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Commit f70c20aa authored by Feng Wu's avatar Feng Wu Committed by Paolo Bonzini
Browse files

KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd' 



This patch adds an arch specific hooks 'arch_update' in
'struct kvm_kernel_irqfd'. On Intel side, it is used to
update the IRTE when VT-d posted-interrupts is used.

Signed-off-by: default avatarFeng Wu <feng.wu@intel.com>
Reviewed-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 9016cfb5

include/linux/kvm_host.h

+2 −0
Original line number Diff line number Diff line
@@ -1172,5 +1172,7 @@ void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *, 
			   struct irq_bypass_producer *);

void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);

void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);

int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,

				  uint32_t guest_irq, bool set);

#endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */

#endif

virt/kvm/eventfd.c

+18 −1
Original line number Diff line number Diff line
@@ -266,6 +266,13 @@ void __attribute__((weak)) kvm_arch_irq_bypass_start( 
				struct irq_bypass_consumer *cons)

{

}



int  __attribute__((weak)) kvm_arch_update_irqfd_routing(

				struct kvm *kvm, unsigned int host_irq,

				uint32_t guest_irq, bool set)

{

	return 0;

}

#endif



static int
@@ -586,9 +593,19 @@ void kvm_irq_routing_update(struct kvm *kvm) 


	spin_lock_irq(&kvm->irqfds.lock);



	list_for_each_entry(irqfd, &kvm->irqfds.items, list)

	list_for_each_entry(irqfd, &kvm->irqfds.items, list) {

		irqfd_update(kvm, irqfd);



#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS

		if (irqfd->producer) {

			int ret = kvm_arch_update_irqfd_routing(

					irqfd->kvm, irqfd->producer->irq,

					irqfd->gsi, 1);

			WARN_ON(ret);

		}

#endif

	}



	spin_unlock_irq(&kvm->irqfds.lock);

}