include/asm-x86_64/mach-xen/asm/hypercall.h

   1 /******************************************************************************
   2  * hypercall.h
   3  *
   4  * Linux-specific hypervisor handling.
   5  *
   6  * Copyright (c) 2002-2004, K A Fraser
   7  *
   8  * 64-bit updates:
   9  *   Benjamin Liu <benjamin.liu@intel.com>
  10  *   Jun Nakajima <jun.nakajima@intel.com>
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License version 2
  14  * as published by the Free Software Foundation; or, when distributed
  15  * separately from the Linux kernel or incorporated into other
  16  * software packages, subject to the following license:
  17  *
  18  * Permission is hereby granted, free of charge, to any person obtaining a copy
  19  * of this source file (the "Software"), to deal in the Software without
  20  * restriction, including without limitation the rights to use, copy, modify,
  21  * merge, publish, distribute, sublicense, and/or sell copies of the Software,
  22  * and to permit persons to whom the Software is furnished to do so, subject to
  23  * the following conditions:
  24  *
  25  * The above copyright notice and this permission notice shall be included in
  26  * all copies or substantial portions of the Software.
  27  *
  28  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  29  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  30  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  31  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  32  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  33  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  34  * IN THE SOFTWARE.
  35  */
  36
  37 #ifndef __HYPERCALL_H__
  38 #define __HYPERCALL_H__
  39
  40 #include <linux/string.h> /* memcpy() */
  41
  42 #ifndef __HYPERVISOR_H__
  43 # error "please don't include this file directly"
  44 #endif
  45
  46 #define __STR(x) #x
  47 #define STR(x) __STR(x)
  48
  49 #ifdef CONFIG_XEN
  50 #define HYPERCALL_STR(name)                                     \
  51         "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
  52 #else
  53 #define HYPERCALL_STR(name)                                     \
  54         "mov hypercall_stubs,%%rax; "                           \
  55         "add $("STR(__HYPERVISOR_##name)" * 32),%%rax; "        \
  56         "call *%%rax"
  57 #endif
  58
  59 #define _hypercall0(type, name)                 \
  60 ({                                              \
  61         long __res;                             \
  62         asm volatile (                          \
  63                 HYPERCALL_STR(name)             \
  64                 : "=a" (__res)                  \
  65                 :                               \
  66                 : "memory" );                   \
  67         (type)__res;                            \
  68 })
  69
  70 #define _hypercall1(type, name, a1)                             \
  71 ({                                                              \
  72         long __res, __ign1;                                     \
  73         asm volatile (                                          \
  74                 HYPERCALL_STR(name)                             \
  75                 : "=a" (__res), "=D" (__ign1)                   \
  76                 : "1" ((long)(a1))                              \
  77                 : "memory" );                                   \
  78         (type)__res;                                            \
  79 })
  80
  81 #define _hypercall2(type, name, a1, a2)                         \
  82 ({                                                              \
  83         long __res, __ign1, __ign2;                             \
  84         asm volatile (                                          \
  85                 HYPERCALL_STR(name)                             \
  86                 : "=a" (__res), "=D" (__ign1), "=S" (__ign2)    \
  87                 : "1" ((long)(a1)), "2" ((long)(a2))            \
  88                 : "memory" );                                   \
  89         (type)__res;                                            \
  90 })
  91
  92 #define _hypercall3(type, name, a1, a2, a3)                     \
  93 ({                                                              \
  94         long __res, __ign1, __ign2, __ign3;                     \
  95         asm volatile (                                          \
  96                 HYPERCALL_STR(name)                             \
  97                 : "=a" (__res), "=D" (__ign1), "=S" (__ign2),   \
  98                 "=d" (__ign3)                                   \
  99                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 100                 "3" ((long)(a3))                                \
 101                 : "memory" );                                   \
 102         (type)__res;                                            \
 103 })
 104
 105 #define _hypercall4(type, name, a1, a2, a3, a4)                 \
 106 ({                                                              \
 107         long __res, __ign1, __ign2, __ign3;                     \
 108         asm volatile (                                          \
 109                 "movq %7,%%r10; "                               \
 110                 HYPERCALL_STR(name)                             \
 111                 : "=a" (__res), "=D" (__ign1), "=S" (__ign2),   \
 112                 "=d" (__ign3)                                   \
 113                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 114                 "3" ((long)(a3)), "g" ((long)(a4))              \
 115                 : "memory", "r10" );                            \
 116         (type)__res;                                            \
 117 })
 118
 119 #define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
 120 ({                                                              \
 121         long __res, __ign1, __ign2, __ign3;                     \
 122         asm volatile (                                          \
 123                 "movq %7,%%r10; movq %8,%%r8; "                 \
 124                 HYPERCALL_STR(name)                             \
 125                 : "=a" (__res), "=D" (__ign1), "=S" (__ign2),   \
 126                 "=d" (__ign3)                                   \
 127                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 128                 "3" ((long)(a3)), "g" ((long)(a4)),             \
 129                 "g" ((long)(a5))                                \
 130                 : "memory", "r10", "r8" );                      \
 131         (type)__res;                                            \
 132 })
 133
 134 static inline int
 135 HYPERVISOR_set_trap_table(
 136         trap_info_t *table)
 137 {
 138         return _hypercall1(int, set_trap_table, table);
 139 }
 140
 141 static inline int
 142 HYPERVISOR_mmu_update(
 143         mmu_update_t *req, int count, int *success_count, domid_t domid)
 144 {
 145         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 146 }
 147
 148 static inline int
 149 HYPERVISOR_mmuext_op(
 150         struct mmuext_op *op, int count, int *success_count, domid_t domid)
 151 {
 152         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 153 }
 154
 155 static inline int
 156 HYPERVISOR_set_gdt(
 157         unsigned long *frame_list, int entries)
 158 {
 159         return _hypercall2(int, set_gdt, frame_list, entries);
 160 }
 161
 162 static inline int
 163 HYPERVISOR_stack_switch(
 164         unsigned long ss, unsigned long esp)
 165 {
 166         return _hypercall2(int, stack_switch, ss, esp);
 167 }
 168
 169 static inline int
 170 HYPERVISOR_set_callbacks(
 171         unsigned long event_address, unsigned long failsafe_address,
 172         unsigned long syscall_address)
 173 {
 174         return _hypercall3(int, set_callbacks,
 175                            event_address, failsafe_address, syscall_address);
 176 }
 177
 178 static inline int
 179 HYPERVISOR_fpu_taskswitch(
 180         int set)
 181 {
 182         return _hypercall1(int, fpu_taskswitch, set);
 183 }
 184
 185 static inline int
 186 HYPERVISOR_sched_op_compat(
 187         int cmd, unsigned long arg)
 188 {
 189         return _hypercall2(int, sched_op_compat, cmd, arg);
 190 }
 191
 192 static inline int
 193 HYPERVISOR_sched_op(
 194         int cmd, void *arg)
 195 {
 196         return _hypercall2(int, sched_op, cmd, arg);
 197 }
 198
 199 static inline long
 200 HYPERVISOR_set_timer_op(
 201         u64 timeout)
 202 {
 203         return _hypercall1(long, set_timer_op, timeout);
 204 }
 205
 206 static inline int
 207 HYPERVISOR_dom0_op(
 208         dom0_op_t *dom0_op)
 209 {
 210         dom0_op->interface_version = DOM0_INTERFACE_VERSION;
 211         return _hypercall1(int, dom0_op, dom0_op);
 212 }
 213
 214 static inline int
 215 HYPERVISOR_set_debugreg(
 216         int reg, unsigned long value)
 217 {
 218         return _hypercall2(int, set_debugreg, reg, value);
 219 }
 220
 221 static inline unsigned long
 222 HYPERVISOR_get_debugreg(
 223         int reg)
 224 {
 225         return _hypercall1(unsigned long, get_debugreg, reg);
 226 }
 227
 228 static inline int
 229 HYPERVISOR_update_descriptor(
 230         unsigned long ma, unsigned long word)
 231 {
 232         return _hypercall2(int, update_descriptor, ma, word);
 233 }
 234
 235 static inline int
 236 HYPERVISOR_memory_op(
 237         unsigned int cmd, void *arg)
 238 {
 239         return _hypercall2(int, memory_op, cmd, arg);
 240 }
 241
 242 static inline int
 243 HYPERVISOR_multicall(
 244         void *call_list, int nr_calls)
 245 {
 246         return _hypercall2(int, multicall, call_list, nr_calls);
 247 }
 248
 249 static inline int
 250 HYPERVISOR_update_va_mapping(
 251         unsigned long va, pte_t new_val, unsigned long flags)
 252 {
 253         return _hypercall3(int, update_va_mapping, va, new_val.pte, flags);
 254 }
 255
 256 static inline int
 257 HYPERVISOR_event_channel_op(
 258         int cmd, void *arg)
 259 {
 260         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 261         if (unlikely(rc == -ENOSYS)) {
 262                 struct evtchn_op op;
 263                 op.cmd = cmd;
 264                 memcpy(&op.u, arg, sizeof(op.u));
 265                 rc = _hypercall1(int, event_channel_op_compat, &op);
 266                 memcpy(arg, &op.u, sizeof(op.u));
 267         }
 268         return rc;
 269 }
 270
 271 static inline int
 272 HYPERVISOR_acm_op(
 273         int cmd, void *arg)
 274 {
 275         return _hypercall2(int, acm_op, cmd, arg);
 276 }
 277
 278 static inline int
 279 HYPERVISOR_xen_version(
 280         int cmd, void *arg)
 281 {
 282         return _hypercall2(int, xen_version, cmd, arg);
 283 }
 284
 285 static inline int
 286 HYPERVISOR_console_io(
 287         int cmd, int count, char *str)
 288 {
 289         return _hypercall3(int, console_io, cmd, count, str);
 290 }
 291
 292 static inline int
 293 HYPERVISOR_physdev_op(
 294         int cmd, void *arg)
 295 {
 296         int rc = _hypercall2(int, physdev_op, cmd, arg);
 297         if (unlikely(rc == -ENOSYS)) {
 298                 struct physdev_op op;
 299                 op.cmd = cmd;
 300                 memcpy(&op.u, arg, sizeof(op.u));
 301                 rc = _hypercall1(int, physdev_op_compat, &op);
 302                 memcpy(arg, &op.u, sizeof(op.u));
 303         }
 304         return rc;
 305 }
 306
 307 static inline int
 308 HYPERVISOR_grant_table_op(
 309         unsigned int cmd, void *uop, unsigned int count)
 310 {
 311         return _hypercall3(int, grant_table_op, cmd, uop, count);
 312 }
 313
 314 static inline int
 315 HYPERVISOR_update_va_mapping_otherdomain(
 316         unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
 317 {
 318         return _hypercall4(int, update_va_mapping_otherdomain, va,
 319                            new_val.pte, flags, domid);
 320 }
 321
 322 static inline int
 323 HYPERVISOR_vm_assist(
 324         unsigned int cmd, unsigned int type)
 325 {
 326         return _hypercall2(int, vm_assist, cmd, type);
 327 }
 328
 329 static inline int
 330 HYPERVISOR_vcpu_op(
 331         int cmd, int vcpuid, void *extra_args)
 332 {
 333         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 334 }
 335
 336 static inline int
 337 HYPERVISOR_set_segment_base(
 338         int reg, unsigned long value)
 339 {
 340         return _hypercall2(int, set_segment_base, reg, value);
 341 }
 342
 343 static inline int
 344 HYPERVISOR_suspend(
 345         unsigned long srec)
 346 {
 347         struct sched_shutdown sched_shutdown = {
 348                 .reason = SHUTDOWN_suspend
 349         };
 350
 351         int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
 352                              &sched_shutdown, srec);
 353
 354         if (rc == -ENOSYS)
 355                 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
 356                                  SHUTDOWN_suspend, srec);
 357
 358         return rc;
 359 }
 360
 361 static inline int
 362 HYPERVISOR_nmi_op(
 363         unsigned long op, void *arg)
 364 {
 365         return _hypercall2(int, nmi_op, op, arg);
 366 }
 367
 368 static inline unsigned long
 369 HYPERVISOR_hvm_op(
 370     int op, void *arg)
 371 {
 372     return _hypercall2(unsigned long, hvm_op, op, arg);
 373 }
 374
 375 static inline int
 376 HYPERVISOR_callback_op(
 377         int cmd, void *arg)
 378 {
 379         return _hypercall2(int, callback_op, cmd, arg);
 380 }
 381
 382 static inline int
 383 HYPERVISOR_xenoprof_op(
 384         int op, void *arg)
 385 {
 386         return _hypercall2(int, xenoprof_op, op, arg);
 387 }
 388
 389 #endif /* __HYPERCALL_H__ */