linux-kernel - [tip:efi/core] efi: Print the secure boot status in x86 setup

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Message-ID: <tip-9661b332041dab63ba2e5222b40a9f916c1368a9@git.kernel.org>
Date:   Tue, 7 Feb 2017 01:48:33 -0800
From:   tip-bot for David Howells <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, torvalds@...ux-foundation.org, hpa@...or.com,
        linux-kernel@...r.kernel.org, ard.biesheuvel@...aro.org,
        matt@...eblueprint.co.uk, dhowells@...hat.com, mingo@...nel.org,
        peterz@...radead.org
Subject: [tip:efi/core] efi: Print the secure boot status in x86
 setup_arch()

Commit-ID:  9661b332041dab63ba2e5222b40a9f916c1368a9
Gitweb:     http://git.kernel.org/tip/9661b332041dab63ba2e5222b40a9f916c1368a9
Author:     David Howells <dhowells@...hat.com>
AuthorDate: Mon, 6 Feb 2017 11:22:45 +0000
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 7 Feb 2017 10:42:10 +0100

efi: Print the secure boot status in x86 setup_arch()

Print the secure boot status in the x86 setup_arch() function, but otherwise do
nothing more for now. More functionality will be added later, but this at
least allows for testing.

Signed-off-by: David Howells <dhowells@...hat.com>
[ Use efi_enabled() instead of IS_ENABLED(CONFIG_EFI). ]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Matt Fleming <matt@...eblueprint.co.uk>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-efi@...r.kernel.org
Link: http://lkml.kernel.org/r/1486380166-31868-7-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/setup.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 4cfba94..69780ed 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1176,6 +1176,20 @@ void __init setup_arch(char **cmdline_p)
 	/* Allocate bigger log buffer */
 	setup_log_buf(1);
 
+	if (efi_enabled(EFI_BOOT)) {
+		switch (boot_params.secure_boot) {
+		case efi_secureboot_mode_disabled:
+			pr_info("Secure boot disabled\n");
+			break;
+		case efi_secureboot_mode_enabled:
+			pr_info("Secure boot enabled\n");
+			break;
+		default:
+			pr_info("Secure boot could not be determined\n");
+			break;
+		}
+	}
+
 	reserve_initrd();
 
 	acpi_table_upgrade();