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