From: "Arnd Bergmann" <arnd@arndb.de>
To: "Dmitry Rokosov" <ddrokosov@sberdevices.ru>,
"Neil Armstrong" <neil.armstrong@linaro.org>
Cc: "Alexey Romanov" <avromanov@sberdevices.ru>,
"Rob Herring" <robh+dt@kernel.org>,
krzysztof.kozlowski+dt@linaro.org,
"Kevin Hilman" <khilman@baylibre.com>,
jbrunet@baylibre.com, martin.blumenstingl@googlemail.com,
"Linus Walleij" <linus.walleij@linaro.org>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
kernel@sberdevices.ru
Subject: Re: [PATCH v1 0/3] Meson A1 32-bit support
Date: Mon, 27 Feb 2023 19:19:38 +0100 [thread overview]
Message-ID: <7d29f3fd-b8c8-4687-b6a0-b8956dd39f0b@app.fastmail.com> (raw)
In-Reply-To: <20230227165049.4y7jx5nnnlibe6kg@CAB-WSD-L081021>
On Mon, Feb 27, 2023, at 17:50, Dmitry Rokosov wrote:
> On Mon, Feb 27, 2023 at 05:38:49PM +0100, Neil Armstrong wrote:
>> On 27/02/2023 17:15, Arnd Bergmann wrote:
>> > On Mon, Feb 27, 2023, at 16:51, Dmitry Rokosov wrote:
>> >
>> > Most of these don't apply in userspace, so the incentive to
>> > run smaller 32-bit userland on systems with less than 1GB of
>> > RAM usually outweighs the benefits of 64-bit userspace.
>>
>> Thanks for the details!
>
> Looks like Thomas has already prepared a basic patch series for buildroot,
> but maintainers declined it.
>
> https://lore.kernel.org/all/20220730194331.GA2515056@scaer/
I see. I know very little about buildroot, but it sounds like
there are other ways of doing the same thing here. In general,
this is pretty much an Arm specific problem. While you clearly
want compat mode for small userland on any architecture but don't
want 32-bit kernels, arm is the only one that has a different
kernel "ARCH=" value and needs a separate gcc toolchain.
If the problem is only the toolchain, an easy way out may
be to use clang instead of gcc as your compiler, as a single
clang binary can target both 32-bit userland and 64-bit kernel
on all supported architectures.
Arnd
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next prev parent reply other threads:[~2023-02-27 18:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-22 11:50 [PATCH v1 0/3] Meson A1 32-bit support Alexey Romanov
2023-02-22 11:50 ` [PATCH v1 1/3] meson: pinctrl: use CONFIG_PINCTRL_A1 with CONFIG_ARM Alexey Romanov
2023-03-06 13:45 ` Linus Walleij
2023-03-06 13:49 ` neil.armstrong
2023-03-06 13:52 ` Linus Walleij
2023-02-22 11:50 ` [PATCH v1 2/3] firmware: meson: use CONFIG_MESON_SM " Alexey Romanov
2023-02-22 11:50 ` [PATCH v1 3/3] arch/arm: dts: introduce meson-a1 device tree Alexey Romanov
2023-02-23 9:08 ` Krzysztof Kozlowski
2023-02-23 9:09 ` Krzysztof Kozlowski
2023-02-27 14:39 ` Dmitry Rokosov
2023-02-27 14:41 ` Krzysztof Kozlowski
2023-02-27 8:15 ` [PATCH v1 0/3] Meson A1 32-bit support neil.armstrong
2023-02-27 14:28 ` Dmitry Rokosov
2023-02-27 14:46 ` neil.armstrong
2023-02-27 16:01 ` Dmitry Rokosov
2023-02-27 14:58 ` Arnd Bergmann
2023-02-27 15:51 ` Dmitry Rokosov
2023-02-27 16:15 ` Arnd Bergmann
2023-02-27 16:37 ` Dmitry Rokosov
2023-02-27 16:38 ` Neil Armstrong
2023-02-27 16:50 ` Dmitry Rokosov
2023-02-27 18:19 ` Arnd Bergmann [this message]
2023-02-28 8:49 ` Dmitry Rokosov
2023-03-09 21:52 ` Kevin Hilman
2023-03-10 15:20 ` Dmitry Rokosov
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