Xen 4.18 pvshim console issue (with patch)

[Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>]

Hello,
With Xen 4.18, a PV domain running under pvshim doesn't get console input.
This is because the domain id in pvshim isn't 0 (and on x86 max_init_domid is
hardwired to 0), so console_input_domain() will never select that domain
as input.

The attached patch fixes it by translating 0 to the real domain id for
pvshim, but there may be a better way to do this.

-- 
Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>
     NetBSD: 26 ans d'experience feront toujours la difference
--

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