kvm: Add VFIO device

So far we've succeeded at making KVM and VFIO mostly unaware of each other, but areas are cropping up where a connection beyond eventfds and irqfds needs to be made. This patch introduces a KVM-VFIO device that is meant to be a gateway for such interaction. The user creates the device and can add and remove VFIO groups to it via file descriptors. When a group is added, KVM verifies the group is valid and gets a reference to it via the VFIO external user interface.

Alex Williamson committed 13 years ago

Commit ec535001 parent 84cffe48 files · +257 −1Browse files

Showing the changes to include/uapi/linux (1 of 8 files). Show all

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include/uapi/linux/kvm.h+4−0

@@ -845,6 +845,10 @@ struct kvm_device_attr { · 844 unmodified lines
845	845	#define KVM_DEV_TYPE_FSL_MPIC_20 1
846	846	#define KVM_DEV_TYPE_FSL_MPIC_42 2
847	847	#define KVM_DEV_TYPE_XICS 3
	848	+#define KVM_DEV_TYPE_VFIO 4
	849	+#define KVM_DEV_VFIO_GROUP 1
	850	+#define KVM_DEV_VFIO_GROUP_ADD 1
	851	+#define KVM_DEV_VFIO_GROUP_DEL 2
848	852
849	853	/*
850	854	* ioctls for VM fds