# Re: \[PATCH 07/11\] treewide: Replace the use of mem\_encrypt\_active() with prot\_guest\_has()

- From: Sean Christopherson \<seanjc@google.com\>
- Date: 2021-07-30 22:34:49 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/07/211382
- Thread: https://ratatoskr.run/linuxppc-dev/2021/07/211118/t.md

```text
On Tue, Jul 27, 2021, Tom Lendacky wrote:
> @@ -451,7 +450,7 @@ void __init mem_encrypt_free_decrypted_mem(void)
>  	 * The unused memory range was mapped decrypted, change the encryption
>  	 * attribute from decrypted to encrypted before freeing it.
>  	 */
> -	if (mem_encrypt_active()) {
> +	if (sme_me_mask) {

Any reason this uses sme_me_mask?  The helper it calls, __set_memory_enc_dec(),
uses prot_guest_has(PATTR_MEM_ENCRYPT) so I assume it's available?

>  		r = set_memory_encrypted(vaddr, npages);
>  		if (r) {
>  			pr_warn("failed to free unused decrypted pages\n");

```