1 /****************************************************************************** 2 * SPDX-License-Identifier: MIT OR GPL-2.0-only 3 * 4 * hypercall.h 5 * 6 * FreeBSD-specific hypervisor handling. 7 * 8 * Copyright (c) 2002-2004, K A Fraser 9 * 10 * 64-bit updates: 11 * Benjamin Liu <benjamin.liu@intel.com> 12 * Jun Nakajima <jun.nakajima@intel.com> 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License version 2 16 * as published by the Free Software Foundation; or, when distributed 17 * separately from the Linux kernel or incorporated into other 18 * software packages, subject to the following license: 19 * 20 * Permission is hereby granted, free of charge, to any person obtaining a copy 21 * of this source file (the "Software"), to deal in the Software without 22 * restriction, including without limitation the rights to use, copy, modify, 23 * merge, publish, distribute, sublicense, and/or sell copies of the Software, 24 * and to permit persons to whom the Software is furnished to do so, subject to 25 * the following conditions: 26 * 27 * The above copyright notice and this permission notice shall be included in 28 * all copies or substantial portions of the Software. 29 * 30 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 31 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 32 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 33 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 34 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 35 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 36 * IN THE SOFTWARE. 37 */ 38 39 #ifndef __MACHINE_XEN_HYPERCALL_H__ 40 #define __MACHINE_XEN_HYPERCALL_H__ 41 42 #include <sys/systm.h> 43 44 #ifndef __XEN_HYPERVISOR_H__ 45 # error "please don't include this file directly" 46 #endif 47 48 extern char *hypercall_page; 49 50 #define __STR(x) #x 51 #define STR(x) __STR(x) 52 #define __must_check 53 54 #define HYPERCALL_STR(name) \ 55 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)" 56 57 #define _hypercall0(type, name) \ 58 ({ \ 59 type __res; \ 60 __asm__ volatile ( \ 61 HYPERCALL_STR(name) \ 62 : "=a" (__res) \ 63 : \ 64 : "memory" ); \ 65 __res; \ 66 }) 67 68 #define _hypercall1(type, name, a1) \ 69 ({ \ 70 type __res; \ 71 long __ign1; \ 72 __asm__ volatile ( \ 73 HYPERCALL_STR(name) \ 74 : "=a" (__res), "=D" (__ign1) \ 75 : "1" ((long)(a1)) \ 76 : "memory" ); \ 77 __res; \ 78 }) 79 80 #define _hypercall2(type, name, a1, a2) \ 81 ({ \ 82 type __res; \ 83 long __ign1, __ign2; \ 84 __asm__ volatile ( \ 85 HYPERCALL_STR(name) \ 86 : "=a" (__res), "=D" (__ign1), "=S" (__ign2) \ 87 : "1" ((long)(a1)), "2" ((long)(a2)) \ 88 : "memory" ); \ 89 __res; \ 90 }) 91 92 #define _hypercall3(type, name, a1, a2, a3) \ 93 ({ \ 94 type __res; \ 95 long __ign1, __ign2, __ign3; \ 96 __asm__ volatile ( \ 97 HYPERCALL_STR(name) \ 98 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 99 "=d" (__ign3) \ 100 : "1" ((long)(a1)), "2" ((long)(a2)), \ 101 "3" ((long)(a3)) \ 102 : "memory" ); \ 103 __res; \ 104 }) 105 106 #define _hypercall4(type, name, a1, a2, a3, a4) \ 107 ({ \ 108 type __res; \ 109 long __ign1, __ign2, __ign3; \ 110 register long __arg4 __asm__("r10") = (long)(a4); \ 111 __asm__ volatile ( \ 112 HYPERCALL_STR(name) \ 113 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 114 "=d" (__ign3), "+r" (__arg4) \ 115 : "1" ((long)(a1)), "2" ((long)(a2)), \ 116 "3" ((long)(a3)) \ 117 : "memory" ); \ 118 __res; \ 119 }) 120 121 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \ 122 ({ \ 123 type __res; \ 124 long __ign1, __ign2, __ign3; \ 125 register long __arg4 __asm__("r10") = (long)(a4); \ 126 register long __arg5 __asm__("r8") = (long)(a5); \ 127 __asm__ volatile ( \ 128 HYPERCALL_STR(name) \ 129 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \ 130 "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) \ 131 : "1" ((long)(a1)), "2" ((long)(a2)), \ 132 "3" ((long)(a3)) \ 133 : "memory" ); \ 134 __res; \ 135 }) 136 137 static inline int 138 privcmd_hypercall(long op, long a1, long a2, long a3, long a4, long a5) 139 { 140 int __res; 141 long __ign1, __ign2, __ign3; 142 register long __arg4 __asm__("r10") = (long)(a4); 143 register long __arg5 __asm__("r8") = (long)(a5); 144 long __call = (long)&hypercall_page + (op * 32); 145 146 if (op >= PAGE_SIZE / 32) 147 return -EINVAL; 148 149 __asm__ volatile ( 150 "call *%[call]" 151 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), 152 "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) 153 : "1" ((long)(a1)), "2" ((long)(a2)), 154 "3" ((long)(a3)), [call] "a" (__call) 155 : "memory" ); 156 157 return (__res); 158 } 159 160 static inline int __must_check 161 HYPERVISOR_set_trap_table( 162 const trap_info_t *table) 163 { 164 return _hypercall1(int, set_trap_table, table); 165 } 166 167 static inline int __must_check 168 HYPERVISOR_mmu_update( 169 mmu_update_t *req, unsigned int count, unsigned int *success_count, 170 domid_t domid) 171 { 172 return _hypercall4(int, mmu_update, req, count, success_count, domid); 173 } 174 175 static inline int __must_check 176 HYPERVISOR_mmuext_op( 177 struct mmuext_op *op, unsigned int count, unsigned int *success_count, 178 domid_t domid) 179 { 180 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 181 } 182 183 static inline int __must_check 184 HYPERVISOR_set_gdt( 185 unsigned long *frame_list, unsigned int entries) 186 { 187 return _hypercall2(int, set_gdt, frame_list, entries); 188 } 189 190 static inline int __must_check 191 HYPERVISOR_stack_switch( 192 unsigned long ss, unsigned long esp) 193 { 194 return _hypercall2(int, stack_switch, ss, esp); 195 } 196 197 static inline int __must_check 198 HYPERVISOR_set_callbacks( 199 unsigned long event_address, unsigned long failsafe_address, 200 unsigned long syscall_address) 201 { 202 return _hypercall3(int, set_callbacks, 203 event_address, failsafe_address, syscall_address); 204 } 205 206 static inline int 207 HYPERVISOR_fpu_taskswitch( 208 int set) 209 { 210 return _hypercall1(int, fpu_taskswitch, set); 211 } 212 213 static inline int __must_check 214 HYPERVISOR_sched_op( 215 int cmd, void *arg) 216 { 217 return _hypercall2(int, sched_op, cmd, arg); 218 } 219 220 static inline long __must_check 221 HYPERVISOR_set_timer_op( 222 uint64_t timeout) 223 { 224 return _hypercall1(long, set_timer_op, timeout); 225 } 226 227 static inline int __must_check 228 HYPERVISOR_platform_op( 229 struct xen_platform_op *platform_op) 230 { 231 platform_op->interface_version = XENPF_INTERFACE_VERSION; 232 return _hypercall1(int, platform_op, platform_op); 233 } 234 235 static inline int __must_check 236 HYPERVISOR_set_debugreg( 237 unsigned int reg, unsigned long value) 238 { 239 return _hypercall2(int, set_debugreg, reg, value); 240 } 241 242 static inline unsigned long __must_check 243 HYPERVISOR_get_debugreg( 244 unsigned int reg) 245 { 246 return _hypercall1(unsigned long, get_debugreg, reg); 247 } 248 249 static inline int __must_check 250 HYPERVISOR_update_descriptor( 251 unsigned long ma, unsigned long word) 252 { 253 return _hypercall2(int, update_descriptor, ma, word); 254 } 255 256 static inline int __must_check 257 HYPERVISOR_memory_op( 258 unsigned int cmd, void *arg) 259 { 260 return _hypercall2(int, memory_op, cmd, arg); 261 } 262 263 static inline int __must_check 264 HYPERVISOR_multicall( 265 multicall_entry_t *call_list, unsigned int nr_calls) 266 { 267 return _hypercall2(int, multicall, call_list, nr_calls); 268 } 269 270 static inline int __must_check 271 HYPERVISOR_update_va_mapping( 272 unsigned long va, uint64_t new_val, unsigned long flags) 273 { 274 return _hypercall3(int, update_va_mapping, va, new_val, flags); 275 } 276 277 static inline int __must_check 278 HYPERVISOR_event_channel_op( 279 int cmd, void *arg) 280 { 281 return _hypercall2(int, event_channel_op, cmd, arg); 282 } 283 284 static inline int __must_check 285 HYPERVISOR_xen_version( 286 int cmd, void *arg) 287 { 288 return _hypercall2(int, xen_version, cmd, arg); 289 } 290 291 static inline int __must_check 292 HYPERVISOR_console_io( 293 int cmd, unsigned int count, const char *str) 294 { 295 return _hypercall3(int, console_io, cmd, count, str); 296 } 297 298 static inline int __must_check 299 HYPERVISOR_physdev_op( 300 int cmd, void *arg) 301 { 302 return _hypercall2(int, physdev_op, cmd, arg); 303 } 304 305 static inline int __must_check 306 HYPERVISOR_grant_table_op( 307 unsigned int cmd, void *uop, unsigned int count) 308 { 309 return _hypercall3(int, grant_table_op, cmd, uop, count); 310 } 311 312 static inline int __must_check 313 HYPERVISOR_update_va_mapping_otherdomain( 314 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 315 { 316 return _hypercall4(int, update_va_mapping_otherdomain, va, 317 new_val, flags, domid); 318 } 319 320 static inline int __must_check 321 HYPERVISOR_vm_assist( 322 unsigned int cmd, unsigned int type) 323 { 324 return _hypercall2(int, vm_assist, cmd, type); 325 } 326 327 static inline int __must_check 328 HYPERVISOR_vcpu_op( 329 int cmd, unsigned int vcpuid, void *extra_args) 330 { 331 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 332 } 333 334 static inline int __must_check 335 HYPERVISOR_set_segment_base( 336 int reg, unsigned long value) 337 { 338 return _hypercall2(int, set_segment_base, reg, value); 339 } 340 341 static inline int __must_check 342 HYPERVISOR_suspend( 343 unsigned long srec) 344 { 345 struct sched_shutdown sched_shutdown = { 346 .reason = SHUTDOWN_suspend 347 }; 348 349 return _hypercall3(int, sched_op, SCHEDOP_shutdown, 350 &sched_shutdown, srec); 351 } 352 353 static inline unsigned long __must_check 354 HYPERVISOR_hvm_op( 355 int op, void *arg) 356 { 357 return _hypercall2(unsigned long, hvm_op, op, arg); 358 } 359 360 static inline int __must_check 361 HYPERVISOR_callback_op( 362 int cmd, const void *arg) 363 { 364 return _hypercall2(int, callback_op, cmd, arg); 365 } 366 367 static inline int __must_check 368 HYPERVISOR_xenoprof_op( 369 int op, void *arg) 370 { 371 return _hypercall2(int, xenoprof_op, op, arg); 372 } 373 374 static inline int __must_check 375 HYPERVISOR_kexec_op( 376 unsigned long op, void *args) 377 { 378 return _hypercall2(int, kexec_op, op, args); 379 } 380 381 static inline int __must_check 382 HYPERVISOR_dm_op( 383 domid_t domid, unsigned int nr_bufs, const void *bufs) 384 { 385 return _hypercall3(int, dm_op, domid, nr_bufs, bufs); 386 } 387 388 #undef __must_check 389 390 #endif /* __MACHINE_XEN_HYPERCALL_H__ */ 391