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 /* cpu_feature_enabled() cannot be used this early */ 18 #define USE_EARLY_PGTABLE_L5 19 20 #include <linux/linkage.h> 21 #include <linux/screen_info.h> 22 #include <linux/elf.h> 23 #include <linux/io.h> 24 #include <asm/page.h> 25 #include <asm/boot.h> 26 #include <asm/bootparam.h> 27 #include <asm/desc_defs.h> 28 29 #define BOOT_CTYPE_H 30 #include <linux/acpi.h> 31 32 #define BOOT_BOOT_H 33 #include "../ctype.h" 34 35 #ifdef CONFIG_X86_64 36 #define memptr long 37 #else 38 #define memptr unsigned 39 #endif 40 41 /* boot/compressed/vmlinux start and end markers */ 42 extern char _head[], _end[]; 43 44 /* misc.c */ 45 extern memptr free_mem_ptr; 46 extern memptr free_mem_end_ptr; 47 extern struct boot_params *boot_params; 48 void __putstr(const char *s); 49 void __puthex(unsigned long value); 50 #define error_putstr(__x) __putstr(__x) 51 #define error_puthex(__x) __puthex(__x) 52 53 #ifdef CONFIG_X86_VERBOSE_BOOTUP 54 55 #define debug_putstr(__x) __putstr(__x) 56 #define debug_puthex(__x) __puthex(__x) 57 #define debug_putaddr(__x) { \ 58 debug_putstr(#__x ": 0x"); \ 59 debug_puthex((unsigned long)(__x)); \ 60 debug_putstr("\n"); \ 61 } 62 63 #else 64 65 static inline void debug_putstr(const char *s) 66 { } 67 static inline void debug_puthex(unsigned long value) 68 { } 69 #define debug_putaddr(x) /* */ 70 71 #endif 72 73 /* cmdline.c */ 74 int cmdline_find_option(const char *option, char *buffer, int bufsize); 75 int cmdline_find_option_bool(const char *option); 76 77 struct mem_vector { 78 u64 start; 79 u64 size; 80 }; 81 82 #ifdef CONFIG_RANDOMIZE_BASE 83 /* kaslr.c */ 84 void choose_random_location(unsigned long input, 85 unsigned long input_size, 86 unsigned long *output, 87 unsigned long output_size, 88 unsigned long *virt_addr); 89 #else 90 static inline void choose_random_location(unsigned long input, 91 unsigned long input_size, 92 unsigned long *output, 93 unsigned long output_size, 94 unsigned long *virt_addr) 95 { 96 } 97 #endif 98 99 /* cpuflags.c */ 100 bool has_cpuflag(int flag); 101 102 #ifdef CONFIG_X86_64 103 extern int set_page_decrypted(unsigned long address); 104 extern int set_page_encrypted(unsigned long address); 105 extern int set_page_non_present(unsigned long address); 106 extern unsigned char _pgtable[]; 107 #endif 108 109 #ifdef CONFIG_EARLY_PRINTK 110 /* early_serial_console.c */ 111 extern int early_serial_base; 112 void console_init(void); 113 #else 114 static const int early_serial_base; 115 static inline void console_init(void) 116 { } 117 #endif 118 119 void set_sev_encryption_mask(void); 120 121 #ifdef CONFIG_AMD_MEM_ENCRYPT 122 void sev_es_shutdown_ghcb(void); 123 extern bool sev_es_check_ghcb_fault(unsigned long address); 124 #else 125 static inline void sev_es_shutdown_ghcb(void) { } 126 static inline bool sev_es_check_ghcb_fault(unsigned long address) 127 { 128 return false; 129 } 130 #endif 131 132 /* acpi.c */ 133 #ifdef CONFIG_ACPI 134 acpi_physical_address get_rsdp_addr(void); 135 #else 136 static inline acpi_physical_address get_rsdp_addr(void) { return 0; } 137 #endif 138 139 #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI) 140 extern struct mem_vector immovable_mem[MAX_NUMNODES*2]; 141 int count_immovable_mem_regions(void); 142 #else 143 static inline int count_immovable_mem_regions(void) { return 0; } 144 #endif 145 146 /* ident_map_64.c */ 147 #ifdef CONFIG_X86_5LEVEL 148 extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d; 149 #endif 150 151 /* Used by PAGE_KERN* macros: */ 152 extern pteval_t __default_kernel_pte_mask; 153 154 /* idt_64.c */ 155 extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; 156 extern struct desc_ptr boot_idt_desc; 157 158 #ifdef CONFIG_X86_64 159 void cleanup_exception_handling(void); 160 #else 161 static inline void cleanup_exception_handling(void) { } 162 #endif 163 164 /* IDT Entry Points */ 165 void boot_page_fault(void); 166 void boot_stage1_vc(void); 167 void boot_stage2_vc(void); 168 169 unsigned long sev_verify_cbit(unsigned long cr3); 170 171 #endif /* BOOT_COMPRESSED_MISC_H */ 172