Re: [RFC, PATCH 21/22] x86/mm: Introduce page_keyid() and page_encrypted()

[Dave Hansen]

On 03/05/2018 08:26 AM, Kirill A. Shutemov wrote:
> +static inline bool page_encrypted(struct page *page)
> +{
> +	/* All pages with non-zero KeyID are encrypted */
> +	return page_keyid(page) != 0;
> +}

Is this true?  I thought there was a KEYID_NO_ENCRYPT "Do not encrypt
memory when this KeyID is in use."  Is that really only limited to key 0.