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4c071ee5 SS |
1 | #include <xen/xen.h> |
2 | #include <xen/interface/xen.h> | |
3 | #include <xen/interface/memory.h> | |
ef61ee0d | 4 | #include <xen/features.h> |
4c071ee5 SS |
5 | #include <xen/platform_pci.h> |
6 | #include <asm/xen/hypervisor.h> | |
7 | #include <asm/xen/hypercall.h> | |
8 | #include <linux/module.h> | |
2e01f166 SS |
9 | #include <linux/of.h> |
10 | #include <linux/of_irq.h> | |
11 | #include <linux/of_address.h> | |
4c071ee5 SS |
12 | |
13 | struct start_info _xen_start_info; | |
14 | struct start_info *xen_start_info = &_xen_start_info; | |
15 | EXPORT_SYMBOL_GPL(xen_start_info); | |
16 | ||
17 | enum xen_domain_type xen_domain_type = XEN_NATIVE; | |
18 | EXPORT_SYMBOL_GPL(xen_domain_type); | |
19 | ||
20 | struct shared_info xen_dummy_shared_info; | |
21 | struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info; | |
22 | ||
23 | DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu); | |
24 | ||
25 | /* TODO: to be removed */ | |
26 | __read_mostly int xen_have_vector_callback; | |
27 | EXPORT_SYMBOL_GPL(xen_have_vector_callback); | |
28 | ||
29 | int xen_platform_pci_unplug = XEN_UNPLUG_ALL; | |
30 | EXPORT_SYMBOL_GPL(xen_platform_pci_unplug); | |
31 | ||
32 | int xen_remap_domain_mfn_range(struct vm_area_struct *vma, | |
33 | unsigned long addr, | |
34 | unsigned long mfn, int nr, | |
35 | pgprot_t prot, unsigned domid) | |
36 | { | |
37 | return -ENOSYS; | |
38 | } | |
39 | EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range); | |
2e01f166 SS |
40 | |
41 | /* | |
42 | * see Documentation/devicetree/bindings/arm/xen.txt for the | |
43 | * documentation of the Xen Device Tree format. | |
44 | */ | |
45 | static int __init xen_guest_init(void) | |
46 | { | |
47 | struct xen_add_to_physmap xatp; | |
48 | static struct shared_info *shared_info_page = 0; | |
49 | struct device_node *node; | |
50 | int len; | |
51 | const char *s = NULL; | |
52 | const char *version = NULL; | |
53 | const char *xen_prefix = "xen,xen-"; | |
54 | ||
55 | node = of_find_compatible_node(NULL, NULL, "xen,xen"); | |
56 | if (!node) { | |
57 | pr_debug("No Xen support\n"); | |
58 | return 0; | |
59 | } | |
60 | s = of_get_property(node, "compatible", &len); | |
61 | if (strlen(xen_prefix) + 3 < len && | |
62 | !strncmp(xen_prefix, s, strlen(xen_prefix))) | |
63 | version = s + strlen(xen_prefix); | |
64 | if (version == NULL) { | |
65 | pr_debug("Xen version not found\n"); | |
66 | return 0; | |
67 | } | |
68 | xen_domain_type = XEN_HVM_DOMAIN; | |
69 | ||
ef61ee0d SS |
70 | xen_setup_features(); |
71 | if (xen_feature(XENFEAT_dom0)) | |
72 | xen_start_info->flags |= SIF_INITDOMAIN|SIF_PRIVILEGED; | |
73 | else | |
74 | xen_start_info->flags &= ~(SIF_INITDOMAIN|SIF_PRIVILEGED); | |
75 | ||
2e01f166 SS |
76 | if (!shared_info_page) |
77 | shared_info_page = (struct shared_info *) | |
78 | get_zeroed_page(GFP_KERNEL); | |
79 | if (!shared_info_page) { | |
80 | pr_err("not enough memory\n"); | |
81 | return -ENOMEM; | |
82 | } | |
83 | xatp.domid = DOMID_SELF; | |
84 | xatp.idx = 0; | |
85 | xatp.space = XENMAPSPACE_shared_info; | |
86 | xatp.gpfn = __pa(shared_info_page) >> PAGE_SHIFT; | |
87 | if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp)) | |
88 | BUG(); | |
89 | ||
90 | HYPERVISOR_shared_info = (struct shared_info *)shared_info_page; | |
91 | ||
92 | /* xen_vcpu is a pointer to the vcpu_info struct in the shared_info | |
93 | * page, we use it in the event channel upcall and in some pvclock | |
94 | * related functions. We don't need the vcpu_info placement | |
95 | * optimizations because we don't use any pv_mmu or pv_irq op on | |
96 | * HVM. | |
97 | * The shared info contains exactly 1 CPU (the boot CPU). The guest | |
98 | * is required to use VCPUOP_register_vcpu_info to place vcpu info | |
99 | * for secondary CPUs as they are brought up. */ | |
100 | per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0]; | |
101 | return 0; | |
102 | } | |
103 | core_initcall(xen_guest_init); |