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

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Message-ID: <CAAS=xmgySDmwNpx5xpHd15M-1eJLvPBhudhGu+cRqw3g_X_SZA@mail.gmail.com>
Date:	Sun, 12 Apr 2015 14:40:46 +0800
From:	Brent Wang <wangbintian@...il.com>
To:	Mark Rutland <mark.rutland@....com>,
	Marc Zyngier <marc.zyngier@....com>
Cc:	Bintian Wang <bintian.wang@...wei.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
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Subject: Re: [PATCH 3/3] arm64: dts: Add dts files for Hisilicon Hi6220 SoC

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?

Thanks,

Bintian

>>
>>> +             reg = <0x0 0xf6801000 0x0 0x1000>, /* GICD */
>>
>> This doesn't match the unit-address.
> Do you mean change to "<0x0 0xf6801000 0 0x1000>" ?
>
>>
>>> +                   <0x0 0xf6802000 0x0 0x2000>, /* GICC */
>>> +                   <0x0 0xf6804000 0x0 0x2000>, /* GICH */
>>> +                   <0x0 0xf6806000 0x0 0x2000>; /* GICV */
>>
>> I guess no-one's bothered to consider 64k pages?
>>
>> Given GICH and GICV, I hope that this platform is booted at EL2?
> Transfer from EL3 to EL1 directly, keep these two just for future use.
>
>>
>>> +             #interrupt-cells = <3>;
>>> +             #address-cells = <0>;
>>> +             interrupt-controller;
>>> +     };
>>> +
>>> +
[...]
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