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From: John Baldwin <jhb@freebsd.org>
To: Roger Pau Monne <roger.pau@citrix.com>
Subject: Re: [PATCH v7 02/19] xen: add macro to detect if running as Dom0
Date: Tue, 24 Dec 2013 09:56:06 -0500
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Cc: xen-devel@lists.xen.org, julien.grall@citrix.com, freebsd-xen@freebsd.org,
 freebsd-current@freebsd.org, kib@freebsd.org, gibbs@freebsd.org
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On Thursday, December 19, 2013 1:54:39 pm Roger Pau Monne wrote:
> ---
>  sys/xen/xen-os.h |    7 +++++++
>  1 files changed, 7 insertions(+), 0 deletions(-)
> 
> diff --git a/sys/xen/xen-os.h b/sys/xen/xen-os.h
> index c7474d8..e8a5a99 100644
> --- a/sys/xen/xen-os.h
> +++ b/sys/xen/xen-os.h
> @@ -82,6 +82,13 @@ xen_hvm_domain(void)
>  	return (xen_domain_type == XEN_HVM_DOMAIN);
>  }
>  
> +static inline int
> +xen_initial_domain(void)
> +{
> +	return (xen_domain() && HYPERVISOR_start_info &&
> +	        HYPERVISOR_start_info->flags & SIF_INITDOMAIN);
> +}
> +
>  #ifndef xen_mb
>  #define xen_mb() mb()
>  #endif

This looks fine to me.

-- 
John Baldwin