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