arch/x86/include/asm/xen/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 _ASM_X86_XEN_HYPERCALL_H
  34 #define _ASM_X86_XEN_HYPERCALL_H
  35
  36 #include <linux/kernel.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/errno.h>
  39 #include <linux/string.h>
  40 #include <linux/types.h>
  41
  42 #include <trace/events/xen.h>
  43
  44 #include <asm/page.h>
  45 #include <asm/pgtable.h>
  46
  47 #include <xen/interface/xen.h>
  48 #include <xen/interface/sched.h>
  49 #include <xen/interface/physdev.h>
  50 #include <xen/interface/platform.h>
  51 #include <xen/interface/xen-mca.h>
  52
  53 /*
  54  * The hypercall asms have to meet several constraints:
  55  * - Work on 32- and 64-bit.
  56  *    The two architectures put their arguments in different sets of
  57  *    registers.
  58  *
  59  * - Work around asm syntax quirks
  60  *    It isn't possible to specify one of the rNN registers in a
  61  *    constraint, so we use explicit register variables to get the
  62  *    args into the right place.
  63  *
  64  * - Mark all registers as potentially clobbered
  65  *    Even unused parameters can be clobbered by the hypervisor, so we
  66  *    need to make sure gcc knows it.
  67  *
  68  * - Avoid compiler bugs.
  69  *    This is the tricky part.  Because x86_32 has such a constrained
  70  *    register set, gcc versions below 4.3 have trouble generating
  71  *    code when all the arg registers and memory are trashed by the
  72  *    asm.  There are syntactically simpler ways of achieving the
  73  *    semantics below, but they cause the compiler to crash.
  74  *
  75  *    The only combination I found which works is:
  76  *     - assign the __argX variables first
  77  *     - list all actually used parameters as "+r" (__argX)
  78  *     - clobber the rest
  79  *
  80  * The result certainly isn't pretty, and it really shows up cpp's
  81  * weakness as as macro language.  Sorry.  (But let's just give thanks
  82  * there aren't more than 5 arguments...)
  83  */
  84
  85 extern struct { char _entry[32]; } hypercall_page[];
  86
  87 #define __HYPERCALL             "call hypercall_page+%c[offset]"
  88 #define __HYPERCALL_ENTRY(x)                                            \
  89         [offset] "i" (__HYPERVISOR_##x * sizeof(hypercall_page[0]))
  90
  91 #ifdef CONFIG_X86_32
  92 #define __HYPERCALL_RETREG      "eax"
  93 #define __HYPERCALL_ARG1REG     "ebx"
  94 #define __HYPERCALL_ARG2REG     "ecx"
  95 #define __HYPERCALL_ARG3REG     "edx"
  96 #define __HYPERCALL_ARG4REG     "esi"
  97 #define __HYPERCALL_ARG5REG     "edi"
  98 #else
  99 #define __HYPERCALL_RETREG      "rax"
 100 #define __HYPERCALL_ARG1REG     "rdi"
 101 #define __HYPERCALL_ARG2REG     "rsi"
 102 #define __HYPERCALL_ARG3REG     "rdx"
 103 #define __HYPERCALL_ARG4REG     "r10"
 104 #define __HYPERCALL_ARG5REG     "r8"
 105 #endif
 106
 107 #define __HYPERCALL_DECLS                                               \
 108         register unsigned long __res  asm(__HYPERCALL_RETREG);          \
 109         register unsigned long __arg1 asm(__HYPERCALL_ARG1REG) = __arg1; \
 110         register unsigned long __arg2 asm(__HYPERCALL_ARG2REG) = __arg2; \
 111         register unsigned long __arg3 asm(__HYPERCALL_ARG3REG) = __arg3; \
 112         register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \
 113         register unsigned long __arg5 asm(__HYPERCALL_ARG5REG) = __arg5;
 114
 115 #define __HYPERCALL_0PARAM      "=r" (__res)
 116 #define __HYPERCALL_1PARAM      __HYPERCALL_0PARAM, "+r" (__arg1)
 117 #define __HYPERCALL_2PARAM      __HYPERCALL_1PARAM, "+r" (__arg2)
 118 #define __HYPERCALL_3PARAM      __HYPERCALL_2PARAM, "+r" (__arg3)
 119 #define __HYPERCALL_4PARAM      __HYPERCALL_3PARAM, "+r" (__arg4)
 120 #define __HYPERCALL_5PARAM      __HYPERCALL_4PARAM, "+r" (__arg5)
 121
 122 #define __HYPERCALL_0ARG()
 123 #define __HYPERCALL_1ARG(a1)                                            \
 124         __HYPERCALL_0ARG()              __arg1 = (unsigned long)(a1);
 125 #define __HYPERCALL_2ARG(a1,a2)                                         \
 126         __HYPERCALL_1ARG(a1)            __arg2 = (unsigned long)(a2);
 127 #define __HYPERCALL_3ARG(a1,a2,a3)                                      \
 128         __HYPERCALL_2ARG(a1,a2)         __arg3 = (unsigned long)(a3);
 129 #define __HYPERCALL_4ARG(a1,a2,a3,a4)                                   \
 130         __HYPERCALL_3ARG(a1,a2,a3)      __arg4 = (unsigned long)(a4);
 131 #define __HYPERCALL_5ARG(a1,a2,a3,a4,a5)                                \
 132         __HYPERCALL_4ARG(a1,a2,a3,a4)   __arg5 = (unsigned long)(a5);
 133
 134 #define __HYPERCALL_CLOBBER5    "memory"
 135 #define __HYPERCALL_CLOBBER4    __HYPERCALL_CLOBBER5, __HYPERCALL_ARG5REG
 136 #define __HYPERCALL_CLOBBER3    __HYPERCALL_CLOBBER4, __HYPERCALL_ARG4REG
 137 #define __HYPERCALL_CLOBBER2    __HYPERCALL_CLOBBER3, __HYPERCALL_ARG3REG
 138 #define __HYPERCALL_CLOBBER1    __HYPERCALL_CLOBBER2, __HYPERCALL_ARG2REG
 139 #define __HYPERCALL_CLOBBER0    __HYPERCALL_CLOBBER1, __HYPERCALL_ARG1REG
 140
 141 #define _hypercall0(type, name)                                         \
 142 ({                                                                      \
 143         __HYPERCALL_DECLS;                                              \
 144         __HYPERCALL_0ARG();                                             \
 145         asm volatile (__HYPERCALL                                       \
 146                       : __HYPERCALL_0PARAM                              \
 147                       : __HYPERCALL_ENTRY(name)                         \
 148                       : __HYPERCALL_CLOBBER0);                          \
 149         (type)__res;                                                    \
 150 })
 151
 152 #define _hypercall1(type, name, a1)                                     \
 153 ({                                                                      \
 154         __HYPERCALL_DECLS;                                              \
 155         __HYPERCALL_1ARG(a1);                                           \
 156         asm volatile (__HYPERCALL                                       \
 157                       : __HYPERCALL_1PARAM                              \
 158                       : __HYPERCALL_ENTRY(name)                         \
 159                       : __HYPERCALL_CLOBBER1);                          \
 160         (type)__res;                                                    \
 161 })
 162
 163 #define _hypercall2(type, name, a1, a2)                                 \
 164 ({                                                                      \
 165         __HYPERCALL_DECLS;                                              \
 166         __HYPERCALL_2ARG(a1, a2);                                       \
 167         asm volatile (__HYPERCALL                                       \
 168                       : __HYPERCALL_2PARAM                              \
 169                       : __HYPERCALL_ENTRY(name)                         \
 170                       : __HYPERCALL_CLOBBER2);                          \
 171         (type)__res;                                                    \
 172 })
 173
 174 #define _hypercall3(type, name, a1, a2, a3)                             \
 175 ({                                                                      \
 176         __HYPERCALL_DECLS;                                              \
 177         __HYPERCALL_3ARG(a1, a2, a3);                                   \
 178         asm volatile (__HYPERCALL                                       \
 179                       : __HYPERCALL_3PARAM                              \
 180                       : __HYPERCALL_ENTRY(name)                         \
 181                       : __HYPERCALL_CLOBBER3);                          \
 182         (type)__res;                                                    \
 183 })
 184
 185 #define _hypercall4(type, name, a1, a2, a3, a4)                         \
 186 ({                                                                      \
 187         __HYPERCALL_DECLS;                                              \
 188         __HYPERCALL_4ARG(a1, a2, a3, a4);                               \
 189         asm volatile (__HYPERCALL                                       \
 190                       : __HYPERCALL_4PARAM                              \
 191                       : __HYPERCALL_ENTRY(name)                         \
 192                       : __HYPERCALL_CLOBBER4);                          \
 193         (type)__res;                                                    \
 194 })
 195
 196 #define _hypercall5(type, name, a1, a2, a3, a4, a5)                     \
 197 ({                                                                      \
 198         __HYPERCALL_DECLS;                                              \
 199         __HYPERCALL_5ARG(a1, a2, a3, a4, a5);                           \
 200         asm volatile (__HYPERCALL                                       \
 201                       : __HYPERCALL_5PARAM                              \
 202                       : __HYPERCALL_ENTRY(name)                         \
 203                       : __HYPERCALL_CLOBBER5);                          \
 204         (type)__res;                                                    \
 205 })
 206
 207 static inline long
 208 privcmd_call(unsigned call,
 209              unsigned long a1, unsigned long a2,
 210              unsigned long a3, unsigned long a4,
 211              unsigned long a5)
 212 {
 213         __HYPERCALL_DECLS;
 214         __HYPERCALL_5ARG(a1, a2, a3, a4, a5);
 215
 216         asm volatile("call *%[call]"
 217                      : __HYPERCALL_5PARAM
 218                      : [call] "a" (&hypercall_page[call])
 219                      : __HYPERCALL_CLOBBER5);
 220
 221         return (long)__res;
 222 }
 223
 224 static inline int
 225 HYPERVISOR_set_trap_table(struct trap_info *table)
 226 {
 227         return _hypercall1(int, set_trap_table, table);
 228 }
 229
 230 static inline int
 231 HYPERVISOR_mmu_update(struct mmu_update *req, int count,
 232                       int *success_count, domid_t domid)
 233 {
 234         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 235 }
 236
 237 static inline int
 238 HYPERVISOR_mmuext_op(struct mmuext_op *op, int count,
 239                      int *success_count, domid_t domid)
 240 {
 241         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 242 }
 243
 244 static inline int
 245 HYPERVISOR_set_gdt(unsigned long *frame_list, int entries)
 246 {
 247         return _hypercall2(int, set_gdt, frame_list, entries);
 248 }
 249
 250 static inline int
 251 HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp)
 252 {
 253         return _hypercall2(int, stack_switch, ss, esp);
 254 }
 255
 256 #ifdef CONFIG_X86_32
 257 static inline int
 258 HYPERVISOR_set_callbacks(unsigned long event_selector,
 259                          unsigned long event_address,
 260                          unsigned long failsafe_selector,
 261                          unsigned long failsafe_address)
 262 {
 263         return _hypercall4(int, set_callbacks,
 264                            event_selector, event_address,
 265                            failsafe_selector, failsafe_address);
 266 }
 267 #else  /* CONFIG_X86_64 */
 268 static inline int
 269 HYPERVISOR_set_callbacks(unsigned long event_address,
 270                         unsigned long failsafe_address,
 271                         unsigned long syscall_address)
 272 {
 273         return _hypercall3(int, set_callbacks,
 274                            event_address, failsafe_address,
 275                            syscall_address);
 276 }
 277 #endif  /* CONFIG_X86_{32,64} */
 278
 279 static inline int
 280 HYPERVISOR_callback_op(int cmd, void *arg)
 281 {
 282         return _hypercall2(int, callback_op, cmd, arg);
 283 }
 284
 285 static inline int
 286 HYPERVISOR_fpu_taskswitch(int set)
 287 {
 288         return _hypercall1(int, fpu_taskswitch, set);
 289 }
 290
 291 static inline int
 292 HYPERVISOR_sched_op(int cmd, void *arg)
 293 {
 294         return _hypercall2(int, sched_op, cmd, arg);
 295 }
 296
 297 static inline long
 298 HYPERVISOR_set_timer_op(u64 timeout)
 299 {
 300         unsigned long timeout_hi = (unsigned long)(timeout>>32);
 301         unsigned long timeout_lo = (unsigned long)timeout;
 302         return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 303 }
 304
 305 static inline int
 306 HYPERVISOR_mca(struct xen_mc *mc_op)
 307 {
 308         mc_op->interface_version = XEN_MCA_INTERFACE_VERSION;
 309         return _hypercall1(int, mca, mc_op);
 310 }
 311
 312 static inline int
 313 HYPERVISOR_dom0_op(struct xen_platform_op *platform_op)
 314 {
 315         platform_op->interface_version = XENPF_INTERFACE_VERSION;
 316         return _hypercall1(int, dom0_op, platform_op);
 317 }
 318
 319 static inline int
 320 HYPERVISOR_set_debugreg(int reg, unsigned long value)
 321 {
 322         return _hypercall2(int, set_debugreg, reg, value);
 323 }
 324
 325 static inline unsigned long
 326 HYPERVISOR_get_debugreg(int reg)
 327 {
 328         return _hypercall1(unsigned long, get_debugreg, reg);
 329 }
 330
 331 static inline int
 332 HYPERVISOR_update_descriptor(u64 ma, u64 desc)
 333 {
 334         if (sizeof(u64) == sizeof(long))
 335                 return _hypercall2(int, update_descriptor, ma, desc);
 336         return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
 337 }
 338
 339 static inline int
 340 HYPERVISOR_memory_op(unsigned int cmd, void *arg)
 341 {
 342         return _hypercall2(int, memory_op, cmd, arg);
 343 }
 344
 345 static inline int
 346 HYPERVISOR_multicall(void *call_list, int nr_calls)
 347 {
 348         return _hypercall2(int, multicall, call_list, nr_calls);
 349 }
 350
 351 static inline int
 352 HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
 353                              unsigned long flags)
 354 {
 355         if (sizeof(new_val) == sizeof(long))
 356                 return _hypercall3(int, update_va_mapping, va,
 357                                    new_val.pte, flags);
 358         else
 359                 return _hypercall4(int, update_va_mapping, va,
 360                                    new_val.pte, new_val.pte >> 32, flags);
 361 }
 362
 363 static inline int
 364 HYPERVISOR_event_channel_op(int cmd, void *arg)
 365 {
 366         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 367         if (unlikely(rc == -ENOSYS)) {
 368                 struct evtchn_op op;
 369                 op.cmd = cmd;
 370                 memcpy(&op.u, arg, sizeof(op.u));
 371                 rc = _hypercall1(int, event_channel_op_compat, &op);
 372                 memcpy(arg, &op.u, sizeof(op.u));
 373         }
 374         return rc;
 375 }
 376
 377 static inline int
 378 HYPERVISOR_xen_version(int cmd, void *arg)
 379 {
 380         return _hypercall2(int, xen_version, cmd, arg);
 381 }
 382
 383 static inline int
 384 HYPERVISOR_console_io(int cmd, int count, char *str)
 385 {
 386         return _hypercall3(int, console_io, cmd, count, str);
 387 }
 388
 389 static inline int
 390 HYPERVISOR_physdev_op(int cmd, void *arg)
 391 {
 392         int rc = _hypercall2(int, physdev_op, cmd, arg);
 393         if (unlikely(rc == -ENOSYS)) {
 394                 struct physdev_op op;
 395                 op.cmd = cmd;
 396                 memcpy(&op.u, arg, sizeof(op.u));
 397                 rc = _hypercall1(int, physdev_op_compat, &op);
 398                 memcpy(arg, &op.u, sizeof(op.u));
 399         }
 400         return rc;
 401 }
 402
 403 static inline int
 404 HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
 405 {
 406         return _hypercall3(int, grant_table_op, cmd, uop, count);
 407 }
 408
 409 static inline int
 410 HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val,
 411                                          unsigned long flags, domid_t domid)
 412 {
 413         if (sizeof(new_val) == sizeof(long))
 414                 return _hypercall4(int, update_va_mapping_otherdomain, va,
 415                                    new_val.pte, flags, domid);
 416         else
 417                 return _hypercall5(int, update_va_mapping_otherdomain, va,
 418                                    new_val.pte, new_val.pte >> 32,
 419                                    flags, domid);
 420 }
 421
 422 static inline int
 423 HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
 424 {
 425         return _hypercall2(int, vm_assist, cmd, type);
 426 }
 427
 428 static inline int
 429 HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
 430 {
 431         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 432 }
 433
 434 #ifdef CONFIG_X86_64
 435 static inline int
 436 HYPERVISOR_set_segment_base(int reg, unsigned long value)
 437 {
 438         return _hypercall2(int, set_segment_base, reg, value);
 439 }
 440 #endif
 441
 442 static inline int
 443 HYPERVISOR_suspend(unsigned long start_info_mfn)
 444 {
 445         struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
 446
 447         /*
 448          * For a PV guest the tools require that the start_info mfn be
 449          * present in rdx/edx when the hypercall is made. Per the
 450          * hypercall calling convention this is the third hypercall
 451          * argument, which is start_info_mfn here.
 452          */
 453         return _hypercall3(int, sched_op, SCHEDOP_shutdown, &r, start_info_mfn);
 454 }
 455
 456 static inline int
 457 HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
 458 {
 459         return _hypercall2(int, nmi_op, op, arg);
 460 }
 461
 462 static inline unsigned long __must_check
 463 HYPERVISOR_hvm_op(int op, void *arg)
 464 {
 465        return _hypercall2(unsigned long, hvm_op, op, arg);
 466 }
 467
 468 static inline int
 469 HYPERVISOR_tmem_op(
 470         struct tmem_op *op)
 471 {
 472         return _hypercall1(int, tmem_op, op);
 473 }
 474
 475 static inline void
 476 MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
 477 {
 478         mcl->op = __HYPERVISOR_fpu_taskswitch;
 479         mcl->args[0] = set;
 480
 481         trace_xen_mc_entry(mcl, 1);
 482 }
 483
 484 static inline void
 485 MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
 486                         pte_t new_val, unsigned long flags)
 487 {
 488         mcl->op = __HYPERVISOR_update_va_mapping;
 489         mcl->args[0] = va;
 490         if (sizeof(new_val) == sizeof(long)) {
 491                 mcl->args[1] = new_val.pte;
 492                 mcl->args[2] = flags;
 493         } else {
 494                 mcl->args[1] = new_val.pte;
 495                 mcl->args[2] = new_val.pte >> 32;
 496                 mcl->args[3] = flags;
 497         }
 498
 499         trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 3 : 4);
 500 }
 501
 502 static inline void
 503 MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
 504                      void *uop, unsigned int count)
 505 {
 506         mcl->op = __HYPERVISOR_grant_table_op;
 507         mcl->args[0] = cmd;
 508         mcl->args[1] = (unsigned long)uop;
 509         mcl->args[2] = count;
 510
 511         trace_xen_mc_entry(mcl, 3);
 512 }
 513
 514 static inline void
 515 MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
 516                                     pte_t new_val, unsigned long flags,
 517                                     domid_t domid)
 518 {
 519         mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
 520         mcl->args[0] = va;
 521         if (sizeof(new_val) == sizeof(long)) {
 522                 mcl->args[1] = new_val.pte;
 523                 mcl->args[2] = flags;
 524                 mcl->args[3] = domid;
 525         } else {
 526                 mcl->args[1] = new_val.pte;
 527                 mcl->args[2] = new_val.pte >> 32;
 528                 mcl->args[3] = flags;
 529                 mcl->args[4] = domid;
 530         }
 531
 532         trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 4 : 5);
 533 }
 534
 535 static inline void
 536 MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
 537                         struct desc_struct desc)
 538 {
 539         mcl->op = __HYPERVISOR_update_descriptor;
 540         if (sizeof(maddr) == sizeof(long)) {
 541                 mcl->args[0] = maddr;
 542                 mcl->args[1] = *(unsigned long *)&desc;
 543         } else {
 544                 mcl->args[0] = maddr;
 545                 mcl->args[1] = maddr >> 32;
 546                 mcl->args[2] = desc.a;
 547                 mcl->args[3] = desc.b;
 548         }
 549
 550         trace_xen_mc_entry(mcl, sizeof(maddr) == sizeof(long) ? 2 : 4);
 551 }
 552
 553 static inline void
 554 MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
 555 {
 556         mcl->op = __HYPERVISOR_memory_op;
 557         mcl->args[0] = cmd;
 558         mcl->args[1] = (unsigned long)arg;
 559
 560         trace_xen_mc_entry(mcl, 2);
 561 }
 562
 563 static inline void
 564 MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
 565                  int count, int *success_count, domid_t domid)
 566 {
 567         mcl->op = __HYPERVISOR_mmu_update;
 568         mcl->args[0] = (unsigned long)req;
 569         mcl->args[1] = count;
 570         mcl->args[2] = (unsigned long)success_count;
 571         mcl->args[3] = domid;
 572
 573         trace_xen_mc_entry(mcl, 4);
 574 }
 575
 576 static inline void
 577 MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
 578                 int *success_count, domid_t domid)
 579 {
 580         mcl->op = __HYPERVISOR_mmuext_op;
 581         mcl->args[0] = (unsigned long)op;
 582         mcl->args[1] = count;
 583         mcl->args[2] = (unsigned long)success_count;
 584         mcl->args[3] = domid;
 585
 586         trace_xen_mc_entry(mcl, 4);
 587 }
 588
 589 static inline void
 590 MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries)
 591 {
 592         mcl->op = __HYPERVISOR_set_gdt;
 593         mcl->args[0] = (unsigned long)frames;
 594         mcl->args[1] = entries;
 595
 596         trace_xen_mc_entry(mcl, 2);
 597 }
 598
 599 static inline void
 600 MULTI_stack_switch(struct multicall_entry *mcl,
 601                    unsigned long ss, unsigned long esp)
 602 {
 603         mcl->op = __HYPERVISOR_stack_switch;
 604         mcl->args[0] = ss;
 605         mcl->args[1] = esp;
 606
 607         trace_xen_mc_entry(mcl, 2);
 608 }
 609
 610 #endif /* _ASM_X86_XEN_HYPERCALL_H */