[v5 15/19] KVM: eventfd: add irq bypass consumer management

From	Feng Wu <feng.wu@intel.com>
Newsgroups	linux.kernel
Subject	[v5 15/19] KVM: eventfd: add irq bypass consumer management
Date	2015-07-13 12:10 +0200
Message-ID	<pLIQq-3K2-21@gated-at.bofh.it> (permalink)
References	<pLIGK-3rw-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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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Thread

[v5 00/19] Add VT-d Posted-Interrupts support Feng Wu <feng.wu@intel.com> - 2015-07-13 12:00 +0200
  [v5 07/19] KVM: make kvm_set_msi_irq() public Feng Wu <feng.wu@intel.com> - 2015-07-13 12:00 +0200
  [v5 11/19] KVM: create kvm_irqfd.h Feng Wu <feng.wu@intel.com> - 2015-07-13 12:00 +0200
  [v5 06/19] KVM: Make struct kvm_irq_routing_table accessible Feng Wu <feng.wu@intel.com> - 2015-07-13 12:00 +0200
  [v5 17/19] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted Feng Wu <feng.wu@intel.com> - 2015-07-13 12:00 +0200
  [v5 01/19] KVM: Extend struct pi_desc for VT-d Posted-Interrupts Feng Wu <feng.wu@intel.com> - 2015-07-13 12:00 +0200
  [v5 10/19] KVM, x86: Select IRQ_BYPASS_MANAGER for KVM_INTEL Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 14/19] KVM: x86: Add arch specific routines for irqbypass manager Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 16/19] KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd' Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 18/19] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 02/19] KVM: Add some helper functions for Posted-Interrupts Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 13/19] KVM: x86: Update IRTE for posted-interrupts Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 15/19] KVM: eventfd: add irq bypass consumer management Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 12/19] KVM: eventfd: add irq bypass information in irqfd Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 05/19] KVM: Add interfaces to control PI outside vmx Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 09/19] vfio: Register/unregister irq_bypass_producer Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
    Re: [v5 09/19] vfio: Register/unregister irq_bypass_producer Eric Auger <eric.auger@linaro.org> - 2015-07-13 15:00 +0200
  [v5 03/19] KVM: Define a new interface kvm_intr_is_single_vcpu() Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200
  [v5 08/19] vfio: Select IRQ_BYPASS_MANAGER for vfio PCI devices Feng Wu <feng.wu@intel.com> - 2015-07-13 12:10 +0200

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