misc.h (5835B)
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 <asm/page.h> 26#include <asm/boot.h> 27#include <asm/bootparam.h> 28#include <asm/desc_defs.h> 29 30#include "tdx.h" 31 32#define BOOT_CTYPE_H 33#include <linux/acpi.h> 34 35#define BOOT_BOOT_H 36#include "../ctype.h" 37#include "../io.h" 38 39#include "efi.h" 40 41#ifdef CONFIG_X86_64 42#define memptr long 43#else 44#define memptr unsigned 45#endif 46 47/* boot/compressed/vmlinux start and end markers */ 48extern char _head[], _end[]; 49 50/* misc.c */ 51extern memptr free_mem_ptr; 52extern memptr free_mem_end_ptr; 53void *malloc(int size); 54void free(void *where); 55extern struct boot_params *boot_params; 56void __putstr(const char *s); 57void __puthex(unsigned long value); 58#define error_putstr(__x) __putstr(__x) 59#define error_puthex(__x) __puthex(__x) 60 61#ifdef CONFIG_X86_VERBOSE_BOOTUP 62 63#define debug_putstr(__x) __putstr(__x) 64#define debug_puthex(__x) __puthex(__x) 65#define debug_putaddr(__x) { \ 66 debug_putstr(#__x ": 0x"); \ 67 debug_puthex((unsigned long)(__x)); \ 68 debug_putstr("\n"); \ 69 } 70 71#else 72 73static inline void debug_putstr(const char *s) 74{ } 75static inline void debug_puthex(unsigned long value) 76{ } 77#define debug_putaddr(x) /* */ 78 79#endif 80 81/* cmdline.c */ 82int cmdline_find_option(const char *option, char *buffer, int bufsize); 83int cmdline_find_option_bool(const char *option); 84 85struct mem_vector { 86 u64 start; 87 u64 size; 88}; 89 90#ifdef CONFIG_RANDOMIZE_BASE 91/* kaslr.c */ 92void 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#else 98static inline void choose_random_location(unsigned long input, 99 unsigned long input_size, 100 unsigned long *output, 101 unsigned long output_size, 102 unsigned long *virt_addr) 103{ 104} 105#endif 106 107/* cpuflags.c */ 108bool has_cpuflag(int flag); 109 110#ifdef CONFIG_X86_64 111extern int set_page_decrypted(unsigned long address); 112extern int set_page_encrypted(unsigned long address); 113extern int set_page_non_present(unsigned long address); 114extern unsigned char _pgtable[]; 115#endif 116 117#ifdef CONFIG_EARLY_PRINTK 118/* early_serial_console.c */ 119extern int early_serial_base; 120void console_init(void); 121#else 122static const int early_serial_base; 123static inline void console_init(void) 124{ } 125#endif 126 127#ifdef CONFIG_AMD_MEM_ENCRYPT 128void sev_enable(struct boot_params *bp); 129void sev_es_shutdown_ghcb(void); 130extern bool sev_es_check_ghcb_fault(unsigned long address); 131void snp_set_page_private(unsigned long paddr); 132void snp_set_page_shared(unsigned long paddr); 133void sev_prep_identity_maps(unsigned long top_level_pgt); 134#else 135static inline void sev_enable(struct boot_params *bp) { } 136static inline void sev_es_shutdown_ghcb(void) { } 137static inline bool sev_es_check_ghcb_fault(unsigned long address) 138{ 139 return false; 140} 141static inline void snp_set_page_private(unsigned long paddr) { } 142static inline void snp_set_page_shared(unsigned long paddr) { } 143static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { } 144#endif 145 146/* acpi.c */ 147#ifdef CONFIG_ACPI 148acpi_physical_address get_rsdp_addr(void); 149#else 150static inline acpi_physical_address get_rsdp_addr(void) { return 0; } 151#endif 152 153#if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI) 154extern struct mem_vector immovable_mem[MAX_NUMNODES*2]; 155int count_immovable_mem_regions(void); 156#else 157static inline int count_immovable_mem_regions(void) { return 0; } 158#endif 159 160/* ident_map_64.c */ 161#ifdef CONFIG_X86_5LEVEL 162extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d; 163#endif 164extern void kernel_add_identity_map(unsigned long start, unsigned long end); 165 166/* Used by PAGE_KERN* macros: */ 167extern pteval_t __default_kernel_pte_mask; 168 169/* idt_64.c */ 170extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; 171extern struct desc_ptr boot_idt_desc; 172 173#ifdef CONFIG_X86_64 174void cleanup_exception_handling(void); 175#else 176static inline void cleanup_exception_handling(void) { } 177#endif 178 179/* IDT Entry Points */ 180void boot_page_fault(void); 181void boot_stage1_vc(void); 182void boot_stage2_vc(void); 183 184unsigned long sev_verify_cbit(unsigned long cr3); 185 186enum efi_type { 187 EFI_TYPE_64, 188 EFI_TYPE_32, 189 EFI_TYPE_NONE, 190}; 191 192#ifdef CONFIG_EFI 193/* helpers for early EFI config table access */ 194enum efi_type efi_get_type(struct boot_params *bp); 195unsigned long efi_get_system_table(struct boot_params *bp); 196int efi_get_conf_table(struct boot_params *bp, unsigned long *cfg_tbl_pa, 197 unsigned int *cfg_tbl_len); 198unsigned long efi_find_vendor_table(struct boot_params *bp, 199 unsigned long cfg_tbl_pa, 200 unsigned int cfg_tbl_len, 201 efi_guid_t guid); 202#else 203static inline enum efi_type efi_get_type(struct boot_params *bp) 204{ 205 return EFI_TYPE_NONE; 206} 207 208static inline unsigned long efi_get_system_table(struct boot_params *bp) 209{ 210 return 0; 211} 212 213static inline int efi_get_conf_table(struct boot_params *bp, 214 unsigned long *cfg_tbl_pa, 215 unsigned int *cfg_tbl_len) 216{ 217 return -ENOENT; 218} 219 220static inline 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{ 225 return 0; 226} 227#endif /* CONFIG_EFI */ 228 229#endif /* BOOT_COMPRESSED_MISC_H */