From: George Guo <dongtai.guo@linux.dev>
To: pratyush@kernel.org
Cc: chenhuacai@kernel.org, dongtai.guo@linux.dev, graf@amazon.com,
guodongtai@kylinos.cn, kernel@xen0n.name,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-mm@kvack.org,
liukexin@kylinos.cn, loongarch@lists.linux.dev,
pasha.tatashin@soleen.com, rppt@kernel.org, shuah@kernel.org
Subject: Re: [PATCH 1/7] LoongArch: Add KHO basic support
Date: Thu, 28 May 2026 21:26:53 +0800 [thread overview]
Message-ID: <20260528132653.190981-1-dongtai.guo@linux.dev> (raw)
In-Reply-To: <2vxztsrv5r6y.fsf@kernel.org>
On Mon, May 25 2026, Pratyush Yadav wrote:
Hi Pratyush,
> Do you have nothing else for a bootloader to pass data to the kernel?
> Passing this via the command line seems crazy... All these addresses are
> now available directly to unprivileged userspace. Can't you use the
> device tree like we do on ARM64?
>
> Also, this commandline parameter isn't documented anywhere.
I have tried the FDT /chosen approach, storing the KHO metadata as
linux,kho-fdt and linux,kho-scratch properties (the same properties
that drivers/of/kexec.c:kho_add_chosen() writes
and drivers/of/fdt.c:early_init_dt_check_kho() reads).
This passes the KHO selftest when the system boots with FDT.
I am currently debugging the ACPI boot case.
Thanks for your advice!
--
Regards,
George Guo
next prev parent reply other threads:[~2026-05-28 13:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-25 6:28 [PATCH 0/7] LoongArch: add KHO support and selftests George Guo
2026-05-25 6:28 ` [PATCH 1/7] LoongArch: Add KHO basic support George Guo
2026-05-25 17:34 ` Pratyush Yadav
2026-05-28 13:26 ` George Guo [this message]
2026-05-25 6:28 ` [PATCH 2/7] LoongArch: kho: strip stale kho_handover= from reused cmdline George Guo
2026-05-25 17:49 ` Pratyush Yadav
2026-05-25 6:28 ` [PATCH 3/7] LoongArch: Add missing linux/mm.h include in asm/io.h George Guo
2026-05-25 6:28 ` [PATCH 4/7] LoongArch: kexec: avoid overwriting QEMU's machine FDT at 0x100000 George Guo
2026-05-25 6:28 ` [PATCH 5/7] selftests/kho: add LoongArch vmtest support George Guo
2026-05-25 6:28 ` [PATCH 6/7] selftests/kho: LoongArch: disable PS/2 input devices for QEMU virt George Guo
2026-05-25 6:28 ` [PATCH 7/7] selftests/kho: handle QEMU not exiting after kexec on LoongArch George Guo
2026-05-25 7:48 ` Mike Rapoport
2026-05-25 7:48 ` [PATCH 0/7] LoongArch: add KHO support and selftests Mike Rapoport
2026-05-25 10:25 ` Huacai Chen
2026-05-25 11:24 ` Mike Rapoport
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