[PATCH 2/4] kvm: Add missing KVM_IRQFD API documentation
From: Alex Williamson <hidden>
Date: 2012-06-22 22:16:03
Also in:
lkml
Subsystem:
documentation, the rest · Maintainers:
Jonathan Corbet, Linus Torvalds
Signed-off-by: Alex Williamson <redacted> --- Documentation/virtual/kvm/api.txt | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 310fe50..9b4cb2b 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt@@ -1965,6 +1965,23 @@ return the hash table order in the parameter. (If the guest is using the virtualized real-mode area (VRMA) facility, the kernel will re-create the VMRA HPTEs on the next KVM_RUN of any vcpu.) +4.76 KVM_IRQFD + +Capability: KVM_CAP_IRQFD +Architectures: x86 +Type: vm ioctl +Parameters: struct kvm_irqfd (in) +Returns: 0 on success, -1 on error + +Allows setting an eventfd to directly trigger a guest interrupt +kvm_irqfd.fd specifies the file descriptor to use as the eventfd and +kvm_irqfd.gsi specifies the irqchip pin toggled by this event. By +default this interface only supports edge triggered interrupts, +meaning the specified gsi is asserted and immediately de-asserted +when the eventfd is triggered. Specifying KVM_IRQFD_FLAG_DEASSIGN +removes the previously set irqfd matching both kvm_irqfd.fd and +kvm_irqfd.gsi. + 5. The kvm_run structure ------------------------