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Re: [Embedded-pv-devel] [Xen-devel] Access I2C bus from guest/DomU on ARM board

On Wed, Jan 17, 2018 at 9:06 PM, Andrii Anisov <andrii_anisov@xxxxxxxx> wrote:

Rajesh,

On 17.01.18 16:03, Saumya Rajesh wrote:

Just out of curiosity, is it possible to split the Driver for the Renesas RCar I2C unit [1] into frontend and backend to use the i2c bus from guest? Or to do something similar to PCI passthrough? Please forgive me if I sound illogical. I'm just curious.

I guess you could implement PV I2C using FE/BE scheme. With enormous efforts and unpredictable results.
But I'm sure it is not what you really need.

--

*Andrii Anisov*

Hi Andrii

Actually I am planning to set up Android as guest in Xen. In order to enable sound in the Android guest, I need to passthrough the audio codec device which communicates through the I2C bus. For BE/FE scheme, I think sharing the internal DMA and clock would pose problems. So I'm going to go ahead with the device passthrough way.

Any thoughts or inputs you can possibly give regarding this use case will be very helpful and valuable.

Regards

Saumya

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