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Define ptdesc_t type which describes the basic page table descriptor layout on arm64 platform. Subsequently all level specific pxxval_t descriptors are derived from ptdesc_t thus establishing a common original format, which can also be appropriate for page table entries, masks and protection values etc which are used at all page table levels. Link: https://lkml.kernel.org/r/20250407053113.746295-4-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Suggested-by: Ryan Roberts <ryan.roberts@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2014 ARM Ltd.
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*/
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#ifndef __ASM_PTDUMP_H
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#define __ASM_PTDUMP_H
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#include <linux/ptdump.h>
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#ifdef CONFIG_PTDUMP
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#include <linux/mm_types.h>
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#include <linux/seq_file.h>
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struct addr_marker {
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unsigned long start_address;
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char *name;
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};
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struct ptdump_info {
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struct mm_struct *mm;
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const struct addr_marker *markers;
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unsigned long base_addr;
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};
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struct ptdump_prot_bits {
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ptdesc_t mask;
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ptdesc_t val;
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const char *set;
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const char *clear;
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};
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struct ptdump_pg_level {
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const struct ptdump_prot_bits *bits;
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char name[4];
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int num;
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ptdesc_t mask;
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};
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/*
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* The page dumper groups page table entries of the same type into a single
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* description. It uses pg_state to track the range information while
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* iterating over the pte entries. When the continuity is broken it then
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* dumps out a description of the range.
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*/
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struct ptdump_pg_state {
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struct ptdump_state ptdump;
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struct ptdump_pg_level *pg_level;
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struct seq_file *seq;
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const struct addr_marker *marker;
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const struct mm_struct *mm;
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unsigned long start_address;
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int level;
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ptdesc_t current_prot;
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bool check_wx;
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unsigned long wx_pages;
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unsigned long uxn_pages;
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};
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void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
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void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
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pteval_t val);
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void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte);
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void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd);
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void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud);
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void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d);
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void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd);
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void note_page_flush(struct ptdump_state *st);
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#ifdef CONFIG_PTDUMP_DEBUGFS
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#define EFI_RUNTIME_MAP_END DEFAULT_MAP_WINDOW_64
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void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
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#else
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static inline void ptdump_debugfs_register(struct ptdump_info *info,
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const char *name) { }
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#endif /* CONFIG_PTDUMP_DEBUGFS */
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#else
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static inline void note_page(struct ptdump_state *pt_st, unsigned long addr,
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int level, pteval_t val) { }
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static inline void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte) { }
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static inline void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd) { }
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static inline void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud) { }
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static inline void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d) { }
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static inline void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd) { }
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static inline void note_page_flush(struct ptdump_state *st) { }
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#endif /* CONFIG_PTDUMP */
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#endif /* __ASM_PTDUMP_H */
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