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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: suse.com X-MS-Exchange-CrossTenant-Network-Message-Id: 55aab5a2-b9d1-4d72-ced9-08d8702db285 X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB4928.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Oct 2020 10:41:24.7566 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: f7a17af6-1c5c-4a36-aa8b-f5be247aa4ba X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: MRaqifrhK93lK3E0ScLbWudPlFF0zcbthqn65iARrB5VLEozWXx9xIKXpX+E0woh X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0402MB3600 Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org Separate the get_sb_mode() from arch/x86 and treat it as a common function [rename to efi_get_secureboot_mode] so all EFI-based architectures can reuse the same logic. Signed-off-by: Chester Lin --- arch/x86/kernel/ima_arch.c | 47 ++------------------------------------ drivers/firmware/efi/efi.c | 43 ++++++++++++++++++++++++++++++++++ include/linux/efi.h | 5 ++++ 3 files changed, 50 insertions(+), 45 deletions(-) diff --git a/arch/x86/kernel/ima_arch.c b/arch/x86/kernel/ima_arch.c index 7dfb1e808928..ed4623ecda6e 100644 --- a/arch/x86/kernel/ima_arch.c +++ b/arch/x86/kernel/ima_arch.c @@ -8,49 +8,6 @@ =20 extern struct boot_params boot_params; =20 -static enum efi_secureboot_mode get_sb_mode(void) -{ - efi_guid_t efi_variable_guid =3D EFI_GLOBAL_VARIABLE_GUID; - efi_status_t status; - unsigned long size; - u8 secboot, setupmode; - - size =3D sizeof(secboot); - - if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) { - pr_info("ima: secureboot mode unknown, no efi\n"); - return efi_secureboot_mode_unknown; - } - - /* Get variable contents into buffer */ - status =3D efi.get_variable(L"SecureBoot", &efi_variable_guid, - NULL, &size, &secboot); - if (status =3D=3D EFI_NOT_FOUND) { - pr_info("ima: secureboot mode disabled\n"); - return efi_secureboot_mode_disabled; - } - - if (status !=3D EFI_SUCCESS) { - pr_info("ima: secureboot mode unknown\n"); - return efi_secureboot_mode_unknown; - } - - size =3D sizeof(setupmode); - status =3D efi.get_variable(L"SetupMode", &efi_variable_guid, - NULL, &size, &setupmode); - - if (status !=3D EFI_SUCCESS) /* ignore unknown SetupMode */ - setupmode =3D 0; - - if (secboot =3D=3D 0 || setupmode =3D=3D 1) { - pr_info("ima: secureboot mode disabled\n"); - return efi_secureboot_mode_disabled; - } - - pr_info("ima: secureboot mode enabled\n"); - return efi_secureboot_mode_enabled; -} - bool arch_ima_get_secureboot(void) { static enum efi_secureboot_mode sb_mode; @@ -60,7 +17,7 @@ bool arch_ima_get_secureboot(void) sb_mode =3D boot_params.secure_boot; =20 if (sb_mode =3D=3D efi_secureboot_mode_unset) - sb_mode =3D get_sb_mode(); + sb_mode =3D efi_get_secureboot_mode(); initialized =3D true; } =20 @@ -70,7 +27,7 @@ bool arch_ima_get_secureboot(void) return false; } =20 -/* secureboot arch rules */ +/* secure and trusted boot arch rules */ static const char * const sb_arch_rules[] =3D { #if !IS_ENABLED(CONFIG_KEXEC_SIG) "appraise func=3DKEXEC_KERNEL_CHECK appraise_type=3Dimasig", diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 5e5480a0a32d..68ffa6a069c0 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -1022,3 +1022,46 @@ static int __init register_update_efi_random_seed(vo= id) } late_initcall(register_update_efi_random_seed); #endif + +enum efi_secureboot_mode efi_get_secureboot_mode(void) +{ + efi_guid_t efi_variable_guid =3D EFI_GLOBAL_VARIABLE_GUID; + efi_status_t status; + unsigned long size; + u8 secboot, setupmode; + + size =3D sizeof(secboot); + + if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) { + pr_info("ima: secureboot mode unknown, no efi\n"); + return efi_secureboot_mode_unknown; + } + + /* Get variable contents into buffer */ + status =3D efi.get_variable(L"SecureBoot", &efi_variable_guid, + NULL, &size, &secboot); + if (status =3D=3D EFI_NOT_FOUND) { + pr_info("ima: secureboot mode disabled\n"); + return efi_secureboot_mode_disabled; + } + + if (status !=3D EFI_SUCCESS) { + pr_info("ima: secureboot mode unknown\n"); + return efi_secureboot_mode_unknown; + } + + size =3D sizeof(setupmode); + status =3D efi.get_variable(L"SetupMode", &efi_variable_guid, + NULL, &size, &setupmode); + + if (status !=3D EFI_SUCCESS) /* ignore unknown SetupMode */ + setupmode =3D 0; + + if (secboot =3D=3D 0 || setupmode =3D=3D 1) { + pr_info("ima: secureboot mode disabled\n"); + return efi_secureboot_mode_disabled; + } + + pr_info("ima: secureboot mode enabled\n"); + return efi_secureboot_mode_enabled; +} diff --git a/include/linux/efi.h b/include/linux/efi.h index d7c0e73af2b9..a73e5ae04672 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -1076,8 +1076,13 @@ static inline int efi_runtime_map_copy(void *buf, si= ze_t bufsz) =20 #ifdef CONFIG_EFI extern bool efi_runtime_disabled(void); +extern enum efi_secureboot_mode efi_get_secureboot_mode(void); #else static inline bool efi_runtime_disabled(void) { return true; } +static inline enum efi_secureboot_mode efi_get_secureboot_mode(void) +{ + return efi_secureboot_mode_disabled; +} #endif =20 extern void efi_call_virt_check_flags(unsigned long flags, const char *cal= l); --=20 2.26.1