151c78eb3SJeremy Fitzhardinge #ifndef _ASM_X86_PAGE_64_DEFS_H 251c78eb3SJeremy Fitzhardinge #define _ASM_X86_PAGE_64_DEFS_H 351c78eb3SJeremy Fitzhardinge 4c420f167SAndrey Ryabinin #ifdef CONFIG_KASAN 5c420f167SAndrey Ryabinin #define KASAN_STACK_ORDER 1 6c420f167SAndrey Ryabinin #else 7c420f167SAndrey Ryabinin #define KASAN_STACK_ORDER 0 8c420f167SAndrey Ryabinin #endif 9c420f167SAndrey Ryabinin 10c420f167SAndrey Ryabinin #define THREAD_SIZE_ORDER (2 + KASAN_STACK_ORDER) 1138e7c572SThomas Gleixner #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 1251c78eb3SJeremy Fitzhardinge #define CURRENT_MASK (~(THREAD_SIZE - 1)) 1351c78eb3SJeremy Fitzhardinge 14c420f167SAndrey Ryabinin #define EXCEPTION_STACK_ORDER (0 + KASAN_STACK_ORDER) 1551c78eb3SJeremy Fitzhardinge #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) 1651c78eb3SJeremy Fitzhardinge 1751c78eb3SJeremy Fitzhardinge #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1) 1851c78eb3SJeremy Fitzhardinge #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) 1951c78eb3SJeremy Fitzhardinge 20c420f167SAndrey Ryabinin #define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER) 2151c78eb3SJeremy Fitzhardinge #define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER) 2251c78eb3SJeremy Fitzhardinge 236f442be2SAndy Lutomirski #define DOUBLEFAULT_STACK 1 246f442be2SAndy Lutomirski #define NMI_STACK 2 256f442be2SAndy Lutomirski #define DEBUG_STACK 3 266f442be2SAndy Lutomirski #define MCE_STACK 4 276f442be2SAndy Lutomirski #define N_EXCEPTION_STACKS 4 /* hw limit: 7 */ 2851c78eb3SJeremy Fitzhardinge 2951c78eb3SJeremy Fitzhardinge /* 3051c78eb3SJeremy Fitzhardinge * Set __PAGE_OFFSET to the most negative possible address + 3151c78eb3SJeremy Fitzhardinge * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a 3251c78eb3SJeremy Fitzhardinge * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's 3351c78eb3SJeremy Fitzhardinge * what Xen requires. 3451c78eb3SJeremy Fitzhardinge */ 3551c78eb3SJeremy Fitzhardinge #define __PAGE_OFFSET _AC(0xffff880000000000, UL) 3651c78eb3SJeremy Fitzhardinge 3751c78eb3SJeremy Fitzhardinge #define __START_KERNEL_map _AC(0xffffffff80000000, UL) 3851c78eb3SJeremy Fitzhardinge 39c898faf9SRik van Riel /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */ 4051c78eb3SJeremy Fitzhardinge #define __PHYSICAL_MASK_SHIFT 46 419063c61fSLinus Torvalds #define __VIRTUAL_MASK_SHIFT 47 4251c78eb3SJeremy Fitzhardinge 4351c78eb3SJeremy Fitzhardinge /* 446145cfe3SKees Cook * Kernel image size is limited to 1GiB due to the fixmap living in the 456145cfe3SKees Cook * next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use 466145cfe3SKees Cook * 512MiB by default, leaving 1.5GiB for modules once the page tables 476145cfe3SKees Cook * are fully set up. If kernel ASLR is configured, it can extend the 486145cfe3SKees Cook * kernel page table mapping, reducing the size of the modules area. 4951c78eb3SJeremy Fitzhardinge */ 50e8581e3dSBaoquan He #if defined(CONFIG_RANDOMIZE_BASE) 51e8581e3dSBaoquan He #define KERNEL_IMAGE_SIZE (1024 * 1024 * 1024) 526145cfe3SKees Cook #else 53e8581e3dSBaoquan He #define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) 546145cfe3SKees Cook #endif 5551c78eb3SJeremy Fitzhardinge 5651c78eb3SJeremy Fitzhardinge #endif /* _ASM_X86_PAGE_64_DEFS_H */ 57