From f27906b287403af53be26341cf86d73798f15fe8 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Thu, 28 Aug 2025 12:22:14 +0200 Subject: [PATCH] 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: Ard Biesheuvel Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/20250828102202.1849035-35-ardb+git@google.com --- arch/x86/kernel/head64.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 533fcf5636fc9..1bc40d0785ee3 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -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); -- 2.47.3