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Re: [Qemu-devel] [PATCH RFC V5 6/9] hw/intc: arm_gicv3_spi_its


From: Pavel Fedin
Subject: Re: [Qemu-devel] [PATCH RFC V5 6/9] hw/intc: arm_gicv3_spi_its
Date: Wed, 21 Oct 2015 17:54:29 +0300

 Hello!

> For QEMU we could in theory do either; I was leaning towards
> direct connection just because on the KVM side the in-kernel
> GIC isn't going to separate them out as two distinct things.

 I'd say this is not entirely true. With KVM you still can have vGIC without 
vITS. Just don't set KVM_VGIC_V3_ADDR_TYPE_ITS and that's it. The only thing 
linked in is LPI support. With KVM you cannot have LPIs without vITS. Neither 
you can directly inject LPIs.
 So, in-kernel ITS is also optional.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia





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