linux-kernel - Re: [PATCH v5 12/16] arm64: add KHO support

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Message-ID: <20250320232956.327827-1-changyuanl@google.com>
Date: Thu, 20 Mar 2025 16:29:56 -0700
From: Changyuan Lyu <changyuanl@...gle.com>
To: krzk@...nel.org
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Subject: Re: [PATCH v5 12/16] arm64: add KHO support

Hi, Krzysztof

On Thu, Mar 20, 2025 at 08:13:24 +0100, Krzysztof Kozlowski <krzk@...nel.org> wrote:
> On 20/03/2025 02:55, Changyuan Lyu wrote:
> >
> > +/**
> > + * early_init_dt_check_kho - Decode info required for kexec handover from DT
> > + */
> > +static void __init early_init_dt_check_kho(void)
> > +{
> > +	unsigned long node = chosen_node_offset;
> > +	u64 kho_start, scratch_start, scratch_size;
> > +	const __be32 *p;
> > +	int l;
> > +
> > +	if (!IS_ENABLED(CONFIG_KEXEC_HANDOVER) || (long)node < 0)
> > +		return;
> > +
> > +	p = of_get_flat_dt_prop(node, "linux,kho-fdt", &l);
>
>
> You are adding undocumented ABI for OF properties. That's not what was
> explained last time.

Thanks for the reminder! Sorry I missed [1].
I drafted a PR to add the documentation:
https://github.com/devicetree-org/dt-schema/pull/158 .

[1] https://lore.kernel.org/all/b1e59928-b2f4-47d4-87b8-424234c52f8d@kernel.org/

Best,
Changyuan