1 | /****************************************************************************** |
2 | * grant_table.h |
3 | * |
4 | * Interface for granting foreign access to page frames, and receiving |
5 | * page-ownership transfers. |
6 | * |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
8 | * of this software and associated documentation files (the "Software"), to |
9 | * deal in the Software without restriction, including without limitation the |
10 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
11 | * sell copies of the Software, and to permit persons to whom the Software is |
12 | * furnished to do so, subject to the following conditions: |
13 | * |
14 | * The above copyright notice and this permission notice shall be included in |
15 | * all copies or substantial portions of the Software. |
16 | * |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
23 | * DEALINGS IN THE SOFTWARE. |
24 | * |
25 | * Copyright (c) 2004, K A Fraser |
26 | */ |
27 | |
28 | #ifndef __XEN_PUBLIC_GRANT_TABLE_H__ |
29 | #define __XEN_PUBLIC_GRANT_TABLE_H__ |
30 | |
31 | #include <xen/interface/xen.h> |
32 | |
33 | /*********************************** |
34 | * GRANT TABLE REPRESENTATION |
35 | */ |
36 | |
37 | /* Some rough guidelines on accessing and updating grant-table entries |
38 | * in a concurrency-safe manner. For more information, Linux contains a |
39 | * reference implementation for guest OSes (arch/xen/kernel/grant_table.c). |
40 | * |
41 | * NB. WMB is a no-op on current-generation x86 processors. However, a |
42 | * compiler barrier will still be required. |
43 | * |
44 | * Introducing a valid entry into the grant table: |
45 | * 1. Write ent->domid. |
46 | * 2. Write ent->frame: |
47 | * GTF_permit_access: Frame to which access is permitted. |
48 | * GTF_accept_transfer: Pseudo-phys frame slot being filled by new |
49 | * frame, or zero if none. |
50 | * 3. Write memory barrier (WMB). |
51 | * 4. Write ent->flags, inc. valid type. |
52 | * |
53 | * Invalidating an unused GTF_permit_access entry: |
54 | * 1. flags = ent->flags. |
55 | * 2. Observe that !(flags & (GTF_reading|GTF_writing)). |
56 | * 3. Check result of SMP-safe CMPXCHG(&ent->flags, flags, 0). |
57 | * NB. No need for WMB as reuse of entry is control-dependent on success of |
58 | * step 3, and all architectures guarantee ordering of ctrl-dep writes. |
59 | * |
60 | * Invalidating an in-use GTF_permit_access entry: |
61 | * This cannot be done directly. Request assistance from the domain controller |
62 | * which can set a timeout on the use of a grant entry and take necessary |
63 | * action. (NB. This is not yet implemented!). |
64 | * |
65 | * Invalidating an unused GTF_accept_transfer entry: |
66 | * 1. flags = ent->flags. |
67 | * 2. Observe that !(flags & GTF_transfer_committed). [*] |
68 | * 3. Check result of SMP-safe CMPXCHG(&ent->flags, flags, 0). |
69 | * NB. No need for WMB as reuse of entry is control-dependent on success of |
70 | * step 3, and all architectures guarantee ordering of ctrl-dep writes. |
71 | * [*] If GTF_transfer_committed is set then the grant entry is 'committed'. |
72 | * The guest must /not/ modify the grant entry until the address of the |
73 | * transferred frame is written. It is safe for the guest to spin waiting |
74 | * for this to occur (detect by observing GTF_transfer_completed in |
75 | * ent->flags). |
76 | * |
77 | * Invalidating a committed GTF_accept_transfer entry: |
78 | * 1. Wait for (ent->flags & GTF_transfer_completed). |
79 | * |
80 | * Changing a GTF_permit_access from writable to read-only: |
81 | * Use SMP-safe CMPXCHG to set GTF_readonly, while checking !GTF_writing. |
82 | * |
83 | * Changing a GTF_permit_access from read-only to writable: |
84 | * Use SMP-safe bit-setting instruction. |
85 | */ |
86 | |
87 | /* |
88 | * Reference to a grant entry in a specified domain's grant table. |
89 | */ |
90 | typedef uint32_t grant_ref_t; |
91 | |
92 | /* |
93 | * A grant table comprises a packed array of grant entries in one or more |
94 | * page frames shared between Xen and a guest. |
95 | * [XEN]: This field is written by Xen and read by the sharing guest. |
96 | * [GST]: This field is written by the guest and read by Xen. |
97 | */ |
98 | |
99 | /* |
100 | * Version 1 of the grant table entry structure is maintained purely |
101 | * for backwards compatibility. New guests should use version 2. |
102 | */ |
103 | struct grant_entry_v1 { |
104 | /* GTF_xxx: various type and flag information. [XEN,GST] */ |
105 | uint16_t flags; |
106 | /* The domain being granted foreign privileges. [GST] */ |
107 | domid_t domid; |
108 | /* |
109 | * GTF_permit_access: Frame that @domid is allowed to map and access. [GST] |
110 | * GTF_accept_transfer: Frame whose ownership transferred by @domid. [XEN] |
111 | */ |
112 | uint32_t frame; |
113 | }; |
114 | |
115 | /* |
116 | * Type of grant entry. |
117 | * GTF_invalid: This grant entry grants no privileges. |
118 | * GTF_permit_access: Allow @domid to map/access @frame. |
119 | * GTF_accept_transfer: Allow @domid to transfer ownership of one page frame |
120 | * to this guest. Xen writes the page number to @frame. |
121 | * GTF_transitive: Allow @domid to transitively access a subrange of |
122 | * @trans_grant in @trans_domid. No mappings are allowed. |
123 | */ |
124 | #define GTF_invalid (0U<<0) |
125 | #define GTF_permit_access (1U<<0) |
126 | #define GTF_accept_transfer (2U<<0) |
127 | #define GTF_transitive (3U<<0) |
128 | #define GTF_type_mask (3U<<0) |
129 | |
130 | /* |
131 | * Subflags for GTF_permit_access. |
132 | * GTF_readonly: Restrict @domid to read-only mappings and accesses. [GST] |
133 | * GTF_reading: Grant entry is currently mapped for reading by @domid. [XEN] |
134 | * GTF_writing: Grant entry is currently mapped for writing by @domid. [XEN] |
135 | * GTF_sub_page: Grant access to only a subrange of the page. @domid |
136 | * will only be allowed to copy from the grant, and not |
137 | * map it. [GST] |
138 | */ |
139 | #define _GTF_readonly (2) |
140 | #define GTF_readonly (1U<<_GTF_readonly) |
141 | #define _GTF_reading (3) |
142 | #define GTF_reading (1U<<_GTF_reading) |
143 | #define _GTF_writing (4) |
144 | #define GTF_writing (1U<<_GTF_writing) |
145 | #define _GTF_sub_page (8) |
146 | #define GTF_sub_page (1U<<_GTF_sub_page) |
147 | |
148 | /* |
149 | * Subflags for GTF_accept_transfer: |
150 | * GTF_transfer_committed: Xen sets this flag to indicate that it is committed |
151 | * to transferring ownership of a page frame. When a guest sees this flag |
152 | * it must /not/ modify the grant entry until GTF_transfer_completed is |
153 | * set by Xen. |
154 | * GTF_transfer_completed: It is safe for the guest to spin-wait on this flag |
155 | * after reading GTF_transfer_committed. Xen will always write the frame |
156 | * address, followed by ORing this flag, in a timely manner. |
157 | */ |
158 | #define _GTF_transfer_committed (2) |
159 | #define GTF_transfer_committed (1U<<_GTF_transfer_committed) |
160 | #define _GTF_transfer_completed (3) |
161 | #define GTF_transfer_completed (1U<<_GTF_transfer_completed) |
162 | |
163 | /* |
164 | * Version 2 grant table entries. These fulfil the same role as |
165 | * version 1 entries, but can represent more complicated operations. |
166 | * Any given domain will have either a version 1 or a version 2 table, |
167 | * and every entry in the table will be the same version. |
168 | * |
169 | * The interface by which domains use grant references does not depend |
170 | * on the grant table version in use by the other domain. |
171 | */ |
172 | |
173 | /* |
174 | * Version 1 and version 2 grant entries share a common prefix. The |
175 | * fields of the prefix are documented as part of struct |
176 | * grant_entry_v1. |
177 | */ |
178 | struct { |
179 | uint16_t ; |
180 | domid_t ; |
181 | }; |
182 | |
183 | /* |
184 | * Version 2 of the grant entry structure, here is a union because three |
185 | * different types are suppotted: full_page, sub_page and transitive. |
186 | */ |
187 | union grant_entry_v2 { |
188 | struct grant_entry_header hdr; |
189 | |
190 | /* |
191 | * This member is used for V1-style full page grants, where either: |
192 | * |
193 | * -- hdr.type is GTF_accept_transfer, or |
194 | * -- hdr.type is GTF_permit_access and GTF_sub_page is not set. |
195 | * |
196 | * In that case, the frame field has the same semantics as the |
197 | * field of the same name in the V1 entry structure. |
198 | */ |
199 | struct { |
200 | struct grant_entry_header hdr; |
201 | uint32_t pad0; |
202 | uint64_t frame; |
203 | } full_page; |
204 | |
205 | /* |
206 | * If the grant type is GTF_grant_access and GTF_sub_page is set, |
207 | * @domid is allowed to access bytes [@page_off,@page_off+@length) |
208 | * in frame @frame. |
209 | */ |
210 | struct { |
211 | struct grant_entry_header hdr; |
212 | uint16_t page_off; |
213 | uint16_t length; |
214 | uint64_t frame; |
215 | } sub_page; |
216 | |
217 | /* |
218 | * If the grant is GTF_transitive, @domid is allowed to use the |
219 | * grant @gref in domain @trans_domid, as if it was the local |
220 | * domain. Obviously, the transitive access must be compatible |
221 | * with the original grant. |
222 | */ |
223 | struct { |
224 | struct grant_entry_header hdr; |
225 | domid_t trans_domid; |
226 | uint16_t pad0; |
227 | grant_ref_t gref; |
228 | } transitive; |
229 | |
230 | uint32_t __spacer[4]; /* Pad to a power of two */ |
231 | }; |
232 | |
233 | typedef uint16_t grant_status_t; |
234 | |
235 | /*********************************** |
236 | * GRANT TABLE QUERIES AND USES |
237 | */ |
238 | |
239 | /* |
240 | * Handle to track a mapping created via a grant reference. |
241 | */ |
242 | typedef uint32_t grant_handle_t; |
243 | |
244 | /* |
245 | * GNTTABOP_map_grant_ref: Map the grant entry (<dom>,<ref>) for access |
246 | * by devices and/or host CPUs. If successful, <handle> is a tracking number |
247 | * that must be presented later to destroy the mapping(s). On error, <handle> |
248 | * is a negative status code. |
249 | * NOTES: |
250 | * 1. If GNTMAP_device_map is specified then <dev_bus_addr> is the address |
251 | * via which I/O devices may access the granted frame. |
252 | * 2. If GNTMAP_host_map is specified then a mapping will be added at |
253 | * either a host virtual address in the current address space, or at |
254 | * a PTE at the specified machine address. The type of mapping to |
255 | * perform is selected through the GNTMAP_contains_pte flag, and the |
256 | * address is specified in <host_addr>. |
257 | * 3. Mappings should only be destroyed via GNTTABOP_unmap_grant_ref. If a |
258 | * host mapping is destroyed by other means then it is *NOT* guaranteed |
259 | * to be accounted to the correct grant reference! |
260 | */ |
261 | #define GNTTABOP_map_grant_ref 0 |
262 | struct gnttab_map_grant_ref { |
263 | /* IN parameters. */ |
264 | uint64_t host_addr; |
265 | uint32_t flags; /* GNTMAP_* */ |
266 | grant_ref_t ref; |
267 | domid_t dom; |
268 | /* OUT parameters. */ |
269 | int16_t status; /* GNTST_* */ |
270 | grant_handle_t handle; |
271 | uint64_t dev_bus_addr; |
272 | }; |
273 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_map_grant_ref); |
274 | |
275 | /* |
276 | * GNTTABOP_unmap_grant_ref: Destroy one or more grant-reference mappings |
277 | * tracked by <handle>. If <host_addr> or <dev_bus_addr> is zero, that |
278 | * field is ignored. If non-zero, they must refer to a device/host mapping |
279 | * that is tracked by <handle> |
280 | * NOTES: |
281 | * 1. The call may fail in an undefined manner if either mapping is not |
282 | * tracked by <handle>. |
283 | * 3. After executing a batch of unmaps, it is guaranteed that no stale |
284 | * mappings will remain in the device or host TLBs. |
285 | */ |
286 | #define GNTTABOP_unmap_grant_ref 1 |
287 | struct gnttab_unmap_grant_ref { |
288 | /* IN parameters. */ |
289 | uint64_t host_addr; |
290 | uint64_t dev_bus_addr; |
291 | grant_handle_t handle; |
292 | /* OUT parameters. */ |
293 | int16_t status; /* GNTST_* */ |
294 | }; |
295 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_grant_ref); |
296 | |
297 | /* |
298 | * GNTTABOP_setup_table: Set up a grant table for <dom> comprising at least |
299 | * <nr_frames> pages. The frame addresses are written to the <frame_list>. |
300 | * Only <nr_frames> addresses are written, even if the table is larger. |
301 | * NOTES: |
302 | * 1. <dom> may be specified as DOMID_SELF. |
303 | * 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF. |
304 | * 3. Xen may not support more than a single grant-table page per domain. |
305 | */ |
306 | #define GNTTABOP_setup_table 2 |
307 | struct gnttab_setup_table { |
308 | /* IN parameters. */ |
309 | domid_t dom; |
310 | uint32_t nr_frames; |
311 | /* OUT parameters. */ |
312 | int16_t status; /* GNTST_* */ |
313 | GUEST_HANDLE(xen_pfn_t) frame_list; |
314 | }; |
315 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_setup_table); |
316 | |
317 | /* |
318 | * GNTTABOP_dump_table: Dump the contents of the grant table to the |
319 | * xen console. Debugging use only. |
320 | */ |
321 | #define GNTTABOP_dump_table 3 |
322 | struct gnttab_dump_table { |
323 | /* IN parameters. */ |
324 | domid_t dom; |
325 | /* OUT parameters. */ |
326 | int16_t status; /* GNTST_* */ |
327 | }; |
328 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_dump_table); |
329 | |
330 | /* |
331 | * GNTTABOP_transfer_grant_ref: Transfer <frame> to a foreign domain. The |
332 | * foreign domain has previously registered its interest in the transfer via |
333 | * <domid, ref>. |
334 | * |
335 | * Note that, even if the transfer fails, the specified page no longer belongs |
336 | * to the calling domain *unless* the error is GNTST_bad_page. |
337 | */ |
338 | #define GNTTABOP_transfer 4 |
339 | struct gnttab_transfer { |
340 | /* IN parameters. */ |
341 | xen_pfn_t mfn; |
342 | domid_t domid; |
343 | grant_ref_t ref; |
344 | /* OUT parameters. */ |
345 | int16_t status; |
346 | }; |
347 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_transfer); |
348 | |
349 | /* |
350 | * GNTTABOP_copy: Hypervisor based copy |
351 | * source and destinations can be eithers MFNs or, for foreign domains, |
352 | * grant references. the foreign domain has to grant read/write access |
353 | * in its grant table. |
354 | * |
355 | * The flags specify what type source and destinations are (either MFN |
356 | * or grant reference). |
357 | * |
358 | * Note that this can also be used to copy data between two domains |
359 | * via a third party if the source and destination domains had previously |
360 | * grant appropriate access to their pages to the third party. |
361 | * |
362 | * source_offset specifies an offset in the source frame, dest_offset |
363 | * the offset in the target frame and len specifies the number of |
364 | * bytes to be copied. |
365 | */ |
366 | |
367 | #define _GNTCOPY_source_gref (0) |
368 | #define GNTCOPY_source_gref (1<<_GNTCOPY_source_gref) |
369 | #define _GNTCOPY_dest_gref (1) |
370 | #define GNTCOPY_dest_gref (1<<_GNTCOPY_dest_gref) |
371 | |
372 | #define GNTTABOP_copy 5 |
373 | struct gnttab_copy { |
374 | /* IN parameters. */ |
375 | struct { |
376 | union { |
377 | grant_ref_t ref; |
378 | xen_pfn_t gmfn; |
379 | } u; |
380 | domid_t domid; |
381 | uint16_t offset; |
382 | } source, dest; |
383 | uint16_t len; |
384 | uint16_t flags; /* GNTCOPY_* */ |
385 | /* OUT parameters. */ |
386 | int16_t status; |
387 | }; |
388 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_copy); |
389 | |
390 | /* |
391 | * GNTTABOP_query_size: Query the current and maximum sizes of the shared |
392 | * grant table. |
393 | * NOTES: |
394 | * 1. <dom> may be specified as DOMID_SELF. |
395 | * 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF. |
396 | */ |
397 | #define GNTTABOP_query_size 6 |
398 | struct gnttab_query_size { |
399 | /* IN parameters. */ |
400 | domid_t dom; |
401 | /* OUT parameters. */ |
402 | uint32_t nr_frames; |
403 | uint32_t max_nr_frames; |
404 | int16_t status; /* GNTST_* */ |
405 | }; |
406 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_size); |
407 | |
408 | /* |
409 | * GNTTABOP_unmap_and_replace: Destroy one or more grant-reference mappings |
410 | * tracked by <handle> but atomically replace the page table entry with one |
411 | * pointing to the machine address under <new_addr>. <new_addr> will be |
412 | * redirected to the null entry. |
413 | * NOTES: |
414 | * 1. The call may fail in an undefined manner if either mapping is not |
415 | * tracked by <handle>. |
416 | * 2. After executing a batch of unmaps, it is guaranteed that no stale |
417 | * mappings will remain in the device or host TLBs. |
418 | */ |
419 | #define GNTTABOP_unmap_and_replace 7 |
420 | struct gnttab_unmap_and_replace { |
421 | /* IN parameters. */ |
422 | uint64_t host_addr; |
423 | uint64_t new_addr; |
424 | grant_handle_t handle; |
425 | /* OUT parameters. */ |
426 | int16_t status; /* GNTST_* */ |
427 | }; |
428 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_and_replace); |
429 | |
430 | /* |
431 | * GNTTABOP_set_version: Request a particular version of the grant |
432 | * table shared table structure. This operation can only be performed |
433 | * once in any given domain. It must be performed before any grants |
434 | * are activated; otherwise, the domain will be stuck with version 1. |
435 | * The only defined versions are 1 and 2. |
436 | */ |
437 | #define GNTTABOP_set_version 8 |
438 | struct gnttab_set_version { |
439 | /* IN parameters */ |
440 | uint32_t version; |
441 | }; |
442 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_set_version); |
443 | |
444 | /* |
445 | * GNTTABOP_get_status_frames: Get the list of frames used to store grant |
446 | * status for <dom>. In grant format version 2, the status is separated |
447 | * from the other shared grant fields to allow more efficient synchronization |
448 | * using barriers instead of atomic cmpexch operations. |
449 | * <nr_frames> specify the size of vector <frame_list>. |
450 | * The frame addresses are returned in the <frame_list>. |
451 | * Only <nr_frames> addresses are returned, even if the table is larger. |
452 | * NOTES: |
453 | * 1. <dom> may be specified as DOMID_SELF. |
454 | * 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF. |
455 | */ |
456 | #define GNTTABOP_get_status_frames 9 |
457 | struct gnttab_get_status_frames { |
458 | /* IN parameters. */ |
459 | uint32_t nr_frames; |
460 | domid_t dom; |
461 | /* OUT parameters. */ |
462 | int16_t status; /* GNTST_* */ |
463 | GUEST_HANDLE(uint64_t) frame_list; |
464 | }; |
465 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_status_frames); |
466 | |
467 | /* |
468 | * GNTTABOP_get_version: Get the grant table version which is in |
469 | * effect for domain <dom>. |
470 | */ |
471 | #define GNTTABOP_get_version 10 |
472 | struct gnttab_get_version { |
473 | /* IN parameters */ |
474 | domid_t dom; |
475 | uint16_t pad; |
476 | /* OUT parameters */ |
477 | uint32_t version; |
478 | }; |
479 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_version); |
480 | |
481 | /* |
482 | * Issue one or more cache maintenance operations on a portion of a |
483 | * page granted to the calling domain by a foreign domain. |
484 | */ |
485 | #define GNTTABOP_cache_flush 12 |
486 | struct gnttab_cache_flush { |
487 | union { |
488 | uint64_t dev_bus_addr; |
489 | grant_ref_t ref; |
490 | } a; |
491 | uint16_t offset; /* offset from start of grant */ |
492 | uint16_t length; /* size within the grant */ |
493 | #define GNTTAB_CACHE_CLEAN (1<<0) |
494 | #define GNTTAB_CACHE_INVAL (1<<1) |
495 | #define GNTTAB_CACHE_SOURCE_GREF (1<<31) |
496 | uint32_t op; |
497 | }; |
498 | DEFINE_GUEST_HANDLE_STRUCT(gnttab_cache_flush); |
499 | |
500 | /* |
501 | * Bitfield values for update_pin_status.flags. |
502 | */ |
503 | /* Map the grant entry for access by I/O devices. */ |
504 | #define _GNTMAP_device_map (0) |
505 | #define GNTMAP_device_map (1<<_GNTMAP_device_map) |
506 | /* Map the grant entry for access by host CPUs. */ |
507 | #define _GNTMAP_host_map (1) |
508 | #define GNTMAP_host_map (1<<_GNTMAP_host_map) |
509 | /* Accesses to the granted frame will be restricted to read-only access. */ |
510 | #define _GNTMAP_readonly (2) |
511 | #define GNTMAP_readonly (1<<_GNTMAP_readonly) |
512 | /* |
513 | * GNTMAP_host_map subflag: |
514 | * 0 => The host mapping is usable only by the guest OS. |
515 | * 1 => The host mapping is usable by guest OS + current application. |
516 | */ |
517 | #define _GNTMAP_application_map (3) |
518 | #define GNTMAP_application_map (1<<_GNTMAP_application_map) |
519 | |
520 | /* |
521 | * GNTMAP_contains_pte subflag: |
522 | * 0 => This map request contains a host virtual address. |
523 | * 1 => This map request contains the machine addess of the PTE to update. |
524 | */ |
525 | #define _GNTMAP_contains_pte (4) |
526 | #define GNTMAP_contains_pte (1<<_GNTMAP_contains_pte) |
527 | |
528 | /* |
529 | * Bits to be placed in guest kernel available PTE bits (architecture |
530 | * dependent; only supported when XENFEAT_gnttab_map_avail_bits is set). |
531 | */ |
532 | #define _GNTMAP_guest_avail0 (16) |
533 | #define GNTMAP_guest_avail_mask ((uint32_t)~0 << _GNTMAP_guest_avail0) |
534 | |
535 | /* |
536 | * Values for error status returns. All errors are -ve. |
537 | */ |
538 | #define GNTST_okay (0) /* Normal return. */ |
539 | #define GNTST_general_error (-1) /* General undefined error. */ |
540 | #define GNTST_bad_domain (-2) /* Unrecognsed domain id. */ |
541 | #define GNTST_bad_gntref (-3) /* Unrecognised or inappropriate gntref. */ |
542 | #define GNTST_bad_handle (-4) /* Unrecognised or inappropriate handle. */ |
543 | #define GNTST_bad_virt_addr (-5) /* Inappropriate virtual address to map. */ |
544 | #define GNTST_bad_dev_addr (-6) /* Inappropriate device address to unmap.*/ |
545 | #define GNTST_no_device_space (-7) /* Out of space in I/O MMU. */ |
546 | #define GNTST_permission_denied (-8) /* Not enough privilege for operation. */ |
547 | #define GNTST_bad_page (-9) /* Specified page was invalid for op. */ |
548 | #define GNTST_bad_copy_arg (-10) /* copy arguments cross page boundary. */ |
549 | #define GNTST_address_too_big (-11) /* transfer page address too large. */ |
550 | #define GNTST_eagain (-12) /* Operation not done; try again. */ |
551 | |
552 | #define GNTTABOP_error_msgs { \ |
553 | "okay", \ |
554 | "undefined error", \ |
555 | "unrecognised domain id", \ |
556 | "invalid grant reference", \ |
557 | "invalid mapping handle", \ |
558 | "invalid virtual address", \ |
559 | "invalid device address", \ |
560 | "no spare translation slot in the I/O MMU", \ |
561 | "permission denied", \ |
562 | "bad page", \ |
563 | "copy arguments cross page boundary", \ |
564 | "page address size too large", \ |
565 | "operation not done; try again" \ |
566 | } |
567 | |
568 | #endif /* __XEN_PUBLIC_GRANT_TABLE_H__ */ |
569 | |