From: Tom Rini <trini@konsulko.com>
To: "François Ozog" <francois.ozog@linaro.org>
Cc: Simon Glass <sjg@chromium.org>,
Albert Aribaud <albert.u.boot@aribaud.net>,
Heinrich Schuchardt <xypron.glpk@gmx.de>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
Mark Kettenis <mark.kettenis@xs4all.nl>,
Peter Maydell <peter.maydell@linaro.org>,
QEMU Developers <qemu-devel@nongnu.org>,
Sean Anderson <seanga2@gmail.com>,
Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>,
U-Boot Mailing List <u-boot@lists.denx.de>
Subject: Re: [PATCH v5 06/26] arm: qemu: Add a devicetree file for qemu_arm64
Date: Mon, 1 Nov 2021 14:07:07 -0400 [thread overview]
Message-ID: <20211101180707.GJ24579@bill-the-cat> (raw)
In-Reply-To: <CAHFG_=XWc+Fb=m=SHC6=y4KeF533yqCNk=Ae088oAZyjOULPaw@mail.gmail.com>
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On Mon, Nov 01, 2021 at 06:33:35PM +0100, François Ozog wrote:
> Hi Simon
>
> Le lun. 1 nov. 2021 à 17:58, Simon Glass <sjg@chromium.org> a écrit :
>
> > Hi Peter,
> >
> > On Mon, 1 Nov 2021 at 04:48, Peter Maydell <peter.maydell@linaro.org>
> > wrote:
> > >
> > > On Tue, 26 Oct 2021 at 01:33, Simon Glass <sjg@chromium.org> wrote:
> > > >
> > > > Add this file, generated from qemu, so there is a reference devicetree
> > > > in the U-Boot tree.
> > > >
> > > > Signed-off-by: Simon Glass <sjg@chromium.org>
> > >
> > > Note that the dtb you get from QEMU is only guaranteed to work if:
> > > 1) you run it on the exact same QEMU version you generated it with
> > > 2) you pass QEMU the exact same command line arguments you used
> > > when you generated it
> >
> > Yes, I certainly understand that. In general this is not safe, but in
> > practice it works well enough for development and CI.
>
> You recognize that you hijack a product directory with development hack
> facility. There is a test directory to keep things clear. There can be a
> dev-dts or something similar for Dev time tools.
> I have only seen push back on those fake dts files in the dts directory: I
> guess that unless someone strongly favors a continuation of the discussion,
> you may consider re-shaping the proposal to address concerns.
Yes. We need to document how to make development easier. But I'm still
not on board with the notion of including DTS files for platforms where
the source of truth for the DTB is elsewhere. That's going to bring us
a lot more pain.
It is important to make sure our "develop our project" workflow is sane
and relatively pain free. But that needs to not come by making
sacrifices to the "use our project" outcome. I would hope for example
that the new Pi zero platform is just dtb changes, as far as the linux
kernel is concerned which means that for rpi_arm64 (which uses run time
dtb) it also just works. And that's what we want to see.
--
Tom
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next prev parent reply other threads:[~2021-11-01 18:07 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-26 0:23 [PATCH v5 00/26] fdt: Make OF_BOARD a boolean option Simon Glass
2021-10-26 0:23 ` [PATCH v5 01/26] sandbox: Remove OF_HOSTFILE Simon Glass
2021-10-26 0:23 ` [PATCH v5 02/26] doc: Add documentation about devicetree usage Simon Glass
2021-10-26 14:06 ` Ilias Apalodimas
2021-10-26 15:27 ` Simon Glass
2021-10-27 9:29 ` Ilias Apalodimas
2021-10-26 14:31 ` François Ozog
2021-10-26 15:27 ` Simon Glass
2021-10-26 15:57 ` François Ozog
2021-10-27 14:13 ` Simon Glass
2021-10-27 15:38 ` François Ozog
2021-10-27 18:32 ` Simon Glass
2021-10-27 19:12 ` Ilias Apalodimas
2021-10-27 19:52 ` Simon Glass
2021-10-29 10:20 ` Ilias Apalodimas
2021-11-01 15:19 ` Tom Rini
2021-11-02 14:53 ` Simon Glass
2021-11-02 15:38 ` Ilias Apalodimas
2021-11-03 3:29 ` Simon Glass
2021-10-29 17:07 ` François Ozog
2021-11-02 14:53 ` Simon Glass
2021-10-27 19:46 ` François Ozog
2021-10-27 19:48 ` Tom Rini
2021-10-27 20:13 ` François Ozog
2021-10-26 0:23 ` [PATCH v5 03/26] arm: qemu: Mention -nographic in the docs Simon Glass
2021-10-26 0:23 ` [PATCH v5 04/26] arm: riscv: qemu: Explain how to extract the generated dt Simon Glass
2021-10-26 0:23 ` [PATCH v5 05/26] arm: qemu: Add a devicetree file for qemu_arm Simon Glass
2021-10-26 0:23 ` [PATCH v5 06/26] arm: qemu: Add a devicetree file for qemu_arm64 Simon Glass
2021-11-01 10:48 ` Peter Maydell
2021-11-01 16:58 ` Simon Glass
2021-11-01 17:33 ` François Ozog
2021-11-01 18:07 ` Tom Rini [this message]
2021-11-02 15:00 ` Simon Glass
2021-11-02 17:28 ` Tom Rini
2021-11-03 1:29 ` Simon Glass
2021-11-03 5:29 ` François Ozog
2021-11-03 14:41 ` Tom Rini
2021-11-04 11:09 ` Peter Maydell
2021-11-04 11:22 ` François Ozog
2021-11-04 11:41 ` Peter Maydell
2021-11-04 11:48 ` François Ozog
2021-11-03 14:44 ` François Ozog
2021-11-03 14:39 ` Tom Rini
2021-11-02 14:59 ` Simon Glass
2021-11-02 16:57 ` Tom Rini
2021-11-03 1:32 ` Simon Glass
2021-11-03 14:39 ` Tom Rini
2021-10-26 0:23 ` [PATCH v5 07/26] riscv: qemu: Add devicetree files for qemu_riscv32/64 Simon Glass
2021-10-26 0:23 ` [PATCH v5 08/26] arm: rpi: Add a devicetree file for rpi_4 Simon Glass
2021-10-26 0:23 ` [PATCH v5 09/26] arm: vexpress: Add a devicetree file for juno Simon Glass
2021-10-26 0:23 ` [PATCH v5 10/26] arm: xenguest_arm64: Add a fake devicetree file Simon Glass
2021-10-26 0:23 ` [PATCH v5 11/26] arm: octeontx: " Simon Glass
2021-10-26 0:23 ` [PATCH v5 12/26] arm: xilinx_versal_virt: Add a " Simon Glass
2021-10-26 0:23 ` [PATCH v5 13/26] arm: bcm7xxx: " Simon Glass
2021-10-26 0:23 ` [PATCH v5 14/26] arm: qemu-ppce500: " Simon Glass
2021-10-26 0:23 ` [PATCH v5 15/26] arm: highbank: Add a fake " Simon Glass
2021-10-26 0:23 ` [PATCH v5 16/26] fdt: Make OF_BOARD a bool option Simon Glass
2021-10-26 0:23 ` [PATCH v5 17/26] Drop CONFIG_BINMAN_STANDALONE_FDT Simon Glass
2021-10-26 0:23 ` [PATCH v5 18/26] doc: Update info on devicetree update Simon Glass
2021-10-26 0:23 ` [PATCH v5 19/26] fdt: Move MULTI_DTB_FIT handling out of fdtdec_setup() Simon Glass
2021-10-29 5:49 ` Ilias Apalodimas
2021-10-26 0:23 ` [PATCH v5 20/26] fdt: Drop #ifdefs with MULTI_DTB_FIT Simon Glass
2021-10-29 5:55 ` Ilias Apalodimas
2021-10-26 0:23 ` [PATCH v5 21/26] fdt: Drop CONFIG_SPL_BUILD check in fdtdec_setup() Simon Glass
2021-10-26 0:23 ` [PATCH v5 22/26] fdt: Drop #ifdef around board_fdt_blob_setup() Simon Glass
2021-10-26 0:23 ` [PATCH v5 25/26] fdt: Drop remaining preprocessor macros in fdtdec_setup() Simon Glass
2021-10-26 0:23 ` [PATCH v5 26/26] fdt: Don't call board_fdt_blob_setup() without OF_BOARD Simon Glass
2021-10-26 13:55 ` Ilias Apalodimas
2021-10-26 15:27 ` Simon Glass
2021-10-27 7:17 ` Ilias Apalodimas
2021-10-27 19:12 ` Tom Rini
2021-10-27 21:33 ` François Ozog
2021-10-27 21:44 ` Tom Rini
2021-10-26 6:07 ` [PATCH v5 00/26] fdt: Make OF_BOARD a boolean option François Ozog
2021-10-27 14:08 ` Simon Glass
2021-10-27 15:14 ` François Ozog
2021-10-27 18:23 ` Simon Glass
2021-10-27 19:25 ` Tom Rini
2021-11-03 16:45 ` Simon Glass
2021-11-03 17:21 ` Tom Rini
2021-10-27 20:07 ` François Ozog
2021-11-03 1:20 ` Simon Glass
2021-11-03 4:45 ` François Ozog
2021-10-27 22:30 ` Mark Kettenis
2021-11-03 1:20 ` Simon Glass
2021-11-03 8:22 ` Mark Kettenis
2021-11-03 16:02 ` Tom Rini
2021-11-03 16:45 ` Simon Glass
2021-11-03 17:36 ` Mark Kettenis
2021-11-03 15:56 ` Tom Rini
2021-11-03 16:45 ` Simon Glass
2021-10-27 15:36 ` Tuomas Tynkkynen
2021-10-27 19:13 ` Tom Rini
2021-10-27 18:16 ` Tom Rini
2021-10-27 18:24 ` Tom Rini
2021-11-03 17:13 ` François Ozog
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