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authorEric Auger <eric.auger@linaro.org>2015-09-18 22:29:44 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2015-10-01 15:06:46 +0200
commit9016cfb577a15abd6a7990890ccf6bf1edf04d31 (patch)
treecbfbb1d9a11fe1903731b08870354674ac1eb69c /virt
parent1a02b27035f82091d51ecafcb9ccaac1f31d4eb2 (diff)
downloadlinux-linaro-stable-9016cfb577a15abd6a7990890ccf6bf1edf04d31.tar.gz
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 <eric.auger@linaro.org> Signed-off-by: Feng Wu <feng.wu@intel.com> Reviewed-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/eventfd.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index c4f7abec4261..7df356d8f1fd 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 +141,9 @@ 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;