Re: [Xen-devel] [PATCH v3 1/1] xen: move TLB-flush filtering out into populate_physmap during vm creation

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 09.09.16 at 11:34, <andrew.cooper3@xxxxxxxxxx> wrote:
> On 09/09/16 08:56, Jan Beulich wrote:
>>>>> On 09.09.16 at 07:37, <dongli.zhang@xxxxxxxxxx> wrote:
>>>>> Did you go through and check that there is nothing this information
>>>>> can already get derived from? I can't immediately point you at
>>>>> anything, but it feels like there should. 
>>>>>
>>>> Indeed. And if there isn't and we need to do add our own flagging,
>>>> isn't there a better way and place where to put it (e.g., what Juergen
>>>> and Andrew are hinting at)?
>>> I prefer that to derive whether guest boot finishes is neither limited to a
>>> specific domain type (pv, hvm, pvhvm or pvh) nor a specific arch (i386, 
>>> x86_64,
>>> arm32, arm64 or more in the future). Ideally, I would have one or a combo of
>>> fields belong to "struct domain" but there isn't.
>> Of course.
>>
>>> Can we use the field in vcpu[0]?
>> I don't think so: What if another vCPU was scheduled to run first?
> 
> Use the XEN_DOMCTL_unpausedomain hypercall.  It must be called by
> toolstacks on all architectures to complete domain construction.

I think we had settled on this one already. The question now being
discussed is whether a new field in the domain structure is needed,
or whether the information he's after can be derived from already
existing fields.

Jan


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