1 /****************************************************************************** 2 * hypercall.h 3 * 4 * FreeBSD-specific hypervisor handling. 5 * 6 * Copyright (c) 2002-2004, K A Fraser 7 * 8 * 64-bit updates: 9 * Benjamin Liu <benjamin.liu@intel.com> 10 * Jun Nakajima <jun.nakajima@intel.com> 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License version 2 14 * as published by the Free Software Foundation; or, when distributed 15 * separately from the Linux kernel or incorporated into other 16 * software packages, subject to the following license: 17 * 18 * Permission is hereby granted, free of charge, to any person obtaining a copy 19 * of this source file (the "Software"), to deal in the Software without 20 * restriction, including without limitation the rights to use, copy, modify, 21 * merge, publish, distribute, sublicense, and/or sell copies of the Software, 22 * and to permit persons to whom the Software is furnished to do so, subject to 23 * the following conditions: 24 * 25 * The above copyright notice and this permission notice shall be included in 26 * all copies or substantial portions of the Software. 27 * 28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 29 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 30 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 31 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 32 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 33 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 34 * IN THE SOFTWARE. 35 * 36 * $FreeBSD$ 37 */ 38 39 #ifndef __MACHINE_XEN_HYPERCALL_H__ 40 #define __MACHINE_XEN_HYPERCALL_H__ 41 42 #include <sys/systm.h> 43 44 #ifndef __XEN_HYPERVISOR_H__ 45 # error "please don't include this file directly" 46 #endif 47 48 extern char *hypercall_page; 49 50 #define __STR(x) #x 51 #define STR(x) __STR(x) 52 #define ENOXENSYS 38 53 #define CONFIG_XEN_COMPAT 0x030002 54 #define __must_check 55 56 #define HYPERCALL_STR(name) \ 57 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)" 58 59 #define _hypercall0(type, name) \ 60 ({ \ 61 type __res; \ 62 __asm__ volatile ( \ 63 HYPERCALL_STR(name) \ 64 : "=a" (__res) \ 65 : \ 66 : "memory" ); \ 67 __res; \ 68 }) 69 70 #define _hypercall1(type, name, a1) \ 71 ({ \ 72 type __res; \ 73 long __ign1; \ 74 __asm__ volatile ( \ 75 HYPERCALL_STR(name) \ 76 : "=a" (__res), "=D" (__ign1) \ 77 : "1" ((long)(a1)) \ 78 : "memory" ); \ 79 __res; \ 80 }) 81 82 #define _hypercall2(type, name, a1, a2) \ 83 ({ \ 84 type __res; \ 85 long __ign1, __ign2; \ 86 __asm__ volatile ( \ 87 HYPERCALL_STR(name) \ 88 : "=a" (__res), "=D" (__ign1), "=S" (__ign2) \ 89 : "1" ((long)(a1)), "2" ((long)(a2)) \ 90 : "memory" ); \ 91 __res; \ 92 }) 93 94 #define _hypercall3(type, name, a1, a2, a3) \ 95 ({ \ 96 type __res; \ 97 long __ign1, __ign2, __ign3; \ 98 __asm__ volatile ( \ 99 HYPERCALL_STR(name) \ 100 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 101 "=d" (__ign3) \ 102 : "1" ((long)(a1)), "2" ((long)(a2)), \ 103 "3" ((long)(a3)) \ 104 : "memory" ); \ 105 __res; \ 106 }) 107 108 #define _hypercall4(type, name, a1, a2, a3, a4) \ 109 ({ \ 110 type __res; \ 111 long __ign1, __ign2, __ign3; \ 112 register long __arg4 __asm__("r10") = (long)(a4); \ 113 __asm__ volatile ( \ 114 HYPERCALL_STR(name) \ 115 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 116 "=d" (__ign3), "+r" (__arg4) \ 117 : "1" ((long)(a1)), "2" ((long)(a2)), \ 118 "3" ((long)(a3)) \ 119 : "memory" ); \ 120 __res; \ 121 }) 122 123 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \ 124 ({ \ 125 type __res; \ 126 long __ign1, __ign2, __ign3; \ 127 register long __arg4 __asm__("r10") = (long)(a4); \ 128 register long __arg5 __asm__("r8") = (long)(a5); \ 129 __asm__ volatile ( \ 130 HYPERCALL_STR(name) \ 131 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 132 "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) \ 133 : "1" ((long)(a1)), "2" ((long)(a2)), \ 134 "3" ((long)(a3)) \ 135 : "memory" ); \ 136 __res; \ 137 }) 138 139 static inline int 140 privcmd_hypercall(long op, long a1, long a2, long a3, long a4, long a5) 141 { 142 int __res; 143 long __ign1, __ign2, __ign3; 144 register long __arg4 __asm__("r10") = (long)(a4); 145 register long __arg5 __asm__("r8") = (long)(a5); 146 long __call = (long)&hypercall_page + (op * 32); 147 148 if (op >= PAGE_SIZE / 32) 149 return -EINVAL; 150 151 __asm__ volatile ( 152 "call *%[call]" 153 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), 154 "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) 155 : "1" ((long)(a1)), "2" ((long)(a2)), 156 "3" ((long)(a3)), [call] "a" (__call) 157 : "memory" ); 158 159 return (__res); 160 } 161 162 static inline int __must_check 163 HYPERVISOR_set_trap_table( 164 const trap_info_t *table) 165 { 166 return _hypercall1(int, set_trap_table, table); 167 } 168 169 static inline int __must_check 170 HYPERVISOR_mmu_update( 171 mmu_update_t *req, unsigned int count, unsigned int *success_count, 172 domid_t domid) 173 { 174 return _hypercall4(int, mmu_update, req, count, success_count, domid); 175 } 176 177 static inline int __must_check 178 HYPERVISOR_mmuext_op( 179 struct mmuext_op *op, unsigned int count, unsigned int *success_count, 180 domid_t domid) 181 { 182 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 183 } 184 185 static inline int __must_check 186 HYPERVISOR_set_gdt( 187 unsigned long *frame_list, unsigned int entries) 188 { 189 return _hypercall2(int, set_gdt, frame_list, entries); 190 } 191 192 static inline int __must_check 193 HYPERVISOR_stack_switch( 194 unsigned long ss, unsigned long esp) 195 { 196 return _hypercall2(int, stack_switch, ss, esp); 197 } 198 199 static inline int __must_check 200 HYPERVISOR_set_callbacks( 201 unsigned long event_address, unsigned long failsafe_address, 202 unsigned long syscall_address) 203 { 204 return _hypercall3(int, set_callbacks, 205 event_address, failsafe_address, syscall_address); 206 } 207 208 static inline int 209 HYPERVISOR_fpu_taskswitch( 210 int set) 211 { 212 return _hypercall1(int, fpu_taskswitch, set); 213 } 214 215 static inline int __must_check 216 HYPERVISOR_sched_op_compat( 217 int cmd, unsigned long arg) 218 { 219 return _hypercall2(int, sched_op_compat, cmd, arg); 220 } 221 222 static inline int __must_check 223 HYPERVISOR_sched_op( 224 int cmd, void *arg) 225 { 226 return _hypercall2(int, sched_op, cmd, arg); 227 } 228 229 static inline long __must_check 230 HYPERVISOR_set_timer_op( 231 uint64_t timeout) 232 { 233 return _hypercall1(long, set_timer_op, timeout); 234 } 235 236 static inline int __must_check 237 HYPERVISOR_platform_op( 238 struct xen_platform_op *platform_op) 239 { 240 platform_op->interface_version = XENPF_INTERFACE_VERSION; 241 return _hypercall1(int, platform_op, platform_op); 242 } 243 244 static inline int __must_check 245 HYPERVISOR_set_debugreg( 246 unsigned int reg, unsigned long value) 247 { 248 return _hypercall2(int, set_debugreg, reg, value); 249 } 250 251 static inline unsigned long __must_check 252 HYPERVISOR_get_debugreg( 253 unsigned int reg) 254 { 255 return _hypercall1(unsigned long, get_debugreg, reg); 256 } 257 258 static inline int __must_check 259 HYPERVISOR_update_descriptor( 260 unsigned long ma, unsigned long word) 261 { 262 return _hypercall2(int, update_descriptor, ma, word); 263 } 264 265 static inline int __must_check 266 HYPERVISOR_memory_op( 267 unsigned int cmd, void *arg) 268 { 269 return _hypercall2(int, memory_op, cmd, arg); 270 } 271 272 static inline int __must_check 273 HYPERVISOR_multicall( 274 multicall_entry_t *call_list, unsigned int nr_calls) 275 { 276 return _hypercall2(int, multicall, call_list, nr_calls); 277 } 278 279 static inline int __must_check 280 HYPERVISOR_update_va_mapping( 281 unsigned long va, uint64_t new_val, unsigned long flags) 282 { 283 return _hypercall3(int, update_va_mapping, va, new_val, flags); 284 } 285 286 static inline int __must_check 287 HYPERVISOR_event_channel_op( 288 int cmd, void *arg) 289 { 290 int rc = _hypercall2(int, event_channel_op, cmd, arg); 291 292 #if CONFIG_XEN_COMPAT <= 0x030002 293 if (__predict_false(rc == -ENOXENSYS)) { 294 struct evtchn_op op; 295 op.cmd = cmd; 296 memcpy(&op.u, arg, sizeof(op.u)); 297 rc = _hypercall1(int, event_channel_op_compat, &op); 298 memcpy(arg, &op.u, sizeof(op.u)); 299 } 300 #endif 301 302 return rc; 303 } 304 305 static inline int __must_check 306 HYPERVISOR_xen_version( 307 int cmd, void *arg) 308 { 309 return _hypercall2(int, xen_version, cmd, arg); 310 } 311 312 static inline int __must_check 313 HYPERVISOR_console_io( 314 int cmd, unsigned int count, const char *str) 315 { 316 return _hypercall3(int, console_io, cmd, count, str); 317 } 318 319 static inline int __must_check 320 HYPERVISOR_physdev_op( 321 int cmd, void *arg) 322 { 323 int rc = _hypercall2(int, physdev_op, cmd, arg); 324 325 #if CONFIG_XEN_COMPAT <= 0x030002 326 if (__predict_false(rc == -ENOXENSYS)) { 327 struct physdev_op op; 328 op.cmd = cmd; 329 memcpy(&op.u, arg, sizeof(op.u)); 330 rc = _hypercall1(int, physdev_op_compat, &op); 331 memcpy(arg, &op.u, sizeof(op.u)); 332 } 333 #endif 334 335 return rc; 336 } 337 338 static inline int __must_check 339 HYPERVISOR_grant_table_op( 340 unsigned int cmd, void *uop, unsigned int count) 341 { 342 return _hypercall3(int, grant_table_op, cmd, uop, count); 343 } 344 345 static inline int __must_check 346 HYPERVISOR_update_va_mapping_otherdomain( 347 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 348 { 349 return _hypercall4(int, update_va_mapping_otherdomain, va, 350 new_val, flags, domid); 351 } 352 353 static inline int __must_check 354 HYPERVISOR_vm_assist( 355 unsigned int cmd, unsigned int type) 356 { 357 return _hypercall2(int, vm_assist, cmd, type); 358 } 359 360 static inline int __must_check 361 HYPERVISOR_vcpu_op( 362 int cmd, unsigned int vcpuid, void *extra_args) 363 { 364 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 365 } 366 367 static inline int __must_check 368 HYPERVISOR_set_segment_base( 369 int reg, unsigned long value) 370 { 371 return _hypercall2(int, set_segment_base, reg, value); 372 } 373 374 static inline int __must_check 375 HYPERVISOR_suspend( 376 unsigned long srec) 377 { 378 struct sched_shutdown sched_shutdown = { 379 .reason = SHUTDOWN_suspend 380 }; 381 382 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown, 383 &sched_shutdown, srec); 384 385 #if CONFIG_XEN_COMPAT <= 0x030002 386 if (rc == -ENOXENSYS) 387 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown, 388 SHUTDOWN_suspend, srec); 389 #endif 390 391 return rc; 392 } 393 394 #if CONFIG_XEN_COMPAT <= 0x030002 395 static inline int 396 HYPERVISOR_nmi_op( 397 unsigned long op, void *arg) 398 { 399 return _hypercall2(int, nmi_op, op, arg); 400 } 401 #endif 402 403 #ifndef CONFIG_XEN 404 static inline unsigned long __must_check 405 HYPERVISOR_hvm_op( 406 int op, void *arg) 407 { 408 return _hypercall2(unsigned long, hvm_op, op, arg); 409 } 410 #endif 411 412 static inline int __must_check 413 HYPERVISOR_callback_op( 414 int cmd, const void *arg) 415 { 416 return _hypercall2(int, callback_op, cmd, arg); 417 } 418 419 static inline int __must_check 420 HYPERVISOR_xenoprof_op( 421 int op, void *arg) 422 { 423 return _hypercall2(int, xenoprof_op, op, arg); 424 } 425 426 static inline int __must_check 427 HYPERVISOR_kexec_op( 428 unsigned long op, void *args) 429 { 430 return _hypercall2(int, kexec_op, op, args); 431 } 432 433 static inline int __must_check 434 HYPERVISOR_dm_op( 435 domid_t domid, unsigned int nr_bufs, const void *bufs) 436 { 437 return _hypercall3(int, dm_op, domid, nr_bufs, bufs); 438 } 439 440 #undef __must_check 441 442 #endif /* __MACHINE_XEN_HYPERCALL_H__ */ 443