Re: Add 'info pg' command to monitor

[Peter Maydell <peter.maydell@linaro.org>]

On Tue, 16 Apr 2024 at 17:53, Don Porter <porter@cs.unc.edu> wrote:
> There is still a lot I am learning about the code base, but it seems
> that qemu_get_guest_memory_mapping() does most of what one would need.
> It currently only returns the "leaves" of the page table tree in a list.
>
> What if I extend this function with an optional argument to either
> 1) return the interior nodes of the page table in additional lists (and
> then parse+print in the monitor code), or
> 2) inline the monitor printing in the arch-specific hook, and pass a
> flag to get_guest_memory_mapping() that turns on/off the statements that
> pretty print the page tables?
>
> It looks like most CPUs implement this function as part of checkpointing.

As far as I can see only x86 implements the get_memory_mapping
function, so once again somebody has added some bit of
functionality that does a walk of the page tables that is
x86 only and that shares no code with any of the other
page table walking code :-(

thanks
-- PMM