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 __asm__ volatile ( 149 "call *%[call]" 150 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), 151 "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) 152 : "1" ((long)(a1)), "2" ((long)(a2)), 153 "3" ((long)(a3)), [call] "a" (__call) 154 : "memory" ); 155 156 return (__res); 157 } 158 159 static inline int __must_check 160 HYPERVISOR_set_trap_table( 161 const trap_info_t *table) 162 { 163 return _hypercall1(int, set_trap_table, table); 164 } 165 166 static inline int __must_check 167 HYPERVISOR_mmu_update( 168 mmu_update_t *req, unsigned int count, unsigned int *success_count, 169 domid_t domid) 170 { 171 return _hypercall4(int, mmu_update, req, count, success_count, domid); 172 } 173 174 static inline int __must_check 175 HYPERVISOR_mmuext_op( 176 struct mmuext_op *op, unsigned int count, unsigned int *success_count, 177 domid_t domid) 178 { 179 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 180 } 181 182 static inline int __must_check 183 HYPERVISOR_set_gdt( 184 unsigned long *frame_list, unsigned int entries) 185 { 186 return _hypercall2(int, set_gdt, frame_list, entries); 187 } 188 189 static inline int __must_check 190 HYPERVISOR_stack_switch( 191 unsigned long ss, unsigned long esp) 192 { 193 return _hypercall2(int, stack_switch, ss, esp); 194 } 195 196 static inline int __must_check 197 HYPERVISOR_set_callbacks( 198 unsigned long event_address, unsigned long failsafe_address, 199 unsigned long syscall_address) 200 { 201 return _hypercall3(int, set_callbacks, 202 event_address, failsafe_address, syscall_address); 203 } 204 205 static inline int 206 HYPERVISOR_fpu_taskswitch( 207 int set) 208 { 209 return _hypercall1(int, fpu_taskswitch, set); 210 } 211 212 static inline int __must_check 213 HYPERVISOR_sched_op_compat( 214 int cmd, unsigned long arg) 215 { 216 return _hypercall2(int, sched_op_compat, cmd, arg); 217 } 218 219 static inline int __must_check 220 HYPERVISOR_sched_op( 221 int cmd, void *arg) 222 { 223 return _hypercall2(int, sched_op, cmd, arg); 224 } 225 226 static inline long __must_check 227 HYPERVISOR_set_timer_op( 228 uint64_t timeout) 229 { 230 return _hypercall1(long, set_timer_op, timeout); 231 } 232 233 static inline int __must_check 234 HYPERVISOR_platform_op( 235 struct xen_platform_op *platform_op) 236 { 237 platform_op->interface_version = XENPF_INTERFACE_VERSION; 238 return _hypercall1(int, platform_op, platform_op); 239 } 240 241 static inline int __must_check 242 HYPERVISOR_set_debugreg( 243 unsigned int reg, unsigned long value) 244 { 245 return _hypercall2(int, set_debugreg, reg, value); 246 } 247 248 static inline unsigned long __must_check 249 HYPERVISOR_get_debugreg( 250 unsigned int reg) 251 { 252 return _hypercall1(unsigned long, get_debugreg, reg); 253 } 254 255 static inline int __must_check 256 HYPERVISOR_update_descriptor( 257 unsigned long ma, unsigned long word) 258 { 259 return _hypercall2(int, update_descriptor, ma, word); 260 } 261 262 static inline int __must_check 263 HYPERVISOR_memory_op( 264 unsigned int cmd, void *arg) 265 { 266 return _hypercall2(int, memory_op, cmd, arg); 267 } 268 269 static inline int __must_check 270 HYPERVISOR_multicall( 271 multicall_entry_t *call_list, unsigned int nr_calls) 272 { 273 return _hypercall2(int, multicall, call_list, nr_calls); 274 } 275 276 static inline int __must_check 277 HYPERVISOR_update_va_mapping( 278 unsigned long va, uint64_t new_val, unsigned long flags) 279 { 280 return _hypercall3(int, update_va_mapping, va, new_val, flags); 281 } 282 283 static inline int __must_check 284 HYPERVISOR_event_channel_op( 285 int cmd, void *arg) 286 { 287 int rc = _hypercall2(int, event_channel_op, cmd, arg); 288 289 #if CONFIG_XEN_COMPAT <= 0x030002 290 if (__predict_false(rc == -ENOXENSYS)) { 291 struct evtchn_op op; 292 op.cmd = cmd; 293 memcpy(&op.u, arg, sizeof(op.u)); 294 rc = _hypercall1(int, event_channel_op_compat, &op); 295 memcpy(arg, &op.u, sizeof(op.u)); 296 } 297 #endif 298 299 return rc; 300 } 301 302 static inline int __must_check 303 HYPERVISOR_xen_version( 304 int cmd, void *arg) 305 { 306 return _hypercall2(int, xen_version, cmd, arg); 307 } 308 309 static inline int __must_check 310 HYPERVISOR_console_io( 311 int cmd, unsigned int count, const char *str) 312 { 313 return _hypercall3(int, console_io, cmd, count, str); 314 } 315 316 static inline int __must_check 317 HYPERVISOR_physdev_op( 318 int cmd, void *arg) 319 { 320 int rc = _hypercall2(int, physdev_op, cmd, arg); 321 322 #if CONFIG_XEN_COMPAT <= 0x030002 323 if (__predict_false(rc == -ENOXENSYS)) { 324 struct physdev_op op; 325 op.cmd = cmd; 326 memcpy(&op.u, arg, sizeof(op.u)); 327 rc = _hypercall1(int, physdev_op_compat, &op); 328 memcpy(arg, &op.u, sizeof(op.u)); 329 } 330 #endif 331 332 return rc; 333 } 334 335 static inline int __must_check 336 HYPERVISOR_grant_table_op( 337 unsigned int cmd, void *uop, unsigned int count) 338 { 339 return _hypercall3(int, grant_table_op, cmd, uop, count); 340 } 341 342 static inline int __must_check 343 HYPERVISOR_update_va_mapping_otherdomain( 344 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 345 { 346 return _hypercall4(int, update_va_mapping_otherdomain, va, 347 new_val, flags, domid); 348 } 349 350 static inline int __must_check 351 HYPERVISOR_vm_assist( 352 unsigned int cmd, unsigned int type) 353 { 354 return _hypercall2(int, vm_assist, cmd, type); 355 } 356 357 static inline int __must_check 358 HYPERVISOR_vcpu_op( 359 int cmd, unsigned int vcpuid, void *extra_args) 360 { 361 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 362 } 363 364 static inline int __must_check 365 HYPERVISOR_set_segment_base( 366 int reg, unsigned long value) 367 { 368 return _hypercall2(int, set_segment_base, reg, value); 369 } 370 371 static inline int __must_check 372 HYPERVISOR_suspend( 373 unsigned long srec) 374 { 375 struct sched_shutdown sched_shutdown = { 376 .reason = SHUTDOWN_suspend 377 }; 378 379 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown, 380 &sched_shutdown, srec); 381 382 #if CONFIG_XEN_COMPAT <= 0x030002 383 if (rc == -ENOXENSYS) 384 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown, 385 SHUTDOWN_suspend, srec); 386 #endif 387 388 return rc; 389 } 390 391 #if CONFIG_XEN_COMPAT <= 0x030002 392 static inline int 393 HYPERVISOR_nmi_op( 394 unsigned long op, void *arg) 395 { 396 return _hypercall2(int, nmi_op, op, arg); 397 } 398 #endif 399 400 #ifndef CONFIG_XEN 401 static inline unsigned long __must_check 402 HYPERVISOR_hvm_op( 403 int op, void *arg) 404 { 405 return _hypercall2(unsigned long, hvm_op, op, arg); 406 } 407 #endif 408 409 static inline int __must_check 410 HYPERVISOR_callback_op( 411 int cmd, const void *arg) 412 { 413 return _hypercall2(int, callback_op, cmd, arg); 414 } 415 416 static inline int __must_check 417 HYPERVISOR_xenoprof_op( 418 int op, void *arg) 419 { 420 return _hypercall2(int, xenoprof_op, op, arg); 421 } 422 423 static inline int __must_check 424 HYPERVISOR_kexec_op( 425 unsigned long op, void *args) 426 { 427 return _hypercall2(int, kexec_op, op, args); 428 } 429 430 #undef __must_check 431 432 #endif /* __MACHINE_XEN_HYPERCALL_H__ */ 433