From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH v4 2/2] allow hardware domain != dom0
Date: Tue, 15 Apr 2014 15:45:59 +0100
Message-ID: <534D4627.4050408@citrix.com>
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To: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Cc: Keir Fraser <keir@xen.org>, Ian Campbell <ian.campbell@citrix.com>, Tim Deegan <tim@xen.org>, Ian Jackson <ian.jackson@eu.citrix.com>, xen-devel@lists.xen.org, Jan Beulich <jbeulich@suse.com>
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On 14/04/14 22:23, Daniel De Graaf wrote:
> diff --git a/xen/common/domain.c b/xen/common/domain.c
> index 3c05711..11c905a 100644
> --- a/xen/common/domain.c
> +++ b/xen/common/domain.c
> @@ -61,6 +61,11 @@ struct domain *domain_list;
>  
>  struct domain *hardware_domain __read_mostly;
>  
> +#ifdef CONFIG_LATE_HWDOM
> +domid_t hardware_domid __read_mostly;
> +integer_param("hardware_dom", hardware_domid);
> +#endif
> +

Is it worth putting a custom_param() in here which clamps hardware_domid
below FIRST_RESERVED_DOMID, or allow anyone specifying
hardware_dom=0xffff to keep all the broken pieces they find?  Aliasing
the magic domids is sure to break things.

~Andrew