~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/x86/include/asm/page_64_types.h

Version: ~ [ linux-6.1-rc7 ] ~ [ linux-6.0.10 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.80 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.156 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.225 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.267 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.300 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.334 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.302 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _ASM_X86_PAGE_64_DEFS_H
  3 #define _ASM_X86_PAGE_64_DEFS_H
  4 
  5 #ifndef __ASSEMBLY__
  6 #include <asm/kaslr.h>
  7 #endif
  8 
  9 #ifdef CONFIG_KASAN
 10 #define KASAN_STACK_ORDER 1
 11 #else
 12 #define KASAN_STACK_ORDER 0
 13 #endif
 14 
 15 #define THREAD_SIZE_ORDER       (2 + KASAN_STACK_ORDER)
 16 #define THREAD_SIZE  (PAGE_SIZE << THREAD_SIZE_ORDER)
 17 
 18 #define EXCEPTION_STACK_ORDER (1 + KASAN_STACK_ORDER)
 19 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
 20 
 21 #define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER)
 22 #define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER)
 23 
 24 /*
 25  * The index for the tss.ist[] array. The hardware limit is 7 entries.
 26  */
 27 #define IST_INDEX_DF            0
 28 #define IST_INDEX_NMI           1
 29 #define IST_INDEX_DB            2
 30 #define IST_INDEX_MCE           3
 31 #define IST_INDEX_VC            4
 32 
 33 /*
 34  * Set __PAGE_OFFSET to the most negative possible address +
 35  * PGDIR_SIZE*17 (pgd slot 273).
 36  *
 37  * The gap is to allow a space for LDT remap for PTI (1 pgd slot) and space for
 38  * a hypervisor (16 slots). Choosing 16 slots for a hypervisor is arbitrary,
 39  * but it's what Xen requires.
 40  */
 41 #define __PAGE_OFFSET_BASE_L5   _AC(0xff11000000000000, UL)
 42 #define __PAGE_OFFSET_BASE_L4   _AC(0xffff888000000000, UL)
 43 
 44 #ifdef CONFIG_DYNAMIC_MEMORY_LAYOUT
 45 #define __PAGE_OFFSET           page_offset_base
 46 #else
 47 #define __PAGE_OFFSET           __PAGE_OFFSET_BASE_L4
 48 #endif /* CONFIG_DYNAMIC_MEMORY_LAYOUT */
 49 
 50 #define __START_KERNEL_map      _AC(0xffffffff80000000, UL)
 51 
 52 /* See Documentation/x86/x86_64/mm.rst for a description of the memory map. */
 53 
 54 #define __PHYSICAL_MASK_SHIFT   52
 55 
 56 #ifdef CONFIG_X86_5LEVEL
 57 #define __VIRTUAL_MASK_SHIFT    (pgtable_l5_enabled() ? 56 : 47)
 58 /* See task_size_max() in <asm/page_64.h> */
 59 #else
 60 #define __VIRTUAL_MASK_SHIFT    47
 61 #define task_size_max()         ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - PAGE_SIZE)
 62 #endif
 63 
 64 #define TASK_SIZE_MAX           task_size_max()
 65 #define DEFAULT_MAP_WINDOW      ((1UL << 47) - PAGE_SIZE)
 66 
 67 /* This decides where the kernel will search for a free chunk of vm
 68  * space during mmap's.
 69  */
 70 #define IA32_PAGE_OFFSET        ((current->personality & ADDR_LIMIT_3GB) ? \
 71                                         0xc0000000 : 0xFFFFe000)
 72 
 73 #define TASK_SIZE_LOW           (test_thread_flag(TIF_ADDR32) ? \
 74                                         IA32_PAGE_OFFSET : DEFAULT_MAP_WINDOW)
 75 #define TASK_SIZE               (test_thread_flag(TIF_ADDR32) ? \
 76                                         IA32_PAGE_OFFSET : TASK_SIZE_MAX)
 77 #define TASK_SIZE_OF(child)     ((test_tsk_thread_flag(child, TIF_ADDR32)) ? \
 78                                         IA32_PAGE_OFFSET : TASK_SIZE_MAX)
 79 
 80 #define STACK_TOP               TASK_SIZE_LOW
 81 #define STACK_TOP_MAX           TASK_SIZE_MAX
 82 
 83 /*
 84  * In spite of the name, KERNEL_IMAGE_SIZE is a limit on the maximum virtual
 85  * address for the kernel image, rather than the limit on the size itself.
 86  * This can be at most 1 GiB, due to the fixmap living in the next 1 GiB (see
 87  * level2_kernel_pgt in arch/x86/kernel/head_64.S).
 88  *
 89  * On KASLR use 1 GiB by default, leaving 1 GiB for modules once the
 90  * page tables are fully set up.
 91  *
 92  * If KASLR is disabled we can shrink it to 0.5 GiB and increase the size
 93  * of the modules area to 1.5 GiB.
 94  */
 95 #ifdef CONFIG_RANDOMIZE_BASE
 96 #define KERNEL_IMAGE_SIZE       (1024 * 1024 * 1024)
 97 #else
 98 #define KERNEL_IMAGE_SIZE       (512 * 1024 * 1024)
 99 #endif
100 
101 #endif /* _ASM_X86_PAGE_64_DEFS_H */
102 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp