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@redhat.com>
[ Use efi_enabled() instead of IS_ENABLED(CONFIG_EFI). ]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/1486380166-31868-7-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 4cfba947d774..69780edf0dde 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();