From: Ard Biesheuvel <ardb@kernel.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "Bert Vermeulen" <bert@biot.com>, "Arnd Bergmann" <arnd@arndb.de>,
DTML <devicetree@vger.kernel.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
"Russell King" <linux@armlinux.org.uk>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Geert Uytterhoeven" <geert+renesas@glider.be>,
"Anshuman Khandual" <anshuman.khandual@arm.com>,
"Krzysztof Kozlowski" <krzysztof.kozlowski@canonical.com>,
"John Crispin" <john@phrozen.org>,
"YiFei Zhu" <yifeifz2@illinois.edu>,
"Mike Rapoport" <rppt@kernel.org>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Kees Cook" <keescook@chromium.org>,
"Masahiro Yamada" <masahiroy@kernel.org>,
"Nathan Chancellor" <nathan@kernel.org>,
"Viresh Kumar" <viresh.kumar@linaro.org>,
"Felix Fietkau" <nbd@nbd.name>
Subject: Re: [PATCH 4/5] ARM: Add basic support for EcoNet EN7523 SoC
Date: Mon, 9 Aug 2021 14:49:28 +0200 [thread overview]
Message-ID: <CAMj1kXFUpb6JYndtX9LPpr-dOFQ2-m7n0z70+7Bh-JHhnfoMpw@mail.gmail.com> (raw)
In-Reply-To: <CAMuHMdWni=2ggV7dQiy-nfF1nOmKferbZOCkLp0kDsvMNfwF2Q@mail.gmail.com>
On Mon, 9 Aug 2021 at 14:46, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
> Hoi Bert,
>
> On Wed, Aug 4, 2021 at 6:43 PM Bert Vermeulen <bert@biot.com> wrote:
> > On 7/30/21 4:48 PM, Arnd Bergmann wrote:
> > > On Fri, Jul 30, 2021 at 3:45 PM Bert Vermeulen <bert@biot.com> wrote:
> > >> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> > >> index 173da685a52e..1bff0aa29c07 100644
> > >> --- a/arch/arm/Makefile
> > >> +++ b/arch/arm/Makefile
> > >> @@ -152,6 +152,7 @@ textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
> > >> textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
> > >> textofs-$(CONFIG_ARCH_MESON) := 0x00208000
> > >> textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
> > >> +textofs-$(CONFIG_ARCH_ECONET) := 0x00088000
> > >
> > > Why is this needed?
> > >
> > > Note also the comment directly above it exlaining
> > > # Text offset. This list is sorted numerically by address in order to
> > > # provide a means to avoid/resolve conflicts in multi-arch kernels.
> >
> > I didn't make that patch, but it turns out it's needed to get PSCI working;
> > detection hangs without it. That makes no sense to me, but I'll examine further.
>
> Probably PSCI relies on the memory contents at the start of RAM not
> being overwritten?
> Does it help if you remove the first 512 KiB from the /memory node
I /think/ we rely on the first memblock being mappable using section
mappings, so it might be better to remove the first 1 MB (or 2 MB in
case the platform is LPAE capable). Note that this memory is discarded
in any case, so this change is not as costly as it may seem.
> (which should be declared in en7523-evb.dts instead of en7523.dtsi
> BTW)?
>
> Gr{oetje,eeting}s,
>
> Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
>
> 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
next prev parent reply other threads:[~2021-08-09 12:49 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 13:45 [PATCH 0/4] Add support for EcoNet EN7523 SoC Bert Vermeulen
2021-07-30 13:45 ` [PATCH 1/5] dt-bindings: Add vendor prefix for EcoNet Bert Vermeulen
2021-08-06 21:02 ` Rob Herring
2021-07-30 13:45 ` [PATCH 2/5] dt-bindings: arm: econet: Add binding for EN7523 SoC and EVB Bert Vermeulen
2021-08-06 21:04 ` Rob Herring
2021-07-30 13:45 ` [PATCH 3/5] ARM: dts: Add basic support for EcoNet EN7523 Bert Vermeulen
2021-07-30 14:31 ` Linus Walleij
[not found] ` <87y29n26po.wl-maz@kernel.org>
2021-08-01 9:07 ` Bert Vermeulen
2021-08-01 9:40 ` Arnd Bergmann
2021-07-30 14:45 ` Daniel Palmer
2021-07-30 14:46 ` Mark Rutland
2021-08-04 16:41 ` Bert Vermeulen
2021-08-06 20:59 ` Rob Herring
2021-07-30 14:59 ` Mark Rutland
2021-08-06 20:52 ` Rob Herring
2021-07-30 16:47 ` Andre Przywara
2021-07-30 13:45 ` [PATCH 4/5] ARM: Add basic support for EcoNet EN7523 SoC Bert Vermeulen
2021-07-30 14:48 ` Arnd Bergmann
2021-07-30 15:15 ` John Crispin
2021-07-30 16:55 ` Arnd Bergmann
2021-08-01 16:44 ` Ard Biesheuvel
2021-09-03 16:20 ` Felix Fietkau
2021-09-03 17:47 ` Ard Biesheuvel
2021-08-04 16:43 ` Bert Vermeulen
2021-08-09 12:46 ` Geert Uytterhoeven
2021-08-09 12:49 ` Ard Biesheuvel [this message]
2021-08-09 13:00 ` Bert Vermeulen
2021-07-30 13:45 ` [PATCH 5/5] ARM: multi_v7_defconfig: Add " Bert Vermeulen
2021-07-30 14:26 ` [PATCH 0/4] " Linus Walleij
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