1 /****************************************************************************** 2 * hypercall.h 3 * 4 * Linux-specific hypervisor handling. 5 * 6 * Copyright (c) 2002-2004, K A Fraser 7 * 8 * This file may be distributed separately from the Linux kernel, or 9 * incorporated into other software packages, subject to the following license: 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a copy 12 * of this source file (the "Software"), to deal in the Software without 13 * restriction, including without limitation the rights to use, copy, modify, 14 * merge, publish, distribute, sublicense, and/or sell copies of the Software, 15 * and to permit persons to whom the Software is furnished to do so, subject to 16 * the following conditions: 17 * 18 * The above copyright notice and this permission notice shall be included in 19 * all copies or substantial portions of the Software. 20 * 21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 27 * IN THE SOFTWARE. 28 */ 29 30 #ifndef __HYPERCALL_H__ 31 #define __HYPERCALL_H__ 32 33 #include <sys/systm.h> 34 #include <xen/interface/xen.h> 35 #include <xen/interface/sched.h> 36 37 extern char *hypercall_page; 38 39 #define __STR(x) #x 40 #define STR(x) __STR(x) 41 #define ENOXENSYS 38 42 #define CONFIG_XEN_COMPAT 0x030002 43 44 #define HYPERCALL_STR(name) \ 45 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)" 46 47 #define _hypercall0(type, name) \ 48 ({ \ 49 long __res; \ 50 __asm__ volatile ( \ 51 HYPERCALL_STR(name) \ 52 : "=a" (__res) \ 53 : \ 54 : "memory" ); \ 55 (type)__res; \ 56 }) 57 58 #define _hypercall1(type, name, a1) \ 59 ({ \ 60 long __res, __ign1; \ 61 __asm__ volatile ( \ 62 HYPERCALL_STR(name) \ 63 : "=a" (__res), "=b" (__ign1) \ 64 : "1" ((long)(a1)) \ 65 : "memory" ); \ 66 (type)__res; \ 67 }) 68 69 #define _hypercall2(type, name, a1, a2) \ 70 ({ \ 71 long __res, __ign1, __ign2; \ 72 __asm__ volatile ( \ 73 HYPERCALL_STR(name) \ 74 : "=a" (__res), "=b" (__ign1), "=c" (__ign2) \ 75 : "1" ((long)(a1)), "2" ((long)(a2)) \ 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 HYPERCALL_STR(name) \ 85 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 86 "=d" (__ign3) \ 87 : "1" ((long)(a1)), "2" ((long)(a2)), \ 88 "3" ((long)(a3)) \ 89 : "memory" ); \ 90 (type)__res; \ 91 }) 92 93 #define _hypercall4(type, name, a1, a2, a3, a4) \ 94 ({ \ 95 long __res, __ign1, __ign2, __ign3, __ign4; \ 96 __asm__ volatile ( \ 97 HYPERCALL_STR(name) \ 98 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 99 "=d" (__ign3), "=S" (__ign4) \ 100 : "1" ((long)(a1)), "2" ((long)(a2)), \ 101 "3" ((long)(a3)), "4" ((long)(a4)) \ 102 : "memory" ); \ 103 (type)__res; \ 104 }) 105 106 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \ 107 ({ \ 108 long __res, __ign1, __ign2, __ign3, __ign4, __ign5; \ 109 __asm__ volatile ( \ 110 HYPERCALL_STR(name) \ 111 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 112 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \ 113 : "1" ((long)(a1)), "2" ((long)(a2)), \ 114 "3" ((long)(a3)), "4" ((long)(a4)), \ 115 "5" ((long)(a5)) \ 116 : "memory" ); \ 117 (type)__res; \ 118 }) 119 120 static inline long 121 privcmd_hypercall(long op, long a1, long a2, long a3, long a4, long a5) 122 { 123 long __res, __ign1, __ign2, __ign3, __ign4, __ign5, __call; 124 125 __call = (long)&hypercall_page + (op * 32); 126 __asm__ volatile ( 127 "call *%[call]" 128 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), 129 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) 130 : "1" ((long)(a1)), "2" ((long)(a2)), 131 "3" ((long)(a3)), "4" ((long)(a4)), 132 "5" ((long)(a5)), [call] "a" (__call) 133 : "memory" ); 134 135 return __res; 136 } 137 138 static inline int 139 HYPERVISOR_set_trap_table( 140 trap_info_t *table) 141 { 142 return _hypercall1(int, set_trap_table, table); 143 } 144 145 static inline int 146 HYPERVISOR_mmu_update( 147 mmu_update_t *req, int count, int *success_count, domid_t domid) 148 { 149 return _hypercall4(int, mmu_update, req, count, success_count, domid); 150 } 151 152 static inline int 153 HYPERVISOR_mmuext_op( 154 mmuext_op_t *op, int count, int *success_count, domid_t domid) 155 { 156 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 157 } 158 159 static inline int 160 HYPERVISOR_set_gdt( 161 unsigned long *frame_list, int entries) 162 { 163 return _hypercall2(int, set_gdt, frame_list, entries); 164 } 165 166 static inline int 167 HYPERVISOR_stack_switch( 168 unsigned long ss, unsigned long esp) 169 { 170 return _hypercall2(int, stack_switch, ss, esp); 171 } 172 173 static inline int 174 HYPERVISOR_set_callbacks( 175 unsigned long event_selector, unsigned long event_address, 176 unsigned long failsafe_selector, unsigned long failsafe_address) 177 { 178 return _hypercall4(int, set_callbacks, 179 event_selector, event_address, 180 failsafe_selector, failsafe_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 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 198 HYPERVISOR_sched_op( 199 int cmd, void *arg) 200 { 201 return _hypercall2(int, sched_op, cmd, arg); 202 } 203 204 static inline long 205 HYPERVISOR_set_timer_op( 206 uint64_t timeout) 207 { 208 unsigned long timeout_hi = (unsigned long)(timeout>>32); 209 unsigned long timeout_lo = (unsigned long)timeout; 210 return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi); 211 } 212 213 static inline int 214 HYPERVISOR_platform_op( 215 struct xen_platform_op *platform_op) 216 { 217 platform_op->interface_version = XENPF_INTERFACE_VERSION; 218 return _hypercall1(int, platform_op, platform_op); 219 } 220 221 static inline int 222 HYPERVISOR_set_debugreg( 223 int reg, unsigned long value) 224 { 225 return _hypercall2(int, set_debugreg, reg, value); 226 } 227 228 static inline unsigned long 229 HYPERVISOR_get_debugreg( 230 int reg) 231 { 232 return _hypercall1(unsigned long, get_debugreg, reg); 233 } 234 235 static inline int 236 HYPERVISOR_update_descriptor( 237 uint64_t ma, uint64_t desc) 238 { 239 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32); 240 } 241 242 static inline int 243 HYPERVISOR_memory_op( 244 unsigned int cmd, void *arg) 245 { 246 return _hypercall2(int, memory_op, cmd, arg); 247 } 248 249 static inline int 250 HYPERVISOR_multicall( 251 void *call_list, int nr_calls) 252 { 253 return _hypercall2(int, multicall, call_list, nr_calls); 254 } 255 256 static inline int 257 HYPERVISOR_update_va_mapping( 258 unsigned long va, uint64_t new_val, unsigned long flags) 259 { 260 uint32_t hi, lo; 261 262 lo = (uint32_t)(new_val & 0xffffffff); 263 hi = (uint32_t)(new_val >> 32); 264 265 return _hypercall4(int, update_va_mapping, va, 266 lo, hi, flags); 267 } 268 269 static inline int 270 HYPERVISOR_event_channel_op( 271 int cmd, void *arg) 272 { 273 int rc = _hypercall2(int, event_channel_op, cmd, arg); 274 275 #if CONFIG_XEN_COMPAT <= 0x030002 276 if (__predict_false(rc == -ENOXENSYS)) { 277 struct evtchn_op op; 278 op.cmd = cmd; 279 memcpy(&op.u, arg, sizeof(op.u)); 280 rc = _hypercall1(int, event_channel_op_compat, &op); 281 memcpy(arg, &op.u, sizeof(op.u)); 282 } 283 #endif 284 return (rc); 285 } 286 287 static inline int 288 HYPERVISOR_xen_version( 289 int cmd, void *arg) 290 { 291 return _hypercall2(int, xen_version, cmd, arg); 292 } 293 294 static inline int 295 HYPERVISOR_console_io( 296 int cmd, int count, const char *str) 297 { 298 return _hypercall3(int, console_io, cmd, count, str); 299 } 300 301 static inline int 302 HYPERVISOR_physdev_op( 303 int cmd, void *arg) 304 { 305 int rc = _hypercall2(int, physdev_op, cmd, arg); 306 #if CONFIG_XEN_COMPAT <= 0x030002 307 if (__predict_false(rc == -ENOXENSYS)) { 308 struct physdev_op op; 309 op.cmd = cmd; 310 memcpy(&op.u, arg, sizeof(op.u)); 311 rc = _hypercall1(int, physdev_op_compat, &op); 312 memcpy(arg, &op.u, sizeof(op.u)); 313 } 314 #endif 315 return (rc); 316 } 317 318 static inline int 319 HYPERVISOR_grant_table_op( 320 unsigned int cmd, void *uop, unsigned int count) 321 { 322 return _hypercall3(int, grant_table_op, cmd, uop, count); 323 } 324 325 static inline int 326 HYPERVISOR_update_va_mapping_otherdomain( 327 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 328 { 329 uint32_t hi, lo; 330 331 lo = (uint32_t)(new_val & 0xffffffff); 332 hi = (uint32_t)(new_val >> 32); 333 334 return _hypercall5(int, update_va_mapping_otherdomain, va, 335 lo, hi, flags, domid); 336 } 337 338 static inline int 339 HYPERVISOR_vm_assist( 340 unsigned int cmd, unsigned int type) 341 { 342 return _hypercall2(int, vm_assist, cmd, type); 343 } 344 345 static inline int 346 HYPERVISOR_vcpu_op( 347 int cmd, int vcpuid, void *extra_args) 348 { 349 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 350 } 351 352 static inline int 353 HYPERVISOR_suspend( 354 unsigned long srec) 355 { 356 struct sched_shutdown sched_shutdown = { 357 .reason = SHUTDOWN_suspend 358 }; 359 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown, 360 &sched_shutdown, srec); 361 #if CONFIG_XEN_COMPAT <= 0x030002 362 if (rc == -ENOXENSYS) 363 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown, 364 SHUTDOWN_suspend, srec); 365 #endif 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 static inline int 379 HYPERVISOR_callback_op( 380 int cmd, void *arg) 381 { 382 return _hypercall2(int, callback_op, cmd, arg); 383 } 384 385 #ifndef CONFIG_XEN 386 static inline unsigned long 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 395 HYPERVISOR_xenoprof_op( 396 int op, void *arg) 397 { 398 return _hypercall2(int, xenoprof_op, op, arg); 399 } 400 401 static inline int 402 HYPERVISOR_kexec_op( 403 unsigned long op, void *args) 404 { 405 return _hypercall2(int, kexec_op, op, args); 406 } 407 408 static inline int 409 HYPERVISOR_dm_op( 410 domid_t domid, unsigned int nr_bufs, const void *bufs) 411 { 412 return _hypercall3(int, dm_op, domid, nr_bufs, bufs); 413 } 414 #endif /* __HYPERCALL_H__ */ 415 416 /* 417 * Local variables: 418 * c-file-style: "linux" 419 * indent-tabs-mode: t 420 * c-indent-level: 8 421 * c-basic-offset: 8 422 * tab-width: 8 423 * End: 424 */ 425