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efi: Move mem_attr_table out of struct efi

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The memory attributes table is only used at init time by the core EFI
code, so there is no need to carry its address in struct efi that is
shared with the world. So move it out, and make it __ro_after_init as
well, considering that the value is set during early boot.

Tested-by: Tony Luck <tony.luck@intel.com> # arch/ia64
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2020-01-22 15:05:12 +01:00
parent 5d288dbd88
commit a17e809ea5
4 changed files with 11 additions and 10 deletions
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3
include/linux/efi.h
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@ -539,7 +539,6 @@ extern struct efi {
unsigned long runtime; /* runtime table */
unsigned long config_table; /* config tables */
unsigned long esrt; /* ESRT table */
unsigned long mem_attr_table; /* memory attributes table */
unsigned long tpm_log; /* TPM2 Event Log table */
unsigned long tpm_final_log; /* TPM2 Final Events Log table */
unsigned long mem_reserve; /* Linux EFI memreserve table */
@ -641,6 +640,8 @@ extern void __init efi_fake_memmap(void);
static inline void efi_fake_memmap(void) { }
#endif
extern unsigned long efi_mem_attr_table;
/*
* efi_memattr_perm_setter - arch specific callback function passed into
* efi_memattr_apply_permissions() that updates the