1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 251c78eb3SJeremy Fitzhardinge #ifndef _ASM_X86_PAGE_64_DEFS_H 351c78eb3SJeremy Fitzhardinge #define _ASM_X86_PAGE_64_DEFS_H 451c78eb3SJeremy Fitzhardinge 5021182e5SThomas Garnier #ifndef __ASSEMBLY__ 6021182e5SThomas Garnier #include <asm/kaslr.h> 7021182e5SThomas Garnier #endif 8021182e5SThomas Garnier 9c420f167SAndrey Ryabinin #ifdef CONFIG_KASAN 10c420f167SAndrey Ryabinin #define KASAN_STACK_ORDER 1 11c420f167SAndrey Ryabinin #else 12c420f167SAndrey Ryabinin #define KASAN_STACK_ORDER 0 13c420f167SAndrey Ryabinin #endif 14c420f167SAndrey Ryabinin 15c420f167SAndrey Ryabinin #define THREAD_SIZE_ORDER (2 + KASAN_STACK_ORDER) 1638e7c572SThomas Gleixner #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 1751c78eb3SJeremy Fitzhardinge #define CURRENT_MASK (~(THREAD_SIZE - 1)) 1851c78eb3SJeremy Fitzhardinge 19c420f167SAndrey Ryabinin #define EXCEPTION_STACK_ORDER (0 + KASAN_STACK_ORDER) 2051c78eb3SJeremy Fitzhardinge #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) 2151c78eb3SJeremy Fitzhardinge 2251c78eb3SJeremy Fitzhardinge #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1) 2351c78eb3SJeremy Fitzhardinge #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) 2451c78eb3SJeremy Fitzhardinge 25c420f167SAndrey Ryabinin #define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER) 2651c78eb3SJeremy Fitzhardinge #define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER) 2751c78eb3SJeremy Fitzhardinge 286f442be2SAndy Lutomirski #define DOUBLEFAULT_STACK 1 296f442be2SAndy Lutomirski #define NMI_STACK 2 306f442be2SAndy Lutomirski #define DEBUG_STACK 3 316f442be2SAndy Lutomirski #define MCE_STACK 4 326f442be2SAndy Lutomirski #define N_EXCEPTION_STACKS 4 /* hw limit: 7 */ 3351c78eb3SJeremy Fitzhardinge 3451c78eb3SJeremy Fitzhardinge /* 3551c78eb3SJeremy Fitzhardinge * Set __PAGE_OFFSET to the most negative possible address + 3651c78eb3SJeremy Fitzhardinge * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a 3751c78eb3SJeremy Fitzhardinge * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's 3851c78eb3SJeremy Fitzhardinge * what Xen requires. 3951c78eb3SJeremy Fitzhardinge */ 404fa5662bSKirill A. Shutemov #define __PAGE_OFFSET_BASE_L5 _AC(0xff10000000000000, UL) 414fa5662bSKirill A. Shutemov #define __PAGE_OFFSET_BASE_L4 _AC(0xffff880000000000, UL) 424c7c4483SKirill A. Shutemov 43eedb92abSKirill A. Shutemov #ifdef CONFIG_DYNAMIC_MEMORY_LAYOUT 44021182e5SThomas Garnier #define __PAGE_OFFSET page_offset_base 45021182e5SThomas Garnier #else 464fa5662bSKirill A. Shutemov #define __PAGE_OFFSET __PAGE_OFFSET_BASE_L4 47eedb92abSKirill A. Shutemov #endif /* CONFIG_DYNAMIC_MEMORY_LAYOUT */ 4851c78eb3SJeremy Fitzhardinge 4951c78eb3SJeremy Fitzhardinge #define __START_KERNEL_map _AC(0xffffffff80000000, UL) 5051c78eb3SJeremy Fitzhardinge 51c898faf9SRik van Riel /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */ 52b83ce5eeSKirill A. Shutemov 534c7c4483SKirill A. Shutemov #define __PHYSICAL_MASK_SHIFT 52 54b83ce5eeSKirill A. Shutemov 55b83ce5eeSKirill A. Shutemov #ifdef CONFIG_X86_5LEVEL 5609e61a77SKirill A. Shutemov #define __VIRTUAL_MASK_SHIFT (pgtable_l5_enabled ? 56 : 47) 574c7c4483SKirill A. Shutemov #else 589063c61fSLinus Torvalds #define __VIRTUAL_MASK_SHIFT 47 594c7c4483SKirill A. Shutemov #endif 6051c78eb3SJeremy Fitzhardinge 6151c78eb3SJeremy Fitzhardinge /* 626145cfe3SKees Cook * Kernel image size is limited to 1GiB due to the fixmap living in the 636145cfe3SKees Cook * next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use 646145cfe3SKees Cook * 512MiB by default, leaving 1.5GiB for modules once the page tables 656145cfe3SKees Cook * are fully set up. If kernel ASLR is configured, it can extend the 666145cfe3SKees Cook * kernel page table mapping, reducing the size of the modules area. 6751c78eb3SJeremy Fitzhardinge */ 68e8581e3dSBaoquan He #if defined(CONFIG_RANDOMIZE_BASE) 69e8581e3dSBaoquan He #define KERNEL_IMAGE_SIZE (1024 * 1024 * 1024) 706145cfe3SKees Cook #else 71e8581e3dSBaoquan He #define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) 726145cfe3SKees Cook #endif 7351c78eb3SJeremy Fitzhardinge 7451c78eb3SJeremy Fitzhardinge #endif /* _ASM_X86_PAGE_64_DEFS_H */ 75