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 #if 0 213 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 #endif 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 #if defined(XEN) 250 int HYPERVISOR_multicall(multicall_entry_t *, int); 251 static inline int 252 _HYPERVISOR_multicall( 253 #else /* XENHVM */ 254 static inline int 255 HYPERVISOR_multicall( 256 #endif 257 void *call_list, int nr_calls) 258 { 259 return _hypercall2(int, multicall, call_list, nr_calls); 260 } 261 262 static inline int 263 HYPERVISOR_update_va_mapping( 264 unsigned long va, uint64_t new_val, unsigned long flags) 265 { 266 uint32_t hi, lo; 267 268 lo = (uint32_t)(new_val & 0xffffffff); 269 hi = (uint32_t)(new_val >> 32); 270 271 return _hypercall4(int, update_va_mapping, va, 272 lo, hi, flags); 273 } 274 275 static inline int 276 HYPERVISOR_event_channel_op( 277 int cmd, void *arg) 278 { 279 int rc = _hypercall2(int, event_channel_op, cmd, arg); 280 281 #if CONFIG_XEN_COMPAT <= 0x030002 282 if (__predict_false(rc == -ENOXENSYS)) { 283 struct evtchn_op op; 284 op.cmd = cmd; 285 memcpy(&op.u, arg, sizeof(op.u)); 286 rc = _hypercall1(int, event_channel_op_compat, &op); 287 memcpy(arg, &op.u, sizeof(op.u)); 288 } 289 #endif 290 return (rc); 291 } 292 293 static inline int 294 HYPERVISOR_xen_version( 295 int cmd, void *arg) 296 { 297 return _hypercall2(int, xen_version, cmd, arg); 298 } 299 300 static inline int 301 HYPERVISOR_console_io( 302 int cmd, int count, char *str) 303 { 304 return _hypercall3(int, console_io, cmd, count, str); 305 } 306 307 static inline int 308 HYPERVISOR_physdev_op( 309 int cmd, void *arg) 310 { 311 int rc = _hypercall2(int, physdev_op, cmd, arg); 312 #if CONFIG_XEN_COMPAT <= 0x030002 313 if (__predict_false(rc == -ENOXENSYS)) { 314 struct physdev_op op; 315 op.cmd = cmd; 316 memcpy(&op.u, arg, sizeof(op.u)); 317 rc = _hypercall1(int, physdev_op_compat, &op); 318 memcpy(arg, &op.u, sizeof(op.u)); 319 } 320 #endif 321 return (rc); 322 } 323 324 static inline int 325 HYPERVISOR_grant_table_op( 326 unsigned int cmd, void *uop, unsigned int count) 327 { 328 return _hypercall3(int, grant_table_op, cmd, uop, count); 329 } 330 331 static inline int 332 HYPERVISOR_update_va_mapping_otherdomain( 333 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 334 { 335 uint32_t hi, lo; 336 337 lo = (uint32_t)(new_val & 0xffffffff); 338 hi = (uint32_t)(new_val >> 32); 339 340 return _hypercall5(int, update_va_mapping_otherdomain, va, 341 lo, hi, flags, domid); 342 } 343 344 static inline int 345 HYPERVISOR_vm_assist( 346 unsigned int cmd, unsigned int type) 347 { 348 return _hypercall2(int, vm_assist, cmd, type); 349 } 350 351 static inline int 352 HYPERVISOR_vcpu_op( 353 int cmd, int vcpuid, void *extra_args) 354 { 355 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 356 } 357 358 static inline int 359 HYPERVISOR_suspend( 360 unsigned long srec) 361 { 362 struct sched_shutdown sched_shutdown = { 363 .reason = SHUTDOWN_suspend 364 }; 365 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown, 366 &sched_shutdown, srec); 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 return (rc); 373 } 374 375 #if CONFIG_XEN_COMPAT <= 0x030002 376 static inline int 377 HYPERVISOR_nmi_op( 378 unsigned long op, void *arg) 379 { 380 return _hypercall2(int, nmi_op, op, arg); 381 } 382 #endif 383 384 static inline int 385 HYPERVISOR_callback_op( 386 int cmd, void *arg) 387 { 388 return _hypercall2(int, callback_op, cmd, arg); 389 } 390 391 #ifndef CONFIG_XEN 392 static inline unsigned long 393 HYPERVISOR_hvm_op( 394 int op, void *arg) 395 { 396 return _hypercall2(unsigned long, hvm_op, op, arg); 397 } 398 #endif 399 400 static inline int 401 HYPERVISOR_xenoprof_op( 402 int op, void *arg) 403 { 404 return _hypercall2(int, xenoprof_op, op, arg); 405 } 406 407 static inline int 408 HYPERVISOR_kexec_op( 409 unsigned long op, void *args) 410 { 411 return _hypercall2(int, kexec_op, op, args); 412 } 413 #endif /* __HYPERCALL_H__ */ 414 415 /* 416 * Local variables: 417 * c-file-style: "linux" 418 * indent-tabs-mode: t 419 * c-indent-level: 8 420 * c-basic-offset: 8 421 * tab-width: 8 422 * End: 423 */ 424