Add helpers to wake and query a blocking vCPU. In addition to providing
nice names, the helpers reduce the probability of KVM neglecting to use
kvm_arch_vcpu_get_wait().
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <
20211009021236.4122790-20-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
{
struct arch_timer_cpu *timer = vcpu_timer(vcpu);
struct timer_map map;
- struct rcuwait *wait = kvm_arch_vcpu_get_wait(vcpu);
if (unlikely(!timer->enabled))
return;
if (map.emul_ptimer)
soft_timer_cancel(&map.emul_ptimer->hrtimer);
- if (rcuwait_active(wait))
+ if (kvm_vcpu_is_blocking(vcpu))
kvm_timer_blocking(vcpu);
/*
kvm_for_each_vcpu(i, vcpu, kvm) {
vcpu->arch.pause = false;
- rcuwait_wake_up(kvm_arch_vcpu_get_wait(vcpu));
+ __kvm_vcpu_wake_up(vcpu);
}
}
/* If the preempt notifier has already run, it also called apic_timer_expired */
if (!apic->lapic_timer.hv_timer_in_use)
goto out;
- WARN_ON(rcuwait_active(&vcpu->wait));
+ WARN_ON(kvm_vcpu_is_blocking(vcpu));
apic_timer_expired(apic, false);
cancel_hv_timer(apic);
#endif
}
+/*
+ * Wake a vCPU if necessary, but don't do any stats/metadata updates. Returns
+ * true if the vCPU was blocking and was awakened, false otherwise.
+ */
+static inline bool __kvm_vcpu_wake_up(struct kvm_vcpu *vcpu)
+{
+ return !!rcuwait_wake_up(kvm_arch_vcpu_get_wait(vcpu));
+}
+
+static inline bool kvm_vcpu_is_blocking(struct kvm_vcpu *vcpu)
+{
+ return rcuwait_active(kvm_arch_vcpu_get_wait(vcpu));
+}
+
#ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
/*
* returns true if the virtual interrupt controller is initialized and
trace_kvm_async_pf_completed(addr, cr2_or_gpa);
- rcuwait_wake_up(kvm_arch_vcpu_get_wait(vcpu));
+ __kvm_vcpu_wake_up(vcpu);
mmput(mm);
kvm_put_kvm(vcpu->kvm);
bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu)
{
- struct rcuwait *waitp;
-
- waitp = kvm_arch_vcpu_get_wait(vcpu);
- if (rcuwait_wake_up(waitp)) {
+ if (__kvm_vcpu_wake_up(vcpu)) {
WRITE_ONCE(vcpu->ready, true);
++vcpu->stat.generic.halt_wakeup;
return true;
continue;
if (vcpu == me)
continue;
- if (rcuwait_active(kvm_arch_vcpu_get_wait(vcpu)) &&
- !vcpu_dy_runnable(vcpu))
+ if (kvm_vcpu_is_blocking(vcpu) && !vcpu_dy_runnable(vcpu))
continue;
if (READ_ONCE(vcpu->preempted) && yield_to_kernel_mode &&
!kvm_arch_dy_has_pending_interrupt(vcpu) &&