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Diffstat (limited to 'arch/arm64/include/asm/ptdump.h')
| -rw-r--r-- | arch/arm64/include/asm/ptdump.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/ptdump.h b/arch/arm64/include/asm/ptdump.h new file mode 100644 index 000000000000..baff24004459 --- /dev/null +++ b/arch/arm64/include/asm/ptdump.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2014 ARM Ltd. + */ +#ifndef __ASM_PTDUMP_H +#define __ASM_PTDUMP_H + +#include <linux/ptdump.h> + +DECLARE_STATIC_KEY_FALSE(arm64_ptdump_lock_key); + +#ifdef CONFIG_PTDUMP + +#include <linux/mm_types.h> +#include <linux/seq_file.h> + +struct addr_marker { + unsigned long start_address; + char *name; +}; + +struct ptdump_info { + struct mm_struct *mm; + const struct addr_marker *markers; + unsigned long base_addr; +}; + +struct ptdump_prot_bits { + ptdesc_t mask; + ptdesc_t val; + const char *set; + const char *clear; +}; + +struct ptdump_pg_level { + const struct ptdump_prot_bits *bits; + char name[4]; + int num; + ptdesc_t mask; +}; + +/* + * The page dumper groups page table entries of the same type into a single + * description. It uses pg_state to track the range information while + * iterating over the pte entries. When the continuity is broken it then + * dumps out a description of the range. + */ +struct ptdump_pg_state { + struct ptdump_state ptdump; + struct ptdump_pg_level *pg_level; + struct seq_file *seq; + const struct addr_marker *marker; + const struct mm_struct *mm; + unsigned long start_address; + int level; + ptdesc_t current_prot; + bool check_wx; + unsigned long wx_pages; + unsigned long uxn_pages; +}; + +void ptdump_walk(struct seq_file *s, struct ptdump_info *info); +void note_page(struct ptdump_state *pt_st, unsigned long addr, int level, + pteval_t val); +void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte); +void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd); +void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud); +void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d); +void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd); +void note_page_flush(struct ptdump_state *st); +#ifdef CONFIG_PTDUMP_DEBUGFS +#define EFI_RUNTIME_MAP_END DEFAULT_MAP_WINDOW_64 +void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name); +#else +static inline void ptdump_debugfs_register(struct ptdump_info *info, + const char *name) { } +#endif /* CONFIG_PTDUMP_DEBUGFS */ +#else +static inline void note_page(struct ptdump_state *pt_st, unsigned long addr, + int level, pteval_t val) { } +static inline void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte) { } +static inline void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd) { } +static inline void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud) { } +static inline void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d) { } +static inline void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd) { } +static inline void note_page_flush(struct ptdump_state *st) { } +#endif /* CONFIG_PTDUMP */ + +#endif /* __ASM_PTDUMP_H */ |