Re: [Xen-devel] [PATCH] arch/x86/hvm: Bind xen-created event channels to building domain

[Keir Fraser <keir@xxxxxxx>]

On 09/01/2013 14:43, "Daniel De Graaf" <dgdegra@xxxxxxxxxxxxx> wrote:

>> OOI what is the builder (I assume it's not specific to being a separate
>> domain) doing that requires it to access to the IOEMU event channels?
>> 
>> Ian.
>> 
> 
> I believe this caused problems when the device model was running in the
> same domain as the domain builder (where that was not dom0), not during
> the domain build process.  After seeing Keir and Jan's comments, I think
> the best solution is for the domain builder to set HVM_PARAM_DM_DOMAIN
> to DOMID_SELF (or the actual device model domain ID) earlier in the
> build process and use that parameter in the event channel creation
> instead of 0 or current->domain->domain_id.

This is the fix I have just applied as xen-unstable:26339. See what you
think. It will require you to set HVM_PARAM_DM_DOMAIN from the toolstack at
some point during domain creation, any time before the device model starts
running.

 -- Keir



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