1 /******************************************************************************
4 * Linux-specific hypervisor handling.
6 * Copyright (c) 2002-2004, K A Fraser
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:
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:
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
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
33 #ifndef __HYPERCALL_H__
34 #define __HYPERCALL_H__
36 #include <linux/errno.h>
37 #include <linux/string.h>
39 #include <xen/interface/xen.h>
40 #include <xen/interface/sched.h>
41 #include <xen/interface/physdev.h>
43 extern struct { char _entry[32]; } hypercall_page[];
45 #define _hypercall0(type, name) \
51 : [call] "m" (hypercall_page[__HYPERVISOR_##name]) \
56 #define _hypercall1(type, name, a1) \
61 : "=a" (__res), "=b" (__ign1) \
63 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \
68 #define _hypercall2(type, name, a1, a2) \
70 long __res, __ign1, __ign2; \
73 : "=a" (__res), "=b" (__ign1), "=c" (__ign2) \
74 : "1" ((long)(a1)), "2" ((long)(a2)), \
75 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \
80 #define _hypercall3(type, name, a1, a2, a3) \
82 long __res, __ign1, __ign2, __ign3; \
85 : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
87 : "1" ((long)(a1)), "2" ((long)(a2)), \
89 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \
94 #define _hypercall4(type, name, a1, a2, a3, a4) \
96 long __res, __ign1, __ign2, __ign3, __ign4; \
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]) \
108 #define _hypercall5(type, name, a1, a2, a3, a4, a5) \
110 long __res, __ign1, __ign2, __ign3, __ign4, __ign5; \
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)), \
118 [call] "m" (hypercall_page[__HYPERVISOR_##name]) \
124 HYPERVISOR_set_trap_table(struct trap_info *table)
126 return _hypercall1(int, set_trap_table, table);
130 HYPERVISOR_mmu_update(struct mmu_update *req, int count,
131 int *success_count, domid_t domid)
133 return _hypercall4(int, mmu_update, req, count, success_count, domid);
137 HYPERVISOR_mmuext_op(struct mmuext_op *op, int count,
138 int *success_count, domid_t domid)
140 return _hypercall4(int, mmuext_op, op, count, success_count, domid);
144 HYPERVISOR_set_gdt(unsigned long *frame_list, int entries)
146 return _hypercall2(int, set_gdt, frame_list, entries);
150 HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp)
152 return _hypercall2(int, stack_switch, ss, esp);
156 HYPERVISOR_set_callbacks(unsigned long event_selector,
157 unsigned long event_address,
158 unsigned long failsafe_selector,
159 unsigned long failsafe_address)
161 return _hypercall4(int, set_callbacks,
162 event_selector, event_address,
163 failsafe_selector, failsafe_address);
167 HYPERVISOR_callback_op(int cmd, void *arg)
169 return _hypercall2(int, callback_op, cmd, arg);
173 HYPERVISOR_fpu_taskswitch(int set)
175 return _hypercall1(int, fpu_taskswitch, set);
179 HYPERVISOR_sched_op(int cmd, unsigned long arg)
181 return _hypercall2(int, sched_op, cmd, arg);
185 HYPERVISOR_set_timer_op(u64 timeout)
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);
193 HYPERVISOR_set_debugreg(int reg, unsigned long value)
195 return _hypercall2(int, set_debugreg, reg, value);
198 static inline unsigned long
199 HYPERVISOR_get_debugreg(int reg)
201 return _hypercall1(unsigned long, get_debugreg, reg);
205 HYPERVISOR_update_descriptor(u64 ma, u64 desc)
207 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
211 HYPERVISOR_memory_op(unsigned int cmd, void *arg)
213 return _hypercall2(int, memory_op, cmd, arg);
217 HYPERVISOR_multicall(void *call_list, int nr_calls)
219 return _hypercall2(int, multicall, call_list, nr_calls);
223 HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
226 unsigned long pte_hi = 0;
227 #ifdef CONFIG_X86_PAE
228 pte_hi = new_val.pte_high;
230 return _hypercall4(int, update_va_mapping, va,
231 new_val.pte_low, pte_hi, flags);
235 HYPERVISOR_event_channel_op(int cmd, void *arg)
237 int rc = _hypercall2(int, event_channel_op, cmd, arg);
238 if (unlikely(rc == -ENOSYS)) {
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));
249 HYPERVISOR_xen_version(int cmd, void *arg)
251 return _hypercall2(int, xen_version, cmd, arg);
255 HYPERVISOR_console_io(int cmd, int count, char *str)
257 return _hypercall3(int, console_io, cmd, count, str);
261 HYPERVISOR_physdev_op(int cmd, void *arg)
263 int rc = _hypercall2(int, physdev_op, cmd, arg);
264 if (unlikely(rc == -ENOSYS)) {
265 struct physdev_op op;
267 memcpy(&op.u, arg, sizeof(op.u));
268 rc = _hypercall1(int, physdev_op_compat, &op);
269 memcpy(arg, &op.u, sizeof(op.u));
275 HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
277 return _hypercall3(int, grant_table_op, cmd, uop, count);
281 HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val,
282 unsigned long flags, domid_t domid)
284 unsigned long pte_hi = 0;
285 #ifdef CONFIG_X86_PAE
286 pte_hi = new_val.pte_high;
288 return _hypercall5(int, update_va_mapping_otherdomain, va,
289 new_val.pte_low, pte_hi, flags, domid);
293 HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
295 return _hypercall2(int, vm_assist, cmd, type);
299 HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
301 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
305 HYPERVISOR_suspend(unsigned long srec)
307 return _hypercall3(int, sched_op, SCHEDOP_shutdown,
308 SHUTDOWN_suspend, srec);
312 HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
314 return _hypercall2(int, nmi_op, op, arg);
318 MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
319 pte_t new_val, unsigned long flags)
321 mcl->op = __HYPERVISOR_update_va_mapping;
323 #ifdef CONFIG_X86_PAE
324 mcl->args[1] = new_val.pte_low;
325 mcl->args[2] = new_val.pte_high;
327 mcl->args[1] = new_val.pte_low;
330 mcl->args[3] = flags;
334 MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
335 void *uop, unsigned int count)
337 mcl->op = __HYPERVISOR_grant_table_op;
339 mcl->args[1] = (unsigned long)uop;
340 mcl->args[2] = count;
344 MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
345 pte_t new_val, unsigned long flags,
348 mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
350 #ifdef CONFIG_X86_PAE
351 mcl->args[1] = new_val.pte_low;
352 mcl->args[2] = new_val.pte_high;
354 mcl->args[1] = new_val.pte_low;
357 mcl->args[3] = flags;
358 mcl->args[4] = domid;
362 MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
363 struct desc_struct desc)
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;
373 MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
375 mcl->op = __HYPERVISOR_memory_op;
377 mcl->args[1] = (unsigned long)arg;
381 MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
382 int count, int *success_count, domid_t domid)
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;
392 MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
393 int *success_count, domid_t domid)
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;
403 MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries)
405 mcl->op = __HYPERVISOR_set_gdt;
406 mcl->args[0] = (unsigned long)frames;
407 mcl->args[1] = entries;
411 MULTI_stack_switch(struct multicall_entry *mcl,
412 unsigned long ss, unsigned long esp)
414 mcl->op = __HYPERVISOR_stack_switch;
419 #endif /* __HYPERCALL_H__ */