Commit 9016cfb5 authored by Eric Auger's avatar Eric Auger Committed by Paolo Bonzini

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: default avatarEric Auger <eric.auger@linaro.org>
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 1a02b270
......@@ -64,6 +64,8 @@ struct kvm_kernel_irqfd {
struct list_head list;
poll_table pt;
struct work_struct shutdown;
struct irq_bypass_consumer consumer;
struct irq_bypass_producer *producer;
};
#endif /* __LINUX_KVM_IRQFD_H */
......@@ -35,6 +35,7 @@
#include <linux/srcu.h>
#include <linux/slab.h>
#include <linux/seqlock.h>
#include <linux/irqbypass.h>
#include <trace/events/kvm.h>
#include <kvm/iodev.h>
......@@ -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;
......
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