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