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