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Re: [Xen-devel] Hypercalls from user-space

  • To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxx>
  • Date: Wed, 06 Oct 2010 07:46:40 +0100
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, "Srujan D. Kotikela" <ksrujandas@xxxxxxxxx>
  • Delivery-date: Tue, 05 Oct 2010 23:47:38 -0700
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  • Thread-topic: [Xen-devel] Hypercalls from user-space
On 05/10/2010 23:37, "Jeremy Fitzhardinge" <jeremy@xxxxxxxx> wrote:

>  On 10/05/2010 03:09 PM, Keir Fraser wrote:
>> /proc/xen/privcmd should be available in domU as well. You might need to
>> enable some dom0 build config options to get it though.
> 
> xenfs doesn't init privcmd on non-privileged kernels.

It ought to. Files like xsd_{kva,port} don't make sense for a domU, but
privcmd at least does as there's no reason a suitably privileged domU
userspace shouldn't be able to make hypercalls at the privilege level of the
domU.

 -- Keir




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