From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: Hypercalls from user-space
Date: Fri, 24 Sep 2010 12:14:58 -0700
Message-ID: <4C9CF8B2.1010103@goop.org>
References: <AANLkTimQwuof3KVbo6QuJwYNCD=Yom1pmFnjj4+HfWe0@mail.gmail.com>
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To: "Srujan D. Kotikela" <ksrujandas@gmail.com>
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 On 09/24/2010 11:38 AM, Srujan D. Kotikela wrote:
> Hi,
>
> Can anyone tell me how to invoke hypercalls from user space? Or any
> pointers for the same.
>
> It's urgent, please help.
>

You can't directly invoke hypercalls from userspace.   In a privileged
domain you can use ioctls on /proc/xen/privcmd.

    J