> >> +#define PHYS_RAM_MAX_SIZE (2047 * 1024 * 1024 * 1024ULL)
> >
> > This seems fairly arbitrary. Why? Any limit is certainly target specific.
>
> On a 32-bit host, a 2GB limit is pretty reasonable since you're limited
> in virtual address space.  On a 64-bit host, there isn't this
> fundamental limit.  If a target may have it's own limit but there is
> definitely a host imposed limit.
>
> 2047GBs is a somewhat arbitrary limit though for 64-bit hosts.  If you
> have a more logical suggestion, I'll happily change it.

Don't have a limit at all.

The reason we have the current 31-bit limit is because qemu is/was known to 
use a signed int do hold the size. With your code 64-bit hosts should be able 
to handle anything atoi can parse.

As mentioned on IRC, I also noticed that ram_save hasn't been updated.

Paul

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