From 9016cfb577a15abd6a7990890ccf6bf1edf04d31 Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Fri, 18 Sep 2015 22:29:44 +0800 Subject: KVM: eventfd: add irq bypass consumer management This patch adds the registration/unregistration of an irq_bypass_consumer on irqfd assignment/deassignment. Signed-off-by: Eric Auger Signed-off-by: Feng Wu Reviewed-by: Alex Williamson Signed-off-by: Paolo Bonzini --- virt/kvm/eventfd.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'virt/kvm') diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index c4f7abe..7df356d 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include @@ -140,6 +141,9 @@ irqfd_shutdown(struct work_struct *work) /* * It is now safe to release the object's resources */ +#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS + irq_bypass_unregister_consumer(&irqfd->consumer); +#endif eventfd_ctx_put(irqfd->eventfd); kfree(irqfd); } @@ -391,6 +395,17 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args) * we might race against the POLLHUP */ fdput(f); +#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS + irqfd->consumer.token = (void *)irqfd->eventfd; + irqfd->consumer.add_producer = kvm_arch_irq_bypass_add_producer; + irqfd->consumer.del_producer = kvm_arch_irq_bypass_del_producer; + irqfd->consumer.stop = kvm_arch_irq_bypass_stop; + irqfd->consumer.start = kvm_arch_irq_bypass_start; + ret = irq_bypass_register_consumer(&irqfd->consumer); + if (ret) + pr_info("irq bypass consumer (token %p) registration fails: %d\n", + irqfd->consumer.token, ret); +#endif return 0; -- cgit v1.1