Re: [Android-virt] [PATCH v3 1/8] ARM: KVM: Initial skeleton to compile KVM support

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On 05.06.2011, at 18:28, Avi Kivity wrote:

> On 06/05/2011 07:25 PM, Christoffer Dall wrote:
>>>> 
>>>> An additional advantage is that this is a vm ioctl, not a vcpu ioctl, so
>>>> no need to interrupt the vcpu thread in userspace in order to queue an
>>>> interrupt.  Of course, it still happens in the kernel, but it's easier
>>>> for userspace to implement its device model this way.
>>> 
>>> So supporting this over existing archs would have some benefits as well,
>>> though a bit smaller if in-kernel irqchip is already implemented.
>>> 
>> 
>> Could you elaborate what you mean here? I'm not really following. Are
>> you suggesting a new arch-generic interface? (Pardon my ignorance).
> 
> Using KVM_IRQ_LINE everywhere except s390, not just in x86 and ARM.

An in-kernel MPIC implementation is coming for PPC, so I don't see any reason to switch from something that works now.


Alex

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