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 <contrib/xen/xen.h> 35 #include <contrib/xen/sched.h> 36 37 extern char *hypercall_page; 38 39 #define __STR(x) #x 40 #define STR(x) __STR(x) 41 42 #define HYPERCALL_STR(name) \ 43 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)" 44 45 #define _hypercall0(type, name) \ 46 ({ \ 47 long __res; \ 48 __asm__ volatile ( \ 49 HYPERCALL_STR(name) \ 50 : "=a" (__res) \ 51 : \ 52 : "memory" ); \ 53 (type)__res; \ 54 }) 55 56 #define _hypercall1(type, name, a1) \ 57 ({ \ 58 long __res, __ign1; \ 59 __asm__ volatile ( \ 60 HYPERCALL_STR(name) \ 61 : "=a" (__res), "=b" (__ign1) \ 62 : "1" ((long)(a1)) \ 63 : "memory" ); \ 64 (type)__res; \ 65 }) 66 67 #define _hypercall2(type, name, a1, a2) \ 68 ({ \ 69 long __res, __ign1, __ign2; \ 70 __asm__ volatile ( \ 71 HYPERCALL_STR(name) \ 72 : "=a" (__res), "=b" (__ign1), "=c" (__ign2) \ 73 : "1" ((long)(a1)), "2" ((long)(a2)) \ 74 : "memory" ); \ 75 (type)__res; \ 76 }) 77 78 #define _hypercall3(type, name, a1, a2, a3) \ 79 ({ \ 80 long __res, __ign1, __ign2, __ign3; \ 81 __asm__ volatile ( \ 82 HYPERCALL_STR(name) \ 83 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 84 "=d" (__ign3) \ 85 : "1" ((long)(a1)), "2" ((long)(a2)), \ 86 "3" ((long)(a3)) \ 87 : "memory" ); \ 88 (type)__res; \ 89 }) 90 91 #define _hypercall4(type, name, a1, a2, a3, a4) \ 92 ({ \ 93 long __res, __ign1, __ign2, __ign3, __ign4; \ 94 __asm__ volatile ( \ 95 HYPERCALL_STR(name) \ 96 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 97 "=d" (__ign3), "=S" (__ign4) \ 98 : "1" ((long)(a1)), "2" ((long)(a2)), \ 99 "3" ((long)(a3)), "4" ((long)(a4)) \ 100 : "memory" ); \ 101 (type)__res; \ 102 }) 103 104 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \ 105 ({ \ 106 long __res, __ign1, __ign2, __ign3, __ign4, __ign5; \ 107 __asm__ volatile ( \ 108 HYPERCALL_STR(name) \ 109 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 110 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \ 111 : "1" ((long)(a1)), "2" ((long)(a2)), \ 112 "3" ((long)(a3)), "4" ((long)(a4)), \ 113 "5" ((long)(a5)) \ 114 : "memory" ); \ 115 (type)__res; \ 116 }) 117 118 static inline long 119 privcmd_hypercall(long op, long a1, long a2, long a3, long a4, long a5) 120 { 121 long __res, __ign1, __ign2, __ign3, __ign4, __ign5, __call; 122 123 if (op >= PAGE_SIZE / 32) 124 return -EINVAL; 125 126 __call = (long)&hypercall_page + (op * 32); 127 __asm__ volatile ( 128 "call *%[call]" 129 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), 130 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) 131 : "1" ((long)(a1)), "2" ((long)(a2)), 132 "3" ((long)(a3)), "4" ((long)(a4)), 133 "5" ((long)(a5)), [call] "a" (__call) 134 : "memory" ); 135 136 return __res; 137 } 138 139 static inline int 140 HYPERVISOR_set_trap_table( 141 trap_info_t *table) 142 { 143 return _hypercall1(int, set_trap_table, table); 144 } 145 146 static inline int 147 HYPERVISOR_mmu_update( 148 mmu_update_t *req, int count, int *success_count, domid_t domid) 149 { 150 return _hypercall4(int, mmu_update, req, count, success_count, domid); 151 } 152 153 static inline int 154 HYPERVISOR_mmuext_op( 155 mmuext_op_t *op, int count, int *success_count, domid_t domid) 156 { 157 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 158 } 159 160 static inline int 161 HYPERVISOR_set_gdt( 162 unsigned long *frame_list, int entries) 163 { 164 return _hypercall2(int, set_gdt, frame_list, entries); 165 } 166 167 static inline int 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 175 HYPERVISOR_set_callbacks( 176 unsigned long event_selector, unsigned long event_address, 177 unsigned long failsafe_selector, unsigned long failsafe_address) 178 { 179 return _hypercall4(int, set_callbacks, 180 event_selector, event_address, 181 failsafe_selector, failsafe_address); 182 } 183 184 static inline int 185 HYPERVISOR_fpu_taskswitch( 186 int set) 187 { 188 return _hypercall1(int, fpu_taskswitch, set); 189 } 190 191 static inline int 192 HYPERVISOR_sched_op( 193 int cmd, void *arg) 194 { 195 return _hypercall2(int, sched_op, cmd, arg); 196 } 197 198 static inline long 199 HYPERVISOR_set_timer_op( 200 uint64_t timeout) 201 { 202 unsigned long timeout_hi = (unsigned long)(timeout>>32); 203 unsigned long timeout_lo = (unsigned long)timeout; 204 return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi); 205 } 206 207 static inline int 208 HYPERVISOR_platform_op( 209 struct xen_platform_op *platform_op) 210 { 211 platform_op->interface_version = XENPF_INTERFACE_VERSION; 212 return _hypercall1(int, platform_op, platform_op); 213 } 214 215 static inline int 216 HYPERVISOR_set_debugreg( 217 int reg, unsigned long value) 218 { 219 return _hypercall2(int, set_debugreg, reg, value); 220 } 221 222 static inline unsigned long 223 HYPERVISOR_get_debugreg( 224 int reg) 225 { 226 return _hypercall1(unsigned long, get_debugreg, reg); 227 } 228 229 static inline int 230 HYPERVISOR_update_descriptor( 231 uint64_t ma, uint64_t desc) 232 { 233 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32); 234 } 235 236 static inline int 237 HYPERVISOR_memory_op( 238 unsigned int cmd, void *arg) 239 { 240 return _hypercall2(int, memory_op, cmd, arg); 241 } 242 243 static inline int 244 HYPERVISOR_multicall( 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 return _hypercall2(int, event_channel_op, cmd, arg); 268 } 269 270 static inline int 271 HYPERVISOR_xen_version( 272 int cmd, void *arg) 273 { 274 return _hypercall2(int, xen_version, cmd, arg); 275 } 276 277 static inline int 278 HYPERVISOR_console_io( 279 int cmd, int count, const char *str) 280 { 281 return _hypercall3(int, console_io, cmd, count, str); 282 } 283 284 static inline int 285 HYPERVISOR_physdev_op( 286 int cmd, void *arg) 287 { 288 return _hypercall2(int, physdev_op, cmd, arg); 289 } 290 291 static inline int 292 HYPERVISOR_grant_table_op( 293 unsigned int cmd, void *uop, unsigned int count) 294 { 295 return _hypercall3(int, grant_table_op, cmd, uop, count); 296 } 297 298 static inline int 299 HYPERVISOR_update_va_mapping_otherdomain( 300 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 301 { 302 uint32_t hi, lo; 303 304 lo = (uint32_t)(new_val & 0xffffffff); 305 hi = (uint32_t)(new_val >> 32); 306 307 return _hypercall5(int, update_va_mapping_otherdomain, va, 308 lo, hi, flags, domid); 309 } 310 311 static inline int 312 HYPERVISOR_vm_assist( 313 unsigned int cmd, unsigned int type) 314 { 315 return _hypercall2(int, vm_assist, cmd, type); 316 } 317 318 static inline int 319 HYPERVISOR_vcpu_op( 320 int cmd, int vcpuid, void *extra_args) 321 { 322 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 323 } 324 325 static inline int 326 HYPERVISOR_suspend( 327 unsigned long srec) 328 { 329 struct sched_shutdown sched_shutdown = { 330 .reason = SHUTDOWN_suspend 331 }; 332 333 return _hypercall3(int, sched_op, SCHEDOP_shutdown, 334 &sched_shutdown, srec); 335 } 336 337 static inline int 338 HYPERVISOR_callback_op( 339 int cmd, void *arg) 340 { 341 return _hypercall2(int, callback_op, cmd, arg); 342 } 343 344 static inline unsigned long 345 HYPERVISOR_hvm_op( 346 int op, void *arg) 347 { 348 return _hypercall2(unsigned long, hvm_op, op, arg); 349 } 350 351 static inline int 352 HYPERVISOR_xenoprof_op( 353 int op, void *arg) 354 { 355 return _hypercall2(int, xenoprof_op, op, arg); 356 } 357 358 static inline int 359 HYPERVISOR_kexec_op( 360 unsigned long op, void *args) 361 { 362 return _hypercall2(int, kexec_op, op, args); 363 } 364 365 static inline int 366 HYPERVISOR_dm_op( 367 domid_t domid, unsigned int nr_bufs, const void *bufs) 368 { 369 return _hypercall3(int, dm_op, domid, nr_bufs, bufs); 370 } 371 #endif /* __HYPERCALL_H__ */ 372 373 /* 374 * Local variables: 375 * c-file-style: "linux" 376 * indent-tabs-mode: t 377 * c-indent-level: 8 378 * c-basic-offset: 8 379 * tab-width: 8 380 * End: 381 */ 382