Re: [Stratos-dev] Extending virtio-rpmb to pass through eMMC probe commands

Alex Bennée via Stratos-dev stratos-dev@op-lists.linaro.org writes:

Hi Ulf,

Ilias told me you were the eMMC guru so your might be best placed to advise on this problem.

Ping?

<snip>

However I'm wary of adding an open ended pass-through definition, especially anything that might tempt an implementer to start trying to read and write data using eMMC commands instead of the proper virtio commands.

• What eMMC commands are needed for a probe?
• What are the bounds of frame sizes for those commands?
  • I'm currently overloading the wasted stuff[196] bytes to the encapsulation and it would get complicated if we extended into the used fields.
• Should we mandate certain responses?
  • e.g. 0 "normal" size, eMMC version 4.1 etc

Thanks,

-- Alex Bennée