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
237#if defined(XEN)
238int HYPERVISOR_multicall(multicall_entry_t *, int);
239static inline int
240_HYPERVISOR_multicall(
241#else /* XENHVM */
242static inline int
243HYPERVISOR_multicall(
244#endif
245	void *call_list, int nr_calls)
246{
247	return _hypercall2(int, multicall, call_list, nr_calls);
248}
249
250static inline int
251HYPERVISOR_update_va_mapping(
252	unsigned long va, uint64_t new_val, unsigned long flags)
253{
254	uint32_t hi, lo;
255
256	lo = (uint32_t)(new_val & 0xffffffff);
257	hi = (uint32_t)(new_val >> 32);
258
259	return _hypercall4(int, update_va_mapping, va,
260			   lo, hi, flags);
261}
262
263static inline int
264HYPERVISOR_event_channel_op(
265	int cmd, void *arg)
266{
267	int rc = _hypercall2(int, event_channel_op, cmd, arg);
268
269#if CONFIG_XEN_COMPAT <= 0x030002
270	if (__predict_false(rc == -ENOXENSYS)) {
271		struct evtchn_op op;
272		op.cmd = cmd;
273		memcpy(&op.u, arg, sizeof(op.u));
274		rc = _hypercall1(int, event_channel_op_compat, &op);
275		memcpy(arg, &op.u, sizeof(op.u));
276	}
277#endif
278	return (rc);
279}
280
281static inline int
282HYPERVISOR_xen_version(
283	int cmd, void *arg)
284{
285	return _hypercall2(int, xen_version, cmd, arg);
286}
287
288static inline int
289HYPERVISOR_console_io(
290	int cmd, int count, char *str)
291{
292	return _hypercall3(int, console_io, cmd, count, str);
293}
294
295static inline int
296HYPERVISOR_physdev_op(
297	int cmd, void *arg)
298{
299	int rc = _hypercall2(int, physdev_op, cmd, arg);
300#if CONFIG_XEN_COMPAT <= 0x030002
301	if (__predict_false(rc == -ENOXENSYS)) {
302		struct physdev_op op;
303		op.cmd = cmd;
304		memcpy(&op.u, arg, sizeof(op.u));
305		rc = _hypercall1(int, physdev_op_compat, &op);
306		memcpy(arg, &op.u, sizeof(op.u));
307	}
308#endif
309	return (rc);
310}
311
312static inline int
313HYPERVISOR_grant_table_op(
314	unsigned int cmd, void *uop, unsigned int count)
315{
316	return _hypercall3(int, grant_table_op, cmd, uop, count);
317}
318
319static inline int
320HYPERVISOR_update_va_mapping_otherdomain(
321	unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
322{
323	uint32_t hi, lo;
324
325	lo = (uint32_t)(new_val & 0xffffffff);
326	hi = (uint32_t)(new_val >> 32);
327
328	return _hypercall5(int, update_va_mapping_otherdomain, va,
329			   lo, hi, flags, domid);
330}
331
332static inline int
333HYPERVISOR_vm_assist(
334	unsigned int cmd, unsigned int type)
335{
336	return _hypercall2(int, vm_assist, cmd, type);
337}
338
339static inline int
340HYPERVISOR_vcpu_op(
341	int cmd, int vcpuid, void *extra_args)
342{
343	return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
344}
345
346static inline int
347HYPERVISOR_suspend(
348	unsigned long srec)
349{
350	struct sched_shutdown sched_shutdown = {
351		.reason = SHUTDOWN_suspend
352	};
353	int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
354			   &sched_shutdown, srec);
355#if CONFIG_XEN_COMPAT <= 0x030002
356	if (rc == -ENOXENSYS)
357		rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
358				 SHUTDOWN_suspend, srec);
359#endif
360	return (rc);
361}
362
363#if CONFIG_XEN_COMPAT <= 0x030002
364static inline int
365HYPERVISOR_nmi_op(
366        unsigned long op, void *arg)
367{
368        return _hypercall2(int, nmi_op, op, arg);
369}
370#endif
371
372static inline int
373HYPERVISOR_callback_op(
374        int cmd, void *arg)
375{
376        return _hypercall2(int, callback_op, cmd, arg);
377}
378
379#ifndef CONFIG_XEN
380static inline unsigned long
381HYPERVISOR_hvm_op(
382    int op, void *arg)
383{
384    return _hypercall2(unsigned long, hvm_op, op, arg);
385}
386#endif
387
388static inline int
389HYPERVISOR_xenoprof_op(
390        int op, void *arg)
391{
392        return _hypercall2(int, xenoprof_op, op, arg);
393}
394
395static inline int
396HYPERVISOR_kexec_op(
397        unsigned long op, void *args)
398{
399        return _hypercall2(int, kexec_op, op, args);
400}
401#endif /* __HYPERCALL_H__ */
402
403/*
404 * Local variables:
405 *  c-file-style: "linux"
406 *  indent-tabs-mode: t
407 *  c-indent-level: 8
408 *  c-basic-offset: 8
409 *  tab-width: 8
410 * End:
411 */
412