On 2011-12-04 14:49, Avi Kivity wrote:
> On 12/04/2011 03:42 PM, Jan Kiszka wrote:
>> On 2011-12-04 14:31, Avi Kivity wrote:
>>> On 12/03/2011 01:17 PM, Jan Kiszka wrote:
>>>> From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
>>>>
>>>> Introduce the alternative 'kvm-i8259' device model that exploits KVM
>>>> in-kernel acceleration.
>>>>
>>>> The PIIX3 initialization code is furthermore extended by KVM specific
>>>> IRQ route setup. Moreover, GSI injection differs in KVM mode from the
>>>> user space model. As we can dispatch ISA-range IRQs to both IOAPIC and
>>>> PIC inside the kernel, we do not need to inject them separately. This is
>>>> reflected by a KVM-specific GSI handler.
>>>>
>>>> +
>>>> +qemu_irq *kvm_i8259_init(void)
>>>> +{
>>>> + ISADevice *dev;
>>>> +
>>>> + dev = isa_create("kvm-i8259");
>>>>
>>>
>>> Same issue. Is this a different device, or an different implementation
>>> of the same device?
>>
>> They are theoretically the same from guest perspective (therefore you
>> can migrate between machines that differ in this).
>
> But the name becomes part of the save/restore ABI, so you can't.
Nope, the vmstate names are identical. That would ruin migration
otherwise. It's just the output of info qtree & co. that changes.
Jan
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