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 #define __STR(x) #x
  38 #define STR(x) __STR(x)
  39 #define ENOXENSYS       38
  40 #define CONFIG_XEN_COMPAT       0x030002
  41
  42
  43 #if defined(XEN)
  44 #define HYPERCALL_STR(name)                                     \
  45         "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
  46 #else
  47 #define HYPERCALL_STR(name)                                     \
  48         "mov hypercall_stubs,%%eax; "                           \
  49         "add $("STR(__HYPERVISOR_##name)" * 32),%%eax; "        \
  50         "call *%%eax"
  51 #endif
  52
  53 #define _hypercall0(type, name)                 \
  54 ({                                              \
  55         long __res;                             \
  56         __asm__ volatile (                          \
  57                 HYPERCALL_STR(name)             \
  58                 : "=a" (__res)                  \
  59                 :                               \
  60                 : "memory" );                   \
  61         (type)__res;                            \
  62 })
  63
  64 #define _hypercall1(type, name, a1)                             \
  65 ({                                                              \
  66         long __res, __ign1;                                     \
  67         __asm__ volatile (                                          \
  68                 HYPERCALL_STR(name)                             \
  69                 : "=a" (__res), "=b" (__ign1)                   \
  70                 : "1" ((long)(a1))                              \
  71                 : "memory" );                                   \
  72         (type)__res;                                            \
  73 })
  74
  75 #define _hypercall2(type, name, a1, a2)                         \
  76 ({                                                              \
  77         long __res, __ign1, __ign2;                             \
  78         __asm__ volatile (                                          \
  79                 HYPERCALL_STR(name)                             \
  80                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2)    \
  81                 : "1" ((long)(a1)), "2" ((long)(a2))            \
  82                 : "memory" );                                   \
  83         (type)__res;                                            \
  84 })
  85
  86 #define _hypercall3(type, name, a1, a2, a3)                     \
  87 ({                                                              \
  88         long __res, __ign1, __ign2, __ign3;                     \
  89         __asm__ volatile (                                          \
  90                 HYPERCALL_STR(name)                             \
  91                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
  92                 "=d" (__ign3)                                   \
  93                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
  94                 "3" ((long)(a3))                                \
  95                 : "memory" );                                   \
  96         (type)__res;                                            \
  97 })
  98
  99 #define _hypercall4(type, name, a1, a2, a3, a4)                 \
 100 ({                                                              \
 101         long __res, __ign1, __ign2, __ign3, __ign4;             \
 102         __asm__ volatile (                                          \
 103                 HYPERCALL_STR(name)                             \
 104                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
 105                 "=d" (__ign3), "=S" (__ign4)                    \
 106                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 107                 "3" ((long)(a3)), "4" ((long)(a4))              \
 108                 : "memory" );                                   \
 109         (type)__res;                                            \
 110 })
 111
 112 #define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
 113 ({                                                              \
 114         long __res, __ign1, __ign2, __ign3, __ign4, __ign5;     \
 115         __asm__ volatile (                                          \
 116                 HYPERCALL_STR(name)                             \
 117                 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
 118                 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)     \
 119                 : "1" ((long)(a1)), "2" ((long)(a2)),           \
 120                 "3" ((long)(a3)), "4" ((long)(a4)),             \
 121                 "5" ((long)(a5))                                \
 122                 : "memory" );                                   \
 123         (type)__res;                                            \
 124 })
 125
 126 static inline int
 127 HYPERVISOR_set_trap_table(
 128         trap_info_t *table)
 129 {
 130         return _hypercall1(int, set_trap_table, table);
 131 }
 132
 133 static inline int
 134 HYPERVISOR_mmu_update(
 135         mmu_update_t *req, int count, int *success_count, domid_t domid)
 136 {
 137         return _hypercall4(int, mmu_update, req, count, success_count, domid);
 138 }
 139
 140 static inline int
 141 HYPERVISOR_mmuext_op(
 142         mmuext_op_t *op, int count, int *success_count, domid_t domid)
 143 {
 144         return _hypercall4(int, mmuext_op, op, count, success_count, domid);
 145 }
 146
 147 static inline int
 148 HYPERVISOR_set_gdt(
 149         unsigned long *frame_list, int entries)
 150 {
 151         return _hypercall2(int, set_gdt, frame_list, entries);
 152 }
 153
 154 static inline int
 155 HYPERVISOR_stack_switch(
 156         unsigned long ss, unsigned long esp)
 157 {
 158         return _hypercall2(int, stack_switch, ss, esp);
 159 }
 160
 161 static inline int
 162 HYPERVISOR_set_callbacks(
 163         unsigned long event_selector, unsigned long event_address,
 164         unsigned long failsafe_selector, unsigned long failsafe_address)
 165 {
 166         return _hypercall4(int, set_callbacks,
 167                            event_selector, event_address,
 168                            failsafe_selector, failsafe_address);
 169 }
 170
 171 static inline int
 172 HYPERVISOR_fpu_taskswitch(
 173         int set)
 174 {
 175         return _hypercall1(int, fpu_taskswitch, set);
 176 }
 177
 178 static inline int
 179 HYPERVISOR_sched_op_compat(
 180         int cmd, unsigned long arg)
 181 {
 182         return _hypercall2(int, sched_op_compat, cmd, arg);
 183 }
 184
 185 static inline int
 186 HYPERVISOR_sched_op(
 187         int cmd, void *arg)
 188 {
 189         return _hypercall2(int, sched_op, cmd, arg);
 190 }
 191
 192 static inline long
 193 HYPERVISOR_set_timer_op(
 194         uint64_t timeout)
 195 {
 196         unsigned long timeout_hi = (unsigned long)(timeout>>32);
 197         unsigned long timeout_lo = (unsigned long)timeout;
 198         return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 199 }
 200 #if 0
 201 static inline int
 202 HYPERVISOR_platform_op(
 203         struct xen_platform_op *platform_op)
 204 {
 205         platform_op->interface_version = XENPF_INTERFACE_VERSION;
 206         return _hypercall1(int, platform_op, platform_op);
 207 }
 208 #endif
 209 static inline int
 210 HYPERVISOR_set_debugreg(
 211         int reg, unsigned long value)
 212 {
 213         return _hypercall2(int, set_debugreg, reg, value);
 214 }
 215
 216 static inline unsigned long
 217 HYPERVISOR_get_debugreg(
 218         int reg)
 219 {
 220         return _hypercall1(unsigned long, get_debugreg, reg);
 221 }
 222
 223 static inline int
 224 HYPERVISOR_update_descriptor(
 225         uint64_t ma, uint64_t desc)
 226 {
 227         return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
 228 }
 229
 230 static inline int
 231 HYPERVISOR_memory_op(
 232         unsigned int cmd, void *arg)
 233 {
 234         return _hypercall2(int, memory_op, cmd, arg);
 235 }
 236
 237 #if defined(XEN)
 238 int HYPERVISOR_multicall(multicall_entry_t *, int);
 239 static inline int
 240 _HYPERVISOR_multicall(
 241 #else /* XENHVM */
 242 static inline int
 243 HYPERVISOR_multicall(
 244 #endif
 245         void *call_list, int nr_calls)
 246 {
 247         return _hypercall2(int, multicall, call_list, nr_calls);
 248 }
 249
 250 static inline int
 251 HYPERVISOR_update_va_mapping(
 252         unsigned long va, uint64_t new_val, unsigned long flags)
 253 {
 254         uint32_t hi, lo;
 255
 256         lo = (uint32_t)(new_val & 0xffffffff);
 257         hi = (uint32_t)(new_val >> 32);
 258
 259         return _hypercall4(int, update_va_mapping, va,
 260                            lo, hi, flags);
 261 }
 262
 263 static inline int
 264 HYPERVISOR_event_channel_op(
 265         int cmd, void *arg)
 266 {
 267         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 268
 269 #if CONFIG_XEN_COMPAT <= 0x030002
 270         if (__predict_false(rc == -ENOXENSYS)) {
 271                 struct evtchn_op op;
 272                 op.cmd = cmd;
 273                 memcpy(&op.u, arg, sizeof(op.u));
 274                 rc = _hypercall1(int, event_channel_op_compat, &op);
 275                 memcpy(arg, &op.u, sizeof(op.u));
 276         }
 277 #endif
 278         return (rc);
 279 }
 280
 281 static inline int
 282 HYPERVISOR_xen_version(
 283         int cmd, void *arg)
 284 {
 285         return _hypercall2(int, xen_version, cmd, arg);
 286 }
 287
 288 static inline int
 289 HYPERVISOR_console_io(
 290         int cmd, int count, char *str)
 291 {
 292         return _hypercall3(int, console_io, cmd, count, str);
 293 }
 294
 295 static inline int
 296 HYPERVISOR_physdev_op(
 297         int cmd, void *arg)
 298 {
 299         int rc = _hypercall2(int, physdev_op, cmd, arg);
 300 #if CONFIG_XEN_COMPAT <= 0x030002
 301         if (__predict_false(rc == -ENOXENSYS)) {
 302                 struct physdev_op op;
 303                 op.cmd = cmd;
 304                 memcpy(&op.u, arg, sizeof(op.u));
 305                 rc = _hypercall1(int, physdev_op_compat, &op);
 306                 memcpy(arg, &op.u, sizeof(op.u));
 307         }
 308 #endif
 309         return (rc);
 310 }
 311
 312 static inline int
 313 HYPERVISOR_grant_table_op(
 314         unsigned int cmd, void *uop, unsigned int count)
 315 {
 316         return _hypercall3(int, grant_table_op, cmd, uop, count);
 317 }
 318
 319 static inline int
 320 HYPERVISOR_update_va_mapping_otherdomain(
 321         unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
 322 {
 323         uint32_t hi, lo;
 324
 325         lo = (uint32_t)(new_val & 0xffffffff);
 326         hi = (uint32_t)(new_val >> 32);
 327
 328         return _hypercall5(int, update_va_mapping_otherdomain, va,
 329                            lo, hi, flags, domid);
 330 }
 331
 332 static inline int
 333 HYPERVISOR_vm_assist(
 334         unsigned int cmd, unsigned int type)
 335 {
 336         return _hypercall2(int, vm_assist, cmd, type);
 337 }
 338
 339 static inline int
 340 HYPERVISOR_vcpu_op(
 341         int cmd, int vcpuid, void *extra_args)
 342 {
 343         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 344 }
 345
 346 static inline int
 347 HYPERVISOR_suspend(
 348         unsigned long srec)
 349 {
 350         struct sched_shutdown sched_shutdown = {
 351                 .reason = SHUTDOWN_suspend
 352         };
 353         int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
 354                            &sched_shutdown, srec);
 355 #if CONFIG_XEN_COMPAT <= 0x030002
 356         if (rc == -ENOXENSYS)
 357                 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
 358                                  SHUTDOWN_suspend, srec);
 359 #endif
 360         return (rc);
 361 }
 362
 363 #if CONFIG_XEN_COMPAT <= 0x030002
 364 static inline int
 365 HYPERVISOR_nmi_op(
 366         unsigned long op, void *arg)
 367 {
 368         return _hypercall2(int, nmi_op, op, arg);
 369 }
 370 #endif
 371
 372 static inline int
 373 HYPERVISOR_callback_op(
 374         int cmd, void *arg)
 375 {
 376         return _hypercall2(int, callback_op, cmd, arg);
 377 }
 378
 379 #ifndef CONFIG_XEN
 380 static inline unsigned long
 381 HYPERVISOR_hvm_op(
 382     int op, void *arg)
 383 {
 384     return _hypercall2(unsigned long, hvm_op, op, arg);
 385 }
 386 #endif
 387
 388 static inline int
 389 HYPERVISOR_xenoprof_op(
 390         int op, void *arg)
 391 {
 392         return _hypercall2(int, xenoprof_op, op, arg);
 393 }
 394
 395 static inline int
 396 HYPERVISOR_kexec_op(
 397         unsigned long op, void *args)
 398 {
 399         return _hypercall2(int, kexec_op, op, args);
 400 }
 401 #endif /* __HYPERCALL_H__ */
 402
 403 /*
 404  * Local variables:
 405  *  c-file-style: "linux"
 406  *  indent-tabs-mode: t
 407  *  c-indent-level: 8
 408  *  c-basic-offset: 8
 409  *  tab-width: 8
 410  * End:
 411  */