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author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2018-02-14 14:16:55 +0300 |
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committer | Ingo Molnar <mingo@kernel.org> | 2018-02-14 13:11:15 +0100 |
commit | 09e61a779e7f171c50325e6d7108a593afb2e5d4 (patch) | |
tree | b32c4f5ab83c696463e439910afa1d8657d61cc0 /arch/x86/include | |
parent | 162434e7f58b21f0b6c9cc5fb02222cd7d9064cc (diff) | |
download | op-kernel-dev-09e61a779e7f171c50325e6d7108a593afb2e5d4.zip op-kernel-dev-09e61a779e7f171c50325e6d7108a593afb2e5d4.tar.gz |
x86/mm: Make __VIRTUAL_MASK_SHIFT dynamic
For boot-time switching between paging modes, we need to be able to
adjust virtual mask shifts.
The change doesn't affect the kernel image size much:
text data bss dec hex filename
8628892 4734340 1368064 14731296 e0c820 vmlinux.before
8628966 4734340 1368064 14731370 e0c86a vmlinux.after
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20180214111656.88514-9-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include')
-rw-r--r-- | arch/x86/include/asm/page_64_types.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h index d54a3d5..fa7dc7c 100644 --- a/arch/x86/include/asm/page_64_types.h +++ b/arch/x86/include/asm/page_64_types.h @@ -56,7 +56,7 @@ #define __PHYSICAL_MASK_SHIFT 52 #ifdef CONFIG_X86_5LEVEL -#define __VIRTUAL_MASK_SHIFT 56 +#define __VIRTUAL_MASK_SHIFT (pgtable_l5_enabled ? 56 : 47) #else #define __VIRTUAL_MASK_SHIFT 47 #endif |