US 8,527,666 B2 · Accessing a configuration space of a virtual function

Abstract

A computer implemented method includes receiving a request to access a configuration space that is associated with a virtual function. The request may include a configuration space address and a root complex identifier. The computer implemented method may include identifying a root complex based on the root complex identifier. The computer implemented method may also include selecting a slot that is associated with the root complex. The slot may be capable of coupling a hardware input/output adapter to the root complex. The computer implemented method may further include determining whether the configuration space address is associated with the selected slot. The computer implemented method may include accessing the configuration space using an access mechanism in response to determining that the configuration space address is associated with the selected slot.

Claims20

Dependent claims

A computer implemented method, comprising:

receiving, by a high level access mechanism, a request to access a configuration space that is associated with a virtual function, the request including a configuration space address and a root complex identifier;
identifying, by the high level access mechanism, a first root complex of a plurality of root complexes based on the root complex identifier;
selecting, by the high level access mechanism, a slot that is associated with the first root complex, the slot capable of coupling a hardware input/output adapter to the first root complex;
determining, by the high level access mechanism, whether the configuration space address is associated with the selected slot;
and
accessing, by the high level access mechanism, the configuration space using a low level access mechanism in response to determining that the configuration space address is associated with the selected slot.

3 more elements

A computer program product comprising a non-transitory computer storage medium having computer program code embodied therewith, the computer program code executable by a processor to:

receive a configuration request to provision a virtual function of a hardware input/output adapter that is capable of hosting multiple virtual functions;
provision the virtual function at the hardware input/output adapter;
create an entry in a table for the provisioned virtual function, the table stored in a local memory accessible by a high level access mechanism, wherein creating the entry in the table for the provisioned virtual function includes:
identifying a configuration space address of a configuration space that is associated with the provisioned virtual function;
storing a device identifier of the provisioned virtual function with the identified configuration space address of the provisioned virtual function in the entry in the table for the provisioned virtual function, wherein the device identifier is determined from the configuration space that is associated with the provisioned virtual function;
and
storing a vendor identifier of the provisioned virtual function with the identified configuration space address of the provisioned virtual function in the entry in the table for the provisioned virtual function, wherein the vendor identifier is determined from the configuration space that is associated with the provisioned virtual function;
and
send a response to the configuration request, the response including the identified configuration space address that is associated with the provisioned virtual function.

6 more elements

Dependencies are inferred from the claim text.

Accessing a configuration space of a virtual function

Life of this patent

Accessing a configuration space of a virtual function

Life of this patent

Abstract

Claims20