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         if (call >= PAGE_SIZE / sizeof(hypercall_page[0]))
 221                 return -EINVAL;
 222
 223         stac();
 224         asm volatile(CALL_NOSPEC
 225                      : __HYPERCALL_5PARAM
 226                      : [thunk_target] "a" (&hypercall_page[call])
 227                      : __HYPERCALL_CLOBBER5);
 228         clac();
 229
 230         return (long)__res;
 231 }
 232
 233 static inline int
 234 HYPERVISOR_set_trap_table(struct trap_info *table)
 235 {
 236         return _hypercall1(int, set_trap_table, table);
 237 }
 238
 239 static inline int
 240 HYPERVISOR_mmu_update(struct mmu_update *req, int count,
 241                       int *success_count, domid_t domid)
 242 {
 243         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 244 }
 245
 246 static inline int
 247 HYPERVISOR_mmuext_op(struct mmuext_op *op, int count,
 248                      int *success_count, domid_t domid)
 249 {
 250         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 251 }
 252
 253 static inline int
 254 HYPERVISOR_set_gdt(unsigned long *frame_list, int entries)
 255 {
 256         return _hypercall2(int, set_gdt, frame_list, entries);
 257 }
 258
 259 static inline int
 260 HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp)
 261 {
 262         return _hypercall2(int, stack_switch, ss, esp);
 263 }
 264
 265 #ifdef CONFIG_X86_32
 266 static inline int
 267 HYPERVISOR_set_callbacks(unsigned long event_selector,
 268                          unsigned long event_address,
 269                          unsigned long failsafe_selector,
 270                          unsigned long failsafe_address)
 271 {
 272         return _hypercall4(int, set_callbacks,
 273                            event_selector, event_address,
 274                            failsafe_selector, failsafe_address);
 275 }
 276 #else  /* CONFIG_X86_64 */
 277 static inline int
 278 HYPERVISOR_set_callbacks(unsigned long event_address,
 279                         unsigned long failsafe_address,
 280                         unsigned long syscall_address)
 281 {
 282         return _hypercall3(int, set_callbacks,
 283                            event_address, failsafe_address,
 284                            syscall_address);
 285 }
 286 #endif  /* CONFIG_X86_{32,64} */
 287
 288 static inline int
 289 HYPERVISOR_callback_op(int cmd, void *arg)
 290 {
 291         return _hypercall2(int, callback_op, cmd, arg);
 292 }
 293
 294 static inline int
 295 HYPERVISOR_fpu_taskswitch(int set)
 296 {
 297         return _hypercall1(int, fpu_taskswitch, set);
 298 }
 299
 300 static inline int
 301 HYPERVISOR_sched_op(int cmd, void *arg)
 302 {
 303         return _hypercall2(int, sched_op, cmd, arg);
 304 }
 305
 306 static inline long
 307 HYPERVISOR_set_timer_op(u64 timeout)
 308 {
 309         unsigned long timeout_hi = (unsigned long)(timeout>>32);
 310         unsigned long timeout_lo = (unsigned long)timeout;
 311         return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 312 }
 313
 314 static inline int
 315 HYPERVISOR_mca(struct xen_mc *mc_op)
 316 {
 317         mc_op->interface_version = XEN_MCA_INTERFACE_VERSION;
 318         return _hypercall1(int, mca, mc_op);
 319 }
 320
 321 static inline int
 322 HYPERVISOR_platform_op(struct xen_platform_op *op)
 323 {
 324         op->interface_version = XENPF_INTERFACE_VERSION;
 325         return _hypercall1(int, platform_op, op);
 326 }
 327
 328 static inline int
 329 HYPERVISOR_set_debugreg(int reg, unsigned long value)
 330 {
 331         return _hypercall2(int, set_debugreg, reg, value);
 332 }
 333
 334 static inline unsigned long
 335 HYPERVISOR_get_debugreg(int reg)
 336 {
 337         return _hypercall1(unsigned long, get_debugreg, reg);
 338 }
 339
 340 static inline int
 341 HYPERVISOR_update_descriptor(u64 ma, u64 desc)
 342 {
 343         if (sizeof(u64) == sizeof(long))
 344                 return _hypercall2(int, update_descriptor, ma, desc);
 345         return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
 346 }
 347
 348 static inline long
 349 HYPERVISOR_memory_op(unsigned int cmd, void *arg)
 350 {
 351         return _hypercall2(long, memory_op, cmd, arg);
 352 }
 353
 354 static inline int
 355 HYPERVISOR_multicall(void *call_list, uint32_t nr_calls)
 356 {
 357         return _hypercall2(int, multicall, call_list, nr_calls);
 358 }
 359
 360 static inline int
 361 HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
 362                              unsigned long flags)
 363 {
 364         if (sizeof(new_val) == sizeof(long))
 365                 return _hypercall3(int, update_va_mapping, va,
 366                                    new_val.pte, flags);
 367         else
 368                 return _hypercall4(int, update_va_mapping, va,
 369                                    new_val.pte, new_val.pte >> 32, flags);
 370 }
 371 extern int __must_check xen_event_channel_op_compat(int, void *);
 372
 373 static inline int
 374 HYPERVISOR_event_channel_op(int cmd, void *arg)
 375 {
 376         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 377         if (unlikely(rc == -ENOSYS))
 378                 rc = xen_event_channel_op_compat(cmd, arg);
 379         return rc;
 380 }
 381
 382 static inline int
 383 HYPERVISOR_xen_version(int cmd, void *arg)
 384 {
 385         return _hypercall2(int, xen_version, cmd, arg);
 386 }
 387
 388 static inline int
 389 HYPERVISOR_console_io(int cmd, int count, char *str)
 390 {
 391         return _hypercall3(int, console_io, cmd, count, str);
 392 }
 393
 394 extern int __must_check xen_physdev_op_compat(int, void *);
 395
 396 static inline int
 397 HYPERVISOR_physdev_op(int cmd, void *arg)
 398 {
 399         int rc = _hypercall2(int, physdev_op, cmd, arg);
 400         if (unlikely(rc == -ENOSYS))
 401                 rc = xen_physdev_op_compat(cmd, arg);
 402         return rc;
 403 }
 404
 405 static inline int
 406 HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
 407 {
 408         return _hypercall3(int, grant_table_op, cmd, uop, count);
 409 }
 410
 411 static inline int
 412 HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val,
 413                                          unsigned long flags, domid_t domid)
 414 {
 415         if (sizeof(new_val) == sizeof(long))
 416                 return _hypercall4(int, update_va_mapping_otherdomain, va,
 417                                    new_val.pte, flags, domid);
 418         else
 419                 return _hypercall5(int, update_va_mapping_otherdomain, va,
 420                                    new_val.pte, new_val.pte >> 32,
 421                                    flags, domid);
 422 }
 423
 424 static inline int
 425 HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
 426 {
 427         return _hypercall2(int, vm_assist, cmd, type);
 428 }
 429
 430 static inline int
 431 HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
 432 {
 433         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 434 }
 435
 436 #ifdef CONFIG_X86_64
 437 static inline int
 438 HYPERVISOR_set_segment_base(int reg, unsigned long value)
 439 {
 440         return _hypercall2(int, set_segment_base, reg, value);
 441 }
 442 #endif
 443
 444 static inline int
 445 HYPERVISOR_suspend(unsigned long start_info_mfn)
 446 {
 447         struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
 448
 449         /*
 450          * For a PV guest the tools require that the start_info mfn be
 451          * present in rdx/edx when the hypercall is made. Per the
 452          * hypercall calling convention this is the third hypercall
 453          * argument, which is start_info_mfn here.
 454          */
 455         return _hypercall3(int, sched_op, SCHEDOP_shutdown, &r, start_info_mfn);
 456 }
 457
 458 static inline int
 459 HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
 460 {
 461         return _hypercall2(int, nmi_op, op, arg);
 462 }
 463
 464 static inline unsigned long __must_check
 465 HYPERVISOR_hvm_op(int op, void *arg)
 466 {
 467        return _hypercall2(unsigned long, hvm_op, op, arg);
 468 }
 469
 470 static inline int
 471 HYPERVISOR_tmem_op(
 472         struct tmem_op *op)
 473 {
 474         return _hypercall1(int, tmem_op, op);
 475 }
 476
 477 static inline int
 478 HYPERVISOR_xenpmu_op(unsigned int op, void *arg)
 479 {
 480         return _hypercall2(int, xenpmu_op, op, arg);
 481 }
 482
 483 static inline int
 484 HYPERVISOR_dm_op(
 485         domid_t dom, unsigned int nr_bufs, struct xen_dm_op_buf *bufs)
 486 {
 487         int ret;
 488         stac();
 489         ret = _hypercall3(int, dm_op, dom, nr_bufs, bufs);
 490         clac();
 491         return ret;
 492 }
 493
 494 static inline void
 495 MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
 496 {
 497         mcl->op = __HYPERVISOR_fpu_taskswitch;
 498         mcl->args[0] = set;
 499
 500         trace_xen_mc_entry(mcl, 1);
 501 }
 502
 503 static inline void
 504 MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
 505                         pte_t new_val, unsigned long flags)
 506 {
 507         mcl->op = __HYPERVISOR_update_va_mapping;
 508         mcl->args[0] = va;
 509         if (sizeof(new_val) == sizeof(long)) {
 510                 mcl->args[1] = new_val.pte;
 511                 mcl->args[2] = flags;
 512         } else {
 513                 mcl->args[1] = new_val.pte;
 514                 mcl->args[2] = new_val.pte >> 32;
 515                 mcl->args[3] = flags;
 516         }
 517
 518         trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 3 : 4);
 519 }
 520
 521 static inline void
 522 MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
 523                      void *uop, unsigned int count)
 524 {
 525         mcl->op = __HYPERVISOR_grant_table_op;
 526         mcl->args[0] = cmd;
 527         mcl->args[1] = (unsigned long)uop;
 528         mcl->args[2] = count;
 529
 530         trace_xen_mc_entry(mcl, 3);
 531 }
 532
 533 static inline void
 534 MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
 535                                     pte_t new_val, unsigned long flags,
 536                                     domid_t domid)
 537 {
 538         mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
 539         mcl->args[0] = va;
 540         if (sizeof(new_val) == sizeof(long)) {
 541                 mcl->args[1] = new_val.pte;
 542                 mcl->args[2] = flags;
 543                 mcl->args[3] = domid;
 544         } else {
 545                 mcl->args[1] = new_val.pte;
 546                 mcl->args[2] = new_val.pte >> 32;
 547                 mcl->args[3] = flags;
 548                 mcl->args[4] = domid;
 549         }
 550
 551         trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 4 : 5);
 552 }
 553
 554 static inline void
 555 MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
 556                         struct desc_struct desc)
 557 {
 558         mcl->op = __HYPERVISOR_update_descriptor;
 559         if (sizeof(maddr) == sizeof(long)) {
 560                 mcl->args[0] = maddr;
 561                 mcl->args[1] = *(unsigned long *)&desc;
 562         } else {
 563                 u32 *p = (u32 *)&desc;
 564
 565                 mcl->args[0] = maddr;
 566                 mcl->args[1] = maddr >> 32;
 567                 mcl->args[2] = *p++;
 568                 mcl->args[3] = *p;
 569         }
 570
 571         trace_xen_mc_entry(mcl, sizeof(maddr) == sizeof(long) ? 2 : 4);
 572 }
 573
 574 static inline void
 575 MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
 576 {
 577         mcl->op = __HYPERVISOR_memory_op;
 578         mcl->args[0] = cmd;
 579         mcl->args[1] = (unsigned long)arg;
 580
 581         trace_xen_mc_entry(mcl, 2);
 582 }
 583
 584 static inline void
 585 MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
 586                  int count, int *success_count, domid_t domid)
 587 {
 588         mcl->op = __HYPERVISOR_mmu_update;
 589         mcl->args[0] = (unsigned long)req;
 590         mcl->args[1] = count;
 591         mcl->args[2] = (unsigned long)success_count;
 592         mcl->args[3] = domid;
 593
 594         trace_xen_mc_entry(mcl, 4);
 595 }
 596
 597 static inline void
 598 MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
 599                 int *success_count, domid_t domid)
 600 {
 601         mcl->op = __HYPERVISOR_mmuext_op;
 602         mcl->args[0] = (unsigned long)op;
 603         mcl->args[1] = count;
 604         mcl->args[2] = (unsigned long)success_count;
 605         mcl->args[3] = domid;
 606
 607         trace_xen_mc_entry(mcl, 4);
 608 }
 609
 610 static inline void
 611 MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries)
 612 {
 613         mcl->op = __HYPERVISOR_set_gdt;
 614         mcl->args[0] = (unsigned long)frames;
 615         mcl->args[1] = entries;
 616
 617         trace_xen_mc_entry(mcl, 2);
 618 }
 619
 620 static inline void
 621 MULTI_stack_switch(struct multicall_entry *mcl,
 622                    unsigned long ss, unsigned long esp)
 623 {
 624         mcl->op = __HYPERVISOR_stack_switch;
 625         mcl->args[0] = ss;
 626         mcl->args[1] = esp;
 627
 628         trace_xen_mc_entry(mcl, 2);
 629 }
 630
 631 #endif /* _ASM_X86_XEN_HYPERCALL_H */