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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
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
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166static inline int
167HYPERVISOR_callback_op(int cmd, void *arg)
168{
169 return _hypercall2(int, callback_op, cmd, arg);
170}
171
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172static inline int
173HYPERVISOR_fpu_taskswitch(int set)
174{
175 return _hypercall1(int, fpu_taskswitch, set);
176}
177
178static inline int
349c709f 179HYPERVISOR_sched_op(int cmd, void *arg)
a42089dd 180{
349c709f 181 return _hypercall2(int, sched_op_new, cmd, arg);
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182}
183
184static inline long
185HYPERVISOR_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
192static inline int
193HYPERVISOR_set_debugreg(int reg, unsigned long value)
194{
195 return _hypercall2(int, set_debugreg, reg, value);
196}
197
198static inline unsigned long
199HYPERVISOR_get_debugreg(int reg)
200{
201 return _hypercall1(unsigned long, get_debugreg, reg);
202}
203
204static inline int
205HYPERVISOR_update_descriptor(u64 ma, u64 desc)
206{
207 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
208}
209
210static inline int
211HYPERVISOR_memory_op(unsigned int cmd, void *arg)
212{
213 return _hypercall2(int, memory_op, cmd, arg);
214}
215
216static inline int
217HYPERVISOR_multicall(void *call_list, int nr_calls)
218{
219 return _hypercall2(int, multicall, call_list, nr_calls);
220}
221
222static inline int
223HYPERVISOR_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
234static inline int
235HYPERVISOR_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
248static inline int
249HYPERVISOR_xen_version(int cmd, void *arg)
250{
251 return _hypercall2(int, xen_version, cmd, arg);
252}
253
254static inline int
255HYPERVISOR_console_io(int cmd, int count, char *str)
256{
257 return _hypercall3(int, console_io, cmd, count, str);
258}
259
260static inline int
261HYPERVISOR_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
274static inline int
275HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
276{
277 return _hypercall3(int, grant_table_op, cmd, uop, count);
278}
279
280static inline int
281HYPERVISOR_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
292static inline int
293HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
294{
295 return _hypercall2(int, vm_assist, cmd, type);
296}
297
298static inline int
299HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
300{
301 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
302}
303
304static inline int
305HYPERVISOR_suspend(unsigned long srec)
306{
307 return _hypercall3(int, sched_op, SCHEDOP_shutdown,
308 SHUTDOWN_suspend, srec);
309}
310
311static inline int
312HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
313{
314 return _hypercall2(int, nmi_op, op, arg);
315}
316
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317static inline void
318MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
319{
320 mcl->op = __HYPERVISOR_fpu_taskswitch;
321 mcl->args[0] = set;
322}
323
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324static inline void
325MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
326 pte_t new_val, unsigned long flags)
327{
328 mcl->op = __HYPERVISOR_update_va_mapping;
329 mcl->args[0] = va;
330#ifdef CONFIG_X86_PAE
331 mcl->args[1] = new_val.pte_low;
332 mcl->args[2] = new_val.pte_high;
333#else
334 mcl->args[1] = new_val.pte_low;
335 mcl->args[2] = 0;
336#endif
337 mcl->args[3] = flags;
338}
339
340static inline void
341MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
342 void *uop, unsigned int count)
343{
344 mcl->op = __HYPERVISOR_grant_table_op;
345 mcl->args[0] = cmd;
346 mcl->args[1] = (unsigned long)uop;
347 mcl->args[2] = count;
348}
349
350static inline void
351MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
352 pte_t new_val, unsigned long flags,
353 domid_t domid)
354{
355 mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
356 mcl->args[0] = va;
357#ifdef CONFIG_X86_PAE
358 mcl->args[1] = new_val.pte_low;
359 mcl->args[2] = new_val.pte_high;
360#else
361 mcl->args[1] = new_val.pte_low;
362 mcl->args[2] = 0;
363#endif
364 mcl->args[3] = flags;
365 mcl->args[4] = domid;
366}
367
368static inline void
369MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
370 struct desc_struct desc)
371{
372 mcl->op = __HYPERVISOR_update_descriptor;
373 mcl->args[0] = maddr;
374 mcl->args[1] = maddr >> 32;
375 mcl->args[2] = desc.a;
376 mcl->args[3] = desc.b;
377}
378
379static inline void
380MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
381{
382 mcl->op = __HYPERVISOR_memory_op;
383 mcl->args[0] = cmd;
384 mcl->args[1] = (unsigned long)arg;
385}
386
387static inline void
388MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
389 int count, int *success_count, domid_t domid)
390{
391 mcl->op = __HYPERVISOR_mmu_update;
392 mcl->args[0] = (unsigned long)req;
393 mcl->args[1] = count;
394 mcl->args[2] = (unsigned long)success_count;
395 mcl->args[3] = domid;
396}
397
398static inline void
399MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
400 int *success_count, domid_t domid)
401{
402 mcl->op = __HYPERVISOR_mmuext_op;
403 mcl->args[0] = (unsigned long)op;
404 mcl->args[1] = count;
405 mcl->args[2] = (unsigned long)success_count;
406 mcl->args[3] = domid;
407}
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408
409static inline void
410MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries)
411{
412 mcl->op = __HYPERVISOR_set_gdt;
413 mcl->args[0] = (unsigned long)frames;
414 mcl->args[1] = entries;
415}
416
417static inline void
418MULTI_stack_switch(struct multicall_entry *mcl,
419 unsigned long ss, unsigned long esp)
420{
421 mcl->op = __HYPERVISOR_stack_switch;
422 mcl->args[0] = ss;
423 mcl->args[1] = esp;
424}
425
a42089dd 426#endif /* __HYPERCALL_H__ */