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 #include <asm/smap.h>
  47
  48 #include <xen/interface/xen.h>
  49 #include <xen/interface/sched.h>
  50 #include <xen/interface/physdev.h>
  51 #include <xen/interface/platform.h>
  52 #include <xen/interface/xen-mca.h>
  53
  54 struct xen_dm_op_buf;
  55
  56 /*
  57  * The hypercall asms have to meet several constraints:
  58  * - Work on 32- and 64-bit.
  59  *    The two architectures put their arguments in different sets of
  60  *    registers.
  61  *
  62  * - Work around asm syntax quirks
  63  *    It isn't possible to specify one of the rNN registers in a
  64  *    constraint, so we use explicit register variables to get the
  65  *    args into the right place.
  66  *
  67  * - Mark all registers as potentially clobbered
  68  *    Even unused parameters can be clobbered by the hypervisor, so we
  69  *    need to make sure gcc knows it.
  70  *
  71  * - Avoid compiler bugs.
  72  *    This is the tricky part.  Because x86_32 has such a constrained
  73  *    register set, gcc versions below 4.3 have trouble generating
  74  *    code when all the arg registers and memory are trashed by the
  75  *    asm.  There are syntactically simpler ways of achieving the
  76  *    semantics below, but they cause the compiler to crash.
  77  *
  78  *    The only combination I found which works is:
  79  *     - assign the __argX variables first
  80  *     - list all actually used parameters as "+r" (__argX)
  81  *     - clobber the rest
  82  *
  83  * The result certainly isn't pretty, and it really shows up cpp's
  84  * weakness as as macro language.  Sorry.  (But let's just give thanks
  85  * there aren't more than 5 arguments...)
  86  */
  87
  88 extern struct { char _entry[32]; } hypercall_page[];
  89
  90 #define __HYPERCALL             "call hypercall_page+%c[offset]"
  91 #define __HYPERCALL_ENTRY(x)                                            \
  92         [offset] "i" (__HYPERVISOR_##x * sizeof(hypercall_page[0]))
  93
  94 #ifdef CONFIG_X86_32
  95 #define __HYPERCALL_RETREG      "eax"
  96 #define __HYPERCALL_ARG1REG     "ebx"
  97 #define __HYPERCALL_ARG2REG     "ecx"
  98 #define __HYPERCALL_ARG3REG     "edx"
  99 #define __HYPERCALL_ARG4REG     "esi"
 100 #define __HYPERCALL_ARG5REG     "edi"
 101 #else
 102 #define __HYPERCALL_RETREG      "rax"
 103 #define __HYPERCALL_ARG1REG     "rdi"
 104 #define __HYPERCALL_ARG2REG     "rsi"
 105 #define __HYPERCALL_ARG3REG     "rdx"
 106 #define __HYPERCALL_ARG4REG     "r10"
 107 #define __HYPERCALL_ARG5REG     "r8"
 108 #endif
 109
 110 #define __HYPERCALL_DECLS                                               \
 111         register unsigned long __res  asm(__HYPERCALL_RETREG);          \
 112         register unsigned long __arg1 asm(__HYPERCALL_ARG1REG) = __arg1; \
 113         register unsigned long __arg2 asm(__HYPERCALL_ARG2REG) = __arg2; \
 114         register unsigned long __arg3 asm(__HYPERCALL_ARG3REG) = __arg3; \
 115         register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \
 116         register unsigned long __arg5 asm(__HYPERCALL_ARG5REG) = __arg5;
 117
 118 #define __HYPERCALL_0PARAM      "=r" (__res), ASM_CALL_CONSTRAINT
 119 #define __HYPERCALL_1PARAM      __HYPERCALL_0PARAM, "+r" (__arg1)
 120 #define __HYPERCALL_2PARAM      __HYPERCALL_1PARAM, "+r" (__arg2)
 121 #define __HYPERCALL_3PARAM      __HYPERCALL_2PARAM, "+r" (__arg3)
 122 #define __HYPERCALL_4PARAM      __HYPERCALL_3PARAM, "+r" (__arg4)
 123 #define __HYPERCALL_5PARAM      __HYPERCALL_4PARAM, "+r" (__arg5)
 124
 125 #define __HYPERCALL_0ARG()
 126 #define __HYPERCALL_1ARG(a1)                                            \
 127         __HYPERCALL_0ARG()              __arg1 = (unsigned long)(a1);
 128 #define __HYPERCALL_2ARG(a1,a2)                                         \
 129         __HYPERCALL_1ARG(a1)            __arg2 = (unsigned long)(a2);
 130 #define __HYPERCALL_3ARG(a1,a2,a3)                                      \
 131         __HYPERCALL_2ARG(a1,a2)         __arg3 = (unsigned long)(a3);
 132 #define __HYPERCALL_4ARG(a1,a2,a3,a4)                                   \
 133         __HYPERCALL_3ARG(a1,a2,a3)      __arg4 = (unsigned long)(a4);
 134 #define __HYPERCALL_5ARG(a1,a2,a3,a4,a5)                                \
 135         __HYPERCALL_4ARG(a1,a2,a3,a4)   __arg5 = (unsigned long)(a5);
 136
 137 #define __HYPERCALL_CLOBBER5    "memory"
 138 #define __HYPERCALL_CLOBBER4    __HYPERCALL_CLOBBER5, __HYPERCALL_ARG5REG
 139 #define __HYPERCALL_CLOBBER3    __HYPERCALL_CLOBBER4, __HYPERCALL_ARG4REG
 140 #define __HYPERCALL_CLOBBER2    __HYPERCALL_CLOBBER3, __HYPERCALL_ARG3REG
 141 #define __HYPERCALL_CLOBBER1    __HYPERCALL_CLOBBER2, __HYPERCALL_ARG2REG
 142 #define __HYPERCALL_CLOBBER0    __HYPERCALL_CLOBBER1, __HYPERCALL_ARG1REG
 143
 144 #define _hypercall0(type, name)                                         \
 145 ({                                                                      \
 146         __HYPERCALL_DECLS;                                              \
 147         __HYPERCALL_0ARG();                                             \
 148         asm volatile (__HYPERCALL                                       \
 149                       : __HYPERCALL_0PARAM                              \
 150                       : __HYPERCALL_ENTRY(name)                         \
 151                       : __HYPERCALL_CLOBBER0);                          \
 152         (type)__res;                                                    \
 153 })
 154
 155 #define _hypercall1(type, name, a1)                                     \
 156 ({                                                                      \
 157         __HYPERCALL_DECLS;                                              \
 158         __HYPERCALL_1ARG(a1);                                           \
 159         asm volatile (__HYPERCALL                                       \
 160                       : __HYPERCALL_1PARAM                              \
 161                       : __HYPERCALL_ENTRY(name)                         \
 162                       : __HYPERCALL_CLOBBER1);                          \
 163         (type)__res;                                                    \
 164 })
 165
 166 #define _hypercall2(type, name, a1, a2)                                 \
 167 ({                                                                      \
 168         __HYPERCALL_DECLS;                                              \
 169         __HYPERCALL_2ARG(a1, a2);                                       \
 170         asm volatile (__HYPERCALL                                       \
 171                       : __HYPERCALL_2PARAM                              \
 172                       : __HYPERCALL_ENTRY(name)                         \
 173                       : __HYPERCALL_CLOBBER2);                          \
 174         (type)__res;                                                    \
 175 })
 176
 177 #define _hypercall3(type, name, a1, a2, a3)                             \
 178 ({                                                                      \
 179         __HYPERCALL_DECLS;                                              \
 180         __HYPERCALL_3ARG(a1, a2, a3);                                   \
 181         asm volatile (__HYPERCALL                                       \
 182                       : __HYPERCALL_3PARAM                              \
 183                       : __HYPERCALL_ENTRY(name)                         \
 184                       : __HYPERCALL_CLOBBER3);                          \
 185         (type)__res;                                                    \
 186 })
 187
 188 #define _hypercall4(type, name, a1, a2, a3, a4)                         \
 189 ({                                                                      \
 190         __HYPERCALL_DECLS;                                              \
 191         __HYPERCALL_4ARG(a1, a2, a3, a4);                               \
 192         asm volatile (__HYPERCALL                                       \
 193                       : __HYPERCALL_4PARAM                              \
 194                       : __HYPERCALL_ENTRY(name)                         \
 195                       : __HYPERCALL_CLOBBER4);                          \
 196         (type)__res;                                                    \
 197 })
 198
 199 #define _hypercall5(type, name, a1, a2, a3, a4, a5)                     \
 200 ({                                                                      \
 201         __HYPERCALL_DECLS;                                              \
 202         __HYPERCALL_5ARG(a1, a2, a3, a4, a5);                           \
 203         asm volatile (__HYPERCALL                                       \
 204                       : __HYPERCALL_5PARAM                              \
 205                       : __HYPERCALL_ENTRY(name)                         \
 206                       : __HYPERCALL_CLOBBER5);                          \
 207         (type)__res;                                                    \
 208 })
 209
 210 static inline long
 211 privcmd_call(unsigned call,
 212              unsigned long a1, unsigned long a2,
 213              unsigned long a3, unsigned long a4,
 214              unsigned long a5)
 215 {
 216         __HYPERCALL_DECLS;
 217         __HYPERCALL_5ARG(a1, a2, a3, a4, a5);
 218
 219         stac();
 220         asm volatile("call *%[call]"
 221                      : __HYPERCALL_5PARAM
 222                      : [call] "a" (&hypercall_page[call])
 223                      : __HYPERCALL_CLOBBER5);
 224         clac();
 225
 226         return (long)__res;
 227 }
 228
 229 static inline int
 230 HYPERVISOR_set_trap_table(struct trap_info *table)
 231 {
 232         return _hypercall1(int, set_trap_table, table);
 233 }
 234
 235 static inline int
 236 HYPERVISOR_mmu_update(struct mmu_update *req, int count,
 237                       int *success_count, domid_t domid)
 238 {
 239         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 240 }
 241
 242 static inline int
 243 HYPERVISOR_mmuext_op(struct mmuext_op *op, int count,
 244                      int *success_count, domid_t domid)
 245 {
 246         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 247 }
 248
 249 static inline int
 250 HYPERVISOR_set_gdt(unsigned long *frame_list, int entries)
 251 {
 252         return _hypercall2(int, set_gdt, frame_list, entries);
 253 }
 254
 255 static inline int
 256 HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp)
 257 {
 258         return _hypercall2(int, stack_switch, ss, esp);
 259 }
 260
 261 #ifdef CONFIG_X86_32
 262 static inline int
 263 HYPERVISOR_set_callbacks(unsigned long event_selector,
 264                          unsigned long event_address,
 265                          unsigned long failsafe_selector,
 266                          unsigned long failsafe_address)
 267 {
 268         return _hypercall4(int, set_callbacks,
 269                            event_selector, event_address,
 270                            failsafe_selector, failsafe_address);
 271 }
 272 #else  /* CONFIG_X86_64 */
 273 static inline int
 274 HYPERVISOR_set_callbacks(unsigned long event_address,
 275                         unsigned long failsafe_address,
 276                         unsigned long syscall_address)
 277 {
 278         return _hypercall3(int, set_callbacks,
 279                            event_address, failsafe_address,
 280                            syscall_address);
 281 }
 282 #endif  /* CONFIG_X86_{32,64} */
 283
 284 static inline int
 285 HYPERVISOR_callback_op(int cmd, void *arg)
 286 {
 287         return _hypercall2(int, callback_op, cmd, arg);
 288 }
 289
 290 static inline int
 291 HYPERVISOR_fpu_taskswitch(int set)
 292 {
 293         return _hypercall1(int, fpu_taskswitch, set);
 294 }
 295
 296 static inline int
 297 HYPERVISOR_sched_op(int cmd, void *arg)
 298 {
 299         return _hypercall2(int, sched_op, cmd, arg);
 300 }
 301
 302 static inline long
 303 HYPERVISOR_set_timer_op(u64 timeout)
 304 {
 305         unsigned long timeout_hi = (unsigned long)(timeout>>32);
 306         unsigned long timeout_lo = (unsigned long)timeout;
 307         return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 308 }
 309
 310 static inline int
 311 HYPERVISOR_mca(struct xen_mc *mc_op)
 312 {
 313         mc_op->interface_version = XEN_MCA_INTERFACE_VERSION;
 314         return _hypercall1(int, mca, mc_op);
 315 }
 316
 317 static inline int
 318 HYPERVISOR_platform_op(struct xen_platform_op *op)
 319 {
 320         op->interface_version = XENPF_INTERFACE_VERSION;
 321         return _hypercall1(int, platform_op, op);
 322 }
 323
 324 static inline int
 325 HYPERVISOR_set_debugreg(int reg, unsigned long value)
 326 {
 327         return _hypercall2(int, set_debugreg, reg, value);
 328 }
 329
 330 static inline unsigned long
 331 HYPERVISOR_get_debugreg(int reg)
 332 {
 333         return _hypercall1(unsigned long, get_debugreg, reg);
 334 }
 335
 336 static inline int
 337 HYPERVISOR_update_descriptor(u64 ma, u64 desc)
 338 {
 339         if (sizeof(u64) == sizeof(long))
 340                 return _hypercall2(int, update_descriptor, ma, desc);
 341         return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
 342 }
 343
 344 static inline long
 345 HYPERVISOR_memory_op(unsigned int cmd, void *arg)
 346 {
 347         return _hypercall2(long, memory_op, cmd, arg);
 348 }
 349
 350 static inline int
 351 HYPERVISOR_multicall(void *call_list, uint32_t nr_calls)
 352 {
 353         return _hypercall2(int, multicall, call_list, nr_calls);
 354 }
 355
 356 static inline int
 357 HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
 358                              unsigned long flags)
 359 {
 360         if (sizeof(new_val) == sizeof(long))
 361                 return _hypercall3(int, update_va_mapping, va,
 362                                    new_val.pte, flags);
 363         else
 364                 return _hypercall4(int, update_va_mapping, va,
 365                                    new_val.pte, new_val.pte >> 32, flags);
 366 }
 367 extern int __must_check xen_event_channel_op_compat(int, void *);
 368
 369 static inline int
 370 HYPERVISOR_event_channel_op(int cmd, void *arg)
 371 {
 372         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 373         if (unlikely(rc == -ENOSYS))
 374                 rc = xen_event_channel_op_compat(cmd, arg);
 375         return rc;
 376 }
 377
 378 static inline int
 379 HYPERVISOR_xen_version(int cmd, void *arg)
 380 {
 381         return _hypercall2(int, xen_version, cmd, arg);
 382 }
 383
 384 static inline int
 385 HYPERVISOR_console_io(int cmd, int count, char *str)
 386 {
 387         return _hypercall3(int, console_io, cmd, count, str);
 388 }
 389
 390 extern int __must_check xen_physdev_op_compat(int, void *);
 391
 392 static inline int
 393 HYPERVISOR_physdev_op(int cmd, void *arg)
 394 {
 395         int rc = _hypercall2(int, physdev_op, cmd, arg);
 396         if (unlikely(rc == -ENOSYS))
 397                 rc = xen_physdev_op_compat(cmd, arg);
 398         return rc;
 399 }
 400
 401 static inline int
 402 HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
 403 {
 404         return _hypercall3(int, grant_table_op, cmd, uop, count);
 405 }
 406
 407 static inline int
 408 HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val,
 409                                          unsigned long flags, domid_t domid)
 410 {
 411         if (sizeof(new_val) == sizeof(long))
 412                 return _hypercall4(int, update_va_mapping_otherdomain, va,
 413                                    new_val.pte, flags, domid);
 414         else
 415                 return _hypercall5(int, update_va_mapping_otherdomain, va,
 416                                    new_val.pte, new_val.pte >> 32,
 417                                    flags, domid);
 418 }
 419
 420 static inline int
 421 HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
 422 {
 423         return _hypercall2(int, vm_assist, cmd, type);
 424 }
 425
 426 static inline int
 427 HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
 428 {
 429         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 430 }
 431
 432 #ifdef CONFIG_X86_64
 433 static inline int
 434 HYPERVISOR_set_segment_base(int reg, unsigned long value)
 435 {
 436         return _hypercall2(int, set_segment_base, reg, value);
 437 }
 438 #endif
 439
 440 static inline int
 441 HYPERVISOR_suspend(unsigned long start_info_mfn)
 442 {
 443         struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
 444
 445         /*
 446          * For a PV guest the tools require that the start_info mfn be
 447          * present in rdx/edx when the hypercall is made. Per the
 448          * hypercall calling convention this is the third hypercall
 449          * argument, which is start_info_mfn here.
 450          */
 451         return _hypercall3(int, sched_op, SCHEDOP_shutdown, &r, start_info_mfn);
 452 }
 453
 454 static inline int
 455 HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
 456 {
 457         return _hypercall2(int, nmi_op, op, arg);
 458 }
 459
 460 static inline unsigned long __must_check
 461 HYPERVISOR_hvm_op(int op, void *arg)
 462 {
 463        return _hypercall2(unsigned long, hvm_op, op, arg);
 464 }
 465
 466 static inline int
 467 HYPERVISOR_tmem_op(
 468         struct tmem_op *op)
 469 {
 470         return _hypercall1(int, tmem_op, op);
 471 }
 472
 473 static inline int
 474 HYPERVISOR_xenpmu_op(unsigned int op, void *arg)
 475 {
 476         return _hypercall2(int, xenpmu_op, op, arg);
 477 }
 478
 479 static inline int
 480 HYPERVISOR_dm_op(
 481         domid_t dom, unsigned int nr_bufs, struct xen_dm_op_buf *bufs)
 482 {
 483         int ret;
 484         stac();
 485         ret = _hypercall3(int, dm_op, dom, nr_bufs, bufs);
 486         clac();
 487         return ret;
 488 }
 489
 490 static inline void
 491 MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
 492 {
 493         mcl->op = __HYPERVISOR_fpu_taskswitch;
 494         mcl->args[0] = set;
 495
 496         trace_xen_mc_entry(mcl, 1);
 497 }
 498
 499 static inline void
 500 MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
 501                         pte_t new_val, unsigned long flags)
 502 {
 503         mcl->op = __HYPERVISOR_update_va_mapping;
 504         mcl->args[0] = va;
 505         if (sizeof(new_val) == sizeof(long)) {
 506                 mcl->args[1] = new_val.pte;
 507                 mcl->args[2] = flags;
 508         } else {
 509                 mcl->args[1] = new_val.pte;
 510                 mcl->args[2] = new_val.pte >> 32;
 511                 mcl->args[3] = flags;
 512         }
 513
 514         trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 3 : 4);
 515 }
 516
 517 static inline void
 518 MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
 519                      void *uop, unsigned int count)
 520 {
 521         mcl->op = __HYPERVISOR_grant_table_op;
 522         mcl->args[0] = cmd;
 523         mcl->args[1] = (unsigned long)uop;
 524         mcl->args[2] = count;
 525
 526         trace_xen_mc_entry(mcl, 3);
 527 }
 528
 529 static inline void
 530 MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
 531                                     pte_t new_val, unsigned long flags,
 532                                     domid_t domid)
 533 {
 534         mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
 535         mcl->args[0] = va;
 536         if (sizeof(new_val) == sizeof(long)) {
 537                 mcl->args[1] = new_val.pte;
 538                 mcl->args[2] = flags;
 539                 mcl->args[3] = domid;
 540         } else {
 541                 mcl->args[1] = new_val.pte;
 542                 mcl->args[2] = new_val.pte >> 32;
 543                 mcl->args[3] = flags;
 544                 mcl->args[4] = domid;
 545         }
 546
 547         trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 4 : 5);
 548 }
 549
 550 static inline void
 551 MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
 552                         struct desc_struct desc)
 553 {
 554         mcl->op = __HYPERVISOR_update_descriptor;
 555         if (sizeof(maddr) == sizeof(long)) {
 556                 mcl->args[0] = maddr;
 557                 mcl->args[1] = *(unsigned long *)&desc;
 558         } else {
 559                 u32 *p = (u32 *)&desc;
 560
 561                 mcl->args[0] = maddr;
 562                 mcl->args[1] = maddr >> 32;
 563                 mcl->args[2] = *p++;
 564                 mcl->args[3] = *p;
 565         }
 566
 567         trace_xen_mc_entry(mcl, sizeof(maddr) == sizeof(long) ? 2 : 4);
 568 }
 569
 570 static inline void
 571 MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
 572 {
 573         mcl->op = __HYPERVISOR_memory_op;
 574         mcl->args[0] = cmd;
 575         mcl->args[1] = (unsigned long)arg;
 576
 577         trace_xen_mc_entry(mcl, 2);
 578 }
 579
 580 static inline void
 581 MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
 582                  int count, int *success_count, domid_t domid)
 583 {
 584         mcl->op = __HYPERVISOR_mmu_update;
 585         mcl->args[0] = (unsigned long)req;
 586         mcl->args[1] = count;
 587         mcl->args[2] = (unsigned long)success_count;
 588         mcl->args[3] = domid;
 589
 590         trace_xen_mc_entry(mcl, 4);
 591 }
 592
 593 static inline void
 594 MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
 595                 int *success_count, domid_t domid)
 596 {
 597         mcl->op = __HYPERVISOR_mmuext_op;
 598         mcl->args[0] = (unsigned long)op;
 599         mcl->args[1] = count;
 600         mcl->args[2] = (unsigned long)success_count;
 601         mcl->args[3] = domid;
 602
 603         trace_xen_mc_entry(mcl, 4);
 604 }
 605
 606 static inline void
 607 MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries)
 608 {
 609         mcl->op = __HYPERVISOR_set_gdt;
 610         mcl->args[0] = (unsigned long)frames;
 611         mcl->args[1] = entries;
 612
 613         trace_xen_mc_entry(mcl, 2);
 614 }
 615
 616 static inline void
 617 MULTI_stack_switch(struct multicall_entry *mcl,
 618                    unsigned long ss, unsigned long esp)
 619 {
 620         mcl->op = __HYPERVISOR_stack_switch;
 621         mcl->args[0] = ss;
 622         mcl->args[1] = esp;
 623
 624         trace_xen_mc_entry(mcl, 2);
 625 }
 626
 627 #endif /* _ASM_X86_XEN_HYPERCALL_H */