1 /******************************************************************************
2 * hypercall.h
3 *
4 * FreeBSD-specific hypervisor handling.
5 *
6 * Copyright (c) 2002-2004, K A Fraser
7 *
8 * 64-bit updates:
9 * Benjamin Liu <[email protected]>
10 * Jun Nakajima <[email protected]>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License version 2
14 * as published by the Free Software Foundation; or, when distributed
15 * separately from the Linux kernel or incorporated into other
16 * software packages, subject to the following license:
17 *
18 * Permission is hereby granted, free of charge, to any person obtaining a copy
19 * of this source file (the "Software"), to deal in the Software without
20 * restriction, including without limitation the rights to use, copy, modify,
21 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
22 * and to permit persons to whom the Software is furnished to do so, subject to
23 * the following conditions:
24 *
25 * The above copyright notice and this permission notice shall be included in
26 * all copies or substantial portions of the Software.
27 *
28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
29 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
30 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
31 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
32 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
33 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
34 * IN THE SOFTWARE.
35 *
36 * $FreeBSD$
37 */
38
39 #ifndef __MACHINE_XEN_HYPERCALL_H__
40 #define __MACHINE_XEN_HYPERCALL_H__
41
42 #include <sys/systm.h>
43
44 #ifndef __XEN_HYPERVISOR_H__
45 # error "please don't include this file directly"
46 #endif
47
48 extern char *hypercall_page;
49
50 #define __STR(x) #x
51 #define STR(x) __STR(x)
52 #define ENOXENSYS 38
53 #define CONFIG_XEN_COMPAT 0x030002
54 #define __must_check
55
56 #define HYPERCALL_STR(name) \
57 "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
58
59 #define _hypercall0(type, name) \
60 ({ \
61 type __res; \
62 __asm__ volatile ( \
63 HYPERCALL_STR(name) \
64 : "=a" (__res) \
65 : \
66 : "memory" ); \
67 __res; \
68 })
69
70 #define _hypercall1(type, name, a1) \
71 ({ \
72 type __res; \
73 long __ign1; \
74 __asm__ volatile ( \
75 HYPERCALL_STR(name) \
76 : "=a" (__res), "=D" (__ign1) \
77 : "1" ((long)(a1)) \
78 : "memory" ); \
79 __res; \
80 })
81
82 #define _hypercall2(type, name, a1, a2) \
83 ({ \
84 type __res; \
85 long __ign1, __ign2; \
86 __asm__ volatile ( \
87 HYPERCALL_STR(name) \
88 : "=a" (__res), "=D" (__ign1), "=S" (__ign2) \
89 : "1" ((long)(a1)), "2" ((long)(a2)) \
90 : "memory" ); \
91 __res; \
92 })
93
94 #define _hypercall3(type, name, a1, a2, a3) \
95 ({ \
96 type __res; \
97 long __ign1, __ign2, __ign3; \
98 __asm__ volatile ( \
99 HYPERCALL_STR(name) \
100 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
101 "=d" (__ign3) \
102 : "1" ((long)(a1)), "2" ((long)(a2)), \
103 "3" ((long)(a3)) \
104 : "memory" ); \
105 __res; \
106 })
107
108 #define _hypercall4(type, name, a1, a2, a3, a4) \
109 ({ \
110 type __res; \
111 long __ign1, __ign2, __ign3; \
112 register long __arg4 __asm__("r10") = (long)(a4); \
113 __asm__ volatile ( \
114 HYPERCALL_STR(name) \
115 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
116 "=d" (__ign3), "+r" (__arg4) \
117 : "1" ((long)(a1)), "2" ((long)(a2)), \
118 "3" ((long)(a3)) \
119 : "memory" ); \
120 __res; \
121 })
122
123 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \
124 ({ \
125 type __res; \
126 long __ign1, __ign2, __ign3; \
127 register long __arg4 __asm__("r10") = (long)(a4); \
128 register long __arg5 __asm__("r8") = (long)(a5); \
129 __asm__ volatile ( \
130 HYPERCALL_STR(name) \
131 : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
132 "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) \
133 : "1" ((long)(a1)), "2" ((long)(a2)), \
134 "3" ((long)(a3)) \
135 : "memory" ); \
136 __res; \
137 })
138
139 static inline int
privcmd_hypercall(long op,long a1,long a2,long a3,long a4,long a5)140 privcmd_hypercall(long op, long a1, long a2, long a3, long a4, long a5)
141 {
142 int __res;
143 long __ign1, __ign2, __ign3;
144 register long __arg4 __asm__("r10") = (long)(a4);
145 register long __arg5 __asm__("r8") = (long)(a5);
146 long __call = (long)&hypercall_page + (op * 32);
147
148 __asm__ volatile (
149 "call *%[call]"
150 : "=a" (__res), "=D" (__ign1), "=S" (__ign2),
151 "=d" (__ign3), "+r" (__arg4), "+r" (__arg5)
152 : "1" ((long)(a1)), "2" ((long)(a2)),
153 "3" ((long)(a3)), [call] "a" (__call)
154 : "memory" );
155
156 return (__res);
157 }
158
159 static inline int __must_check
HYPERVISOR_set_trap_table(const trap_info_t * table)160 HYPERVISOR_set_trap_table(
161 const trap_info_t *table)
162 {
163 return _hypercall1(int, set_trap_table, table);
164 }
165
166 static inline int __must_check
HYPERVISOR_mmu_update(mmu_update_t * req,unsigned int count,unsigned int * success_count,domid_t domid)167 HYPERVISOR_mmu_update(
168 mmu_update_t *req, unsigned int count, unsigned int *success_count,
169 domid_t domid)
170 {
171 return _hypercall4(int, mmu_update, req, count, success_count, domid);
172 }
173
174 static inline int __must_check
HYPERVISOR_mmuext_op(struct mmuext_op * op,unsigned int count,unsigned int * success_count,domid_t domid)175 HYPERVISOR_mmuext_op(
176 struct mmuext_op *op, unsigned int count, unsigned int *success_count,
177 domid_t domid)
178 {
179 return _hypercall4(int, mmuext_op, op, count, success_count, domid);
180 }
181
182 static inline int __must_check
HYPERVISOR_set_gdt(unsigned long * frame_list,unsigned int entries)183 HYPERVISOR_set_gdt(
184 unsigned long *frame_list, unsigned int entries)
185 {
186 return _hypercall2(int, set_gdt, frame_list, entries);
187 }
188
189 static inline int __must_check
HYPERVISOR_stack_switch(unsigned long ss,unsigned long esp)190 HYPERVISOR_stack_switch(
191 unsigned long ss, unsigned long esp)
192 {
193 return _hypercall2(int, stack_switch, ss, esp);
194 }
195
196 static inline int __must_check
HYPERVISOR_set_callbacks(unsigned long event_address,unsigned long failsafe_address,unsigned long syscall_address)197 HYPERVISOR_set_callbacks(
198 unsigned long event_address, unsigned long failsafe_address,
199 unsigned long syscall_address)
200 {
201 return _hypercall3(int, set_callbacks,
202 event_address, failsafe_address, syscall_address);
203 }
204
205 static inline int
HYPERVISOR_fpu_taskswitch(int set)206 HYPERVISOR_fpu_taskswitch(
207 int set)
208 {
209 return _hypercall1(int, fpu_taskswitch, set);
210 }
211
212 static inline int __must_check
HYPERVISOR_sched_op_compat(int cmd,unsigned long arg)213 HYPERVISOR_sched_op_compat(
214 int cmd, unsigned long arg)
215 {
216 return _hypercall2(int, sched_op_compat, cmd, arg);
217 }
218
219 static inline int __must_check
HYPERVISOR_sched_op(int cmd,void * arg)220 HYPERVISOR_sched_op(
221 int cmd, void *arg)
222 {
223 return _hypercall2(int, sched_op, cmd, arg);
224 }
225
226 static inline long __must_check
HYPERVISOR_set_timer_op(uint64_t timeout)227 HYPERVISOR_set_timer_op(
228 uint64_t timeout)
229 {
230 return _hypercall1(long, set_timer_op, timeout);
231 }
232
233 static inline int __must_check
HYPERVISOR_platform_op(struct xen_platform_op * platform_op)234 HYPERVISOR_platform_op(
235 struct xen_platform_op *platform_op)
236 {
237 platform_op->interface_version = XENPF_INTERFACE_VERSION;
238 return _hypercall1(int, platform_op, platform_op);
239 }
240
241 static inline int __must_check
HYPERVISOR_set_debugreg(unsigned int reg,unsigned long value)242 HYPERVISOR_set_debugreg(
243 unsigned int reg, unsigned long value)
244 {
245 return _hypercall2(int, set_debugreg, reg, value);
246 }
247
248 static inline unsigned long __must_check
HYPERVISOR_get_debugreg(unsigned int reg)249 HYPERVISOR_get_debugreg(
250 unsigned int reg)
251 {
252 return _hypercall1(unsigned long, get_debugreg, reg);
253 }
254
255 static inline int __must_check
HYPERVISOR_update_descriptor(unsigned long ma,unsigned long word)256 HYPERVISOR_update_descriptor(
257 unsigned long ma, unsigned long word)
258 {
259 return _hypercall2(int, update_descriptor, ma, word);
260 }
261
262 static inline int __must_check
HYPERVISOR_memory_op(unsigned int cmd,void * arg)263 HYPERVISOR_memory_op(
264 unsigned int cmd, void *arg)
265 {
266 return _hypercall2(int, memory_op, cmd, arg);
267 }
268
269 static inline int __must_check
HYPERVISOR_multicall(multicall_entry_t * call_list,unsigned int nr_calls)270 HYPERVISOR_multicall(
271 multicall_entry_t *call_list, unsigned int nr_calls)
272 {
273 return _hypercall2(int, multicall, call_list, nr_calls);
274 }
275
276 static inline int __must_check
HYPERVISOR_update_va_mapping(unsigned long va,uint64_t new_val,unsigned long flags)277 HYPERVISOR_update_va_mapping(
278 unsigned long va, uint64_t new_val, unsigned long flags)
279 {
280 return _hypercall3(int, update_va_mapping, va, new_val, flags);
281 }
282
283 static inline int __must_check
HYPERVISOR_event_channel_op(int cmd,void * arg)284 HYPERVISOR_event_channel_op(
285 int cmd, void *arg)
286 {
287 int rc = _hypercall2(int, event_channel_op, cmd, arg);
288
289 #if CONFIG_XEN_COMPAT <= 0x030002
290 if (__predict_false(rc == -ENOXENSYS)) {
291 struct evtchn_op op;
292 op.cmd = cmd;
293 memcpy(&op.u, arg, sizeof(op.u));
294 rc = _hypercall1(int, event_channel_op_compat, &op);
295 memcpy(arg, &op.u, sizeof(op.u));
296 }
297 #endif
298
299 return rc;
300 }
301
302 static inline int __must_check
HYPERVISOR_xen_version(int cmd,void * arg)303 HYPERVISOR_xen_version(
304 int cmd, void *arg)
305 {
306 return _hypercall2(int, xen_version, cmd, arg);
307 }
308
309 static inline int __must_check
HYPERVISOR_console_io(int cmd,unsigned int count,const char * str)310 HYPERVISOR_console_io(
311 int cmd, unsigned int count, const char *str)
312 {
313 return _hypercall3(int, console_io, cmd, count, str);
314 }
315
316 static inline int __must_check
HYPERVISOR_physdev_op(int cmd,void * arg)317 HYPERVISOR_physdev_op(
318 int cmd, void *arg)
319 {
320 int rc = _hypercall2(int, physdev_op, cmd, arg);
321
322 #if CONFIG_XEN_COMPAT <= 0x030002
323 if (__predict_false(rc == -ENOXENSYS)) {
324 struct physdev_op op;
325 op.cmd = cmd;
326 memcpy(&op.u, arg, sizeof(op.u));
327 rc = _hypercall1(int, physdev_op_compat, &op);
328 memcpy(arg, &op.u, sizeof(op.u));
329 }
330 #endif
331
332 return rc;
333 }
334
335 static inline int __must_check
HYPERVISOR_grant_table_op(unsigned int cmd,void * uop,unsigned int count)336 HYPERVISOR_grant_table_op(
337 unsigned int cmd, void *uop, unsigned int count)
338 {
339 return _hypercall3(int, grant_table_op, cmd, uop, count);
340 }
341
342 static inline int __must_check
HYPERVISOR_update_va_mapping_otherdomain(unsigned long va,uint64_t new_val,unsigned long flags,domid_t domid)343 HYPERVISOR_update_va_mapping_otherdomain(
344 unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
345 {
346 return _hypercall4(int, update_va_mapping_otherdomain, va,
347 new_val, flags, domid);
348 }
349
350 static inline int __must_check
HYPERVISOR_vm_assist(unsigned int cmd,unsigned int type)351 HYPERVISOR_vm_assist(
352 unsigned int cmd, unsigned int type)
353 {
354 return _hypercall2(int, vm_assist, cmd, type);
355 }
356
357 static inline int __must_check
HYPERVISOR_vcpu_op(int cmd,unsigned int vcpuid,void * extra_args)358 HYPERVISOR_vcpu_op(
359 int cmd, unsigned int vcpuid, void *extra_args)
360 {
361 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
362 }
363
364 static inline int __must_check
HYPERVISOR_set_segment_base(int reg,unsigned long value)365 HYPERVISOR_set_segment_base(
366 int reg, unsigned long value)
367 {
368 return _hypercall2(int, set_segment_base, reg, value);
369 }
370
371 static inline int __must_check
HYPERVISOR_suspend(unsigned long srec)372 HYPERVISOR_suspend(
373 unsigned long srec)
374 {
375 struct sched_shutdown sched_shutdown = {
376 .reason = SHUTDOWN_suspend
377 };
378
379 int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
380 &sched_shutdown, srec);
381
382 #if CONFIG_XEN_COMPAT <= 0x030002
383 if (rc == -ENOXENSYS)
384 rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
385 SHUTDOWN_suspend, srec);
386 #endif
387
388 return rc;
389 }
390
391 #if CONFIG_XEN_COMPAT <= 0x030002
392 static inline int
HYPERVISOR_nmi_op(unsigned long op,void * arg)393 HYPERVISOR_nmi_op(
394 unsigned long op, void *arg)
395 {
396 return _hypercall2(int, nmi_op, op, arg);
397 }
398 #endif
399
400 #ifndef CONFIG_XEN
401 static inline unsigned long __must_check
HYPERVISOR_hvm_op(int op,void * arg)402 HYPERVISOR_hvm_op(
403 int op, void *arg)
404 {
405 return _hypercall2(unsigned long, hvm_op, op, arg);
406 }
407 #endif
408
409 static inline int __must_check
HYPERVISOR_callback_op(int cmd,const void * arg)410 HYPERVISOR_callback_op(
411 int cmd, const void *arg)
412 {
413 return _hypercall2(int, callback_op, cmd, arg);
414 }
415
416 static inline int __must_check
HYPERVISOR_xenoprof_op(int op,void * arg)417 HYPERVISOR_xenoprof_op(
418 int op, void *arg)
419 {
420 return _hypercall2(int, xenoprof_op, op, arg);
421 }
422
423 static inline int __must_check
HYPERVISOR_kexec_op(unsigned long op,void * args)424 HYPERVISOR_kexec_op(
425 unsigned long op, void *args)
426 {
427 return _hypercall2(int, kexec_op, op, args);
428 }
429
430 static inline int __must_check
HYPERVISOR_dm_op(domid_t domid,unsigned int nr_bufs,const void * bufs)431 HYPERVISOR_dm_op(
432 domid_t domid, unsigned int nr_bufs, const void *bufs)
433 {
434 return _hypercall3(int, dm_op, domid, nr_bufs, bufs);
435 }
436
437 #undef __must_check
438
439 #endif /* __MACHINE_XEN_HYPERCALL_H__ */
440