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 __HYPERVISOR_H__
34 #define __HYPERVISOR_H__
37 extern int running_on_xen;
38 #define is_running_on_xen() (running_on_xen)
39 #else /* CONFIG_XEN */
40 # ifdef CONFIG_VMX_GUEST
41 # define is_running_on_xen() (1)
42 # else /* CONFIG_VMX_GUEST */
43 # define is_running_on_xen() (0)
44 # define HYPERVISOR_ioremap(offset, size) (offset)
45 # endif /* CONFIG_VMX_GUEST */
46 #endif /* CONFIG_XEN */
48 #if defined(CONFIG_XEN) || defined(CONFIG_VMX_GUEST)
49 #include <linux/types.h>
50 #include <linux/kernel.h>
51 #include <linux/version.h>
52 #include <linux/errno.h>
53 #include <xen/interface/xen.h>
54 #include <xen/interface/dom0_ops.h>
55 #include <xen/interface/event_channel.h>
56 #include <xen/interface/physdev.h>
57 #include <xen/interface/sched.h>
58 #include <asm/hypercall.h>
59 #include <asm/ptrace.h>
62 extern shared_info_t *HYPERVISOR_shared_info;
63 extern start_info_t *xen_start_info;
65 void force_evtchn_callback(void);
67 #ifndef CONFIG_VMX_GUEST
68 /* Turn jiffies into Xen system time. XXX Implement me. */
69 #define jiffies_to_st(j) 0
75 int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
78 rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
87 int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
90 rc = HYPERVISOR_sched_op_compat(SCHEDOP_block, 0);
99 struct sched_shutdown sched_shutdown = {
103 int rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
106 rc = HYPERVISOR_sched_op_compat(SCHEDOP_shutdown, reason);
113 evtchn_port_t *ports, unsigned int nr_ports, u64 timeout)
115 struct sched_poll sched_poll = {
116 .nr_ports = nr_ports,
117 .timeout = jiffies_to_st(timeout)
122 set_xen_guest_handle(sched_poll.ports, ports);
123 rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
125 rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
130 #include <asm/hypercall.h>
132 // for drivers/xen/privcmd/privcmd.c
133 #define machine_to_phys_mapping 0
134 struct vm_area_struct;
135 int direct_remap_pfn_range(struct vm_area_struct *vma,
136 unsigned long address,
142 int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma);
143 int privcmd_mmap(struct file * file, struct vm_area_struct * vma);
144 #define HAVE_ARCH_PRIVCMD_MMAP
146 // for drivers/xen/balloon/balloon.c
147 #ifdef CONFIG_XEN_SCRUB_PAGES
148 #define scrub_pages(_p,_n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
150 #define scrub_pages(_p,_n) ((void)0)
152 #define pte_mfn(_x) pte_pfn(_x)
153 #define phys_to_machine_mapping_valid(_x) (1)
155 #endif /* !CONFIG_VMX_GUEST */
157 #define __pte_ma(_x) ((pte_t) {(_x)}) /* unmodified use */
158 #define pfn_pte_ma(_x,_y) __pte_ma(0) /* unmodified use */
160 #ifndef CONFIG_VMX_GUEST
161 int __xen_create_contiguous_region(unsigned long vstart, unsigned int order, unsigned int address_bits);
163 xen_create_contiguous_region(unsigned long vstart,
164 unsigned int order, unsigned int address_bits)
167 if (is_running_on_xen()) {
168 ret = __xen_create_contiguous_region(vstart, order,
174 void __xen_destroy_contiguous_region(unsigned long vstart, unsigned int order);
176 xen_destroy_contiguous_region(unsigned long vstart, unsigned int order)
178 if (is_running_on_xen())
179 __xen_destroy_contiguous_region(vstart, order);
182 #endif /* !CONFIG_VMX_GUEST */
184 // for netfront.c, netback.c
185 #define MULTI_UVMFLAGS_INDEX 0 //XXX any value
188 MULTI_update_va_mapping(
189 multicall_entry_t *mcl, unsigned long va,
190 pte_t new_val, unsigned long flags)
192 mcl->op = __HYPERVISOR_update_va_mapping;
197 MULTI_grant_table_op(multicall_entry_t *mcl, unsigned int cmd,
198 void *uop, unsigned int count)
200 mcl->op = __HYPERVISOR_grant_table_op;
202 mcl->args[1] = (unsigned long)uop;
203 mcl->args[2] = count;
207 asmlinkage int xprintk(const char *fmt, ...);
208 #define xprintd(fmt, ...) xprintk("%s:%d " fmt, __func__, __LINE__, \
211 #endif /* CONFIG_XEN || CONFIG_VMX_GUEST */
213 #ifdef CONFIG_XEN_PRIVILEGED_GUEST
214 #define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
216 #define is_initial_xendomain() 0
219 #endif /* __HYPERVISOR_H__ */