xref: /openbmc/linux/arch/x86/include/asm/xen/hypervisor.h (revision 55b37d9c)
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 
33 #ifndef _ASM_X86_XEN_HYPERVISOR_H
34 #define _ASM_X86_XEN_HYPERVISOR_H
35 
36 extern struct shared_info *HYPERVISOR_shared_info;
37 extern struct start_info *xen_start_info;
38 
39 #include <asm/processor.h>
40 
41 #define XEN_SIGNATURE "XenVMMXenVMM"
42 
43 static inline uint32_t xen_cpuid_base(void)
44 {
45 	return hypervisor_cpuid_base(XEN_SIGNATURE, 2);
46 }
47 
48 struct pci_dev;
49 
50 #ifdef CONFIG_XEN_PV_DOM0
51 bool xen_initdom_restore_msi(struct pci_dev *dev);
52 #else
53 static inline bool xen_initdom_restore_msi(struct pci_dev *dev) { return true; }
54 #endif
55 
56 #ifdef CONFIG_HOTPLUG_CPU
57 void xen_arch_register_cpu(int num);
58 void xen_arch_unregister_cpu(int num);
59 #endif
60 
61 #ifdef CONFIG_PVH
62 void __init xen_pvh_init(struct boot_params *boot_params);
63 void __init mem_map_via_hcall(struct boot_params *boot_params_p);
64 #endif
65 
66 #endif /* _ASM_X86_XEN_HYPERVISOR_H */
67