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 #define __STR(x) #x 49 #define STR(x) __STR(x) 50 #define ENOXENSYS 38 51 #define CONFIG_XEN_COMPAT 0x030002 52 #define __must_check 53 54 #ifdef XEN 55 #define HYPERCALL_STR(name) \ 56 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)" 57 #else 58 #define HYPERCALL_STR(name) \ 59 "mov $("STR(__HYPERVISOR_##name)" * 32),%%eax; "\ 60 "add hypercall_stubs(%%rip),%%rax; " \ 61 "call *%%rax" 62 #endif 63 64 #define _hypercall0(type, name) \ 65 ({ \ 66 type __res; \ 67 __asm__ volatile ( \ 68 HYPERCALL_STR(name) \ 69 : "=a" (__res) \ 70 : \ 71 : "memory" ); \ 72 __res; \ 73 }) 74 75 #define _hypercall1(type, name, a1) \ 76 ({ \ 77 type __res; \ 78 long __ign1; \ 79 __asm__ volatile ( \ 80 HYPERCALL_STR(name) \ 81 : "=a" (__res), "=D" (__ign1) \ 82 : "1" ((long)(a1)) \ 83 : "memory" ); \ 84 __res; \ 85 }) 86 87 #define _hypercall2(type, name, a1, a2) \ 88 ({ \ 89 type __res; \ 90 long __ign1, __ign2; \ 91 __asm__ volatile ( \ 92 HYPERCALL_STR(name) \ 93 : "=a" (__res), "=D" (__ign1), "=S" (__ign2) \ 94 : "1" ((long)(a1)), "2" ((long)(a2)) \ 95 : "memory" ); \ 96 __res; \ 97 }) 98 99 #define _hypercall3(type, name, a1, a2, a3) \ 100 ({ \ 101 type __res; \ 102 long __ign1, __ign2, __ign3; \ 103 __asm__ volatile ( \ 104 HYPERCALL_STR(name) \ 105 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 106 "=d" (__ign3) \ 107 : "1" ((long)(a1)), "2" ((long)(a2)), \ 108 "3" ((long)(a3)) \ 109 : "memory" ); \ 110 __res; \ 111 }) 112 113 #define _hypercall4(type, name, a1, a2, a3, a4) \ 114 ({ \ 115 type __res; \ 116 long __ign1, __ign2, __ign3; \ 117 register long __arg4 __asm__("r10") = (long)(a4); \ 118 __asm__ volatile ( \ 119 HYPERCALL_STR(name) \ 120 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 121 "=d" (__ign3), "+r" (__arg4) \ 122 : "1" ((long)(a1)), "2" ((long)(a2)), \ 123 "3" ((long)(a3)) \ 124 : "memory" ); \ 125 __res; \ 126 }) 127 128 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \ 129 ({ \ 130 type __res; \ 131 long __ign1, __ign2, __ign3; \ 132 register long __arg4 __asm__("r10") = (long)(a4); \ 133 register long __arg5 __asm__("r8") = (long)(a5); \ 134 __asm__ volatile ( \ 135 HYPERCALL_STR(name) \ 136 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 137 "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) \ 138 : "1" ((long)(a1)), "2" ((long)(a2)), \ 139 "3" ((long)(a3)) \ 140 : "memory" ); \ 141 __res; \ 142 }) 143 144 static inline int __must_check 145 HYPERVISOR_set_trap_table( 146 const trap_info_t *table) 147 { 148 return _hypercall1(int, set_trap_table, table); 149 } 150 151 static inline int __must_check 152 HYPERVISOR_mmu_update( 153 mmu_update_t *req, unsigned int count, unsigned int *success_count, 154 domid_t domid) 155 { 156 return _hypercall4(int, mmu_update, req, count, success_count, domid); 157 } 158 159 static inline int __must_check 160 HYPERVISOR_mmuext_op( 161 struct mmuext_op *op, unsigned int count, unsigned int *success_count, 162 domid_t domid) 163 { 164 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 165 } 166 167 static inline int __must_check 168 HYPERVISOR_set_gdt( 169 unsigned long *frame_list, unsigned int entries) 170 { 171 return _hypercall2(int, set_gdt, frame_list, entries); 172 } 173 174 static inline int __must_check 175 HYPERVISOR_stack_switch( 176 unsigned long ss, unsigned long esp) 177 { 178 return _hypercall2(int, stack_switch, ss, esp); 179 } 180 181 static inline int __must_check 182 HYPERVISOR_set_callbacks( 183 unsigned long event_address, unsigned long failsafe_address, 184 unsigned long syscall_address) 185 { 186 return _hypercall3(int, set_callbacks, 187 event_address, failsafe_address, syscall_address); 188 } 189 190 static inline int 191 HYPERVISOR_fpu_taskswitch( 192 int set) 193 { 194 return _hypercall1(int, fpu_taskswitch, set); 195 } 196 197 static inline int __must_check 198 HYPERVISOR_sched_op_compat( 199 int cmd, unsigned long arg) 200 { 201 return _hypercall2(int, sched_op_compat, cmd, arg); 202 } 203 204 static inline int __must_check 205 HYPERVISOR_sched_op( 206 int cmd, void *arg) 207 { 208 return _hypercall2(int, sched_op, cmd, arg); 209 } 210 211 static inline long __must_check 212 HYPERVISOR_set_timer_op( 213 uint64_t timeout) 214 { 215 return _hypercall1(long, set_timer_op, timeout); 216 } 217 218 static inline int __must_check 219 HYPERVISOR_platform_op( 220 struct xen_platform_op *platform_op) 221 { 222 platform_op->interface_version = XENPF_INTERFACE_VERSION; 223 return _hypercall1(int, platform_op, platform_op); 224 } 225 226 static inline int __must_check 227 HYPERVISOR_set_debugreg( 228 unsigned int reg, unsigned long value) 229 { 230 return _hypercall2(int, set_debugreg, reg, value); 231 } 232 233 static inline unsigned long __must_check 234 HYPERVISOR_get_debugreg( 235 unsigned int reg) 236 { 237 return _hypercall1(unsigned long, get_debugreg, reg); 238 } 239 240 static inline int __must_check 241 HYPERVISOR_update_descriptor( 242 unsigned long ma, unsigned long word) 243 { 244 return _hypercall2(int, update_descriptor, ma, word); 245 } 246 247 static inline int __must_check 248 HYPERVISOR_memory_op( 249 unsigned int cmd, void *arg) 250 { 251 return _hypercall2(int, memory_op, cmd, arg); 252 } 253 254 static inline int __must_check 255 HYPERVISOR_multicall( 256 multicall_entry_t *call_list, unsigned int nr_calls) 257 { 258 return _hypercall2(int, multicall, call_list, nr_calls); 259 } 260 261 static inline int __must_check 262 HYPERVISOR_update_va_mapping( 263 unsigned long va, uint64_t new_val, unsigned long flags) 264 { 265 return _hypercall3(int, update_va_mapping, va, new_val, flags); 266 } 267 268 static inline int __must_check 269 HYPERVISOR_event_channel_op( 270 int cmd, void *arg) 271 { 272 int rc = _hypercall2(int, event_channel_op, cmd, arg); 273 274 #if CONFIG_XEN_COMPAT <= 0x030002 275 if (__predict_false(rc == -ENOXENSYS)) { 276 struct evtchn_op op; 277 op.cmd = cmd; 278 memcpy(&op.u, arg, sizeof(op.u)); 279 rc = _hypercall1(int, event_channel_op_compat, &op); 280 memcpy(arg, &op.u, sizeof(op.u)); 281 } 282 #endif 283 284 return rc; 285 } 286 287 static inline int __must_check 288 HYPERVISOR_xen_version( 289 int cmd, void *arg) 290 { 291 return _hypercall2(int, xen_version, cmd, arg); 292 } 293 294 static inline int __must_check 295 HYPERVISOR_console_io( 296 int cmd, unsigned int count, char *str) 297 { 298 return _hypercall3(int, console_io, cmd, count, str); 299 } 300 301 static inline int __must_check 302 HYPERVISOR_physdev_op( 303 int cmd, void *arg) 304 { 305 int rc = _hypercall2(int, physdev_op, cmd, arg); 306 307 #if CONFIG_XEN_COMPAT <= 0x030002 308 if (__predict_false(rc == -ENOXENSYS)) { 309 struct physdev_op op; 310 op.cmd = cmd; 311 memcpy(&op.u, arg, sizeof(op.u)); 312 rc = _hypercall1(int, physdev_op_compat, &op); 313 memcpy(arg, &op.u, sizeof(op.u)); 314 } 315 #endif 316 317 return rc; 318 } 319 320 static inline int __must_check 321 HYPERVISOR_grant_table_op( 322 unsigned int cmd, void *uop, unsigned int count) 323 { 324 return _hypercall3(int, grant_table_op, cmd, uop, count); 325 } 326 327 static inline int __must_check 328 HYPERVISOR_update_va_mapping_otherdomain( 329 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 330 { 331 return _hypercall4(int, update_va_mapping_otherdomain, va, 332 new_val, flags, domid); 333 } 334 335 static inline int __must_check 336 HYPERVISOR_vm_assist( 337 unsigned int cmd, unsigned int type) 338 { 339 return _hypercall2(int, vm_assist, cmd, type); 340 } 341 342 static inline int __must_check 343 HYPERVISOR_vcpu_op( 344 int cmd, unsigned int vcpuid, void *extra_args) 345 { 346 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 347 } 348 349 static inline int __must_check 350 HYPERVISOR_set_segment_base( 351 int reg, unsigned long value) 352 { 353 return _hypercall2(int, set_segment_base, reg, value); 354 } 355 356 static inline int __must_check 357 HYPERVISOR_suspend( 358 unsigned long srec) 359 { 360 struct sched_shutdown sched_shutdown = { 361 .reason = SHUTDOWN_suspend 362 }; 363 364 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown, 365 &sched_shutdown, srec); 366 367 #if CONFIG_XEN_COMPAT <= 0x030002 368 if (rc == -ENOXENSYS) 369 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown, 370 SHUTDOWN_suspend, srec); 371 #endif 372 373 return rc; 374 } 375 376 #if CONFIG_XEN_COMPAT <= 0x030002 377 static inline int 378 HYPERVISOR_nmi_op( 379 unsigned long op, void *arg) 380 { 381 return _hypercall2(int, nmi_op, op, arg); 382 } 383 #endif 384 385 #ifndef CONFIG_XEN 386 static inline unsigned long __must_check 387 HYPERVISOR_hvm_op( 388 int op, void *arg) 389 { 390 return _hypercall2(unsigned long, hvm_op, op, arg); 391 } 392 #endif 393 394 static inline int __must_check 395 HYPERVISOR_callback_op( 396 int cmd, const void *arg) 397 { 398 return _hypercall2(int, callback_op, cmd, arg); 399 } 400 401 static inline int __must_check 402 HYPERVISOR_xenoprof_op( 403 int op, void *arg) 404 { 405 return _hypercall2(int, xenoprof_op, op, arg); 406 } 407 408 static inline int __must_check 409 HYPERVISOR_kexec_op( 410 unsigned long op, void *args) 411 { 412 return _hypercall2(int, kexec_op, op, args); 413 } 414 415 #undef __must_check 416 417 #endif /* __MACHINE_XEN_HYPERCALL_H__ */ 418