[RFC PATCH 1/2] powerpc/xive: guest exploitation of the XIVE interrupt controller

[Cédric Le Goater]

On 07/03/2017 06:19 AM, Benjamin Herrenschmidt wrote:
> On Mon, 2017-07-03 at 13:55 +1000, David Gibson wrote:
>>> Calls that still need to be addressed :
>>>
>>>     H_INT_SET_OS_REPORTING_LINE
>>>     H_INT_GET_OS_REPORTING_LINE
>>>     H_INT_ESB
>>>     H_INT_SYNC
>>
>> So, does this mean there's a PAPR update with the XIVE virtualization
>> stuff?  Or at least an ACR?  Can we have that available please...
> 
> There is, I will try to get it published.

Until then, the QEMU support will have some documentation on the 
hcalls and on the device tree.

I am still struggling with CAS on QEMU. POWER9 supports both the 
legacy XICS model and the newer one, XIVE, and we can switch from 
one another depending on the guest kernel. This is a serious 
headache for the model as the ICS/ICP objects are chosen after 
the guest has booted. 

That will be a topic for some discussion on the qemu-ppc mailing 
list. Hopefully soon. 

C.