1#ifndef BOOT_COMPRESSED_MISC_H
 2#define BOOT_COMPRESSED_MISC_H
 3
 4/*
 5 * we have to be careful, because no indirections are allowed here, and
 6 * paravirt_ops is a kind of one. As it will only run in baremetal anyway,
 7 * we just keep it from happening
 
 8 */
 9#undef CONFIG_PARAVIRT
10#ifdef CONFIG_X86_32
11#define _ASM_X86_DESC_H 1
12#endif
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
13
14#include <linux/linkage.h>
15#include <linux/screen_info.h>
16#include <linux/elf.h>
17#include <linux/io.h>
18#include <asm/page.h>
19#include <asm/boot.h>
20#include <asm/bootparam.h>
21#include <asm/bootparam_utils.h>
 
 
 
 
 
22
23#define BOOT_BOOT_H
24#include "../ctype.h"
 
 
 
25
26#ifdef CONFIG_X86_64
27#define memptr long
28#else
29#define memptr unsigned
30#endif
31
 
 
 
32/* misc.c */
33extern memptr free_mem_ptr;
34extern memptr free_mem_end_ptr;
35extern struct boot_params *real_mode;		/* Pointer to real-mode data */
 
36void __putstr(const char *s);
 
37#define error_putstr(__x)  __putstr(__x)
 
38
39#ifdef CONFIG_X86_VERBOSE_BOOTUP
40
41#define debug_putstr(__x)  __putstr(__x)
 
 
 
 
 
 
42
43#else
44
45static inline void debug_putstr(const char *s)
46{ }
 
 
 
47
48#endif
49
50#if CONFIG_EARLY_PRINTK || CONFIG_RANDOMIZE_BASE
51/* cmdline.c */
52int cmdline_find_option(const char *option, char *buffer, int bufsize);
53int cmdline_find_option_bool(const char *option);
54#endif
55
56
57#if CONFIG_RANDOMIZE_BASE
58/* aslr.c */
59unsigned char *choose_kernel_location(unsigned char *input,
60				      unsigned long input_size,
61				      unsigned char *output,
62				      unsigned long output_size);
63/* cpuflags.c */
64bool has_cpuflag(int flag);
 
 
 
 
65#else
66static inline
67unsigned char *choose_kernel_location(unsigned char *input,
68				      unsigned long input_size,
69				      unsigned char *output,
70				      unsigned long output_size)
71{
72	return output;
73}
74#endif
75
 
 
 
 
 
 
 
 
 
 
76#ifdef CONFIG_EARLY_PRINTK
77/* early_serial_console.c */
78extern int early_serial_base;
79void console_init(void);
80#else
81static const int early_serial_base;
82static inline void console_init(void)
83{ }
84#endif
85
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
86#endif

  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;
 62void *malloc(int size);
 63void free(void *where);
 64void __putstr(const char *s);
 65void __puthex(unsigned long value);
 66#define error_putstr(__x)  __putstr(__x)
 67#define error_puthex(__x)  __puthex(__x)
 68
 69#ifdef CONFIG_X86_VERBOSE_BOOTUP
 70
 71#define debug_putstr(__x)  __putstr(__x)
 72#define debug_puthex(__x)  __puthex(__x)
 73#define debug_putaddr(__x) { \
 74		debug_putstr(#__x ": 0x"); \
 75		debug_puthex((unsigned long)(__x)); \
 76		debug_putstr("\n"); \
 77	}
 78
 79#else
 80
 81static inline void debug_putstr(const char *s)
 82{ }
 83static inline void debug_puthex(unsigned long value)
 84{ }
 85#define debug_putaddr(x) /* */
 86
 87#endif
 88
 
 89/* cmdline.c */
 90int cmdline_find_option(const char *option, char *buffer, int bufsize);
 91int cmdline_find_option_bool(const char *option);
 
 
 92
 93struct mem_vector {
 94	u64 start;
 95	u64 size;
 96};
 97
 98#ifdef CONFIG_RANDOMIZE_BASE
 99/* kaslr.c */
100void choose_random_location(unsigned long input,
101			    unsigned long input_size,
102			    unsigned long *output,
103			    unsigned long output_size,
104			    unsigned long *virt_addr);
105#else
106static inline void choose_random_location(unsigned long input,
107					  unsigned long input_size,
108					  unsigned long *output,
109					  unsigned long output_size,
110					  unsigned long *virt_addr)
111{
 
112}
113#endif
114
115/* cpuflags.c */
116bool has_cpuflag(int flag);
117
118#ifdef CONFIG_X86_64
119extern int set_page_decrypted(unsigned long address);
120extern int set_page_encrypted(unsigned long address);
121extern int set_page_non_present(unsigned long address);
122extern unsigned char _pgtable[];
123#endif
124
125#ifdef CONFIG_EARLY_PRINTK
126/* early_serial_console.c */
127extern int early_serial_base;
128void console_init(void);
129#else
130static const int early_serial_base;
131static inline void console_init(void)
132{ }
133#endif
134
135#ifdef CONFIG_AMD_MEM_ENCRYPT
136void sev_enable(struct boot_params *bp);
137void snp_check_features(void);
138void sev_es_shutdown_ghcb(void);
139extern bool sev_es_check_ghcb_fault(unsigned long address);
140void snp_set_page_private(unsigned long paddr);
141void snp_set_page_shared(unsigned long paddr);
142void sev_prep_identity_maps(unsigned long top_level_pgt);
143#else
144static inline void sev_enable(struct boot_params *bp)
145{
146	/*
147	 * bp->cc_blob_address should only be set by boot/compressed kernel.
148	 * Initialize it to 0 unconditionally (thus here in this stub too) to
149	 * ensure that uninitialized values from buggy bootloaders aren't
150	 * propagated.
151	 */
152	if (bp)
153		bp->cc_blob_address = 0;
154}
155static inline void snp_check_features(void) { }
156static inline void sev_es_shutdown_ghcb(void) { }
157static inline bool sev_es_check_ghcb_fault(unsigned long address)
158{
159	return false;
160}
161static inline void snp_set_page_private(unsigned long paddr) { }
162static inline void snp_set_page_shared(unsigned long paddr) { }
163static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { }
164#endif
165
166/* acpi.c */
167#ifdef CONFIG_ACPI
168acpi_physical_address get_rsdp_addr(void);
169#else
170static inline acpi_physical_address get_rsdp_addr(void) { return 0; }
171#endif
172
173#if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI)
174extern struct mem_vector immovable_mem[MAX_NUMNODES*2];
175int count_immovable_mem_regions(void);
176#else
177static inline int count_immovable_mem_regions(void) { return 0; }
178#endif
179
180/* ident_map_64.c */
181extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d;
182extern void kernel_add_identity_map(unsigned long start, unsigned long end);
183
184/* Used by PAGE_KERN* macros: */
185extern pteval_t __default_kernel_pte_mask;
186
187/* idt_64.c */
188extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
189extern struct desc_ptr boot_idt_desc;
190
191#ifdef CONFIG_X86_64
192void cleanup_exception_handling(void);
193#else
194static inline void cleanup_exception_handling(void) { }
195#endif
196
197/* IDT Entry Points */
198void boot_page_fault(void);
199void boot_nmi_trap(void);
200void boot_stage1_vc(void);
201void boot_stage2_vc(void);
202
203unsigned long sev_verify_cbit(unsigned long cr3);
204
205enum efi_type {
206	EFI_TYPE_64,
207	EFI_TYPE_32,
208	EFI_TYPE_NONE,
209};
210
211#ifdef CONFIG_EFI
212/* helpers for early EFI config table access */
213enum efi_type efi_get_type(struct boot_params *bp);
214unsigned long efi_get_system_table(struct boot_params *bp);
215int efi_get_conf_table(struct boot_params *bp, unsigned long *cfg_tbl_pa,
216		       unsigned int *cfg_tbl_len);
217unsigned long efi_find_vendor_table(struct boot_params *bp,
218				    unsigned long cfg_tbl_pa,
219				    unsigned int cfg_tbl_len,
220				    efi_guid_t guid);
221#else
222static inline enum efi_type efi_get_type(struct boot_params *bp)
223{
224	return EFI_TYPE_NONE;
225}
226
227static inline unsigned long efi_get_system_table(struct boot_params *bp)
228{
229	return 0;
230}
231
232static inline int efi_get_conf_table(struct boot_params *bp,
233				     unsigned long *cfg_tbl_pa,
234				     unsigned int *cfg_tbl_len)
235{
236	return -ENOENT;
237}
238
239static inline unsigned long efi_find_vendor_table(struct boot_params *bp,
240						  unsigned long cfg_tbl_pa,
241						  unsigned int cfg_tbl_len,
242						  efi_guid_t guid)
243{
244	return 0;
245}
246#endif /* CONFIG_EFI */
247
248#ifdef CONFIG_UNACCEPTED_MEMORY
249bool init_unaccepted_memory(void);
250#else
251static inline bool init_unaccepted_memory(void) { return false; }
252#endif
253
254/* Defined in EFI stub */
255extern struct efi_unaccepted_memory *unaccepted_table;
256void accept_memory(phys_addr_t start, phys_addr_t end);
257
258#endif /* BOOT_COMPRESSED_MISC_H */