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x86/efi: Implement arch_ima_efi_boot_mode() in source file

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The x86 implementation of arch_ima_efi_boot_mode() uses the global
boot_param state. Move it into a source file to clean up the header.
Avoid potential rebuilds of unrelated source files if boot_params
changes.

Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20240112095000.8952-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2024-01-12 10:44:38 +01:00 committed by Borislav Petkov (AMD)
parent 2afa7994f7
commit 785ddc8b6b
2 changed files with 8 additions and 2 deletions
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5
arch/x86/include/asm/efi.h
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@ -409,8 +409,9 @@ extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
void *buf, struct efi_mem_range *mem);
#define arch_ima_efi_boot_mode \
({ extern struct boot_params boot_params; boot_params.secure_boot; })
extern enum efi_secureboot_mode __x86_ima_efi_boot_mode(void);
#define arch_ima_efi_boot_mode __x86_ima_efi_boot_mode()
#ifdef CONFIG_EFI_RUNTIME_MAP
int efi_get_runtime_map_size(void);

5
arch/x86/platform/efi/efi.c
View File

@ -950,3 +950,8 @@ umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
}
return attr->mode;
}
enum efi_secureboot_mode __x86_ima_efi_boot_mode(void)
{
return boot_params.secure_boot;
}