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_ARCH_HAS_LAZY_MMU_MODE 15 #undef CONFIG_KASAN 16 #undef CONFIG_KASAN_GENERIC 17 18 #define __NO_FORTIFY 19 20 /* cpu_feature_enabled() cannot be used this early */ 21 #define USE_EARLY_PGTABLE_L5 22 23 /* 24 * Boot stub deals with identity mappings, physical and virtual addresses are 25 * the same, so override these defines. 26 * 27 * <asm/page.h> will not define them if they are already defined. 28 */ 29 #define __pa(x) ((unsigned long)(x)) 30 #define __va(x) ((void *)((unsigned long)(x))) 31 32 #include <linux/linkage.h> 33 #include <linux/screen_info.h> 34 #include <linux/elf.h> 35 #include <asm/page.h> 36 #include <asm/boot.h> 37 #include <asm/bootparam.h> 38 #include <asm/desc_defs.h> 39 40 #include "tdx.h" 41 42 #define BOOT_CTYPE_H 43 #include <linux/acpi.h> 44 45 #define BOOT_BOOT_H 46 #include "../ctype.h" 47 #include "../io.h" 48 49 #include "efi.h" 50 51 #ifdef CONFIG_X86_64 52 #define memptr long 53 #else 54 #define memptr unsigned 55 #endif 56 57 /* boot/compressed/vmlinux start and end markers */ 58 extern char _head[], _end[]; 59 60 /* misc.c */ 61 extern memptr free_mem_ptr; 62 extern memptr free_mem_end_ptr; 63 extern int spurious_nmi_count; 64 void *malloc(int size); 65 void free(void *where); 66 void __putstr(const char *s); 67 void __puthex(unsigned long value); 68 void __putdec(unsigned long value); 69 #define error_putstr(__x) __putstr(__x) 70 #define error_puthex(__x) __puthex(__x) 71 #define error_putdec(__x) __putdec(__x) 72 73 #ifdef CONFIG_X86_VERBOSE_BOOTUP 74 75 #define debug_putstr(__x) __putstr(__x) 76 #define debug_puthex(__x) __puthex(__x) 77 #define debug_putaddr(__x) { \ 78 debug_putstr(#__x ": 0x"); \ 79 debug_puthex((unsigned long)(__x)); \ 80 debug_putstr("\n"); \ 81 } 82 83 #else 84 85 static inline void debug_putstr(const char *s) 86 { } 87 static inline void debug_puthex(unsigned long value) 88 { } 89 #define debug_putaddr(x) /* */ 90 91 #endif 92 93 /* cmdline.c */ 94 int cmdline_find_option(const char *option, char *buffer, int bufsize); 95 int cmdline_find_option_bool(const char *option); 96 97 struct mem_vector { 98 u64 start; 99 u64 size; 100 }; 101 102 #ifdef CONFIG_RANDOMIZE_BASE 103 /* kaslr.c */ 104 void choose_random_location(unsigned long input, 105 unsigned long input_size, 106 unsigned long *output, 107 unsigned long output_size, 108 unsigned long *virt_addr); 109 #else 110 static inline void choose_random_location(unsigned long input, 111 unsigned long input_size, 112 unsigned long *output, 113 unsigned long output_size, 114 unsigned long *virt_addr) 115 { 116 } 117 #endif 118 119 /* cpuflags.c */ 120 bool has_cpuflag(int flag); 121 122 #ifdef CONFIG_X86_64 123 extern int set_page_decrypted(unsigned long address); 124 extern int set_page_encrypted(unsigned long address); 125 extern int set_page_non_present(unsigned long address); 126 extern unsigned char _pgtable[]; 127 #endif 128 129 #ifdef CONFIG_EARLY_PRINTK 130 /* early_serial_console.c */ 131 extern int early_serial_base; 132 void console_init(void); 133 #else 134 static const int early_serial_base; 135 static inline void console_init(void) 136 { } 137 #endif 138 139 #ifdef CONFIG_AMD_MEM_ENCRYPT 140 struct es_em_ctxt; 141 struct insn; 142 143 void sev_enable(struct boot_params *bp); 144 void snp_check_features(void); 145 void sev_es_shutdown_ghcb(void); 146 extern bool sev_es_check_ghcb_fault(unsigned long address); 147 void snp_set_page_private(unsigned long paddr); 148 void snp_set_page_shared(unsigned long paddr); 149 void sev_prep_identity_maps(unsigned long top_level_pgt); 150 151 enum es_result vc_decode_insn(struct es_em_ctxt *ctxt); 152 bool insn_has_rep_prefix(struct insn *insn); 153 void sev_insn_decode_init(void); 154 bool early_setup_ghcb(void); 155 #else 156 static inline void snp_check_features(void) { } 157 static inline void sev_es_shutdown_ghcb(void) { } 158 static inline bool sev_es_check_ghcb_fault(unsigned long address) 159 { 160 return false; 161 } 162 static inline void snp_set_page_private(unsigned long paddr) { } 163 static inline void snp_set_page_shared(unsigned long paddr) { } 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 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 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 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 223 static inline enum efi_type efi_get_type(struct boot_params *bp) 224 { 225 return EFI_TYPE_NONE; 226 } 227 228 static inline unsigned long efi_get_system_table(struct boot_params *bp) 229 { 230 return 0; 231 } 232 233 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 } 239 240 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 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, unsigned long size); 258 259 #endif /* BOOT_COMPRESSED_MISC_H */ 260