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efi: expose efivar generic ops register function

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This is a preparation for supporting efivar operations provided by other
than efi subsystem.  Both register and unregister functions are exposed
so that non-efi subsystem can revert the efi generic operation.

Acked-by: Sumit Garg <sumit.garg@linaro.org>
Co-developed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Masahisa Kojima 2023-11-07 14:40:52 +09:00 committed by Ard Biesheuvel
parent cdb46a8aef
commit 6bb3703aa5
2 changed files with 15 additions and 0 deletions
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12
drivers/firmware/efi/efi.c
View file

@ -231,6 +231,18 @@ static void generic_ops_unregister(void)
efivars_unregister(&generic_efivars);
}
void efivars_generic_ops_register(void)
{
generic_ops_register();
}
EXPORT_SYMBOL_GPL(efivars_generic_ops_register);
void efivars_generic_ops_unregister(void)
{
generic_ops_unregister();
}
EXPORT_SYMBOL_GPL(efivars_generic_ops_unregister);
#ifdef CONFIG_EFI_CUSTOM_SSDT_OVERLAYS
#define EFIVAR_SSDT_NAME_MAX 16UL
static char efivar_ssdt[EFIVAR_SSDT_NAME_MAX] __initdata;

3
include/linux/efi.h
View file

@ -1348,4 +1348,7 @@ bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n);
void efivars_generic_ops_register(void);
void efivars_generic_ops_unregister(void);
#endif /* _LINUX_EFI_H */