Re: [Xen-ia64-devel] [PATCH]: allow hypercalls only from kernels.

[Tristan Gingold <Tristan.Gingold@xxxxxxxx>]

Le Mardi 21 Mars 2006 03:07, Tian, Kevin a écrit :
> From: Tristan Gingold
>
> >Sent: 2006年3月20日 21:28
> >To: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx; Magenheimer, Dan (HP Labs
> >Fort Collins); Alex Williamson
> >Subject: [Xen-ia64-devel] [PATCH]: allow hypercalls only from kernels.
> >
> >Hi,
> >
> >this patch complete the previous one.
> >Hypercalls are only allowed from kernels.
> >I have added an 'unsafe_hypercall' boolean command line option to
> >enable the
> >two debugging hypercalls.  This option is disabled by default, as it may
> >be
> >used to write in the kernel area.
> >
> >Tested by boot+shutdown of dom0+domU (option off).
> >Tested by boot of dom0 + postat (option on).
> >
> >Tristan.
>
> Hi, Tristan,
>       Good work, and I guess you may want to add an incremental patch
> upon this one. As your concern in the comment, simply return a failure to
> guest doesn't conform to generality well. It's possible that hardcode
> hypercall iim conflicts with guest meaningful iim. Even not, it's better to
> let guest kernel handle the case, like to kill that problematic process.
> Application should observe same behavior exactly like on real system where
> it breaks a kernel-unsupported iim. So a break fault needs to be fired back
> to guest.
Yes, I have to do this.

Tristan.



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