linux-kernel - Re: [Xen-devel] [PATCH] xen: don't use privcmd_call() from xen_mc

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Date:   Wed, 13 Jun 2018 04:05:32 -0600
From:   "Jan Beulich" <JBeulich@...e.com>
To:     "Juergen Gross" <jgross@...e.com>
Cc:     "xen-devel" <xen-devel@...ts.xenproject.org>,
        "Boris Ostrovsky" <boris.ostrovsky@...cle.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH] xen: don't use privcmd_call() from
 xen_mc_flush()

>>> On 13.06.18 at 11:58, <jgross@...e.com> wrote:
> Using privcmd_call() for a singleton multicall seems to be wrong, as
> privcmd_call() is using stac()/clac() to enable hypervisor access to
> Linux user space.
> 
> Add a new xen_single_call() function to be use for that purpose.
> 
> Reported-by: Jan Beulich <jbeulich@...e.com>
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Jan Beulich <jbeulich@...e.com>