Re: [PATCH v3 14/19] board: emulation: Add qemu-loongarch

[Yao Zi <me@ziyao.cc>]

On Fri, Aug 21, 2026 at 10:20:55AM -0600, Tom Rini wrote:
> On Fri, Aug 21, 2026 at 08:42:14AM +0000, Yao Zi wrote:
> 
> > From: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > 
> > Yet another generic QEMU VIRT machine.
> > 
> > LoongArch QEMU splits the main RAM into two parts: the first 512M is
> > placed at 0x0, and the rest is placed at 0x8000000. FDT locates at
> > 0x100000. BIOS is mapped to the first flash mapped to 0x1c000000, where
> > U-Boot starts execution.
> > 
> > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > Signed-off-by: Yao Zi <me@ziyao.cc>
> [snip]
> > diff --git a/arch/loongarch/dts/qemu-loongarch64.dts b/arch/loongarch/dts/qemu-loongarch64.dts
> > new file mode 100644
> > index 000000000000..39d303798fcb
> > --- /dev/null
> > +++ b/arch/loongarch/dts/qemu-loongarch64.dts
> > @@ -0,0 +1,9 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
> > + */
> > +
> > +/dts-v1/;
> > +
> > +/ {
> > +};
> 
> I thought I had pushed everything so that we do not need to have fake
> empty dts files anymore.

Do you mean OF_OMIT_DTB? Even with it enabled, a devicetree blob,
specified by CONFIG_dEFAULT_DEVICE_TREE, is always built, but not
integrated in the final u-boot.bin.

qemu_arm_defconfig also ships an empty devicetree. I'm not sure whether
there's really a way to avoid building a dtb...

> -- 
> Tom

Best regards,
Yao Zi