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a42089dd JF |
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 | */ | |
32 | ||
05e4d316 PA |
33 | #ifndef _ASM_X86_XEN_HYPERVISOR_H |
34 | #define _ASM_X86_XEN_HYPERVISOR_H | |
a42089dd | 35 | |
a42089dd JF |
36 | extern struct shared_info *HYPERVISOR_shared_info; |
37 | extern struct start_info *xen_start_info; | |
a42089dd | 38 | |
a4a7644c | 39 | #include <asm/bug.h> |
d9b8ca84 SY |
40 | #include <asm/processor.h> |
41 | ||
f422f853 PD |
42 | #define XEN_SIGNATURE "XenVMMXenVMM" |
43 | ||
d9b8ca84 SY |
44 | static inline uint32_t xen_cpuid_base(void) |
45 | { | |
f422f853 | 46 | return hypervisor_cpuid_base(XEN_SIGNATURE, 2); |
d9b8ca84 SY |
47 | } |
48 | ||
ae72f315 TG |
49 | struct pci_dev; |
50 | ||
91f7d2db | 51 | #ifdef CONFIG_XEN_PV_DOM0 |
ae72f315 TG |
52 | bool xen_initdom_restore_msi(struct pci_dev *dev); |
53 | #else | |
54 | static inline bool xen_initdom_restore_msi(struct pci_dev *dev) { return true; } | |
55 | #endif | |
56 | ||
a314e3eb SS |
57 | #ifdef CONFIG_HOTPLUG_CPU |
58 | void xen_arch_register_cpu(int num); | |
59 | void xen_arch_unregister_cpu(int num); | |
60 | #endif | |
61 | ||
76721679 JG |
62 | #ifdef CONFIG_PVH |
63 | void __init xen_pvh_init(struct boot_params *boot_params); | |
2a099192 | 64 | void __init mem_map_via_hcall(struct boot_params *boot_params_p); |
76721679 JG |
65 | #endif |
66 | ||
a4a7644c JG |
67 | /* Lazy mode for batching updates / context switch */ |
68 | enum xen_lazy_mode { | |
69 | XEN_LAZY_NONE, | |
70 | XEN_LAZY_MMU, | |
71 | XEN_LAZY_CPU, | |
72 | }; | |
73 | ||
74 | DECLARE_PER_CPU(enum xen_lazy_mode, xen_lazy_mode); | |
49147beb | 75 | DECLARE_PER_CPU(unsigned int, xen_lazy_nesting); |
a4a7644c JG |
76 | |
77 | static inline void enter_lazy(enum xen_lazy_mode mode) | |
78 | { | |
49147beb JG |
79 | enum xen_lazy_mode old_mode = this_cpu_read(xen_lazy_mode); |
80 | ||
81 | if (mode == old_mode) { | |
82 | this_cpu_inc(xen_lazy_nesting); | |
83 | return; | |
84 | } | |
85 | ||
86 | BUG_ON(old_mode != XEN_LAZY_NONE); | |
a4a7644c JG |
87 | |
88 | this_cpu_write(xen_lazy_mode, mode); | |
89 | } | |
90 | ||
91 | static inline void leave_lazy(enum xen_lazy_mode mode) | |
92 | { | |
93 | BUG_ON(this_cpu_read(xen_lazy_mode) != mode); | |
94 | ||
49147beb JG |
95 | if (this_cpu_read(xen_lazy_nesting) == 0) |
96 | this_cpu_write(xen_lazy_mode, XEN_LAZY_NONE); | |
97 | else | |
98 | this_cpu_dec(xen_lazy_nesting); | |
a4a7644c JG |
99 | } |
100 | ||
101 | enum xen_lazy_mode xen_get_lazy_mode(void); | |
102 | ||
bfa993b3 RPM |
103 | #if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) |
104 | void xen_sanitize_proc_cap_bits(uint32_t *buf); | |
105 | #else | |
106 | static inline void xen_sanitize_proc_cap_bits(uint32_t *buf) | |
107 | { | |
108 | BUG(); | |
109 | } | |
110 | #endif | |
111 | ||
05e4d316 | 112 | #endif /* _ASM_X86_XEN_HYPERVISOR_H */ |