From: Mark Rutland <mark.rutland@arm.com>
To: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, Jaxson Han <jaxson.han@arm.com>
Subject: Re: [boot-wrapper PATCH v2 6/9] configure: Use earlycon instead of earlyprintk
Date: Fri, 7 Jan 2022 14:14:57 +0000 [thread overview]
Message-ID: <YdhK4YhQu3MsQnir@FVFF77S0Q05N> (raw)
In-Reply-To: <YdhHwXr0pp9d+nRn@FVFF77S0Q05N>
On Fri, Jan 07, 2022 at 02:01:37PM +0000, Mark Rutland wrote:
> On Wed, Dec 22, 2021 at 06:16:04PM +0000, Andre Przywara wrote:
> > The arm64 Linux kernel dropped support for the "earlyprintk" command line
> > parameter a long time ago[1], instead it uses the earlycon parameter
> > now.
> >
> > Replace earlyprintk with earlycon on the default command line, to see
> > early kernel output.
> >
> > Ideally we would just say "earlycon" (without specifying an MMIO
> > address), but this relies on the stdout-path property in the /chosen
> > node, which the model DTs do not carry.
>
> Can we send a Linux patch to add that?
>
> Mark.
For clarity, I'm going to apply this patch regardless; the above just seems
like a nice-to-have.
Mark.
>
> > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8ef0ed95ee04
> >
> > Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> > ---
> > configure.ac | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/configure.ac b/configure.ac
> > index 2b295de..9e3b722 100644
> > --- a/configure.ac
> > +++ b/configure.ac
> > @@ -99,7 +99,7 @@ AC_SUBST([FILESYSTEM], [$USE_INITRD])
> > AM_CONDITIONAL([INITRD], [test "x$USE_INITRD" != "x"])
> >
> > AS_IF([test "x$X_IMAGE" = "x"],[C_CONSOLE="ttyAMA0"],[C_CONSOLE="hvc0"])
> > -C_CMDLINE="console=$C_CONSOLE earlyprintk=pl011,0x1c090000"
> > +C_CMDLINE="console=$C_CONSOLE earlycon=pl011,0x1c090000"
> > AC_ARG_WITH([cmdline],
> > AS_HELP_STRING([--with-cmdline], [set a command line for the kernel]),
> > [C_CMDLINE=$withval])
> > --
> > 2.25.1
> >
>
> _______________________________________________
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> linux-arm-kernel@lists.infradead.org
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next prev parent reply other threads:[~2022-01-07 14:16 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-22 18:15 [boot-wrapper PATCH v2 0/9] Various (build system) fixes Andre Przywara
2021-12-22 18:15 ` [boot-wrapper PATCH v2 1/9] Makefile: Avoid .got section creation Andre Przywara
2022-01-07 13:49 ` Mark Rutland
2021-12-22 18:16 ` [boot-wrapper PATCH v2 2/9] Add standard headers Andre Przywara
2022-01-07 13:49 ` Mark Rutland
2022-01-07 14:31 ` Andre Przywara
2022-01-11 11:34 ` Mark Rutland
2021-12-22 18:16 ` [boot-wrapper PATCH v2 3/9] Makefile: Tell compiler to generate bare-metal code Andre Przywara
2022-01-07 13:53 ` Mark Rutland
2022-01-07 14:38 ` Andre Przywara
2022-01-11 11:30 ` Mark Rutland
2022-01-18 12:52 ` Andre Przywara
2022-01-18 14:10 ` Ard Biesheuvel
2021-12-22 18:16 ` [boot-wrapper PATCH v2 4/9] configure: Make PSCI the default boot method Andre Przywara
2022-01-07 14:12 ` Mark Rutland
2021-12-22 18:16 ` [boot-wrapper PATCH v2 5/9] configure: Fix default DTB Andre Przywara
2022-01-07 14:13 ` Mark Rutland
2021-12-22 18:16 ` [boot-wrapper PATCH v2 6/9] configure: Use earlycon instead of earlyprintk Andre Przywara
2022-01-07 14:01 ` Mark Rutland
2022-01-07 14:14 ` Mark Rutland [this message]
2022-01-07 14:47 ` Andre Przywara
2021-12-22 18:16 ` [boot-wrapper PATCH v2 7/9] pointer auth: Document CPU feature bit mask Andre Przywara
2022-01-07 14:15 ` Mark Rutland
2021-12-22 18:16 ` [boot-wrapper PATCH v2 8/9] configure: Autodetect GICv3 Andre Przywara
2022-01-07 14:19 ` Mark Rutland
2021-12-22 18:16 ` [boot-wrapper PATCH v2 9/9] avoid dtc warnings on re-compiling DTB Andre Przywara
2022-01-07 13:59 ` Mark Rutland
2022-01-13 18:42 ` Vladimir Murzin
2022-01-13 19:50 ` Andre Przywara
2022-01-14 8:35 ` Vladimir Murzin
2022-01-14 10:44 ` Mark Rutland
2022-01-14 12:09 ` Andre Przywara
2022-01-19 12:02 ` Mark Rutland
2022-01-07 14:25 ` [boot-wrapper PATCH v2 0/9] Various (build system) fixes Mark Rutland
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