linux-kernel - Re: LoongArch without CONFIG_ACPI and CONFIG

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Message-ID: <Ztu-9qgiKS98c0hl@zx2c4.com>
Date: Sat, 7 Sep 2024 04:48:22 +0200
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: Huacai Chen <chenhuacai@...nel.org>
Cc: maobibo <maobibo@...ngson.cn>, gaosong@...ngson.cn,
	jiaxun.yang@...goat.com, qemu-devel@...gnu.org, thomas@...ch.de,
	xry111@...111.site, loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org, Jinyang He <hejinyang@...ngson.cn>,
	Tiezhu Yang <yangtiezhu@...ngson.cn>
Subject: Re: LoongArch without CONFIG_ACPI and CONFIG_EFI

On Sat, Sep 07, 2024 at 09:47:38AM +0800, Huacai Chen wrote:
> On Sat, Sep 7, 2024 at 9:44 AM maobibo <maobibo@...ngson.cn> wrote:
> >
> > Add huacai who is maintainer of Loongarch Linux kernel.
> >
> > On 2024/9/6 下午10:55, Jason A. Donenfeld wrote:
> > > Hi,
> > >
> > > It appears that as of QEMU 9.1, it's possible to boot LoongArch machines
> > > that don't provide EFI or ACPI.
> > >
> > > Would you consider removing the `select ACPI` and `select EFI` from the
> > > arch Kconfig, so that kernels built for this minimal QEMU environment
> > > can be a bit leaner and quicker to build?
> Very difficult, at least removing EFI is difficult. Even if booting to
> a FDT environment, we still get information from EFI now.

Makes sense. !ACPI is the more interesting one for me, anyway, as that
takes a while to build.