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 37extern 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 120static inline long 121privcmd_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 138static inline int 139HYPERVISOR_set_trap_table( 140 trap_info_t *table) 141{ 142 return _hypercall1(int, set_trap_table, table); 143} 144 145static inline int 146HYPERVISOR_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 152static inline int 153HYPERVISOR_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 159static inline int 160HYPERVISOR_set_gdt( 161 unsigned long *frame_list, int entries) 162{ 163 return _hypercall2(int, set_gdt, frame_list, entries); 164} 165 166static inline int 167HYPERVISOR_stack_switch( 168 unsigned long ss, unsigned long esp) 169{ 170 return _hypercall2(int, stack_switch, ss, esp); 171} 172 173static inline int 174HYPERVISOR_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 183static inline int 184HYPERVISOR_fpu_taskswitch( 185 int set) 186{ 187 return _hypercall1(int, fpu_taskswitch, set); 188} 189 190static inline int 191HYPERVISOR_sched_op_compat( 192 int cmd, unsigned long arg) 193{ 194 return _hypercall2(int, sched_op_compat, cmd, arg); 195} 196 197static inline int 198HYPERVISOR_sched_op( 199 int cmd, void *arg) 200{ 201 return _hypercall2(int, sched_op, cmd, arg); 202} 203 204static inline long 205HYPERVISOR_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 213static inline int 214HYPERVISOR_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 221static inline int 222HYPERVISOR_set_debugreg( 223 int reg, unsigned long value) 224{ 225 return _hypercall2(int, set_debugreg, reg, value); 226} 227 228static inline unsigned long 229HYPERVISOR_get_debugreg( 230 int reg) 231{ 232 return _hypercall1(unsigned long, get_debugreg, reg); 233} 234 235static inline int 236HYPERVISOR_update_descriptor( 237 uint64_t ma, uint64_t desc) 238{ 239 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32); 240} 241 242static inline int 243HYPERVISOR_memory_op( 244 unsigned int cmd, void *arg) 245{ 246 return _hypercall2(int, memory_op, cmd, arg); 247} 248 249static inline int 250HYPERVISOR_multicall( 251 void *call_list, int nr_calls) 252{ 253 return _hypercall2(int, multicall, call_list, nr_calls); 254} 255 256static inline int 257HYPERVISOR_update_va_mapping( 258 unsigned long va, uint64_t new_val, unsigned long flags) 259{ 260 uint32_t hi, lo; 261 262 lo = (uint32_t)(new_val & 0xffffffff); 263 hi = (uint32_t)(new_val >> 32); 264 265 return _hypercall4(int, update_va_mapping, va, 266 lo, hi, flags); 267} 268 269static inline int 270HYPERVISOR_event_channel_op( 271 int cmd, void *arg) 272{ 273 int rc = _hypercall2(int, event_channel_op, cmd, arg); 274 275#if CONFIG_XEN_COMPAT <= 0x030002 276 if (__predict_false(rc == -ENOXENSYS)) { 277 struct evtchn_op op; 278 op.cmd = cmd; 279 memcpy(&op.u, arg, sizeof(op.u)); 280 rc = _hypercall1(int, event_channel_op_compat, &op); 281 memcpy(arg, &op.u, sizeof(op.u)); 282 } 283#endif 284 return (rc); 285} 286 287static inline int 288HYPERVISOR_xen_version( 289 int cmd, void *arg) 290{ 291 return _hypercall2(int, xen_version, cmd, arg); 292} 293 294static inline int 295HYPERVISOR_console_io( 296 int cmd, int count, const char *str) 297{ 298 return _hypercall3(int, console_io, cmd, count, str); 299} 300 301static inline int 302HYPERVISOR_physdev_op( 303 int cmd, void *arg) 304{ 305 int rc = _hypercall2(int, physdev_op, cmd, arg); 306#if CONFIG_XEN_COMPAT <= 0x030002 307 if (__predict_false(rc == -ENOXENSYS)) { 308 struct physdev_op op; 309 op.cmd = cmd; 310 memcpy(&op.u, arg, sizeof(op.u)); 311 rc = _hypercall1(int, physdev_op_compat, &op); 312 memcpy(arg, &op.u, sizeof(op.u)); 313 } 314#endif 315 return (rc); 316} 317 318static inline int 319HYPERVISOR_grant_table_op( 320 unsigned int cmd, void *uop, unsigned int count) 321{ 322 return _hypercall3(int, grant_table_op, cmd, uop, count); 323} 324 325static inline int 326HYPERVISOR_update_va_mapping_otherdomain( 327 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid) 328{ 329 uint32_t hi, lo; 330 331 lo = (uint32_t)(new_val & 0xffffffff); 332 hi = (uint32_t)(new_val >> 32); 333 334 return _hypercall5(int, update_va_mapping_otherdomain, va, 335 lo, hi, flags, domid); 336} 337 338static inline int 339HYPERVISOR_vm_assist( 340 unsigned int cmd, unsigned int type) 341{ 342 return _hypercall2(int, vm_assist, cmd, type); 343} 344 345static inline int 346HYPERVISOR_vcpu_op( 347 int cmd, int vcpuid, void *extra_args) 348{ 349 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 350} 351 352static inline int 353HYPERVISOR_suspend( 354 unsigned long srec) 355{ 356 struct sched_shutdown sched_shutdown = { 357 .reason = SHUTDOWN_suspend 358 }; 359 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown, 360 &sched_shutdown, srec); 361#if CONFIG_XEN_COMPAT <= 0x030002 362 if (rc == -ENOXENSYS) 363 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown, 364 SHUTDOWN_suspend, srec); 365#endif 366 return (rc); 367} 368 369#if CONFIG_XEN_COMPAT <= 0x030002 370static inline int 371HYPERVISOR_nmi_op( 372 unsigned long op, void *arg) 373{ 374 return _hypercall2(int, nmi_op, op, arg); 375} 376#endif 377 378static inline int 379HYPERVISOR_callback_op( 380 int cmd, void *arg) 381{ 382 return _hypercall2(int, callback_op, cmd, arg); 383} 384 385#ifndef CONFIG_XEN 386static inline unsigned long 387HYPERVISOR_hvm_op( 388 int op, void *arg) 389{ 390 return _hypercall2(unsigned long, hvm_op, op, arg); 391} 392#endif 393 394static inline int 395HYPERVISOR_xenoprof_op( 396 int op, void *arg) 397{ 398 return _hypercall2(int, xenoprof_op, op, arg); 399} 400 401static inline int 402HYPERVISOR_kexec_op( 403 unsigned long op, void *args) 404{ 405 return _hypercall2(int, kexec_op, op, args); 406} 407#endif /* __HYPERCALL_H__ */ 408 409/* 410 * Local variables: 411 * c-file-style: "linux" 412 * indent-tabs-mode: t 413 * c-indent-level: 8 414 * c-basic-offset: 8 415 * tab-width: 8 416 * End: 417 */ 418