virt/kvm/eventfd.c

36 kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm_irqfd *args)
303 kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
315 	if (!kvm_arch_irqfd_allowed(kvm, args))
323 	irqfd->gsi = args->gsi;
329 	f = fdget(args->fd);
343 	if (args->flags & KVM_IRQFD_FLAG_RESAMPLE) {
346 		resamplefd = eventfd_ctx_fdget(args->resamplefd);
534 kvm_irqfd_deassign(struct kvm *kvm, struct kvm_irqfd *args)
539 	eventfd = eventfd_ctx_fdget(args->fd);
546 		if (irqfd->eventfd == eventfd && irqfd->gsi == args->gsi) {
574 kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
576 	if (args->flags & ~(KVM_IRQFD_FLAG_DEASSIGN | KVM_IRQFD_FLAG_RESAMPLE))
579 	if (args->flags & KVM_IRQFD_FLAG_DEASSIGN)
580 		return kvm_irqfd_deassign(kvm, args);
582 	return kvm_irqfd_assign(kvm, args);
825 				struct kvm_ioeventfd *args)
832 	eventfd = eventfd_ctx_fdget(args->fd);
843 	p->addr    = args->addr;
845 	p->length  = args->len;
849 	if (args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH)
850 		p->datamatch = args->datamatch;
888 			   struct kvm_ioeventfd *args)
896 	eventfd = eventfd_ctx_fdget(args->fd);
900 	wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH);
907 		    p->addr != args->addr  ||
908 		    p->length != args->len ||
912 		if (!p->wildcard && p->datamatch != args->datamatch)
930 static int kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
932 	enum kvm_bus bus_idx = ioeventfd_bus_from_flags(args->flags);
933 	int ret = kvm_deassign_ioeventfd_idx(kvm, bus_idx, args);
935 	if (!args->len && bus_idx == KVM_MMIO_BUS)
936 		kvm_deassign_ioeventfd_idx(kvm, KVM_FAST_MMIO_BUS, args);
942 kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
947 	bus_idx = ioeventfd_bus_from_flags(args->flags);
949 	switch (args->len) {
961 	if (args->addr + args->len < args->addr)
965 	if (args->flags & ~KVM_IOEVENTFD_VALID_FLAG_MASK)
969 	if (!args->len && (args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH))
972 	ret = kvm_assign_ioeventfd_idx(kvm, bus_idx, args);
979 	if (!args->len && bus_idx == KVM_MMIO_BUS) {
980 		ret = kvm_assign_ioeventfd_idx(kvm, KVM_FAST_MMIO_BUS, args);
988 	kvm_deassign_ioeventfd_idx(kvm, bus_idx, args);
994 kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
996 	if (args->flags & KVM_IOEVENTFD_FLAG_DEASSIGN)
997 		return kvm_deassign_ioeventfd(kvm, args);
999 	return kvm_assign_ioeventfd(kvm, args);