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