[mirror_ubuntu-zesty-kernel.git] / arch / x86 / include / asm / xen / page.h

#ifndef _ASM_X86_XEN_PAGE_H
#define _ASM_X86_XEN_PAGE_H

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/pfn.h>
#include <linux/mm.h>

#include <linux/uaccess.h>
#include <asm/page.h>
#include <asm/pgtable.h>

#include <xen/interface/xen.h>
#include <xen/interface/grant_table.h>
#include <xen/features.h>

/* Xen machine address */
typedef struct xmaddr {
	phys_addr_t maddr;
} xmaddr_t;

/* Xen pseudo-physical address */
typedef struct xpaddr {
	phys_addr_t paddr;
} xpaddr_t;

#define XMADDR(x)	((xmaddr_t) { .maddr = (x) })
#define XPADDR(x)	((xpaddr_t) { .paddr = (x) })

/**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/
#define INVALID_P2M_ENTRY	(~0UL)
#define FOREIGN_FRAME_BIT	(1UL<<(BITS_PER_LONG-1))
#define IDENTITY_FRAME_BIT	(1UL<<(BITS_PER_LONG-2))
#define FOREIGN_FRAME(m)	((m) | FOREIGN_FRAME_BIT)
#define IDENTITY_FRAME(m)	((m) | IDENTITY_FRAME_BIT)

#define P2M_PER_PAGE		(PAGE_SIZE / sizeof(unsigned long))

extern unsigned long *machine_to_phys_mapping;
extern unsigned long  machine_to_phys_nr;
extern unsigned long *xen_p2m_addr;
extern unsigned long  xen_p2m_size;
extern unsigned long  xen_max_p2m_pfn;

extern int xen_alloc_p2m_entry(unsigned long pfn);

extern unsigned long get_phys_to_machine(unsigned long pfn);
extern bool set_phys_to_machine(unsigned long pfn, unsigned long mfn);
extern bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
extern unsigned long __init set_phys_range_identity(unsigned long pfn_s,
						    unsigned long pfn_e);

extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
				   struct gnttab_map_grant_ref *kmap_ops,
				   struct page **pages, unsigned int count);
extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
				     struct gnttab_unmap_grant_ref *kunmap_ops,
				     struct page **pages, unsigned int count);

/*
 * Helper functions to write or read unsigned long values to/from
 * memory, when the access may fault.
 */
static inline int xen_safe_write_ulong(unsigned long *addr, unsigned long val)
{
	return __put_user(val, (unsigned long __user *)addr);
}

static inline int xen_safe_read_ulong(unsigned long *addr, unsigned long *val)
{
	return __get_user(*val, (unsigned long __user *)addr);
}

/*
 * When to use pfn_to_mfn(), __pfn_to_mfn() or get_phys_to_machine():
 * - pfn_to_mfn() returns either INVALID_P2M_ENTRY or the mfn. No indicator
 *   bits (identity or foreign) are set.
 * - __pfn_to_mfn() returns the found entry of the p2m table. A possibly set
 *   identity or foreign indicator will be still set. __pfn_to_mfn() is
 *   encapsulating get_phys_to_machine() which is called in special cases only.
 * - get_phys_to_machine() is to be called by __pfn_to_mfn() only in special
 *   cases needing an extended handling.
 */
static inline unsigned long __pfn_to_mfn(unsigned long pfn)
{
	unsigned long mfn;

	if (pfn < xen_p2m_size)
		mfn = xen_p2m_addr[pfn];
	else if (unlikely(pfn < xen_max_p2m_pfn))
		return get_phys_to_machine(pfn);
	else
		return IDENTITY_FRAME(pfn);

	if (unlikely(mfn == INVALID_P2M_ENTRY))
		return get_phys_to_machine(pfn);

	return mfn;
}

static inline unsigned long pfn_to_mfn(unsigned long pfn)
{
	unsigned long mfn;

	/*
	 * Some x86 code are still using pfn_to_mfn instead of
	 * pfn_to_mfn. This will have to be removed when we figured
	 * out which call.
	 */
	if (xen_feature(XENFEAT_auto_translated_physmap))
		return pfn;

	mfn = __pfn_to_mfn(pfn);

	if (mfn != INVALID_P2M_ENTRY)
		mfn &= ~(FOREIGN_FRAME_BIT | IDENTITY_FRAME_BIT);

	return mfn;
}

static inline int phys_to_machine_mapping_valid(unsigned long pfn)
{
	if (xen_feature(XENFEAT_auto_translated_physmap))
		return 1;

	return __pfn_to_mfn(pfn) != INVALID_P2M_ENTRY;
}

static inline unsigned long mfn_to_pfn_no_overrides(unsigned long mfn)
{
	unsigned long pfn;
	int ret;

	if (xen_feature(XENFEAT_auto_translated_physmap))
		return mfn;

	if (unlikely(mfn >= machine_to_phys_nr))
		return ~0;

	/*
	 * The array access can fail (e.g., device space beyond end of RAM).
	 * In such cases it doesn't matter what we return (we return garbage),
	 * but we must handle the fault without crashing!
	 */
	ret = xen_safe_read_ulong(&machine_to_phys_mapping[mfn], &pfn);
	if (ret < 0)
		return ~0;

	return pfn;
}

static inline unsigned long mfn_to_pfn(unsigned long mfn)
{
	unsigned long pfn;

	/*
	 * Some x86 code are still using mfn_to_pfn instead of
	 * gfn_to_pfn. This will have to be removed when we figure
	 * out which call.
	 */
	if (xen_feature(XENFEAT_auto_translated_physmap))
		return mfn;

	pfn = mfn_to_pfn_no_overrides(mfn);
	if (__pfn_to_mfn(pfn) != mfn)
		pfn = ~0;

	/*
	 * pfn is ~0 if there are no entries in the m2p for mfn or the
	 * entry doesn't map back to the mfn.
	 */
	if (pfn == ~0 && __pfn_to_mfn(mfn) == IDENTITY_FRAME(mfn))
		pfn = mfn;

	return pfn;
}

static inline xmaddr_t phys_to_machine(xpaddr_t phys)
{
	unsigned offset = phys.paddr & ~PAGE_MASK;
	return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset);
}

static inline xpaddr_t machine_to_phys(xmaddr_t machine)
{
	unsigned offset = machine.maddr & ~PAGE_MASK;
	return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset);
}

/* Pseudo-physical <-> Guest conversion */
static inline unsigned long pfn_to_gfn(unsigned long pfn)
{
	if (xen_feature(XENFEAT_auto_translated_physmap))
		return pfn;
	else
		return pfn_to_mfn(pfn);
}

static inline unsigned long gfn_to_pfn(unsigned long gfn)
{
	if (xen_feature(XENFEAT_auto_translated_physmap))
		return gfn;
	else
		return mfn_to_pfn(gfn);
}

/* Pseudo-physical <-> Bus conversion */
#define pfn_to_bfn(pfn)		pfn_to_gfn(pfn)
#define bfn_to_pfn(bfn)		gfn_to_pfn(bfn)

/*
 * We detect special mappings in one of two ways:
 *  1. If the MFN is an I/O page then Xen will set the m2p entry
 *     to be outside our maximum possible pseudophys range.
 *  2. If the MFN belongs to a different domain then we will certainly
 *     not have MFN in our p2m table. Conversely, if the page is ours,
 *     then we'll have p2m(m2p(MFN))==MFN.
 * If we detect a special mapping then it doesn't have a 'struct page'.
 * We force !pfn_valid() by returning an out-of-range pointer.
 *
 * NB. These checks require that, for any MFN that is not in our reservation,
 * there is no PFN such that p2m(PFN) == MFN. Otherwise we can get confused if
 * we are foreign-mapping the MFN, and the other domain as m2p(MFN) == PFN.
 * Yikes! Various places must poke in INVALID_P2M_ENTRY for safety.
 *
 * NB2. When deliberately mapping foreign pages into the p2m table, you *must*
 *      use FOREIGN_FRAME(). This will cause pte_pfn() to choke on it, as we
 *      require. In all the cases we care about, the FOREIGN_FRAME bit is
 *      masked (e.g., pfn_to_mfn()) so behaviour there is correct.
 */
static inline unsigned long bfn_to_local_pfn(unsigned long mfn)
{
	unsigned long pfn;

	if (xen_feature(XENFEAT_auto_translated_physmap))
		return mfn;

	pfn = mfn_to_pfn(mfn);
	if (__pfn_to_mfn(pfn) != mfn)
		return -1; /* force !pfn_valid() */
	return pfn;
}

/* VIRT <-> MACHINE conversion */
#define virt_to_machine(v)	(phys_to_machine(XPADDR(__pa(v))))
#define virt_to_pfn(v)          (PFN_DOWN(__pa(v)))
#define virt_to_mfn(v)		(pfn_to_mfn(virt_to_pfn(v)))
#define mfn_to_virt(m)		(__va(mfn_to_pfn(m) << PAGE_SHIFT))

/* VIRT <-> GUEST conversion */
#define virt_to_gfn(v)		(pfn_to_gfn(virt_to_pfn(v)))
#define gfn_to_virt(g)		(__va(gfn_to_pfn(g) << PAGE_SHIFT))

static inline unsigned long pte_mfn(pte_t pte)
{
	return (pte.pte & PTE_PFN_MASK) >> PAGE_SHIFT;
}

static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot)
{
	pte_t pte;

	pte.pte = ((phys_addr_t)page_nr << PAGE_SHIFT) |
			massage_pgprot(pgprot);

	return pte;
}

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

static inline pte_t __pte_ma(pteval_t x)
{
	return (pte_t) { .pte = x };
}

#define pmd_val_ma(v) ((v).pmd)
#ifdef __PAGETABLE_PUD_FOLDED
#define pud_val_ma(v) ((v).pgd.pgd)
#else
#define pud_val_ma(v) ((v).pud)
#endif
#define __pmd_ma(x)	((pmd_t) { (x) } )

#define pgd_val_ma(x)	((x).pgd)

void xen_set_domain_pte(pte_t *ptep, pte_t pteval, unsigned domid);

xmaddr_t arbitrary_virt_to_machine(void *address);
unsigned long arbitrary_virt_to_mfn(void *vaddr);
void make_lowmem_page_readonly(void *vaddr);
void make_lowmem_page_readwrite(void *vaddr);

#define xen_remap(cookie, size) ioremap((cookie), (size));
#define xen_unmap(cookie) iounmap((cookie))

static inline bool xen_arch_need_swiotlb(struct device *dev,
					 phys_addr_t phys,
					 dma_addr_t dev_addr)
{
	return false;
}

static inline unsigned long xen_get_swiotlb_free_pages(unsigned int order)
{
	return __get_free_pages(__GFP_NOWARN, order);
}

#endif /* _ASM_X86_XEN_PAGE_H */
Commit	Line	Data
05e4d316 PA	1	#ifndef _ASM_X86_XEN_PAGE_H
05e4d316 PA	2	#define _ASM_X86_XEN_PAGE_H
20e71f2e	3
ecbf29cd JF	4	#include <linux/kernel.h>
	5	#include <linux/types.h>
	6	#include <linux/spinlock.h>
20e71f2e	7	#include <linux/pfn.h>
7e77506a	8	#include <linux/mm.h>
20e71f2e	9
7c0f6ba6	10	#include <linux/uaccess.h>
ecbf29cd	11	#include <asm/page.h>
20e71f2e IY	12	#include <asm/pgtable.h>
20e71f2e IY	13
ecbf29cd	14	#include <xen/interface/xen.h>
008c320a	15	#include <xen/interface/grant_table.h>
20e71f2e IY	16	#include <xen/features.h>
	17
	18	/* Xen machine address */
	19	typedef struct xmaddr {
	20	phys_addr_t maddr;
	21	} xmaddr_t;
	22
	23	/* Xen pseudo-physical address */
	24	typedef struct xpaddr {
	25	phys_addr_t paddr;
	26	} xpaddr_t;
	27
	28	#define XMADDR(x) ((xmaddr_t) { .maddr = (x) })
	29	#define XPADDR(x) ((xpaddr_t) { .paddr = (x) })
	30
	31	/** MACHINE <-> PHYSICAL CONVERSION MACROS **/
	32	#define INVALID_P2M_ENTRY (~0UL)
f4cec35b KRW	33	#define FOREIGN_FRAME_BIT (1UL<<(BITS_PER_LONG-1))
f4cec35b KRW	34	#define IDENTITY_FRAME_BIT (1UL<<(BITS_PER_LONG-2))
20e71f2e	35	#define FOREIGN_FRAME(m) ((m) \| FOREIGN_FRAME_BIT)
f4cec35b	36	#define IDENTITY_FRAME(m) ((m) \| IDENTITY_FRAME_BIT)
20e71f2e	37
cb3eb850 JG	38	#define P2M_PER_PAGE (PAGE_SIZE / sizeof(unsigned long))
cb3eb850 JG	39
7e77506a	40	extern unsigned long *machine_to_phys_mapping;
ccbcdf7c	41	extern unsigned long machine_to_phys_nr;
5b8e7d80 JG	42	extern unsigned long *xen_p2m_addr;
	43	extern unsigned long xen_p2m_size;
	44	extern unsigned long xen_max_p2m_pfn;
8006ec3e	45
8edfcf88 DV	46	extern int xen_alloc_p2m_entry(unsigned long pfn);
8edfcf88 DV	47
d451bb7a	48	extern unsigned long get_phys_to_machine(unsigned long pfn);
c3798062	49	extern bool set_phys_to_machine(unsigned long pfn, unsigned long mfn);
6eaa412f	50	extern bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
cb3eb850 JG	51	extern unsigned long __init set_phys_range_identity(unsigned long pfn_s,
cb3eb850 JG	52	unsigned long pfn_e);
20e71f2e	53
1429d46d ZK	54	extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
	55	struct gnttab_map_grant_ref *kmap_ops,
	56	struct page **pages, unsigned int count);
1429d46d	57	extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
853d0289	58	struct gnttab_unmap_grant_ref *kunmap_ops,
1429d46d	59	struct page **pages, unsigned int count);
448f2831	60
90fff3ea JG	61	/*
	62	* Helper functions to write or read unsigned long values to/from
	63	* memory, when the access may fault.
	64	*/
	65	static inline int xen_safe_write_ulong(unsigned long *addr, unsigned long val)
	66	{
	67	return __put_user(val, (unsigned long __user *)addr);
	68	}
	69
	70	static inline int xen_safe_read_ulong(unsigned long addr, unsigned long val)
	71	{
	72	return __get_user(val, (unsigned long __user )addr);
	73	}
	74
0aad5689 JG	75	/*
	76	* When to use pfn_to_mfn(), __pfn_to_mfn() or get_phys_to_machine():
	77	* - pfn_to_mfn() returns either INVALID_P2M_ENTRY or the mfn. No indicator
	78	* bits (identity or foreign) are set.
	79	* - __pfn_to_mfn() returns the found entry of the p2m table. A possibly set
	80	* identity or foreign indicator will be still set. __pfn_to_mfn() is
054954eb JG	81	* encapsulating get_phys_to_machine() which is called in special cases only.
	82	* - get_phys_to_machine() is to be called by __pfn_to_mfn() only in special
	83	* cases needing an extended handling.
0aad5689 JG	84	*/
	85	static inline unsigned long __pfn_to_mfn(unsigned long pfn)
	86	{
054954eb JG	87	unsigned long mfn;
	88
	89	if (pfn < xen_p2m_size)
	90	mfn = xen_p2m_addr[pfn];
	91	else if (unlikely(pfn < xen_max_p2m_pfn))
	92	return get_phys_to_machine(pfn);
	93	else
	94	return IDENTITY_FRAME(pfn);
	95
	96	if (unlikely(mfn == INVALID_P2M_ENTRY))
	97	return get_phys_to_machine(pfn);
	98
	99	return mfn;
0aad5689 JG	100	}
0aad5689 JG	101
20e71f2e IY	102	static inline unsigned long pfn_to_mfn(unsigned long pfn)
20e71f2e IY	103	{
cfd8951e JF	104	unsigned long mfn;
cfd8951e JF	105
0df4f266 JG	106	/*
	107	* Some x86 code are still using pfn_to_mfn instead of
	108	* pfn_to_mfn. This will have to be removed when we figured
	109	* out which call.
	110	*/
20e71f2e IY	111	if (xen_feature(XENFEAT_auto_translated_physmap))
	112	return pfn;
	113
0aad5689	114	mfn = __pfn_to_mfn(pfn);
cfd8951e JF	115
cfd8951e JF	116	if (mfn != INVALID_P2M_ENTRY)
f4cec35b	117	mfn &= ~(FOREIGN_FRAME_BIT \| IDENTITY_FRAME_BIT);
cfd8951e JF	118
cfd8951e JF	119	return mfn;
20e71f2e IY	120	}
	121
	122	static inline int phys_to_machine_mapping_valid(unsigned long pfn)
	123	{
	124	if (xen_feature(XENFEAT_auto_translated_physmap))
	125	return 1;
	126
0aad5689	127	return __pfn_to_mfn(pfn) != INVALID_P2M_ENTRY;
20e71f2e IY	128	}
20e71f2e IY	129
0160676b	130	static inline unsigned long mfn_to_pfn_no_overrides(unsigned long mfn)
20e71f2e IY	131	{
20e71f2e IY	132	unsigned long pfn;
0160676b	133	int ret;
20e71f2e IY	134
	135	if (xen_feature(XENFEAT_auto_translated_physmap))
	136	return mfn;
	137
0160676b DV	138	if (unlikely(mfn >= machine_to_phys_nr))
	139	return ~0;
	140
20e71f2e IY	141	/*
	142	* The array access can fail (e.g., device space beyond end of RAM).
	143	* In such cases it doesn't matter what we return (we return garbage),
	144	* but we must handle the fault without crashing!
	145	*/
90fff3ea	146	ret = xen_safe_read_ulong(&machine_to_phys_mapping[mfn], &pfn);
706cc9d2	147	if (ret < 0)
0160676b DV	148	return ~0;
	149
	150	return pfn;
	151	}
	152
	153	static inline unsigned long mfn_to_pfn(unsigned long mfn)
	154	{
	155	unsigned long pfn;
	156
0df4f266 JG	157	/*
	158	* Some x86 code are still using mfn_to_pfn instead of
	159	* gfn_to_pfn. This will have to be removed when we figure
	160	* out which call.
	161	*/
0160676b DV	162	if (xen_feature(XENFEAT_auto_translated_physmap))
	163	return mfn;
	164
	165	pfn = mfn_to_pfn_no_overrides(mfn);
0bb599fd DV	166	if (__pfn_to_mfn(pfn) != mfn)
0bb599fd DV	167	pfn = ~0;
706cc9d2	168
1429d46d	169	/*
0bb599fd DV	170	* pfn is ~0 if there are no entries in the m2p for mfn or the
0bb599fd DV	171	* entry doesn't map back to the mfn.
448f2831	172	*/
0aad5689	173	if (pfn == ~0 && __pfn_to_mfn(mfn) == IDENTITY_FRAME(mfn))
706cc9d2	174	pfn = mfn;
448f2831	175
20e71f2e IY	176	return pfn;
	177	}
	178
	179	static inline xmaddr_t phys_to_machine(xpaddr_t phys)
	180	{
	181	unsigned offset = phys.paddr & ~PAGE_MASK;
947d0496	182	return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) \| offset);
20e71f2e IY	183	}
	184
	185	static inline xpaddr_t machine_to_phys(xmaddr_t machine)
	186	{
	187	unsigned offset = machine.maddr & ~PAGE_MASK;
947d0496	188	return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) \| offset);
20e71f2e IY	189	}
20e71f2e IY	190
0df4f266 JG	191	/* Pseudo-physical <-> Guest conversion */
	192	static inline unsigned long pfn_to_gfn(unsigned long pfn)
	193	{
	194	if (xen_feature(XENFEAT_auto_translated_physmap))
	195	return pfn;
	196	else
	197	return pfn_to_mfn(pfn);
	198	}
	199
	200	static inline unsigned long gfn_to_pfn(unsigned long gfn)
	201	{
	202	if (xen_feature(XENFEAT_auto_translated_physmap))
	203	return gfn;
	204	else
	205	return mfn_to_pfn(gfn);
	206	}
	207
32e09870	208	/* Pseudo-physical <-> Bus conversion */
0df4f266 JG	209	#define pfn_to_bfn(pfn) pfn_to_gfn(pfn)
0df4f266 JG	210	#define bfn_to_pfn(bfn) gfn_to_pfn(bfn)
32e09870	211
20e71f2e IY	212	/*
	213	* We detect special mappings in one of two ways:
	214	* 1. If the MFN is an I/O page then Xen will set the m2p entry
	215	* to be outside our maximum possible pseudophys range.
	216	* 2. If the MFN belongs to a different domain then we will certainly
	217	* not have MFN in our p2m table. Conversely, if the page is ours,
	218	* then we'll have p2m(m2p(MFN))==MFN.
	219	* If we detect a special mapping then it doesn't have a 'struct page'.
	220	* We force !pfn_valid() by returning an out-of-range pointer.
	221	*
	222	* NB. These checks require that, for any MFN that is not in our reservation,
	223	* there is no PFN such that p2m(PFN) == MFN. Otherwise we can get confused if
	224	* we are foreign-mapping the MFN, and the other domain as m2p(MFN) == PFN.
	225	* Yikes! Various places must poke in INVALID_P2M_ENTRY for safety.
	226	*
	227	* NB2. When deliberately mapping foreign pages into the p2m table, you must
	228	* use FOREIGN_FRAME(). This will cause pte_pfn() to choke on it, as we
	229	* require. In all the cases we care about, the FOREIGN_FRAME bit is
	230	* masked (e.g., pfn_to_mfn()) so behaviour there is correct.
	231	*/
32e09870	232	static inline unsigned long bfn_to_local_pfn(unsigned long mfn)
20e71f2e	233	{
fc590efe MR	234	unsigned long pfn;
	235
	236	if (xen_feature(XENFEAT_auto_translated_physmap))
	237	return mfn;
	238
	239	pfn = mfn_to_pfn(mfn);
0aad5689	240	if (__pfn_to_mfn(pfn) != mfn)
c0011dbf	241	return -1; /* force !pfn_valid() */
20e71f2e IY	242	return pfn;
	243	}
	244
20e71f2e IY	245	/* VIRT <-> MACHINE conversion */
20e71f2e IY	246	#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v))))
b40bf53e AN	247	#define virt_to_pfn(v) (PFN_DOWN(__pa(v)))
b40bf53e AN	248	#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
20e71f2e IY	249	#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
20e71f2e IY	250
0df4f266 JG	251	/* VIRT <-> GUEST conversion */
	252	#define virt_to_gfn(v) (pfn_to_gfn(virt_to_pfn(v)))
	253	#define gfn_to_virt(g) (__va(gfn_to_pfn(g) << PAGE_SHIFT))
	254
20e71f2e IY	255	static inline unsigned long pte_mfn(pte_t pte)
20e71f2e IY	256	{
59438c9f	257	return (pte.pte & PTE_PFN_MASK) >> PAGE_SHIFT;
20e71f2e IY	258	}
	259
	260	static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot)
	261	{
	262	pte_t pte;
	263
	264	pte.pte = ((phys_addr_t)page_nr << PAGE_SHIFT) \|
b534816b	265	massage_pgprot(pgprot);
20e71f2e IY	266
	267	return pte;
	268	}
	269
	270	static inline pteval_t pte_val_ma(pte_t pte)
	271	{
	272	return pte.pte;
	273	}
	274
	275	static inline pte_t __pte_ma(pteval_t x)
	276	{
	277	return (pte_t) { .pte = x };
	278	}
	279
20e71f2e	280	#define pmd_val_ma(v) ((v).pmd)
f6e58732	281	#ifdef __PAGETABLE_PUD_FOLDED
20e71f2e	282	#define pud_val_ma(v) ((v).pgd.pgd)
f6e58732 JF	283	#else
	284	#define pud_val_ma(v) ((v).pud)
	285	#endif
20e71f2e	286	#define __pmd_ma(x) ((pmd_t) { (x) } )
20e71f2e IY	287
	288	#define pgd_val_ma(x) ((x).pgd)
	289
eba3ff8b	290	void xen_set_domain_pte(pte_t *ptep, pte_t pteval, unsigned domid);
20e71f2e	291
ce803e70	292	xmaddr_t arbitrary_virt_to_machine(void *address);
9976b39b	293	unsigned long arbitrary_virt_to_mfn(void *vaddr);
20e71f2e IY	294	void make_lowmem_page_readonly(void *vaddr);
	295	void make_lowmem_page_readwrite(void *vaddr);
	296
3216dceb	297	#define xen_remap(cookie, size) ioremap((cookie), (size));
efaf30a3	298	#define xen_unmap(cookie) iounmap((cookie))
3216dceb	299
a4dba130	300	static inline bool xen_arch_need_swiotlb(struct device *dev,
291be10f JG	301	phys_addr_t phys,
291be10f JG	302	dma_addr_t dev_addr)
a4dba130 SS	303	{
	304	return false;
	305	}
	306
8746515d SS	307	static inline unsigned long xen_get_swiotlb_free_pages(unsigned int order)
	308	{
	309	return __get_free_pages(__GFP_NOWARN, order);
	310	}
	311
05e4d316	312	#endif /* _ASM_X86_XEN_PAGE_H */