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 #define __PAGE_OFFSET_BASE _AC(0xffff880000000000, UL) 40 #ifdef CONFIG_RANDOMIZE_MEMORY 41 #define __PAGE_OFFSET page_offset_base 42 #else 43 #define __PAGE_OFFSET __PAGE_OFFSET_BASE 44 #endif /* CONFIG_RANDOMIZE_MEMORY */ 45 46 #define __START_KERNEL_map _AC(0xffffffff80000000, UL) 47 48 /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */ 49 #define __PHYSICAL_MASK_SHIFT 46 50 #define __VIRTUAL_MASK_SHIFT 47 51 52 /* 53 * Kernel image size is limited to 1GiB due to the fixmap living in the 54 * next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use 55 * 512MiB by default, leaving 1.5GiB for modules once the page tables 56 * are fully set up. If kernel ASLR is configured, it can extend the 57 * kernel page table mapping, reducing the size of the modules area. 58 */ 59 #if defined(CONFIG_RANDOMIZE_BASE) 60 #define KERNEL_IMAGE_SIZE (1024 * 1024 * 1024) 61 #else 62 #define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) 63 #endif 64 65 #endif /* _ASM_X86_PAGE_64_DEFS_H */ 66