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 */
230