xref: /openbmc/linux/include/xen/xen.h (revision 3d40aed8)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _XEN_XEN_H
3 #define _XEN_XEN_H
4 
5 #include <linux/types.h>
6 
7 enum xen_domain_type {
8 	XEN_NATIVE,		/* running on bare hardware    */
9 	XEN_PV_DOMAIN,		/* running in a PV domain      */
10 	XEN_HVM_DOMAIN,		/* running in a Xen hvm domain */
11 };
12 
13 #ifdef CONFIG_XEN
14 extern enum xen_domain_type xen_domain_type;
15 #else
16 #define xen_domain_type		XEN_NATIVE
17 #endif
18 
19 #ifdef CONFIG_XEN_PVH
20 extern bool xen_pvh;
21 #else
22 #define xen_pvh			0
23 #endif
24 
25 #define xen_domain()		(xen_domain_type != XEN_NATIVE)
26 #define xen_pv_domain()		(xen_domain_type == XEN_PV_DOMAIN)
27 #define xen_hvm_domain()	(xen_domain_type == XEN_HVM_DOMAIN)
28 #define xen_pvh_domain()	(xen_pvh)
29 
30 extern uint32_t xen_start_flags;
31 
32 #include <xen/interface/hvm/start_info.h>
33 extern struct hvm_start_info pvh_start_info;
34 void xen_prepare_pvh(void);
35 struct pt_regs;
36 void xen_pv_evtchn_do_upcall(struct pt_regs *regs);
37 
38 #ifdef CONFIG_XEN_DOM0
39 #include <xen/interface/xen.h>
40 #include <asm/xen/hypervisor.h>
41 
42 #define xen_initial_domain()	(xen_domain() && \
43 				 (xen_start_flags & SIF_INITDOMAIN))
44 #else  /* !CONFIG_XEN_DOM0 */
45 #define xen_initial_domain()	(0)
46 #endif	/* CONFIG_XEN_DOM0 */
47 
48 struct bio_vec;
49 struct page;
50 
51 bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
52 		const struct page *page);
53 
54 #if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
55 extern u64 xen_saved_max_mem_size;
56 #endif
57 
58 #ifdef CONFIG_XEN_UNPOPULATED_ALLOC
59 int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
60 void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);
61 #include <linux/ioport.h>
62 int arch_xen_unpopulated_init(struct resource **res);
63 #else
64 #include <xen/balloon.h>
65 static inline int xen_alloc_unpopulated_pages(unsigned int nr_pages,
66 		struct page **pages)
67 {
68 	return xen_alloc_ballooned_pages(nr_pages, pages);
69 }
70 static inline void xen_free_unpopulated_pages(unsigned int nr_pages,
71 		struct page **pages)
72 {
73 	xen_free_ballooned_pages(nr_pages, pages);
74 }
75 #endif
76 
77 #if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) && defined(CONFIG_X86)
78 bool __init xen_processor_present(uint32_t acpi_id);
79 #else
80 #include <linux/bug.h>
81 static inline bool xen_processor_present(uint32_t acpi_id)
82 {
83 	BUG();
84 	return false;
85 }
86 #endif
87 
88 #endif	/* _XEN_XEN_H */
89