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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/x86/boot/compressed/misc.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/boot/compressed/misc.h')
-rw-r--r-- | arch/x86/boot/compressed/misc.h | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h new file mode 100644 index 0000000000..cc70d3fb90 --- /dev/null +++ b/arch/x86/boot/compressed/misc.h @@ -0,0 +1,258 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef BOOT_COMPRESSED_MISC_H +#define BOOT_COMPRESSED_MISC_H + +/* + * Special hack: we have to be careful, because no indirections are allowed here, + * and paravirt_ops is a kind of one. As it will only run in baremetal anyway, + * we just keep it from happening. (This list needs to be extended when new + * paravirt and debugging variants are added.) + */ +#undef CONFIG_PARAVIRT +#undef CONFIG_PARAVIRT_XXL +#undef CONFIG_PARAVIRT_SPINLOCKS +#undef CONFIG_KASAN +#undef CONFIG_KASAN_GENERIC + +#define __NO_FORTIFY + +/* cpu_feature_enabled() cannot be used this early */ +#define USE_EARLY_PGTABLE_L5 + +/* + * Boot stub deals with identity mappings, physical and virtual addresses are + * the same, so override these defines. + * + * <asm/page.h> will not define them if they are already defined. + */ +#define __pa(x) ((unsigned long)(x)) +#define __va(x) ((void *)((unsigned long)(x))) + +#include <linux/linkage.h> +#include <linux/screen_info.h> +#include <linux/elf.h> +#include <asm/page.h> +#include <asm/boot.h> +#include <asm/bootparam.h> +#include <asm/desc_defs.h> + +#include "tdx.h" + +#define BOOT_CTYPE_H +#include <linux/acpi.h> + +#define BOOT_BOOT_H +#include "../ctype.h" +#include "../io.h" + +#include "efi.h" + +#ifdef CONFIG_X86_64 +#define memptr long +#else +#define memptr unsigned +#endif + +/* boot/compressed/vmlinux start and end markers */ +extern char _head[], _end[]; + +/* misc.c */ +extern memptr free_mem_ptr; +extern memptr free_mem_end_ptr; +void *malloc(int size); +void free(void *where); +extern struct boot_params *boot_params; +void __putstr(const char *s); +void __puthex(unsigned long value); +#define error_putstr(__x) __putstr(__x) +#define error_puthex(__x) __puthex(__x) + +#ifdef CONFIG_X86_VERBOSE_BOOTUP + +#define debug_putstr(__x) __putstr(__x) +#define debug_puthex(__x) __puthex(__x) +#define debug_putaddr(__x) { \ + debug_putstr(#__x ": 0x"); \ + debug_puthex((unsigned long)(__x)); \ + debug_putstr("\n"); \ + } + +#else + +static inline void debug_putstr(const char *s) +{ } +static inline void debug_puthex(unsigned long value) +{ } +#define debug_putaddr(x) /* */ + +#endif + +/* cmdline.c */ +int cmdline_find_option(const char *option, char *buffer, int bufsize); +int cmdline_find_option_bool(const char *option); + +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 +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); +#else +static inline void sev_enable(struct boot_params *bp) +{ + /* + * bp->cc_blob_address should only be set by boot/compressed kernel. + * Initialize it to 0 unconditionally (thus here in this stub too) to + * ensure that uninitialized values from buggy bootloaders aren't + * propagated. + */ + if (bp) + bp->cc_blob_address = 0; +} +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; + +/* idt_64.c */ +extern gate_desc boot_idt[BOOT_IDT_ENTRIES]; +extern struct desc_ptr boot_idt_desc; + +#ifdef CONFIG_X86_64 +void cleanup_exception_handling(void); +#else +static inline void cleanup_exception_handling(void) { } +#endif + +/* IDT Entry Points */ +void boot_page_fault(void); +void boot_stage1_vc(void); +void boot_stage2_vc(void); + +unsigned long sev_verify_cbit(unsigned long cr3); + +enum efi_type { + EFI_TYPE_64, + EFI_TYPE_32, + EFI_TYPE_NONE, +}; + +#ifdef CONFIG_EFI +/* helpers for early EFI config table access */ +enum efi_type efi_get_type(struct boot_params *bp); +unsigned long efi_get_system_table(struct boot_params *bp); +int efi_get_conf_table(struct boot_params *bp, unsigned long *cfg_tbl_pa, + unsigned int *cfg_tbl_len); +unsigned long efi_find_vendor_table(struct boot_params *bp, + unsigned long cfg_tbl_pa, + unsigned int cfg_tbl_len, + efi_guid_t guid); +#else +static inline enum efi_type efi_get_type(struct boot_params *bp) +{ + return EFI_TYPE_NONE; +} + +static inline unsigned long efi_get_system_table(struct boot_params *bp) +{ + return 0; +} + +static inline int efi_get_conf_table(struct boot_params *bp, + unsigned long *cfg_tbl_pa, + unsigned int *cfg_tbl_len) +{ + return -ENOENT; +} + +static inline unsigned long efi_find_vendor_table(struct boot_params *bp, + unsigned long cfg_tbl_pa, + unsigned int cfg_tbl_len, + efi_guid_t guid) +{ + return 0; +} +#endif /* CONFIG_EFI */ + +#ifdef CONFIG_UNACCEPTED_MEMORY +bool init_unaccepted_memory(void); +#else +static inline bool init_unaccepted_memory(void) { return false; } +#endif + +/* Defined in EFI stub */ +extern struct efi_unaccepted_memory *unaccepted_table; +void accept_memory(phys_addr_t start, phys_addr_t end); + +#endif /* BOOT_COMPRESSED_MISC_H */ |