hypercall.h revision 263010 
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#define HYPERCALL_STR(name)                                     \
43        "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
44
45#define _hypercall0(type, name)                 \
46({                                              \
47        long __res;                             \
48        __asm__ volatile (                          \
49                HYPERCALL_STR(name)             \
50                : "=a" (__res)                  \
51                :                               \
52                : "memory" );                   \
53        (type)__res;                            \
54})
55
56#define _hypercall1(type, name, a1)                             \
57({                                                              \
58        long __res, __ign1;                                     \
59        __asm__ volatile (                                          \
60                HYPERCALL_STR(name)                             \
61                : "=a" (__res), "=b" (__ign1)                   \
62                : "1" ((long)(a1))                              \
63                : "memory" );                                   \
64        (type)__res;                                            \
65})
66
67#define _hypercall2(type, name, a1, a2)                         \
68({                                                              \
69        long __res, __ign1, __ign2;                             \
70        __asm__ volatile (                                          \
71                HYPERCALL_STR(name)                             \
72                : "=a" (__res), "=b" (__ign1), "=c" (__ign2)    \
73                : "1" ((long)(a1)), "2" ((long)(a2))            \
74                : "memory" );                                   \
75        (type)__res;                                            \
76})
77
78#define _hypercall3(type, name, a1, a2, a3)                     \
79({                                                              \
80        long __res, __ign1, __ign2, __ign3;                     \
81        __asm__ volatile (                                          \
82                HYPERCALL_STR(name)                             \
83                : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
84                "=d" (__ign3)                                   \
85                : "1" ((long)(a1)), "2" ((long)(a2)),           \
86                "3" ((long)(a3))                                \
87                : "memory" );                                   \
88        (type)__res;                                            \
89})
90
91#define _hypercall4(type, name, a1, a2, a3, a4)                 \
92({                                                              \
93        long __res, __ign1, __ign2, __ign3, __ign4;             \
94        __asm__ volatile (                                          \
95                HYPERCALL_STR(name)                             \
96                : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
97                "=d" (__ign3), "=S" (__ign4)                    \
98                : "1" ((long)(a1)), "2" ((long)(a2)),           \
99                "3" ((long)(a3)), "4" ((long)(a4))              \
100                : "memory" );                                   \
101        (type)__res;                                            \
102})
103
104#define _hypercall5(type, name, a1, a2, a3, a4, a5)             \
105({                                                              \
106        long __res, __ign1, __ign2, __ign3, __ign4, __ign5;     \
107        __asm__ volatile (                                          \
108                HYPERCALL_STR(name)                             \
109                : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
110                "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)     \
111                : "1" ((long)(a1)), "2" ((long)(a2)),           \
112                "3" ((long)(a3)), "4" ((long)(a4)),             \
113                "5" ((long)(a5))                                \
114                : "memory" );                                   \
115        (type)__res;                                            \
116})
117
118static inline int
119HYPERVISOR_set_trap_table(
120	trap_info_t *table)
121{
122	return _hypercall1(int, set_trap_table, table);
123}
124
125static inline int
126HYPERVISOR_mmu_update(
127	mmu_update_t *req, int count, int *success_count, domid_t domid)
128{
129	return _hypercall4(int, mmu_update, req, count, success_count, domid);
130}
131
132static inline int
133HYPERVISOR_mmuext_op(
134	mmuext_op_t *op, int count, int *success_count, domid_t domid)
135{
136	return _hypercall4(int, mmuext_op, op, count, success_count, domid);
137}
138
139static inline int
140HYPERVISOR_set_gdt(
141	unsigned long *frame_list, int entries)
142{
143	return _hypercall2(int, set_gdt, frame_list, entries);
144}
145
146static inline int
147HYPERVISOR_stack_switch(
148	unsigned long ss, unsigned long esp)
149{
150	return _hypercall2(int, stack_switch, ss, esp);
151}
152
153static inline int
154HYPERVISOR_set_callbacks(
155	unsigned long event_selector, unsigned long event_address,
156	unsigned long failsafe_selector, unsigned long failsafe_address)
157{
158	return _hypercall4(int, set_callbacks,
159			   event_selector, event_address,
160			   failsafe_selector, failsafe_address);
161}
162
163static inline int
164HYPERVISOR_fpu_taskswitch(
165	int set)
166{
167	return _hypercall1(int, fpu_taskswitch, set);
168}
169
170static inline int
171HYPERVISOR_sched_op_compat(
172	int cmd, unsigned long arg)
173{
174	return _hypercall2(int, sched_op_compat, cmd, arg);
175}
176
177static inline int
178HYPERVISOR_sched_op(
179	int cmd, void *arg)
180{
181	return _hypercall2(int, sched_op, cmd, arg);
182}
183
184static inline long
185HYPERVISOR_set_timer_op(
186	uint64_t timeout)
187{
188	unsigned long timeout_hi = (unsigned long)(timeout>>32);
189	unsigned long timeout_lo = (unsigned long)timeout;
190	return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
191}
192#if 0
193static inline int
194HYPERVISOR_platform_op(
195        struct xen_platform_op *platform_op)
196{
197        platform_op->interface_version = XENPF_INTERFACE_VERSION;
198        return _hypercall1(int, platform_op, platform_op);
199}
200#endif
201static inline int
202HYPERVISOR_set_debugreg(
203	int reg, unsigned long value)
204{
205	return _hypercall2(int, set_debugreg, reg, value);
206}
207
208static inline unsigned long
209HYPERVISOR_get_debugreg(
210	int reg)
211{
212	return _hypercall1(unsigned long, get_debugreg, reg);
213}
214
215static inline int
216HYPERVISOR_update_descriptor(
217	uint64_t ma, uint64_t desc)
218{
219	return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
220}
221
222static inline int
223HYPERVISOR_memory_op(
224	unsigned int cmd, void *arg)
225{
226	return _hypercall2(int, memory_op, cmd, arg);
227}
228
229#if defined(XEN)
230int HYPERVISOR_multicall(multicall_entry_t *, int);
231static inline int
232_HYPERVISOR_multicall(
233#else /* XENHVM */
234static inline int
235HYPERVISOR_multicall(
236#endif
237	void *call_list, int nr_calls)
238{
239	return _hypercall2(int, multicall, call_list, nr_calls);
240}
241
242static inline int
243HYPERVISOR_update_va_mapping(
244	unsigned long va, uint64_t new_val, unsigned long flags)
245{
246	uint32_t hi, lo;
247
248	lo = (uint32_t)(new_val & 0xffffffff);
249	hi = (uint32_t)(new_val >> 32);
250
251	return _hypercall4(int, update_va_mapping, va,
252			   lo, hi, flags);
253}
254
255static inline int
256HYPERVISOR_event_channel_op(
257	int cmd, void *arg)
258{
259	int rc = _hypercall2(int, event_channel_op, cmd, arg);
260
261#if CONFIG_XEN_COMPAT <= 0x030002
262	if (__predict_false(rc == -ENOXENSYS)) {
263		struct evtchn_op op;
264		op.cmd = cmd;
265		memcpy(&op.u, arg, sizeof(op.u));
266		rc = _hypercall1(int, event_channel_op_compat, &op);
267		memcpy(arg, &op.u, sizeof(op.u));
268	}
269#endif
270	return (rc);
271}
272
273static inline int
274HYPERVISOR_xen_version(
275	int cmd, void *arg)
276{
277	return _hypercall2(int, xen_version, cmd, arg);
278}
279
280static inline int
281HYPERVISOR_console_io(
282	int cmd, int count, char *str)
283{
284	return _hypercall3(int, console_io, cmd, count, str);
285}
286
287static inline int
288HYPERVISOR_physdev_op(
289	int cmd, void *arg)
290{
291	int rc = _hypercall2(int, physdev_op, cmd, arg);
292#if CONFIG_XEN_COMPAT <= 0x030002
293	if (__predict_false(rc == -ENOXENSYS)) {
294		struct physdev_op op;
295		op.cmd = cmd;
296		memcpy(&op.u, arg, sizeof(op.u));
297		rc = _hypercall1(int, physdev_op_compat, &op);
298		memcpy(arg, &op.u, sizeof(op.u));
299	}
300#endif
301	return (rc);
302}
303
304static inline int
305HYPERVISOR_grant_table_op(
306	unsigned int cmd, void *uop, unsigned int count)
307{
308	return _hypercall3(int, grant_table_op, cmd, uop, count);
309}
310
311static inline int
312HYPERVISOR_update_va_mapping_otherdomain(
313	unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
314{
315	uint32_t hi, lo;
316
317	lo = (uint32_t)(new_val & 0xffffffff);
318	hi = (uint32_t)(new_val >> 32);
319
320	return _hypercall5(int, update_va_mapping_otherdomain, va,
321			   lo, hi, flags, domid);
322}
323
324static inline int
325HYPERVISOR_vm_assist(
326	unsigned int cmd, unsigned int type)
327{
328	return _hypercall2(int, vm_assist, cmd, type);
329}
330
331static inline int
332HYPERVISOR_vcpu_op(
333	int cmd, int vcpuid, void *extra_args)
334{
335	return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
336}
337
338static inline int
339HYPERVISOR_suspend(
340	unsigned long srec)
341{
342	struct sched_shutdown sched_shutdown = {
343		.reason = SHUTDOWN_suspend
344	};
345	int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
346			   &sched_shutdown, srec);
347#if CONFIG_XEN_COMPAT <= 0x030002
348	if (rc == -ENOXENSYS)
349		rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
350				 SHUTDOWN_suspend, srec);
351#endif
352	return (rc);
353}
354
355#if CONFIG_XEN_COMPAT <= 0x030002
356static inline int
357HYPERVISOR_nmi_op(
358        unsigned long op, void *arg)
359{
360        return _hypercall2(int, nmi_op, op, arg);
361}
362#endif
363
364static inline int
365HYPERVISOR_callback_op(
366        int cmd, void *arg)
367{
368        return _hypercall2(int, callback_op, cmd, arg);
369}
370
371#ifndef CONFIG_XEN
372static inline unsigned long
373HYPERVISOR_hvm_op(
374    int op, void *arg)
375{
376    return _hypercall2(unsigned long, hvm_op, op, arg);
377}
378#endif
379
380static inline int
381HYPERVISOR_xenoprof_op(
382        int op, void *arg)
383{
384        return _hypercall2(int, xenoprof_op, op, arg);
385}
386
387static inline int
388HYPERVISOR_kexec_op(
389        unsigned long op, void *args)
390{
391        return _hypercall2(int, kexec_op, op, args);
392}
393#endif /* __HYPERCALL_H__ */
394
395/*
396 * Local variables:
397 *  c-file-style: "linux"
398 *  indent-tabs-mode: t
399 *  c-indent-level: 8
400 *  c-basic-offset: 8
401 *  tab-width: 8
402 * End:
403 */
404