Re: [Xen-devel] [PATCH] x86: Skip check apic_id_limit for Xen

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 18/08/2017 18:38, Eduardo Habkost wrote:
>>> I think you still need to do a check for vIOMMU being enabled.
>>
>> Yes, this will be done in the Xen tool stack and Qemu doesn't have such
>> knowledge. Operations of create, destroy Xen vIOMMU will be done in the
>> Xen tool stack.
>
> Shouldn't we make QEMU have knowledge of the vIOMMU device, then?
> Won't QEMU need to know about it eventually?

No, it actually makes sense since Xen hosts all system-wide interrupt
sources outside QEMU, unlike KVM which only hosts the (per-CPU) local APIC.

Paolo

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