1 /****************************************************************************** 2 * SPDX-License-Identifier: MIT OR GPL-2.0-only 3 * 4 * hypercall.h 5 * 6 * Linux-specific hypervisor handling. 7 * 8 * Copyright (c) 2002-2004, K A Fraser 9 * 10 * This file may be distributed separately from the Linux kernel, or 11 * incorporated into other software packages, subject to the following license: 12 * 13 * Permission is hereby granted, free of charge, to any person obtaining a copy 14 * of this source file (the "Software"), to deal in the Software without 15 * restriction, including without limitation the rights to use, copy, modify, 16 * merge, publish, distribute, sublicense, and/or sell copies of the Software, 17 * and to permit persons to whom the Software is furnished to do so, subject to 18 * the following conditions: 19 * 20 * The above copyright notice and this permission notice shall be included in 21 * all copies or substantial portions of the Software. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 26 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 27 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 28 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 29 * IN THE SOFTWARE. 30 */ 31 32 #ifndef __HYPERCALL_H__ 33 #define __HYPERCALL_H__ 34 35 #include <sys/systm.h> 36 #include <contrib/xen/xen.h> 37 #include <contrib/xen/sched.h> 38 39 extern char *hypercall_page; 40 41 #define __STR(x) #x 42 #define STR(x) __STR(x) 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 if (op >= PAGE_SIZE / 32) 126 return -EINVAL; 127 128 __call = (long)&hypercall_page + (op * 32); 129 __asm__ volatile ( 130 "call *%[call]" 131 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), 132 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) 133 : "1" ((long)(a1)), "2" ((long)(a2)), 134 "3" ((long)(a3)), "4" ((long)(a4)), 135 "5" ((long)(a5)), [call] "a" (__call) 136 : "memory" ); 137 138 return __res; 139 } 140 141 static inline int 142 HYPERVISOR_set_trap_table( 143 trap_info_t *table) 144 { 145 return _hypercall1(int, set_trap_table, table); 146 } 147 148 static inline int 149 HYPERVISOR_mmu_update( 150 mmu_update_t *req, int count, int *success_count, domid_t domid) 151 { 152 return _hypercall4(int, mmu_update, req, count, success_count, domid); 153 } 154 155 static inline int 156 HYPERVISOR_mmuext_op( 157 mmuext_op_t *op, int count, int *success_count, domid_t domid) 158 { 159 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 160 } 161 162 static inline int 163 HYPERVISOR_set_gdt( 164 unsigned long *frame_list, int entries) 165 { 166 return _hypercall2(int, set_gdt, frame_list, entries); 167 } 168 169 static inline int 170 HYPERVISOR_stack_switch( 171 unsigned long ss, unsigned long esp) 172 { 173 return _hypercall2(int, stack_switch, ss, esp); 174 } 175 176 static inline int 177 HYPERVISOR_set_callbacks( 178 unsigned long event_selector, unsigned long event_address, 179 unsigned long failsafe_selector, unsigned long failsafe_address) 180 { 181 return _hypercall4(int, set_callbacks, 182 event_selector, event_address, 183 failsafe_selector, failsafe_address); 184 } 185 186 static inline int 187 HYPERVISOR_fpu_taskswitch( 188 int set) 189 { 190 return _hypercall1(int, fpu_taskswitch, set); 191 } 192 193 static inline int 194 HYPERVISOR_sched_op( 195 int cmd, void *arg) 196 { 197 return _hypercall2(int, sched_op, cmd, arg); 198 } 199 200 static inline long 201 HYPERVISOR_set_timer_op( 202 uint64_t timeout) 203 { 204 unsigned long timeout_hi = (unsigned long)(timeout>>32); 205 unsigned long timeout_lo = (unsigned long)timeout; 206 return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi); 207 } 208 209 static inline int 210 HYPERVISOR_platform_op( 211 struct xen_platform_op *platform_op) 212 { 213 platform_op->interface_version = XENPF_INTERFACE_VERSION; 214 return _hypercall1(int, platform_op, platform_op); 215 } 216 217 static inline int 218 HYPERVISOR_set_debugreg( 219 int reg, unsigned long value) 220 { 221 return _hypercall2(int, set_debugreg, reg, value); 222 } 223 224 static inline unsigned long 225 HYPERVISOR_get_debugreg( 226 int reg) 227 { 228 return _hypercall1(unsigned long, get_debugreg, reg); 229 } 230 231 static inline int 232 HYPERVISOR_update_descriptor( 233 uint64_t ma, uint64_t desc) 234 { 235 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32); 236 } 237 238 static inline int 239 HYPERVISOR_memory_op( 240 unsigned int cmd, void *arg) 241 { 242 return _hypercall2(int, memory_op, cmd, arg); 243 } 244 245 static inline int 246 HYPERVISOR_multicall( 247 void *call_list, int nr_calls) 248 { 249 return _hypercall2(int, multicall, call_list, nr_calls); 250 } 251 252 static inline int 253 HYPERVISOR_update_va_mapping( 254 unsigned long va, uint64_t new_val, unsigned long flags) 255 { 256 uint32_t hi, lo; 257 258 lo = (uint32_t)(new_val & 0xffffffff); 259 hi = (uint32_t)(new_val >> 32); 260 261 return _hypercall4(int, update_va_mapping, va, 262 lo, hi, flags); 263 } 264 265 static inline int 266 HYPERVISOR_event_channel_op( 267 int cmd, void *arg) 268 { 269 return _hypercall2(int, event_channel_op, cmd, arg); 270 } 271 272 static inline int 273 HYPERVISOR_xen_version( 274 int cmd, void *arg) 275 { 276 return _hypercall2(int, xen_version, cmd, arg); 277 } 278 279 static inline int 280 HYPERVISOR_console_io( 281 int cmd, int count, const char *str) 282 { 283 return _hypercall3(int, console_io, cmd, count, str); 284 } 285 286 static inline int 287 HYPERVISOR_physdev_op( 288 int cmd, void *arg) 289 { 290 return _hypercall2(int, physdev_op, cmd, arg); 291 } 292 293 static inline int 294 HYPERVISOR_grant_table_op( 295 unsigned int cmd, void *uop, unsigned int count) 296 { 297 return _hypercall3(int, grant_table_op, cmd, uop, count); 298 } 299 300 static inline int 301 HYPERVISOR_update_va_mapping_otherdomain( 302 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 303 { 304 uint32_t hi, lo; 305 306 lo = (uint32_t)(new_val & 0xffffffff); 307 hi = (uint32_t)(new_val >> 32); 308 309 return _hypercall5(int, update_va_mapping_otherdomain, va, 310 lo, hi, flags, domid); 311 } 312 313 static inline int 314 HYPERVISOR_vm_assist( 315 unsigned int cmd, unsigned int type) 316 { 317 return _hypercall2(int, vm_assist, cmd, type); 318 } 319 320 static inline int 321 HYPERVISOR_vcpu_op( 322 int cmd, int vcpuid, void *extra_args) 323 { 324 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 325 } 326 327 static inline int 328 HYPERVISOR_suspend( 329 unsigned long srec) 330 { 331 struct sched_shutdown sched_shutdown = { 332 .reason = SHUTDOWN_suspend 333 }; 334 335 return _hypercall3(int, sched_op, SCHEDOP_shutdown, 336 &sched_shutdown, srec); 337 } 338 339 static inline int 340 HYPERVISOR_callback_op( 341 int cmd, void *arg) 342 { 343 return _hypercall2(int, callback_op, cmd, arg); 344 } 345 346 static inline unsigned long 347 HYPERVISOR_hvm_op( 348 int op, void *arg) 349 { 350 return _hypercall2(unsigned long, hvm_op, op, arg); 351 } 352 353 static inline int 354 HYPERVISOR_xenoprof_op( 355 int op, void *arg) 356 { 357 return _hypercall2(int, xenoprof_op, op, arg); 358 } 359 360 static inline int 361 HYPERVISOR_kexec_op( 362 unsigned long op, void *args) 363 { 364 return _hypercall2(int, kexec_op, op, args); 365 } 366 367 static inline int 368 HYPERVISOR_dm_op( 369 domid_t domid, unsigned int nr_bufs, const void *bufs) 370 { 371 return _hypercall3(int, dm_op, domid, nr_bufs, bufs); 372 } 373 #endif /* __HYPERCALL_H__ */ 374 375 /* 376 * Local variables: 377 * c-file-style: "linux" 378 * indent-tabs-mode: t 379 * c-indent-level: 8 380 * c-basic-offset: 8 381 * tab-width: 8 382 * End: 383 */ 384