On Wed, May 24, 2017 at 03:45:32PM +0100, David Howells wrote:
> From: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
>
> UEFI machines can be booted in Secure Boot mode. Add a EFI_SECURE_BOOT bit
> that can be passed to efi_enabled() to find out whether secure boot is
> enabled.
>
> This will be used by the SysRq+x handler, registered by the x86 arch, to
> find out whether secure boot mode is enabled so that it can be disabled.
>
> Signed-off-by: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
> Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
> cc: linux-efi@xxxxxxxxxxxxxxx
Reviewed-by: Joey Lee <jlee@xxxxxxxx>
Regards
Joey Lee
> ---
>
> drivers/firmware/efi/secureboot.c | 1 +
> include/linux/efi.h | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/drivers/firmware/efi/secureboot.c b/drivers/firmware/efi/secureboot.c
> index cf5bccae15e8..730518061a14 100644
> --- a/drivers/firmware/efi/secureboot.c
> +++ b/drivers/firmware/efi/secureboot.c
> @@ -24,6 +24,7 @@ void __init efi_set_secure_boot(enum efi_secureboot_mode mode)
> pr_info("Secure boot disabled\n");
> break;
> case efi_secureboot_mode_enabled:
> + set_bit(EFI_SECURE_BOOT, &efi.flags);
> pr_info("Secure boot enabled\n");
> break;
> default:
> diff --git a/include/linux/efi.h b/include/linux/efi.h
> index e2f53edccf15..5e9a2d7df089 100644
> --- a/include/linux/efi.h
> +++ b/include/linux/efi.h
> @@ -1081,6 +1081,7 @@ extern int __init efi_setup_pcdp_console(char *);
> #define EFI_DBG 8 /* Print additional debug info at runtime */
> #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
> #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
> +#define EFI_SECURE_BOOT 11 /* Are we in Secure Boot mode? */
>
> #ifdef CONFIG_EFI
> /*
>
> --
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