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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 | ||
43 | extern 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 | ||
123 | static inline int | |
124 | HYPERVISOR_set_trap_table(struct trap_info *table) | |
125 | { | |
126 | return _hypercall1(int, set_trap_table, table); | |
127 | } | |
128 | ||
129 | static inline int | |
130 | HYPERVISOR_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 | ||
136 | static inline int | |
137 | HYPERVISOR_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 | ||
143 | static inline int | |
144 | HYPERVISOR_set_gdt(unsigned long *frame_list, int entries) | |
145 | { | |
146 | return _hypercall2(int, set_gdt, frame_list, entries); | |
147 | } | |
148 | ||
149 | static inline int | |
150 | HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp) | |
151 | { | |
152 | return _hypercall2(int, stack_switch, ss, esp); | |
153 | } | |
154 | ||
155 | static inline int | |
156 | HYPERVISOR_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 | ||
aa380c82 JF |
166 | static inline int |
167 | HYPERVISOR_callback_op(int cmd, void *arg) | |
168 | { | |
169 | return _hypercall2(int, callback_op, cmd, arg); | |
170 | } | |
171 | ||
a42089dd JF |
172 | static inline int |
173 | HYPERVISOR_fpu_taskswitch(int set) | |
174 | { | |
175 | return _hypercall1(int, fpu_taskswitch, set); | |
176 | } | |
177 | ||
178 | static inline int | |
179 | HYPERVISOR_sched_op(int cmd, unsigned long arg) | |
180 | { | |
181 | return _hypercall2(int, sched_op, cmd, arg); | |
182 | } | |
183 | ||
184 | static inline long | |
185 | HYPERVISOR_set_timer_op(u64 timeout) | |
186 | { | |
187 | unsigned long timeout_hi = (unsigned long)(timeout>>32); | |
188 | unsigned long timeout_lo = (unsigned long)timeout; | |
189 | return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi); | |
190 | } | |
191 | ||
192 | static inline int | |
193 | HYPERVISOR_set_debugreg(int reg, unsigned long value) | |
194 | { | |
195 | return _hypercall2(int, set_debugreg, reg, value); | |
196 | } | |
197 | ||
198 | static inline unsigned long | |
199 | HYPERVISOR_get_debugreg(int reg) | |
200 | { | |
201 | return _hypercall1(unsigned long, get_debugreg, reg); | |
202 | } | |
203 | ||
204 | static inline int | |
205 | HYPERVISOR_update_descriptor(u64 ma, u64 desc) | |
206 | { | |
207 | return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32); | |
208 | } | |
209 | ||
210 | static inline int | |
211 | HYPERVISOR_memory_op(unsigned int cmd, void *arg) | |
212 | { | |
213 | return _hypercall2(int, memory_op, cmd, arg); | |
214 | } | |
215 | ||
216 | static inline int | |
217 | HYPERVISOR_multicall(void *call_list, int nr_calls) | |
218 | { | |
219 | return _hypercall2(int, multicall, call_list, nr_calls); | |
220 | } | |
221 | ||
222 | static inline int | |
223 | HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val, | |
224 | unsigned long flags) | |
225 | { | |
226 | unsigned long pte_hi = 0; | |
227 | #ifdef CONFIG_X86_PAE | |
228 | pte_hi = new_val.pte_high; | |
229 | #endif | |
230 | return _hypercall4(int, update_va_mapping, va, | |
231 | new_val.pte_low, pte_hi, flags); | |
232 | } | |
233 | ||
234 | static inline int | |
235 | HYPERVISOR_event_channel_op(int cmd, void *arg) | |
236 | { | |
237 | int rc = _hypercall2(int, event_channel_op, cmd, arg); | |
238 | if (unlikely(rc == -ENOSYS)) { | |
239 | struct evtchn_op op; | |
240 | op.cmd = cmd; | |
241 | memcpy(&op.u, arg, sizeof(op.u)); | |
242 | rc = _hypercall1(int, event_channel_op_compat, &op); | |
243 | memcpy(arg, &op.u, sizeof(op.u)); | |
244 | } | |
245 | return rc; | |
246 | } | |
247 | ||
248 | static inline int | |
249 | HYPERVISOR_xen_version(int cmd, void *arg) | |
250 | { | |
251 | return _hypercall2(int, xen_version, cmd, arg); | |
252 | } | |
253 | ||
254 | static inline int | |
255 | HYPERVISOR_console_io(int cmd, int count, char *str) | |
256 | { | |
257 | return _hypercall3(int, console_io, cmd, count, str); | |
258 | } | |
259 | ||
260 | static inline int | |
261 | HYPERVISOR_physdev_op(int cmd, void *arg) | |
262 | { | |
263 | int rc = _hypercall2(int, physdev_op, cmd, arg); | |
264 | if (unlikely(rc == -ENOSYS)) { | |
265 | struct physdev_op op; | |
266 | op.cmd = cmd; | |
267 | memcpy(&op.u, arg, sizeof(op.u)); | |
268 | rc = _hypercall1(int, physdev_op_compat, &op); | |
269 | memcpy(arg, &op.u, sizeof(op.u)); | |
270 | } | |
271 | return rc; | |
272 | } | |
273 | ||
274 | static inline int | |
275 | HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count) | |
276 | { | |
277 | return _hypercall3(int, grant_table_op, cmd, uop, count); | |
278 | } | |
279 | ||
280 | static inline int | |
281 | HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val, | |
282 | unsigned long flags, domid_t domid) | |
283 | { | |
284 | unsigned long pte_hi = 0; | |
285 | #ifdef CONFIG_X86_PAE | |
286 | pte_hi = new_val.pte_high; | |
287 | #endif | |
288 | return _hypercall5(int, update_va_mapping_otherdomain, va, | |
289 | new_val.pte_low, pte_hi, flags, domid); | |
290 | } | |
291 | ||
292 | static inline int | |
293 | HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type) | |
294 | { | |
295 | return _hypercall2(int, vm_assist, cmd, type); | |
296 | } | |
297 | ||
298 | static inline int | |
299 | HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args) | |
300 | { | |
301 | return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args); | |
302 | } | |
303 | ||
304 | static inline int | |
305 | HYPERVISOR_suspend(unsigned long srec) | |
306 | { | |
307 | return _hypercall3(int, sched_op, SCHEDOP_shutdown, | |
308 | SHUTDOWN_suspend, srec); | |
309 | } | |
310 | ||
311 | static inline int | |
312 | HYPERVISOR_nmi_op(unsigned long op, unsigned long arg) | |
313 | { | |
314 | return _hypercall2(int, nmi_op, op, arg); | |
315 | } | |
316 | ||
317 | static inline void | |
318 | MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va, | |
319 | pte_t new_val, unsigned long flags) | |
320 | { | |
321 | mcl->op = __HYPERVISOR_update_va_mapping; | |
322 | mcl->args[0] = va; | |
323 | #ifdef CONFIG_X86_PAE | |
324 | mcl->args[1] = new_val.pte_low; | |
325 | mcl->args[2] = new_val.pte_high; | |
326 | #else | |
327 | mcl->args[1] = new_val.pte_low; | |
328 | mcl->args[2] = 0; | |
329 | #endif | |
330 | mcl->args[3] = flags; | |
331 | } | |
332 | ||
333 | static inline void | |
334 | MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd, | |
335 | void *uop, unsigned int count) | |
336 | { | |
337 | mcl->op = __HYPERVISOR_grant_table_op; | |
338 | mcl->args[0] = cmd; | |
339 | mcl->args[1] = (unsigned long)uop; | |
340 | mcl->args[2] = count; | |
341 | } | |
342 | ||
343 | static inline void | |
344 | MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va, | |
345 | pte_t new_val, unsigned long flags, | |
346 | domid_t domid) | |
347 | { | |
348 | mcl->op = __HYPERVISOR_update_va_mapping_otherdomain; | |
349 | mcl->args[0] = va; | |
350 | #ifdef CONFIG_X86_PAE | |
351 | mcl->args[1] = new_val.pte_low; | |
352 | mcl->args[2] = new_val.pte_high; | |
353 | #else | |
354 | mcl->args[1] = new_val.pte_low; | |
355 | mcl->args[2] = 0; | |
356 | #endif | |
357 | mcl->args[3] = flags; | |
358 | mcl->args[4] = domid; | |
359 | } | |
360 | ||
361 | static inline void | |
362 | MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr, | |
363 | struct desc_struct desc) | |
364 | { | |
365 | mcl->op = __HYPERVISOR_update_descriptor; | |
366 | mcl->args[0] = maddr; | |
367 | mcl->args[1] = maddr >> 32; | |
368 | mcl->args[2] = desc.a; | |
369 | mcl->args[3] = desc.b; | |
370 | } | |
371 | ||
372 | static inline void | |
373 | MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg) | |
374 | { | |
375 | mcl->op = __HYPERVISOR_memory_op; | |
376 | mcl->args[0] = cmd; | |
377 | mcl->args[1] = (unsigned long)arg; | |
378 | } | |
379 | ||
380 | static inline void | |
381 | MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req, | |
382 | int count, int *success_count, domid_t domid) | |
383 | { | |
384 | mcl->op = __HYPERVISOR_mmu_update; | |
385 | mcl->args[0] = (unsigned long)req; | |
386 | mcl->args[1] = count; | |
387 | mcl->args[2] = (unsigned long)success_count; | |
388 | mcl->args[3] = domid; | |
389 | } | |
390 | ||
391 | static inline void | |
392 | MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count, | |
393 | int *success_count, domid_t domid) | |
394 | { | |
395 | mcl->op = __HYPERVISOR_mmuext_op; | |
396 | mcl->args[0] = (unsigned long)op; | |
397 | mcl->args[1] = count; | |
398 | mcl->args[2] = (unsigned long)success_count; | |
399 | mcl->args[3] = domid; | |
400 | } | |
5ead97c8 JF |
401 | |
402 | static inline void | |
403 | MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries) | |
404 | { | |
405 | mcl->op = __HYPERVISOR_set_gdt; | |
406 | mcl->args[0] = (unsigned long)frames; | |
407 | mcl->args[1] = entries; | |
408 | } | |
409 | ||
410 | static inline void | |
411 | MULTI_stack_switch(struct multicall_entry *mcl, | |
412 | unsigned long ss, unsigned long esp) | |
413 | { | |
414 | mcl->op = __HYPERVISOR_stack_switch; | |
415 | mcl->args[0] = ss; | |
416 | mcl->args[1] = esp; | |
417 | } | |
418 | ||
a42089dd | 419 | #endif /* __HYPERCALL_H__ */ |