mirror of https://gitee.com/openkylin/linux.git
42 lines
1.2 KiB
ReStructuredText
42 lines
1.2 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
|
|
|
|
===================
|
|
VFIO virtual device
|
|
===================
|
|
|
|
Device types supported:
|
|
|
|
- KVM_DEV_TYPE_VFIO
|
|
|
|
Only one VFIO instance may be created per VM. The created device
|
|
tracks VFIO groups in use by the VM and features of those groups
|
|
important to the correctness and acceleration of the VM. As groups
|
|
are enabled and disabled for use by the VM, KVM should be updated
|
|
about their presence. When registered with KVM, a reference to the
|
|
VFIO-group is held by KVM.
|
|
|
|
Groups:
|
|
KVM_DEV_VFIO_GROUP
|
|
|
|
KVM_DEV_VFIO_GROUP attributes:
|
|
KVM_DEV_VFIO_GROUP_ADD: Add a VFIO group to VFIO-KVM device tracking
|
|
kvm_device_attr.addr points to an int32_t file descriptor
|
|
for the VFIO group.
|
|
KVM_DEV_VFIO_GROUP_DEL: Remove a VFIO group from VFIO-KVM device tracking
|
|
kvm_device_attr.addr points to an int32_t file descriptor
|
|
for the VFIO group.
|
|
KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE: attaches a guest visible TCE table
|
|
allocated by sPAPR KVM.
|
|
kvm_device_attr.addr points to a struct::
|
|
|
|
struct kvm_vfio_spapr_tce {
|
|
__s32 groupfd;
|
|
__s32 tablefd;
|
|
};
|
|
|
|
where:
|
|
|
|
- @groupfd is a file descriptor for a VFIO group;
|
|
- @tablefd is a file descriptor for a TCE table allocated via
|
|
KVM_CREATE_SPAPR_TCE.
|