diff options
Diffstat (limited to 'drivers/cpuidle/cpuidle-haltpoll.c')
| -rw-r--r-- | drivers/cpuidle/cpuidle-haltpoll.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/cpuidle/cpuidle-haltpoll.c b/drivers/cpuidle/cpuidle-haltpoll.c index b0ce9bc78113..fcc53215bac8 100644 --- a/drivers/cpuidle/cpuidle-haltpoll.c +++ b/drivers/cpuidle/cpuidle-haltpoll.c @@ -18,6 +18,10 @@ #include <linux/kvm_para.h> #include <linux/cpuidle_haltpoll.h> +static bool force __read_mostly; +module_param(force, bool, 0444); +MODULE_PARM_DESC(force, "Load unconditionally"); + static struct cpuidle_device __percpu *haltpoll_cpuidle_devices; static enum cpuhp_state haltpoll_hp_state; @@ -90,6 +94,11 @@ static void haltpoll_uninit(void) haltpoll_cpuidle_devices = NULL; } +static bool haltpoll_want(void) +{ + return kvm_para_has_hint(KVM_HINTS_REALTIME) || force; +} + static int __init haltpoll_init(void) { int ret; @@ -101,8 +110,7 @@ static int __init haltpoll_init(void) cpuidle_poll_state_init(drv); - if (!kvm_para_available() || - !kvm_para_has_hint(KVM_HINTS_REALTIME)) + if (!kvm_para_available() || !haltpoll_want()) return -ENODEV; ret = cpuidle_register_driver(drv); |