Re: [Qemu-devel] Towards an ivshmem 2.0?

[Stefan Hajnoczi]

On Mon, Jan 16, 2017 at 09:36:51AM +0100, Jan Kiszka wrote:
> some of you may know that we are using a shared memory device similar to
> ivshmem in the partitioning hypervisor Jailhouse [1].
> 
> We started as being compatible to the original ivshmem that QEMU
> implements, but we quickly deviated in some details, and in the recent
> months even more. Some of the deviations are related to making the
> implementation simpler. The new ivshmem takes <500 LoC - Jailhouse is
> aiming at safety critical systems and, therefore, a small code base.
> Other changes address deficits in the original design, like missing
> life-cycle management.

My first thought is "what about virtio?".  Can you share some background
on why ivshmem fits the use case better than virtio?

The reason I ask is because the ivshmem devices you define would have
parallels to existing virtio devices and this could lead to duplication.

Stefan

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