Re: (v2) Design proposal for RMRR fix

[George Dunlap <george.dunlap@eu.citrix.com>]

On 01/18/2015 08:58 AM, Tian, Kevin wrote:
>> From: George Dunlap
>> Sent: Thursday, January 15, 2015 7:45 PM
>>
>>>
>>> If above high level flow can be agreed, then we can move forward to
>>> discuss next level detail e.g. how to pass the rmrr list cross different
>>> components. :-)
>>
>> I think we're definitely ready to move on.  There are a bunch of tiny
>> details we could discuss, but those are  mostly minor changes that can
>> be tweaked when the patches are submitted.
>>
> 
> Thanks for all the good discussions in the thread, and good we have 
> consensus to move forward now.
> 
> still one open to hear suggestion though, regarding to how we want 
> to pass the reserved regions to domain builder and hvmloader (for Xen 
> we will extend related assignment hypercall to include per device override).
> 
> one simple solution is to extend xc_hvm_build_args and hvm_info_table 
> to include specified regions, with the limitation on defining a fixed 
> number (possibly use E820_MAX as a reasonable assumption)
> 
> another option is to place the information in xenstore which is more
> flexible. However domain builder doesn't use xenstore right now (suppose 
> extending use xenstore is not complex?)

I *think* the last time I asked such a question, the answer was that
allowing the domain builder to access xenstore would introduce a
cyclical dependency.  But I can't remember the details now (and I may h
ave it wrong).

 -George