Linux Audio
Check our new training course
Embedded Linux Audio
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
// SPDX-License-Identifier: GPL-2.0 /* * Split spinlock implementation out into its own file, so it can be * compiled in a FTRACE-compatible way. */ #include <linux/spinlock.h> #include <linux/export.h> #include <linux/jump_label.h> #include <asm/paravirt.h> __visible void __native_queued_spin_unlock(struct qspinlock *lock) { native_queued_spin_unlock(lock); } PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock); bool pv_is_native_spin_unlock(void) { return pv_ops.lock.queued_spin_unlock.func == __raw_callee_save___native_queued_spin_unlock; } __visible bool __native_vcpu_is_preempted(long cpu) { return false; } PV_CALLEE_SAVE_REGS_THUNK(__native_vcpu_is_preempted); bool pv_is_native_vcpu_is_preempted(void) { return pv_ops.lock.vcpu_is_preempted.func == __raw_callee_save___native_vcpu_is_preempted; } void __init paravirt_set_cap(void) { if (!pv_is_native_spin_unlock()) setup_force_cpu_cap(X86_FEATURE_PVUNLOCK); if (!pv_is_native_vcpu_is_preempted()) setup_force_cpu_cap(X86_FEATURE_VCPUPREEMPT); }