arch/x86/boot/compressed/misc.h

Source file repositories/reference/linux-study-clean/arch/x86/boot/compressed/misc.h

File Facts

System
Linux kernel
Corpus path
arch/x86/boot/compressed/misc.h
Extension
.h
Size
6721 bytes
Lines
260
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct mem_vector {
	u64 start;
	u64 size;
};

#ifdef CONFIG_RANDOMIZE_BASE
/* kaslr.c */
void choose_random_location(unsigned long input,
			    unsigned long input_size,
			    unsigned long *output,
			    unsigned long output_size,
			    unsigned long *virt_addr);
#else
static inline void choose_random_location(unsigned long input,
					  unsigned long input_size,
					  unsigned long *output,
					  unsigned long output_size,
					  unsigned long *virt_addr)
{
}
#endif

/* cpuflags.c */
bool has_cpuflag(int flag);

#ifdef CONFIG_X86_64
extern int set_page_decrypted(unsigned long address);
extern int set_page_encrypted(unsigned long address);
extern int set_page_non_present(unsigned long address);
extern unsigned char _pgtable[];
#endif

#ifdef CONFIG_EARLY_PRINTK
/* early_serial_console.c */
extern int early_serial_base;
void console_init(void);
#else
static const int early_serial_base;
static inline void console_init(void)
{ }
#endif

#ifdef CONFIG_AMD_MEM_ENCRYPT
struct es_em_ctxt;
struct insn;

void sev_enable(struct boot_params *bp);
void snp_check_features(void);
void sev_es_shutdown_ghcb(void);
extern bool sev_es_check_ghcb_fault(unsigned long address);
void snp_set_page_private(unsigned long paddr);
void snp_set_page_shared(unsigned long paddr);
void sev_prep_identity_maps(unsigned long top_level_pgt);

enum es_result vc_decode_insn(struct es_em_ctxt *ctxt);
bool insn_has_rep_prefix(struct insn *insn);
void sev_insn_decode_init(void);
bool early_setup_ghcb(void);
#else
static inline void snp_check_features(void) { }
static inline void sev_es_shutdown_ghcb(void) { }
static inline bool sev_es_check_ghcb_fault(unsigned long address)
{
	return false;
}
static inline void snp_set_page_private(unsigned long paddr) { }
static inline void snp_set_page_shared(unsigned long paddr) { }
static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { }
#endif

/* acpi.c */
#ifdef CONFIG_ACPI
acpi_physical_address get_rsdp_addr(void);
#else
static inline acpi_physical_address get_rsdp_addr(void) { return 0; }
#endif

#if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI)
extern struct mem_vector immovable_mem[MAX_NUMNODES*2];
int count_immovable_mem_regions(void);
#else
static inline int count_immovable_mem_regions(void) { return 0; }
#endif

/* ident_map_64.c */
extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d;
extern void kernel_add_identity_map(unsigned long start, unsigned long end);

/* Used by PAGE_KERN* macros: */
extern pteval_t __default_kernel_pte_mask;

Annotation

Implementation Notes