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From:   Alexey Brodkin <alexey.brodkin@synopsys.com>
To:     Vineet Gupta <vineet.gupta1@synopsys.com>,
        "clabbe@baylibre.com" <clabbe@baylibre.com>
CC:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "alexey.brodkin@synopsys.com" <alexey.brodkin@synopsys.com>,
        "khilman@baylibre.com" <khilman@baylibre.com>,
        "linux-snps-arc@lists.infradead.org" 
        <linux-snps-arc@lists.infradead.org>,
        Eugeniy Paltsev <eugeniy.paltsev@synopsys.com>
Subject: RE: [PATCH 2/2] arc: hsdk_defconfig: enable CONFIG_ARC_UBOOT_SUPPORT
Thread-Topic: [PATCH 2/2] arc: hsdk_defconfig: enable
 CONFIG_ARC_UBOOT_SUPPORT
Thread-Index: AQHUvS1YbZ9yghuWeU6v3UgGuJhQVqXRaxBw
Date:   Tue, 5 Feb 2019 16:51:20 +0000
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Hi Vineet, Corentin,

> -----Original Message-----
> From: Vineet Gupta <vgupta@synopsys.com>
> Sent: Tuesday, February 5, 2019 7:42 PM
> To: Eugeniy Paltsev <paltsev@synopsys.com>; clabbe@baylibre.com
> Cc: linux-kernel@vger.kernel.org; alexey.brodkin@synopsys.com; khilman@ba=
ylibre.com; linux-snps-
> arc@lists.infradead.org
> Subject: Re: [PATCH 2/2] arc: hsdk_defconfig: enable CONFIG_ARC_UBOOT_SUP=
PORT
>=20
> On 2/5/19 3:42 AM, Eugeniy Paltsev wrote:
> > Hi Corentin,
> >
> > In case of devboards (like HSDK) we really often disable bootloader and=
 load
> > Linux image in memory via JTAG. Enabling CONFIG_ARC_UBOOT_SUPPORT by
> > default will break it as we will try to interpret some junk in a regist=
ers
> > as a pointers to bootargs/etc which aren't set by anyone in case of JTA=
G using.
> >
> > So it isn't a good idea to have CONFIG_ARC_UBOOT_SUPPORT enabled by def=
ault.
>=20
> Right.
>=20
> It is difficult to accommodate everyone's needs (often conflicting) in a =
single
> defconfig.
> Can you folks create an out-of-tree defconfig or some such.

I do think there's a proper solution which [hopefully] makes both parties h=
appy.
Eugeniy is about to send-out a patch which allows us to not care about
garbage in R0/R2 when running after U-Boot.

-Alexey