x86/sev-es: Print SEV-ES info into the kernel log (c685eb0c) · Commits · 戴 / test

Refactor the message printed to the kernel log which indicates whether SEV or SME, etc is active. This will scale better in the future when more memory encryption features might be added. Also add SEV-ES to the list of features. [ bp: Massage. ] Signed-off-by:

Joerg Roedel <jroedel@suse.de> Signed-off-by:

Borislav Petkov <bp@suse.de> Reviewed-by:

Kees Cook <keescook@chromium.org> Link: https://lkml.kernel.org/r/20200907131613.12703-38-joro@8bytes.org

arch/x86/mm/mem_encrypt.c

+26 −3

Original line number	Diff line number	Diff line
		@@ -407,6 +407,31 @@ void __init mem_encrypt_free_decrypted_mem(void)
		free_init_pages("unused decrypted", vaddr, vaddr_end);
		}

		static void print_mem_encrypt_feature_info(void)
		{
		pr_info("AMD Memory Encryption Features active:");

		/* Secure Memory Encryption */
		if (sme_active()) {
		/*
		* SME is mutually exclusive with any of the SEV
		* features below.
		*/
		pr_cont(" SME\n");
		return;
		}

		/* Secure Encrypted Virtualization */
		if (sev_active())
		pr_cont(" SEV");

		/* Encrypted Register State */
		if (sev_es_active())
		pr_cont(" SEV-ES");

		pr_cont("\n");
		}

		/* Architecture __weak replacement functions */
		void __init mem_encrypt_init(void)
		{
		@@ -422,8 +447,6 @@ void __init mem_encrypt_init(void)
		if (sev_active())
		static_branch_enable(&sev_enable_key);

		pr_info("AMD %s active\n",
		sev_active() ? "Secure Encrypted Virtualization (SEV)"
		: "Secure Memory Encryption (SME)");
		print_mem_encrypt_feature_info();
		}

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