1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Split spinlock implementation out into its own file, so it can be
 4 * compiled in a FTRACE-compatible way.
 5 */
 6#include <linux/spinlock.h>
 7#include <linux/export.h>
 8#include <linux/jump_label.h>
 9
10#include <asm/paravirt.h>
11
 
12__visible void __native_queued_spin_unlock(struct qspinlock *lock)
13{
14	native_queued_spin_unlock(lock);
15}
 
16PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock);
17
18bool pv_is_native_spin_unlock(void)
19{
20	return pv_ops.lock.queued_spin_unlock.func ==
21		__raw_callee_save___native_queued_spin_unlock;
22}
 
23
24__visible bool __native_vcpu_is_preempted(long cpu)
25{
26	return false;
27}
28PV_CALLEE_SAVE_REGS_THUNK(__native_vcpu_is_preempted);
 
 
 
 
 
 
 
 
 
29
30bool pv_is_native_vcpu_is_preempted(void)
31{
32	return pv_ops.lock.vcpu_is_preempted.func ==
33		__raw_callee_save___native_vcpu_is_preempted;
34}

 
 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#include <linux/jump_label.h>
 8
 9#include <asm/paravirt.h>
10
11#ifdef CONFIG_QUEUED_SPINLOCKS
12__visible void __native_queued_spin_unlock(struct qspinlock *lock)
13{
14	native_queued_spin_unlock(lock);
15}
16
17PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock);
18
19bool pv_is_native_spin_unlock(void)
20{
21	return pv_lock_ops.queued_spin_unlock.func ==
22		__raw_callee_save___native_queued_spin_unlock;
23}
24#endif
25
26struct pv_lock_ops pv_lock_ops = {
27#ifdef CONFIG_SMP
28#ifdef CONFIG_QUEUED_SPINLOCKS
29	.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
30	.queued_spin_unlock = PV_CALLEE_SAVE(__native_queued_spin_unlock),
31	.wait = paravirt_nop,
32	.kick = paravirt_nop,
33#else /* !CONFIG_QUEUED_SPINLOCKS */
34	.lock_spinning = __PV_IS_CALLEE_SAVE(paravirt_nop),
35	.unlock_kick = paravirt_nop,
36#endif /* !CONFIG_QUEUED_SPINLOCKS */
37#endif /* SMP */
38};
39EXPORT_SYMBOL(pv_lock_ops);
40
41struct static_key paravirt_ticketlocks_enabled = STATIC_KEY_INIT_FALSE;
42EXPORT_SYMBOL(paravirt_ticketlocks_enabled);