1 /* SPDX-License-Identifier: MIT */ 1 /* SPDX-License-Identifier: MIT */
2 /********************************************* 2 /******************************************************************************
3 * memory.h 3 * memory.h
4 * 4 *
5 * Memory reservation and information. 5 * Memory reservation and information.
6 * 6 *
7 * Copyright (c) 2005, Keir Fraser <keir@xenso 7 * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
8 */ 8 */
9 9
10 #ifndef __XEN_PUBLIC_MEMORY_H__ 10 #ifndef __XEN_PUBLIC_MEMORY_H__
11 #define __XEN_PUBLIC_MEMORY_H__ 11 #define __XEN_PUBLIC_MEMORY_H__
12 12
13 #include <linux/spinlock.h> 13 #include <linux/spinlock.h>
14 14
15 /* 15 /*
16 * Increase or decrease the specified domain's 16 * Increase or decrease the specified domain's memory reservation. Returns a
17 * -ve errcode on failure, or the # extents su 17 * -ve errcode on failure, or the # extents successfully allocated or freed.
18 * arg == addr of struct xen_memory_reservatio 18 * arg == addr of struct xen_memory_reservation.
19 */ 19 */
20 #define XENMEM_increase_reservation 0 20 #define XENMEM_increase_reservation 0
21 #define XENMEM_decrease_reservation 1 21 #define XENMEM_decrease_reservation 1
22 #define XENMEM_populate_physmap 6 22 #define XENMEM_populate_physmap 6
23 struct xen_memory_reservation { 23 struct xen_memory_reservation {
24 24
25 /* 25 /*
26 * XENMEM_increase_reservation: 26 * XENMEM_increase_reservation:
27 * OUT: MFN (*not* GMFN) bases of extent 27 * OUT: MFN (*not* GMFN) bases of extents that were allocated
28 * XENMEM_decrease_reservation: 28 * XENMEM_decrease_reservation:
29 * IN: GMFN bases of extents to free 29 * IN: GMFN bases of extents to free
30 * XENMEM_populate_physmap: 30 * XENMEM_populate_physmap:
31 * IN: GPFN bases of extents to populat 31 * IN: GPFN bases of extents to populate with memory
32 * OUT: GMFN bases of extents that were 32 * OUT: GMFN bases of extents that were allocated
33 * (NB. This command also updates the ma 33 * (NB. This command also updates the mach_to_phys translation table)
34 */ 34 */
35 GUEST_HANDLE(xen_pfn_t) extent_start; 35 GUEST_HANDLE(xen_pfn_t) extent_start;
36 36
37 /* Number of extents, and size/alignment o 37 /* Number of extents, and size/alignment of each (2^extent_order pages). */
38 xen_ulong_t nr_extents; 38 xen_ulong_t nr_extents;
39 unsigned int extent_order; 39 unsigned int extent_order;
40 40
41 /* 41 /*
42 * Maximum # bits addressable by the user 42 * Maximum # bits addressable by the user of the allocated region (e.g.,
43 * I/O devices often have a 32-bit limitat 43 * I/O devices often have a 32-bit limitation even in 64-bit systems). If
44 * zero then the user has no addressing re 44 * zero then the user has no addressing restriction.
45 * This field is not used by XENMEM_decrea 45 * This field is not used by XENMEM_decrease_reservation.
46 */ 46 */
47 unsigned int address_bits; 47 unsigned int address_bits;
48 48
49 /* 49 /*
50 * Domain whose reservation is being chang 50 * Domain whose reservation is being changed.
51 * Unprivileged domains can specify only D 51 * Unprivileged domains can specify only DOMID_SELF.
52 */ 52 */
53 domid_t domid; 53 domid_t domid;
54 54
55 }; 55 };
56 DEFINE_GUEST_HANDLE_STRUCT(xen_memory_reservat 56 DEFINE_GUEST_HANDLE_STRUCT(xen_memory_reservation);
57 57
58 /* 58 /*
59 * An atomic exchange of memory pages. If retu 59 * An atomic exchange of memory pages. If return code is zero then
60 * @out.extent_list provides GMFNs of the newl 60 * @out.extent_list provides GMFNs of the newly-allocated memory.
61 * Returns zero on complete success, otherwise 61 * Returns zero on complete success, otherwise a negative error code.
62 * On complete success then always @nr_exchang 62 * On complete success then always @nr_exchanged == @in.nr_extents.
63 * On partial success @nr_exchanged indicates 63 * On partial success @nr_exchanged indicates how much work was done.
64 */ 64 */
65 #define XENMEM_exchange 11 65 #define XENMEM_exchange 11
66 struct xen_memory_exchange { 66 struct xen_memory_exchange {
67 /* 67 /*
68 * [IN] Details of memory extents to be ex 68 * [IN] Details of memory extents to be exchanged (GMFN bases).
69 * Note that @in.address_bits is ignored a 69 * Note that @in.address_bits is ignored and unused.
70 */ 70 */
71 struct xen_memory_reservation in; 71 struct xen_memory_reservation in;
72 72
73 /* 73 /*
74 * [IN/OUT] Details of new memory extents. 74 * [IN/OUT] Details of new memory extents.
75 * We require that: 75 * We require that:
76 * 1. @in.domid == @out.domid 76 * 1. @in.domid == @out.domid
77 * 2. @in.nr_extents << @in.extent_order 77 * 2. @in.nr_extents << @in.extent_order ==
78 * @out.nr_extents << @out.extent_orde 78 * @out.nr_extents << @out.extent_order
79 * 3. @in.extent_start and @out.extent_st 79 * 3. @in.extent_start and @out.extent_start lists must not overlap
80 * 4. @out.extent_start lists GPFN bases 80 * 4. @out.extent_start lists GPFN bases to be populated
81 * 5. @out.extent_start is overwritten wi 81 * 5. @out.extent_start is overwritten with allocated GMFN bases
82 */ 82 */
83 struct xen_memory_reservation out; 83 struct xen_memory_reservation out;
84 84
85 /* 85 /*
86 * [OUT] Number of input extents that were 86 * [OUT] Number of input extents that were successfully exchanged:
87 * 1. The first @nr_exchanged input exten 87 * 1. The first @nr_exchanged input extents were successfully
88 * deallocated. 88 * deallocated.
89 * 2. The corresponding first entries in 89 * 2. The corresponding first entries in the output extent list correctly
90 * indicate the GMFNs that were succes 90 * indicate the GMFNs that were successfully exchanged.
91 * 3. All other input and output extents 91 * 3. All other input and output extents are untouched.
92 * 4. If not all input exents are exchang 92 * 4. If not all input exents are exchanged then the return code of this
93 * command will be non-zero. 93 * command will be non-zero.
94 * 5. THIS FIELD MUST BE INITIALISED TO Z 94 * 5. THIS FIELD MUST BE INITIALISED TO ZERO BY THE CALLER!
95 */ 95 */
96 xen_ulong_t nr_exchanged; 96 xen_ulong_t nr_exchanged;
97 }; 97 };
98 98
99 DEFINE_GUEST_HANDLE_STRUCT(xen_memory_exchange 99 DEFINE_GUEST_HANDLE_STRUCT(xen_memory_exchange);
100 /* 100 /*
101 * Returns the maximum machine frame number of 101 * Returns the maximum machine frame number of mapped RAM in this system.
102 * This command always succeeds (it never retu 102 * This command always succeeds (it never returns an error code).
103 * arg == NULL. 103 * arg == NULL.
104 */ 104 */
105 #define XENMEM_maximum_ram_page 2 105 #define XENMEM_maximum_ram_page 2
106 106
107 /* 107 /*
108 * Returns the current or maximum memory reser 108 * Returns the current or maximum memory reservation, in pages, of the
109 * specified domain (may be DOMID_SELF). Retur 109 * specified domain (may be DOMID_SELF). Returns -ve errcode on failure.
110 * arg == addr of domid_t. 110 * arg == addr of domid_t.
111 */ 111 */
112 #define XENMEM_current_reservation 3 112 #define XENMEM_current_reservation 3
113 #define XENMEM_maximum_reservation 4 113 #define XENMEM_maximum_reservation 4
114 114
115 /* 115 /*
116 * Returns a list of MFN bases of 2MB extents 116 * Returns a list of MFN bases of 2MB extents comprising the machine_to_phys
117 * mapping table. Architectures which do not h 117 * mapping table. Architectures which do not have a m2p table do not implement
118 * this command. 118 * this command.
119 * arg == addr of xen_machphys_mfn_list_t. 119 * arg == addr of xen_machphys_mfn_list_t.
120 */ 120 */
121 #define XENMEM_machphys_mfn_list 5 121 #define XENMEM_machphys_mfn_list 5
122 struct xen_machphys_mfn_list { 122 struct xen_machphys_mfn_list {
123 /* 123 /*
124 * Size of the 'extent_start' array. Fewer 124 * Size of the 'extent_start' array. Fewer entries will be filled if the
125 * machphys table is smaller than max_exte 125 * machphys table is smaller than max_extents * 2MB.
126 */ 126 */
127 unsigned int max_extents; 127 unsigned int max_extents;
128 128
129 /* 129 /*
130 * Pointer to buffer to fill with list of 130 * Pointer to buffer to fill with list of extent starts. If there are
131 * any large discontiguities in the machin 131 * any large discontiguities in the machine address space, 2MB gaps in
132 * the machphys table will be represented 132 * the machphys table will be represented by an MFN base of zero.
133 */ 133 */
134 GUEST_HANDLE(xen_pfn_t) extent_start; 134 GUEST_HANDLE(xen_pfn_t) extent_start;
135 135
136 /* 136 /*
137 * Number of extents written to the above 137 * Number of extents written to the above array. This will be smaller
138 * than 'max_extents' if the machphys tabl 138 * than 'max_extents' if the machphys table is smaller than max_e * 2MB.
139 */ 139 */
140 unsigned int nr_extents; 140 unsigned int nr_extents;
141 }; 141 };
142 DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_li 142 DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list);
143 143
144 /* 144 /*
145 * Returns the location in virtual address spa 145 * Returns the location in virtual address space of the machine_to_phys
146 * mapping table. Architectures which do not h 146 * mapping table. Architectures which do not have a m2p table, or which do not
147 * map it by default into guest address space, 147 * map it by default into guest address space, do not implement this command.
148 * arg == addr of xen_machphys_mapping_t. 148 * arg == addr of xen_machphys_mapping_t.
149 */ 149 */
150 #define XENMEM_machphys_mapping 12 150 #define XENMEM_machphys_mapping 12
151 struct xen_machphys_mapping { 151 struct xen_machphys_mapping {
152 xen_ulong_t v_start, v_end; /* Start and e 152 xen_ulong_t v_start, v_end; /* Start and end virtual addresses. */
153 xen_ulong_t max_mfn; /* Maximum MFN 153 xen_ulong_t max_mfn; /* Maximum MFN that can be looked up. */
154 }; 154 };
155 DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mappin 155 DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t);
156 156
157 #define XENMAPSPACE_shared_info 0 /* shared i 157 #define XENMAPSPACE_shared_info 0 /* shared info page */
158 #define XENMAPSPACE_grant_table 1 /* grant ta 158 #define XENMAPSPACE_grant_table 1 /* grant table page */
159 #define XENMAPSPACE_gmfn 2 /* GMFN */ 159 #define XENMAPSPACE_gmfn 2 /* GMFN */
160 #define XENMAPSPACE_gmfn_range 3 /* GMFN ran 160 #define XENMAPSPACE_gmfn_range 3 /* GMFN range, XENMEM_add_to_physmap only. */
161 #define XENMAPSPACE_gmfn_foreign 4 /* GMFN fro 161 #define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
162 * XENMEM_a 162 * XENMEM_add_to_physmap_range only.
163 */ 163 */
164 #define XENMAPSPACE_dev_mmio 5 /* device m 164 #define XENMAPSPACE_dev_mmio 5 /* device mmio region */
165 165
166 /* 166 /*
167 * Sets the GPFN at which a particular page ap 167 * Sets the GPFN at which a particular page appears in the specified guest's
168 * pseudophysical address space. 168 * pseudophysical address space.
169 * arg == addr of xen_add_to_physmap_t. 169 * arg == addr of xen_add_to_physmap_t.
170 */ 170 */
171 #define XENMEM_add_to_physmap 7 171 #define XENMEM_add_to_physmap 7
172 struct xen_add_to_physmap { 172 struct xen_add_to_physmap {
173 /* Which domain to change the mapping for. 173 /* Which domain to change the mapping for. */
174 domid_t domid; 174 domid_t domid;
175 175
176 /* Number of pages to go through for gmfn_ 176 /* Number of pages to go through for gmfn_range */
177 uint16_t size; 177 uint16_t size;
178 178
179 /* Source mapping space. */ 179 /* Source mapping space. */
180 unsigned int space; 180 unsigned int space;
181 181
182 /* Index into source mapping space. */ 182 /* Index into source mapping space. */
183 xen_ulong_t idx; 183 xen_ulong_t idx;
184 184
185 /* GPFN where the source mapping page shou 185 /* GPFN where the source mapping page should appear. */
186 xen_pfn_t gpfn; 186 xen_pfn_t gpfn;
187 }; 187 };
188 DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap) 188 DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
189 189
190 /*** REMOVED ***/ 190 /*** REMOVED ***/
191 /*#define XENMEM_translate_gpfn_list 8*/ 191 /*#define XENMEM_translate_gpfn_list 8*/
192 192
193 #define XENMEM_add_to_physmap_range 23 193 #define XENMEM_add_to_physmap_range 23
194 struct xen_add_to_physmap_range { 194 struct xen_add_to_physmap_range {
195 /* IN */ 195 /* IN */
196 /* Which domain to change the mapping for. 196 /* Which domain to change the mapping for. */
197 domid_t domid; 197 domid_t domid;
198 uint16_t space; /* => enum phys_map_space 198 uint16_t space; /* => enum phys_map_space */
199 199
200 /* Number of pages to go through */ 200 /* Number of pages to go through */
201 uint16_t size; 201 uint16_t size;
202 domid_t foreign_domid; /* IFF gmfn_foreign 202 domid_t foreign_domid; /* IFF gmfn_foreign */
203 203
204 /* Indexes into space being mapped. */ 204 /* Indexes into space being mapped. */
205 GUEST_HANDLE(xen_ulong_t) idxs; 205 GUEST_HANDLE(xen_ulong_t) idxs;
206 206
207 /* GPFN in domid where the source mapping 207 /* GPFN in domid where the source mapping page should appear. */
208 GUEST_HANDLE(xen_pfn_t) gpfns; 208 GUEST_HANDLE(xen_pfn_t) gpfns;
209 209
210 /* OUT */ 210 /* OUT */
211 211
212 /* Per index error code. */ 212 /* Per index error code. */
213 GUEST_HANDLE(int) errs; 213 GUEST_HANDLE(int) errs;
214 }; 214 };
215 DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap_ 215 DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap_range);
216 216
217 /* 217 /*
218 * Returns the pseudo-physical memory map as i 218 * Returns the pseudo-physical memory map as it was when the domain
219 * was started (specified by XENMEM_set_memory 219 * was started (specified by XENMEM_set_memory_map).
220 * arg == addr of struct xen_memory_map. 220 * arg == addr of struct xen_memory_map.
221 */ 221 */
222 #define XENMEM_memory_map 9 222 #define XENMEM_memory_map 9
223 struct xen_memory_map { 223 struct xen_memory_map {
224 /* 224 /*
225 * On call the number of entries which can 225 * On call the number of entries which can be stored in buffer. On
226 * return the number of entries which have 226 * return the number of entries which have been stored in
227 * buffer. 227 * buffer.
228 */ 228 */
229 unsigned int nr_entries; 229 unsigned int nr_entries;
230 230
231 /* 231 /*
232 * Entries in the buffer are in the same f 232 * Entries in the buffer are in the same format as returned by the
233 * BIOS INT 0x15 EAX=0xE820 call. 233 * BIOS INT 0x15 EAX=0xE820 call.
234 */ 234 */
235 GUEST_HANDLE(void) buffer; 235 GUEST_HANDLE(void) buffer;
236 }; 236 };
237 DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map); 237 DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map);
238 238
239 /* 239 /*
240 * Returns the real physical memory map. Passe 240 * Returns the real physical memory map. Passes the same structure as
241 * XENMEM_memory_map. 241 * XENMEM_memory_map.
242 * arg == addr of struct xen_memory_map. 242 * arg == addr of struct xen_memory_map.
243 */ 243 */
244 #define XENMEM_machine_memory_map 10 244 #define XENMEM_machine_memory_map 10
245 245
246 246
247 /* 247 /*
248 * Unmaps the page appearing at a particular G 248 * Unmaps the page appearing at a particular GPFN from the specified guest's
249 * pseudophysical address space. 249 * pseudophysical address space.
250 * arg == addr of xen_remove_from_physmap_t. 250 * arg == addr of xen_remove_from_physmap_t.
251 */ 251 */
252 #define XENMEM_remove_from_physmap 15 252 #define XENMEM_remove_from_physmap 15
253 struct xen_remove_from_physmap { 253 struct xen_remove_from_physmap {
254 /* Which domain to change the mapping for. 254 /* Which domain to change the mapping for. */
255 domid_t domid; 255 domid_t domid;
256 256
257 /* GPFN of the current mapping of the page 257 /* GPFN of the current mapping of the page. */
258 xen_pfn_t gpfn; 258 xen_pfn_t gpfn;
259 }; 259 };
260 DEFINE_GUEST_HANDLE_STRUCT(xen_remove_from_phy 260 DEFINE_GUEST_HANDLE_STRUCT(xen_remove_from_physmap);
261 261
262 /* 262 /*
263 * Get the pages for a particular guest resour 263 * Get the pages for a particular guest resource, so that they can be
264 * mapped directly by a tools domain. 264 * mapped directly by a tools domain.
265 */ 265 */
266 #define XENMEM_acquire_resource 28 266 #define XENMEM_acquire_resource 28
267 struct xen_mem_acquire_resource { 267 struct xen_mem_acquire_resource {
268 /* IN - The domain whose resource is to be 268 /* IN - The domain whose resource is to be mapped */
269 domid_t domid; 269 domid_t domid;
270 /* IN - the type of resource */ 270 /* IN - the type of resource */
271 uint16_t type; 271 uint16_t type;
272 272
273 #define XENMEM_resource_ioreq_server 0 273 #define XENMEM_resource_ioreq_server 0
274 #define XENMEM_resource_grant_table 1 274 #define XENMEM_resource_grant_table 1
275 275
276 /* 276 /*
277 * IN - a type-specific resource identifie 277 * IN - a type-specific resource identifier, which must be zero
278 * unless stated otherwise. 278 * unless stated otherwise.
279 * 279 *
280 * type == XENMEM_resource_ioreq_server -> 280 * type == XENMEM_resource_ioreq_server -> id == ioreq server id
281 * type == XENMEM_resource_grant_table -> 281 * type == XENMEM_resource_grant_table -> id defined below
282 */ 282 */
283 uint32_t id; 283 uint32_t id;
284 284
285 #define XENMEM_resource_grant_table_id_shared 285 #define XENMEM_resource_grant_table_id_shared 0
286 #define XENMEM_resource_grant_table_id_status 286 #define XENMEM_resource_grant_table_id_status 1
287 287
288 /* IN/OUT - As an IN parameter number of f 288 /* IN/OUT - As an IN parameter number of frames of the resource
289 * to be mapped. However, if the 289 * to be mapped. However, if the specified value is 0 and
290 * frame_list is NULL then this f 290 * frame_list is NULL then this field will be set to the
291 * maximum value supported by the 291 * maximum value supported by the implementation on return.
292 */ 292 */
293 uint32_t nr_frames; 293 uint32_t nr_frames;
294 /* 294 /*
295 * OUT - Must be zero on entry. On return 295 * OUT - Must be zero on entry. On return this may contain a bitwise
296 * OR of the following values. 296 * OR of the following values.
297 */ 297 */
298 uint32_t flags; 298 uint32_t flags;
299 299
300 /* The resource pages have been assigned t 300 /* The resource pages have been assigned to the calling domain */
301 #define _XENMEM_rsrc_acq_caller_owned 0 301 #define _XENMEM_rsrc_acq_caller_owned 0
302 #define XENMEM_rsrc_acq_caller_owned (1u << _X 302 #define XENMEM_rsrc_acq_caller_owned (1u << _XENMEM_rsrc_acq_caller_owned)
303 303
304 /* 304 /*
305 * IN - the index of the initial frame to 305 * IN - the index of the initial frame to be mapped. This parameter
306 * is ignored if nr_frames is 0. 306 * is ignored if nr_frames is 0.
307 */ 307 */
308 uint64_t frame; 308 uint64_t frame;
309 309
310 #define XENMEM_resource_ioreq_server_frame_buf 310 #define XENMEM_resource_ioreq_server_frame_bufioreq 0
311 #define XENMEM_resource_ioreq_server_frame_ior 311 #define XENMEM_resource_ioreq_server_frame_ioreq(n) (1 + (n))
312 312
313 /* 313 /*
314 * IN/OUT - If the tools domain is PV then 314 * IN/OUT - If the tools domain is PV then, upon return, frame_list
315 * will be populated with the MFN 315 * will be populated with the MFNs of the resource.
316 * If the tools domain is HVM the 316 * If the tools domain is HVM then it is expected that, on
317 * entry, frame_list will be popu 317 * entry, frame_list will be populated with a list of GFNs
318 * that will be mapped to the MFN 318 * that will be mapped to the MFNs of the resource.
319 * If -EIO is returned then the f 319 * If -EIO is returned then the frame_list has only been
320 * partially mapped and it is up 320 * partially mapped and it is up to the caller to unmap all
321 * the GFNs. 321 * the GFNs.
322 * This parameter may be NULL if 322 * This parameter may be NULL if nr_frames is 0.
323 */ 323 */
324 GUEST_HANDLE(xen_pfn_t) frame_list; 324 GUEST_HANDLE(xen_pfn_t) frame_list;
325 }; 325 };
326 DEFINE_GUEST_HANDLE_STRUCT(xen_mem_acquire_res 326 DEFINE_GUEST_HANDLE_STRUCT(xen_mem_acquire_resource);
327 327
328 #endif /* __XEN_PUBLIC_MEMORY_H__ */ 328 #endif /* __XEN_PUBLIC_MEMORY_H__ */
329 329
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