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