direct-io.hg

view linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h @ 12271:f56b7ade7068

[BLKTAP] ia64 support
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author kfraser@localhost.localdomain
date Tue Nov 07 11:17:39 2006 +0000 (2006-11-07)
parents b725c9e51a7c
children 105ac9be9b3d
line source
1 /******************************************************************************
2 * hypervisor.h
3 *
4 * Linux-specific hypervisor handling.
5 *
6 * Copyright (c) 2002-2004, K A Fraser
7 *
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:
13 *
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:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
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
30 * IN THE SOFTWARE.
31 */
33 #ifndef __HYPERVISOR_H__
34 #define __HYPERVISOR_H__
36 #ifdef CONFIG_XEN
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/config.h>
50 #include <linux/types.h>
51 #include <linux/kernel.h>
52 #include <linux/version.h>
53 #include <linux/errno.h>
54 #include <xen/interface/xen.h>
55 #include <xen/interface/dom0_ops.h>
56 #include <xen/interface/event_channel.h>
57 #include <xen/interface/physdev.h>
58 #include <xen/interface/sched.h>
59 #include <asm/hypercall.h>
60 #include <asm/ptrace.h>
61 #include <asm/page.h>
63 extern shared_info_t *HYPERVISOR_shared_info;
64 extern start_info_t *xen_start_info;
66 void force_evtchn_callback(void);
68 #ifndef CONFIG_VMX_GUEST
69 /* Turn jiffies into Xen system time. XXX Implement me. */
70 #define jiffies_to_st(j) 0
72 static inline int
73 HYPERVISOR_yield(
74 void)
75 {
76 int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
78 return rc;
79 }
81 static inline int
82 HYPERVISOR_block(
83 void)
84 {
85 int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
87 return rc;
88 }
90 static inline int
91 HYPERVISOR_shutdown(
92 unsigned int reason)
93 {
94 struct sched_shutdown sched_shutdown = {
95 .reason = reason
96 };
98 int rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
100 return rc;
101 }
103 static inline int
104 HYPERVISOR_poll(
105 evtchn_port_t *ports, unsigned int nr_ports, u64 timeout)
106 {
107 struct sched_poll sched_poll = {
108 .nr_ports = nr_ports,
109 .timeout = jiffies_to_st(timeout)
110 };
112 int rc;
114 set_xen_guest_handle(sched_poll.ports, ports);
115 rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
117 return rc;
118 }
120 // for drivers/xen/privcmd/privcmd.c
121 #define machine_to_phys_mapping 0
122 struct vm_area_struct;
123 int direct_remap_pfn_range(struct vm_area_struct *vma,
124 unsigned long address,
125 unsigned long mfn,
126 unsigned long size,
127 pgprot_t prot,
128 domid_t domid);
129 struct file;
130 int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma);
131 int privcmd_mmap(struct file * file, struct vm_area_struct * vma);
132 #define HAVE_ARCH_PRIVCMD_MMAP
134 // for drivers/xen/balloon/balloon.c
135 #ifdef CONFIG_XEN_SCRUB_PAGES
136 #define scrub_pages(_p,_n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
137 #else
138 #define scrub_pages(_p,_n) ((void)0)
139 #endif
140 #define pte_mfn(_x) pte_pfn(_x)
141 #define phys_to_machine_mapping_valid(_x) (1)
143 #endif /* !CONFIG_VMX_GUEST */
145 #define __pte_ma(_x) ((pte_t) {(_x)}) /* unmodified use */
146 #define pfn_pte_ma(_x,_y) __pte_ma(0) /* unmodified use */
148 #ifndef CONFIG_VMX_GUEST
149 int __xen_create_contiguous_region(unsigned long vstart, unsigned int order, unsigned int address_bits);
150 static inline int
151 xen_create_contiguous_region(unsigned long vstart,
152 unsigned int order, unsigned int address_bits)
153 {
154 int ret = 0;
155 if (is_running_on_xen()) {
156 ret = __xen_create_contiguous_region(vstart, order,
157 address_bits);
158 }
159 return ret;
160 }
162 void __xen_destroy_contiguous_region(unsigned long vstart, unsigned int order);
163 static inline void
164 xen_destroy_contiguous_region(unsigned long vstart, unsigned int order)
165 {
166 if (is_running_on_xen())
167 __xen_destroy_contiguous_region(vstart, order);
168 }
170 #endif /* !CONFIG_VMX_GUEST */
172 // for netfront.c, netback.c
173 #define MULTI_UVMFLAGS_INDEX 0 //XXX any value
175 static inline void
176 MULTI_update_va_mapping(
177 multicall_entry_t *mcl, unsigned long va,
178 pte_t new_val, unsigned long flags)
179 {
180 mcl->op = __HYPERVISOR_update_va_mapping;
181 mcl->result = 0;
182 }
184 static inline void
185 MULTI_grant_table_op(multicall_entry_t *mcl, unsigned int cmd,
186 void *uop, unsigned int count)
187 {
188 mcl->op = __HYPERVISOR_grant_table_op;
189 mcl->args[0] = cmd;
190 mcl->args[1] = (unsigned long)uop;
191 mcl->args[2] = count;
192 }
194 /*
195 * for blktap.c
196 * int create_lookup_pte_addr(struct mm_struct *mm,
197 * unsigned long address,
198 * uint64_t *ptep);
199 */
200 #define create_lookup_pte_addr(mm, address, ptep) \
201 ({ \
202 printk(KERN_EMERG \
203 "%s:%d " \
204 "create_lookup_pte_addr() isn't supported.\n", \
205 __func__, __LINE__); \
206 BUG(); \
207 (-ENOSYS); \
208 })
210 // for debug
211 asmlinkage int xprintk(const char *fmt, ...);
212 #define xprintd(fmt, ...) xprintk("%s:%d " fmt, __func__, __LINE__, \
213 ##__VA_ARGS__)
215 #endif /* CONFIG_XEN || CONFIG_VMX_GUEST */
217 #ifdef CONFIG_XEN_PRIVILEGED_GUEST
218 #define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
219 #else
220 #define is_initial_xendomain() 0
221 #endif
223 #endif /* __HYPERVISOR_H__ */