hypercall.h revision 215818 
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 <xen/interface/xen.h>
35#include <xen/interface/sched.h>
36
37#define __STR(x) #x
38#define STR(x) __STR(x)
39#define	ENOXENSYS	38
40#define CONFIG_XEN_COMPAT	0x030002
41
42
43#if defined(XEN)
44#define HYPERCALL_STR(name)                                     \
45        "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
46#else
47#define HYPERCALL_STR(name)                                     \
48        "mov hypercall_stubs,%%eax; "                           \
49        "add $("STR(__HYPERVISOR_##name)" * 32),%%eax; "        \
50        "call *%%eax"
51#endif
52
53#define _hypercall0(type, name)                 \
54({                                              \
55        long __res;                             \
56        __asm__ volatile (                          \
57                HYPERCALL_STR(name)             \
58                : "=a" (__res)                  \
59                :                               \
60                : "memory" );                   \
61        (type)__res;                            \
62})
63
64#define _hypercall1(type, name, a1)                             \
65({                                                              \
66        long __res, __ign1;                                     \
67        __asm__ volatile (                                          \
68                HYPERCALL_STR(name)                             \
69                : "=a" (__res), "=b" (__ign1)                   \
70                : "1" ((long)(a1))                              \
71                : "memory" );                                   \
72        (type)__res;                                            \
73})
74
75#define _hypercall2(type, name, a1, a2)                         \
76({                                                              \
77        long __res, __ign1, __ign2;                             \
78        __asm__ volatile (                                          \
79                HYPERCALL_STR(name)                             \
80                : "=a" (__res), "=b" (__ign1), "=c" (__ign2)    \
81                : "1" ((long)(a1)), "2" ((long)(a2))            \
82                : "memory" );                                   \
83        (type)__res;                                            \
84})
85
86#define _hypercall3(type, name, a1, a2, a3)                     \
87({                                                              \
88        long __res, __ign1, __ign2, __ign3;                     \
89        __asm__ volatile (                                          \
90                HYPERCALL_STR(name)                             \
91                : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
92                "=d" (__ign3)                                   \
93                : "1" ((long)(a1)), "2" ((long)(a2)),           \
94                "3" ((long)(a3))                                \
95                : "memory" );                                   \
96        (type)__res;                                            \
97})
98
99#define _hypercall4(type, name, a1, a2, a3, a4)                 \
100({                                                              \
101        long __res, __ign1, __ign2, __ign3, __ign4;             \
102        __asm__ volatile (                                          \
103                HYPERCALL_STR(name)                             \
104                : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
105                "=d" (__ign3), "=S" (__ign4)                    \
106                : "1" ((long)(a1)), "2" ((long)(a2)),           \
107                "3" ((long)(a3)), "4" ((long)(a4))              \
108                : "memory" );                                   \
109        (type)__res;                                            \
110})
111
112#define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
113({                                                              \
114        long __res, __ign1, __ign2, __ign3, __ign4, __ign5;     \
115        __asm__ volatile (                                          \
116                HYPERCALL_STR(name)                             \
117                : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
118                "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)     \
119                : "1" ((long)(a1)), "2" ((long)(a2)),           \
120                "3" ((long)(a3)), "4" ((long)(a4)),             \
121                "5" ((long)(a5))                                \
122                : "memory" );                                   \
123        (type)__res;                                            \
124})
125
126static inline int
127HYPERVISOR_set_trap_table(
128	trap_info_t *table)
129{
130	return _hypercall1(int, set_trap_table, table);
131}
132
133static inline int
134HYPERVISOR_mmu_update(
135	mmu_update_t *req, int count, int *success_count, domid_t domid)
136{
137	return _hypercall4(int, mmu_update, req, count, success_count, domid);
138}
139
140static inline int
141HYPERVISOR_mmuext_op(
142	mmuext_op_t *op, int count, int *success_count, domid_t domid)
143{
144	return _hypercall4(int, mmuext_op, op, count, success_count, domid);
145}
146
147static inline int
148HYPERVISOR_set_gdt(
149	unsigned long *frame_list, int entries)
150{
151	return _hypercall2(int, set_gdt, frame_list, entries);
152}
153
154static inline int
155HYPERVISOR_stack_switch(
156	unsigned long ss, unsigned long esp)
157{
158	return _hypercall2(int, stack_switch, ss, esp);
159}
160
161static inline int
162HYPERVISOR_set_callbacks(
163	unsigned long event_selector, unsigned long event_address,
164	unsigned long failsafe_selector, unsigned long failsafe_address)
165{
166	return _hypercall4(int, set_callbacks,
167			   event_selector, event_address,
168			   failsafe_selector, failsafe_address);
169}
170
171static inline int
172HYPERVISOR_fpu_taskswitch(
173	int set)
174{
175	return _hypercall1(int, fpu_taskswitch, set);
176}
177
178static inline int
179HYPERVISOR_sched_op_compat(
180	int cmd, unsigned long arg)
181{
182	return _hypercall2(int, sched_op_compat, cmd, arg);
183}
184
185static inline int
186HYPERVISOR_sched_op(
187	int cmd, void *arg)
188{
189	return _hypercall2(int, sched_op, cmd, arg);
190}
191
192static inline long
193HYPERVISOR_set_timer_op(
194	uint64_t timeout)
195{
196	unsigned long timeout_hi = (unsigned long)(timeout>>32);
197	unsigned long timeout_lo = (unsigned long)timeout;
198	return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
199}
200#if 0
201static inline int
202HYPERVISOR_platform_op(
203        struct xen_platform_op *platform_op)
204{
205        platform_op->interface_version = XENPF_INTERFACE_VERSION;
206        return _hypercall1(int, platform_op, platform_op);
207}
208#endif
209static inline int
210HYPERVISOR_set_debugreg(
211	int reg, unsigned long value)
212{
213	return _hypercall2(int, set_debugreg, reg, value);
214}
215
216static inline unsigned long
217HYPERVISOR_get_debugreg(
218	int reg)
219{
220	return _hypercall1(unsigned long, get_debugreg, reg);
221}
222
223static inline int
224HYPERVISOR_update_descriptor(
225	uint64_t ma, uint64_t desc)
226{
227	return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
228}
229
230static inline int
231HYPERVISOR_memory_op(
232	unsigned int cmd, void *arg)
233{
234	return _hypercall2(int, memory_op, cmd, arg);
235}
236
237int HYPERVISOR_multicall(multicall_entry_t *, int);
238static inline int
239_HYPERVISOR_multicall(
240	void *call_list, int nr_calls)
241{
242	return _hypercall2(int, multicall, call_list, nr_calls);
243}
244
245static inline int
246HYPERVISOR_update_va_mapping(
247	unsigned long va, uint64_t new_val, unsigned long flags)
248{
249	uint32_t hi, lo;
250
251	lo = (uint32_t)(new_val & 0xffffffff);
252	hi = (uint32_t)(new_val >> 32);
253
254	return _hypercall4(int, update_va_mapping, va,
255			   lo, hi, flags);
256}
257
258static inline int
259HYPERVISOR_event_channel_op(
260	int cmd, void *arg)
261{
262	int rc = _hypercall2(int, event_channel_op, cmd, arg);
263
264#if CONFIG_XEN_COMPAT <= 0x030002
265	if (__predict_false(rc == -ENOXENSYS)) {
266		struct evtchn_op op;
267		op.cmd = cmd;
268		memcpy(&op.u, arg, sizeof(op.u));
269		rc = _hypercall1(int, event_channel_op_compat, &op);
270		memcpy(arg, &op.u, sizeof(op.u));
271	}
272#endif
273	return (rc);
274}
275
276static inline int
277HYPERVISOR_xen_version(
278	int cmd, void *arg)
279{
280	return _hypercall2(int, xen_version, cmd, arg);
281}
282
283static inline int
284HYPERVISOR_console_io(
285	int cmd, int count, char *str)
286{
287	return _hypercall3(int, console_io, cmd, count, str);
288}
289
290static inline int
291HYPERVISOR_physdev_op(
292	int cmd, void *arg)
293{
294	int rc = _hypercall2(int, physdev_op, cmd, arg);
295#if CONFIG_XEN_COMPAT <= 0x030002
296	if (__predict_false(rc == -ENOXENSYS)) {
297		struct physdev_op op;
298		op.cmd = cmd;
299		memcpy(&op.u, arg, sizeof(op.u));
300		rc = _hypercall1(int, physdev_op_compat, &op);
301		memcpy(arg, &op.u, sizeof(op.u));
302	}
303#endif
304	return (rc);
305}
306
307static inline int
308HYPERVISOR_grant_table_op(
309	unsigned int cmd, void *uop, unsigned int count)
310{
311	return _hypercall3(int, grant_table_op, cmd, uop, count);
312}
313
314static inline int
315HYPERVISOR_update_va_mapping_otherdomain(
316	unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
317{
318	uint32_t hi, lo;
319
320	lo = (uint32_t)(new_val & 0xffffffff);
321	hi = (uint32_t)(new_val >> 32);
322
323	return _hypercall5(int, update_va_mapping_otherdomain, va,
324			   lo, hi, flags, domid);
325}
326
327static inline int
328HYPERVISOR_vm_assist(
329	unsigned int cmd, unsigned int type)
330{
331	return _hypercall2(int, vm_assist, cmd, type);
332}
333
334static inline int
335HYPERVISOR_vcpu_op(
336	int cmd, int vcpuid, void *extra_args)
337{
338	return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
339}
340
341static inline int
342HYPERVISOR_suspend(
343	unsigned long srec)
344{
345	struct sched_shutdown sched_shutdown = {
346		.reason = SHUTDOWN_suspend
347	};
348	int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
349			   &sched_shutdown, srec);
350#if CONFIG_XEN_COMPAT <= 0x030002
351	if (rc == -ENOXENSYS)
352		rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
353				 SHUTDOWN_suspend, srec);
354#endif
355	return (rc);
356}
357
358#if CONFIG_XEN_COMPAT <= 0x030002
359static inline int
360HYPERVISOR_nmi_op(
361        unsigned long op, void *arg)
362{
363        return _hypercall2(int, nmi_op, op, arg);
364}
365#endif
366
367static inline int
368HYPERVISOR_callback_op(
369        int cmd, void *arg)
370{
371        return _hypercall2(int, callback_op, cmd, arg);
372}
373
374#ifndef CONFIG_XEN
375static inline unsigned long
376HYPERVISOR_hvm_op(
377    int op, void *arg)
378{
379    return _hypercall2(unsigned long, hvm_op, op, arg);
380}
381#endif
382
383static inline int
384HYPERVISOR_xenoprof_op(
385        int op, void *arg)
386{
387        return _hypercall2(int, xenoprof_op, op, arg);
388}
389
390static inline int
391HYPERVISOR_kexec_op(
392        unsigned long op, void *args)
393{
394        return _hypercall2(int, kexec_op, op, args);
395}
396#endif /* __HYPERCALL_H__ */
397
398/*
399 * Local variables:
400 *  c-file-style: "linux"
401 *  indent-tabs-mode: t
402 *  c-indent-level: 8
403 *  c-basic-offset: 8
404 *  tab-width: 8
405 * End:
406 */
407