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

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Date:	Sun, 12 Apr 2015 21:07:43 +0800
From:	Brent Wang <wangbintian@...il.com>
To:	Marc Zyngier <marc.zyngier@....com>
Cc:	Mark Rutland <mark.rutland@....com>,
	"dan.zhao@...ilicon.com" <dan.zhao@...ilicon.com>,
	"btw@...l.itp.ac.cn" <btw@...l.itp.ac.cn>,
	Catalin Marinas <catalin.marinas@....com>,
	"wangbinghui@...ilicon.com" <wangbinghui@...ilicon.com>,
	Will Deacon <will.deacon@....com>,
	"huxinwei@...wei.com" <huxinwei@...wei.com>,
	Kevin Hilman <khilman@...aro.org>,
	Haojian Zhuang <haojian.zhuang@...aro.org>,
	Haifeng Yan <yanhaifeng@...il.com>,
	Rob Herring <rob.herring@...aro.org>,
	Mike Turquette <mturquette@...aro.org>,
	"victor.lixin@...ilicon.com" <victor.lixin@...ilicon.com>,
	Xu Wei <xuwei5@...ilicon.com>,
	Jaehoon Chung <jh80.chung@...sung.com>,
	"sledge.yanwei@...wei.com" <sledge.yanwei@...wei.com>,
	XinWei Kong <kong.kongxinwei@...ilicon.com>,
	"heyunlei@...wei.com" <heyunlei@...wei.com>,
	"w.f@...wei.com" <w.f@...wei.com>,
	Zhangfei Gao <zhangfei.gao@...aro.org>,
	"z.liuxinliang@...wei.com" <z.liuxinliang@...wei.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Bintian Wang <bintian.wang@...wei.com>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"puck.chen@...ilicon.com" <puck.chen@...ilicon.com>,
	Olof Johansson <olof@...om.net>,
	Rob Herring <robh+dt@...nel.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	"zhenwei.wang@...ilicon.com" <zhenwei.wang@...ilicon.com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Guodong Xu <guodong.xu@...aro.org>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Kumar Gala <galak@...eaurora.org>,
	"xuejiancheng@...wei.com" <xuejiancheng@...wei.com>,
	"xuyiping@...ilicon.com" <xuyiping@...ilicon.com>,
	"Liguozhu (Kenneth)" <liguozhu@...ilicon.com>
Subject: Re: [PATCH 3/3] arm64: dts: Add dts files for Hisilicon Hi6220 SoC

Hello Marc,

2015-04-12 18:57 GMT+08:00 Marc Zyngier <marc.zyngier@....com>:
> On 2015-04-12 07:40, Brent Wang wrote:
>>
>> Hello Mark,
>>
>> 2015-02-06 16:42 GMT+08:00 Brent Wang <wangbintian@...il.com>:
>> [...]
>>>>
>>>>
>>>>> +     gic: interrupt-controller@...00000 {
>>>>> +             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.

Thanks for the information.

> This DT won't be merged before 4.1 anyway, so there is no point trying
> to make it work with older kernels.
>
> Thanks,
>
>         M.
> --
> Fast, cheap, reliable. Pick two.



-- 
Best Regards,

Bintian
===========================
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