1/*
 2 * Split spinlock implementation out into its own file, so it can be
 3 * compiled in a FTRACE-compatible way.
 4 */
 5#include <linux/spinlock.h>
 6#include <linux/module.h>
 
 7
 8#include <asm/paravirt.h>
 9
10static inline void
11default_spin_lock_flags(arch_spinlock_t *lock, unsigned long flags)
12{
13	arch_spin_lock(lock);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
14}
15
16struct pv_lock_ops pv_lock_ops = {
17#ifdef CONFIG_SMP
18	.spin_is_locked = __ticket_spin_is_locked,
19	.spin_is_contended = __ticket_spin_is_contended,
20
21	.spin_lock = __ticket_spin_lock,
22	.spin_lock_flags = default_spin_lock_flags,
23	.spin_trylock = __ticket_spin_trylock,
24	.spin_unlock = __ticket_spin_unlock,
25#endif
26};
27EXPORT_SYMBOL(pv_lock_ops);
28

 1/*
 2 * Split spinlock implementation out into its own file, so it can be
 3 * compiled in a FTRACE-compatible way.
 4 */
 5#include <linux/spinlock.h>
 6#include <linux/export.h>
 7#include <linux/jump_label.h>
 8
 9#include <asm/paravirt.h>
10
11__visible void __native_queued_spin_unlock(struct qspinlock *lock)
 
12{
13	native_queued_spin_unlock(lock);
14}
15PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock);
16
17bool pv_is_native_spin_unlock(void)
18{
19	return pv_lock_ops.queued_spin_unlock.func ==
20		__raw_callee_save___native_queued_spin_unlock;
21}
22
23__visible bool __native_vcpu_is_preempted(int cpu)
24{
25	return false;
26}
27PV_CALLEE_SAVE_REGS_THUNK(__native_vcpu_is_preempted);
28
29bool pv_is_native_vcpu_is_preempted(void)
30{
31	return pv_lock_ops.vcpu_is_preempted.func ==
32		__raw_callee_save___native_vcpu_is_preempted;
33}
34
35struct pv_lock_ops pv_lock_ops = {
36#ifdef CONFIG_SMP
37	.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
38	.queued_spin_unlock = PV_CALLEE_SAVE(__native_queued_spin_unlock),
39	.wait = paravirt_nop,
40	.kick = paravirt_nop,
41	.vcpu_is_preempted = PV_CALLEE_SAVE(__native_vcpu_is_preempted),
42#endif /* SMP */
 
 
43};
44EXPORT_SYMBOL(pv_lock_ops);
45
46struct static_key paravirt_ticketlocks_enabled = STATIC_KEY_INIT_FALSE;
47EXPORT_SYMBOL(paravirt_ticketlocks_enabled);