1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef BOOT_COMPRESSED_MISC_H
3 #define BOOT_COMPRESSED_MISC_H
4
5 /*
6 * Special hack: we have to be careful, because no indirections are allowed here,
7 * and paravirt_ops is a kind of one. As it will only run in baremetal anyway,
8 * we just keep it from happening. (This list needs to be extended when new
9 * paravirt and debugging variants are added.)
10 */
11 #undef CONFIG_PARAVIRT
12 #undef CONFIG_PARAVIRT_XXL
13 #undef CONFIG_PARAVIRT_SPINLOCKS
14 #undef CONFIG_KASAN
15 #undef CONFIG_KASAN_GENERIC
16
17 /* cpu_feature_enabled() cannot be used this early */
18 #define USE_EARLY_PGTABLE_L5
19
20 #include <linux/linkage.h>
21 #include <linux/screen_info.h>
22 #include <linux/elf.h>
23 #include <linux/io.h>
24 #include <asm/page.h>
25 #include <asm/boot.h>
26 #include <asm/bootparam.h>
27 #include <asm/desc_defs.h>
28
29 #define BOOT_CTYPE_H
30 #include <linux/acpi.h>
31
32 #define BOOT_BOOT_H
33 #include "../ctype.h"
34
35 #ifdef CONFIG_X86_64
36 #define memptr long
37 #else
38 #define memptr unsigned
39 #endif
40
41 /* boot/compressed/vmlinux start and end markers */
42 extern char _head[], _end[];
43
44 /* misc.c */
45 extern memptr free_mem_ptr;
46 extern memptr free_mem_end_ptr;
47 extern struct boot_params *boot_params;
48 void __putstr(const char *s);
49 void __puthex(unsigned long value);
50 #define error_putstr(__x) __putstr(__x)
51 #define error_puthex(__x) __puthex(__x)
52
53 #ifdef CONFIG_X86_VERBOSE_BOOTUP
54
55 #define debug_putstr(__x) __putstr(__x)
56 #define debug_puthex(__x) __puthex(__x)
57 #define debug_putaddr(__x) { \
58 debug_putstr(#__x ": 0x"); \
59 debug_puthex((unsigned long)(__x)); \
60 debug_putstr("\n"); \
61 }
62
63 #else
64
debug_putstr(const char * s)65 static inline void debug_putstr(const char *s)
66 { }
debug_puthex(unsigned long value)67 static inline void debug_puthex(unsigned long value)
68 { }
69 #define debug_putaddr(x) /* */
70
71 #endif
72
73 /* cmdline.c */
74 int cmdline_find_option(const char *option, char *buffer, int bufsize);
75 int cmdline_find_option_bool(const char *option);
76
77 struct mem_vector {
78 u64 start;
79 u64 size;
80 };
81
82 #ifdef CONFIG_RANDOMIZE_BASE
83 /* kaslr.c */
84 void choose_random_location(unsigned long input,
85 unsigned long input_size,
86 unsigned long *output,
87 unsigned long output_size,
88 unsigned long *virt_addr);
89 #else
choose_random_location(unsigned long input,unsigned long input_size,unsigned long * output,unsigned long output_size,unsigned long * virt_addr)90 static inline void choose_random_location(unsigned long input,
91 unsigned long input_size,
92 unsigned long *output,
93 unsigned long output_size,
94 unsigned long *virt_addr)
95 {
96 }
97 #endif
98
99 /* cpuflags.c */
100 bool has_cpuflag(int flag);
101
102 #ifdef CONFIG_X86_64
103 extern int set_page_decrypted(unsigned long address);
104 extern int set_page_encrypted(unsigned long address);
105 extern int set_page_non_present(unsigned long address);
106 extern unsigned char _pgtable[];
107 #endif
108
109 #ifdef CONFIG_EARLY_PRINTK
110 /* early_serial_console.c */
111 extern int early_serial_base;
112 void console_init(void);
113 #else
114 static const int early_serial_base;
console_init(void)115 static inline void console_init(void)
116 { }
117 #endif
118
119 void set_sev_encryption_mask(void);
120
121 #ifdef CONFIG_AMD_MEM_ENCRYPT
122 void sev_es_shutdown_ghcb(void);
123 extern bool sev_es_check_ghcb_fault(unsigned long address);
124 #else
sev_es_shutdown_ghcb(void)125 static inline void sev_es_shutdown_ghcb(void) { }
sev_es_check_ghcb_fault(unsigned long address)126 static inline bool sev_es_check_ghcb_fault(unsigned long address)
127 {
128 return false;
129 }
130 #endif
131
132 /* acpi.c */
133 #ifdef CONFIG_ACPI
134 acpi_physical_address get_rsdp_addr(void);
135 #else
get_rsdp_addr(void)136 static inline acpi_physical_address get_rsdp_addr(void) { return 0; }
137 #endif
138
139 #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI)
140 extern struct mem_vector immovable_mem[MAX_NUMNODES*2];
141 int count_immovable_mem_regions(void);
142 #else
count_immovable_mem_regions(void)143 static inline int count_immovable_mem_regions(void) { return 0; }
144 #endif
145
146 /* ident_map_64.c */
147 #ifdef CONFIG_X86_5LEVEL
148 extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d;
149 #endif
150
151 /* Used by PAGE_KERN* macros: */
152 extern pteval_t __default_kernel_pte_mask;
153
154 /* idt_64.c */
155 extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
156 extern struct desc_ptr boot_idt_desc;
157
158 #ifdef CONFIG_X86_64
159 void cleanup_exception_handling(void);
160 #else
cleanup_exception_handling(void)161 static inline void cleanup_exception_handling(void) { }
162 #endif
163
164 /* IDT Entry Points */
165 void boot_page_fault(void);
166 void boot_nmi_trap(void);
167 void boot_stage1_vc(void);
168 void boot_stage2_vc(void);
169
170 unsigned long sev_verify_cbit(unsigned long cr3);
171
172 #endif /* BOOT_COMPRESSED_MISC_H */
173