On Tue, Nov 22, 2016 at 12:32:15AM +0000, David Howells wrote:
> From: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
>
> UEFI machines can be booted in Secure Boot mode. Add a EFI_SECURE_BOOT bit
> for use with efi_enabled.
Please add an explanation what you plan to do with this bit going forward.
Thanks,
Lukas
>
> Signed-off-by: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
> Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
> ---
>
> arch/x86/kernel/setup.c | 5 +++++
> include/linux/efi.h | 1 +
> 2 files changed, 6 insertions(+)
>
> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
> index 9c337b0e8ba7..a197221a451b 100644
> --- a/arch/x86/kernel/setup.c
> +++ b/arch/x86/kernel/setup.c
> @@ -1160,6 +1160,11 @@ void __init setup_arch(char **cmdline_p)
>
> io_delay_init();
>
> + if (boot_params.secure_boot) {
> + set_bit(EFI_SECURE_BOOT, &efi.flags);
> + pr_info("Secure boot enabled\n");
> + }
> +
> /*
> * Parse the ACPI tables for possible boot-time SMP configuration.
> */
> diff --git a/include/linux/efi.h b/include/linux/efi.h
> index 615d8704f048..3864de3b40ad 100644
> --- a/include/linux/efi.h
> +++ b/include/linux/efi.h
> @@ -1066,6 +1066,7 @@ extern int __init efi_setup_pcdp_console(char *);
> #define EFI_ARCH_1 7 /* First arch-specific bit */
> #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_SECURE_BOOT 10 /* Are we in Secure Boot mode? */
>
> #ifdef CONFIG_EFI
> /*
>
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