1#ifndef _ASM_X86_PAGE_64_DEFS_H 2#define _ASM_X86_PAGE_64_DEFS_H 3 4#ifndef __ASSEMBLY__ 5#include <asm/kaslr.h> 6#endif 7 8#ifdef CONFIG_KASAN 9#define KASAN_STACK_ORDER 1 10#else 11#define KASAN_STACK_ORDER 0 12#endif 13 14#define THREAD_SIZE_ORDER (2 + KASAN_STACK_ORDER) 15#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 16#define CURRENT_MASK (~(THREAD_SIZE - 1)) 17 18#define EXCEPTION_STACK_ORDER (0 + KASAN_STACK_ORDER) 19#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) 20 21#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1) 22#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) 23 24#define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER) 25#define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER) 26 27#define DOUBLEFAULT_STACK 1 28#define NMI_STACK 2 29#define DEBUG_STACK 3 30#define MCE_STACK 4 31#define N_EXCEPTION_STACKS 4 /* hw limit: 7 */ 32 33/* 34 * Set __PAGE_OFFSET to the most negative possible address + 35 * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a 36 * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's 37 * what Xen requires. 38 */ 39#ifdef CONFIG_X86_5LEVEL 40#define __PAGE_OFFSET_BASE _AC(0xff10000000000000, UL) 41#else 42#define __PAGE_OFFSET_BASE _AC(0xffff880000000000, UL) 43#endif 44 45#ifdef CONFIG_RANDOMIZE_MEMORY 46#define __PAGE_OFFSET page_offset_base 47#else 48#define __PAGE_OFFSET __PAGE_OFFSET_BASE 49#endif /* CONFIG_RANDOMIZE_MEMORY */ 50 51#define __START_KERNEL_map _AC(0xffffffff80000000, UL) 52 53/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */ 54#ifdef CONFIG_X86_5LEVEL 55#define __PHYSICAL_MASK_SHIFT 52 56#define __VIRTUAL_MASK_SHIFT 56 57#else 58#define __PHYSICAL_MASK_SHIFT 46 59#define __VIRTUAL_MASK_SHIFT 47 60#endif 61 62/* 63 * Kernel image size is limited to 1GiB due to the fixmap living in the 64 * next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use 65 * 512MiB by default, leaving 1.5GiB for modules once the page tables 66 * are fully set up. If kernel ASLR is configured, it can extend the 67 * kernel page table mapping, reducing the size of the modules area. 68 */ 69#if defined(CONFIG_RANDOMIZE_BASE) 70#define KERNEL_IMAGE_SIZE (1024 * 1024 * 1024) 71#else 72#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) 73#endif 74 75#endif /* _ASM_X86_PAGE_64_DEFS_H */ 76