Hi Dave.

What is the smallest supported page size?


On Wed, Mar 17, 2021 at 10:14 PM Dr. David Alan Gilbert <dgilbert@redhat.com>
wrote:

> Hi Michael,
>   I noticed your AVR code defines:
>
>   #define TARGET_PAGE_BITS 8
>
> and has an explanation of why.
>
> Note however that's not going to work with the current live
> migration/snapshotting code, since you're a couple of bits smaller
> than the smallest page size we had so far, and for many years
> the RAM migration code has stolen the bottom few bits of the address
> as a flag field, and has already used 0x100 up; see migration/ram.c
> RAM_SAVE_FLAG_*    - and it's actually tricky to change it, because if
> you change it then it'll break migration compatibility with existing
> qemu's.
>
> Hmm.
>
> Dave
>
> --
> Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
>
>

-- 
Best Regards,
Michael Rolnik