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2f5947dfca
Renaming docs seems to be en vogue at the moment, so fix on of the
grossly misnamed directories. We usually never use "virtual" as
a shortcut for virtualization in the kernel, but always virt,
as seen in the virt/ top-level directory. Fix up the documentation
to match that.
Fixes: ed16648eb5 ("Move kvm, uml, and lguest subdirectories under a common "virtual" directory, I.E:")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
37 lines
1.1 KiB
Plaintext
37 lines
1.1 KiB
Plaintext
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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