linux-kernel - Re: [xtensa] arch/xtensa/include/asm/processor.h:14:26: fatal error: variant/core.h: No such file or directory

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Date:	Mon, 14 Mar 2016 06:35:33 +0300
From:	Max Filippov <jcmvbkbc@...il.com>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	Chris Zankel <chris@...kel.net>, lkp@...el.com,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>
Subject: Re: [xtensa] arch/xtensa/include/asm/processor.h:14:26: fatal error:
 variant/core.h: No such file or directory

Hello,

On Mon, Mar 14, 2016 at 5:18 AM, Fengguang Wu <fengguang.wu@...el.com> wrote:
> FYI, xtensa has an error that happen in the below 2 configs:
>
>         xtensa-audio_kc705_defconfig (attached as .config)
>         xtensa-smp_lx200_defconfig
>
> It's too old to be bisect friendly. It'd be great if can be fixed.

I will post patches that add these core variants to xtensa arch.
There's still an issue though: they wouldn't build with the default xtensa
toolchain, because both these configurations have HiFi coprocessor and
there's assembly code in variant-specific files that saves and restores
coprocessor registers. Currently every xtensa core variant requires a
toolchain specifically built for it with corresponding configuration overlay:

  http://wiki.linux-xtensa.org/index.php/Toolchain_Overlay_File

-- 
Thanks.
-- Max