Re: [PATCH, RFC 52/62] x86/mm: introduce common code for mem encryption

[Christoph Hellwig]

On Wed, May 08, 2019 at 05:44:12PM +0300, Kirill A. Shutemov wrote:
> +EXPORT_SYMBOL_GPL(__mem_encrypt_dma_set);
> +
> +phys_addr_t __mem_encrypt_dma_clear(phys_addr_t paddr)
> +{
> +	if (sme_active())
> +		return __sme_clr(paddr);
> +
> +	return paddr & ~mktme_keyid_mask;
> +}
> +EXPORT_SYMBOL_GPL(__mem_encrypt_dma_clear);

In general nothing related to low-level dma address should ever
be exposed to modules.  What is your intended user for these two?