Re: [RFC] virtio testing framework

I mean,what's the purpose of using "NuttX RTOS on RV in a web browser using
TinyEMU + VirtIO" ?

On Fri, May 31, 2024 at 6:07 AM Emil Tsalapatis <emil@etsalapatis.com>
wrote:

> Not sure about the followup, but the patch I describe in the original post
> allows us to write and run tests for virtio drivers inside a VM. I
> originally wrote this because we have tests for the virtiofs paravirt
> device where we need to run both the paravirt driver and the device
> emulation in the same machine. The virtio stack is not designed for this -
> it expects the virtio driver to be running in the guest, and device
> emulation to be running in the host. This patchset introduces a way to
> emulate a virtio device in the guest for the purpose of running these
> virtiofs tests. The links in the original email describe the design in more
> detail, but just to reiterate, the code in this patch makes no functional
> changes to existing code.
>
> --Emil
>
> On Thu, May 30, 2024 at 6:19 PM Mario Marietto <marietto2008@gmail.com>
> wrote:
>
>> Can someone explain to me what the purpose of what you are talking about
>> ?
>>
>>
>> On Thu, May 30, 2024 at 10:38 PM Tomek CEDRO <tomek@cedro.info> wrote:
>>
>>> Awesome!! Congrats :-)
>>>
>>> Here is some example of running NuttX RTOS on RV in a web browser using
>>> TinyEMU + VirtIO :-)
>>>
>>> https://github.com/lupyuen/nuttx-tinyemu
>>>
>>> --
>>> CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
>>>
>>> On Thu, May 30, 2024, 22:16 Emil Tsalapatis <emil@etsalapatis.com>
>>> wrote:
>>>
>>>> Hi everyone,
>>>>
>>>>     while developing a virtiofs kernel driver I have written a debug
>>>> virtio transport to test virtio drivers inside a VM without requiring
>>>> nested virtualization or support from the host. The transport allows
>>>> paravirt devices to be emulated in local userspace instead of a host, so we
>>>> can create paravirt devices and test them as necessary. For virtiofs in
>>>> particular, it allows us to reuse the existing FUSE tests since we can now
>>>> run both the virtiofs driver and the FUSE server (which is normally in the
>>>> host) in a single machine.
>>>>
>>>> I have uploaded the WIP code [here <https://reviews.freebsd.org/D45370>],
>>>> and an overview of the design [here
>>>> <https://gist.github.com/etsal/4280b6f16c1815d64ffda7ecce0b66f5>]. The
>>>> patch has a ways to go, and currently only supports virtio-blk device
>>>> emulation as a PoC, but feedback is welcome and appreciated. Please also
>>>> let me know if there is interest in using this for testing other virtio
>>>> devices apart from virtiofs.
>>>>
>>>> --Emil
>>>>
>>>
>>
>> --
>> Mario.
>>
>

-- 
Mario.