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| author | Eric Auger <eric.auger@linaro.org> | 2015-09-18 22:29:44 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-01 15:06:46 +0200 |
| commit | 9016cfb577a15abd6a7990890ccf6bf1edf04d31 (patch) | |
| tree | cbfbb1d9a11fe1903731b08870354674ac1eb69c | |
| parent | 1a02b27035f82091d51ecafcb9ccaac1f31d4eb2 (diff) | |
| download | op-kernel-dev-9016cfb577a15abd6a7990890ccf6bf1edf04d31.zip op-kernel-dev-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>
| -rw-r--r-- | include/linux/kvm_irqfd.h | 2 | ||||
| -rw-r--r-- | virt/kvm/eventfd.c | 15 |
2 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/kvm_irqfd.h b/include/linux/kvm_irqfd.h index f926b39..0c1de05 100644 --- a/include/linux/kvm_irqfd.h +++ b/include/linux/kvm_irqfd.h @@ -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 */ 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 <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; |
