linux-kernel - Re: [PATCH 0/2] ARM: decompressor: support AUTO

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Date: Sat, 20 Jan 2024 12:19:33 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: Russell King <linux@...linux.org.uk>, Arnd Bergmann <arnd@...db.de>, 
	Andrew Morton <akpm@...ux-foundation.org>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, Jonathan Corbet <corbet@....net>, 
	Thomas Gleixner <tglx@...utronix.de>, Randy Dunlap <rdunlap@...radead.org>, 
	"Mike Rapoport (IBM)" <rppt@...nel.org>, Eric DeVolder <eric.devolder@...cle.com>, 
	Nathan Chancellor <nathan@...nel.org>, "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>, 
	Kees Cook <keescook@...omium.org>, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konrad.dybcio@...ainline.org>, Linus Walleij <linus.walleij@...aro.org>, 
	John Crispin <john@...ozen.org>
Subject: Re: [PATCH 0/2] ARM: decompressor: support AUTO_ZRELADDR and appended DTB

Hi Christian,

On Fri, Jan 19, 2024 at 9:14 PM Christian Marangi <ansuelsmth@...ilcom> wrote:
> With this applied and ARM_ATAG_DTB_COMPAT_IGNORE_MEM enabled (more
> info in the related patch) ipq806x can boot right away with AUTO_ZRELADDR
> enabled and a correct memory node defined in DTS.
>
> It's needed to ignore MEM ATAGs as most of the time the values from the
> bootloader are hardcoded and OEM didn't care to actually provide them
> resulting in funny situation where a Netgear R7800 with 512Mb of RAM
> have Uboot passing 1.7GB of RAM with ATAGS.

I guess you still need other values from ATAGS, so building a kernel
without CONFIG_ARM_ATAG_DTB_COMPAT is not an option?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds