| /* 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 */ |