[PATCH v14 26/44] arm64: RMI: Allow populating initial contents

[Ackerley Tng]

Steven Price <steven.price at arm.com> writes:

>
> [...snip...]
>
> +
> +static int populate_region_cb(struct kvm *kvm, gfn_t gfn, kvm_pfn_t pfn,
> +			      struct page *src_page, void *opaque)
> +{
> +	unsigned long data_flags = *(unsigned long *)opaque;
> +	phys_addr_t ipa = gfn_to_gpa(gfn);
> +
> +	if (!src_page)
> +		return -EOPNOTSUPP;

Came here from [0]!

Sean recently moved this check to before kvm_gmem_populate() was called
and returned -EINVAL [1]. I think the rationale would also apply for
CCA.

[0] https://lore.kernel.org/all/114e2488-97ed-4740-a8e8-1edd991f26c5@arm.com/
[1] https://lore.kernel.org/all/20260630213711.479692-3-seanjc@google.com/

> +
> +	return realm_data_map_init(kvm, ipa, pfn, page_to_pfn(src_page),
> +				   data_flags);
> +}
> +
>
> [...snip...]
>