| 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 |