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

Caesar Wang
2015-11-03T09:04:51Z

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@arm.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
>
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--
Thanks,
Caesar