Re: [Qemu-devel] [PATCH 2/2] hw/arm/virt: no ITS on older machine types

[Auger Eric]

Hi Peter,

On 20/01/2017 16:52, Peter Maydell wrote:
> On 10 October 2016 at 17:35, Andrew Jones <address@hidden> wrote:
>> We should avoid exposing new hardware (through DT and ACPI) on older
>> machine types. This patch keeps 2.7 and older from changing, despite
>> the introduction of ITS support for 2.8.
>>
>> Signed-off-by: Andrew Jones <address@hidden>
>> ---
>>
>> As Eduardo pointed out long ago for a different reason, we should
>> probably replace VirtGuestInfo with direct use of VirtMachineClass,
>> like x86 has done to replace PcGuestInfo with direct use of
>> PCMachineClass. I'll work on that, but wanted to get this ITS
>> fixup in sooner than later, so I'm posting this patch now, which
>> requires 'no_its' to be duplicated.
> 
> So this patch added a no_its flag which gets set for virt-2.7
> and earlier, but there's no user-facing way to say "I'd like
> a virt-2.8 board with no ITS", right? That's a bit unfortunate
> because the ITS can't be migrated, which means there's no way
> to ask for a post-2.7 virt board which can be migrated...

Sorry for the delay.

For 2.9 machine I can add a new property that would allow the user to
deselect the ITS. Would that make sense?

Thanks

Eric


> thanks
> -- PMM
>