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