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Commit c9a5ecca authored by Andrey Smetanin's avatar Andrey Smetanin Committed by Paolo Bonzini
Browse files

kvm/eventfd: add arch-specific set_irq 



Allow for arch-specific interrupt types to be set.  For that, add
kvm_arch_set_irq() which takes interrupt type-specific action if it
recognizes the interrupt type given, and -EWOULDBLOCK otherwise.

The default implementation always returns -EWOULDBLOCK.

Signed-off-by: default avatarAndrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: default avatarRoman Kagan <rkagan@virtuozzo.com>
Signed-off-by: default avatarDenis V. Lunev <den@openvz.org>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent ba1aefcd

include/linux/kvm_host.h

+4 −0
Original line number Diff line number Diff line
@@ -828,6 +828,10 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level, 
int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);

int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,

		int irq_source_id, int level, bool line_status);



int kvm_arch_set_irq(struct kvm_kernel_irq_routing_entry *irq, struct kvm *kvm,

		     int irq_source_id, int level, bool line_status);



bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);

void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);

void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);

virt/kvm/eventfd.c

+12 −1
Original line number Diff line number Diff line
@@ -171,6 +171,15 @@ irqfd_deactivate(struct kvm_kernel_irqfd *irqfd) 
	queue_work(irqfd_cleanup_wq, &irqfd->shutdown);

}



int __attribute__((weak)) kvm_arch_set_irq(

				struct kvm_kernel_irq_routing_entry *irq,

				struct kvm *kvm, int irq_source_id,

				int level,

				bool line_status)

{

	return -EWOULDBLOCK;

}



/*

 * Called with wqh->lock held and interrupts disabled

 */
@@ -195,7 +204,9 @@ irqfd_wakeup(wait_queue_t *wait, unsigned mode, int sync, void *key) 
		if (irq.type == KVM_IRQ_ROUTING_MSI)

			kvm_set_msi(&irq, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1,

					false);

		else

		else if (kvm_arch_set_irq(&irq, kvm,

					  KVM_USERSPACE_IRQ_SOURCE_ID, 1,

					  false) == -EWOULDBLOCK)

			schedule_work(&irqfd->inject);

		srcu_read_unlock(&kvm->irq_srcu, idx);

	}