sys/i386/include/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 file may be distributed separately from the Linux kernel, or
   9  * incorporated into other software packages, subject to the following license:
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a copy
  12  * of this source file (the "Software"), to deal in the Software without
  13  * restriction, including without limitation the rights to use, copy, modify,
  14  * merge, publish, distribute, sublicense, and/or sell copies of the Software,
  15  * and to permit persons to whom the Software is furnished to do so, subject to
  16  * the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included in
  19  * all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  24  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  26  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  27  * IN THE SOFTWARE.
  28  */
  29
  30 #ifndef __HYPERCALL_H__
  31 #define __HYPERCALL_H__
  32
  33 #include <sys/systm.h>
  34 #include <xen/interface/xen.h>
  35 #include <xen/interface/sched.h>
  36
  37 extern char *hypercall_page;
  38
  39 #define __STR(x) #x
  40 #define STR(x) __STR(x)
  41 #define ENOXENSYS       38
  42 #define CONFIG_XEN_COMPAT       0x030002
  43
  44 #define HYPERCALL_STR(name)                                     \
  45         "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
  46
  47 #define _hypercall0(type, name)                 \
  48 ({                                              \
  49         long __res;                             \
  50         __asm__ volatile (                          \
  51                 HYPERCALL_STR(name)             \
  52                 : "=a" (__res)                  \
  53                 :                               \
  54                 : "memory" );                   \
  55         (type)__res;                            \
  56 })
  57
  58 #define _hypercall1(type, name, a1)                             \
  59 ({                                                              \
  60         long __res, __ign1;                                     \
  61         __asm__ volatile (                                          \
  62                 HYPERCALL_STR(name)                             \
  63                 : "=a" (__res), "=b" (__ign1)                   \
  64                 : "1" ((long)(a1))                              \
  65                 : "memory" );                                   \
  66         (type)__res;                                            \
  67 })
  68
  69 #define _hypercall2(type, name, a1, a2)                         \
  70 ({                                                              \
  71         long __res, __ign1, __ign2;                             \
  72         __asm__ volatile (                                          \
  73                 HYPERCALL_STR(name)                             \
  74                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2)    \
  75                 : "1" ((long)(a1)), "2" ((long)(a2))            \
  76                 : "memory" );                                   \
  77         (type)__res;                                            \
  78 })
  79
  80 #define _hypercall3(type, name, a1, a2, a3)                     \
  81 ({                                                              \
  82         long __res, __ign1, __ign2, __ign3;                     \
  83         __asm__ volatile (                                          \
  84                 HYPERCALL_STR(name)                             \
  85                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
  86                 "=d" (__ign3)                                   \
  87                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
  88                 "3" ((long)(a3))                                \
  89                 : "memory" );                                   \
  90         (type)__res;                                            \
  91 })
  92
  93 #define _hypercall4(type, name, a1, a2, a3, a4)                 \
  94 ({                                                              \
  95         long __res, __ign1, __ign2, __ign3, __ign4;             \
  96         __asm__ volatile (                                          \
  97                 HYPERCALL_STR(name)                             \
  98                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
  99                 "=d" (__ign3), "=S" (__ign4)                    \
 100                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 101                 "3" ((long)(a3)), "4" ((long)(a4))              \
 102                 : "memory" );                                   \
 103         (type)__res;                                            \
 104 })
 105
 106 #define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
 107 ({                                                              \
 108         long __res, __ign1, __ign2, __ign3, __ign4, __ign5;     \
 109         __asm__ volatile (                                          \
 110                 HYPERCALL_STR(name)                             \
 111                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
 112                 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)     \
 113                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 114                 "3" ((long)(a3)), "4" ((long)(a4)),             \
 115                 "5" ((long)(a5))                                \
 116                 : "memory" );                                   \
 117         (type)__res;                                            \
 118 })
 119
 120 static inline long
 121 privcmd_hypercall(long op, long a1, long a2, long a3, long a4, long a5)
 122 {
 123         long __res, __ign1, __ign2, __ign3, __ign4, __ign5, __call;
 124
 125         __call = (long)&hypercall_page + (op * 32);
 126         __asm__ volatile (
 127                 "call *%[call]"
 128                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),
 129                 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)
 130                 : "1" ((long)(a1)), "2" ((long)(a2)),
 131                 "3" ((long)(a3)), "4" ((long)(a4)),
 132                 "5" ((long)(a5)), [call] "a" (__call)
 133                 : "memory" );
 134
 135         return __res;
 136 }
 137
 138 static inline int
 139 HYPERVISOR_set_trap_table(
 140         trap_info_t *table)
 141 {
 142         return _hypercall1(int, set_trap_table, table);
 143 }
 144
 145 static inline int
 146 HYPERVISOR_mmu_update(
 147         mmu_update_t *req, int count, int *success_count, domid_t domid)
 148 {
 149         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 150 }
 151
 152 static inline int
 153 HYPERVISOR_mmuext_op(
 154         mmuext_op_t *op, int count, int *success_count, domid_t domid)
 155 {
 156         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 157 }
 158
 159 static inline int
 160 HYPERVISOR_set_gdt(
 161         unsigned long *frame_list, int entries)
 162 {
 163         return _hypercall2(int, set_gdt, frame_list, entries);
 164 }
 165
 166 static inline int
 167 HYPERVISOR_stack_switch(
 168         unsigned long ss, unsigned long esp)
 169 {
 170         return _hypercall2(int, stack_switch, ss, esp);
 171 }
 172
 173 static inline int
 174 HYPERVISOR_set_callbacks(
 175         unsigned long event_selector, unsigned long event_address,
 176         unsigned long failsafe_selector, unsigned long failsafe_address)
 177 {
 178         return _hypercall4(int, set_callbacks,
 179                            event_selector, event_address,
 180                            failsafe_selector, failsafe_address);
 181 }
 182
 183 static inline int
 184 HYPERVISOR_fpu_taskswitch(
 185         int set)
 186 {
 187         return _hypercall1(int, fpu_taskswitch, set);
 188 }
 189
 190 static inline int
 191 HYPERVISOR_sched_op_compat(
 192         int cmd, unsigned long arg)
 193 {
 194         return _hypercall2(int, sched_op_compat, cmd, arg);
 195 }
 196
 197 static inline int
 198 HYPERVISOR_sched_op(
 199         int cmd, void *arg)
 200 {
 201         return _hypercall2(int, sched_op, cmd, arg);
 202 }
 203
 204 static inline long
 205 HYPERVISOR_set_timer_op(
 206         uint64_t timeout)
 207 {
 208         unsigned long timeout_hi = (unsigned long)(timeout>>32);
 209         unsigned long timeout_lo = (unsigned long)timeout;
 210         return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 211 }
 212
 213 static inline int
 214 HYPERVISOR_platform_op(
 215         struct xen_platform_op *platform_op)
 216 {
 217         platform_op->interface_version = XENPF_INTERFACE_VERSION;
 218         return _hypercall1(int, platform_op, platform_op);
 219 }
 220
 221 static inline int
 222 HYPERVISOR_set_debugreg(
 223         int reg, unsigned long value)
 224 {
 225         return _hypercall2(int, set_debugreg, reg, value);
 226 }
 227
 228 static inline unsigned long
 229 HYPERVISOR_get_debugreg(
 230         int reg)
 231 {
 232         return _hypercall1(unsigned long, get_debugreg, reg);
 233 }
 234
 235 static inline int
 236 HYPERVISOR_update_descriptor(
 237         uint64_t ma, uint64_t desc)
 238 {
 239         return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
 240 }
 241
 242 static inline int
 243 HYPERVISOR_memory_op(
 244         unsigned int cmd, void *arg)
 245 {
 246         return _hypercall2(int, memory_op, cmd, arg);
 247 }
 248
 249 static inline int
 250 HYPERVISOR_multicall(
 251         void *call_list, int nr_calls)
 252 {
 253         return _hypercall2(int, multicall, call_list, nr_calls);
 254 }
 255
 256 static inline int
 257 HYPERVISOR_update_va_mapping(
 258         unsigned long va, uint64_t new_val, unsigned long flags)
 259 {
 260         uint32_t hi, lo;
 261
 262         lo = (uint32_t)(new_val & 0xffffffff);
 263         hi = (uint32_t)(new_val >> 32);
 264
 265         return _hypercall4(int, update_va_mapping, va,
 266                            lo, hi, flags);
 267 }
 268
 269 static inline int
 270 HYPERVISOR_event_channel_op(
 271         int cmd, void *arg)
 272 {
 273         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 274
 275 #if CONFIG_XEN_COMPAT <= 0x030002
 276         if (__predict_false(rc == -ENOXENSYS)) {
 277                 struct evtchn_op op;
 278                 op.cmd = cmd;
 279                 memcpy(&op.u, arg, sizeof(op.u));
 280                 rc = _hypercall1(int, event_channel_op_compat, &op);
 281                 memcpy(arg, &op.u, sizeof(op.u));
 282         }
 283 #endif
 284         return (rc);
 285 }
 286
 287 static inline int
 288 HYPERVISOR_xen_version(
 289         int cmd, void *arg)
 290 {
 291         return _hypercall2(int, xen_version, cmd, arg);
 292 }
 293
 294 static inline int
 295 HYPERVISOR_console_io(
 296         int cmd, int count, const char *str)
 297 {
 298         return _hypercall3(int, console_io, cmd, count, str);
 299 }
 300
 301 static inline int
 302 HYPERVISOR_physdev_op(
 303         int cmd, void *arg)
 304 {
 305         int rc = _hypercall2(int, physdev_op, cmd, arg);
 306 #if CONFIG_XEN_COMPAT <= 0x030002
 307         if (__predict_false(rc == -ENOXENSYS)) {
 308                 struct physdev_op op;
 309                 op.cmd = cmd;
 310                 memcpy(&op.u, arg, sizeof(op.u));
 311                 rc = _hypercall1(int, physdev_op_compat, &op);
 312                 memcpy(arg, &op.u, sizeof(op.u));
 313         }
 314 #endif
 315         return (rc);
 316 }
 317
 318 static inline int
 319 HYPERVISOR_grant_table_op(
 320         unsigned int cmd, void *uop, unsigned int count)
 321 {
 322         return _hypercall3(int, grant_table_op, cmd, uop, count);
 323 }
 324
 325 static inline int
 326 HYPERVISOR_update_va_mapping_otherdomain(
 327         unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
 328 {
 329         uint32_t hi, lo;
 330
 331         lo = (uint32_t)(new_val & 0xffffffff);
 332         hi = (uint32_t)(new_val >> 32);
 333
 334         return _hypercall5(int, update_va_mapping_otherdomain, va,
 335                            lo, hi, flags, domid);
 336 }
 337
 338 static inline int
 339 HYPERVISOR_vm_assist(
 340         unsigned int cmd, unsigned int type)
 341 {
 342         return _hypercall2(int, vm_assist, cmd, type);
 343 }
 344
 345 static inline int
 346 HYPERVISOR_vcpu_op(
 347         int cmd, int vcpuid, void *extra_args)
 348 {
 349         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 350 }
 351
 352 static inline int
 353 HYPERVISOR_suspend(
 354         unsigned long srec)
 355 {
 356         struct sched_shutdown sched_shutdown = {
 357                 .reason = SHUTDOWN_suspend
 358         };
 359         int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
 360                            &sched_shutdown, srec);
 361 #if CONFIG_XEN_COMPAT <= 0x030002
 362         if (rc == -ENOXENSYS)
 363                 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
 364                                  SHUTDOWN_suspend, srec);
 365 #endif
 366         return (rc);
 367 }
 368
 369 #if CONFIG_XEN_COMPAT <= 0x030002
 370 static inline int
 371 HYPERVISOR_nmi_op(
 372         unsigned long op, void *arg)
 373 {
 374         return _hypercall2(int, nmi_op, op, arg);
 375 }
 376 #endif
 377
 378 static inline int
 379 HYPERVISOR_callback_op(
 380         int cmd, void *arg)
 381 {
 382         return _hypercall2(int, callback_op, cmd, arg);
 383 }
 384
 385 #ifndef CONFIG_XEN
 386 static inline unsigned long
 387 HYPERVISOR_hvm_op(
 388     int op, void *arg)
 389 {
 390     return _hypercall2(unsigned long, hvm_op, op, arg);
 391 }
 392 #endif
 393
 394 static inline int
 395 HYPERVISOR_xenoprof_op(
 396         int op, void *arg)
 397 {
 398         return _hypercall2(int, xenoprof_op, op, arg);
 399 }
 400
 401 static inline int
 402 HYPERVISOR_kexec_op(
 403         unsigned long op, void *args)
 404 {
 405         return _hypercall2(int, kexec_op, op, args);
 406 }
 407 #endif /* __HYPERCALL_H__ */
 408
 409 /*
 410  * Local variables:
 411  *  c-file-style: "linux"
 412  *  indent-tabs-mode: t
 413  *  c-indent-level: 8
 414  *  c-basic-offset: 8
 415  *  tab-width: 8
 416  * End:
 417  */