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Re: [Qemu-devel] [Qemu-trivial] [PATCH 2/2] KVM: PPC: Add dummy kvm_arch

From: Alexey Kardashevskiy
Subject: Re: [Qemu-devel] [Qemu-trivial] [PATCH 2/2] KVM: PPC: Add dummy kvm_arch_init_irq_routing()
Date: Sat, 08 Jun 2013 18:33:20 +1000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6

On 06/08/2013 05:24 PM, Michael Tokarev wrote:
> 06.06.2013 07:59, Alexey Kardashevskiy wrote:
>> From: Scott Wood <address@hidden>
>> The common KVM code insists on calling kvm_arch_init_irq_routing()
>> as soon as it sees kernel header support for it (regardless of whether
>> QEMU supports it).  Provide a dummy function to satisfy this.
>> Unlike x86, PPC does not have one default irqchip, so there's no common
>> code that we'd stick here.  Even if you ignore the routes themselves,
>> which even on x86 are not set up in this function, the initial XICS
>> kernel implementation will not support IRQ routing, so it's best to
>> leave even the general feature flags up to the specific irqchip code.
> As Scott Wood already pointed out, this should come in before the
> actual header update, which is no problem.  We'll have to deal
> with a new warning (-Wmissing-prototypes) which can be dealt with
> by wrapping this function into #ifdef KVM_CAP_IRQ_ROUTING .. #endif
> (I can add this).

Ah. I'll repost it early next week.

> But how about other architectures?  Before, this function were only
> defined for x86, now it is defined for two arches - x86 and ppc.
> Aren't other arches need this as well?

Good point, will check (and fix if needed). Thanks!


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