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-rw-r--r--Documentation/virtual/kvm/api.txt17
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diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 930126698a0f..2c9948379469 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1930,6 +1930,23 @@ The "pte_enc" field provides a value that can OR'ed into the hash
1930PTE's RPN field (ie, it needs to be shifted left by 12 to OR it 1930PTE's RPN field (ie, it needs to be shifted left by 12 to OR it
1931into the hash PTE second double word). 1931into the hash PTE second double word).
1932 1932
19334.75 KVM_IRQFD
1934
1935Capability: KVM_CAP_IRQFD
1936Architectures: x86
1937Type: vm ioctl
1938Parameters: struct kvm_irqfd (in)
1939Returns: 0 on success, -1 on error
1940
1941Allows setting an eventfd to directly trigger a guest interrupt.
1942kvm_irqfd.fd specifies the file descriptor to use as the eventfd and
1943kvm_irqfd.gsi specifies the irqchip pin toggled by this event. When
1944an event is tiggered on the eventfd, an interrupt is injected into
1945the guest using the specified gsi pin. The irqfd is removed using
1946the KVM_IRQFD_FLAG_DEASSIGN flag, specifying both kvm_irqfd.fd
1947and kvm_irqfd.gsi.
1948
1949
19335. The kvm_run structure 19505. The kvm_run structure
1934------------------------ 1951------------------------
1935 1952