102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_PAGE_64_DEFS_H
|
|
#define _ASM_X86_PAGE_64_DEFS_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/kaslr.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_KASAN
|
|
#define KASAN_STACK_ORDER 1
|
|
#else
|
|
#define KASAN_STACK_ORDER 0
|
|
#endif
|
|
|
|
#define THREAD_SIZE_ORDER (2 + KASAN_STACK_ORDER)
|
|
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
|
|
|
|
#define EXCEPTION_STACK_ORDER (1 + KASAN_STACK_ORDER)
|
|
#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
|
|
|
|
#define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER)
|
|
#define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER)
|
|
|
|
/*
|
|
* The index for the tss.ist[] array. The hardware limit is 7 entries.
|
|
*/
|
|
#define IST_INDEX_DF 0
|
|
#define IST_INDEX_NMI 1
|
|
#define IST_INDEX_DB 2
|
|
#define IST_INDEX_MCE 3
|
|
#define IST_INDEX_VC 4
|
|
|
|
/*
|
|
* Set __PAGE_OFFSET to the most negative possible address +
|
|
* PGDIR_SIZE*17 (pgd slot 273).
|
|
*
|
|
* The gap is to allow a space for LDT remap for PTI (1 pgd slot) and space for
|
|
* a hypervisor (16 slots). Choosing 16 slots for a hypervisor is arbitrary,
|
|
* but it's what Xen requires.
|
|
*/
|
|
#define __PAGE_OFFSET_BASE_L5 _AC(0xff11000000000000, UL)
|
|
#define __PAGE_OFFSET_BASE_L4 _AC(0xffff888000000000, UL)
|
|
|
|
#ifdef CONFIG_DYNAMIC_MEMORY_LAYOUT
|
|
#define __PAGE_OFFSET page_offset_base
|
|
#else
|
|
#define __PAGE_OFFSET __PAGE_OFFSET_BASE_L4
|
|
#endif /* CONFIG_DYNAMIC_MEMORY_LAYOUT */
|
|
|
|
#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
|
|
|
|
/* See Documentation/arch/x86/x86_64/mm.rst for a description of the memory map. */
|
|
|
|
#define __PHYSICAL_MASK_SHIFT 52
|
|
|
|
#ifdef CONFIG_X86_5LEVEL
|
|
#define __VIRTUAL_MASK_SHIFT (pgtable_l5_enabled() ? 56 : 47)
|
|
/* See task_size_max() in <asm/page_64.h> */
|
|
#else
|
|
#define __VIRTUAL_MASK_SHIFT 47
|
|
#define task_size_max() ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - PAGE_SIZE)
|
|
#endif
|
|
|
|
#define TASK_SIZE_MAX task_size_max()
|
|
#define DEFAULT_MAP_WINDOW ((1UL << 47) - PAGE_SIZE)
|
|
|
|
/* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's.
|
|
*/
|
|
#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
|
|
0xc0000000 : 0xFFFFe000)
|
|
|
|
#define TASK_SIZE_LOW (test_thread_flag(TIF_ADDR32) ? \
|
|
IA32_PAGE_OFFSET : DEFAULT_MAP_WINDOW)
|
|
#define TASK_SIZE (test_thread_flag(TIF_ADDR32) ? \
|
|
IA32_PAGE_OFFSET : TASK_SIZE_MAX)
|
|
#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_ADDR32)) ? \
|
|
IA32_PAGE_OFFSET : TASK_SIZE_MAX)
|
|
|
|
#define STACK_TOP TASK_SIZE_LOW
|
|
#define STACK_TOP_MAX TASK_SIZE_MAX
|
|
|
|
/*
|
|
* In spite of the name, KERNEL_IMAGE_SIZE is a limit on the maximum virtual
|
|
* address for the kernel image, rather than the limit on the size itself.
|
|
* This can be at most 1 GiB, due to the fixmap living in the next 1 GiB (see
|
|
* level2_kernel_pgt in arch/x86/kernel/head_64.S).
|
|
*
|
|
* On KASLR use 1 GiB by default, leaving 1 GiB for modules once the
|
|
* page tables are fully set up.
|
|
*
|
|
* If KASLR is disabled we can shrink it to 0.5 GiB and increase the size
|
|
* of the modules area to 1.5 GiB.
|
|
*/
|
|
#ifdef CONFIG_RANDOMIZE_BASE
|
|
#define KERNEL_IMAGE_SIZE (1024 * 1024 * 1024)
|
|
#else
|
|
#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
|
|
#endif
|
|
|
|
#endif /* _ASM_X86_PAGE_64_DEFS_H */
|