[PATCH 2/3] platform: generic: spacemit: k3: override cold_boot_allowed for hart 0 only

[Troy Mitchell]

On Mon, Aug 31, 2026 at 10:07 PM +0200, Valentin Haudiquet wrote:
> Only hart 0 is powered at reset on K3.  Without overriding
> cold_boot_allowed, the generic default checks a DTB hart mask which may
> allow non-hart-0 harts to attempt cold boot, breaking the coldboot
> lottery on a platform where only one hart is running.
>
> Add spacemit_k3_cold_boot_allowed() returning true only for hart 0,
> matching K1's pattern.
>
> +static bool spacemit_k3_cold_boot_allowed(u32 hartid)
> +{
> +	return !hartid;
> +}

This matches the K3 boot contract and the vendor OpenSBI behavior. Only
hart 0 should participate in the cold-boot lottery; this does not affect
starting secondary harts later through HSM.

As you mentioned in the cover letter that I could take these patches, I
will include this patch in the next revision of my series, retaining your
authorship and Signed-off-by.

                                            - Troy
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