Re: [PATCH 2/2] arm/xen: Add misuse warning to virt_to_gfn

[Simon Leiner <simon@xxxxxxxxx>]

On 26.08.20 08:20, Jan Beulich wrote:
> Hmm, to me __phys_to_virt() and __virt_to_phys_nodebug() give
> the impression that they're just linear transformations of the
> address, which would seem to suggest there's a pre-determined
> address range used for the direct map.

>From eyeballing the kernel code, it seems like __is_lm_address() is
suitable for such a check, especially since it is also used in
__virt_to_phys() (the one in arch/arm64/mm/physaddr.c).

Greetings,
Simon