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/* 23 * Boot stub deals with identity mappings, physical and virtual addresses are 24 * the same, so override these defines. 25 * 26 * <asm/page.h> will not define them if they are already defined. 27 */ 28#define __pa(x) ((unsigned long)(x)) 29#define __va(x) ((void *)((unsigned long)(x))) 30 31#include <linux/linkage.h> 32#include <linux/screen_info.h> 33#include <linux/elf.h> 34#include <asm/page.h> 35#include <asm/boot.h> 36#include <asm/bootparam.h> 37#include <asm/desc_defs.h> 38 39#include "tdx.h" 40 41#define BOOT_CTYPE_H 42#include <linux/acpi.h> 43 44#define BOOT_BOOT_H 45#include "../ctype.h" 46#include "../io.h" 47 48#include "efi.h" 49 50#ifdef CONFIG_X86_64 51#define memptr long 52#else 53#define memptr unsigned 54#endif 55 56/* boot/compressed/vmlinux start and end markers */ 57extern char _head[], _end[]; 58 59/* misc.c */ 60extern memptr free_mem_ptr; 61extern memptr free_mem_end_ptr; 62extern int spurious_nmi_count; 63void *malloc(int size); 64void free(void *where); 65void __putstr(const char *s); 66void __puthex(unsigned long value); 67void __putdec(unsigned long value); 68#define error_putstr(__x) __putstr(__x) 69#define error_puthex(__x) __puthex(__x) 70#define error_putdec(__x) __putdec(__x) 71 72#ifdef CONFIG_X86_VERBOSE_BOOTUP 73 74#define debug_putstr(__x) __putstr(__x) 75#define debug_puthex(__x) __puthex(__x) 76#define debug_putaddr(__x) { \ 77 debug_putstr(#__x ": 0x"); \ 78 debug_puthex((unsigned long)(__x)); \ 79 debug_putstr("\n"); \ 80 } 81 82#else 83 84static inline void debug_putstr(const char *s) 85{ } 86static inline void debug_puthex(unsigned long value) 87{ } 88#define debug_putaddr(x) /* */ 89 90#endif 91 92/* cmdline.c */ 93int cmdline_find_option(const char *option, char *buffer, int bufsize); 94int cmdline_find_option_bool(const char *option); 95 96struct mem_vector { 97 u64 start; 98 u64 size; 99}; 100 101#ifdef CONFIG_RANDOMIZE_BASE 102/* kaslr.c */ 103void choose_random_location(unsigned long input, 104 unsigned long input_size, 105 unsigned long *output, 106 unsigned long output_size, 107 unsigned long *virt_addr); 108#else 109static inline void choose_random_location(unsigned long input, 110 unsigned long input_size, 111 unsigned long *output, 112 unsigned long output_size, 113 unsigned long *virt_addr) 114{ 115} 116#endif 117 118/* cpuflags.c */ 119bool has_cpuflag(int flag); 120 121#ifdef CONFIG_X86_64 122extern int set_page_decrypted(unsigned long address); 123extern int set_page_encrypted(unsigned long address); 124extern int set_page_non_present(unsigned long address); 125extern unsigned char _pgtable[]; 126#endif 127 128#ifdef CONFIG_EARLY_PRINTK 129/* early_serial_console.c */ 130extern int early_serial_base; 131void console_init(void); 132#else 133static const int early_serial_base; 134static inline void console_init(void) 135{ } 136#endif 137 138#ifdef CONFIG_AMD_MEM_ENCRYPT 139void sev_enable(struct boot_params *bp); 140void snp_check_features(void); 141void sev_es_shutdown_ghcb(void); 142extern bool sev_es_check_ghcb_fault(unsigned long address); 143void snp_set_page_private(unsigned long paddr); 144void snp_set_page_shared(unsigned long paddr); 145void sev_prep_identity_maps(unsigned long top_level_pgt); 146#else 147static inline void sev_enable(struct boot_params *bp) 148{ 149 /* 150 * bp->cc_blob_address should only be set by boot/compressed kernel. 151 * Initialize it to 0 unconditionally (thus here in this stub too) to 152 * ensure that uninitialized values from buggy bootloaders aren't 153 * propagated. 154 */ 155 if (bp) 156 bp->cc_blob_address = 0; 157} 158static inline void snp_check_features(void) { } 159static inline void sev_es_shutdown_ghcb(void) { } 160static inline bool sev_es_check_ghcb_fault(unsigned long address) 161{ 162 return false; 163} 164static inline void snp_set_page_private(unsigned long paddr) { } 165static inline void snp_set_page_shared(unsigned long paddr) { } 166static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { } 167#endif 168 169/* acpi.c */ 170#ifdef CONFIG_ACPI 171acpi_physical_address get_rsdp_addr(void); 172#else 173static inline acpi_physical_address get_rsdp_addr(void) { return 0; } 174#endif 175 176#if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI) 177extern struct mem_vector immovable_mem[MAX_NUMNODES*2]; 178int count_immovable_mem_regions(void); 179#else 180static inline int count_immovable_mem_regions(void) { return 0; } 181#endif 182 183/* ident_map_64.c */ 184extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d; 185extern void kernel_add_identity_map(unsigned long start, unsigned long end); 186 187/* Used by PAGE_KERN* macros: */ 188extern pteval_t __default_kernel_pte_mask; 189 190/* idt_64.c */ 191extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; 192extern struct desc_ptr boot_idt_desc; 193 194#ifdef CONFIG_X86_64 195void cleanup_exception_handling(void); 196#else 197static inline void cleanup_exception_handling(void) { } 198#endif 199 200/* IDT Entry Points */ 201void boot_page_fault(void); 202void boot_nmi_trap(void); 203void boot_stage1_vc(void); 204void boot_stage2_vc(void); 205 206unsigned long sev_verify_cbit(unsigned long cr3); 207 208enum efi_type { 209 EFI_TYPE_64, 210 EFI_TYPE_32, 211 EFI_TYPE_NONE, 212}; 213 214#ifdef CONFIG_EFI 215/* helpers for early EFI config table access */ 216enum efi_type efi_get_type(struct boot_params *bp); 217unsigned long efi_get_system_table(struct boot_params *bp); 218int efi_get_conf_table(struct boot_params *bp, unsigned long *cfg_tbl_pa, 219 unsigned int *cfg_tbl_len); 220unsigned 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#else 225static inline enum efi_type efi_get_type(struct boot_params *bp) 226{ 227 return EFI_TYPE_NONE; 228} 229 230static inline unsigned long efi_get_system_table(struct boot_params *bp) 231{ 232 return 0; 233} 234 235static inline int efi_get_conf_table(struct boot_params *bp, 236 unsigned long *cfg_tbl_pa, 237 unsigned int *cfg_tbl_len) 238{ 239 return -ENOENT; 240} 241 242static inline unsigned long efi_find_vendor_table(struct boot_params *bp, 243 unsigned long cfg_tbl_pa, 244 unsigned int cfg_tbl_len, 245 efi_guid_t guid) 246{ 247 return 0; 248} 249#endif /* CONFIG_EFI */ 250 251#ifdef CONFIG_UNACCEPTED_MEMORY 252bool init_unaccepted_memory(void); 253#else 254static inline bool init_unaccepted_memory(void) { return false; } 255#endif 256 257/* Defined in EFI stub */ 258extern struct efi_unaccepted_memory *unaccepted_table; 259void accept_memory(phys_addr_t start, phys_addr_t end); 260 261#endif /* BOOT_COMPRESSED_MISC_H */ 262