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 #define __STR(x) #x 38 #define STR(x) __STR(x) 39 #define ENOXENSYS 38 40 #define CONFIG_XEN_COMPAT 0x030002 41 42 43 #if defined(XEN) 44 #define HYPERCALL_STR(name) \ 45 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)" 46 #else 47 #define HYPERCALL_STR(name) \ 48 "mov hypercall_stubs,%%eax; " \ 49 "add $("STR(__HYPERVISOR_##name)" * 32),%%eax; " \ 50 "call *%%eax" 51 #endif 52 53 #define _hypercall0(type, name) \ 54 ({ \ 55 long __res; \ 56 __asm__ volatile ( \ 57 HYPERCALL_STR(name) \ 58 : "=a" (__res) \ 59 : \ 60 : "memory" ); \ 61 (type)__res; \ 62 }) 63 64 #define _hypercall1(type, name, a1) \ 65 ({ \ 66 long __res, __ign1; \ 67 __asm__ volatile ( \ 68 HYPERCALL_STR(name) \ 69 : "=a" (__res), "=b" (__ign1) \ 70 : "1" ((long)(a1)) \ 71 : "memory" ); \ 72 (type)__res; \ 73 }) 74 75 #define _hypercall2(type, name, a1, a2) \ 76 ({ \ 77 long __res, __ign1, __ign2; \ 78 __asm__ volatile ( \ 79 HYPERCALL_STR(name) \ 80 : "=a" (__res), "=b" (__ign1), "=c" (__ign2) \ 81 : "1" ((long)(a1)), "2" ((long)(a2)) \ 82 : "memory" ); \ 83 (type)__res; \ 84 }) 85 86 #define _hypercall3(type, name, a1, a2, a3) \ 87 ({ \ 88 long __res, __ign1, __ign2, __ign3; \ 89 __asm__ volatile ( \ 90 HYPERCALL_STR(name) \ 91 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 92 "=d" (__ign3) \ 93 : "1" ((long)(a1)), "2" ((long)(a2)), \ 94 "3" ((long)(a3)) \ 95 : "memory" ); \ 96 (type)__res; \ 97 }) 98 99 #define _hypercall4(type, name, a1, a2, a3, a4) \ 100 ({ \ 101 long __res, __ign1, __ign2, __ign3, __ign4; \ 102 __asm__ volatile ( \ 103 HYPERCALL_STR(name) \ 104 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 105 "=d" (__ign3), "=S" (__ign4) \ 106 : "1" ((long)(a1)), "2" ((long)(a2)), \ 107 "3" ((long)(a3)), "4" ((long)(a4)) \ 108 : "memory" ); \ 109 (type)__res; \ 110 }) 111 112 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \ 113 ({ \ 114 long __res, __ign1, __ign2, __ign3, __ign4, __ign5; \ 115 __asm__ volatile ( \ 116 HYPERCALL_STR(name) \ 117 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 118 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \ 119 : "1" ((long)(a1)), "2" ((long)(a2)), \ 120 "3" ((long)(a3)), "4" ((long)(a4)), \ 121 "5" ((long)(a5)) \ 122 : "memory" ); \ 123 (type)__res; \ 124 }) 125 126 static inline int 127 HYPERVISOR_set_trap_table( 128 trap_info_t *table) 129 { 130 return _hypercall1(int, set_trap_table, table); 131 } 132 133 static inline int 134 HYPERVISOR_mmu_update( 135 mmu_update_t *req, int count, int *success_count, domid_t domid) 136 { 137 return _hypercall4(int, mmu_update, req, count, success_count, domid); 138 } 139 140 static inline int 141 HYPERVISOR_mmuext_op( 142 mmuext_op_t *op, int count, int *success_count, domid_t domid) 143 { 144 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 145 } 146 147 static inline int 148 HYPERVISOR_set_gdt( 149 unsigned long *frame_list, int entries) 150 { 151 return _hypercall2(int, set_gdt, frame_list, entries); 152 } 153 154 static inline int 155 HYPERVISOR_stack_switch( 156 unsigned long ss, unsigned long esp) 157 { 158 return _hypercall2(int, stack_switch, ss, esp); 159 } 160 161 static inline int 162 HYPERVISOR_set_callbacks( 163 unsigned long event_selector, unsigned long event_address, 164 unsigned long failsafe_selector, unsigned long failsafe_address) 165 { 166 return _hypercall4(int, set_callbacks, 167 event_selector, event_address, 168 failsafe_selector, failsafe_address); 169 } 170 171 static inline int 172 HYPERVISOR_fpu_taskswitch( 173 int set) 174 { 175 return _hypercall1(int, fpu_taskswitch, set); 176 } 177 178 static inline int 179 HYPERVISOR_sched_op_compat( 180 int cmd, unsigned long arg) 181 { 182 return _hypercall2(int, sched_op_compat, cmd, arg); 183 } 184 185 static inline int 186 HYPERVISOR_sched_op( 187 int cmd, void *arg) 188 { 189 return _hypercall2(int, sched_op, cmd, arg); 190 } 191 192 static inline long 193 HYPERVISOR_set_timer_op( 194 uint64_t timeout) 195 { 196 unsigned long timeout_hi = (unsigned long)(timeout>>32); 197 unsigned long timeout_lo = (unsigned long)timeout; 198 return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi); 199 } 200 #if 0 201 static inline int 202 HYPERVISOR_platform_op( 203 struct xen_platform_op *platform_op) 204 { 205 platform_op->interface_version = XENPF_INTERFACE_VERSION; 206 return _hypercall1(int, platform_op, platform_op); 207 } 208 #endif 209 static inline int 210 HYPERVISOR_set_debugreg( 211 int reg, unsigned long value) 212 { 213 return _hypercall2(int, set_debugreg, reg, value); 214 } 215 216 static inline unsigned long 217 HYPERVISOR_get_debugreg( 218 int reg) 219 { 220 return _hypercall1(unsigned long, get_debugreg, reg); 221 } 222 223 static inline int 224 HYPERVISOR_update_descriptor( 225 uint64_t ma, uint64_t desc) 226 { 227 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32); 228 } 229 230 static inline int 231 HYPERVISOR_memory_op( 232 unsigned int cmd, void *arg) 233 { 234 return _hypercall2(int, memory_op, cmd, arg); 235 } 236 237 #if defined(XEN) 238 int HYPERVISOR_multicall(multicall_entry_t *, int); 239 static inline int 240 _HYPERVISOR_multicall( 241 #else /* XENHVM */ 242 static inline int 243 HYPERVISOR_multicall( 244 #endif 245 void *call_list, int nr_calls) 246 { 247 return _hypercall2(int, multicall, call_list, nr_calls); 248 } 249 250 static inline int 251 HYPERVISOR_update_va_mapping( 252 unsigned long va, uint64_t new_val, unsigned long flags) 253 { 254 uint32_t hi, lo; 255 256 lo = (uint32_t)(new_val & 0xffffffff); 257 hi = (uint32_t)(new_val >> 32); 258 259 return _hypercall4(int, update_va_mapping, va, 260 lo, hi, flags); 261 } 262 263 static inline int 264 HYPERVISOR_event_channel_op( 265 int cmd, void *arg) 266 { 267 int rc = _hypercall2(int, event_channel_op, cmd, arg); 268 269 #if CONFIG_XEN_COMPAT <= 0x030002 270 if (__predict_false(rc == -ENOXENSYS)) { 271 struct evtchn_op op; 272 op.cmd = cmd; 273 memcpy(&op.u, arg, sizeof(op.u)); 274 rc = _hypercall1(int, event_channel_op_compat, &op); 275 memcpy(arg, &op.u, sizeof(op.u)); 276 } 277 #endif 278 return (rc); 279 } 280 281 static inline int 282 HYPERVISOR_xen_version( 283 int cmd, void *arg) 284 { 285 return _hypercall2(int, xen_version, cmd, arg); 286 } 287 288 static inline int 289 HYPERVISOR_console_io( 290 int cmd, int count, char *str) 291 { 292 return _hypercall3(int, console_io, cmd, count, str); 293 } 294 295 static inline int 296 HYPERVISOR_physdev_op( 297 int cmd, void *arg) 298 { 299 int rc = _hypercall2(int, physdev_op, cmd, arg); 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 return (rc); 310 } 311 312 static inline int 313 HYPERVISOR_grant_table_op( 314 unsigned int cmd, void *uop, unsigned int count) 315 { 316 return _hypercall3(int, grant_table_op, cmd, uop, count); 317 } 318 319 static inline int 320 HYPERVISOR_update_va_mapping_otherdomain( 321 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 322 { 323 uint32_t hi, lo; 324 325 lo = (uint32_t)(new_val & 0xffffffff); 326 hi = (uint32_t)(new_val >> 32); 327 328 return _hypercall5(int, update_va_mapping_otherdomain, va, 329 lo, hi, flags, domid); 330 } 331 332 static inline int 333 HYPERVISOR_vm_assist( 334 unsigned int cmd, unsigned int type) 335 { 336 return _hypercall2(int, vm_assist, cmd, type); 337 } 338 339 static inline int 340 HYPERVISOR_vcpu_op( 341 int cmd, int vcpuid, void *extra_args) 342 { 343 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 344 } 345 346 static inline int 347 HYPERVISOR_suspend( 348 unsigned long srec) 349 { 350 struct sched_shutdown sched_shutdown = { 351 .reason = SHUTDOWN_suspend 352 }; 353 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown, 354 &sched_shutdown, srec); 355 #if CONFIG_XEN_COMPAT <= 0x030002 356 if (rc == -ENOXENSYS) 357 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown, 358 SHUTDOWN_suspend, srec); 359 #endif 360 return (rc); 361 } 362 363 #if CONFIG_XEN_COMPAT <= 0x030002 364 static inline int 365 HYPERVISOR_nmi_op( 366 unsigned long op, void *arg) 367 { 368 return _hypercall2(int, nmi_op, op, arg); 369 } 370 #endif 371 372 static inline int 373 HYPERVISOR_callback_op( 374 int cmd, void *arg) 375 { 376 return _hypercall2(int, callback_op, cmd, arg); 377 } 378 379 #ifndef CONFIG_XEN 380 static inline unsigned long 381 HYPERVISOR_hvm_op( 382 int op, void *arg) 383 { 384 return _hypercall2(unsigned long, hvm_op, op, arg); 385 } 386 #endif 387 388 static inline int 389 HYPERVISOR_xenoprof_op( 390 int op, void *arg) 391 { 392 return _hypercall2(int, xenoprof_op, op, arg); 393 } 394 395 static inline int 396 HYPERVISOR_kexec_op( 397 unsigned long op, void *args) 398 { 399 return _hypercall2(int, kexec_op, op, args); 400 } 401 #endif /* __HYPERCALL_H__ */ 402 403 /* 404 * Local variables: 405 * c-file-style: "linux" 406 * indent-tabs-mode: t 407 * c-indent-level: 8 408 * c-basic-offset: 8 409 * tab-width: 8 410 * End: 411 */ 412