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 #define _hypercall0(type, name)                 \
  50 ({                                              \
  51         long __res;                             \
  52         asm volatile (                          \
  53                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  54                 : "=a" (__res)                  \
  55                 :                               \
  56                 : "memory" );                   \
  57         (type)__res;                            \
  58 })
  59
  60 #define _hypercall1(type, name, a1)                             \
  61 ({                                                              \
  62         long __res, __ign1;                                     \
  63         asm volatile (                                          \
  64                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  65                 : "=a" (__res), "=D" (__ign1)                   \
  66                 : "1" ((long)(a1))                              \
  67                 : "memory" );                                   \
  68         (type)__res;                                            \
  69 })
  70
  71 #define _hypercall2(type, name, a1, a2)                         \
  72 ({                                                              \
  73         long __res, __ign1, __ign2;                             \
  74         asm volatile (                                          \
  75                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  76                 : "=a" (__res), "=D" (__ign1), "=S" (__ign2)    \
  77                 : "1" ((long)(a1)), "2" ((long)(a2))            \
  78                 : "memory" );                                   \
  79         (type)__res;                                            \
  80 })
  81
  82 #define _hypercall3(type, name, a1, a2, a3)                     \
  83 ({                                                              \
  84         long __res, __ign1, __ign2, __ign3;                     \
  85         asm volatile (                                          \
  86                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  87                 : "=a" (__res), "=D" (__ign1), "=S" (__ign2),   \
  88                 "=d" (__ign3)                                   \
  89                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
  90                 "3" ((long)(a3))                                \
  91                 : "memory" );                                   \
  92         (type)__res;                                            \
  93 })
  94
  95 #define _hypercall4(type, name, a1, a2, a3, a4)                 \
  96 ({                                                              \
  97         long __res, __ign1, __ign2, __ign3;                     \
  98         asm volatile (                                          \
  99                 "movq %7,%%r10; "                               \
 100                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
 101                 : "=a" (__res), "=D" (__ign1), "=S" (__ign2),   \
 102                 "=d" (__ign3)                                   \
 103                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 104                 "3" ((long)(a3)), "g" ((long)(a4))              \
 105                 : "memory", "r10" );                            \
 106         (type)__res;                                            \
 107 })
 108
 109 #define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
 110 ({                                                              \
 111         long __res, __ign1, __ign2, __ign3;                     \
 112         asm volatile (                                          \
 113                 "movq %7,%%r10; movq %8,%%r8; "                 \
 114                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
 115                 : "=a" (__res), "=D" (__ign1), "=S" (__ign2),   \
 116                 "=d" (__ign3)                                   \
 117                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 118                 "3" ((long)(a3)), "g" ((long)(a4)),             \
 119                 "g" ((long)(a5))                                \
 120                 : "memory", "r10", "r8" );                      \
 121         (type)__res;                                            \
 122 })
 123
 124 static inline int
 125 HYPERVISOR_set_trap_table(
 126         trap_info_t *table)
 127 {
 128         return _hypercall1(int, set_trap_table, table);
 129 }
 130
 131 static inline int
 132 HYPERVISOR_mmu_update(
 133         mmu_update_t *req, int count, int *success_count, domid_t domid)
 134 {
 135         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 136 }
 137
 138 static inline int
 139 HYPERVISOR_mmuext_op(
 140         struct mmuext_op *op, int count, int *success_count, domid_t domid)
 141 {
 142         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 143 }
 144
 145 static inline int
 146 HYPERVISOR_set_gdt(
 147         unsigned long *frame_list, int entries)
 148 {
 149         return _hypercall2(int, set_gdt, frame_list, entries);
 150 }
 151
 152 static inline int
 153 HYPERVISOR_stack_switch(
 154         unsigned long ss, unsigned long esp)
 155 {
 156         return _hypercall2(int, stack_switch, ss, esp);
 157 }
 158
 159 static inline int
 160 HYPERVISOR_set_callbacks(
 161         unsigned long event_address, unsigned long failsafe_address,
 162         unsigned long syscall_address)
 163 {
 164         return _hypercall3(int, set_callbacks,
 165                            event_address, failsafe_address, syscall_address);
 166 }
 167
 168 static inline int
 169 HYPERVISOR_fpu_taskswitch(
 170         int set)
 171 {
 172         return _hypercall1(int, fpu_taskswitch, set);
 173 }
 174
 175 static inline int
 176 HYPERVISOR_sched_op_compat(
 177         int cmd, unsigned long arg)
 178 {
 179         return _hypercall2(int, sched_op_compat, cmd, arg);
 180 }
 181
 182 static inline int
 183 HYPERVISOR_sched_op(
 184         int cmd, void *arg)
 185 {
 186         return _hypercall2(int, sched_op, cmd, arg);
 187 }
 188
 189 static inline long
 190 HYPERVISOR_set_timer_op(
 191         u64 timeout)
 192 {
 193         return _hypercall1(long, set_timer_op, timeout);
 194 }
 195
 196 static inline int
 197 HYPERVISOR_dom0_op(
 198         dom0_op_t *dom0_op)
 199 {
 200         dom0_op->interface_version = DOM0_INTERFACE_VERSION;
 201         return _hypercall1(int, dom0_op, dom0_op);
 202 }
 203
 204 static inline int
 205 HYPERVISOR_set_debugreg(
 206         int reg, unsigned long value)
 207 {
 208         return _hypercall2(int, set_debugreg, reg, value);
 209 }
 210
 211 static inline unsigned long
 212 HYPERVISOR_get_debugreg(
 213         int reg)
 214 {
 215         return _hypercall1(unsigned long, get_debugreg, reg);
 216 }
 217
 218 static inline int
 219 HYPERVISOR_update_descriptor(
 220         unsigned long ma, unsigned long word)
 221 {
 222         return _hypercall2(int, update_descriptor, ma, word);
 223 }
 224
 225 static inline int
 226 HYPERVISOR_memory_op(
 227         unsigned int cmd, void *arg)
 228 {
 229         return _hypercall2(int, memory_op, cmd, arg);
 230 }
 231
 232 static inline int
 233 HYPERVISOR_multicall(
 234         void *call_list, int nr_calls)
 235 {
 236         return _hypercall2(int, multicall, call_list, nr_calls);
 237 }
 238
 239 static inline int
 240 HYPERVISOR_update_va_mapping(
 241         unsigned long va, pte_t new_val, unsigned long flags)
 242 {
 243         return _hypercall3(int, update_va_mapping, va, new_val.pte, flags);
 244 }
 245
 246 static inline int
 247 HYPERVISOR_event_channel_op(
 248         int cmd, void *arg)
 249 {
 250         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 251         if (unlikely(rc == -ENOSYS)) {
 252                 struct evtchn_op op;
 253                 op.cmd = cmd;
 254                 memcpy(&op.u, arg, sizeof(op.u));
 255                 rc = _hypercall1(int, event_channel_op_compat, &op);
 256                 memcpy(arg, &op.u, sizeof(op.u));
 257         }
 258         return rc;
 259 }
 260
 261 static inline int
 262 HYPERVISOR_acm_op(
 263         int cmd, void *arg)
 264 {
 265         return _hypercall2(int, acm_op, cmd, arg);
 266 }
 267
 268 static inline int
 269 HYPERVISOR_xen_version(
 270         int cmd, void *arg)
 271 {
 272         return _hypercall2(int, xen_version, cmd, arg);
 273 }
 274
 275 static inline int
 276 HYPERVISOR_console_io(
 277         int cmd, int count, char *str)
 278 {
 279         return _hypercall3(int, console_io, cmd, count, str);
 280 }
 281
 282 static inline int
 283 HYPERVISOR_physdev_op(
 284         int cmd, void *arg)
 285 {
 286         int rc = _hypercall2(int, physdev_op, cmd, arg);
 287         if (unlikely(rc == -ENOSYS)) {
 288                 struct physdev_op op;
 289                 op.cmd = cmd;
 290                 memcpy(&op.u, arg, sizeof(op.u));
 291                 rc = _hypercall1(int, physdev_op_compat, &op);
 292                 memcpy(arg, &op.u, sizeof(op.u));
 293         }
 294         return rc;
 295 }
 296
 297 static inline int
 298 HYPERVISOR_grant_table_op(
 299         unsigned int cmd, void *uop, unsigned int count)
 300 {
 301         return _hypercall3(int, grant_table_op, cmd, uop, count);
 302 }
 303
 304 static inline int
 305 HYPERVISOR_update_va_mapping_otherdomain(
 306         unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
 307 {
 308         return _hypercall4(int, update_va_mapping_otherdomain, va,
 309                            new_val.pte, flags, domid);
 310 }
 311
 312 static inline int
 313 HYPERVISOR_vm_assist(
 314         unsigned int cmd, unsigned int type)
 315 {
 316         return _hypercall2(int, vm_assist, cmd, type);
 317 }
 318
 319 static inline int
 320 HYPERVISOR_vcpu_op(
 321         int cmd, int vcpuid, void *extra_args)
 322 {
 323         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 324 }
 325
 326 static inline int
 327 HYPERVISOR_set_segment_base(
 328         int reg, unsigned long value)
 329 {
 330         return _hypercall2(int, set_segment_base, reg, value);
 331 }
 332
 333 static inline int
 334 HYPERVISOR_suspend(
 335         unsigned long srec)
 336 {
 337         struct sched_shutdown sched_shutdown = {
 338                 .reason = SHUTDOWN_suspend
 339         };
 340
 341         int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
 342                              &sched_shutdown, srec);
 343
 344         if (rc == -ENOSYS)
 345                 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
 346                                  SHUTDOWN_suspend, srec);
 347
 348         return rc;
 349 }
 350
 351 static inline int
 352 HYPERVISOR_nmi_op(
 353         unsigned long op, void *arg)
 354 {
 355         return _hypercall2(int, nmi_op, op, arg);
 356 }
 357
 358 static inline int
 359 HYPERVISOR_callback_op(
 360         int cmd, void *arg)
 361 {
 362         return _hypercall2(int, callback_op, cmd, arg);
 363 }
 364
 365 static inline int
 366 HYPERVISOR_xenoprof_op(
 367         int op, void *arg)
 368 {
 369         return _hypercall2(int, xenoprof_op, op, arg);
 370 }
 371
 372 #endif /* __HYPERCALL_H__ */