xref: /openbmc/qemu/include/hw/xen/interface/memory.h (revision d2dfe0b5)
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 struct xen_memory_domain {
152     /* [IN] Domain information is being queried for. */
153     domid_t domid;
154 };
155 
156 /*
157  * Returns the current or maximum memory reservation, in pages, of the
158  * specified domain (may be DOMID_SELF). Returns -ve errcode on failure.
159  * arg == addr of struct xen_memory_domain.
160  */
161 #define XENMEM_current_reservation  3
162 #define XENMEM_maximum_reservation  4
163 
164 /*
165  * Returns the maximum GFN in use by the specified domain (may be DOMID_SELF).
166  * Returns -ve errcode on failure.
167  * arg == addr of struct xen_memory_domain.
168  */
169 #define XENMEM_maximum_gpfn         14
170 
171 /*
172  * Returns a list of MFN bases of 2MB extents comprising the machine_to_phys
173  * mapping table. Architectures which do not have a m2p table do not implement
174  * this command.
175  * arg == addr of xen_machphys_mfn_list_t.
176  */
177 #define XENMEM_machphys_mfn_list    5
178 struct xen_machphys_mfn_list {
179     /*
180      * Size of the 'extent_start' array. Fewer entries will be filled if the
181      * machphys table is smaller than max_extents * 2MB.
182      */
183     unsigned int max_extents;
184 
185     /*
186      * Pointer to buffer to fill with list of extent starts. If there are
187      * any large discontiguities in the machine address space, 2MB gaps in
188      * the machphys table will be represented by an MFN base of zero.
189      */
190     XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
191 
192     /*
193      * Number of extents written to the above array. This will be smaller
194      * than 'max_extents' if the machphys table is smaller than max_e * 2MB.
195      */
196     unsigned int nr_extents;
197 };
198 typedef struct xen_machphys_mfn_list xen_machphys_mfn_list_t;
199 DEFINE_XEN_GUEST_HANDLE(xen_machphys_mfn_list_t);
200 
201 /*
202  * For a compat caller, this is identical to XENMEM_machphys_mfn_list.
203  *
204  * For a non compat caller, this functions similarly to
205  * XENMEM_machphys_mfn_list, but returns the mfns making up the compatibility
206  * m2p table.
207  */
208 #define XENMEM_machphys_compat_mfn_list     25
209 
210 /*
211  * Returns the location in virtual address space of the machine_to_phys
212  * mapping table. Architectures which do not have a m2p table, or which do not
213  * map it by default into guest address space, do not implement this command.
214  * arg == addr of xen_machphys_mapping_t.
215  */
216 #define XENMEM_machphys_mapping     12
217 struct xen_machphys_mapping {
218     xen_ulong_t v_start, v_end; /* Start and end virtual addresses.   */
219     xen_ulong_t max_mfn;        /* Maximum MFN that can be looked up. */
220 };
221 typedef struct xen_machphys_mapping xen_machphys_mapping_t;
222 DEFINE_XEN_GUEST_HANDLE(xen_machphys_mapping_t);
223 
224 /* Source mapping space. */
225 /* ` enum phys_map_space { */
226 #define XENMAPSPACE_shared_info  0 /* shared info page */
227 #define XENMAPSPACE_grant_table  1 /* grant table page */
228 #define XENMAPSPACE_gmfn         2 /* GMFN */
229 #define XENMAPSPACE_gmfn_range   3 /* GMFN range, XENMEM_add_to_physmap only. */
230 #define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
231                                     * XENMEM_add_to_physmap_batch only. */
232 #define XENMAPSPACE_dev_mmio     5 /* device mmio region
233                                       ARM only; the region is mapped in
234                                       Stage-2 using the Normal Memory
235                                       Inner/Outer Write-Back Cacheable
236                                       memory attribute. */
237 /* ` } */
238 
239 /*
240  * Sets the GPFN at which a particular page appears in the specified guest's
241  * physical address space (translated guests only).
242  * arg == addr of xen_add_to_physmap_t.
243  */
244 #define XENMEM_add_to_physmap      7
245 struct xen_add_to_physmap {
246     /* Which domain to change the mapping for. */
247     domid_t domid;
248 
249     /* Number of pages to go through for gmfn_range */
250     uint16_t    size;
251 
252     unsigned int space; /* => enum phys_map_space */
253 
254 #define XENMAPIDX_grant_table_status 0x80000000
255 
256     /* Index into space being mapped. */
257     xen_ulong_t idx;
258 
259     /* GPFN in domid where the source mapping page should appear. */
260     xen_pfn_t     gpfn;
261 };
262 typedef struct xen_add_to_physmap xen_add_to_physmap_t;
263 DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
264 
265 /* A batched version of add_to_physmap. */
266 #define XENMEM_add_to_physmap_batch 23
267 struct xen_add_to_physmap_batch {
268     /* IN */
269     /* Which domain to change the mapping for. */
270     domid_t domid;
271     uint16_t space; /* => enum phys_map_space */
272 
273     /* Number of pages to go through */
274     uint16_t size;
275 
276 #if __XEN_INTERFACE_VERSION__ < 0x00040700
277     domid_t foreign_domid; /* IFF gmfn_foreign. Should be 0 for other spaces. */
278 #else
279     union xen_add_to_physmap_batch_extra {
280         domid_t foreign_domid; /* gmfn_foreign */
281         uint16_t res0;  /* All the other spaces. Should be 0 */
282     } u;
283 #endif
284 
285     /* Indexes into space being mapped. */
286     XEN_GUEST_HANDLE(xen_ulong_t) idxs;
287 
288     /* GPFN in domid where the source mapping page should appear. */
289     XEN_GUEST_HANDLE(xen_pfn_t) gpfns;
290 
291     /* OUT */
292 
293     /* Per index error code. */
294     XEN_GUEST_HANDLE(int) errs;
295 };
296 typedef struct xen_add_to_physmap_batch xen_add_to_physmap_batch_t;
297 DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_batch_t);
298 
299 #if __XEN_INTERFACE_VERSION__ < 0x00040400
300 #define XENMEM_add_to_physmap_range XENMEM_add_to_physmap_batch
301 #define xen_add_to_physmap_range xen_add_to_physmap_batch
302 typedef struct xen_add_to_physmap_batch xen_add_to_physmap_range_t;
303 DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_range_t);
304 #endif
305 
306 /*
307  * Unmaps the page appearing at a particular GPFN from the specified guest's
308  * physical address space (translated guests only).
309  * arg == addr of xen_remove_from_physmap_t.
310  */
311 #define XENMEM_remove_from_physmap      15
312 struct xen_remove_from_physmap {
313     /* Which domain to change the mapping for. */
314     domid_t domid;
315 
316     /* GPFN of the current mapping of the page. */
317     xen_pfn_t     gpfn;
318 };
319 typedef struct xen_remove_from_physmap xen_remove_from_physmap_t;
320 DEFINE_XEN_GUEST_HANDLE(xen_remove_from_physmap_t);
321 
322 /*** REMOVED ***/
323 /*#define XENMEM_translate_gpfn_list  8*/
324 
325 /*
326  * Returns the pseudo-physical memory map as it was when the domain
327  * was started (specified by XENMEM_set_memory_map).
328  * arg == addr of xen_memory_map_t.
329  */
330 #define XENMEM_memory_map           9
331 struct xen_memory_map {
332     /*
333      * On call the number of entries which can be stored in buffer. On
334      * return the number of entries which have been stored in
335      * buffer.
336      */
337     unsigned int nr_entries;
338 
339     /*
340      * Entries in the buffer are in the same format as returned by the
341      * BIOS INT 0x15 EAX=0xE820 call.
342      */
343     XEN_GUEST_HANDLE(void) buffer;
344 };
345 typedef struct xen_memory_map xen_memory_map_t;
346 DEFINE_XEN_GUEST_HANDLE(xen_memory_map_t);
347 
348 /*
349  * Returns the real physical memory map. Passes the same structure as
350  * XENMEM_memory_map.
351  * Specifying buffer as NULL will return the number of entries required
352  * to store the complete memory map.
353  * arg == addr of xen_memory_map_t.
354  */
355 #define XENMEM_machine_memory_map   10
356 
357 /*
358  * Set the pseudo-physical memory map of a domain, as returned by
359  * XENMEM_memory_map.
360  * arg == addr of xen_foreign_memory_map_t.
361  */
362 #define XENMEM_set_memory_map       13
363 struct xen_foreign_memory_map {
364     domid_t domid;
365     struct xen_memory_map map;
366 };
367 typedef struct xen_foreign_memory_map xen_foreign_memory_map_t;
368 DEFINE_XEN_GUEST_HANDLE(xen_foreign_memory_map_t);
369 
370 #define XENMEM_set_pod_target       16
371 #define XENMEM_get_pod_target       17
372 struct xen_pod_target {
373     /* IN */
374     uint64_t target_pages;
375     /* OUT */
376     uint64_t tot_pages;
377     uint64_t pod_cache_pages;
378     uint64_t pod_entries;
379     /* IN */
380     domid_t domid;
381 };
382 typedef struct xen_pod_target xen_pod_target_t;
383 
384 #if defined(__XEN__) || defined(__XEN_TOOLS__)
385 
386 #ifndef uint64_aligned_t
387 #define uint64_aligned_t uint64_t
388 #endif
389 
390 /*
391  * Get the number of MFNs saved through memory sharing.
392  * The call never fails.
393  */
394 #define XENMEM_get_sharing_freed_pages    18
395 #define XENMEM_get_sharing_shared_pages   19
396 
397 #define XENMEM_paging_op                    20
398 #define XENMEM_paging_op_nominate           0
399 #define XENMEM_paging_op_evict              1
400 #define XENMEM_paging_op_prep               2
401 
402 struct xen_mem_paging_op {
403     uint8_t     op;         /* XENMEM_paging_op_* */
404     domid_t     domain;
405 
406     /* IN: (XENMEM_paging_op_prep) buffer to immediately fill page from */
407     XEN_GUEST_HANDLE_64(const_uint8) buffer;
408     /* IN:  gfn of page being operated on */
409     uint64_aligned_t    gfn;
410 };
411 typedef struct xen_mem_paging_op xen_mem_paging_op_t;
412 DEFINE_XEN_GUEST_HANDLE(xen_mem_paging_op_t);
413 
414 #define XENMEM_access_op                    21
415 #define XENMEM_access_op_set_access         0
416 #define XENMEM_access_op_get_access         1
417 /*
418  * XENMEM_access_op_enable_emulate and XENMEM_access_op_disable_emulate are
419  * currently unused, but since they have been in use please do not reuse them.
420  *
421  * #define XENMEM_access_op_enable_emulate     2
422  * #define XENMEM_access_op_disable_emulate    3
423  */
424 #define XENMEM_access_op_set_access_multi   4
425 
426 typedef enum {
427     XENMEM_access_n,
428     XENMEM_access_r,
429     XENMEM_access_w,
430     XENMEM_access_rw,
431     XENMEM_access_x,
432     XENMEM_access_rx,
433     XENMEM_access_wx,
434     XENMEM_access_rwx,
435     /*
436      * Page starts off as r-x, but automatically
437      * change to r-w on a write
438      */
439     XENMEM_access_rx2rw,
440     /*
441      * Log access: starts off as n, automatically
442      * goes to rwx, generating an event without
443      * pausing the vcpu
444      */
445     XENMEM_access_n2rwx,
446     /* Take the domain default */
447     XENMEM_access_default
448 } xenmem_access_t;
449 
450 struct xen_mem_access_op {
451     /* XENMEM_access_op_* */
452     uint8_t op;
453     /* xenmem_access_t */
454     uint8_t access;
455     domid_t domid;
456     /*
457      * Number of pages for set op (or size of pfn_list for
458      * XENMEM_access_op_set_access_multi)
459      * Ignored on setting default access and other ops
460      */
461     uint32_t nr;
462     /*
463      * First pfn for set op
464      * pfn for get op
465      * ~0ull is used to set and get the default access for pages
466      */
467     uint64_aligned_t pfn;
468     /*
469      * List of pfns to set access for
470      * Used only with XENMEM_access_op_set_access_multi
471      */
472     XEN_GUEST_HANDLE(const_uint64) pfn_list;
473     /*
474      * Corresponding list of access settings for pfn_list
475      * Used only with XENMEM_access_op_set_access_multi
476      */
477     XEN_GUEST_HANDLE(const_uint8) access_list;
478 };
479 typedef struct xen_mem_access_op xen_mem_access_op_t;
480 DEFINE_XEN_GUEST_HANDLE(xen_mem_access_op_t);
481 
482 #define XENMEM_sharing_op                   22
483 #define XENMEM_sharing_op_nominate_gfn      0
484 #define XENMEM_sharing_op_nominate_gref     1
485 #define XENMEM_sharing_op_share             2
486 #define XENMEM_sharing_op_debug_gfn         3
487 #define XENMEM_sharing_op_debug_mfn         4
488 #define XENMEM_sharing_op_debug_gref        5
489 #define XENMEM_sharing_op_add_physmap       6
490 #define XENMEM_sharing_op_audit             7
491 #define XENMEM_sharing_op_range_share       8
492 #define XENMEM_sharing_op_fork              9
493 #define XENMEM_sharing_op_fork_reset        10
494 
495 #define XENMEM_SHARING_OP_S_HANDLE_INVALID  (-10)
496 #define XENMEM_SHARING_OP_C_HANDLE_INVALID  (-9)
497 
498 /* The following allows sharing of grant refs. This is useful
499  * for sharing utilities sitting as "filters" in IO backends
500  * (e.g. memshr + blktap(2)). The IO backend is only exposed
501  * to grant references, and this allows sharing of the grefs */
502 #define XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG   (xen_mk_ullong(1) << 62)
503 
504 #define XENMEM_SHARING_OP_FIELD_MAKE_GREF(field, val)  \
505     (field) = (XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG | val)
506 #define XENMEM_SHARING_OP_FIELD_IS_GREF(field)         \
507     ((field) & XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG)
508 #define XENMEM_SHARING_OP_FIELD_GET_GREF(field)        \
509     ((field) & (~XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG))
510 
511 struct xen_mem_sharing_op {
512     uint8_t     op;     /* XENMEM_sharing_op_* */
513     domid_t     domain;
514 
515     union {
516         struct mem_sharing_op_nominate {  /* OP_NOMINATE_xxx           */
517             union {
518                 uint64_aligned_t gfn;     /* IN: gfn to nominate       */
519                 uint32_t      grant_ref;  /* IN: grant ref to nominate */
520             } u;
521             uint64_aligned_t  handle;     /* OUT: the handle           */
522         } nominate;
523         struct mem_sharing_op_share {     /* OP_SHARE/ADD_PHYSMAP */
524             uint64_aligned_t source_gfn;    /* IN: the gfn of the source page */
525             uint64_aligned_t source_handle; /* IN: handle to the source page */
526             uint64_aligned_t client_gfn;    /* IN: the client gfn */
527             uint64_aligned_t client_handle; /* IN: handle to the client page */
528             domid_t  client_domain; /* IN: the client domain id */
529         } share;
530         struct mem_sharing_op_range {         /* OP_RANGE_SHARE */
531             uint64_aligned_t first_gfn;      /* IN: the first gfn */
532             uint64_aligned_t last_gfn;       /* IN: the last gfn */
533             uint64_aligned_t opaque;         /* Must be set to 0 */
534             domid_t client_domain;           /* IN: the client domain id */
535             uint16_t _pad[3];                /* Must be set to 0 */
536         } range;
537         struct mem_sharing_op_debug {     /* OP_DEBUG_xxx */
538             union {
539                 uint64_aligned_t gfn;      /* IN: gfn to debug          */
540                 uint64_aligned_t mfn;      /* IN: mfn to debug          */
541                 uint32_t gref;     /* IN: gref to debug         */
542             } u;
543         } debug;
544         struct mem_sharing_op_fork {      /* OP_FORK */
545             domid_t parent_domain;        /* IN: parent's domain id */
546 /* Only makes sense for short-lived forks */
547 #define XENMEM_FORK_WITH_IOMMU_ALLOWED (1u << 0)
548 /* Only makes sense for short-lived forks */
549 #define XENMEM_FORK_BLOCK_INTERRUPTS   (1u << 1)
550             uint16_t flags;               /* IN: optional settings */
551             uint32_t pad;                 /* Must be set to 0 */
552         } fork;
553     } u;
554 };
555 typedef struct xen_mem_sharing_op xen_mem_sharing_op_t;
556 DEFINE_XEN_GUEST_HANDLE(xen_mem_sharing_op_t);
557 
558 /*
559  * Attempt to stake a claim for a domain on a quantity of pages
560  * of system RAM, but _not_ assign specific pageframes.  Only
561  * arithmetic is performed so the hypercall is very fast and need
562  * not be preemptible, thus sidestepping time-of-check-time-of-use
563  * races for memory allocation.  Returns 0 if the hypervisor page
564  * allocator has atomically and successfully claimed the requested
565  * number of pages, else non-zero.
566  *
567  * Any domain may have only one active claim.  When sufficient memory
568  * has been allocated to resolve the claim, the claim silently expires.
569  * Claiming zero pages effectively resets any outstanding claim and
570  * is always successful.
571  *
572  * Note that a valid claim may be staked even after memory has been
573  * allocated for a domain.  In this case, the claim is not incremental,
574  * i.e. if the domain's total page count is 3, and a claim is staked
575  * for 10, only 7 additional pages are claimed.
576  *
577  * Caller must be privileged or the hypercall fails.
578  */
579 #define XENMEM_claim_pages                  24
580 
581 /*
582  * XENMEM_claim_pages flags - the are no flags at this time.
583  * The zero value is appropriate.
584  */
585 
586 /*
587  * With some legacy devices, certain guest-physical addresses cannot safely
588  * be used for other purposes, e.g. to map guest RAM.  This hypercall
589  * enumerates those regions so the toolstack can avoid using them.
590  */
591 #define XENMEM_reserved_device_memory_map   27
592 struct xen_reserved_device_memory {
593     xen_pfn_t start_pfn;
594     xen_ulong_t nr_pages;
595 };
596 typedef struct xen_reserved_device_memory xen_reserved_device_memory_t;
597 DEFINE_XEN_GUEST_HANDLE(xen_reserved_device_memory_t);
598 
599 struct xen_reserved_device_memory_map {
600 #define XENMEM_RDM_ALL 1 /* Request all regions (ignore dev union). */
601     /* IN */
602     uint32_t flags;
603     /*
604      * IN/OUT
605      *
606      * Gets set to the required number of entries when too low,
607      * signaled by error code -ERANGE.
608      */
609     unsigned int nr_entries;
610     /* OUT */
611     XEN_GUEST_HANDLE(xen_reserved_device_memory_t) buffer;
612     /* IN */
613     union {
614         physdev_pci_device_t pci;
615     } dev;
616 };
617 typedef struct xen_reserved_device_memory_map xen_reserved_device_memory_map_t;
618 DEFINE_XEN_GUEST_HANDLE(xen_reserved_device_memory_map_t);
619 
620 #endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */
621 
622 /*
623  * Get the pages for a particular guest resource, so that they can be
624  * mapped directly by a tools domain.
625  */
626 #define XENMEM_acquire_resource 28
627 struct xen_mem_acquire_resource {
628     /* IN - The domain whose resource is to be mapped */
629     domid_t domid;
630     /* IN - the type of resource */
631     uint16_t type;
632 
633 #define XENMEM_resource_ioreq_server 0
634 #define XENMEM_resource_grant_table 1
635 #define XENMEM_resource_vmtrace_buf 2
636 
637     /*
638      * IN - a type-specific resource identifier, which must be zero
639      *      unless stated otherwise.
640      *
641      * type == XENMEM_resource_ioreq_server -> id == ioreq server id
642      * type == XENMEM_resource_grant_table -> id defined below
643      */
644     uint32_t id;
645 
646 #define XENMEM_resource_grant_table_id_shared 0
647 #define XENMEM_resource_grant_table_id_status 1
648 
649     /*
650      * IN/OUT
651      *
652      * As an IN parameter number of frames of the resource to be mapped.
653      * This value may be updated over the course of the operation.
654      *
655      * When frame_list is NULL and nr_frames is 0, this is interpreted as a
656      * request for the size of the resource, which shall be returned in the
657      * nr_frames field.
658      *
659      * The size of a resource will never be zero, but a nonzero result doesn't
660      * guarantee that a subsequent mapping request will be successful.  There
661      * are further type/id specific constraints which may change between the
662      * two calls.
663      */
664     uint32_t nr_frames;
665     uint32_t pad;
666     /*
667      * IN - the index of the initial frame to be mapped. This parameter
668      *      is ignored if nr_frames is 0.  This value may be updated
669      *      over the course of the operation.
670      */
671     uint64_t frame;
672 
673 #define XENMEM_resource_ioreq_server_frame_bufioreq 0
674 #define XENMEM_resource_ioreq_server_frame_ioreq(n) (1 + (n))
675 
676     /*
677      * IN/OUT - If the tools domain is PV then, upon return, frame_list
678      *          will be populated with the MFNs of the resource.
679      *          If the tools domain is HVM then it is expected that, on
680      *          entry, frame_list will be populated with a list of GFNs
681      *          that will be mapped to the MFNs of the resource.
682      *          If -EIO is returned then the frame_list has only been
683      *          partially mapped and it is up to the caller to unmap all
684      *          the GFNs.
685      *          This parameter may be NULL if nr_frames is 0.  This
686      *          value may be updated over the course of the operation.
687      */
688     XEN_GUEST_HANDLE(xen_pfn_t) frame_list;
689 };
690 typedef struct xen_mem_acquire_resource xen_mem_acquire_resource_t;
691 DEFINE_XEN_GUEST_HANDLE(xen_mem_acquire_resource_t);
692 
693 /*
694  * XENMEM_get_vnumainfo used by guest to get
695  * vNUMA topology from hypervisor.
696  */
697 #define XENMEM_get_vnumainfo                26
698 
699 /* vNUMA node memory ranges */
700 struct xen_vmemrange {
701     uint64_t start, end;
702     unsigned int flags;
703     unsigned int nid;
704 };
705 typedef struct xen_vmemrange xen_vmemrange_t;
706 DEFINE_XEN_GUEST_HANDLE(xen_vmemrange_t);
707 
708 /*
709  * vNUMA topology specifies vNUMA node number, distance table,
710  * memory ranges and vcpu mapping provided for guests.
711  * XENMEM_get_vnumainfo hypercall expects to see from guest
712  * nr_vnodes, nr_vmemranges and nr_vcpus to indicate available memory.
713  * After filling guests structures, nr_vnodes, nr_vmemranges and nr_vcpus
714  * copied back to guest. Domain returns expected values of nr_vnodes,
715  * nr_vmemranges and nr_vcpus to guest if the values where incorrect.
716  */
717 struct xen_vnuma_topology_info {
718     /* IN */
719     domid_t domid;
720     uint16_t pad;
721     /* IN/OUT */
722     unsigned int nr_vnodes;
723     unsigned int nr_vcpus;
724     unsigned int nr_vmemranges;
725     /* OUT */
726     union {
727         XEN_GUEST_HANDLE(uint) h;
728         uint64_t pad;
729     } vdistance;
730     union {
731         XEN_GUEST_HANDLE(uint) h;
732         uint64_t pad;
733     } vcpu_to_vnode;
734     union {
735         XEN_GUEST_HANDLE(xen_vmemrange_t) h;
736         uint64_t pad;
737     } vmemrange;
738 };
739 typedef struct xen_vnuma_topology_info xen_vnuma_topology_info_t;
740 DEFINE_XEN_GUEST_HANDLE(xen_vnuma_topology_info_t);
741 
742 /* Next available subop number is 29 */
743 
744 #endif /* __XEN_PUBLIC_MEMORY_H__ */
745 
746 /*
747  * Local variables:
748  * mode: C
749  * c-file-style: "BSD"
750  * c-basic-offset: 4
751  * tab-width: 4
752  * indent-tabs-mode: nil
753  * End:
754  */
755