Re: [PATCH 3/3] arm64: dts: Add dts files for Hisilicon Hi6220 SoC

From: Marc Zyngier
Date: Sun Apr 12 2015 - 06:58:17 EST

On 2015-04-12 07:40, Brent Wang wrote:
Hello Mark,

2015-02-06 16:42 GMT+08:00 Brent Wang <wangbintian@xxxxxxxxx>:

+ gic: interrupt-controller@f6800000 {
+ compatible = "arm,gic-400", "arm,cortex-a15-gic";

Surely there's no need for the "arm,cortex-a15-gic" fallback entry? What
am I missing?
Remove it in next version.
After remove "arm,cortex-a15-gic", I get the following error during
kernel booting:
kvm [1]: Using HYP init bounce page @396d9000
kvm [1]: error: no compatible GIC node found
kvm [1]: error initializing Hyp mode: -19

Check code "virt/kvm/arm/vgic.c", gicv2 only "cortex-a15-gic" and
gicv3 support kvm now,
so I think we should keep it, how about your idea?

Please look at commit 0f37247574b3 that is queued for merge in 4.1.
It adds the required compatibility strings to KVM, so Mark is perfectly
right to ask you to drop this "cortex-a15-gic" from your DT.

This DT won't be merged before 4.1 anyway, so there is no point trying
to make it work with older kernels.


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