include/asm-i386/mach-xen/asm/hypercall.h

   1 /******************************************************************************
   2  * hypercall.h
   3  *
   4  * Linux-specific hypervisor handling.
   5  *
   6  * Copyright (c) 2002-2004, K A Fraser
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License version 2
  10  * as published by the Free Software Foundation; or, when distributed
  11  * separately from the Linux kernel or incorporated into other
  12  * software packages, subject to the following license:
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a copy
  15  * of this source file (the "Software"), to deal in the Software without
  16  * restriction, including without limitation the rights to use, copy, modify,
  17  * merge, publish, distribute, sublicense, and/or sell copies of the Software,
  18  * and to permit persons to whom the Software is furnished to do so, subject to
  19  * the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included in
  22  * all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  25  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  27  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  28  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  29  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  30  * IN THE SOFTWARE.
  31  */
  32
  33 #ifndef __HYPERCALL_H__
  34 #define __HYPERCALL_H__
  35
  36 #include <linux/string.h> /* memcpy() */
  37
  38 #ifndef __HYPERVISOR_H__
  39 # error "please don't include this file directly"
  40 #endif
  41
  42 #define __STR(x) #x
  43 #define STR(x) __STR(x)
  44
  45 #ifdef CONFIG_XEN
  46 #define HYPERCALL_STR(name)                                     \
  47         "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
  48 #else
  49 #define HYPERCALL_STR(name)                                     \
  50         "mov hypercall_stubs,%%eax; "                           \
  51         "add $("STR(__HYPERVISOR_##name)" * 32),%%eax; "        \
  52         "call *%%eax"
  53 #endif
  54
  55 #define _hypercall0(type, name)                 \
  56 ({                                              \
  57         long __res;                             \
  58         asm volatile (                          \
  59                 HYPERCALL_STR(name)             \
  60                 : "=a" (__res)                  \
  61                 :                               \
  62                 : "memory" );                   \
  63         (type)__res;                            \
  64 })
  65
  66 #define _hypercall1(type, name, a1)                             \
  67 ({                                                              \
  68         long __res, __ign1;                                     \
  69         asm volatile (                                          \
  70                 HYPERCALL_STR(name)                             \
  71                 : "=a" (__res), "=b" (__ign1)                   \
  72                 : "1" ((long)(a1))                              \
  73                 : "memory" );                                   \
  74         (type)__res;                                            \
  75 })
  76
  77 #define _hypercall2(type, name, a1, a2)                         \
  78 ({                                                              \
  79         long __res, __ign1, __ign2;                             \
  80         asm volatile (                                          \
  81                 HYPERCALL_STR(name)                             \
  82                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2)    \
  83                 : "1" ((long)(a1)), "2" ((long)(a2))            \
  84                 : "memory" );                                   \
  85         (type)__res;                                            \
  86 })
  87
  88 #define _hypercall3(type, name, a1, a2, a3)                     \
  89 ({                                                              \
  90         long __res, __ign1, __ign2, __ign3;                     \
  91         asm volatile (                                          \
  92                 HYPERCALL_STR(name)                             \
  93                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
  94                 "=d" (__ign3)                                   \
  95                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
  96                 "3" ((long)(a3))                                \
  97                 : "memory" );                                   \
  98         (type)__res;                                            \
  99 })
 100
 101 #define _hypercall4(type, name, a1, a2, a3, a4)                 \
 102 ({                                                              \
 103         long __res, __ign1, __ign2, __ign3, __ign4;             \
 104         asm volatile (                                          \
 105                 HYPERCALL_STR(name)                             \
 106                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
 107                 "=d" (__ign3), "=S" (__ign4)                    \
 108                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 109                 "3" ((long)(a3)), "4" ((long)(a4))              \
 110                 : "memory" );                                   \
 111         (type)__res;                                            \
 112 })
 113
 114 #define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
 115 ({                                                              \
 116         long __res, __ign1, __ign2, __ign3, __ign4, __ign5;     \
 117         asm volatile (                                          \
 118                 HYPERCALL_STR(name)                             \
 119                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
 120                 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)     \
 121                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 122                 "3" ((long)(a3)), "4" ((long)(a4)),             \
 123                 "5" ((long)(a5))                                \
 124                 : "memory" );                                   \
 125         (type)__res;                                            \
 126 })
 127
 128 static inline int
 129 HYPERVISOR_set_trap_table(
 130         trap_info_t *table)
 131 {
 132         return _hypercall1(int, set_trap_table, table);
 133 }
 134
 135 static inline int
 136 HYPERVISOR_mmu_update(
 137         mmu_update_t *req, int count, int *success_count, domid_t domid)
 138 {
 139         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 140 }
 141
 142 static inline int
 143 HYPERVISOR_mmuext_op(
 144         struct mmuext_op *op, int count, int *success_count, domid_t domid)
 145 {
 146         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 147 }
 148
 149 static inline int
 150 HYPERVISOR_set_gdt(
 151         unsigned long *frame_list, int entries)
 152 {
 153         return _hypercall2(int, set_gdt, frame_list, entries);
 154 }
 155
 156 static inline int
 157 HYPERVISOR_stack_switch(
 158         unsigned long ss, unsigned long esp)
 159 {
 160         return _hypercall2(int, stack_switch, ss, esp);
 161 }
 162
 163 static inline int
 164 HYPERVISOR_set_callbacks(
 165         unsigned long event_selector, unsigned long event_address,
 166         unsigned long failsafe_selector, unsigned long failsafe_address)
 167 {
 168         return _hypercall4(int, set_callbacks,
 169                            event_selector, event_address,
 170                            failsafe_selector, failsafe_address);
 171 }
 172
 173 static inline int
 174 HYPERVISOR_fpu_taskswitch(
 175         int set)
 176 {
 177         return _hypercall1(int, fpu_taskswitch, set);
 178 }
 179
 180 static inline int
 181 HYPERVISOR_sched_op_compat(
 182         int cmd, unsigned long arg)
 183 {
 184         return _hypercall2(int, sched_op_compat, cmd, arg);
 185 }
 186
 187 static inline int
 188 HYPERVISOR_sched_op(
 189         int cmd, void *arg)
 190 {
 191         return _hypercall2(int, sched_op, cmd, arg);
 192 }
 193
 194 static inline long
 195 HYPERVISOR_set_timer_op(
 196         u64 timeout)
 197 {
 198         unsigned long timeout_hi = (unsigned long)(timeout>>32);
 199         unsigned long timeout_lo = (unsigned long)timeout;
 200         return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 201 }
 202
 203 static inline int
 204 HYPERVISOR_dom0_op(
 205         dom0_op_t *dom0_op)
 206 {
 207         dom0_op->interface_version = DOM0_INTERFACE_VERSION;
 208         return _hypercall1(int, dom0_op, dom0_op);
 209 }
 210
 211 static inline int
 212 HYPERVISOR_set_debugreg(
 213         int reg, unsigned long value)
 214 {
 215         return _hypercall2(int, set_debugreg, reg, value);
 216 }
 217
 218 static inline unsigned long
 219 HYPERVISOR_get_debugreg(
 220         int reg)
 221 {
 222         return _hypercall1(unsigned long, get_debugreg, reg);
 223 }
 224
 225 static inline int
 226 HYPERVISOR_update_descriptor(
 227         u64 ma, u64 desc)
 228 {
 229         return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
 230 }
 231
 232 static inline int
 233 HYPERVISOR_memory_op(
 234         unsigned int cmd, void *arg)
 235 {
 236         return _hypercall2(int, memory_op, cmd, arg);
 237 }
 238
 239 static inline int
 240 HYPERVISOR_multicall(
 241         void *call_list, int nr_calls)
 242 {
 243         return _hypercall2(int, multicall, call_list, nr_calls);
 244 }
 245
 246 static inline int
 247 HYPERVISOR_update_va_mapping(
 248         unsigned long va, pte_t new_val, unsigned long flags)
 249 {
 250         unsigned long pte_hi = 0;
 251 #ifdef CONFIG_X86_PAE
 252         pte_hi = new_val.pte_high;
 253 #endif
 254         return _hypercall4(int, update_va_mapping, va,
 255                            new_val.pte_low, pte_hi, flags);
 256 }
 257
 258 static inline int
 259 HYPERVISOR_event_channel_op(
 260         int cmd, void *arg)
 261 {
 262         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 263         if (unlikely(rc == -ENOSYS)) {
 264                 struct evtchn_op op;
 265                 op.cmd = cmd;
 266                 memcpy(&op.u, arg, sizeof(op.u));
 267                 rc = _hypercall1(int, event_channel_op_compat, &op);
 268                 memcpy(arg, &op.u, sizeof(op.u));
 269         }
 270         return rc;
 271 }
 272
 273 static inline int
 274 HYPERVISOR_acm_op(
 275         int cmd, void *arg)
 276 {
 277         return _hypercall2(int, acm_op, cmd, arg);
 278 }
 279
 280 static inline int
 281 HYPERVISOR_xen_version(
 282         int cmd, void *arg)
 283 {
 284         return _hypercall2(int, xen_version, cmd, arg);
 285 }
 286
 287 static inline int
 288 HYPERVISOR_console_io(
 289         int cmd, int count, char *str)
 290 {
 291         return _hypercall3(int, console_io, cmd, count, str);
 292 }
 293
 294 static inline int
 295 HYPERVISOR_physdev_op(
 296         int cmd, void *arg)
 297 {
 298         int rc = _hypercall2(int, physdev_op, cmd, arg);
 299         if (unlikely(rc == -ENOSYS)) {
 300                 struct physdev_op op;
 301                 op.cmd = cmd;
 302                 memcpy(&op.u, arg, sizeof(op.u));
 303                 rc = _hypercall1(int, physdev_op_compat, &op);
 304                 memcpy(arg, &op.u, sizeof(op.u));
 305         }
 306         return rc;
 307 }
 308
 309 static inline int
 310 HYPERVISOR_grant_table_op(
 311         unsigned int cmd, void *uop, unsigned int count)
 312 {
 313         return _hypercall3(int, grant_table_op, cmd, uop, count);
 314 }
 315
 316 static inline int
 317 HYPERVISOR_update_va_mapping_otherdomain(
 318         unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
 319 {
 320         unsigned long pte_hi = 0;
 321 #ifdef CONFIG_X86_PAE
 322         pte_hi = new_val.pte_high;
 323 #endif
 324         return _hypercall5(int, update_va_mapping_otherdomain, va,
 325                            new_val.pte_low, pte_hi, flags, domid);
 326 }
 327
 328 static inline int
 329 HYPERVISOR_vm_assist(
 330         unsigned int cmd, unsigned int type)
 331 {
 332         return _hypercall2(int, vm_assist, cmd, type);
 333 }
 334
 335 static inline int
 336 HYPERVISOR_vcpu_op(
 337         int cmd, int vcpuid, void *extra_args)
 338 {
 339         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 340 }
 341
 342 static inline int
 343 HYPERVISOR_suspend(
 344         unsigned long srec)
 345 {
 346         struct sched_shutdown sched_shutdown = {
 347                 .reason = SHUTDOWN_suspend
 348         };
 349
 350         int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
 351                              &sched_shutdown, srec);
 352
 353         if (rc == -ENOSYS)
 354                 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
 355                                  SHUTDOWN_suspend, srec);
 356
 357         return rc;
 358 }
 359
 360 static inline int
 361 HYPERVISOR_nmi_op(
 362         unsigned long op, void *arg)
 363 {
 364         return _hypercall2(int, nmi_op, op, arg);
 365 }
 366
 367 static inline unsigned long
 368 HYPERVISOR_hvm_op(
 369     int op, void *arg)
 370 {
 371     return _hypercall2(unsigned long, hvm_op, op, arg);
 372 }
 373
 374 static inline int
 375 HYPERVISOR_callback_op(
 376         int cmd, void *arg)
 377 {
 378         return _hypercall2(int, callback_op, cmd, arg);
 379 }
 380
 381 static inline int
 382 HYPERVISOR_xenoprof_op(
 383         int op, void *arg)
 384 {
 385         return _hypercall2(int, xenoprof_op, op, arg);
 386 }
 387
 388
 389 #endif /* __HYPERCALL_H__ */