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

[Jürgen Groß <jgross@xxxxxxxx>]

On 26.08.20 09:50, Simon Leiner wrote:
> 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).
This seems to be an Arm specific function.

virt_addr_valid() seems to be a good fit.


Juergen