include/asm-i386/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  * 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 __HYPERCALL_H__
  34 #define __HYPERCALL_H__
  35
  36 #include <linux/string.h> /* memcpy() */
  37
  38 #ifndef __HYPERVISOR_H__
  39 # error "please don't include this file directly"
  40 #endif
  41
  42 #define __STR(x) #x
  43 #define STR(x) __STR(x)
  44
  45 #define _hypercall0(type, name)                 \
  46 ({                                              \
  47         long __res;                             \
  48         asm volatile (                          \
  49                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  50                 : "=a" (__res)                  \
  51                 :                               \
  52                 : "memory" );                   \
  53         (type)__res;                            \
  54 })
  55
  56 #define _hypercall1(type, name, a1)                             \
  57 ({                                                              \
  58         long __res, __ign1;                                     \
  59         asm volatile (                                          \
  60                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  61                 : "=a" (__res), "=b" (__ign1)                   \
  62                 : "1" ((long)(a1))                              \
  63                 : "memory" );                                   \
  64         (type)__res;                                            \
  65 })
  66
  67 #define _hypercall2(type, name, a1, a2)                         \
  68 ({                                                              \
  69         long __res, __ign1, __ign2;                             \
  70         asm volatile (                                          \
  71                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  72                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2)    \
  73                 : "1" ((long)(a1)), "2" ((long)(a2))            \
  74                 : "memory" );                                   \
  75         (type)__res;                                            \
  76 })
  77
  78 #define _hypercall3(type, name, a1, a2, a3)                     \
  79 ({                                                              \
  80         long __res, __ign1, __ign2, __ign3;                     \
  81         asm volatile (                                          \
  82                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  83                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
  84                 "=d" (__ign3)                                   \
  85                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
  86                 "3" ((long)(a3))                                \
  87                 : "memory" );                                   \
  88         (type)__res;                                            \
  89 })
  90
  91 #define _hypercall4(type, name, a1, a2, a3, a4)                 \
  92 ({                                                              \
  93         long __res, __ign1, __ign2, __ign3, __ign4;             \
  94         asm volatile (                                          \
  95                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
  96                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
  97                 "=d" (__ign3), "=S" (__ign4)                    \
  98                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
  99                 "3" ((long)(a3)), "4" ((long)(a4))              \
 100                 : "memory" );                                   \
 101         (type)__res;                                            \
 102 })
 103
 104 #define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
 105 ({                                                              \
 106         long __res, __ign1, __ign2, __ign3, __ign4, __ign5;     \
 107         asm volatile (                                          \
 108                 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
 109                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
 110                 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)     \
 111                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 112                 "3" ((long)(a3)), "4" ((long)(a4)),             \
 113                 "5" ((long)(a5))                                \
 114                 : "memory" );                                   \
 115         (type)__res;                                            \
 116 })
 117
 118 static inline int
 119 HYPERVISOR_set_trap_table(
 120         trap_info_t *table)
 121 {
 122         return _hypercall1(int, set_trap_table, table);
 123 }
 124
 125 static inline int
 126 HYPERVISOR_mmu_update(
 127         mmu_update_t *req, int count, int *success_count, domid_t domid)
 128 {
 129         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 130 }
 131
 132 static inline int
 133 HYPERVISOR_mmuext_op(
 134         struct mmuext_op *op, int count, int *success_count, domid_t domid)
 135 {
 136         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 137 }
 138
 139 static inline int
 140 HYPERVISOR_set_gdt(
 141         unsigned long *frame_list, int entries)
 142 {
 143         return _hypercall2(int, set_gdt, frame_list, entries);
 144 }
 145
 146 static inline int
 147 HYPERVISOR_stack_switch(
 148         unsigned long ss, unsigned long esp)
 149 {
 150         return _hypercall2(int, stack_switch, ss, esp);
 151 }
 152
 153 static inline int
 154 HYPERVISOR_set_callbacks(
 155         unsigned long event_selector, unsigned long event_address,
 156         unsigned long failsafe_selector, unsigned long failsafe_address)
 157 {
 158         return _hypercall4(int, set_callbacks,
 159                            event_selector, event_address,
 160                            failsafe_selector, failsafe_address);
 161 }
 162
 163 static inline int
 164 HYPERVISOR_fpu_taskswitch(
 165         int set)
 166 {
 167         return _hypercall1(int, fpu_taskswitch, set);
 168 }
 169
 170 static inline int
 171 HYPERVISOR_sched_op_compat(
 172         int cmd, unsigned long arg)
 173 {
 174         return _hypercall2(int, sched_op_compat, cmd, arg);
 175 }
 176
 177 static inline int
 178 HYPERVISOR_sched_op(
 179         int cmd, void *arg)
 180 {
 181         return _hypercall2(int, sched_op, cmd, arg);
 182 }
 183
 184 static inline long
 185 HYPERVISOR_set_timer_op(
 186         u64 timeout)
 187 {
 188         unsigned long timeout_hi = (unsigned long)(timeout>>32);
 189         unsigned long timeout_lo = (unsigned long)timeout;
 190         return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 191 }
 192
 193 static inline int
 194 HYPERVISOR_dom0_op(
 195         dom0_op_t *dom0_op)
 196 {
 197         dom0_op->interface_version = DOM0_INTERFACE_VERSION;
 198         return _hypercall1(int, dom0_op, dom0_op);
 199 }
 200
 201 static inline int
 202 HYPERVISOR_set_debugreg(
 203         int reg, unsigned long value)
 204 {
 205         return _hypercall2(int, set_debugreg, reg, value);
 206 }
 207
 208 static inline unsigned long
 209 HYPERVISOR_get_debugreg(
 210         int reg)
 211 {
 212         return _hypercall1(unsigned long, get_debugreg, reg);
 213 }
 214
 215 static inline int
 216 HYPERVISOR_update_descriptor(
 217         u64 ma, u64 desc)
 218 {
 219         return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
 220 }
 221
 222 static inline int
 223 HYPERVISOR_memory_op(
 224         unsigned int cmd, void *arg)
 225 {
 226         return _hypercall2(int, memory_op, cmd, arg);
 227 }
 228
 229 static inline int
 230 HYPERVISOR_multicall(
 231         void *call_list, int nr_calls)
 232 {
 233         return _hypercall2(int, multicall, call_list, nr_calls);
 234 }
 235
 236 static inline int
 237 HYPERVISOR_update_va_mapping(
 238         unsigned long va, pte_t new_val, unsigned long flags)
 239 {
 240         unsigned long pte_hi = 0;
 241 #ifdef CONFIG_X86_PAE
 242         pte_hi = new_val.pte_high;
 243 #endif
 244         return _hypercall4(int, update_va_mapping, va,
 245                            new_val.pte_low, pte_hi, flags);
 246 }
 247
 248 static inline int
 249 HYPERVISOR_event_channel_op(
 250         int cmd, void *arg)
 251 {
 252         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 253         if (unlikely(rc == -ENOSYS)) {
 254                 struct evtchn_op op;
 255                 op.cmd = cmd;
 256                 memcpy(&op.u, arg, sizeof(op.u));
 257                 rc = _hypercall1(int, event_channel_op_compat, &op);
 258                 memcpy(arg, &op.u, sizeof(op.u));
 259         }
 260         return rc;
 261 }
 262
 263 static inline int
 264 HYPERVISOR_acm_op(
 265         int cmd, void *arg)
 266 {
 267         return _hypercall2(int, acm_op, cmd, arg);
 268 }
 269
 270 static inline int
 271 HYPERVISOR_xen_version(
 272         int cmd, void *arg)
 273 {
 274         return _hypercall2(int, xen_version, cmd, arg);
 275 }
 276
 277 static inline int
 278 HYPERVISOR_console_io(
 279         int cmd, int count, char *str)
 280 {
 281         return _hypercall3(int, console_io, cmd, count, str);
 282 }
 283
 284 static inline int
 285 HYPERVISOR_physdev_op(
 286         int cmd, void *arg)
 287 {
 288         int rc = _hypercall2(int, physdev_op, cmd, arg);
 289         if (unlikely(rc == -ENOSYS)) {
 290                 struct physdev_op op;
 291                 op.cmd = cmd;
 292                 memcpy(&op.u, arg, sizeof(op.u));
 293                 rc = _hypercall1(int, physdev_op_compat, &op);
 294                 memcpy(arg, &op.u, sizeof(op.u));
 295         }
 296         return rc;
 297 }
 298
 299 static inline int
 300 HYPERVISOR_grant_table_op(
 301         unsigned int cmd, void *uop, unsigned int count)
 302 {
 303         return _hypercall3(int, grant_table_op, cmd, uop, count);
 304 }
 305
 306 static inline int
 307 HYPERVISOR_update_va_mapping_otherdomain(
 308         unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
 309 {
 310         unsigned long pte_hi = 0;
 311 #ifdef CONFIG_X86_PAE
 312         pte_hi = new_val.pte_high;
 313 #endif
 314         return _hypercall5(int, update_va_mapping_otherdomain, va,
 315                            new_val.pte_low, pte_hi, flags, domid);
 316 }
 317
 318 static inline int
 319 HYPERVISOR_vm_assist(
 320         unsigned int cmd, unsigned int type)
 321 {
 322         return _hypercall2(int, vm_assist, cmd, type);
 323 }
 324
 325 static inline int
 326 HYPERVISOR_vcpu_op(
 327         int cmd, int vcpuid, void *extra_args)
 328 {
 329         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 330 }
 331
 332 static inline int
 333 HYPERVISOR_suspend(
 334         unsigned long srec)
 335 {
 336         struct sched_shutdown sched_shutdown = {
 337                 .reason = SHUTDOWN_suspend
 338         };
 339
 340         int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
 341                              &sched_shutdown, srec);
 342
 343         if (rc == -ENOSYS)
 344                 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
 345                                  SHUTDOWN_suspend, srec);
 346
 347         return rc;
 348 }
 349
 350 static inline int
 351 HYPERVISOR_nmi_op(
 352         unsigned long op, void *arg)
 353 {
 354         return _hypercall2(int, nmi_op, op, arg);
 355 }
 356
 357 static inline int
 358 HYPERVISOR_callback_op(
 359         int cmd, void *arg)
 360 {
 361         return _hypercall2(int, callback_op, cmd, arg);
 362 }
 363
 364 static inline int
 365 HYPERVISOR_xenoprof_op(
 366         int op, void *arg)
 367 {
 368         return _hypercall2(int, xenoprof_op, op, arg);
 369 }
 370
 371
 372 #endif /* __HYPERCALL_H__ */