LXR linux/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 */
  42extern char _head[], _end[];
  43
  44/* misc.c */
  45extern memptr free_mem_ptr;
  46extern memptr free_mem_end_ptr;
  47extern struct boot_params *boot_params;
  48void __putstr(const char *s);
  49void __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
  65static inline void debug_putstr(const char *s)
  66{ }
  67static inline void debug_puthex(unsigned long value)
  68{ }
  69#define debug_putaddr(x) /* */
  70
  71#endif
  72
  73/* cmdline.c */
  74int cmdline_find_option(const char *option, char *buffer, int bufsize);
  75int cmdline_find_option_bool(const char *option);
  76
  77struct mem_vector {
  78        u64 start;
  79        u64 size;
  80};
  81
  82#ifdef CONFIG_RANDOMIZE_BASE
  83/* kaslr.c */
  84void 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
  90static 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 */
 100bool has_cpuflag(int flag);
 101
 102#ifdef CONFIG_X86_64
 103extern int set_page_decrypted(unsigned long address);
 104extern int set_page_encrypted(unsigned long address);
 105extern int set_page_non_present(unsigned long address);
 106extern unsigned char _pgtable[];
 107#endif
 108
 109#ifdef CONFIG_EARLY_PRINTK
 110/* early_serial_console.c */
 111extern int early_serial_base;
 112void console_init(void);
 113#else
 114static const int early_serial_base;
 115static inline void console_init(void)
 116{ }
 117#endif
 118
 119void set_sev_encryption_mask(void);
 120
 121#ifdef CONFIG_AMD_MEM_ENCRYPT
 122void sev_es_shutdown_ghcb(void);
 123extern bool sev_es_check_ghcb_fault(unsigned long address);
 124#else
 125static inline void sev_es_shutdown_ghcb(void) { }
 126static 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
 134acpi_physical_address get_rsdp_addr(void);
 135#else
 136static 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)
 140extern struct mem_vector immovable_mem[MAX_NUMNODES*2];
 141int count_immovable_mem_regions(void);
 142#else
 143static inline int count_immovable_mem_regions(void) { return 0; }
 144#endif
 145
 146/* ident_map_64.c */
 147#ifdef CONFIG_X86_5LEVEL
 148extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d;
 149#endif
 150
 151/* Used by PAGE_KERN* macros: */
 152extern pteval_t __default_kernel_pte_mask;
 153
 154/* idt_64.c */
 155extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
 156extern struct desc_ptr boot_idt_desc;
 157
 158#ifdef CONFIG_X86_64
 159void cleanup_exception_handling(void);
 160#else
 161static inline void cleanup_exception_handling(void) { }
 162#endif
 163
 164/* IDT Entry Points */
 165void boot_page_fault(void);
 166void boot_stage1_vc(void);
 167void boot_stage2_vc(void);
 168
 169unsigned long sev_verify_cbit(unsigned long cr3);
 170
 171#endif /* BOOT_COMPRESSED_MISC_H */
 172