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[RFT,v3,14/21] x86/boot: Provide PIC aliases for 5-level paging related constants

Message ID 20250512190834.332684-37-ardb+git@google.com
State New
Headers show
Series x86: strict separation of startup code | expand

Commit Message

Ard Biesheuvel May 12, 2025, 7:08 p.m. UTC 
From: Ard Biesheuvel <ardb@kernel.org>

For the time being, provide PIC aliases for the global variables related
to 5-level paging. Some or all of these are in the process of being
removed, but currently, they are still assigned by the startup code.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/x86/kernel/head64.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 510fb41f55fc..8c69cea84297 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -53,10 +53,13 @@  pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX);
 
 #ifdef CONFIG_X86_5LEVEL
 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);
 #endif
 
 #ifdef CONFIG_DYNAMIC_MEMORY_LAYOUT