Subject: Re: [PATCH 07/11] treewide: Replace the use of mem_encrypt_active() with prot_guest_has()

From: Sean Christopherson <[email-masked]>
Date: Fri, 30 Jul 2021 22:34:37 +0000

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");