[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH 3/5] x86/hvm: Make HVM_PARAM_{STORE, CONSOLE}_EVTCHN read-only to the guest



On Wed, Sep 05, 2018 at 07:12:02PM +0100, Andrew Cooper wrote:
> These values are set by the toolstack for each create/restore operation, and
> bound by xen{store,console}d before the the guest starts running.
> 
> A guest has no reason to modify them at all, and the matching *_PFN parameters
> are already read-only.  Adjust the *_EVTCHN permissions to be consistent.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Oh, that answers one of my questions in the previous patch :)

Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

I wonder however if such parameters being writable was part of the
public ABI, since it's exposed to guests and now we are changing the
behavior.

Thanks, Roger.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.