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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2025-05-16 15:33:05 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-05-17 10:38:16 +0200 |
| commit | 7212b58d6d7133e4cd3c2295e1fb54febe284156 (patch) | |
| tree | dd60adb01af78714287ed25cddce904865ad6533 /arch/x86/kernel/head64.c | |
| parent | cba5d9b3e99d6268d7909a65c2bd78f4d195aead (diff) | |
| download | linux-next-7212b58d6d7133e4cd3c2295e1fb54febe284156.tar.gz linux-next-7212b58d6d7133e4cd3c2295e1fb54febe284156.zip | |
x86/mm/64: Make 5-level paging support unconditional
Both Intel and AMD CPUs support 5-level paging, which is expected to
become more widely adopted in the future. All major x86 Linux
distributions have the feature enabled.
Remove CONFIG_X86_5LEVEL and related #ifdeffery for it to make it more readable.
Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250516123306.3812286-4-kirill.shutemov@linux.intel.com
Diffstat (limited to 'arch/x86/kernel/head64.c')
| -rw-r--r-- | arch/x86/kernel/head64.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 9f617be64fa9..533fcf5636fc 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -51,13 +51,11 @@ unsigned int __initdata next_early_pgt; SYM_PIC_ALIAS(next_early_pgt); pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX); -#ifdef CONFIG_X86_5LEVEL unsigned int __pgtable_l5_enabled __ro_after_init; unsigned int pgdir_shift __ro_after_init = 39; EXPORT_SYMBOL(pgdir_shift); unsigned int ptrs_per_p4d __ro_after_init = 1; EXPORT_SYMBOL(ptrs_per_p4d); -#endif unsigned long page_offset_base __ro_after_init = __PAGE_OFFSET_BASE_L4; EXPORT_SYMBOL(page_offset_base); |