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 <contrib/xen/xen.h>
35 #include <contrib/xen/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 if (op >= PAGE_SIZE / 32)
126 return -EINVAL;
127
128 __call = (long)&hypercall_page + (op * 32);
129 __asm__ volatile (
130 "call *%[call]"
131 : "=a" (__res), "=b" (__ign1), "=c" (__ign2),
132 "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)
133 : "1" ((long)(a1)), "2" ((long)(a2)),
134 "3" ((long)(a3)), "4" ((long)(a4)),
135 "5" ((long)(a5)), [call] "a" (__call)
136 : "memory" );
137
138 return __res;
139 }
140
141 static inline int
142 HYPERVISOR_set_trap_table(
143 trap_info_t *table)
144 {
145 return _hypercall1(int, set_trap_table, table);
146 }
147
148 static inline int
149 HYPERVISOR_mmu_update(
150 mmu_update_t *req, int count, int *success_count, domid_t domid)
151 {
152 return _hypercall4(int, mmu_update, req, count, success_count, domid);
153 }
154
155 static inline int
156 HYPERVISOR_mmuext_op(
157 mmuext_op_t *op, int count, int *success_count, domid_t domid)
158 {
159 return _hypercall4(int, mmuext_op, op, count, success_count, domid);
160 }
161
162 static inline int
163 HYPERVISOR_set_gdt(
164 unsigned long *frame_list, int entries)
165 {
166 return _hypercall2(int, set_gdt, frame_list, entries);
167 }
168
169 static inline int
170 HYPERVISOR_stack_switch(
171 unsigned long ss, unsigned long esp)
172 {
173 return _hypercall2(int, stack_switch, ss, esp);
174 }
175
176 static inline int
177 HYPERVISOR_set_callbacks(
178 unsigned long event_selector, unsigned long event_address,
179 unsigned long failsafe_selector, unsigned long failsafe_address)
180 {
181 return _hypercall4(int, set_callbacks,
182 event_selector, event_address,
183 failsafe_selector, failsafe_address);
184 }
185
186 static inline int
187 HYPERVISOR_fpu_taskswitch(
188 int set)
189 {
190 return _hypercall1(int, fpu_taskswitch, set);
191 }
192
193 static inline int
194 HYPERVISOR_sched_op_compat(
195 int cmd, unsigned long arg)
196 {
197 return _hypercall2(int, sched_op_compat, cmd, arg);
198 }
199
200 static inline int
201 HYPERVISOR_sched_op(
202 int cmd, void *arg)
203 {
204 return _hypercall2(int, sched_op, cmd, arg);
205 }
206
207 static inline long
208 HYPERVISOR_set_timer_op(
209 uint64_t timeout)
210 {
211 unsigned long timeout_hi = (unsigned long)(timeout>>32);
212 unsigned long timeout_lo = (unsigned long)timeout;
213 return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
214 }
215
216 static inline int
217 HYPERVISOR_platform_op(
218 struct xen_platform_op *platform_op)
219 {
220 platform_op->interface_version = XENPF_INTERFACE_VERSION;
221 return _hypercall1(int, platform_op, platform_op);
222 }
223
224 static inline int
225 HYPERVISOR_set_debugreg(
226 int reg, unsigned long value)
227 {
228 return _hypercall2(int, set_debugreg, reg, value);
229 }
230
231 static inline unsigned long
232 HYPERVISOR_get_debugreg(
233 int reg)
234 {
235 return _hypercall1(unsigned long, get_debugreg, reg);
236 }
237
238 static inline int
239 HYPERVISOR_update_descriptor(
240 uint64_t ma, uint64_t desc)
241 {
242 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
243 }
244
245 static inline int
246 HYPERVISOR_memory_op(
247 unsigned int cmd, void *arg)
248 {
249 return _hypercall2(int, memory_op, cmd, arg);
250 }
251
252 static inline int
253 HYPERVISOR_multicall(
254 void *call_list, int nr_calls)
255 {
256 return _hypercall2(int, multicall, call_list, nr_calls);
257 }
258
259 static inline int
260 HYPERVISOR_update_va_mapping(
261 unsigned long va, uint64_t new_val, unsigned long flags)
262 {
263 uint32_t hi, lo;
264
265 lo = (uint32_t)(new_val & 0xffffffff);
266 hi = (uint32_t)(new_val >> 32);
267
268 return _hypercall4(int, update_va_mapping, va,
269 lo, hi, flags);
270 }
271
272 static inline int
273 HYPERVISOR_event_channel_op(
274 int cmd, void *arg)
275 {
276 int rc = _hypercall2(int, event_channel_op, cmd, arg);
277
278 #if CONFIG_XEN_COMPAT <= 0x030002
279 if (__predict_false(rc == -ENOXENSYS)) {
280 struct evtchn_op op;
281 op.cmd = cmd;
282 memcpy(&op.u, arg, sizeof(op.u));
283 rc = _hypercall1(int, event_channel_op_compat, &op);
284 memcpy(arg, &op.u, sizeof(op.u));
285 }
286 #endif
287 return (rc);
288 }
289
290 static inline int
291 HYPERVISOR_xen_version(
292 int cmd, void *arg)
293 {
294 return _hypercall2(int, xen_version, cmd, arg);
295 }
296
297 static inline int
298 HYPERVISOR_console_io(
299 int cmd, int count, const char *str)
300 {
301 return _hypercall3(int, console_io, cmd, count, str);
302 }
303
304 static inline int
305 HYPERVISOR_physdev_op(
306 int cmd, void *arg)
307 {
308 int rc = _hypercall2(int, physdev_op, cmd, arg);
309 #if CONFIG_XEN_COMPAT <= 0x030002
310 if (__predict_false(rc == -ENOXENSYS)) {
311 struct physdev_op op;
312 op.cmd = cmd;
313 memcpy(&op.u, arg, sizeof(op.u));
314 rc = _hypercall1(int, physdev_op_compat, &op);
315 memcpy(arg, &op.u, sizeof(op.u));
316 }
317 #endif
318 return (rc);
319 }
320
321 static inline int
322 HYPERVISOR_grant_table_op(
323 unsigned int cmd, void *uop, unsigned int count)
324 {
325 return _hypercall3(int, grant_table_op, cmd, uop, count);
326 }
327
328 static inline int
329 HYPERVISOR_update_va_mapping_otherdomain(
330 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
331 {
332 uint32_t hi, lo;
333
334 lo = (uint32_t)(new_val & 0xffffffff);
335 hi = (uint32_t)(new_val >> 32);
336
337 return _hypercall5(int, update_va_mapping_otherdomain, va,
338 lo, hi, flags, domid);
339 }
340
341 static inline int
342 HYPERVISOR_vm_assist(
343 unsigned int cmd, unsigned int type)
344 {
345 return _hypercall2(int, vm_assist, cmd, type);
346 }
347
348 static inline int
349 HYPERVISOR_vcpu_op(
350 int cmd, int vcpuid, void *extra_args)
351 {
352 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
353 }
354
355 static inline int
356 HYPERVISOR_suspend(
357 unsigned long srec)
358 {
359 struct sched_shutdown sched_shutdown = {
360 .reason = SHUTDOWN_suspend
361 };
362 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
363 &sched_shutdown, srec);
364 #if CONFIG_XEN_COMPAT <= 0x030002
365 if (rc == -ENOXENSYS)
366 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
367 SHUTDOWN_suspend, srec);
368 #endif
369 return (rc);
370 }
371
372 #if CONFIG_XEN_COMPAT <= 0x030002
373 static inline int
374 HYPERVISOR_nmi_op(
375 unsigned long op, void *arg)
376 {
377 return _hypercall2(int, nmi_op, op, arg);
378 }
379 #endif
380
381 static inline int
382 HYPERVISOR_callback_op(
383 int cmd, void *arg)
384 {
385 return _hypercall2(int, callback_op, cmd, arg);
386 }
387
388 #ifndef CONFIG_XEN
389 static inline unsigned long
390 HYPERVISOR_hvm_op(
391 int op, void *arg)
392 {
393 return _hypercall2(unsigned long, hvm_op, op, arg);
394 }
395 #endif
396
397 static inline int
398 HYPERVISOR_xenoprof_op(
399 int op, void *arg)
400 {
401 return _hypercall2(int, xenoprof_op, op, arg);
402 }
403
404 static inline int
405 HYPERVISOR_kexec_op(
406 unsigned long op, void *args)
407 {
408 return _hypercall2(int, kexec_op, op, args);
409 }
410
411 static inline int
412 HYPERVISOR_dm_op(
413 domid_t domid, unsigned int nr_bufs, const void *bufs)
414 {
415 return _hypercall3(int, dm_op, domid, nr_bufs, bufs);
416 }
417 #endif /* __HYPERCALL_H__ */
418
419 /*
420 * Local variables:
421 * c-file-style: "linux"
422 * indent-tabs-mode: t
423 * c-indent-level: 8
424 * c-basic-offset: 8
425 * tab-width: 8
426 * End:
427 */
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