/******************************************************************************
* grant_table.h
- *
+ *
* Interface for granting foreign access to page frames, and receiving
* page-ownership transfers.
- *
+ *
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
/* Some rough guidelines on accessing and updating grant-table entries
* in a concurrency-safe manner. For more information, Linux contains a
* reference implementation for guest OSes (arch/xen/kernel/grant_table.c).
- *
+ *
* NB. WMB is a no-op on current-generation x86 processors. However, a
* compiler barrier will still be required.
- *
+ *
* Introducing a valid entry into the grant table:
* 1. Write ent->domid.
* 2. Write ent->frame:
* frame, or zero if none.
* 3. Write memory barrier (WMB).
* 4. Write ent->flags, inc. valid type.
- *
+ *
* Invalidating an unused GTF_permit_access entry:
* 1. flags = ent->flags.
* 2. Observe that !(flags & (GTF_reading|GTF_writing)).
* This cannot be done directly. Request assistance from the domain controller
* which can set a timeout on the use of a grant entry and take necessary
* action. (NB. This is not yet implemented!).
- *
+ *
* Invalidating an unused GTF_accept_transfer entry:
* 1. flags = ent->flags.
* 2. Observe that !(flags & GTF_transfer_committed). [*]
*
* Changing a GTF_permit_access from writable to read-only:
* Use SMP-safe CMPXCHG to set GTF_readonly, while checking !GTF_writing.
- *
+ *
* Changing a GTF_permit_access from read-only to writable:
* Use SMP-safe bit-setting instruction.
*/
*/
uint32_t frame;
};
-typedef struct grant_entry grant_entry_t;
/*
* Type of grant entry.
* GTF_readonly: Restrict @domid to read-only mappings and accesses. [GST]
* GTF_reading: Grant entry is currently mapped for reading by @domid. [XEN]
* GTF_writing: Grant entry is currently mapped for writing by @domid. [XEN]
- * GTF_PAT, GTF_PWT, GTF_PCD: (x86) cache attribute flags for the grant [GST]
*/
#define _GTF_readonly (2)
#define GTF_readonly (1U<<_GTF_readonly)
#define GTF_reading (1U<<_GTF_reading)
#define _GTF_writing (4)
#define GTF_writing (1U<<_GTF_writing)
-#define _GTF_PWT (5)
-#define GTF_PWT (1U<<_GTF_PWT)
-#define _GTF_PCD (6)
-#define GTF_PCD (1U<<_GTF_PCD)
-#define _GTF_PAT (7)
-#define GTF_PAT (1U<<_GTF_PAT)
/*
* Subflags for GTF_accept_transfer:
* 2. If GNTMAP_host_map is specified then a mapping will be added at
* either a host virtual address in the current address space, or at
* a PTE at the specified machine address. The type of mapping to
- * perform is selected through the GNTMAP_contains_pte flag, and the
+ * perform is selected through the GNTMAP_contains_pte flag, and the
* address is specified in <host_addr>.
* 3. Mappings should only be destroyed via GNTTABOP_unmap_grant_ref. If a
* host mapping is destroyed by other means then it is *NOT* guaranteed
grant_handle_t handle;
uint64_t dev_bus_addr;
};
-typedef struct gnttab_map_grant_ref gnttab_map_grant_ref_t;
-DEFINE_XEN_GUEST_HANDLE(gnttab_map_grant_ref_t);
/*
* GNTTABOP_unmap_grant_ref: Destroy one or more grant-reference mappings
/* OUT parameters. */
int16_t status; /* GNTST_* */
};
-typedef struct gnttab_unmap_grant_ref gnttab_unmap_grant_ref_t;
-DEFINE_XEN_GUEST_HANDLE(gnttab_unmap_grant_ref_t);
/*
* GNTTABOP_setup_table: Set up a grant table for <dom> comprising at least
uint32_t nr_frames;
/* OUT parameters. */
int16_t status; /* GNTST_* */
- XEN_GUEST_HANDLE(ulong) frame_list;
+ ulong *frame_list;
};
-typedef struct gnttab_setup_table gnttab_setup_table_t;
-DEFINE_XEN_GUEST_HANDLE(gnttab_setup_table_t);
/*
* GNTTABOP_dump_table: Dump the contents of the grant table to the
/* OUT parameters. */
int16_t status; /* GNTST_* */
};
-typedef struct gnttab_dump_table gnttab_dump_table_t;
-DEFINE_XEN_GUEST_HANDLE(gnttab_dump_table_t);
/*
* GNTTABOP_transfer_grant_ref: Transfer <frame> to a foreign domain. The
* foreign domain has previously registered its interest in the transfer via
* <domid, ref>.
- *
+ *
* Note that, even if the transfer fails, the specified page no longer belongs
* to the calling domain *unless* the error is GNTST_bad_page.
*/
#define GNTTABOP_transfer 4
struct gnttab_transfer {
/* IN parameters. */
- xen_pfn_t mfn;
+ unsigned long mfn;
domid_t domid;
grant_ref_t ref;
/* OUT parameters. */
int16_t status;
};
-typedef struct gnttab_transfer gnttab_transfer_t;
-DEFINE_XEN_GUEST_HANDLE(gnttab_transfer_t);
/*
#define GNTCOPY_dest_gref (1<<_GNTCOPY_dest_gref)
#define GNTTABOP_copy 5
-typedef struct gnttab_copy {
- /* IN parameters. */
- struct {
- union {
- grant_ref_t ref;
- xen_pfn_t gmfn;
- } u;
- domid_t domid;
- uint16_t offset;
- } source, dest;
- uint16_t len;
- uint16_t flags; /* GNTCOPY_* */
- /* OUT parameters. */
- int16_t status;
-} gnttab_copy_t;
-DEFINE_XEN_GUEST_HANDLE(gnttab_copy_t);
+struct gnttab_copy {
+ /* IN parameters. */
+ struct {
+ union {
+ grant_ref_t ref;
+ unsigned long gmfn;
+ } u;
+ domid_t domid;
+ uint16_t offset;
+ } source, dest;
+ uint16_t len;
+ uint16_t flags; /* GNTCOPY_* */
+ /* OUT parameters. */
+ int16_t status;
+};
/*
* GNTTABOP_query_size: Query the current and maximum sizes of the shared
uint32_t max_nr_frames;
int16_t status; /* GNTST_* */
};
-typedef struct gnttab_query_size gnttab_query_size_t;
-DEFINE_XEN_GUEST_HANDLE(gnttab_query_size_t);
-
-/*
- * GNTTABOP_unmap_and_replace: Destroy one or more grant-reference mappings
- * tracked by <handle> but atomically replace the page table entry with one
- * pointing to the machine address under <new_addr>. <new_addr> will be
- * redirected to the null entry.
- * NOTES:
- * 1. The call may fail in an undefined manner if either mapping is not
- * tracked by <handle>.
- * 2. After executing a batch of unmaps, it is guaranteed that no stale
- * mappings will remain in the device or host TLBs.
- */
-#define GNTTABOP_unmap_and_replace 7
-struct gnttab_unmap_and_replace {
- /* IN parameters. */
- uint64_t host_addr;
- uint64_t new_addr;
- grant_handle_t handle;
- /* OUT parameters. */
- int16_t status; /* GNTST_* */
-};
-typedef struct gnttab_unmap_and_replace gnttab_unmap_and_replace_t;
-DEFINE_XEN_GUEST_HANDLE(gnttab_unmap_and_replace_t);
/*
#define GNTST_no_device_space (-7) /* Out of space in I/O MMU. */
#define GNTST_permission_denied (-8) /* Not enough privilege for operation. */
#define GNTST_bad_page (-9) /* Specified page was invalid for op. */
-#define GNTST_bad_copy_arg (-10) /* copy arguments cross page boundary. */
-#define GNTST_address_too_big (-11) /* transfer page address too large. */
+#define GNTST_bad_copy_arg (-10) /* copy arguments cross page boundary */
#define GNTTABOP_error_msgs { \
"okay", \
"no spare translation slot in the I/O MMU", \
"permission denied", \
"bad page", \
- "copy arguments cross page boundary", \
- "page address size too large" \
+ "copy arguments cross page boundary" \
}
#endif /* __XEN_PUBLIC_GRANT_TABLE_H__ */
-
-/*
- * Local variables:
- * mode: C
- * c-set-style: "BSD"
- * c-basic-offset: 4
- * tab-width: 4
- * indent-tabs-mode: nil
- * End:
- */
projects / linux-flexiantxendom0-3.2.10.git / blobdiff