Based on kernel version 4.16.1. Page generated on 2018-04-09 11:53 EST.
1 VFIO virtual device 2 =================== 3 4 Device types supported: 5 KVM_DEV_TYPE_VFIO 6 7 Only one VFIO instance may be created per VM. The created device 8 tracks VFIO groups in use by the VM and features of those groups 9 important to the correctness and acceleration of the VM. As groups 10 are enabled and disabled for use by the VM, KVM should be updated 11 about their presence. When registered with KVM, a reference to the 12 VFIO-group is held by KVM. 13 14 Groups: 15 KVM_DEV_VFIO_GROUP 16 17 KVM_DEV_VFIO_GROUP attributes: 18 KVM_DEV_VFIO_GROUP_ADD: Add a VFIO group to VFIO-KVM device tracking 19 kvm_device_attr.addr points to an int32_t file descriptor 20 for the VFIO group. 21 KVM_DEV_VFIO_GROUP_DEL: Remove a VFIO group from VFIO-KVM device tracking 22 kvm_device_attr.addr points to an int32_t file descriptor 23 for the VFIO group. 24 KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE: attaches a guest visible TCE table 25 allocated by sPAPR KVM. 26 kvm_device_attr.addr points to a struct: 27 28 struct kvm_vfio_spapr_tce { 29 __s32 groupfd; 30 __s32 tablefd; 31 }; 32 33 where 34 @groupfd is a file descriptor for a VFIO group; 35 @tablefd is a file descriptor for a TCE table allocated via 36 KVM_CREATE_SPAPR_TCE.