Supporting new interfaces in phosphor-ipmi-flash

[Andrew Jeffery]

On Wed, 27 Jan 2021, at 20:13, Troy Lee wrote:
> Hi team,
> 
> For security consideration, user might want to disable AST2500/AST2600 
> P2A functionality by default. To compensate the effect to 
> phosphor-ipmi-flash, we're planning to support two alternative in-band 
> firmware upgrade over PCIe for AST2500/AST2600 (AST2520 and AST2620 are 
> excluded):
>  - Through a reserved **VGA** memory on BAR[0], or
>  - Through a reserved **PCIe** shared memory on BAR[1]
> 
> The usage pretty much the same as P2A, but it runs on different BAR, 
> offset and length.
> This will involves modifying phosphor-ipmi-flash/[tools|bmc]. Should I 
> create new **interfaces**, e.g. astpcie/astvga?
> 

This is the HOST2BMC functionality in the 2600 datasheet?

It would be great to have more detail on how it works.

Andrew