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efi: x86: Move EFI runtime map sysfs code to arch/x86

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The EFI runtime map code is only wired up on x86, which is the only
architecture that has a need for it in its implementation of kexec.

So let's move this code under arch/x86 and drop all references to it
from generic code. To ensure that the efi_runtime_map_init() is invoked
at the appropriate time use a 'sync' subsys_initcall() that will be
called right after the EFI initcall made from generic code where the
original invocation of efi_runtime_map_init() resided.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Dave Young <dyoung@redhat.com>
This commit is contained in:
Ard Biesheuvel
2022-11-07 09:17:16 +01:00
parent 8dfac4d8ad
commit 1fff234de2
8 changed files with 39 additions and 47 deletions
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28
include/linux/efi.h
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@@ -1089,34 +1089,6 @@ extern int efi_capsule_update(efi_capsule_header_t *capsule,
static inline bool efi_capsule_pending(int *reset_type) { return false; }
#endif
#ifdef CONFIG_EFI_RUNTIME_MAP
int efi_runtime_map_init(struct kobject *);
int efi_get_runtime_map_size(void);
int efi_get_runtime_map_desc_size(void);
int efi_runtime_map_copy(void *buf, size_t bufsz);
#else
static inline int efi_runtime_map_init(struct kobject *kobj)
{
return 0;
}
static inline int efi_get_runtime_map_size(void)
{
return 0;
}
static inline int efi_get_runtime_map_desc_size(void)
{
return 0;
}
static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
{
return 0;
}
#endif
#ifdef CONFIG_EFI
extern bool efi_runtime_disabled(void);
#else