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 | #define __NO_FORTIFY |
18 | |
19 | /* cpu_feature_enabled() cannot be used this early */ |
20 | #define USE_EARLY_PGTABLE_L5 |
21 | |
22 | /* |
23 | * Boot stub deals with identity mappings, physical and virtual addresses are |
24 | * the same, so override these defines. |
25 | * |
26 | * <asm/page.h> will not define them if they are already defined. |
27 | */ |
28 | #define __pa(x) ((unsigned long)(x)) |
29 | #define __va(x) ((void *)((unsigned long)(x))) |
30 | |
31 | #include <linux/linkage.h> |
32 | #include <linux/screen_info.h> |
33 | #include <linux/elf.h> |
34 | #include <asm/page.h> |
35 | #include <asm/boot.h> |
36 | #include <asm/bootparam.h> |
37 | #include <asm/desc_defs.h> |
38 | |
39 | #include "tdx.h" |
40 | |
41 | #define BOOT_CTYPE_H |
42 | #include <linux/acpi.h> |
43 | |
44 | #define BOOT_BOOT_H |
45 | #include "../ctype.h" |
46 | #include "../io.h" |
47 | |
48 | #include "efi.h" |
49 | |
50 | #ifdef CONFIG_X86_64 |
51 | #define memptr long |
52 | #else |
53 | #define memptr unsigned |
54 | #endif |
55 | |
56 | /* boot/compressed/vmlinux start and end markers */ |
57 | extern char _head[], _end[]; |
58 | |
59 | /* misc.c */ |
60 | extern memptr free_mem_ptr; |
61 | extern memptr free_mem_end_ptr; |
62 | void *malloc(int size); |
63 | void free(void *where); |
64 | void __putstr(const char *s); |
65 | void __puthex(unsigned long value); |
66 | #define error_putstr(__x) __putstr(__x) |
67 | #define error_puthex(__x) __puthex(__x) |
68 | |
69 | #ifdef CONFIG_X86_VERBOSE_BOOTUP |
70 | |
71 | #define debug_putstr(__x) __putstr(__x) |
72 | #define debug_puthex(__x) __puthex(__x) |
73 | #define debug_putaddr(__x) { \ |
74 | debug_putstr(#__x ": 0x"); \ |
75 | debug_puthex((unsigned long)(__x)); \ |
76 | debug_putstr("\n"); \ |
77 | } |
78 | |
79 | #else |
80 | |
81 | static inline void debug_putstr(const char *s) |
82 | { } |
83 | static inline void debug_puthex(unsigned long value) |
84 | { } |
85 | #define debug_putaddr(x) /* */ |
86 | |
87 | #endif |
88 | |
89 | /* cmdline.c */ |
90 | int cmdline_find_option(const char *option, char *buffer, int bufsize); |
91 | int cmdline_find_option_bool(const char *option); |
92 | |
93 | struct mem_vector { |
94 | u64 start; |
95 | u64 size; |
96 | }; |
97 | |
98 | #ifdef CONFIG_RANDOMIZE_BASE |
99 | /* kaslr.c */ |
100 | void choose_random_location(unsigned long input, |
101 | unsigned long input_size, |
102 | unsigned long *output, |
103 | unsigned long output_size, |
104 | unsigned long *virt_addr); |
105 | #else |
106 | static inline void choose_random_location(unsigned long input, |
107 | unsigned long input_size, |
108 | unsigned long *output, |
109 | unsigned long output_size, |
110 | unsigned long *virt_addr) |
111 | { |
112 | } |
113 | #endif |
114 | |
115 | /* cpuflags.c */ |
116 | bool has_cpuflag(int flag); |
117 | |
118 | #ifdef CONFIG_X86_64 |
119 | extern int set_page_decrypted(unsigned long address); |
120 | extern int set_page_encrypted(unsigned long address); |
121 | extern int set_page_non_present(unsigned long address); |
122 | extern unsigned char _pgtable[]; |
123 | #endif |
124 | |
125 | #ifdef CONFIG_EARLY_PRINTK |
126 | /* early_serial_console.c */ |
127 | extern int early_serial_base; |
128 | void console_init(void); |
129 | #else |
130 | static const int early_serial_base; |
131 | static inline void console_init(void) |
132 | { } |
133 | #endif |
134 | |
135 | #ifdef CONFIG_AMD_MEM_ENCRYPT |
136 | void sev_enable(struct boot_params *bp); |
137 | void snp_check_features(void); |
138 | void sev_es_shutdown_ghcb(void); |
139 | extern bool sev_es_check_ghcb_fault(unsigned long address); |
140 | void snp_set_page_private(unsigned long paddr); |
141 | void snp_set_page_shared(unsigned long paddr); |
142 | void sev_prep_identity_maps(unsigned long top_level_pgt); |
143 | #else |
144 | static inline void sev_enable(struct boot_params *bp) |
145 | { |
146 | /* |
147 | * bp->cc_blob_address should only be set by boot/compressed kernel. |
148 | * Initialize it to 0 unconditionally (thus here in this stub too) to |
149 | * ensure that uninitialized values from buggy bootloaders aren't |
150 | * propagated. |
151 | */ |
152 | if (bp) |
153 | bp->cc_blob_address = 0; |
154 | } |
155 | static inline void snp_check_features(void) { } |
156 | static inline void sev_es_shutdown_ghcb(void) { } |
157 | static inline bool sev_es_check_ghcb_fault(unsigned long address) |
158 | { |
159 | return false; |
160 | } |
161 | static inline void snp_set_page_private(unsigned long paddr) { } |
162 | static inline void snp_set_page_shared(unsigned long paddr) { } |
163 | static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { } |
164 | #endif |
165 | |
166 | /* acpi.c */ |
167 | #ifdef CONFIG_ACPI |
168 | acpi_physical_address get_rsdp_addr(void); |
169 | #else |
170 | static inline acpi_physical_address get_rsdp_addr(void) { return 0; } |
171 | #endif |
172 | |
173 | #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI) |
174 | extern struct mem_vector immovable_mem[MAX_NUMNODES*2]; |
175 | int count_immovable_mem_regions(void); |
176 | #else |
177 | static inline int count_immovable_mem_regions(void) { return 0; } |
178 | #endif |
179 | |
180 | /* ident_map_64.c */ |
181 | extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d; |
182 | extern void kernel_add_identity_map(unsigned long start, unsigned long end); |
183 | |
184 | /* Used by PAGE_KERN* macros: */ |
185 | extern pteval_t __default_kernel_pte_mask; |
186 | |
187 | /* idt_64.c */ |
188 | extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; |
189 | extern struct desc_ptr boot_idt_desc; |
190 | |
191 | #ifdef CONFIG_X86_64 |
192 | void cleanup_exception_handling(void); |
193 | #else |
194 | static inline void cleanup_exception_handling(void) { } |
195 | #endif |
196 | |
197 | /* IDT Entry Points */ |
198 | void boot_page_fault(void); |
199 | void boot_stage1_vc(void); |
200 | void boot_stage2_vc(void); |
201 | |
202 | unsigned long sev_verify_cbit(unsigned long cr3); |
203 | |
204 | enum efi_type { |
205 | EFI_TYPE_64, |
206 | EFI_TYPE_32, |
207 | EFI_TYPE_NONE, |
208 | }; |
209 | |
210 | #ifdef CONFIG_EFI |
211 | /* helpers for early EFI config table access */ |
212 | enum efi_type efi_get_type(struct boot_params *bp); |
213 | unsigned long efi_get_system_table(struct boot_params *bp); |
214 | int efi_get_conf_table(struct boot_params *bp, unsigned long *cfg_tbl_pa, |
215 | unsigned int *cfg_tbl_len); |
216 | unsigned long efi_find_vendor_table(struct boot_params *bp, |
217 | unsigned long cfg_tbl_pa, |
218 | unsigned int cfg_tbl_len, |
219 | efi_guid_t guid); |
220 | #else |
221 | static inline enum efi_type efi_get_type(struct boot_params *bp) |
222 | { |
223 | return EFI_TYPE_NONE; |
224 | } |
225 | |
226 | static inline unsigned long efi_get_system_table(struct boot_params *bp) |
227 | { |
228 | return 0; |
229 | } |
230 | |
231 | static inline int efi_get_conf_table(struct boot_params *bp, |
232 | unsigned long *cfg_tbl_pa, |
233 | unsigned int *cfg_tbl_len) |
234 | { |
235 | return -ENOENT; |
236 | } |
237 | |
238 | static inline unsigned long efi_find_vendor_table(struct boot_params *bp, |
239 | unsigned long cfg_tbl_pa, |
240 | unsigned int cfg_tbl_len, |
241 | efi_guid_t guid) |
242 | { |
243 | return 0; |
244 | } |
245 | #endif /* CONFIG_EFI */ |
246 | |
247 | #ifdef CONFIG_UNACCEPTED_MEMORY |
248 | bool init_unaccepted_memory(void); |
249 | #else |
250 | static inline bool init_unaccepted_memory(void) { return false; } |
251 | #endif |
252 | |
253 | /* Defined in EFI stub */ |
254 | extern struct efi_unaccepted_memory *unaccepted_table; |
255 | void accept_memory(phys_addr_t start, phys_addr_t end); |
256 | |
257 | #endif /* BOOT_COMPRESSED_MISC_H */ |
258 | |