Cc: Avi Kivity <avi@xxxxxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
---
Documentation/virtual/kvm/api.txt | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 2d510b6..d1150b6 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1450,6 +1450,33 @@ is supported; 2 if the processor requires all virtual machines to have
an RMA, or 1 if the processor can use an RMA but doesn't require it,
because it supports the Virtual RMA (VRMA) facility.
+4.64 KVM_IRQFD
+
+Capability: KVM_CAP_IRQFD
+Architectures: all
+Type: vm ioctl
+Parameters: struct kvm_irqfd (in)
+Returns: 0 on success, !0 on error
+
+This ioctl attaches or detaches an eventfd to a GSI within the guest.
+While the eventfd is assigned to the guest, any write to the eventfd
+would trigger the GSI within the guest.
+
+struct kvm_irqfd {
+ __u32 fd;
+ __u32 gsi;
+ __u32 flags;
+ __u8 pad[20];
+};
+
+The following flags are defined:
+
+#define KVM_IRQFD_FLAG_DEASSIGN (1 << 0)
+
+If deassign flag is set, the eventfd will be deassigned from the GSI and
+further writes to the eventfd won't trigger the GSI.
+
+
5. The kvm_run structure
Application code obtains a pointer to the kvm_run structure by
--
1.7.6.1
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