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