[mirror_ubuntu-bionic-kernel.git] / arch / x86 / include / asm / pgtable_types.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_HIDDEN	11	/* hidden by kmemcheck */
#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_SPLITTING	_PAGE_BIT_UNUSED1 /* only valid on a PSE pmd */
#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_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 _PAGE_SPLITTING	(_AT(pteval_t, 1) << _PAGE_BIT_SPLITTING)
#define __HAVE_ARCH_PTE_SPECIAL

#ifdef CONFIG_KMEMCHECK
#define _PAGE_HIDDEN	(_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
#else
#define _PAGE_HIDDEN	(_AT(pteval_t, 0))
#endif

/*
 * The same hidden bit is used by kmemcheck, but since kmemcheck
 * works on kernel pages while soft-dirty engine on user space,
 * they do not conflict with each other.
 */

#define _PAGE_BIT_SOFT_DIRTY	_PAGE_BIT_HIDDEN

#ifdef CONFIG_MEM_SOFT_DIRTY
#define _PAGE_SOFT_DIRTY	(_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY)
#else
#define _PAGE_SOFT_DIRTY	(_AT(pteval_t, 0))
#endif

/*
 * Tracking soft dirty bit when a page goes to a swap is tricky.
 * We need a bit which can be stored in pte _and_ not conflict
 * with swap entry format. On x86 bits 6 and 7 are *not* involved
 * into swap entry computation, but bit 6 is used for nonlinear
 * file mapping, so we borrow bit 7 for soft dirty tracking.
 *
 * Please note that this bit must be treated as swap dirty page
 * mark if and only if the PTE has present bit clear!
 */
#ifdef CONFIG_MEM_SOFT_DIRTY
#define _PAGE_SWP_SOFT_DIRTY	_PAGE_PSE
#else
#define _PAGE_SWP_SOFT_DIRTY	(_AT(pteval_t, 0))
#endif

#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)

/*
 * _PAGE_NUMA indicates that this page will trigger a numa hinting
 * minor page fault to gather numa placement statistics (see
 * pte_numa()). The bit picked (8) is within the range between
 * _PAGE_FILE (6) and _PAGE_PROTNONE (8) bits. Therefore, it doesn't
 * require changes to the swp entry format because that bit is always
 * zero when the pte is not present.
 *
 * The bit picked must be always zero when the pmd is present and not
 * present, so that we don't lose information when we set it while
 * atomically clearing the present bit.
 *
 * Because we shared the same bit (8) with _PAGE_PROTNONE this can be
 * interpreted as _PAGE_NUMA only in places that _PAGE_PROTNONE
 * couldn't reach, like handle_mm_fault() (see access_error in
 * arch/x86/mm/fault.c, the vma protection must not be PROT_NONE for
 * handle_mm_fault() to be invoked).
 */
#define _PAGE_NUMA	_PAGE_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 |	\
			 _PAGE_SOFT_DIRTY)
#define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)

#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_VVAR		(__PAGE_KERNEL_RO | _PAGE_USER)
#define __PAGE_KERNEL_VVAR_NOCACHE	(__PAGE_KERNEL_VVAR | _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_VVAR		__pgprot(__PAGE_KERNEL_VVAR)
#define PAGE_KERNEL_VVAR_NOCACHE	__pgprot(__PAGE_KERNEL_VVAR_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
#define PTE_IDENT_ATTR	 0x003		/* PRESENT+RW */
#define PDE_IDENT_ATTR	 0x063		/* PRESENT+RW+DIRTY+ACCESSED */
#define PGD_IDENT_ATTR	 0x001		/* PRESENT (no other attributes) */
#endif

#ifdef CONFIG_X86_32
# include <asm/pgtable_32_types.h>
#else
# include <asm/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 void set_nx(void);
extern int nx_enabled;

#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_init(void);
#else
#define native_pagetable_init        paging_init
#endif

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

enum pg_level {
	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);
extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
				    unsigned int *level);
extern phys_addr_t slow_virt_to_phys(void *__address);
extern int kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address,
				   unsigned numpages, unsigned long page_flags);
void kernel_unmap_pages_in_pgd(pgd_t *root, unsigned long address,
			       unsigned numpages);
#endif	/* !__ASSEMBLY__ */

#endif /* _ASM_X86_PGTABLE_DEFS_H */
Commit	Line	Data
8d19c99f JF	1	#ifndef _ASM_X86_PGTABLE_DEFS_H
	2	#define _ASM_X86_PGTABLE_DEFS_H
	3
	4	#include <linux/const.h>
e43623b4	5	#include <asm/page_types.h>
8d19c99f JF	6
	7	#define FIRST_USER_ADDRESS 0
	8
	9	#define _PAGE_BIT_PRESENT 0 /* is present */
	10	#define _PAGE_BIT_RW 1 /* writeable */
	11	#define _PAGE_BIT_USER 2 /* userspace addressable */
	12	#define _PAGE_BIT_PWT 3 /* page write through */
	13	#define _PAGE_BIT_PCD 4 /* page cache disabled */
	14	#define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
	15	#define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
	16	#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
	17	#define _PAGE_BIT_PAT 7 /* on 4KB pages */
	18	#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
	19	#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
	20	#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
dfec072e	21	#define _PAGE_BIT_HIDDEN 11 /* hidden by kmemcheck */
8d19c99f JF	22	#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
	23	#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
	24	#define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1
5f6e8da7	25	#define _PAGE_BIT_SPLITTING _PAGE_BIT_UNUSED1 /* only valid on a PSE pmd */
8d19c99f JF	26	#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
	27
	28	/* If _PAGE_BIT_PRESENT is clear, we use these: */
	29	/* - if the user mapped it with PROT_NONE; pte_present gives true */
	30	#define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
	31	/* - set: nonlinear file mapping, saved PTE; unset:swap */
	32	#define _PAGE_BIT_FILE _PAGE_BIT_DIRTY
	33
	34	#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
	35	#define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
	36	#define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
	37	#define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
	38	#define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
	39	#define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
	40	#define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
	41	#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
	42	#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
	43	#define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
	44	#define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
8d19c99f JF	45	#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
	46	#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
	47	#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
	48	#define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
5f6e8da7	49	#define _PAGE_SPLITTING (_AT(pteval_t, 1) << _PAGE_BIT_SPLITTING)
8d19c99f JF	50	#define __HAVE_ARCH_PTE_SPECIAL
8d19c99f JF	51
9d31c506 JF	52	#ifdef CONFIG_KMEMCHECK
	53	#define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
	54	#else
	55	#define _PAGE_HIDDEN (_AT(pteval_t, 0))
	56	#endif
	57
0f8975ec PE	58	/*
	59	* The same hidden bit is used by kmemcheck, but since kmemcheck
	60	* works on kernel pages while soft-dirty engine on user space,
	61	* they do not conflict with each other.
	62	*/
	63
41bb3476 CG	64	#define _PAGE_BIT_SOFT_DIRTY _PAGE_BIT_HIDDEN
41bb3476 CG	65
0f8975ec	66	#ifdef CONFIG_MEM_SOFT_DIRTY
41bb3476	67	#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY)
0f8975ec PE	68	#else
	69	#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 0))
	70	#endif
	71
179ef71c CG	72	/*
	73	* Tracking soft dirty bit when a page goes to a swap is tricky.
	74	* We need a bit which can be stored in pte _and_ not conflict
	75	* with swap entry format. On x86 bits 6 and 7 are not involved
	76	* into swap entry computation, but bit 6 is used for nonlinear
	77	* file mapping, so we borrow bit 7 for soft dirty tracking.
fa0f281c CG	78	*
	79	* Please note that this bit must be treated as swap dirty page
	80	* mark if and only if the PTE has present bit clear!
179ef71c CG	81	*/
	82	#ifdef CONFIG_MEM_SOFT_DIRTY
	83	#define _PAGE_SWP_SOFT_DIRTY _PAGE_PSE
	84	#else
	85	#define _PAGE_SWP_SOFT_DIRTY (_AT(pteval_t, 0))
	86	#endif
	87
8d19c99f JF	88	#if defined(CONFIG_X86_64) \|\| defined(CONFIG_X86_PAE)
	89	#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
	90	#else
	91	#define _PAGE_NX (_AT(pteval_t, 0))
	92	#endif
	93
	94	#define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
	95	#define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
	96
dbe4d203 AA	97	/*
	98	* _PAGE_NUMA indicates that this page will trigger a numa hinting
	99	* minor page fault to gather numa placement statistics (see
	100	* pte_numa()). The bit picked (8) is within the range between
	101	* _PAGE_FILE (6) and _PAGE_PROTNONE (8) bits. Therefore, it doesn't
	102	* require changes to the swp entry format because that bit is always
	103	* zero when the pte is not present.
	104	*
	105	* The bit picked must be always zero when the pmd is present and not
	106	* present, so that we don't lose information when we set it while
	107	* atomically clearing the present bit.
	108	*
	109	* Because we shared the same bit (8) with _PAGE_PROTNONE this can be
	110	* interpreted as _PAGE_NUMA only in places that _PAGE_PROTNONE
	111	* couldn't reach, like handle_mm_fault() (see access_error in
	112	* arch/x86/mm/fault.c, the vma protection must not be PROT_NONE for
	113	* handle_mm_fault() to be invoked).
	114	*/
	115	#define _PAGE_NUMA _PAGE_PROTNONE
	116
8d19c99f JF	117	#define _PAGE_TABLE (_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| \
	118	_PAGE_ACCESSED \| _PAGE_DIRTY)
	119	#define _KERNPG_TABLE (_PAGE_PRESENT \| _PAGE_RW \| _PAGE_ACCESSED \| \
	120	_PAGE_DIRTY)
	121
	122	/* Set of bits not changed in pte_modify */
	123	#define _PAGE_CHG_MASK (PTE_PFN_MASK \| _PAGE_PCD \| _PAGE_PWT \| \
24f91eba AV	124	_PAGE_SPECIAL \| _PAGE_ACCESSED \| _PAGE_DIRTY \| \
24f91eba AV	125	_PAGE_SOFT_DIRTY)
c489f125	126	#define _HPAGE_CHG_MASK (_PAGE_CHG_MASK \| _PAGE_PSE)
8d19c99f JF	127
	128	#define _PAGE_CACHE_MASK (_PAGE_PCD \| _PAGE_PWT)
	129	#define _PAGE_CACHE_WB (0)
	130	#define _PAGE_CACHE_WC (_PAGE_PWT)
	131	#define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
	132	#define _PAGE_CACHE_UC (_PAGE_PCD \| _PAGE_PWT)
	133
	134	#define PAGE_NONE __pgprot(_PAGE_PROTNONE \| _PAGE_ACCESSED)
	135	#define PAGE_SHARED __pgprot(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| \
	136	_PAGE_ACCESSED \| _PAGE_NX)
	137
	138	#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_RW \| \
	139	_PAGE_USER \| _PAGE_ACCESSED)
	140	#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| \
	141	_PAGE_ACCESSED \| _PAGE_NX)
	142	#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| \
	143	_PAGE_ACCESSED)
	144	#define PAGE_COPY PAGE_COPY_NOEXEC
	145	#define PAGE_READONLY __pgprot(_PAGE_PRESENT \| _PAGE_USER \| \
	146	_PAGE_ACCESSED \| _PAGE_NX)
	147	#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| \
	148	_PAGE_ACCESSED)
	149
	150	#define __PAGE_KERNEL_EXEC \
	151	(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_DIRTY \| _PAGE_ACCESSED \| _PAGE_GLOBAL)
	152	#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC \| _PAGE_NX)
	153
	154	#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
	155	#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
	156	#define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC \| _PAGE_PCD \| _PAGE_PWT)
	157	#define __PAGE_KERNEL_WC (__PAGE_KERNEL \| _PAGE_CACHE_WC)
	158	#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL \| _PAGE_PCD \| _PAGE_PWT)
	159	#define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL \| _PAGE_PCD)
	160	#define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX \| _PAGE_USER)
9fd67b4e	161	#define __PAGE_KERNEL_VVAR (__PAGE_KERNEL_RO \| _PAGE_USER)
d319bb79	162	#define __PAGE_KERNEL_VVAR_NOCACHE (__PAGE_KERNEL_VVAR \| _PAGE_PCD \| _PAGE_PWT)
8d19c99f JF	163	#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL \| _PAGE_PSE)
	164	#define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL \| _PAGE_CACHE_UC \| _PAGE_PSE)
	165	#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC \| _PAGE_PSE)
	166
	167	#define __PAGE_KERNEL_IO (__PAGE_KERNEL \| _PAGE_IOMAP)
	168	#define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE \| _PAGE_IOMAP)
	169	#define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS \| _PAGE_IOMAP)
	170	#define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC \| _PAGE_IOMAP)
	171
	172	#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
	173	#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
	174	#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
	175	#define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
	176	#define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC)
	177	#define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
	178	#define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS)
	179	#define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
	180	#define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
	181	#define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
	182	#define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
	183	#define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
9fd67b4e	184	#define PAGE_KERNEL_VVAR __pgprot(__PAGE_KERNEL_VVAR)
d319bb79	185	#define PAGE_KERNEL_VVAR_NOCACHE __pgprot(__PAGE_KERNEL_VVAR_NOCACHE)
8d19c99f JF	186
	187	#define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
	188	#define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
	189	#define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
	190	#define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
	191
	192	/* xwr */
	193	#define __P000 PAGE_NONE
	194	#define __P001 PAGE_READONLY
	195	#define __P010 PAGE_COPY
	196	#define __P011 PAGE_COPY
	197	#define __P100 PAGE_READONLY_EXEC
	198	#define __P101 PAGE_READONLY_EXEC
	199	#define __P110 PAGE_COPY_EXEC
	200	#define __P111 PAGE_COPY_EXEC
	201
	202	#define __S000 PAGE_NONE
	203	#define __S001 PAGE_READONLY
	204	#define __S010 PAGE_SHARED
	205	#define __S011 PAGE_SHARED
	206	#define __S100 PAGE_READONLY_EXEC
	207	#define __S101 PAGE_READONLY_EXEC
	208	#define __S110 PAGE_SHARED_EXEC
	209	#define __S111 PAGE_SHARED_EXEC
	210
	211	/*
	212	* early identity mapping pte attrib macros.
	213	*/
	214	#ifdef CONFIG_X86_64
	215	#define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
	216	#else
8d19c99f	217	#define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
7dda0387	218	#define PDE_IDENT_ATTR 0x063 /* PRESENT+RW+DIRTY+ACCESSED */
8d19c99f JF	219	#define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
	220	#endif
	221
54321d94	222	#ifdef CONFIG_X86_32
a1ce3928	223	# include <asm/pgtable_32_types.h>
54321d94	224	#else
a1ce3928	225	# include <asm/pgtable_64_types.h>
54321d94 JF	226	#endif
54321d94 JF	227
8d19c99f JF	228	#ifndef __ASSEMBLY__
8d19c99f JF	229
54321d94 JF	230	#include <linux/types.h>
54321d94 JF	231
9b3651cb JF	232	/* PTE_PFN_MASK extracts the PFN from a (pte\|pmd\|pud\|pgd)val_t */
	233	#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
	234
	235	/* PTE_FLAGS_MASK extracts the flags from a (pte\|pmd\|pud\|pgd)val_t */
	236	#define PTE_FLAGS_MASK (~PTE_PFN_MASK)
	237
54321d94 JF	238	typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
	239
	240	typedef struct { pgdval_t pgd; } pgd_t;
	241
	242	static inline pgd_t native_make_pgd(pgdval_t val)
	243	{
	244	return (pgd_t) { val };
	245	}
	246
	247	static inline pgdval_t native_pgd_val(pgd_t pgd)
	248	{
	249	return pgd.pgd;
	250	}
	251
	252	static inline pgdval_t pgd_flags(pgd_t pgd)
	253	{
	254	return native_pgd_val(pgd) & PTE_FLAGS_MASK;
	255	}
	256
	257	#if PAGETABLE_LEVELS > 3
	258	typedef struct { pudval_t pud; } pud_t;
	259
	260	static inline pud_t native_make_pud(pmdval_t val)
	261	{
	262	return (pud_t) { val };
	263	}
	264
	265	static inline pudval_t native_pud_val(pud_t pud)
	266	{
	267	return pud.pud;
	268	}
	269	#else
	270	#include <asm-generic/pgtable-nopud.h>
	271
	272	static inline pudval_t native_pud_val(pud_t pud)
	273	{
	274	return native_pgd_val(pud.pgd);
	275	}
	276	#endif
	277
	278	#if PAGETABLE_LEVELS > 2
	279	typedef struct { pmdval_t pmd; } pmd_t;
	280
	281	static inline pmd_t native_make_pmd(pmdval_t val)
	282	{
	283	return (pmd_t) { val };
	284	}
	285
	286	static inline pmdval_t native_pmd_val(pmd_t pmd)
	287	{
	288	return pmd.pmd;
	289	}
	290	#else
	291	#include <asm-generic/pgtable-nopmd.h>
	292
	293	static inline pmdval_t native_pmd_val(pmd_t pmd)
	294	{
	295	return native_pgd_val(pmd.pud.pgd);
	296	}
	297	#endif
	298
	299	static inline pudval_t pud_flags(pud_t pud)
	300	{
	301	return native_pud_val(pud) & PTE_FLAGS_MASK;
302	}
303
304	static inline pmdval_t pmd_flags(pmd_t pmd)
305	{
306	return native_pmd_val(pmd) & PTE_FLAGS_MASK;
307	}
308
309	static inline pte_t native_make_pte(pteval_t val)
310	{
311	return (pte_t) { .pte = val };
312	}
313
314	static inline pteval_t native_pte_val(pte_t pte)
315	{
316	return pte.pte;
317	}
318
319	static inline pteval_t pte_flags(pte_t pte)
320	{
321	return native_pte_val(pte) & PTE_FLAGS_MASK;
322	}
323
324	#define pgprot_val(x) ((x).pgprot)
325	#define __pgprot(x) ((pgprot_t) { (x) } )
326
327
328	typedef struct page *pgtable_t;
329
8d19c99f	330	extern pteval_t __supported_pte_mask;
c44c9ec0	331	extern void set_nx(void);
54321d94	332	extern int nx_enabled;
8d19c99f JF	333
	334	#define pgprot_writecombine pgprot_writecombine
	335	extern pgprot_t pgprot_writecombine(pgprot_t prot);
	336
	337	/* Indicate that x86 has its own track and untrack pfn vma functions */
	338	#define __HAVE_PFNMAP_TRACKING
	339
	340	#define __HAVE_PHYS_MEM_ACCESS_PROT
	341	struct file;
	342	pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
	343	unsigned long size, pgprot_t vma_prot);
	344	int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
	345	unsigned long size, pgprot_t *vma_prot);
	346
	347	/* Install a pte for a particular vaddr in kernel space. */
	348	void set_pte_vaddr(unsigned long vaddr, pte_t pte);
	349
	350	#ifdef CONFIG_X86_32
7737b215	351	extern void native_pagetable_init(void);
8d19c99f	352	#else
843b8ed2	353	#define native_pagetable_init paging_init
8d19c99f JF	354	#endif
	355
	356	struct seq_file;
	357	extern void arch_report_meminfo(struct seq_file *m);
	358
4cbeb51b	359	enum pg_level {
8d19c99f JF	360	PG_LEVEL_NONE,
	361	PG_LEVEL_4K,
	362	PG_LEVEL_2M,
	363	PG_LEVEL_1G,
	364	PG_LEVEL_NUM
	365	};
	366
	367	#ifdef CONFIG_PROC_FS
	368	extern void update_page_count(int level, unsigned long pages);
	369	#else
	370	static inline void update_page_count(int level, unsigned long pages) { }
	371	#endif
	372
	373	/*
	374	* Helper function that returns the kernel pagetable entry controlling
	375	* the virtual address 'address'. NULL means no pagetable entry present.
	376	* NOTE: the return type is pte_t but if the pmd is PSE then we return it
	377	* as a pte too.
	378	*/
	379	extern pte_t lookup_address(unsigned long address, unsigned int level);
426e34cc MF	380	extern pte_t lookup_address_in_pgd(pgd_t pgd, unsigned long address,
426e34cc MF	381	unsigned int *level);
d7656534	382	extern phys_addr_t slow_virt_to_phys(void *__address);
d2f7cbe7 BP	383	extern int kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address,
d2f7cbe7 BP	384	unsigned numpages, unsigned long page_flags);
42a54772 BP	385	void kernel_unmap_pages_in_pgd(pgd_t *root, unsigned long address,
42a54772 BP	386	unsigned numpages);
8d19c99f JF	387	#endif /* !__ASSEMBLY__ */
	388
	389	#endif /* _ASM_X86_PGTABLE_DEFS_H */