| commit | b83ce5ee91471d19c403ff91227204fb37c95fb2 | |
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | |
| Wed, 14 Feb 2018 11:16:48 +0000 (14 14:16 +0300) | ||
| committer | Ingo Molnar <mingo@kernel.org> | |
| Wed, 14 Feb 2018 12:11:13 +0000 (14 13:11 +0100) | ||
| tree | 530830b459b756cf431c27cc2000b43b58cdd558 | treesnapshot (tar.gz zip) |
| parent | 116fef6408599dd6ff6996235c50aa692e9b5631 | commitdiff |
x86/mm/64: Make __PHYSICAL_MASK_SHIFT always 52
__PHYSICAL_MASK_SHIFT is used to define the mask that helps to extract
physical address from a page table entry.
Although real physical address space available may differ between
machines, it's safe to use 52 as __PHYSICAL_MASK_SHIFT. Unused bits
above log2(MAXPHYADDR) up to bit 51 are reserved and must be 0.
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/20180214111656.88514-2-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
__PHYSICAL_MASK_SHIFT is used to define the mask that helps to extract
physical address from a page table entry.
Although real physical address space available may differ between
machines, it's safe to use 52 as __PHYSICAL_MASK_SHIFT. Unused bits
above log2(MAXPHYADDR) up to bit 51 are reserved and must be 0.
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/20180214111656.88514-2-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| arch/x86/include/asm/page_64_types.h | diffblobblamehistory |