summaryrefslogtreecommitdiffstats
path: root/virt/kvm/kvm_main.c
diff options
context:
space:
mode:
Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c68
1 files changed, 34 insertions, 34 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2d26a898ac6c..6c0bd9a8e27e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -5223,6 +5223,38 @@ static struct notifier_block kvm_reboot_notifier = {
.priority = 0,
};
+static int kvm_suspend(void)
+{
+ /*
+ * Secondary CPUs and CPU hotplug are disabled across the suspend/resume
+ * callbacks, i.e. no need to acquire kvm_lock to ensure the usage count
+ * is stable. Assert that kvm_lock is not held to ensure the system
+ * isn't suspended while KVM is enabling hardware. Hardware enabling
+ * can be preempted, but the task cannot be frozen until it has dropped
+ * all locks (userspace tasks are frozen via a fake signal).
+ */
+ lockdep_assert_not_held(&kvm_lock);
+ lockdep_assert_irqs_disabled();
+
+ if (kvm_usage_count)
+ hardware_disable_nolock(NULL);
+ return 0;
+}
+
+static void kvm_resume(void)
+{
+ lockdep_assert_not_held(&kvm_lock);
+ lockdep_assert_irqs_disabled();
+
+ if (kvm_usage_count)
+ WARN_ON_ONCE(__hardware_enable_nolock());
+}
+
+static struct syscore_ops kvm_syscore_ops = {
+ .suspend = kvm_suspend,
+ .resume = kvm_resume,
+};
+
static void kvm_io_bus_destroy(struct kvm_io_bus *bus)
{
int i;
@@ -5801,38 +5833,6 @@ static void kvm_init_debug(void)
}
}
-static int kvm_suspend(void)
-{
- /*
- * Secondary CPUs and CPU hotplug are disabled across the suspend/resume
- * callbacks, i.e. no need to acquire kvm_lock to ensure the usage count
- * is stable. Assert that kvm_lock is not held to ensure the system
- * isn't suspended while KVM is enabling hardware. Hardware enabling
- * can be preempted, but the task cannot be frozen until it has dropped
- * all locks (userspace tasks are frozen via a fake signal).
- */
- lockdep_assert_not_held(&kvm_lock);
- lockdep_assert_irqs_disabled();
-
- if (kvm_usage_count)
- hardware_disable_nolock(NULL);
- return 0;
-}
-
-static void kvm_resume(void)
-{
- lockdep_assert_not_held(&kvm_lock);
- lockdep_assert_irqs_disabled();
-
- if (kvm_usage_count)
- WARN_ON_ONCE(__hardware_enable_nolock());
-}
-
-static struct syscore_ops kvm_syscore_ops = {
- .suspend = kvm_suspend,
- .resume = kvm_resume,
-};
-
static inline
struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
{
@@ -5948,6 +5948,7 @@ int kvm_init(unsigned vcpu_size, unsigned vcpu_align, struct module *module)
return r;
register_reboot_notifier(&kvm_reboot_notifier);
+ register_syscore_ops(&kvm_syscore_ops);
/* A kmem cache lets us meet the alignment requirements of fx_save. */
if (!vcpu_align)
@@ -5982,8 +5983,6 @@ int kvm_init(unsigned vcpu_size, unsigned vcpu_align, struct module *module)
kvm_chardev_ops.owner = module;
- register_syscore_ops(&kvm_syscore_ops);
-
kvm_preempt_ops.sched_in = kvm_sched_in;
kvm_preempt_ops.sched_out = kvm_sched_out;
@@ -6017,6 +6016,7 @@ out_free_4:
free_cpumask_var(per_cpu(cpu_kick_mask, cpu));
kmem_cache_destroy(kvm_vcpu_cache);
out_free_3:
+ unregister_syscore_ops(&kvm_syscore_ops);
unregister_reboot_notifier(&kvm_reboot_notifier);
cpuhp_remove_state_nocalls(CPUHP_AP_KVM_ONLINE);
return r;