Oleksandr Tyshchenko writes ("[PATCH V6 1/2] xen/arm: Introduce gpaddr_bits
field to struct xen_domctl_getdomaininfo"):
> From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
>
> We need to pass info about maximum supported guest physical
> address space size to the toolstack on Arm in order to properly
> calculate the base and size of the extended region (safe range)
> for the guest. The extended region is unused address space which
> could be safely used by domain for foreign/grant mappings on Arm.
> The extended region itself will be handled by the subsequent
> patch.
You say "to the toolstack", but you are exposing this information up
to callers of libxl. Do you mean some higher-layer toolstack that
uses libxl ? What does it use this information for ?
FTAOD I am not opposed to exposing this in this way; indeed it seems
likely to be useful. I just want to fully understand before I give
this my tools ack.
> + info->gpaddr_bits = domctl.u.getdomaininfo.gpaddr_bits;
I'm pleased to find that this is not arch-specific.
Thanks,
Ian.
