RE: [PATCH v2 1/3] KVM: arm: Fix NULL pointer dereference if KVM is used without in-kernel irqchip

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 Hello!

> I'd appreciate a better commit log. Which patch broke it, why is that
> necessary.

 It was broken by 662d9715840aef44dcb573b0f9fab9e8319c868a.
 Actually, runtime detection was never implemented. The patch message just says that it can be done.
And in order to run KVM on my lame board i had to disable VGIC and VTIMER in kernel .config. The
actual breakage happened because without these definitions kvm_vgic_map_resources() was just a
do-nothing inline.

 vGIC can perfectly be emulated by userspace. And even generic timer can, with some tricks. So i
decided to restore this functionality.

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


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