On Sat, 24 Dec 2016, Marek Marczykowski-Górecki wrote:

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> On Sat, Dec 24, 2016 at 12:12:10AM +0200, Ilpo Järvinen wrote:
> > On Fri, 23 Dec 2016, Marek Marczykowski-Górecki wrote:
> > 
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> > > On Fri, Dec 23, 2016 at 12:21:54AM +0200, Ilpo Järvinen wrote:
> > 
> > With "limited multi-user support" I meant something along these lines:
> > A special "launchvm" that is the only thing that an ordinary (non-dom0) 
> > user gets when logging in. 
> 
> So, user interact only with "launchvm", right? How you envision to
> achieve this? In GUI domain concept it is achieved by attaching
> input/output devices to GUI domain instead of dom0.

I/O would be done "like now". The user interacts through the X server in 
dom0 but the user input on that X server should be limited to mainly 
managing focus and screenlocking. In my threat model, the users are not 
exactly a threat other than accidentially messing something if the
system is not enough locked down for them.

The key difference between "launchvm" and mgmt+GUI VM is just where
the X servers run. Cross-user separation aspects are the same
regardless where GUI is done as the GPU PCI device cannot be
shared between many VMs anyway (except perhaps with XenGT one day)
so X servers for all users in multi-user case need to run in the
same VM. Obviously dom0 itself is better isolated in the GUI domain
case so less tricks may be needed but I don't think GUI domain itself
is a magic bullet that solves all multi-user related problems.

> > > And one more thing: please sign your code. Details:
> > > https://www.qubes-os.org/doc/code-signing/
> > 
> > Ok, I'll try (no prior experience gpg usage with email).
> 
> If you like, you can also push git repository somewhere (github or
> else), with signed commits and/or signed tag at the top.

Ok, I will probably then end up using http git repo as I don't want
to create yet-another-account github would require (at least for now).

Anyway, it will take week or slightly more before I can test the
next version as I intentionally left myself without access to my
qubes laptop for a while :-D.


-- 
 i.

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