
{
int r;
+ bool pv_preempted = false;
if (!kvm_para_has_feature(KVM_FEATURE_STEAL_TIME))
return 0;
@@ -316,8 +317,10 @@ int __init pv_time_init(void)
return r;
}
- if (kvm_para_has_feature(KVM_FEATURE_PREEMPT_HINT))
+ if (kvm_para_has_feature(KVM_FEATURE_PREEMPT_HINT)) {
mp_ops.vcpu_is_preempted = pv_vcpu_is_preempted;
+ pv_preempted = true;
+ }
#endif
static_call_update(pv_steal_clock, paravt_steal_clock);
@@ -328,7 +331,10 @@ int __init pv_time_init(void)
static_key_slow_inc(¶virt_steal_rq_enabled);
#endif
- pr_info("Using paravirt steal-time\n");
+ if (pv_preempted)
+ pr_info("Using paravirt steal-time with preempt hint enabled\n");
+ else
+ pr_info("Using paravirt steal-time with preempt hint disabled\n");
return 0;
}
--
2.39.3