Cache coherency

A system, comprising a host device and a peripheral device, the host device including a processor, the peripheral device including:

• a host interface to be connected to a host device via a data communication bus;
• and at least one processing core to:
• expose a device emulation function to the host device;
• maintain a peripheral device cache;
• and
• invalidate a cache entry in the peripheral device cache in response to receiving a cache invalidation from a backend function;
• and
• execute a translation function to:
• translate between a format of the device emulation function and a format of the backend function;
• receive the cache invalidation from the backend function;
• translate the received cache invalidation to the format of the device emulation function yielding a translated cache invalidation;
• and
• provide the translated cache invalidation to the device emulation function being executed by the processor of the host device.

A method, comprising:

• exposing a device emulation function to a host device;
• maintaining a peripheral device cache;
• invalidating a cache entry in the peripheral device cache in response to receiving a cache invalidation from a backend function;
• translating between a format of the device emulation function and a format of the backend function;
• receiving the cache invalidation from the backend function;
• translating the received cache invalidation to the format of the device emulation function yielding a translated cache invalidation;
• and
• providing the translated cache invalidation to the device emulation function being executed by a processor of the host device.