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/errno.h> 37#include <linux/string.h> 38 39#include <xen/interface/xen.h> 40#include <xen/interface/sched.h> 41#include <xen/interface/physdev.h> 42 43extern struct { char _entry[32]; } hypercall_page[]; 44 45#define _hypercall0(type, name) \ 46({ \ 47 long __res; \ 48 asm volatile ( \ 49 "call %[call]" \ 50 : "=a" (__res) \ 51 : [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 52 : "memory" ); \ 53 (type)__res; \ 54}) 55 56#define _hypercall1(type, name, a1) \ 57({ \ 58 long __res, __ign1; \ 59 asm volatile ( \ 60 "call %[call]" \ 61 : "=a" (__res), "=b" (__ign1) \ 62 : "1" ((long)(a1)), \ 63 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 64 : "memory" ); \ 65 (type)__res; \ 66}) 67 68#define _hypercall2(type, name, a1, a2) \ 69({ \ 70 long __res, __ign1, __ign2; \ 71 asm volatile ( \ 72 "call %[call]" \ 73 : "=a" (__res), "=b" (__ign1), "=c" (__ign2) \ 74 : "1" ((long)(a1)), "2" ((long)(a2)), \ 75 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 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 "call %[call]" \ 85 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 86 "=d" (__ign3) \ 87 : "1" ((long)(a1)), "2" ((long)(a2)), \ 88 "3" ((long)(a3)), \ 89 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 90 : "memory" ); \ 91 (type)__res; \ 92}) 93 94#define _hypercall4(type, name, a1, a2, a3, a4) \ 95({ \ 96 long __res, __ign1, __ign2, __ign3, __ign4; \ 97 asm volatile ( \ 98 "call %[call]" \ 99 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 100 "=d" (__ign3), "=S" (__ign4) \ 101 : "1" ((long)(a1)), "2" ((long)(a2)), \ 102 "3" ((long)(a3)), "4" ((long)(a4)), \ 103 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 104 : "memory" ); \ 105 (type)__res; \ 106}) 107 108#define _hypercall5(type, name, a1, a2, a3, a4, a5) \ 109({ \ 110 long __res, __ign1, __ign2, __ign3, __ign4, __ign5; \ 111 asm volatile ( \ 112 "call %[call]" \ 113 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \ 114 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \ 115 : "1" ((long)(a1)), "2" ((long)(a2)), \ 116 "3" ((long)(a3)), "4" ((long)(a4)), \ 117 "5" ((long)(a5)), \ 118 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \ 119 : "memory" ); \ 120 (type)__res; \ 121}) 122 123static inline int 124HYPERVISOR_set_trap_table(struct trap_info *table) 125{ 126 return _hypercall1(int, set_trap_table, table); 127} 128 129static inline int 130HYPERVISOR_mmu_update(struct mmu_update *req, int count, 131 int *success_count, domid_t domid) 132{ 133 return _hypercall4(int, mmu_update, req, count, success_count, domid); 134} 135 136static inline int 137HYPERVISOR_mmuext_op(struct mmuext_op *op, int count, 138 int *success_count, domid_t domid) 139{ 140 return _hypercall4(int, mmuext_op, op, count, success_count, domid); 141} 142 143static inline int 144HYPERVISOR_set_gdt(unsigned long *frame_list, int entries) 145{ 146 return _hypercall2(int, set_gdt, frame_list, entries); 147} 148 149static inline int 150HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp) 151{ 152 return _hypercall2(int, stack_switch, ss, esp); 153} 154 155static inline int 156HYPERVISOR_set_callbacks(unsigned long event_selector, 157 unsigned long event_address, 158 unsigned long failsafe_selector, 159 unsigned long failsafe_address) 160{ 161 return _hypercall4(int, set_callbacks, 162 event_selector, event_address, 163 failsafe_selector, failsafe_address); 164} 165 166static inline int 167HYPERVISOR_fpu_taskswitch(int set) 168{ 169 return _hypercall1(int, fpu_taskswitch, set); 170} 171 172static inline int 173HYPERVISOR_sched_op(int cmd, unsigned long arg) 174{ 175 return _hypercall2(int, sched_op, cmd, arg); 176} 177 178static inline long 179HYPERVISOR_set_timer_op(u64 timeout) 180{ 181 unsigned long timeout_hi = (unsigned long)(timeout>>32); 182 unsigned long timeout_lo = (unsigned long)timeout; 183 return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi); 184} 185 186static inline int 187HYPERVISOR_set_debugreg(int reg, unsigned long value) 188{ 189 return _hypercall2(int, set_debugreg, reg, value); 190} 191 192static inline unsigned long 193HYPERVISOR_get_debugreg(int reg) 194{ 195 return _hypercall1(unsigned long, get_debugreg, reg); 196} 197 198static inline int 199HYPERVISOR_update_descriptor(u64 ma, u64 desc) 200{ 201 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32); 202} 203 204static inline int 205HYPERVISOR_memory_op(unsigned int cmd, void *arg) 206{ 207 return _hypercall2(int, memory_op, cmd, arg); 208} 209 210static inline int 211HYPERVISOR_multicall(void *call_list, int nr_calls) 212{ 213 return _hypercall2(int, multicall, call_list, nr_calls); 214} 215 216static inline int 217HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val, 218 unsigned long flags) 219{ 220 unsigned long pte_hi = 0; 221#ifdef CONFIG_X86_PAE 222 pte_hi = new_val.pte_high; 223#endif 224 return _hypercall4(int, update_va_mapping, va, 225 new_val.pte_low, pte_hi, flags); 226} 227 228static inline int 229HYPERVISOR_event_channel_op(int cmd, void *arg) 230{ 231 int rc = _hypercall2(int, event_channel_op, cmd, arg); 232 if (unlikely(rc == -ENOSYS)) { 233 struct evtchn_op op; 234 op.cmd = cmd; 235 memcpy(&op.u, arg, sizeof(op.u)); 236 rc = _hypercall1(int, event_channel_op_compat, &op); 237 memcpy(arg, &op.u, sizeof(op.u)); 238 } 239 return rc; 240} 241 242static inline int 243HYPERVISOR_xen_version(int cmd, void *arg) 244{ 245 return _hypercall2(int, xen_version, cmd, arg); 246} 247 248static inline int 249HYPERVISOR_console_io(int cmd, int count, char *str) 250{ 251 return _hypercall3(int, console_io, cmd, count, str); 252} 253 254static inline int 255HYPERVISOR_physdev_op(int cmd, void *arg) 256{ 257 int rc = _hypercall2(int, physdev_op, cmd, arg); 258 if (unlikely(rc == -ENOSYS)) { 259 struct physdev_op op; 260 op.cmd = cmd; 261 memcpy(&op.u, arg, sizeof(op.u)); 262 rc = _hypercall1(int, physdev_op_compat, &op); 263 memcpy(arg, &op.u, sizeof(op.u)); 264 } 265 return rc; 266} 267 268static inline int 269HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count) 270{ 271 return _hypercall3(int, grant_table_op, cmd, uop, count); 272} 273 274static inline int 275HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val, 276 unsigned long flags, domid_t domid) 277{ 278 unsigned long pte_hi = 0; 279#ifdef CONFIG_X86_PAE 280 pte_hi = new_val.pte_high; 281#endif 282 return _hypercall5(int, update_va_mapping_otherdomain, va, 283 new_val.pte_low, pte_hi, flags, domid); 284} 285 286static inline int 287HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type) 288{ 289 return _hypercall2(int, vm_assist, cmd, type); 290} 291 292static inline int 293HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args) 294{ 295 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); 296} 297 298static inline int 299HYPERVISOR_suspend(unsigned long srec) 300{ 301 return _hypercall3(int, sched_op, SCHEDOP_shutdown, 302 SHUTDOWN_suspend, srec); 303} 304 305static inline int 306HYPERVISOR_nmi_op(unsigned long op, unsigned long arg) 307{ 308 return _hypercall2(int, nmi_op, op, arg); 309} 310 311static inline void 312MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va, 313 pte_t new_val, unsigned long flags) 314{ 315 mcl->op = __HYPERVISOR_update_va_mapping; 316 mcl->args[0] = va; 317#ifdef CONFIG_X86_PAE 318 mcl->args[1] = new_val.pte_low; 319 mcl->args[2] = new_val.pte_high; 320#else 321 mcl->args[1] = new_val.pte_low; 322 mcl->args[2] = 0; 323#endif 324 mcl->args[3] = flags; 325} 326 327static inline void 328MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd, 329 void *uop, unsigned int count) 330{ 331 mcl->op = __HYPERVISOR_grant_table_op; 332 mcl->args[0] = cmd; 333 mcl->args[1] = (unsigned long)uop; 334 mcl->args[2] = count; 335} 336 337static inline void 338MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va, 339 pte_t new_val, unsigned long flags, 340 domid_t domid) 341{ 342 mcl->op = __HYPERVISOR_update_va_mapping_otherdomain; 343 mcl->args[0] = va; 344#ifdef CONFIG_X86_PAE 345 mcl->args[1] = new_val.pte_low; 346 mcl->args[2] = new_val.pte_high; 347#else 348 mcl->args[1] = new_val.pte_low; 349 mcl->args[2] = 0; 350#endif 351 mcl->args[3] = flags; 352 mcl->args[4] = domid; 353} 354 355static inline void 356MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr, 357 struct desc_struct desc) 358{ 359 mcl->op = __HYPERVISOR_update_descriptor; 360 mcl->args[0] = maddr; 361 mcl->args[1] = maddr >> 32; 362 mcl->args[2] = desc.a; 363 mcl->args[3] = desc.b; 364} 365 366static inline void 367MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg) 368{ 369 mcl->op = __HYPERVISOR_memory_op; 370 mcl->args[0] = cmd; 371 mcl->args[1] = (unsigned long)arg; 372} 373 374static inline void 375MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req, 376 int count, int *success_count, domid_t domid) 377{ 378 mcl->op = __HYPERVISOR_mmu_update; 379 mcl->args[0] = (unsigned long)req; 380 mcl->args[1] = count; 381 mcl->args[2] = (unsigned long)success_count; 382 mcl->args[3] = domid; 383} 384 385static inline void 386MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count, 387 int *success_count, domid_t domid) 388{ 389 mcl->op = __HYPERVISOR_mmuext_op; 390 mcl->args[0] = (unsigned long)op; 391 mcl->args[1] = count; 392 mcl->args[2] = (unsigned long)success_count; 393 mcl->args[3] = domid; 394} 395 396static inline void 397MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries) 398{ 399 mcl->op = __HYPERVISOR_set_gdt; 400 mcl->args[0] = (unsigned long)frames; 401 mcl->args[1] = entries; 402} 403 404static inline void 405MULTI_stack_switch(struct multicall_entry *mcl, 406 unsigned long ss, unsigned long esp) 407{ 408 mcl->op = __HYPERVISOR_stack_switch; 409 mcl->args[0] = ss; 410 mcl->args[1] = esp; 411} 412 413#endif /* __HYPERCALL_H__ */ 414