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 }
16 PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock);
17
18 bool 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 }
28 PV_CALLEE_SAVE_REGS_THUNK(__native_vcpu_is_preempted);
29
30 bool 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 }
35
36 void __init paravirt_set_cap(void)
37 {
38 if (!pv_is_native_spin_unlock())
39 setup_force_cpu_cap(X86_FEATURE_PVUNLOCK);
40
41 if (!pv_is_native_vcpu_is_preempted())
42 setup_force_cpu_cap(X86_FEATURE_VCPUPREEMPT);
43 }
44
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