1 /******************************************************************************
2  * memory.h
3  *
4  * Memory reservation and information.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to
8  * deal in the Software without restriction, including without limitation the
9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10  * sell copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  *
24  * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
25  */
26 
27 #ifndef __XEN_PUBLIC_MEMORY_H__
28 #define __XEN_PUBLIC_MEMORY_H__
29 
30 #include "xen.h"
31 #include "physdev.h"
32 
33 /*
34  * Increase or decrease the specified domain's memory reservation. Returns the
35  * number of extents successfully allocated or freed.
36  * arg == addr of struct xen_memory_reservation.
37  */
38 #define XENMEM_increase_reservation 0
39 #define XENMEM_decrease_reservation 1
40 #define XENMEM_populate_physmap     6
41 
42 #if __XEN_INTERFACE_VERSION__ >= 0x00030209
43 /*
44  * Maximum # bits addressable by the user of the allocated region (e.g., I/O
45  * devices often have a 32-bit limitation even in 64-bit systems). If zero
46  * then the user has no addressing restriction. This field is not used by
47  * XENMEM_decrease_reservation.
48  */
49 #define XENMEMF_address_bits(x)     (x)
50 #define XENMEMF_get_address_bits(x) ((x) & 0xffu)
51 /* NUMA node to allocate from. */
52 #define XENMEMF_node(x)     (((x) + 1) << 8)
53 #define XENMEMF_get_node(x) ((((x) >> 8) - 1) & 0xffu)
54 /* Flag to populate physmap with populate-on-demand entries */
55 #define XENMEMF_populate_on_demand (1<<16)
56 /* Flag to request allocation only from the node specified */
57 #define XENMEMF_exact_node_request  (1<<17)
58 #define XENMEMF_exact_node(n) (XENMEMF_node(n) | XENMEMF_exact_node_request)
59 /* Flag to indicate the node specified is virtual node */
60 #define XENMEMF_vnode  (1<<18)
61 #endif
62 
63 struct xen_memory_reservation {
64 
65     /*
66      * XENMEM_increase_reservation:
67      *   OUT: MFN (*not* GMFN) bases of extents that were allocated
68      * XENMEM_decrease_reservation:
69      *   IN:  GMFN bases of extents to free
70      * XENMEM_populate_physmap:
71      *   IN:  GPFN bases of extents to populate with memory
72      *   OUT: GMFN bases of extents that were allocated
73      *   (NB. This command also updates the mach_to_phys translation table)
74      * XENMEM_claim_pages:
75      *   IN: must be zero
76      */
77     XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
78 
79     /* Number of extents, and size/alignment of each (2^extent_order pages). */
80     xen_ulong_t    nr_extents;
81     unsigned int   extent_order;
82 
83 #if __XEN_INTERFACE_VERSION__ >= 0x00030209
84     /* XENMEMF flags. */
85     unsigned int   mem_flags;
86 #else
87     unsigned int   address_bits;
88 #endif
89 
90     /*
91      * Domain whose reservation is being changed.
92      * Unprivileged domains can specify only DOMID_SELF.
93      */
94     domid_t        domid;
95 };
96 typedef struct xen_memory_reservation xen_memory_reservation_t;
97 DEFINE_XEN_GUEST_HANDLE(xen_memory_reservation_t);
98 
99 /*
100  * An atomic exchange of memory pages. If return code is zero then
101  * @out.extent_list provides GMFNs of the newly-allocated memory.
102  * Returns zero on complete success, otherwise a negative error code.
103  * On complete success then always @nr_exchanged == @in.nr_extents.
104  * On partial success @nr_exchanged indicates how much work was done.
105  *
106  * Note that only PV guests can use this operation.
107  */
108 #define XENMEM_exchange             11
109 struct xen_memory_exchange {
110     /*
111      * [IN] Details of memory extents to be exchanged (GMFN bases).
112      * Note that @in.address_bits is ignored and unused.
113      */
114     struct xen_memory_reservation in;
115 
116     /*
117      * [IN/OUT] Details of new memory extents.
118      * We require that:
119      *  1. @in.domid == @out.domid
120      *  2. @in.nr_extents  << @in.extent_order ==
121      *     @out.nr_extents << @out.extent_order
122      *  3. @in.extent_start and @out.extent_start lists must not overlap
123      *  4. @out.extent_start lists GPFN bases to be populated
124      *  5. @out.extent_start is overwritten with allocated GMFN bases
125      */
126     struct xen_memory_reservation out;
127 
128     /*
129      * [OUT] Number of input extents that were successfully exchanged:
130      *  1. The first @nr_exchanged input extents were successfully
131      *     deallocated.
132      *  2. The corresponding first entries in the output extent list correctly
133      *     indicate the GMFNs that were successfully exchanged.
134      *  3. All other input and output extents are untouched.
135      *  4. If not all input exents are exchanged then the return code of this
136      *     command will be non-zero.
137      *  5. THIS FIELD MUST BE INITIALISED TO ZERO BY THE CALLER!
138      */
139     xen_ulong_t nr_exchanged;
140 };
141 typedef struct xen_memory_exchange xen_memory_exchange_t;
142 DEFINE_XEN_GUEST_HANDLE(xen_memory_exchange_t);
143 
144 /*
145  * Returns the maximum machine frame number of mapped RAM in this system.
146  * This command always succeeds (it never returns an error code).
147  * arg == NULL.
148  */
149 #define XENMEM_maximum_ram_page     2
150 
151 /*
152  * Returns the current or maximum memory reservation, in pages, of the
153  * specified domain (may be DOMID_SELF). Returns -ve errcode on failure.
154  * arg == addr of domid_t.
155  */
156 #define XENMEM_current_reservation  3
157 #define XENMEM_maximum_reservation  4
158 
159 /*
160  * Returns the maximum GPFN in use by the guest, or -ve errcode on failure.
161  */
162 #define XENMEM_maximum_gpfn         14
163 
164 /*
165  * Returns a list of MFN bases of 2MB extents comprising the machine_to_phys
166  * mapping table. Architectures which do not have a m2p table do not implement
167  * this command.
168  * arg == addr of xen_machphys_mfn_list_t.
169  */
170 #define XENMEM_machphys_mfn_list    5
171 struct xen_machphys_mfn_list {
172     /*
173      * Size of the 'extent_start' array. Fewer entries will be filled if the
174      * machphys table is smaller than max_extents * 2MB.
175      */
176     unsigned int max_extents;
177 
178     /*
179      * Pointer to buffer to fill with list of extent starts. If there are
180      * any large discontiguities in the machine address space, 2MB gaps in
181      * the machphys table will be represented by an MFN base of zero.
182      */
183     XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
184 
185     /*
186      * Number of extents written to the above array. This will be smaller
187      * than 'max_extents' if the machphys table is smaller than max_e * 2MB.
188      */
189     unsigned int nr_extents;
190 };
191 typedef struct xen_machphys_mfn_list xen_machphys_mfn_list_t;
192 DEFINE_XEN_GUEST_HANDLE(xen_machphys_mfn_list_t);
193 
194 /*
195  * For a compat caller, this is identical to XENMEM_machphys_mfn_list.
196  *
197  * For a non compat caller, this functions similarly to
198  * XENMEM_machphys_mfn_list, but returns the mfns making up the compatibility
199  * m2p table.
200  */
201 #define XENMEM_machphys_compat_mfn_list     25
202 
203 /*
204  * Returns the location in virtual address space of the machine_to_phys
205  * mapping table. Architectures which do not have a m2p table, or which do not
206  * map it by default into guest address space, do not implement this command.
207  * arg == addr of xen_machphys_mapping_t.
208  */
209 #define XENMEM_machphys_mapping     12
210 struct xen_machphys_mapping {
211     xen_ulong_t v_start, v_end; /* Start and end virtual addresses.   */
212     xen_ulong_t max_mfn;        /* Maximum MFN that can be looked up. */
213 };
214 typedef struct xen_machphys_mapping xen_machphys_mapping_t;
215 DEFINE_XEN_GUEST_HANDLE(xen_machphys_mapping_t);
216 
217 /* Source mapping space. */
218 /* ` enum phys_map_space { */
219 #define XENMAPSPACE_shared_info  0 /* shared info page */
220 #define XENMAPSPACE_grant_table  1 /* grant table page */
221 #define XENMAPSPACE_gmfn         2 /* GMFN */
222 #define XENMAPSPACE_gmfn_range   3 /* GMFN range, XENMEM_add_to_physmap only. */
223 #define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
224                                     * XENMEM_add_to_physmap_batch only. */
225 #define XENMAPSPACE_dev_mmio     5 /* device mmio region
226                                       ARM only; the region is mapped in
227                                       Stage-2 using the Normal Memory
228                                       Inner/Outer Write-Back Cacheable
229                                       memory attribute. */
230 /* ` } */
231 
232 /*
233  * Sets the GPFN at which a particular page appears in the specified guest's
234  * pseudophysical address space.
235  * arg == addr of xen_add_to_physmap_t.
236  */
237 #define XENMEM_add_to_physmap      7
238 struct xen_add_to_physmap {
239     /* Which domain to change the mapping for. */
240     domid_t domid;
241 
242     /* Number of pages to go through for gmfn_range */
243     uint16_t    size;
244 
245     unsigned int space; /* => enum phys_map_space */
246 
247 #define XENMAPIDX_grant_table_status 0x80000000
248 
249     /* Index into space being mapped. */
250     xen_ulong_t idx;
251 
252     /* GPFN in domid where the source mapping page should appear. */
253     xen_pfn_t     gpfn;
254 };
255 typedef struct xen_add_to_physmap xen_add_to_physmap_t;
256 DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
257 
258 /* A batched version of add_to_physmap. */
259 #define XENMEM_add_to_physmap_batch 23
260 struct xen_add_to_physmap_batch {
261     /* IN */
262     /* Which domain to change the mapping for. */
263     domid_t domid;
264     uint16_t space; /* => enum phys_map_space */
265 
266     /* Number of pages to go through */
267     uint16_t size;
268 
269 #if __XEN_INTERFACE_VERSION__ < 0x00040700
270     domid_t foreign_domid; /* IFF gmfn_foreign. Should be 0 for other spaces. */
271 #else
272     union xen_add_to_physmap_batch_extra {
273         domid_t foreign_domid; /* gmfn_foreign */
274         uint16_t res0;  /* All the other spaces. Should be 0 */
275     } u;
276 #endif
277 
278     /* Indexes into space being mapped. */
279     XEN_GUEST_HANDLE(xen_ulong_t) idxs;
280 
281     /* GPFN in domid where the source mapping page should appear. */
282     XEN_GUEST_HANDLE(xen_pfn_t) gpfns;
283 
284     /* OUT */
285 
286     /* Per index error code. */
287     XEN_GUEST_HANDLE(int) errs;
288 };
289 typedef struct xen_add_to_physmap_batch xen_add_to_physmap_batch_t;
290 DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_batch_t);
291 
292 #if __XEN_INTERFACE_VERSION__ < 0x00040400
293 #define XENMEM_add_to_physmap_range XENMEM_add_to_physmap_batch
294 #define xen_add_to_physmap_range xen_add_to_physmap_batch
295 typedef struct xen_add_to_physmap_batch xen_add_to_physmap_range_t;
296 DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_range_t);
297 #endif
298 
299 /*
300  * Unmaps the page appearing at a particular GPFN from the specified guest's
301  * pseudophysical address space.
302  * arg == addr of xen_remove_from_physmap_t.
303  */
304 #define XENMEM_remove_from_physmap      15
305 struct xen_remove_from_physmap {
306     /* Which domain to change the mapping for. */
307     domid_t domid;
308 
309     /* GPFN of the current mapping of the page. */
310     xen_pfn_t     gpfn;
311 };
312 typedef struct xen_remove_from_physmap xen_remove_from_physmap_t;
313 DEFINE_XEN_GUEST_HANDLE(xen_remove_from_physmap_t);
314 
315 /*** REMOVED ***/
316 /*#define XENMEM_translate_gpfn_list  8*/
317 
318 /*
319  * Returns the pseudo-physical memory map as it was when the domain
320  * was started (specified by XENMEM_set_memory_map).
321  * arg == addr of xen_memory_map_t.
322  */
323 #define XENMEM_memory_map           9
324 struct xen_memory_map {
325     /*
326      * On call the number of entries which can be stored in buffer. On
327      * return the number of entries which have been stored in
328      * buffer.
329      */
330     unsigned int nr_entries;
331 
332     /*
333      * Entries in the buffer are in the same format as returned by the
334      * BIOS INT 0x15 EAX=0xE820 call.
335      */
336     XEN_GUEST_HANDLE(void) buffer;
337 };
338 typedef struct xen_memory_map xen_memory_map_t;
339 DEFINE_XEN_GUEST_HANDLE(xen_memory_map_t);
340 
341 /*
342  * Returns the real physical memory map. Passes the same structure as
343  * XENMEM_memory_map.
344  * Specifying buffer as NULL will return the number of entries required
345  * to store the complete memory map.
346  * arg == addr of xen_memory_map_t.
347  */
348 #define XENMEM_machine_memory_map   10
349 
350 /*
351  * Set the pseudo-physical memory map of a domain, as returned by
352  * XENMEM_memory_map.
353  * arg == addr of xen_foreign_memory_map_t.
354  */
355 #define XENMEM_set_memory_map       13
356 struct xen_foreign_memory_map {
357     domid_t domid;
358     struct xen_memory_map map;
359 };
360 typedef struct xen_foreign_memory_map xen_foreign_memory_map_t;
361 DEFINE_XEN_GUEST_HANDLE(xen_foreign_memory_map_t);
362 
363 #define XENMEM_set_pod_target       16
364 #define XENMEM_get_pod_target       17
365 struct xen_pod_target {
366     /* IN */
367     uint64_t target_pages;
368     /* OUT */
369     uint64_t tot_pages;
370     uint64_t pod_cache_pages;
371     uint64_t pod_entries;
372     /* IN */
373     domid_t domid;
374 };
375 typedef struct xen_pod_target xen_pod_target_t;
376 
377 #if defined(__XEN__) || defined(__XEN_TOOLS__)
378 
379 #ifndef uint64_aligned_t
380 #define uint64_aligned_t uint64_t
381 #endif
382 
383 /*
384  * Get the number of MFNs saved through memory sharing.
385  * The call never fails.
386  */
387 #define XENMEM_get_sharing_freed_pages    18
388 #define XENMEM_get_sharing_shared_pages   19
389 
390 #define XENMEM_paging_op                    20
391 #define XENMEM_paging_op_nominate           0
392 #define XENMEM_paging_op_evict              1
393 #define XENMEM_paging_op_prep               2
394 
395 struct xen_mem_paging_op {
396     uint8_t     op;         /* XENMEM_paging_op_* */
397     domid_t     domain;
398 
399     /* PAGING_PREP IN: buffer to immediately fill page in */
400     uint64_aligned_t    buffer;
401     /* Other OPs */
402     uint64_aligned_t    gfn;           /* IN:  gfn of page being operated on */
403 };
404 typedef struct xen_mem_paging_op xen_mem_paging_op_t;
405 DEFINE_XEN_GUEST_HANDLE(xen_mem_paging_op_t);
406 
407 #define XENMEM_access_op                    21
408 #define XENMEM_access_op_set_access         0
409 #define XENMEM_access_op_get_access         1
410 /*
411  * XENMEM_access_op_enable_emulate and XENMEM_access_op_disable_emulate are
412  * currently unused, but since they have been in use please do not reuse them.
413  *
414  * #define XENMEM_access_op_enable_emulate     2
415  * #define XENMEM_access_op_disable_emulate    3
416  */
417 #define XENMEM_access_op_set_access_multi   4
418 
419 typedef enum {
420     XENMEM_access_n,
421     XENMEM_access_r,
422     XENMEM_access_w,
423     XENMEM_access_rw,
424     XENMEM_access_x,
425     XENMEM_access_rx,
426     XENMEM_access_wx,
427     XENMEM_access_rwx,
428     /*
429      * Page starts off as r-x, but automatically
430      * change to r-w on a write
431      */
432     XENMEM_access_rx2rw,
433     /*
434      * Log access: starts off as n, automatically
435      * goes to rwx, generating an event without
436      * pausing the vcpu
437      */
438     XENMEM_access_n2rwx,
439     /* Take the domain default */
440     XENMEM_access_default
441 } xenmem_access_t;
442 
443 struct xen_mem_access_op {
444     /* XENMEM_access_op_* */
445     uint8_t op;
446     /* xenmem_access_t */
447     uint8_t access;
448     domid_t domid;
449     /*
450      * Number of pages for set op (or size of pfn_list for
451      * XENMEM_access_op_set_access_multi)
452      * Ignored on setting default access and other ops
453      */
454     uint32_t nr;
455     /*
456      * First pfn for set op
457      * pfn for get op
458      * ~0ull is used to set and get the default access for pages
459      */
460     uint64_aligned_t pfn;
461     /*
462      * List of pfns to set access for
463      * Used only with XENMEM_access_op_set_access_multi
464      */
465     XEN_GUEST_HANDLE(const_uint64) pfn_list;
466     /*
467      * Corresponding list of access settings for pfn_list
468      * Used only with XENMEM_access_op_set_access_multi
469      */
470     XEN_GUEST_HANDLE(const_uint8) access_list;
471 };
472 typedef struct xen_mem_access_op xen_mem_access_op_t;
473 DEFINE_XEN_GUEST_HANDLE(xen_mem_access_op_t);
474 
475 #define XENMEM_sharing_op                   22
476 #define XENMEM_sharing_op_nominate_gfn      0
477 #define XENMEM_sharing_op_nominate_gref     1
478 #define XENMEM_sharing_op_share             2
479 #define XENMEM_sharing_op_debug_gfn         3
480 #define XENMEM_sharing_op_debug_mfn         4
481 #define XENMEM_sharing_op_debug_gref        5
482 #define XENMEM_sharing_op_add_physmap       6
483 #define XENMEM_sharing_op_audit             7
484 #define XENMEM_sharing_op_range_share       8
485 
486 #define XENMEM_SHARING_OP_S_HANDLE_INVALID  (-10)
487 #define XENMEM_SHARING_OP_C_HANDLE_INVALID  (-9)
488 
489 /* The following allows sharing of grant refs. This is useful
490  * for sharing utilities sitting as "filters" in IO backends
491  * (e.g. memshr + blktap(2)). The IO backend is only exposed
492  * to grant references, and this allows sharing of the grefs */
493 #define XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG   (xen_mk_ullong(1) << 62)
494 
495 #define XENMEM_SHARING_OP_FIELD_MAKE_GREF(field, val)  \
496     (field) = (XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG | val)
497 #define XENMEM_SHARING_OP_FIELD_IS_GREF(field)         \
498     ((field) & XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG)
499 #define XENMEM_SHARING_OP_FIELD_GET_GREF(field)        \
500     ((field) & (~XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG))
501 
502 struct xen_mem_sharing_op {
503     uint8_t     op;     /* XENMEM_sharing_op_* */
504     domid_t     domain;
505 
506     union {
507         struct mem_sharing_op_nominate {  /* OP_NOMINATE_xxx           */
508             union {
509                 uint64_aligned_t gfn;     /* IN: gfn to nominate       */
510                 uint32_t      grant_ref;  /* IN: grant ref to nominate */
511             } u;
512             uint64_aligned_t  handle;     /* OUT: the handle           */
513         } nominate;
514         struct mem_sharing_op_share {     /* OP_SHARE/ADD_PHYSMAP */
515             uint64_aligned_t source_gfn;    /* IN: the gfn of the source page */
516             uint64_aligned_t source_handle; /* IN: handle to the source page */
517             uint64_aligned_t client_gfn;    /* IN: the client gfn */
518             uint64_aligned_t client_handle; /* IN: handle to the client page */
519             domid_t  client_domain; /* IN: the client domain id */
520         } share;
521         struct mem_sharing_op_range {         /* OP_RANGE_SHARE */
522             uint64_aligned_t first_gfn;      /* IN: the first gfn */
523             uint64_aligned_t last_gfn;       /* IN: the last gfn */
524             uint64_aligned_t opaque;         /* Must be set to 0 */
525             domid_t client_domain;           /* IN: the client domain id */
526             uint16_t _pad[3];                /* Must be set to 0 */
527         } range;
528         struct mem_sharing_op_debug {     /* OP_DEBUG_xxx */
529             union {
530                 uint64_aligned_t gfn;      /* IN: gfn to debug          */
531                 uint64_aligned_t mfn;      /* IN: mfn to debug          */
532                 uint32_t gref;     /* IN: gref to debug         */
533             } u;
534         } debug;
535     } u;
536 };
537 typedef struct xen_mem_sharing_op xen_mem_sharing_op_t;
538 DEFINE_XEN_GUEST_HANDLE(xen_mem_sharing_op_t);
539 
540 /*
541  * Attempt to stake a claim for a domain on a quantity of pages
542  * of system RAM, but _not_ assign specific pageframes.  Only
543  * arithmetic is performed so the hypercall is very fast and need
544  * not be preemptible, thus sidestepping time-of-check-time-of-use
545  * races for memory allocation.  Returns 0 if the hypervisor page
546  * allocator has atomically and successfully claimed the requested
547  * number of pages, else non-zero.
548  *
549  * Any domain may have only one active claim.  When sufficient memory
550  * has been allocated to resolve the claim, the claim silently expires.
551  * Claiming zero pages effectively resets any outstanding claim and
552  * is always successful.
553  *
554  * Note that a valid claim may be staked even after memory has been
555  * allocated for a domain.  In this case, the claim is not incremental,
556  * i.e. if the domain's tot_pages is 3, and a claim is staked for 10,
557  * only 7 additional pages are claimed.
558  *
559  * Caller must be privileged or the hypercall fails.
560  */
561 #define XENMEM_claim_pages                  24
562 
563 /*
564  * XENMEM_claim_pages flags - the are no flags at this time.
565  * The zero value is appropriate.
566  */
567 
568 /*
569  * With some legacy devices, certain guest-physical addresses cannot safely
570  * be used for other purposes, e.g. to map guest RAM.  This hypercall
571  * enumerates those regions so the toolstack can avoid using them.
572  */
573 #define XENMEM_reserved_device_memory_map   27
574 struct xen_reserved_device_memory {
575     xen_pfn_t start_pfn;
576     xen_ulong_t nr_pages;
577 };
578 typedef struct xen_reserved_device_memory xen_reserved_device_memory_t;
579 DEFINE_XEN_GUEST_HANDLE(xen_reserved_device_memory_t);
580 
581 struct xen_reserved_device_memory_map {
582 #define XENMEM_RDM_ALL 1 /* Request all regions (ignore dev union). */
583     /* IN */
584     uint32_t flags;
585     /*
586      * IN/OUT
587      *
588      * Gets set to the required number of entries when too low,
589      * signaled by error code -ERANGE.
590      */
591     unsigned int nr_entries;
592     /* OUT */
593     XEN_GUEST_HANDLE(xen_reserved_device_memory_t) buffer;
594     /* IN */
595     union {
596         struct physdev_pci_device pci;
597     } dev;
598 };
599 typedef struct xen_reserved_device_memory_map xen_reserved_device_memory_map_t;
600 DEFINE_XEN_GUEST_HANDLE(xen_reserved_device_memory_map_t);
601 
602 #endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */
603 
604 /*
605  * XENMEM_get_vnumainfo used by guest to get
606  * vNUMA topology from hypervisor.
607  */
608 #define XENMEM_get_vnumainfo                26
609 
610 /* vNUMA node memory ranges */
611 struct xen_vmemrange {
612     uint64_t start, end;
613     unsigned int flags;
614     unsigned int nid;
615 };
616 typedef struct xen_vmemrange xen_vmemrange_t;
617 DEFINE_XEN_GUEST_HANDLE(xen_vmemrange_t);
618 
619 /*
620  * vNUMA topology specifies vNUMA node number, distance table,
621  * memory ranges and vcpu mapping provided for guests.
622  * XENMEM_get_vnumainfo hypercall expects to see from guest
623  * nr_vnodes, nr_vmemranges and nr_vcpus to indicate available memory.
624  * After filling guests structures, nr_vnodes, nr_vmemranges and nr_vcpus
625  * copied back to guest. Domain returns expected values of nr_vnodes,
626  * nr_vmemranges and nr_vcpus to guest if the values where incorrect.
627  */
628 struct xen_vnuma_topology_info {
629     /* IN */
630     domid_t domid;
631     uint16_t pad;
632     /* IN/OUT */
633     unsigned int nr_vnodes;
634     unsigned int nr_vcpus;
635     unsigned int nr_vmemranges;
636     /* OUT */
637     union {
638         XEN_GUEST_HANDLE(uint) h;
639         uint64_t pad;
640     } vdistance;
641     union {
642         XEN_GUEST_HANDLE(uint) h;
643         uint64_t pad;
644     } vcpu_to_vnode;
645     union {
646         XEN_GUEST_HANDLE(xen_vmemrange_t) h;
647         uint64_t pad;
648     } vmemrange;
649 };
650 typedef struct xen_vnuma_topology_info xen_vnuma_topology_info_t;
651 DEFINE_XEN_GUEST_HANDLE(xen_vnuma_topology_info_t);
652 
653 /* Next available subop number is 28 */
654 
655 #endif /* __XEN_PUBLIC_MEMORY_H__ */
656 
657 /*
658  * Local variables:
659  * mode: C
660  * c-file-style: "BSD"
661  * c-basic-offset: 4
662  * tab-width: 4
663  * indent-tabs-mode: nil
664  * End:
665  */
666