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 static inline int
 238 HYPERVISOR_multicall(
 239         void *call_list, int nr_calls)
 240 {
 241         return _hypercall2(int, multicall, call_list, nr_calls);
 242 }
 243
 244 static inline int
 245 HYPERVISOR_update_va_mapping(
 246         unsigned long va, uint64_t new_val, unsigned long flags)
 247 {
 248         uint32_t hi, lo;
 249
 250         lo = (uint32_t)(new_val & 0xffffffff);
 251         hi = (uint32_t)(new_val >> 32);
 252
 253         return _hypercall4(int, update_va_mapping, va,
 254                            lo, hi, flags);
 255 }
 256
 257 static inline int
 258 HYPERVISOR_event_channel_op(
 259         int cmd, void *arg)
 260 {
 261         int rc = _hypercall2(int, event_channel_op, cmd, arg);
 262
 263 #if CONFIG_XEN_COMPAT <= 0x030002
 264         if (__predict_false(rc == -ENOXENSYS)) {
 265                 struct evtchn_op op;
 266                 op.cmd = cmd;
 267                 memcpy(&op.u, arg, sizeof(op.u));
 268                 rc = _hypercall1(int, event_channel_op_compat, &op);
 269                 memcpy(arg, &op.u, sizeof(op.u));
 270         }
 271 #endif
 272         return (rc);
 273 }
 274
 275 static inline int
 276 HYPERVISOR_xen_version(
 277         int cmd, void *arg)
 278 {
 279         return _hypercall2(int, xen_version, cmd, arg);
 280 }
 281
 282 static inline int
 283 HYPERVISOR_console_io(
 284         int cmd, int count, char *str)
 285 {
 286         return _hypercall3(int, console_io, cmd, count, str);
 287 }
 288
 289 static inline int
 290 HYPERVISOR_physdev_op(
 291         int cmd, void *arg)
 292 {
 293         int rc = _hypercall2(int, physdev_op, cmd, arg);
 294 #if CONFIG_XEN_COMPAT <= 0x030002
 295         if (__predict_false(rc == -ENOXENSYS)) {
 296                 struct physdev_op op;
 297                 op.cmd = cmd;
 298                 memcpy(&op.u, arg, sizeof(op.u));
 299                 rc = _hypercall1(int, physdev_op_compat, &op);
 300                 memcpy(arg, &op.u, sizeof(op.u));
 301         }
 302 #endif
 303         return (rc);
 304 }
 305
 306 static inline int
 307 HYPERVISOR_grant_table_op(
 308         unsigned int cmd, void *uop, unsigned int count)
 309 {
 310         return _hypercall3(int, grant_table_op, cmd, uop, count);
 311 }
 312
 313 static inline int
 314 HYPERVISOR_update_va_mapping_otherdomain(
 315         unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
 316 {
 317         uint32_t hi, lo;
 318
 319         lo = (uint32_t)(new_val & 0xffffffff);
 320         hi = (uint32_t)(new_val >> 32);
 321
 322         return _hypercall5(int, update_va_mapping_otherdomain, va,
 323                            lo, hi, flags, domid);
 324 }
 325
 326 static inline int
 327 HYPERVISOR_vm_assist(
 328         unsigned int cmd, unsigned int type)
 329 {
 330         return _hypercall2(int, vm_assist, cmd, type);
 331 }
 332
 333 static inline int
 334 HYPERVISOR_vcpu_op(
 335         int cmd, int vcpuid, void *extra_args)
 336 {
 337         return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
 338 }
 339
 340 static inline int
 341 HYPERVISOR_suspend(
 342         unsigned long srec)
 343 {
 344         struct sched_shutdown sched_shutdown = {
 345                 .reason = SHUTDOWN_suspend
 346         };
 347         int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
 348                            &sched_shutdown, srec);
 349 #if CONFIG_XEN_COMPAT <= 0x030002
 350         if (rc == -ENOXENSYS)
 351                 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
 352                                  SHUTDOWN_suspend, srec);
 353 #endif
 354         return (rc);
 355 }
 356
 357 #if CONFIG_XEN_COMPAT <= 0x030002
 358 static inline int
 359 HYPERVISOR_nmi_op(
 360         unsigned long op, void *arg)
 361 {
 362         return _hypercall2(int, nmi_op, op, arg);
 363 }
 364 #endif
 365
 366 static inline int
 367 HYPERVISOR_callback_op(
 368         int cmd, void *arg)
 369 {
 370         return _hypercall2(int, callback_op, cmd, arg);
 371 }
 372
 373 #ifndef CONFIG_XEN
 374 static inline unsigned long
 375 HYPERVISOR_hvm_op(
 376     int op, void *arg)
 377 {
 378     return _hypercall2(unsigned long, hvm_op, op, arg);
 379 }
 380 #endif
 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 static inline int
 390 HYPERVISOR_kexec_op(
 391         unsigned long op, void *args)
 392 {
 393         return _hypercall2(int, kexec_op, op, args);
 394 }
 395 #endif /* __HYPERCALL_H__ */
 396
 397 /*
 398  * Local variables:
 399  *  c-file-style: "linux"
 400  *  indent-tabs-mode: t
 401  *  c-indent-level: 8
 402  *  c-basic-offset: 8
 403  *  tab-width: 8
 404  * End:
 405  */