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 | extern int spurious_nmi_count; |
63 | void *malloc(int size); |
64 | void free(void *where); |
65 | void __putstr(const char *s); |
66 | void __puthex(unsigned long value); |
67 | void __putdec(unsigned long value); |
68 | #define error_putstr(__x) __putstr(__x) |
69 | #define error_puthex(__x) __puthex(__x) |
70 | #define error_putdec(__x) __putdec(__x) |
71 | |
72 | #ifdef CONFIG_X86_VERBOSE_BOOTUP |
73 | |
74 | #define debug_putstr(__x) __putstr(__x) |
75 | #define debug_puthex(__x) __puthex(__x) |
76 | #define debug_putaddr(__x) { \ |
77 | debug_putstr(#__x ": 0x"); \ |
78 | debug_puthex((unsigned long)(__x)); \ |
79 | debug_putstr("\n"); \ |
80 | } |
81 | |
82 | #else |
83 | |
84 | static inline void debug_putstr(const char *s) |
85 | { } |
86 | static inline void debug_puthex(unsigned long value) |
87 | { } |
88 | #define debug_putaddr(x) /* */ |
89 | |
90 | #endif |
91 | |
92 | /* cmdline.c */ |
93 | int cmdline_find_option(const char *option, char *buffer, int bufsize); |
94 | int cmdline_find_option_bool(const char *option); |
95 | |
96 | struct mem_vector { |
97 | u64 start; |
98 | u64 size; |
99 | }; |
100 | |
101 | #ifdef CONFIG_RANDOMIZE_BASE |
102 | /* kaslr.c */ |
103 | void choose_random_location(unsigned long input, |
104 | unsigned long input_size, |
105 | unsigned long *output, |
106 | unsigned long output_size, |
107 | unsigned long *virt_addr); |
108 | #else |
109 | static inline void choose_random_location(unsigned long input, |
110 | unsigned long input_size, |
111 | unsigned long *output, |
112 | unsigned long output_size, |
113 | unsigned long *virt_addr) |
114 | { |
115 | } |
116 | #endif |
117 | |
118 | /* cpuflags.c */ |
119 | bool has_cpuflag(int flag); |
120 | |
121 | #ifdef CONFIG_X86_64 |
122 | extern int set_page_decrypted(unsigned long address); |
123 | extern int set_page_encrypted(unsigned long address); |
124 | extern int set_page_non_present(unsigned long address); |
125 | extern unsigned char _pgtable[]; |
126 | #endif |
127 | |
128 | #ifdef CONFIG_EARLY_PRINTK |
129 | /* early_serial_console.c */ |
130 | extern int early_serial_base; |
131 | void console_init(void); |
132 | #else |
133 | static const int early_serial_base; |
134 | static inline void console_init(void) |
135 | { } |
136 | #endif |
137 | |
138 | #ifdef CONFIG_AMD_MEM_ENCRYPT |
139 | void sev_enable(struct boot_params *bp); |
140 | void snp_check_features(void); |
141 | void sev_es_shutdown_ghcb(void); |
142 | extern bool sev_es_check_ghcb_fault(unsigned long address); |
143 | void snp_set_page_private(unsigned long paddr); |
144 | void snp_set_page_shared(unsigned long paddr); |
145 | void sev_prep_identity_maps(unsigned long top_level_pgt); |
146 | #else |
147 | static inline void sev_enable(struct boot_params *bp) |
148 | { |
149 | /* |
150 | * bp->cc_blob_address should only be set by boot/compressed kernel. |
151 | * Initialize it to 0 unconditionally (thus here in this stub too) to |
152 | * ensure that uninitialized values from buggy bootloaders aren't |
153 | * propagated. |
154 | */ |
155 | if (bp) |
156 | bp->cc_blob_address = 0; |
157 | } |
158 | static inline void snp_check_features(void) { } |
159 | static inline void sev_es_shutdown_ghcb(void) { } |
160 | static inline bool sev_es_check_ghcb_fault(unsigned long address) |
161 | { |
162 | return false; |
163 | } |
164 | static inline void snp_set_page_private(unsigned long paddr) { } |
165 | static inline void snp_set_page_shared(unsigned long paddr) { } |
166 | static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { } |
167 | #endif |
168 | |
169 | /* acpi.c */ |
170 | #ifdef CONFIG_ACPI |
171 | acpi_physical_address get_rsdp_addr(void); |
172 | #else |
173 | static inline acpi_physical_address get_rsdp_addr(void) { return 0; } |
174 | #endif |
175 | |
176 | #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI) |
177 | extern struct mem_vector immovable_mem[MAX_NUMNODES*2]; |
178 | int count_immovable_mem_regions(void); |
179 | #else |
180 | static inline int count_immovable_mem_regions(void) { return 0; } |
181 | #endif |
182 | |
183 | /* ident_map_64.c */ |
184 | extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d; |
185 | extern void kernel_add_identity_map(unsigned long start, unsigned long end); |
186 | |
187 | /* Used by PAGE_KERN* macros: */ |
188 | extern pteval_t __default_kernel_pte_mask; |
189 | |
190 | /* idt_64.c */ |
191 | extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; |
192 | extern struct desc_ptr boot_idt_desc; |
193 | |
194 | #ifdef CONFIG_X86_64 |
195 | void cleanup_exception_handling(void); |
196 | #else |
197 | static inline void cleanup_exception_handling(void) { } |
198 | #endif |
199 | |
200 | /* IDT Entry Points */ |
201 | void boot_page_fault(void); |
202 | void boot_nmi_trap(void); |
203 | void boot_stage1_vc(void); |
204 | void boot_stage2_vc(void); |
205 | |
206 | unsigned long sev_verify_cbit(unsigned long cr3); |
207 | |
208 | enum efi_type { |
209 | EFI_TYPE_64, |
210 | EFI_TYPE_32, |
211 | EFI_TYPE_NONE, |
212 | }; |
213 | |
214 | #ifdef CONFIG_EFI |
215 | /* helpers for early EFI config table access */ |
216 | enum efi_type efi_get_type(struct boot_params *bp); |
217 | unsigned long efi_get_system_table(struct boot_params *bp); |
218 | int efi_get_conf_table(struct boot_params *bp, unsigned long *cfg_tbl_pa, |
219 | unsigned int *cfg_tbl_len); |
220 | unsigned long efi_find_vendor_table(struct boot_params *bp, |
221 | unsigned long cfg_tbl_pa, |
222 | unsigned int cfg_tbl_len, |
223 | efi_guid_t guid); |
224 | #else |
225 | static inline enum efi_type efi_get_type(struct boot_params *bp) |
226 | { |
227 | return EFI_TYPE_NONE; |
228 | } |
229 | |
230 | static inline unsigned long efi_get_system_table(struct boot_params *bp) |
231 | { |
232 | return 0; |
233 | } |
234 | |
235 | static inline int efi_get_conf_table(struct boot_params *bp, |
236 | unsigned long *cfg_tbl_pa, |
237 | unsigned int *cfg_tbl_len) |
238 | { |
239 | return -ENOENT; |
240 | } |
241 | |
242 | static inline unsigned long efi_find_vendor_table(struct boot_params *bp, |
243 | unsigned long cfg_tbl_pa, |
244 | unsigned int cfg_tbl_len, |
245 | efi_guid_t guid) |
246 | { |
247 | return 0; |
248 | } |
249 | #endif /* CONFIG_EFI */ |
250 | |
251 | #ifdef CONFIG_UNACCEPTED_MEMORY |
252 | bool init_unaccepted_memory(void); |
253 | #else |
254 | static inline bool init_unaccepted_memory(void) { return false; } |
255 | #endif |
256 | |
257 | /* Defined in EFI stub */ |
258 | extern struct efi_unaccepted_memory *unaccepted_table; |
259 | void accept_memory(phys_addr_t start, phys_addr_t end); |
260 | |
261 | #endif /* BOOT_COMPRESSED_MISC_H */ |
262 | |