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path: root/drivers/cpuidle/cpuidle-haltpoll.c
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Diffstat (limited to 'drivers/cpuidle/cpuidle-haltpoll.c')
-rw-r--r--drivers/cpuidle/cpuidle-haltpoll.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/cpuidle/cpuidle-haltpoll.c b/drivers/cpuidle/cpuidle-haltpoll.c
index b0ce9bc78113..db124bc1ca2c 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 haltpool_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() || !haltpool_want())
return -ENODEV;
ret = cpuidle_register_driver(drv);