[Skiboot] [PATCH] Document changes to how firmware versions are passed to host on P9

[Vasant Hegde]

On 07/19/2016 12:58 PM, Stewart Smith wrote:
> We won't do mi-version/ml-version, but we will always have version.

Stewart,

Sorry for late response.

>
> Signed-off-by: Stewart Smith <stewart at linux.vnet.ibm.com>
> ---
>   doc/device-tree/ibm,opal/firmware.txt | 4 +++-
>   doc/opal-api/power9-changes.txt       | 1 +
>   2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/doc/device-tree/ibm,opal/firmware.txt b/doc/device-tree/ibm,opal/firmware.txt
> index eab497058be4..3376fba86f37 100644
> --- a/doc/device-tree/ibm,opal/firmware.txt
> +++ b/doc/device-tree/ibm,opal/firmware.txt
> @@ -18,11 +18,13 @@ firmware {
>   'symbol-map' property describes OPAL symbol start address and size.
>
>   'version' property describes OPAL version. Replaces 'git-id', so may
> -not be present.
> +not be present. On POWER9 and above, it is always present.
>
>   'mi-version' property describes Microcode Image. Only on IBM FSP systems.
> +Will (likely) not be present on POWER9 systems.
>
>   'ml-version' property describes Microcode Level. Only on IBM FSP systems.
> +Will (likely) not be present on POWER9 systems.

I failed to understand why it will not be present on FSP based P9 system? Any 
reason?

update_flash (user space tool) makes use of these properties.

-Vasant