1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef BOOT_COMPRESSED_MISC_H
3 #define BOOT_COMPRESSED_MISC_H
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.)
11 #undef CONFIG_PARAVIRT
12 #undef CONFIG_PARAVIRT_XXL
13 #undef CONFIG_PARAVIRT_SPINLOCKS
15 #undef CONFIG_KASAN_GENERIC
19 /* cpu_feature_enabled() cannot be used this early */
20 #define USE_EARLY_PGTABLE_L5
22 #include <linux/linkage.h>
23 #include <linux/screen_info.h>
24 #include <linux/elf.h>
27 #include <asm/bootparam.h>
28 #include <asm/desc_defs.h>
33 #include <linux/acpi.h>
44 #define memptr unsigned
47 /* boot/compressed/vmlinux start and end markers */
48 extern char _head[], _end[];
51 extern memptr free_mem_ptr;
52 extern memptr free_mem_end_ptr;
53 void *malloc(int size);
54 void free(void *where);
55 extern struct boot_params *boot_params;
56 void __putstr(const char *s);
57 void __puthex(unsigned long value);
58 #define error_putstr(__x) __putstr(__x)
59 #define error_puthex(__x) __puthex(__x)
61 #ifdef CONFIG_X86_VERBOSE_BOOTUP
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)); \
73 static inline void debug_putstr(const char *s)
75 static inline void debug_puthex(unsigned long value)
77 #define debug_putaddr(x) /* */
82 int cmdline_find_option(const char *option, char *buffer, int bufsize);
83 int cmdline_find_option_bool(const char *option);
90 #ifdef CONFIG_RANDOMIZE_BASE
92 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);
98 static 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)
108 bool has_cpuflag(int flag);
111 extern int set_page_decrypted(unsigned long address);
112 extern int set_page_encrypted(unsigned long address);
113 extern int set_page_non_present(unsigned long address);
114 extern unsigned char _pgtable[];
117 #ifdef CONFIG_EARLY_PRINTK
118 /* early_serial_console.c */
119 extern int early_serial_base;
120 void console_init(void);
122 static const int early_serial_base;
123 static inline void console_init(void)
127 #ifdef CONFIG_AMD_MEM_ENCRYPT
128 void sev_enable(struct boot_params *bp);
129 void sev_es_shutdown_ghcb(void);
130 extern bool sev_es_check_ghcb_fault(unsigned long address);
131 void snp_set_page_private(unsigned long paddr);
132 void snp_set_page_shared(unsigned long paddr);
133 void sev_prep_identity_maps(unsigned long top_level_pgt);
135 static inline void sev_enable(struct boot_params *bp)
138 * bp->cc_blob_address should only be set by boot/compressed kernel.
139 * Initialize it to 0 unconditionally (thus here in this stub too) to
140 * ensure that uninitialized values from buggy bootloaders aren't
144 bp->cc_blob_address = 0;
146 static inline void sev_es_shutdown_ghcb(void) { }
147 static inline bool sev_es_check_ghcb_fault(unsigned long address)
151 static inline void snp_set_page_private(unsigned long paddr) { }
152 static inline void snp_set_page_shared(unsigned long paddr) { }
153 static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { }
158 acpi_physical_address get_rsdp_addr(void);
160 static inline acpi_physical_address get_rsdp_addr(void) { return 0; }
163 #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI)
164 extern struct mem_vector immovable_mem[MAX_NUMNODES*2];
165 int count_immovable_mem_regions(void);
167 static inline int count_immovable_mem_regions(void) { return 0; }
171 #ifdef CONFIG_X86_5LEVEL
172 extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d;
174 extern void kernel_add_identity_map(unsigned long start, unsigned long end);
176 /* Used by PAGE_KERN* macros: */
177 extern pteval_t __default_kernel_pte_mask;
180 extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
181 extern struct desc_ptr boot_idt_desc;
184 void cleanup_exception_handling(void);
186 static inline void cleanup_exception_handling(void) { }
189 /* IDT Entry Points */
190 void boot_page_fault(void);
191 void boot_stage1_vc(void);
192 void boot_stage2_vc(void);
194 unsigned long sev_verify_cbit(unsigned long cr3);
203 /* helpers for early EFI config table access */
204 enum efi_type efi_get_type(struct boot_params *bp);
205 unsigned long efi_get_system_table(struct boot_params *bp);
206 int efi_get_conf_table(struct boot_params *bp, unsigned long *cfg_tbl_pa,
207 unsigned int *cfg_tbl_len);
208 unsigned long efi_find_vendor_table(struct boot_params *bp,
209 unsigned long cfg_tbl_pa,
210 unsigned int cfg_tbl_len,
213 static inline enum efi_type efi_get_type(struct boot_params *bp)
215 return EFI_TYPE_NONE;
218 static inline unsigned long efi_get_system_table(struct boot_params *bp)
223 static inline int efi_get_conf_table(struct boot_params *bp,
224 unsigned long *cfg_tbl_pa,
225 unsigned int *cfg_tbl_len)
230 static inline unsigned long efi_find_vendor_table(struct boot_params *bp,
231 unsigned long cfg_tbl_pa,
232 unsigned int cfg_tbl_len,
237 #endif /* CONFIG_EFI */
239 #endif /* BOOT_COMPRESSED_MISC_H */