linux-kernel - Re: [RFC/GIT PULL] Linux KVM tool for v3.2

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Message-ID: <CA+1xoqfg3sJ7ApWWOuhPCDz+GATY2NMx3r_cKiM9TPpAWYRawQ@mail.gmail.com>
Date:	Thu, 10 Nov 2011 11:49:10 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	Avi Kivity <avi@...hat.com>
Cc:	Markus Armbruster <armbru@...hat.com>,
	Pekka Enberg <penberg@...nel.org>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, Christoph Hellwig <hch@....de>
Subject: Re: [RFC/GIT PULL] Linux KVM tool for v3.2

On Thu, Nov 10, 2011 at 11:43 AM, Avi Kivity <avi@...hat.com> wrote:
> On 11/10/2011 11:34 AM, Sasha Levin wrote:
>> On Thu, Nov 10, 2011 at 11:23 AM, Avi Kivity <avi@...hat.com> wrote:
>> > On 11/10/2011 11:14 AM, Sasha Levin wrote:
>> >> > Trying and failing.  sVirt will deny access to all files except those
>> >> > explicitly allowed by libvirt.
>> >>
>> >> It still allows the guest to read more than enough files which it
>> >> shouldn't be reading.
>> >>
>> >> Unless you configure sVirt on a per-guest basis...
>> >
>> > sVirt is per-guest.
>>
>> It still would mean that the guest can access any file (actually, even
>> device, no?) the hypervisor can access.
>
> It does, but the hypervisor can only access the guest's images, and a
> few internal files (like the qemu-kvm executable and its libraries).

What about devices? You let the guest read and write to devices as
well (/dev/kvm for example, or network devices).
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