[mirror_ubuntu-jammy-kernel.git] / include / xen / arm / page.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_ARM_XEN_PAGE_H
#define _ASM_ARM_XEN_PAGE_H

#include <asm/page.h>

#include <linux/pfn.h>
#include <linux/types.h>
#include <linux/dma-mapping.h>
#include <linux/pgtable.h>

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

#define phys_to_machine_mapping_valid(pfn) (1)

/* 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) })

#define INVALID_P2M_ENTRY      (~0UL)

/*
 * The pseudo-physical frame (pfn) used in all the helpers is always based
 * on Xen page granularity (i.e 4KB).
 *
 * A Linux page may be split across multiple non-contiguous Xen page so we
 * have to keep track with frame based on 4KB page granularity.
 *
 * PV drivers should never make a direct usage of those helpers (particularly
 * pfn_to_gfn and gfn_to_pfn).
 */

unsigned long __pfn_to_mfn(unsigned long pfn);
extern struct rb_root phys_to_mach;

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

static inline unsigned long gfn_to_pfn(unsigned long gfn)
{
	return gfn;
}

/* Pseudo-physical <-> BUS conversion */
static inline unsigned long pfn_to_bfn(unsigned long pfn)
{
	unsigned long mfn;

	if (phys_to_mach.rb_node != NULL) {
		mfn = __pfn_to_mfn(pfn);
		if (mfn != INVALID_P2M_ENTRY)
			return mfn;
	}

	return pfn;
}

static inline unsigned long bfn_to_pfn(unsigned long bfn)
{
	return bfn;
}

#define bfn_to_local_pfn(bfn)	bfn_to_pfn(bfn)

/* VIRT <-> GUEST conversion */
#define virt_to_gfn(v)		(pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT))
#define gfn_to_virt(m)		(__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT))

/* Only used in PV code. But ARM guests are always HVM. */
static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
{
	BUG();
}

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);

bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
		unsigned long nr_pages);

static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
{
	return __set_phys_to_machine(pfn, mfn);
}

#define xen_remap(cookie, size) ioremap_cache((cookie), (size))
#define xen_unmap(cookie) iounmap((cookie))

bool xen_arch_need_swiotlb(struct device *dev,
			   phys_addr_t phys,
			   dma_addr_t dev_addr);
unsigned long xen_get_swiotlb_free_pages(unsigned int order);

#endif /* _ASM_ARM_XEN_PAGE_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
2fbadc30 MZ	2	#ifndef _ASM_ARM_XEN_PAGE_H
	3	#define _ASM_ARM_XEN_PAGE_H
	4
	5	#include <asm/page.h>
2fbadc30 MZ	6
	7	#include <linux/pfn.h>
	8	#include <linux/types.h>
	9	#include <linux/dma-mapping.h>
65fddcfc	10	#include <linux/pgtable.h>
2fbadc30 MZ	11
	12	#include <xen/xen.h>
	13	#include <xen/interface/grant_table.h>
	14
	15	#define phys_to_machine_mapping_valid(pfn) (1)
	16
	17	/* Xen machine address */
	18	typedef struct xmaddr {
	19	phys_addr_t maddr;
	20	} xmaddr_t;
	21
	22	/* Xen pseudo-physical address */
	23	typedef struct xpaddr {
	24	phys_addr_t paddr;
	25	} xpaddr_t;
	26
	27	#define XMADDR(x) ((xmaddr_t) { .maddr = (x) })
	28	#define XPADDR(x) ((xpaddr_t) { .paddr = (x) })
	29
	30	#define INVALID_P2M_ENTRY (~0UL)
	31
	32	/*
	33	* The pseudo-physical frame (pfn) used in all the helpers is always based
	34	* on Xen page granularity (i.e 4KB).
	35	*
	36	* A Linux page may be split across multiple non-contiguous Xen page so we
	37	* have to keep track with frame based on 4KB page granularity.
	38	*
	39	* PV drivers should never make a direct usage of those helpers (particularly
	40	* pfn_to_gfn and gfn_to_pfn).
	41	*/
	42
	43	unsigned long __pfn_to_mfn(unsigned long pfn);
	44	extern struct rb_root phys_to_mach;
	45
	46	/* Pseudo-physical <-> Guest conversion */
	47	static inline unsigned long pfn_to_gfn(unsigned long pfn)
	48	{
	49	return pfn;
	50	}
	51
	52	static inline unsigned long gfn_to_pfn(unsigned long gfn)
	53	{
	54	return gfn;
	55	}
	56
	57	/* Pseudo-physical <-> BUS conversion */
	58	static inline unsigned long pfn_to_bfn(unsigned long pfn)
	59	{
	60	unsigned long mfn;
	61
	62	if (phys_to_mach.rb_node != NULL) {
	63	mfn = __pfn_to_mfn(pfn);
	64	if (mfn != INVALID_P2M_ENTRY)
	65	return mfn;
	66	}
	67
	68	return pfn;
	69	}
	70
	71	static inline unsigned long bfn_to_pfn(unsigned long bfn)
	72	{
	73	return bfn;
	74	}
75
76	#define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn)
77
78	/* VIRT <-> GUEST conversion */
79	#define virt_to_gfn(v) (pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT))
80	#define gfn_to_virt(m) (__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT))
81
82	/* Only used in PV code. But ARM guests are always HVM. */
83	static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
84	{
85	BUG();
86	}
87
2fbadc30 MZ	88	extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
	89	struct gnttab_map_grant_ref *kmap_ops,
	90	struct page **pages, unsigned int count);
	91
	92	extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
	93	struct gnttab_unmap_grant_ref *kunmap_ops,
	94	struct page **pages, unsigned int count);
	95
	96	bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
	97	bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
	98	unsigned long nr_pages);
	99
	100	static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
	101	{
	102	return __set_phys_to_machine(pfn, mfn);
	103	}
	104
	105	#define xen_remap(cookie, size) ioremap_cache((cookie), (size))
	106	#define xen_unmap(cookie) iounmap((cookie))
	107
	108	bool xen_arch_need_swiotlb(struct device *dev,
	109	phys_addr_t phys,
	110	dma_addr_t dev_addr);
	111	unsigned long xen_get_swiotlb_free_pages(unsigned int order);
	112
	113	#endif /* _ASM_ARM_XEN_PAGE_H */