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

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Message-ID: <2a9600b0-3b49-7835-a664-9deb30b100a4@suse.com>
Date:   Tue, 7 Aug 2018 15:11:37 +0200
From:   Juergen Gross <jgross@...e.com>
To:     linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Cc:     boris.ostrovsky@...cle.com
Subject: Re: [PATCH] xen: don't use privcmd_call() from xen_mc_flush()

On 13/06/18 11:58, Juergen Gross 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>

Boris, any objections?


Juergen