Commit 362c698f authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

KVM: x86: extract blocking logic from __vcpu_run 



Rename the old __vcpu_run to vcpu_run, and extract part of it to a new
function vcpu_block.

The next patch will add a new condition in vcpu_block, avoid extra
indentation.

Reviewed-by: default avatarDavid Matlack <dmatlack@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 35fd68a3

arch/x86/kvm/x86.c

+34 −28
Original line number Diff line number Diff line
@@ -6186,7 +6186,7 @@ void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, 
}



/*

 * Returns 1 to let __vcpu_run() continue the guest execution loop without

 * Returns 1 to let vcpu_run() continue the guest execution loop without

 * exiting to the userspace.  Otherwise, the value will be returned to the

 * userspace.

 */
@@ -6404,24 +6404,15 @@ out: 
	return r;

}





static int __vcpu_run(struct kvm_vcpu *vcpu)

static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)

{

	int r;

	struct kvm *kvm = vcpu->kvm;



	vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);



	r = 1;

	while (r > 0) {

		if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&

		    !vcpu->arch.apf.halted)

			r = vcpu_enter_guest(vcpu);

		else {

	srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);

	kvm_vcpu_block(vcpu);

	vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);

			if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) {



	if (!kvm_check_request(KVM_REQ_UNHALT, vcpu))

		return 1;



	kvm_apic_accept_events(vcpu);

	switch(vcpu->arch.mp_state) {

	case KVM_MP_STATE_HALTED:
@@ -6434,12 +6425,25 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) 
	case KVM_MP_STATE_INIT_RECEIVED:

		break;

	default:

					r = -EINTR;

		return -EINTR;

		break;

	}

	return 1;

}

		}



static int vcpu_run(struct kvm_vcpu *vcpu)

{

	int r;

	struct kvm *kvm = vcpu->kvm;



	vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);



	for (;;) {

		if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&

		    !vcpu->arch.apf.halted)

			r = vcpu_enter_guest(vcpu);

		else

			r = vcpu_block(kvm, vcpu);

		if (r <= 0)

			break;
@@ -6451,6 +6455,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) 
			r = -EINTR;

			vcpu->run->exit_reason = KVM_EXIT_INTR;

			++vcpu->stat.request_irq_exits;

			break;

		}



		kvm_check_async_pf_completion(vcpu);
@@ -6459,6 +6464,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) 
			r = -EINTR;

			vcpu->run->exit_reason = KVM_EXIT_INTR;

			++vcpu->stat.signal_exits;

			break;

		}

		if (need_resched()) {

			srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
@@ -6590,7 +6596,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) 
	} else

		WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed);



	r = __vcpu_run(vcpu);

	r = vcpu_run(vcpu);



out:

	post_kvm_run_save(vcpu);

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