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Subject[v5 15/19] KVM: eventfd: add irq bypass consumer management
Date
From: Eric Auger <eric.auger@linaro.org>

This patch adds the registration/unregistration of an
irq_bypass_consumer on irqfd assignment/deassignment.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Feng Wu <feng.wu@intel.com>
---
virt/kvm/eventfd.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 647ffb8..4225eea 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -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 +141,7 @@ irqfd_shutdown(struct work_struct *work)
/*
* It is now safe to release the object's resources
*/
+ irq_bypass_unregister_consumer(&irqfd->consumer);
eventfd_ctx_put(irqfd->eventfd);
kfree(irqfd);
}
@@ -380,6 +382,11 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
*/
fdput(f);

+ irqfd->consumer.token = (void *)irqfd->eventfd;
+ kvm_arch_irq_consumer_init(&irqfd->consumer);
+ ret = irq_bypass_register_consumer(&irqfd->consumer);
+ WARN_ON(ret);
+
return 0;

fail:
--
2.1.0


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