linux-kernel - Re: [PATCH 0/7] Add SMP bringup support for mt65xx socs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CABuKBeLT8-sjPY6ZQXacMZZ_3iKX-g82AB0gPhsi7VW=WdjTTw@mail.gmail.com>
Date:	Wed, 6 May 2015 10:29:25 +0200
From:	Matthias Brugger <matthias.bgg@...il.com>
To:	Yingjoe Chen <yingjoe.chen@...iatek.com>
Cc:	Mark Rutland <mark.rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Marc Carino <marc.ceeeee@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	linux-mediatek@...ts.infradead.org,
	Sascha Hauer <kernel@...gutronix.de>,
	Olof Johansson <olof@...om.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	srv_heupstream <srv_heupstream@...iatek.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Jason Cooper <jason@...edaemon.net>
Subject: Re: [PATCH 0/7] Add SMP bringup support for mt65xx socs

2015-05-06 9:59 GMT+02:00 Yingjoe Chen <yingjoe.chen@...iatek.com>:
> On Wed, 2015-05-06 at 15:19 +0800, Yingjoe Chen wrote:
>> Hi Matthias,
> <...>
>> > I tried on the mt8135 eval board but it fails to bring up the CPU.
>> >
>> > When booting:
>> > [    1.048588] CPU1: failed to come online
>> > [    2.049914] CPU2: failed to come online
>> > [    3.051245] CPU3: failed to come online
>>
>>
>> Thanks for testing, and the config file you provided.
>> It seems you are running THUMB2 kernel, unfortunately mt8135 trustzone
>> firmware doesn't support jump to THUMB2 code directly.
>>
>> I can workaround this with the following patch. I'll include it in my
>> next round.
>>
>> Joe.C
>>
>> -----8<----------------
>> diff --git a/arch/arm/mach-mediatek/platsmp.c
>> b/arch/arm/mach-mediatek/platsmp.c
>> index e266b3d..5dea55a 100644
>> --- a/arch/arm/mach-mediatek/platsmp.c
>> +++ b/arch/arm/mach-mediatek/platsmp.c
>> @@ -57,6 +57,18 @@ static const struct of_device_id mtk_smp_boot_infos[]
>> __initconst = {
>>  static void __iomem *mtk_smp_base;
>>  static const struct mtk_smp_boot_info *mtk_smp_info;
>>
>> +#ifdef CONFIG_THUMB2_KERNEL
>> +__asm__(
>> +     ".arm\n"
>> +     "mtk_secondary_startup_fixup:\n"
>> +     "       b secondary_startup\n"
>> +     ".thumb\n"
>> +);
>> +
>> +void mtk_secondary_startup_fixup(void);
>> +#define secondary_startup mtk_secondary_startup_fixup
>> +#endif
>
>
> Replying myself.
>
> It seems kernel already have secondary_startup_arm which support this
> usage. I'll use that in my next version instead.

With this I was able to get the board up and running. I will try mt6589 ASAP.

-- 
motzblog.wordpress.com
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/