Re: An issue with x86 tcg and MMIO

[Richard Henderson]

On 2/1/23 23:39, Jonathan Cameron wrote:
> Not sure - if we can do the handling above then sure we could make that change.
> I can see there is a path to register the callbacks but I'd kind of assumed
> ROM meant read only...

I think "romd" means "read mostly".

In the case of flash, I believe that a write changes modes (block erase something 
something) and the region changes state into MMIO.  But normal state is read mode where 
read+execute go through unchallenged.

It has been a long time since I studied how all that works, so I may well have forgotten 
something.


r~