projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 2fbadc30 MZ |
1 | #ifndef _ASM_ARM_XEN_PAGE_H |
| 2 | #define _ASM_ARM_XEN_PAGE_H | |
| 3 | ||
| 4 | #include <asm/page.h> | |
| 5 | #include <asm/pgtable.h> | |
| 6 | ||
| 7 | #include <linux/pfn.h> | |
| 8 | #include <linux/types.h> | |
| 9 | #include <linux/dma-mapping.h> | |
| 10 | ||
| 11 | #include <xen/xen.h> | |
| 12 | #include <xen/interface/grant_table.h> | |
| 13 | ||
| 14 | #define phys_to_machine_mapping_valid(pfn) (1) | |
| 15 | ||
| 16 | /* Xen machine address */ | |
| 17 | typedef struct xmaddr { | |
| 18 | phys_addr_t maddr; | |
| 19 | } xmaddr_t; | |
| 20 | ||
| 21 | /* Xen pseudo-physical address */ | |
| 22 | typedef struct xpaddr { | |
| 23 | phys_addr_t paddr; | |
| 24 | } xpaddr_t; | |
| 25 | ||
| 26 | #define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) | |
| 27 | #define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) | |
| 28 | ||
| 29 | #define INVALID_P2M_ENTRY (~0UL) | |
| 30 | ||
| 31 | /* | |
| 32 | * The pseudo-physical frame (pfn) used in all the helpers is always based | |
| 33 | * on Xen page granularity (i.e 4KB). | |
| 34 | * | |
| 35 | * A Linux page may be split across multiple non-contiguous Xen page so we | |
| 36 | * have to keep track with frame based on 4KB page granularity. | |
| 37 | * | |
| 38 | * PV drivers should never make a direct usage of those helpers (particularly | |
| 39 | * pfn_to_gfn and gfn_to_pfn). | |
| 40 | */ | |
| 41 | ||
| 42 | unsigned long __pfn_to_mfn(unsigned long pfn); | |
| 43 | extern struct rb_root phys_to_mach; | |
| 44 | ||
| 45 | /* Pseudo-physical <-> Guest conversion */ | |
| 46 | static inline unsigned long pfn_to_gfn(unsigned long pfn) | |
| 47 | { | |
| 48 | return pfn; | |
| 49 | } | |
| 50 | ||
| 51 | static inline unsigned long gfn_to_pfn(unsigned long gfn) | |
| 52 | { | |
| 53 | return gfn; | |
| 54 | } | |
| 55 | ||
| 56 | /* Pseudo-physical <-> BUS conversion */ | |
| 57 | static inline unsigned long pfn_to_bfn(unsigned long pfn) | |
| 58 | { | |
| 59 | unsigned long mfn; | |
| 60 | ||
| 61 | if (phys_to_mach.rb_node != NULL) { | |
| 62 | mfn = __pfn_to_mfn(pfn); | |
| 63 | if (mfn != INVALID_P2M_ENTRY) | |
| 64 | return mfn; | |
| 65 | } | |
| 66 | ||
| 67 | return pfn; | |
| 68 | } | |
| 69 | ||
| 70 | static inline unsigned long bfn_to_pfn(unsigned long bfn) | |
| 71 | { | |
| 72 | return bfn; | |
| 73 | } | |
| 74 | ||
| 75 | #define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn) | |
| 76 | ||
| 77 | /* VIRT <-> GUEST conversion */ | |
| 78 | #define virt_to_gfn(v) (pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT)) | |
| 79 | #define gfn_to_virt(m) (__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT)) | |
| 80 | ||
| 81 | /* Only used in PV code. But ARM guests are always HVM. */ | |
| 82 | static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) | |
| 83 | { | |
| 84 | BUG(); | |
| 85 | } | |
| 86 | ||
| 87 | /* TODO: this shouldn't be here but it is because the frontend drivers | |
| 88 | * are using it (its rolled in headers) even though we won't hit the code path. | |
| 89 | * So for right now just punt with this. | |
| 90 | */ | |
| 91 | static inline pte_t *lookup_address(unsigned long address, unsigned int *level) | |
| 92 | { | |
| 93 | BUG(); | |
| 94 | return NULL; | |
| 95 | } | |
| 96 | ||
| 97 | extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, | |
| 98 | struct gnttab_map_grant_ref *kmap_ops, | |
| 99 | struct page **pages, unsigned int count); | |
| 100 | ||
| 101 | extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, | |
| 102 | struct gnttab_unmap_grant_ref *kunmap_ops, | |
| 103 | struct page **pages, unsigned int count); | |
| 104 | ||
| 105 | bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); | |
| 106 | bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn, | |
| 107 | unsigned long nr_pages); | |
| 108 | ||
| 109 | static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) | |
| 110 | { | |
| 111 | return __set_phys_to_machine(pfn, mfn); | |
| 112 | } | |
| 113 | ||
| 114 | #define xen_remap(cookie, size) ioremap_cache((cookie), (size)) | |
| 115 | #define xen_unmap(cookie) iounmap((cookie)) | |
| 116 | ||
| 117 | bool xen_arch_need_swiotlb(struct device *dev, | |
| 118 | phys_addr_t phys, | |
| 119 | dma_addr_t dev_addr); | |
| 120 | unsigned long xen_get_swiotlb_free_pages(unsigned int order); | |
| 121 | ||
| 122 | #endif /* _ASM_ARM_XEN_PAGE_H */ |