/* SPDX-License-Identifier: GPL-2.0 */ #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 */Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Gleixner | 62 | 73.81% | 2 | 25.00% |
| Kirill A. Shutemov | 15 | 17.86% | 1 | 12.50% |
| H. Peter Anvin | 3 | 3.57% | 1 | 12.50% |
| Jack Steiner | 1 | 1.19% | 1 | 12.50% |
| Rik Van Riel | 1 | 1.19% | 1 | 12.50% |
| Greg Kroah-Hartman | 1 | 1.19% | 1 | 12.50% |
| Jeremy Fitzhardinge | 1 | 1.19% | 1 | 12.50% |
| Total | 84 | 100.00% | 8 | 100.00% |