Commit f27906b2 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Borislav Petkov (AMD)
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x86/boot: Provide PIC aliases for 5-level paging related constants 



Provide PIC aliases for the global variables related to 5-level paging, so
that the startup code can access them in order to populate the kernel page
tables.

Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250828102202.1849035-35-ardb+git@google.com
parent 68a501d7

arch/x86/kernel/head64.c

+3 −0
Original line number Diff line number Diff line
@@ -52,10 +52,13 @@ SYM_PIC_ALIAS(next_early_pgt); 
pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX);



unsigned int __pgtable_l5_enabled __ro_after_init;

SYM_PIC_ALIAS(__pgtable_l5_enabled);

unsigned int pgdir_shift __ro_after_init = 39;

EXPORT_SYMBOL(pgdir_shift);

SYM_PIC_ALIAS(pgdir_shift);

unsigned int ptrs_per_p4d __ro_after_init = 1;

EXPORT_SYMBOL(ptrs_per_p4d);

SYM_PIC_ALIAS(ptrs_per_p4d);



unsigned long page_offset_base __ro_after_init = __PAGE_OFFSET_BASE_L4;

EXPORT_SYMBOL(page_offset_base);