Re: [Xen-devel] Why does xc_map_foreign_range() refuse to map pfns below 1M from a domU

[Razvan Cojocaru <rzvncj@xxxxxxxxx>]

> OK, so XSM is involved but you are 101% certain that it is not
> preventing the mappings?

Yes, I really am :)

> AFAIK the foreign mapping privilege should already allow this. You have
> just uncovered a bug somewhere. I'm afraid I don't know where, it might
> be in your code, in libxc, in the privcmd ioctl driver or in the
> hypervisor.
>
> You probably need to instrument things up down the call stack to find
> out where these attempts are getting rejected.

Right. Thanks!

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