linux-kernel - Re: [RESEND PATCH] ARM: errata: Workaround for Cortex-A12 erratum 818325

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Message-ID: <56387890.2090802@gmail.com>
Date:	Tue, 3 Nov 2015 17:04:16 +0800
From:	Caesar Wang <caesar.upstream@...il.com>
To:	Arnd Bergmann <arnd@...db.de>, linux-arm-kernel@...ts.infradead.org
Cc:	Huang Tao <huangtao@...k-chips.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Russell King <linux@....linux.org.uk>, hl@...k-chips.com,
	Nadav Haklai <nadavh@...vell.com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>, sjg@...omium.org,
	Stephen Boyd <sboyd@...eaurora.org>,
	linux-kernel@...r.kernel.org, dianders@...omium.org,
	Kever Yang <kever.yang@...k-chips.com>,
	linux-rockchip@...ts.infradead.org, cwz@...k-chips.com,
	Jonathan Stone <j.stone@...sung.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Caesar Wang <wxt@...k-chips.com>,
	Heiko Stuebner <heiko@...ech.de>
Subject: Re: [RESEND PATCH] ARM: errata: Workaround for Cortex-A12 erratum
 818325

在 2015年11月03日 16:45, Arnd Bergmann 写道:
> On Tuesday 03 November 2015 16:10:09 Caesar Wang wrote:
>> +       /* Cortex-A12 Errata */
>> +       ldr     r10, =0x00000c0d                @ Cortex-A12 primary part number
>> +       teq     r0, r10
>> +       bne     5f

beq  __ca15_errata:
>> +#ifdef CONFIG_ARM_ERRATA_818325
>> +       teq     r6, #0x00                       @ present in r0p0
>> +       teqne   r6, #0x01                       @ present in r0p1-00lac0-rc11
>> +       mrceq   p15, 0, r10, c15, c0, 1         @ read diagnostic register
>> +       orreq   r10, r10, #1 << 12              @ set bit #12
>> +       mcreq   p15, 0, r10, c15, c0, 1         @ write diagnostic register
>> +       isb
>> +#endif
>>          /* Cortex-A15 Errata */
>>
> Does this still build? You seem to have lost the '5:' label.

No,  I didn't have build in next kernel.

Yup,  the patch need a bit change from the message.

commit 17e7bf86690eaad4906d2295f0bd171cc194633b
Author: Russell King <rmk+kernel@....linux.org.uk>
Date:   Sat Apr 4 21:34:33 2015 +0100

     ARM: proc-v7: move CPU errata out of line

-----
Original patch:
https://patchwork.kernel.org/patch/4735341/

Applied and verified on kernel V3.14.

>
> 	Arnd
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

-- 
Thanks,
Caesar

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