80 lines
2.3 KiB
C
80 lines
2.3 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 CURRENT_MASK (~(THREAD_SIZE - 1))
|
|
|
|
#define EXCEPTION_STACK_ORDER (0 + KASAN_STACK_ORDER)
|
|
#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
|
|
|
|
#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
|
|
#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
|
|
|
|
#define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER)
|
|
#define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER)
|
|
|
|
#define DOUBLEFAULT_STACK 1
|
|
#define NMI_STACK 2
|
|
#define DEBUG_STACK 3
|
|
#define MCE_STACK 4
|
|
#define N_EXCEPTION_STACKS 4 /* hw limit: 7 */
|
|
|
|
/*
|
|
* 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/x86/x86_64/mm.txt 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)
|
|
#else
|
|
#define __VIRTUAL_MASK_SHIFT 47
|
|
#endif
|
|
|
|
/*
|
|
* Maximum kernel image size is limited to 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 */
|