This source file includes following definitions.
- pvh_get_root_pointer
- mem_map_via_hcall
- init_pvh_bootparams
- xen_pvh_init
- hypervisor_specific_init
- xen_prepare_pvh
1
2 #include <linux/acpi.h>
3
4 #include <xen/hvc-console.h>
5
6 #include <asm/io_apic.h>
7 #include <asm/hypervisor.h>
8 #include <asm/e820/api.h>
9 #include <asm/x86_init.h>
10
11 #include <asm/xen/interface.h>
12
13 #include <xen/xen.h>
14 #include <xen/interface/hvm/start_info.h>
15
16
17
18
19
20
21
22 struct boot_params pvh_bootparams __attribute__((section(".data")));
23 struct hvm_start_info pvh_start_info __attribute__((section(".data")));
24
25 unsigned int pvh_start_info_sz = sizeof(pvh_start_info);
26
27 static u64 pvh_get_root_pointer(void)
28 {
29 return pvh_start_info.rsdp_paddr;
30 }
31
32
33
34
35
36
37
38
39 void __init __weak mem_map_via_hcall(struct boot_params *ptr __maybe_unused)
40 {
41 xen_raw_printk("Error: Could not find memory map\n");
42 BUG();
43 }
44
45 static void __init init_pvh_bootparams(bool xen_guest)
46 {
47 if ((pvh_start_info.version > 0) && (pvh_start_info.memmap_entries)) {
48 struct hvm_memmap_table_entry *ep;
49 int i;
50
51 ep = __va(pvh_start_info.memmap_paddr);
52 pvh_bootparams.e820_entries = pvh_start_info.memmap_entries;
53
54 for (i = 0; i < pvh_bootparams.e820_entries ; i++, ep++) {
55 pvh_bootparams.e820_table[i].addr = ep->addr;
56 pvh_bootparams.e820_table[i].size = ep->size;
57 pvh_bootparams.e820_table[i].type = ep->type;
58 }
59 } else if (xen_guest) {
60 mem_map_via_hcall(&pvh_bootparams);
61 } else {
62
63 BUG();
64 }
65
66 if (pvh_bootparams.e820_entries < E820_MAX_ENTRIES_ZEROPAGE - 1) {
67 pvh_bootparams.e820_table[pvh_bootparams.e820_entries].addr =
68 ISA_START_ADDRESS;
69 pvh_bootparams.e820_table[pvh_bootparams.e820_entries].size =
70 ISA_END_ADDRESS - ISA_START_ADDRESS;
71 pvh_bootparams.e820_table[pvh_bootparams.e820_entries].type =
72 E820_TYPE_RESERVED;
73 pvh_bootparams.e820_entries++;
74 } else
75 xen_raw_printk("Warning: Can fit ISA range into e820\n");
76
77 pvh_bootparams.hdr.cmd_line_ptr =
78 pvh_start_info.cmdline_paddr;
79
80
81 if (pvh_start_info.nr_modules) {
82 struct hvm_modlist_entry *modaddr =
83 __va(pvh_start_info.modlist_paddr);
84 pvh_bootparams.hdr.ramdisk_image = modaddr->paddr;
85 pvh_bootparams.hdr.ramdisk_size = modaddr->size;
86 }
87
88
89
90
91
92
93
94 pvh_bootparams.hdr.version = (2 << 8) | 12;
95 pvh_bootparams.hdr.type_of_loader = ((xen_guest ? 0x9 : 0xb) << 4) | 0;
96
97 x86_init.acpi.get_root_pointer = pvh_get_root_pointer;
98 }
99
100
101
102
103
104 void __init __weak xen_pvh_init(struct boot_params *boot_params)
105 {
106 xen_raw_printk("Error: Missing xen PVH initialization\n");
107 BUG();
108 }
109
110 static void hypervisor_specific_init(bool xen_guest)
111 {
112 if (xen_guest)
113 xen_pvh_init(&pvh_bootparams);
114 }
115
116
117
118
119
120 void __init xen_prepare_pvh(void)
121 {
122
123 u32 msr = xen_cpuid_base();
124 bool xen_guest = !!msr;
125
126 if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) {
127 xen_raw_printk("Error: Unexpected magic value (0x%08x)\n",
128 pvh_start_info.magic);
129 BUG();
130 }
131
132 memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
133
134 hypervisor_specific_init(xen_guest);
135
136 init_pvh_bootparams(xen_guest);
137 }