arch/ia64/include/asm/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 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 _ASM_IA64_XEN_HYPERCALL_H
  34 #define _ASM_IA64_XEN_HYPERCALL_H
  35
  36 #include <xen/interface/xen.h>
  37 #include <xen/interface/physdev.h>
  38 #include <xen/interface/sched.h>
  39 #include <asm/xen/xcom_hcall.h>
  40 struct xencomm_handle;
  41 extern unsigned long __hypercall(unsigned long a1, unsigned long a2,
  42                                  unsigned long a3, unsigned long a4,
  43                                  unsigned long a5, unsigned long cmd);
  44
  45 /*
  46  * Assembler stubs for hyper-calls.
  47  */
  48
  49 #define _hypercall0(type, name)                                 \
  50 ({                                                              \
  51         long __res;                                             \
  52         __res = __hypercall(0, 0, 0, 0, 0, __HYPERVISOR_##name);\
  53         (type)__res;                                            \
  54 })
  55
  56 #define _hypercall1(type, name, a1)                             \
  57 ({                                                              \
  58         long __res;                                             \
  59         __res = __hypercall((unsigned long)a1,                  \
  60                              0, 0, 0, 0, __HYPERVISOR_##name);  \
  61         (type)__res;                                            \
  62 })
  63
  64 #define _hypercall2(type, name, a1, a2)                         \
  65 ({                                                              \
  66         long __res;                                             \
  67         __res = __hypercall((unsigned long)a1,                  \
  68                             (unsigned long)a2,                  \
  69                             0, 0, 0, __HYPERVISOR_##name);      \
  70         (type)__res;                                            \
  71 })
  72
  73 #define _hypercall3(type, name, a1, a2, a3)                     \
  74 ({                                                              \
  75         long __res;                                             \
  76         __res = __hypercall((unsigned long)a1,                  \
  77                             (unsigned long)a2,                  \
  78                             (unsigned long)a3,                  \
  79                             0, 0, __HYPERVISOR_##name);         \
  80         (type)__res;                                            \
  81 })
  82
  83 #define _hypercall4(type, name, a1, a2, a3, a4)                 \
  84 ({                                                              \
  85         long __res;                                             \
  86         __res = __hypercall((unsigned long)a1,                  \
  87                             (unsigned long)a2,                  \
  88                             (unsigned long)a3,                  \
  89                             (unsigned long)a4,                  \
  90                             0, __HYPERVISOR_##name);            \
  91         (type)__res;                                            \
  92 })
  93
  94 #define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
  95 ({                                                              \
  96         long __res;                                             \
  97         __res = __hypercall((unsigned long)a1,                  \
  98                             (unsigned long)a2,                  \
  99                             (unsigned long)a3,                  \
 100                             (unsigned long)a4,                  \
 101                             (unsigned long)a5,                  \
 102                             __HYPERVISOR_##name);               \
 103         (type)__res;                                            \
 104 })
 105
 106
 107 static inline int
 108 xencomm_arch_hypercall_sched_op(int cmd, struct xencomm_handle *arg)
 109 {
 110         return _hypercall2(int, sched_op, cmd, arg);
 111 }
 112
 113 static inline long
 114 HYPERVISOR_set_timer_op(u64 timeout)
 115 {
 116         unsigned long timeout_hi = (unsigned long)(timeout >> 32);
 117         unsigned long timeout_lo = (unsigned long)timeout;
 118         return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 119 }
 120
 121 static inline int
 122 xencomm_arch_hypercall_multicall(struct xencomm_handle *call_list,
 123                                  int nr_calls)
 124 {
 125         return _hypercall2(int, multicall, call_list, nr_calls);
 126 }
 127
 128 static inline int
 129 xencomm_arch_hypercall_memory_op(unsigned int cmd, struct xencomm_handle *arg)
 130 {
 131         return _hypercall2(int, memory_op, cmd, arg);
 132 }
 133
 134 static inline int
 135 xencomm_arch_hypercall_event_channel_op(int cmd, struct xencomm_handle *arg)
 136 {
 137         return _hypercall2(int, event_channel_op, cmd, arg);
 138 }
 139
 140 static inline int
 141 xencomm_arch_hypercall_xen_version(int cmd, struct xencomm_handle *arg)
 142 {
 143         return _hypercall2(int, xen_version, cmd, arg);
 144 }
 145
 146 static inline int
 147 xencomm_arch_hypercall_console_io(int cmd, int count,
 148                                   struct xencomm_handle *str)
 149 {
 150         return _hypercall3(int, console_io, cmd, count, str);
 151 }
 152
 153 static inline int
 154 xencomm_arch_hypercall_physdev_op(int cmd, struct xencomm_handle *arg)
 155 {
 156         return _hypercall2(int, physdev_op, cmd, arg);
 157 }
 158
 159 static inline int
 160 xencomm_arch_hypercall_grant_table_op(unsigned int cmd,
 161                                       struct xencomm_handle *uop,
 162                                       unsigned int count)
 163 {
 164         return _hypercall3(int, grant_table_op, cmd, uop, count);
 165 }
 166
 167 int HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count);
 168
 169 extern int xencomm_arch_hypercall_suspend(struct xencomm_handle *arg);
 170
 171 static inline int
 172 xencomm_arch_hypercall_callback_op(int cmd, struct xencomm_handle *arg)
 173 {
 174         return _hypercall2(int, callback_op, cmd, arg);
 175 }
 176
 177 static inline long
 178 xencomm_arch_hypercall_vcpu_op(int cmd, int cpu, void *arg)
 179 {
 180         return _hypercall3(long, vcpu_op, cmd, cpu, arg);
 181 }
 182
 183 static inline int
 184 HYPERVISOR_physdev_op(int cmd, void *arg)
 185 {
 186         switch (cmd) {
 187         case PHYSDEVOP_eoi:
 188                 return _hypercall1(int, ia64_fast_eoi,
 189                                    ((struct physdev_eoi *)arg)->irq);
 190         default:
 191                 return xencomm_hypercall_physdev_op(cmd, arg);
 192         }
 193 }
 194
 195 static inline long
 196 xencomm_arch_hypercall_opt_feature(struct xencomm_handle *arg)
 197 {
 198         return _hypercall1(long, opt_feature, arg);
 199 }
 200
 201 /* for balloon driver */
 202 #define HYPERVISOR_update_va_mapping(va, new_val, flags) (0)
 203
 204 /* Use xencomm to do hypercalls.  */
 205 #define HYPERVISOR_sched_op xencomm_hypercall_sched_op
 206 #define HYPERVISOR_event_channel_op xencomm_hypercall_event_channel_op
 207 #define HYPERVISOR_callback_op xencomm_hypercall_callback_op
 208 #define HYPERVISOR_multicall xencomm_hypercall_multicall
 209 #define HYPERVISOR_xen_version xencomm_hypercall_xen_version
 210 #define HYPERVISOR_console_io xencomm_hypercall_console_io
 211 #define HYPERVISOR_memory_op xencomm_hypercall_memory_op
 212 #define HYPERVISOR_suspend xencomm_hypercall_suspend
 213 #define HYPERVISOR_vcpu_op xencomm_hypercall_vcpu_op
 214 #define HYPERVISOR_opt_feature xencomm_hypercall_opt_feature
 215
 216 /* to compile gnttab_copy_grant_page() in drivers/xen/core/gnttab.c */
 217 #define HYPERVISOR_mmu_update(req, count, success_count, domid) ({ BUG(); 0; })
 218
 219 static inline int
 220 HYPERVISOR_shutdown(
 221         unsigned int reason)
 222 {
 223         struct sched_shutdown sched_shutdown = {
 224                 .reason = reason
 225         };
 226
 227         int rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
 228
 229         return rc;
 230 }
 231
 232 /* for netfront.c, netback.c */
 233 #define MULTI_UVMFLAGS_INDEX 0 /* XXX any value */
 234
 235 static inline void
 236 MULTI_update_va_mapping(
 237         struct multicall_entry *mcl, unsigned long va,
 238         pte_t new_val, unsigned long flags)
 239 {
 240         mcl->op = __HYPERVISOR_update_va_mapping;
 241         mcl->result = 0;
 242 }
 243
 244 static inline void
 245 MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
 246         void *uop, unsigned int count)
 247 {
 248         mcl->op = __HYPERVISOR_grant_table_op;
 249         mcl->args[0] = cmd;
 250         mcl->args[1] = (unsigned long)uop;
 251         mcl->args[2] = count;
 252 }
 253
 254 static inline void
 255 MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
 256                  int count, int *success_count, domid_t domid)
 257 {
 258         mcl->op = __HYPERVISOR_mmu_update;
 259         mcl->args[0] = (unsigned long)req;
 260         mcl->args[1] = count;
 261         mcl->args[2] = (unsigned long)success_count;
 262         mcl->args[3] = domid;
 263 }
 264
 265 #endif /* _ASM_IA64_XEN_HYPERCALL_H */