mirror of
https://github.com/torvalds/linux.git
synced 2024-12-15 23:51:46 +00:00
4c7c44837b
The first part of memory map (up to %esp fixup) simply scales existing map for 4-level paging by factor of 9 -- number of bits addressed by the additional page table level. The rest of the map is unchanged. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20170330080731.65421-4-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
40 lines
999 B
C
40 lines
999 B
C
#ifndef _ASM_X86_SPARSEMEM_H
|
|
#define _ASM_X86_SPARSEMEM_H
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
/*
|
|
* generic non-linear memory support:
|
|
*
|
|
* 1) we will not split memory into more chunks than will fit into the flags
|
|
* field of the struct page
|
|
*
|
|
* SECTION_SIZE_BITS 2^n: size of each section
|
|
* MAX_PHYSADDR_BITS 2^n: max size of physical address space
|
|
* MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space
|
|
*
|
|
*/
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# ifdef CONFIG_X86_PAE
|
|
# define SECTION_SIZE_BITS 29
|
|
# define MAX_PHYSADDR_BITS 36
|
|
# define MAX_PHYSMEM_BITS 36
|
|
# else
|
|
# define SECTION_SIZE_BITS 26
|
|
# define MAX_PHYSADDR_BITS 32
|
|
# define MAX_PHYSMEM_BITS 32
|
|
# endif
|
|
#else /* CONFIG_X86_32 */
|
|
# define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */
|
|
# ifdef CONFIG_X86_5LEVEL
|
|
# define MAX_PHYSADDR_BITS 52
|
|
# define MAX_PHYSMEM_BITS 52
|
|
# else
|
|
# define MAX_PHYSADDR_BITS 44
|
|
# define MAX_PHYSMEM_BITS 46
|
|
# endif
|
|
#endif
|
|
|
|
#endif /* CONFIG_SPARSEMEM */
|
|
#endif /* _ASM_X86_SPARSEMEM_H */
|