Re: [Qemu-devel] Queries on dataplane mechanism

[Stefan Hajnoczi]

On Tue, Jun 28, 2016 at 02:36:41PM +0530, Gaurav Sharma wrote:
> I am working on something to move PCI devices to data plane architecture.
> Do you know any know reasons, as to why this was not tried before ?

The dataplane approach is implemented on a per-device basis because it
involves registering an ioeventfd to trigger on a hardware register
access.

It's only worth doing for performance-critical devices (and performance
critical hardware registers in those devices).

Stefan

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