Rusty Russell wrote:
This attempts to implement a "virtual I/O" layer which should allow
common drivers to be efficiently used across most virtual I/O
mechanisms. It will no-doubt need further enhancement.
The details of probing the device are left to hypervisor-specific
code: it simple constructs the "struct virtio_device" and hands it to
the probe function (eg. virtnet_probe() or virtblk_probe()).
The virtio drivers add and detach input and output buffers; as the
buffers are used up their associated "used" pointers are filled in.
I have written two virtio device drivers (net and block) and two
virtio implementations (for lguest): a read-write socket-style
implementation, and a more efficient descriptor-based implementation).
These should work for s390 afaics. They seem to fit the requirements
of network IO.
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