arch/x86/include/asm/pgtable_types.h - linux/kernel/git/bpf/bpf-next - Git at Google

 #ifndef _ASM_X86_PGTABLE_DEFS_H
 #define _ASM_X86_PGTABLE_DEFS_H

 #include <linux/const.h>
 #include <asm/page_types.h>

 #define FIRST_USER_ADDRESS	0

 #define _PAGE_BIT_PRESENT	0	/* is present */
 #define _PAGE_BIT_RW		1	/* writeable */
 #define _PAGE_BIT_USER		2	/* userspace addressable */
 #define _PAGE_BIT_PWT		3	/* page write through */
 #define _PAGE_BIT_PCD		4	/* page cache disabled */
 #define _PAGE_BIT_ACCESSED	5	/* was accessed (raised by CPU) */
 #define _PAGE_BIT_DIRTY		6	/* was written to (raised by CPU) */
 #define _PAGE_BIT_PSE		7	/* 4 MB (or 2MB) page */
 #define _PAGE_BIT_PAT		7	/* on 4KB pages */
 #define _PAGE_BIT_GLOBAL	8	/* Global TLB entry PPro+ */
 #define _PAGE_BIT_UNUSED1	9	/* available for programmer */
 #define _PAGE_BIT_IOMAP		10	/* flag used to indicate IO mapping */
 #define _PAGE_BIT_UNUSED3	11
 #define _PAGE_BIT_PAT_LARGE	12	/* On 2MB or 1GB pages */
 #define _PAGE_BIT_SPECIAL	_PAGE_BIT_UNUSED1
 #define _PAGE_BIT_CPA_TEST	_PAGE_BIT_UNUSED1
 #define _PAGE_BIT_NX           63       /* No execute: only valid after cpuid check */

 /* If _PAGE_BIT_PRESENT is clear, we use these: */
 /* - if the user mapped it with PROT_NONE; pte_present gives true */
 #define _PAGE_BIT_PROTNONE	_PAGE_BIT_GLOBAL
 /* - set: nonlinear file mapping, saved PTE; unset:swap */
 #define _PAGE_BIT_FILE		_PAGE_BIT_DIRTY

 #define _PAGE_PRESENT	(_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
 #define _PAGE_RW	(_AT(pteval_t, 1) << _PAGE_BIT_RW)
 #define _PAGE_USER	(_AT(pteval_t, 1) << _PAGE_BIT_USER)
 #define _PAGE_PWT	(_AT(pteval_t, 1) << _PAGE_BIT_PWT)
 #define _PAGE_PCD	(_AT(pteval_t, 1) << _PAGE_BIT_PCD)
 #define _PAGE_ACCESSED	(_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
 #define _PAGE_DIRTY	(_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
 #define _PAGE_PSE	(_AT(pteval_t, 1) << _PAGE_BIT_PSE)
 #define _PAGE_GLOBAL	(_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
 #define _PAGE_UNUSED1	(_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
 #define _PAGE_IOMAP	(_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
 #define _PAGE_UNUSED3	(_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
 #define _PAGE_PAT	(_AT(pteval_t, 1) << _PAGE_BIT_PAT)
 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
 #define _PAGE_SPECIAL	(_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
 #define _PAGE_CPA_TEST	(_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
 #define __HAVE_ARCH_PTE_SPECIAL

 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
 #define _PAGE_NX	(_AT(pteval_t, 1) << _PAGE_BIT_NX)
 #else
 #define _PAGE_NX	(_AT(pteval_t, 0))
 #endif

 #define _PAGE_FILE	(_AT(pteval_t, 1) << _PAGE_BIT_FILE)
 #define _PAGE_PROTNONE	(_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)

 #define _PAGE_TABLE	(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |	\
 			 _PAGE_ACCESSED | _PAGE_DIRTY)
 #define _KERNPG_TABLE	(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED |	\
 			 _PAGE_DIRTY)

 /* Set of bits not changed in pte_modify */
 #define _PAGE_CHG_MASK	(PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT |		\
 			 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)

 #define _PAGE_CACHE_MASK	(_PAGE_PCD | _PAGE_PWT)
 #define _PAGE_CACHE_WB		(0)
 #define _PAGE_CACHE_WC		(_PAGE_PWT)
 #define _PAGE_CACHE_UC_MINUS	(_PAGE_PCD)
 #define _PAGE_CACHE_UC		(_PAGE_PCD | _PAGE_PWT)

 #define PAGE_NONE	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
 #define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
 				 _PAGE_ACCESSED | _PAGE_NX)

 #define PAGE_SHARED_EXEC	__pgprot(_PAGE_PRESENT | _PAGE_RW |	\
 					 _PAGE_USER | _PAGE_ACCESSED)
 #define PAGE_COPY_NOEXEC	__pgprot(_PAGE_PRESENT | _PAGE_USER |	\
 					 _PAGE_ACCESSED | _PAGE_NX)
 #define PAGE_COPY_EXEC		__pgprot(_PAGE_PRESENT | _PAGE_USER |	\
 					 _PAGE_ACCESSED)
 #define PAGE_COPY		PAGE_COPY_NOEXEC
 #define PAGE_READONLY		__pgprot(_PAGE_PRESENT | _PAGE_USER |	\
 					 _PAGE_ACCESSED | _PAGE_NX)
 #define PAGE_READONLY_EXEC	__pgprot(_PAGE_PRESENT | _PAGE_USER |	\
 					 _PAGE_ACCESSED)

 #define __PAGE_KERNEL_EXEC						\
 	(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
 #define __PAGE_KERNEL		(__PAGE_KERNEL_EXEC | _PAGE_NX)

 #define __PAGE_KERNEL_RO		(__PAGE_KERNEL & ~_PAGE_RW)
 #define __PAGE_KERNEL_RX		(__PAGE_KERNEL_EXEC & ~_PAGE_RW)
 #define __PAGE_KERNEL_EXEC_NOCACHE	(__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
 #define __PAGE_KERNEL_WC		(__PAGE_KERNEL | _PAGE_CACHE_WC)
 #define __PAGE_KERNEL_NOCACHE		(__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
 #define __PAGE_KERNEL_UC_MINUS		(__PAGE_KERNEL | _PAGE_PCD)
 #define __PAGE_KERNEL_VSYSCALL		(__PAGE_KERNEL_RX | _PAGE_USER)
 #define __PAGE_KERNEL_VSYSCALL_NOCACHE	(__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
 #define __PAGE_KERNEL_LARGE		(__PAGE_KERNEL | _PAGE_PSE)
 #define __PAGE_KERNEL_LARGE_NOCACHE	(__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
 #define __PAGE_KERNEL_LARGE_EXEC	(__PAGE_KERNEL_EXEC | _PAGE_PSE)

 #define __PAGE_KERNEL_IO		(__PAGE_KERNEL | _PAGE_IOMAP)
 #define __PAGE_KERNEL_IO_NOCACHE	(__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
 #define __PAGE_KERNEL_IO_UC_MINUS	(__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
 #define __PAGE_KERNEL_IO_WC		(__PAGE_KERNEL_WC | _PAGE_IOMAP)

 #define PAGE_KERNEL			__pgprot(__PAGE_KERNEL)
 #define PAGE_KERNEL_RO			__pgprot(__PAGE_KERNEL_RO)
 #define PAGE_KERNEL_EXEC		__pgprot(__PAGE_KERNEL_EXEC)
 #define PAGE_KERNEL_RX			__pgprot(__PAGE_KERNEL_RX)
 #define PAGE_KERNEL_WC			__pgprot(__PAGE_KERNEL_WC)
 #define PAGE_KERNEL_NOCACHE		__pgprot(__PAGE_KERNEL_NOCACHE)
 #define PAGE_KERNEL_UC_MINUS		__pgprot(__PAGE_KERNEL_UC_MINUS)
 #define PAGE_KERNEL_EXEC_NOCACHE	__pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
 #define PAGE_KERNEL_LARGE		__pgprot(__PAGE_KERNEL_LARGE)
 #define PAGE_KERNEL_LARGE_NOCACHE	__pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
 #define PAGE_KERNEL_LARGE_EXEC		__pgprot(__PAGE_KERNEL_LARGE_EXEC)
 #define PAGE_KERNEL_VSYSCALL		__pgprot(__PAGE_KERNEL_VSYSCALL)
 #define PAGE_KERNEL_VSYSCALL_NOCACHE	__pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)

 #define PAGE_KERNEL_IO			__pgprot(__PAGE_KERNEL_IO)
 #define PAGE_KERNEL_IO_NOCACHE		__pgprot(__PAGE_KERNEL_IO_NOCACHE)
 #define PAGE_KERNEL_IO_UC_MINUS		__pgprot(__PAGE_KERNEL_IO_UC_MINUS)
 #define PAGE_KERNEL_IO_WC		__pgprot(__PAGE_KERNEL_IO_WC)

 /*         xwr */
 #define __P000	PAGE_NONE
 #define __P001	PAGE_READONLY
 #define __P010	PAGE_COPY
 #define __P011	PAGE_COPY
 #define __P100	PAGE_READONLY_EXEC
 #define __P101	PAGE_READONLY_EXEC
 #define __P110	PAGE_COPY_EXEC
 #define __P111	PAGE_COPY_EXEC

 #define __S000	PAGE_NONE
 #define __S001	PAGE_READONLY
 #define __S010	PAGE_SHARED
 #define __S011	PAGE_SHARED
 #define __S100	PAGE_READONLY_EXEC
 #define __S101	PAGE_READONLY_EXEC
 #define __S110	PAGE_SHARED_EXEC
 #define __S111	PAGE_SHARED_EXEC

 /*
  * early identity mapping  pte attrib macros.
  */
 #ifdef CONFIG_X86_64
 #define __PAGE_KERNEL_IDENT_LARGE_EXEC	__PAGE_KERNEL_LARGE_EXEC
 #else
 /*
  * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
  * bits are combined, this will alow user to access the high address mapped
  * VDSO in the presence of CONFIG_COMPAT_VDSO
  */
 #define PTE_IDENT_ATTR	 0x003		/* PRESENT+RW */
 #define PDE_IDENT_ATTR	 0x067		/* PRESENT+RW+USER+DIRTY+ACCESSED */
 #define PGD_IDENT_ATTR	 0x001		/* PRESENT (no other attributes) */
 #endif

 #ifdef CONFIG_X86_32
 # include "pgtable_32_types.h"
 #else
 # include "pgtable_64_types.h"
 #endif

 #ifndef __ASSEMBLY__

 #include <linux/types.h>

 /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
 #define PTE_PFN_MASK		((pteval_t)PHYSICAL_PAGE_MASK)

 /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
 #define PTE_FLAGS_MASK		(~PTE_PFN_MASK)

 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;

 typedef struct { pgdval_t pgd; } pgd_t;

 static inline pgd_t native_make_pgd(pgdval_t val)
 {
 	return (pgd_t) { val };
 }

 static inline pgdval_t native_pgd_val(pgd_t pgd)
 {
 	return pgd.pgd;
 }

 static inline pgdval_t pgd_flags(pgd_t pgd)
 {
 	return native_pgd_val(pgd) & PTE_FLAGS_MASK;
 }

 #if PAGETABLE_LEVELS > 3
 typedef struct { pudval_t pud; } pud_t;

 static inline pud_t native_make_pud(pmdval_t val)
 {
 	return (pud_t) { val };
 }

 static inline pudval_t native_pud_val(pud_t pud)
 {
 	return pud.pud;
 }
 #else
 #include <asm-generic/pgtable-nopud.h>

 static inline pudval_t native_pud_val(pud_t pud)
 {
 	return native_pgd_val(pud.pgd);
 }
 #endif

 #if PAGETABLE_LEVELS > 2
 typedef struct { pmdval_t pmd; } pmd_t;

 static inline pmd_t native_make_pmd(pmdval_t val)
 {
 	return (pmd_t) { val };
 }

 static inline pmdval_t native_pmd_val(pmd_t pmd)
 {
 	return pmd.pmd;
 }
 #else
 #include <asm-generic/pgtable-nopmd.h>

 static inline pmdval_t native_pmd_val(pmd_t pmd)
 {
 	return native_pgd_val(pmd.pud.pgd);
 }
 #endif

 static inline pudval_t pud_flags(pud_t pud)
 {
 	return native_pud_val(pud) & PTE_FLAGS_MASK;
 }

 static inline pmdval_t pmd_flags(pmd_t pmd)
 {
 	return native_pmd_val(pmd) & PTE_FLAGS_MASK;
 }

 static inline pte_t native_make_pte(pteval_t val)
 {
 	return (pte_t) { .pte = val };
 }

 static inline pteval_t native_pte_val(pte_t pte)
 {
 	return pte.pte;
 }

 static inline pteval_t pte_flags(pte_t pte)
 {
 	return native_pte_val(pte) & PTE_FLAGS_MASK;
 }

 #define pgprot_val(x)	((x).pgprot)
 #define __pgprot(x)	((pgprot_t) { (x) } )


 typedef struct page *pgtable_t;

 extern pteval_t __supported_pte_mask;
 extern int nx_enabled;
 extern void set_nx(void);

 #define pgprot_writecombine	pgprot_writecombine
 extern pgprot_t pgprot_writecombine(pgprot_t prot);

 /* Indicate that x86 has its own track and untrack pfn vma functions */
 #define __HAVE_PFNMAP_TRACKING

 #define __HAVE_PHYS_MEM_ACCESS_PROT
 struct file;
 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
                               unsigned long size, pgprot_t vma_prot);
 int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
                               unsigned long size, pgprot_t *vma_prot);

 /* Install a pte for a particular vaddr in kernel space. */
 void set_pte_vaddr(unsigned long vaddr, pte_t pte);

 #ifdef CONFIG_X86_32
 extern void native_pagetable_setup_start(pgd_t *base);
 extern void native_pagetable_setup_done(pgd_t *base);
 #else
 static inline void native_pagetable_setup_start(pgd_t *base) {}
 static inline void native_pagetable_setup_done(pgd_t *base) {}
 #endif

 struct seq_file;
 extern void arch_report_meminfo(struct seq_file *m);

 enum {
 	PG_LEVEL_NONE,
 	PG_LEVEL_4K,
 	PG_LEVEL_2M,
 	PG_LEVEL_1G,
 	PG_LEVEL_NUM
 };

 #ifdef CONFIG_PROC_FS
 extern void update_page_count(int level, unsigned long pages);
 #else
 static inline void update_page_count(int level, unsigned long pages) { }
 #endif

 /*
  * Helper function that returns the kernel pagetable entry controlling
  * the virtual address 'address'. NULL means no pagetable entry present.
  * NOTE: the return type is pte_t but if the pmd is PSE then we return it
  * as a pte too.
  */
 extern pte_t *lookup_address(unsigned long address, unsigned int *level);

 #endif	/* !__ASSEMBLY__ */

 #endif /* _ASM_X86_PGTABLE_DEFS_H */
	#ifndef _ASM_X86_PGTABLE_DEFS_H
	#define _ASM_X86_PGTABLE_DEFS_H

	#include <linux/const.h>
	#include <asm/page_types.h>

	#define FIRST_USER_ADDRESS 0

	#define _PAGE_BIT_PRESENT 0 /* is present */
	#define _PAGE_BIT_RW 1 /* writeable */
	#define _PAGE_BIT_USER 2 /* userspace addressable */
	#define _PAGE_BIT_PWT 3 /* page write through */
	#define _PAGE_BIT_PCD 4 /* page cache disabled */
	#define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
	#define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
	#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
	#define _PAGE_BIT_PAT 7 /* on 4KB pages */
	#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
	#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
	#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
	#define _PAGE_BIT_UNUSED3 11
	#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
	#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
	#define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1
	#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */

	/* If _PAGE_BIT_PRESENT is clear, we use these: */
	/* - if the user mapped it with PROT_NONE; pte_present gives true */
	#define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
	/* - set: nonlinear file mapping, saved PTE; unset:swap */
	#define _PAGE_BIT_FILE _PAGE_BIT_DIRTY

	#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
	#define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
	#define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
	#define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
	#define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
	#define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
	#define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
	#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
	#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
	#define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
	#define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
	#define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
	#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
	#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
	#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
	#define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
	#define __HAVE_ARCH_PTE_SPECIAL

	#if defined(CONFIG_X86_64) \|\| defined(CONFIG_X86_PAE)
	#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
	#else
	#define _PAGE_NX (_AT(pteval_t, 0))
	#endif

	#define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
	#define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)

	#define _PAGE_TABLE (_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| \
	_PAGE_ACCESSED \| _PAGE_DIRTY)
	#define _KERNPG_TABLE (_PAGE_PRESENT \| _PAGE_RW \| _PAGE_ACCESSED \| \
	_PAGE_DIRTY)

	/* Set of bits not changed in pte_modify */
	#define _PAGE_CHG_MASK (PTE_PFN_MASK \| _PAGE_PCD \| _PAGE_PWT \| \
	_PAGE_SPECIAL \| _PAGE_ACCESSED \| _PAGE_DIRTY)

	#define _PAGE_CACHE_MASK (_PAGE_PCD \| _PAGE_PWT)
	#define _PAGE_CACHE_WB (0)
	#define _PAGE_CACHE_WC (_PAGE_PWT)
	#define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
	#define _PAGE_CACHE_UC (_PAGE_PCD \| _PAGE_PWT)

	#define PAGE_NONE __pgprot(_PAGE_PROTNONE \| _PAGE_ACCESSED)
	#define PAGE_SHARED __pgprot(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| \
	_PAGE_ACCESSED \| _PAGE_NX)

	#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_RW \| \
	_PAGE_USER \| _PAGE_ACCESSED)
	#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| \
	_PAGE_ACCESSED \| _PAGE_NX)
	#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| \
	_PAGE_ACCESSED)
	#define PAGE_COPY PAGE_COPY_NOEXEC
	#define PAGE_READONLY __pgprot(_PAGE_PRESENT \| _PAGE_USER \| \
	_PAGE_ACCESSED \| _PAGE_NX)
	#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| \
	_PAGE_ACCESSED)

	#define __PAGE_KERNEL_EXEC \
	(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_DIRTY \| _PAGE_ACCESSED \| _PAGE_GLOBAL)
	#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC \| _PAGE_NX)

	#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
	#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
	#define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC \| _PAGE_PCD \| _PAGE_PWT)
	#define __PAGE_KERNEL_WC (__PAGE_KERNEL \| _PAGE_CACHE_WC)
	#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL \| _PAGE_PCD \| _PAGE_PWT)
	#define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL \| _PAGE_PCD)
	#define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX \| _PAGE_USER)
	#define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL \| _PAGE_PCD \| _PAGE_PWT)
	#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL \| _PAGE_PSE)
	#define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL \| _PAGE_CACHE_UC \| _PAGE_PSE)
	#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC \| _PAGE_PSE)

	#define __PAGE_KERNEL_IO (__PAGE_KERNEL \| _PAGE_IOMAP)
	#define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE \| _PAGE_IOMAP)
	#define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS \| _PAGE_IOMAP)
	#define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC \| _PAGE_IOMAP)

	#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
	#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
	#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
	#define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
	#define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC)
	#define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
	#define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS)
	#define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
	#define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
	#define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
	#define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
	#define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
	#define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)

	#define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
	#define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
	#define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
	#define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)

	/* xwr */
	#define __P000 PAGE_NONE
	#define __P001 PAGE_READONLY
	#define __P010 PAGE_COPY
	#define __P011 PAGE_COPY
	#define __P100 PAGE_READONLY_EXEC
	#define __P101 PAGE_READONLY_EXEC
	#define __P110 PAGE_COPY_EXEC
	#define __P111 PAGE_COPY_EXEC

	#define __S000 PAGE_NONE
	#define __S001 PAGE_READONLY
	#define __S010 PAGE_SHARED
	#define __S011 PAGE_SHARED
	#define __S100 PAGE_READONLY_EXEC
	#define __S101 PAGE_READONLY_EXEC
	#define __S110 PAGE_SHARED_EXEC
	#define __S111 PAGE_SHARED_EXEC

	/*
	* early identity mapping pte attrib macros.
	*/
	#ifdef CONFIG_X86_64
	#define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
	#else
	/*
	* For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
	* bits are combined, this will alow user to access the high address mapped
	* VDSO in the presence of CONFIG_COMPAT_VDSO
	*/
	#define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
	#define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */
	#define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
	#endif

	#ifdef CONFIG_X86_32
	# include "pgtable_32_types.h"
	#else
	# include "pgtable_64_types.h"
	#endif

	#ifndef __ASSEMBLY__

	#include <linux/types.h>

	/* PTE_PFN_MASK extracts the PFN from a (pte\|pmd\|pud\|pgd)val_t */
	#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)

	/* PTE_FLAGS_MASK extracts the flags from a (pte\|pmd\|pud\|pgd)val_t */
	#define PTE_FLAGS_MASK (~PTE_PFN_MASK)

	typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;

	typedef struct { pgdval_t pgd; } pgd_t;

	static inline pgd_t native_make_pgd(pgdval_t val)
	{
	return (pgd_t) { val };
	}

	static inline pgdval_t native_pgd_val(pgd_t pgd)
	{
	return pgd.pgd;
	}

	static inline pgdval_t pgd_flags(pgd_t pgd)
	{
	return native_pgd_val(pgd) & PTE_FLAGS_MASK;
	}

	#if PAGETABLE_LEVELS > 3
	typedef struct { pudval_t pud; } pud_t;

	static inline pud_t native_make_pud(pmdval_t val)
	{
	return (pud_t) { val };
	}

	static inline pudval_t native_pud_val(pud_t pud)
	{
	return pud.pud;
	}
	#else
	#include <asm-generic/pgtable-nopud.h>

	static inline pudval_t native_pud_val(pud_t pud)
	{
	return native_pgd_val(pud.pgd);
	}
	#endif

	#if PAGETABLE_LEVELS > 2
	typedef struct { pmdval_t pmd; } pmd_t;

	static inline pmd_t native_make_pmd(pmdval_t val)
	{
	return (pmd_t) { val };
	}

	static inline pmdval_t native_pmd_val(pmd_t pmd)
	{
	return pmd.pmd;
	}
	#else
	#include <asm-generic/pgtable-nopmd.h>

	static inline pmdval_t native_pmd_val(pmd_t pmd)
	{
	return native_pgd_val(pmd.pud.pgd);
	}
	#endif

	static inline pudval_t pud_flags(pud_t pud)
	{
	return native_pud_val(pud) & PTE_FLAGS_MASK;
	}

	static inline pmdval_t pmd_flags(pmd_t pmd)
	{
	return native_pmd_val(pmd) & PTE_FLAGS_MASK;
	}

	static inline pte_t native_make_pte(pteval_t val)
	{
	return (pte_t) { .pte = val };
	}

	static inline pteval_t native_pte_val(pte_t pte)
	{
	return pte.pte;
	}

	static inline pteval_t pte_flags(pte_t pte)
	{
	return native_pte_val(pte) & PTE_FLAGS_MASK;
	}

	#define pgprot_val(x) ((x).pgprot)
	#define __pgprot(x) ((pgprot_t) { (x) } )


	typedef struct page *pgtable_t;

	extern pteval_t __supported_pte_mask;
	extern int nx_enabled;
	extern void set_nx(void);

	#define pgprot_writecombine pgprot_writecombine
	extern pgprot_t pgprot_writecombine(pgprot_t prot);

	/* Indicate that x86 has its own track and untrack pfn vma functions */
	#define __HAVE_PFNMAP_TRACKING

	#define __HAVE_PHYS_MEM_ACCESS_PROT
	struct file;
	pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
	unsigned long size, pgprot_t vma_prot);
	int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
	unsigned long size, pgprot_t *vma_prot);

	/* Install a pte for a particular vaddr in kernel space. */
	void set_pte_vaddr(unsigned long vaddr, pte_t pte);

	#ifdef CONFIG_X86_32
	extern void native_pagetable_setup_start(pgd_t *base);
	extern void native_pagetable_setup_done(pgd_t *base);
	#else
	static inline void native_pagetable_setup_start(pgd_t *base) {}
	static inline void native_pagetable_setup_done(pgd_t *base) {}
	#endif

	struct seq_file;
	extern void arch_report_meminfo(struct seq_file *m);

	enum {
	PG_LEVEL_NONE,
	PG_LEVEL_4K,
	PG_LEVEL_2M,
	PG_LEVEL_1G,
	PG_LEVEL_NUM
	};

	#ifdef CONFIG_PROC_FS
	extern void update_page_count(int level, unsigned long pages);
	#else
	static inline void update_page_count(int level, unsigned long pages) { }
	#endif

	/*
	* Helper function that returns the kernel pagetable entry controlling
	* the virtual address 'address'. NULL means no pagetable entry present.
	* NOTE: the return type is pte_t but if the pmd is PSE then we return it
	* as a pte too.
	*/
	extern pte_t lookup_address(unsigned long address, unsigned int level);

	#endif /* !__ASSEMBLY__ */

	#endif /* _ASM_X86_PGTABLE_DEFS_H */