1 /****************************************************************************** 2 * hypercall.h 3 * 4 * Linux-specific hypervisor handling. 5 * 6 * Copyright (c) 2002-2004, K A Fraser 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License version 2 10 * as published by the Free Software Foundation; or, when distributed 11 * separately from the Linux kernel or incorporated into other 12 * software packages, subject to the following license: 13 * 14 * Permission is hereby granted, free of charge, to any person obtaining a copy 15 * of this source file (the "Software"), to deal in the Software without 16 * restriction, including without limitation the rights to use, copy, modify, 17 * merge, publish, distribute, sublicense, and/or sell copies of the Software, 18 * and to permit persons to whom the Software is furnished to do so, subject to 19 * the following conditions: 20 * 21 * The above copyright notice and this permission notice shall be included in 22 * all copies or substantial portions of the Software. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 27 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 29 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 30 * IN THE SOFTWARE. 31 */ 32 33 #ifndef __HYPERCALL_H__ 34 #define __HYPERCALL_H__ 35 36 #include <linux/errno.h> 37 #include <linux/string.h> 38 39 #include <xen/interface/xen.h> 40 #include <xen/interface/sched.h> 41 #include <xen/interface/physdev.h> 42 43 extern struct { char _entry[32]; } hypercall_page[]; 44 45 #define _hypercall0(type, name) \ 46 ({ \ 47 long __res; \ 48 asm volatile ( \ 49 "call %[call]" \ 50 : "=a" (__res) \ 51 : [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 52 : "memory" ); \ 53 (type)__res; \ 54 }) 55 56 #define _hypercall1(type, name, a1) \ 57 ({ \ 58 long __res, __ign1; \ 59 asm volatile ( \ 60 "call %[call]" \ 61 : "=a" (__res), "=b" (__ign1) \ 62 : "1" ((long)(a1)), \ 63 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 64 : "memory" ); \ 65 (type)__res; \ 66 }) 67 68 #define _hypercall2(type, name, a1, a2) \ 69 ({ \ 70 long __res, __ign1, __ign2; \ 71 asm volatile ( \ 72 "call %[call]" \ 73 : "=a" (__res), "=b" (__ign1), "=c" (__ign2) \ 74 : "1" ((long)(a1)), "2" ((long)(a2)), \ 75 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 76 : "memory" ); \ 77 (type)__res; \ 78 }) 79 80 #define _hypercall3(type, name, a1, a2, a3) \ 81 ({ \ 82 long __res, __ign1, __ign2, __ign3; \ 83 asm volatile ( \ 84 "call %[call]" \ 85 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 86 "=d" (__ign3) \ 87 : "1" ((long)(a1)), "2" ((long)(a2)), \ 88 "3" ((long)(a3)), \ 89 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 90 : "memory" ); \ 91 (type)__res; \ 92 }) 93 94 #define _hypercall4(type, name, a1, a2, a3, a4) \ 95 ({ \ 96 long __res, __ign1, __ign2, __ign3, __ign4; \ 97 asm volatile ( \ 98 "call %[call]" \ 99 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 100 "=d" (__ign3), "=S" (__ign4) \ 101 : "1" ((long)(a1)), "2" ((long)(a2)), \ 102 "3" ((long)(a3)), "4" ((long)(a4)), \ 103 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 104 : "memory" ); \ 105 (type)__res; \ 106 }) 107 108 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \ 109 ({ \ 110 long __res, __ign1, __ign2, __ign3, __ign4, __ign5; \ 111 asm volatile ( \ 112 "call %[call]" \ 113 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 114 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \ 115 : "1" ((long)(a1)), "2" ((long)(a2)), \ 116 "3" ((long)(a3)), "4" ((long)(a4)), \ 117 "5" ((long)(a5)), \ 118 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 119 : "memory" ); \ 120 (type)__res; \ 121 }) 122 123 static inline int 124 HYPERVISOR_set_trap_table(struct trap_info *table) 125 { 126 return _hypercall1(int, set_trap_table, table); 127 } 128 129 static inline int 130 HYPERVISOR_mmu_update(struct mmu_update *req, int count, 131 int *success_count, domid_t domid) 132 { 133 return _hypercall4(int, mmu_update, req, count, success_count, domid); 134 } 135 136 static inline int 137 HYPERVISOR_mmuext_op(struct mmuext_op *op, int count, 138 int *success_count, domid_t domid) 139 { 140 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 141 } 142 143 static inline int 144 HYPERVISOR_set_gdt(unsigned long *frame_list, int entries) 145 { 146 return _hypercall2(int, set_gdt, frame_list, entries); 147 } 148 149 static inline int 150 HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp) 151 { 152 return _hypercall2(int, stack_switch, ss, esp); 153 } 154 155 static inline int 156 HYPERVISOR_set_callbacks(unsigned long event_selector, 157 unsigned long event_address, 158 unsigned long failsafe_selector, 159 unsigned long failsafe_address) 160 { 161 return _hypercall4(int, set_callbacks, 162 event_selector, event_address, 163 failsafe_selector, failsafe_address); 164 } 165 166 static inline int 167 HYPERVISOR_fpu_taskswitch(int set) 168 { 169 return _hypercall1(int, fpu_taskswitch, set); 170 } 171 172 static inline int 173 HYPERVISOR_sched_op(int cmd, unsigned long arg) 174 { 175 return _hypercall2(int, sched_op, cmd, arg); 176 } 177 178 static inline long 179 HYPERVISOR_set_timer_op(u64 timeout) 180 { 181 unsigned long timeout_hi = (unsigned long)(timeout>>32); 182 unsigned long timeout_lo = (unsigned long)timeout; 183 return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi); 184 } 185 186 static inline int 187 HYPERVISOR_set_debugreg(int reg, unsigned long value) 188 { 189 return _hypercall2(int, set_debugreg, reg, value); 190 } 191 192 static inline unsigned long 193 HYPERVISOR_get_debugreg(int reg) 194 { 195 return _hypercall1(unsigned long, get_debugreg, reg); 196 } 197 198 static inline int 199 HYPERVISOR_update_descriptor(u64 ma, u64 desc) 200 { 201 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32); 202 } 203 204 static inline int 205 HYPERVISOR_memory_op(unsigned int cmd, void *arg) 206 { 207 return _hypercall2(int, memory_op, cmd, arg); 208 } 209 210 static inline int 211 HYPERVISOR_multicall(void *call_list, int nr_calls) 212 { 213 return _hypercall2(int, multicall, call_list, nr_calls); 214 } 215 216 static inline int 217 HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val, 218 unsigned long flags) 219 { 220 unsigned long pte_hi = 0; 221 #ifdef CONFIG_X86_PAE 222 pte_hi = new_val.pte_high; 223 #endif 224 return _hypercall4(int, update_va_mapping, va, 225 new_val.pte_low, pte_hi, flags); 226 } 227 228 static inline int 229 HYPERVISOR_event_channel_op(int cmd, void *arg) 230 { 231 int rc = _hypercall2(int, event_channel_op, cmd, arg); 232 if (unlikely(rc == -ENOSYS)) { 233 struct evtchn_op op; 234 op.cmd = cmd; 235 memcpy(&op.u, arg, sizeof(op.u)); 236 rc = _hypercall1(int, event_channel_op_compat, &op); 237 memcpy(arg, &op.u, sizeof(op.u)); 238 } 239 return rc; 240 } 241 242 static inline int 243 HYPERVISOR_xen_version(int cmd, void *arg) 244 { 245 return _hypercall2(int, xen_version, cmd, arg); 246 } 247 248 static inline int 249 HYPERVISOR_console_io(int cmd, int count, char *str) 250 { 251 return _hypercall3(int, console_io, cmd, count, str); 252 } 253 254 static inline int 255 HYPERVISOR_physdev_op(int cmd, void *arg) 256 { 257 int rc = _hypercall2(int, physdev_op, cmd, arg); 258 if (unlikely(rc == -ENOSYS)) { 259 struct physdev_op op; 260 op.cmd = cmd; 261 memcpy(&op.u, arg, sizeof(op.u)); 262 rc = _hypercall1(int, physdev_op_compat, &op); 263 memcpy(arg, &op.u, sizeof(op.u)); 264 } 265 return rc; 266 } 267 268 static inline int 269 HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count) 270 { 271 return _hypercall3(int, grant_table_op, cmd, uop, count); 272 } 273 274 static inline int 275 HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val, 276 unsigned long flags, domid_t domid) 277 { 278 unsigned long pte_hi = 0; 279 #ifdef CONFIG_X86_PAE 280 pte_hi = new_val.pte_high; 281 #endif 282 return _hypercall5(int, update_va_mapping_otherdomain, va, 283 new_val.pte_low, pte_hi, flags, domid); 284 } 285 286 static inline int 287 HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type) 288 { 289 return _hypercall2(int, vm_assist, cmd, type); 290 } 291 292 static inline int 293 HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args) 294 { 295 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 296 } 297 298 static inline int 299 HYPERVISOR_suspend(unsigned long srec) 300 { 301 return _hypercall3(int, sched_op, SCHEDOP_shutdown, 302 SHUTDOWN_suspend, srec); 303 } 304 305 static inline int 306 HYPERVISOR_nmi_op(unsigned long op, unsigned long arg) 307 { 308 return _hypercall2(int, nmi_op, op, arg); 309 } 310 311 static inline void 312 MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va, 313 pte_t new_val, unsigned long flags) 314 { 315 mcl->op = __HYPERVISOR_update_va_mapping; 316 mcl->args[0] = va; 317 #ifdef CONFIG_X86_PAE 318 mcl->args[1] = new_val.pte_low; 319 mcl->args[2] = new_val.pte_high; 320 #else 321 mcl->args[1] = new_val.pte_low; 322 mcl->args[2] = 0; 323 #endif 324 mcl->args[3] = flags; 325 } 326 327 static inline void 328 MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd, 329 void *uop, unsigned int count) 330 { 331 mcl->op = __HYPERVISOR_grant_table_op; 332 mcl->args[0] = cmd; 333 mcl->args[1] = (unsigned long)uop; 334 mcl->args[2] = count; 335 } 336 337 static inline void 338 MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va, 339 pte_t new_val, unsigned long flags, 340 domid_t domid) 341 { 342 mcl->op = __HYPERVISOR_update_va_mapping_otherdomain; 343 mcl->args[0] = va; 344 #ifdef CONFIG_X86_PAE 345 mcl->args[1] = new_val.pte_low; 346 mcl->args[2] = new_val.pte_high; 347 #else 348 mcl->args[1] = new_val.pte_low; 349 mcl->args[2] = 0; 350 #endif 351 mcl->args[3] = flags; 352 mcl->args[4] = domid; 353 } 354 355 static inline void 356 MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr, 357 struct desc_struct desc) 358 { 359 mcl->op = __HYPERVISOR_update_descriptor; 360 mcl->args[0] = maddr; 361 mcl->args[1] = maddr >> 32; 362 mcl->args[2] = desc.a; 363 mcl->args[3] = desc.b; 364 } 365 366 static inline void 367 MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg) 368 { 369 mcl->op = __HYPERVISOR_memory_op; 370 mcl->args[0] = cmd; 371 mcl->args[1] = (unsigned long)arg; 372 } 373 374 static inline void 375 MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req, 376 int count, int *success_count, domid_t domid) 377 { 378 mcl->op = __HYPERVISOR_mmu_update; 379 mcl->args[0] = (unsigned long)req; 380 mcl->args[1] = count; 381 mcl->args[2] = (unsigned long)success_count; 382 mcl->args[3] = domid; 383 } 384 385 static inline void 386 MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count, 387 int *success_count, domid_t domid) 388 { 389 mcl->op = __HYPERVISOR_mmuext_op; 390 mcl->args[0] = (unsigned long)op; 391 mcl->args[1] = count; 392 mcl->args[2] = (unsigned long)success_count; 393 mcl->args[3] = domid; 394 } 395 396 static inline void 397 MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries) 398 { 399 mcl->op = __HYPERVISOR_set_gdt; 400 mcl->args[0] = (unsigned long)frames; 401 mcl->args[1] = entries; 402 } 403 404 static inline void 405 MULTI_stack_switch(struct multicall_entry *mcl, 406 unsigned long ss, unsigned long esp) 407 { 408 mcl->op = __HYPERVISOR_stack_switch; 409 mcl->args[0] = ss; 410 mcl->args[1] = esp; 411 } 412 413 #endif /* __HYPERCALL_H__ */ 414
