[mirror_ubuntu-artful-kernel.git] / arch / x86 / include / asm / page_64_types.h

#ifndef _ASM_X86_PAGE_64_DEFS_H
#define _ASM_X86_PAGE_64_DEFS_H

#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 */

#define PUD_PAGE_SIZE		(_AC(1, UL) << PUD_SHIFT)
#define PUD_PAGE_MASK		(~(PUD_PAGE_SIZE-1))

/*
 * Set __PAGE_OFFSET to the most negative possible address +
 * PGDIR_SIZE*16 (pgd slot 272).  The gap is to allow a space for a
 * hypervisor to fit.  Choosing 16 slots here is arbitrary, but it's
 * what Xen requires.
 */
#define __PAGE_OFFSET           _AC(0xffff880000000000, UL)

#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	46
#define __VIRTUAL_MASK_SHIFT	47

/*
 * Kernel image size is limited to 1GiB due to the fixmap living in the
 * next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use
 * 512MiB by default, leaving 1.5GiB for modules once the page tables
 * are fully set up. If kernel ASLR is configured, it can extend the
 * kernel page table mapping, reducing the size of the modules area.
 */
#define KERNEL_IMAGE_SIZE_DEFAULT      (512 * 1024 * 1024)
#if defined(CONFIG_RANDOMIZE_BASE) && \
	CONFIG_RANDOMIZE_BASE_MAX_OFFSET > KERNEL_IMAGE_SIZE_DEFAULT
#define KERNEL_IMAGE_SIZE   CONFIG_RANDOMIZE_BASE_MAX_OFFSET
#else
#define KERNEL_IMAGE_SIZE      KERNEL_IMAGE_SIZE_DEFAULT
#endif

#endif /* _ASM_X86_PAGE_64_DEFS_H */
Commit	Line	Data
51c78eb3 JF	1	#ifndef _ASM_X86_PAGE_64_DEFS_H
	2	#define _ASM_X86_PAGE_64_DEFS_H
	3
c420f167 AR	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)
38e7c572	11	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
51c78eb3 JF	12	#define CURRENT_MASK (~(THREAD_SIZE - 1))
51c78eb3 JF	13
c420f167	14	#define EXCEPTION_STACK_ORDER (0 + KASAN_STACK_ORDER)
51c78eb3 JF	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
c420f167	20	#define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER)
51c78eb3 JF	21	#define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER)
51c78eb3 JF	22
6f442be2 AL	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 */
51c78eb3 JF	28
	29	#define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
	30	#define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
	31
	32	/*
	33	* Set __PAGE_OFFSET to the most negative possible address +
	34	* PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a
	35	* hypervisor to fit. Choosing 16 slots here is arbitrary, but it's
	36	* what Xen requires.
	37	*/
	38	#define __PAGE_OFFSET _AC(0xffff880000000000, UL)
	39
51c78eb3 JF	40	#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
51c78eb3 JF	41
c898faf9	42	/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
51c78eb3	43	#define __PHYSICAL_MASK_SHIFT 46
9063c61f	44	#define __VIRTUAL_MASK_SHIFT 47
51c78eb3 JF	45
51c78eb3 JF	46	/*
6145cfe3 KC	47	* Kernel image size is limited to 1GiB due to the fixmap living in the
	48	* next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use
	49	* 512MiB by default, leaving 1.5GiB for modules once the page tables
	50	* are fully set up. If kernel ASLR is configured, it can extend the
	51	* kernel page table mapping, reducing the size of the modules area.
51c78eb3	52	*/
6145cfe3 KC	53	#define KERNEL_IMAGE_SIZE_DEFAULT (512 * 1024 * 1024)
	54	#if defined(CONFIG_RANDOMIZE_BASE) && \
	55	CONFIG_RANDOMIZE_BASE_MAX_OFFSET > KERNEL_IMAGE_SIZE_DEFAULT
	56	#define KERNEL_IMAGE_SIZE CONFIG_RANDOMIZE_BASE_MAX_OFFSET
	57	#else
	58	#define KERNEL_IMAGE_SIZE KERNEL_IMAGE_SIZE_DEFAULT
	59	#endif
51c78eb3	60
51c78eb3	61	#endif /* _ASM_X86_PAGE_64_DEFS_H */