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 #include <linux/linkage.h> 23 #include <linux/screen_info.h> 24 #include <linux/elf.h> 25 #include <linux/io.h> 26 #include <asm/page.h> 27 #include <asm/boot.h> 28 #include <asm/bootparam.h> 29 #include <asm/desc_defs.h> 30 31 #define BOOT_CTYPE_H 32 #include <linux/acpi.h> 33 34 #define BOOT_BOOT_H 35 #include "../ctype.h" 36 37 #ifdef CONFIG_X86_64 38 #define memptr long 39 #else 40 #define memptr unsigned 41 #endif 42 43 /* boot/compressed/vmlinux start and end markers */ 44 extern char _head[], _end[]; 45 46 /* misc.c */ 47 extern memptr free_mem_ptr; 48 extern memptr free_mem_end_ptr; 49 extern struct boot_params *boot_params; 50 void __putstr(const char *s); 51 void __puthex(unsigned long value); 52 #define error_putstr(__x) __putstr(__x) 53 #define error_puthex(__x) __puthex(__x) 54 55 #ifdef CONFIG_X86_VERBOSE_BOOTUP 56 57 #define debug_putstr(__x) __putstr(__x) 58 #define debug_puthex(__x) __puthex(__x) 59 #define debug_putaddr(__x) { \ 60 debug_putstr(#__x ": 0x"); \ 61 debug_puthex((unsigned long)(__x)); \ 62 debug_putstr("\n"); \ 63 } 64 65 #else 66 67 static inline void debug_putstr(const char *s) 68 { } 69 static inline void debug_puthex(unsigned long value) 70 { } 71 #define debug_putaddr(x) /* */ 72 73 #endif 74 75 /* cmdline.c */ 76 int cmdline_find_option(const char *option, char *buffer, int bufsize); 77 int cmdline_find_option_bool(const char *option); 78 79 struct mem_vector { 80 u64 start; 81 u64 size; 82 }; 83 84 #ifdef CONFIG_RANDOMIZE_BASE 85 /* kaslr.c */ 86 void choose_random_location(unsigned long input, 87 unsigned long input_size, 88 unsigned long *output, 89 unsigned long output_size, 90 unsigned long *virt_addr); 91 #else 92 static inline void choose_random_location(unsigned long input, 93 unsigned long input_size, 94 unsigned long *output, 95 unsigned long output_size, 96 unsigned long *virt_addr) 97 { 98 } 99 #endif 100 101 /* cpuflags.c */ 102 bool has_cpuflag(int flag); 103 104 #ifdef CONFIG_X86_64 105 extern int set_page_decrypted(unsigned long address); 106 extern int set_page_encrypted(unsigned long address); 107 extern int set_page_non_present(unsigned long address); 108 extern unsigned char _pgtable[]; 109 #endif 110 111 #ifdef CONFIG_EARLY_PRINTK 112 /* early_serial_console.c */ 113 extern int early_serial_base; 114 void console_init(void); 115 #else 116 static const int early_serial_base; 117 static inline void console_init(void) 118 { } 119 #endif 120 121 void set_sev_encryption_mask(void); 122 123 #ifdef CONFIG_AMD_MEM_ENCRYPT 124 void sev_es_shutdown_ghcb(void); 125 extern bool sev_es_check_ghcb_fault(unsigned long address); 126 #else 127 static inline void sev_es_shutdown_ghcb(void) { } 128 static inline bool sev_es_check_ghcb_fault(unsigned long address) 129 { 130 return false; 131 } 132 #endif 133 134 /* acpi.c */ 135 #ifdef CONFIG_ACPI 136 acpi_physical_address get_rsdp_addr(void); 137 #else 138 static inline acpi_physical_address get_rsdp_addr(void) { return 0; } 139 #endif 140 141 #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI) 142 extern struct mem_vector immovable_mem[MAX_NUMNODES*2]; 143 int count_immovable_mem_regions(void); 144 #else 145 static inline int count_immovable_mem_regions(void) { return 0; } 146 #endif 147 148 /* ident_map_64.c */ 149 #ifdef CONFIG_X86_5LEVEL 150 extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d; 151 #endif 152 153 /* Used by PAGE_KERN* macros: */ 154 extern pteval_t __default_kernel_pte_mask; 155 156 /* idt_64.c */ 157 extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; 158 extern struct desc_ptr boot_idt_desc; 159 160 #ifdef CONFIG_X86_64 161 void cleanup_exception_handling(void); 162 #else 163 static inline void cleanup_exception_handling(void) { } 164 #endif 165 166 /* IDT Entry Points */ 167 void boot_page_fault(void); 168 void boot_stage1_vc(void); 169 void boot_stage2_vc(void); 170 171 unsigned long sev_verify_cbit(unsigned long cr3); 172 173 #endif /* BOOT_COMPRESSED_MISC_H */ 174