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/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);