COMMAND TRAPPING IN AN INPUT/OUTPUT VIRTUALIZATION (IOV) HOST CONTROLLER (HC) (IOV-HC) OF A FLASH-MEMORY-BASED STORAGE DEVICE

摘要

Command trapping in an input/output virtualization (IOV) host controller (HC) (IOV-HC) of a flash-memory-based storage device is disclosed. In one aspect, an IOV-HC is configured to receive a request from a client register interface (CRI) of one of multiple input/output (I/O) clients. The IOV-HC inspects a content of the request prior to the request being passed to a transport protocol engine. Based on the content, the IOV-HC determines whether the request should be further processed or should be trapped. If the IOV-HC determines that the request should be trapped, the IOV-HC traps the request using a request trap. In some aspects, the IOV-HC generates an interrupt to a virtual machine manager (VMM) to notify the VMM that the request was trapped. In some aspects, the IOV-HC provides a response generation circuit to receive instructions from the VMM to generate a response to the CRI from which the trapped request originated.

主权项

1. An input/output virtualization (IOV) host controller (HC) (IOV-HC) communicatively coupled to a plurality of input/output (I/O) clients via a corresponding plurality of client register interfaces (CRIs), and to a flash-memory-based storage device;
the IOV-HC comprising a request trap; and the IOV-HC configured to:
receive, by a request filter circuit of the IOV-HC, a request directed to the flash-memory-based storage device from a CRI of the plurality of CRIs;inspect, by the request filter circuit, a content of the request;determine, by the request filter circuit, whether the request should be forwarded to the flash-memory-based storage device for processing or should be trapped, based on the content;responsive to determining that the request should be forwarded to the flash-memory-based storage device for processing, forward the request to the flash-memory-based storage device; andresponsive to determining that the request should be trapped, trap the request in the request trap.