118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/* 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) \
|
|
({ \
|
|
WARN_ON_ONCE(!virt_addr_valid(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 */
|