arch/x86/boot/compressed/misc.h

   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 #if 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 /* IDT Entry Points */
 159 void boot_page_fault(void);
 160 void boot_stage1_vc(void);
 161 void boot_stage2_vc(void);
 162
 163 unsigned long sev_verify_cbit(unsigned long cr3);
 164
 165 #endif /* BOOT_COMPRESSED_MISC_H */