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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-03 07:44:50 +02:00
/* SPDX-License-Identifier: GPL-2.0-only */
arm64: mm: dump: make page table dumping reusable For debugging purposes, it would be nice if we could export page tables other than the swapper_pg_dir to userspace. To enable this, this patch refactors the arm64 page table dumping code such that multiple tables may be registered with the framework, and exported under debugfs. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Laura Abbott <labbott@fedoraproject.org> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-05-31 14:49:01 +01:00
/*
* Copyright (C) 2014 ARM Ltd.
*/
#ifndef __ASM_PTDUMP_H
#define __ASM_PTDUMP_H
arm64: ptdump: Expose the attribute parsing functionality Reuse the descriptor parsing functionality to keep the same output format as the original ptdump code. In order for this to happen, move the state tracking objects into a common header. [maz: Fixed note_page() stub as suggested by Will] Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-3-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:18 +00:00
#include <linux/ptdump.h>
mm: rename GENERIC_PTDUMP and PTDUMP_CORE Platforms subscribe into generic ptdump implementation via GENERIC_PTDUMP. But generic ptdump gets enabled via PTDUMP_CORE. These configs combination is confusing as they sound very similar and does not differentiate between platform's feature subscription and feature enablement for ptdump. Rename the configs as ARCH_HAS_PTDUMP and PTDUMP making it more clear and improve readability. Link: https://lkml.kernel.org/r/20250226122404.1927473-6-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> (powerpc) Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Will Deacon <will@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Marc Zyngier <maz@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Steven Price <steven.price@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-26 17:54:04 +05:30
#ifdef CONFIG_PTDUMP
arm64: mm: dump: make page table dumping reusable For debugging purposes, it would be nice if we could export page tables other than the swapper_pg_dir to userspace. To enable this, this patch refactors the arm64 page table dumping code such that multiple tables may be registered with the framework, and exported under debugfs. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Laura Abbott <labbott@fedoraproject.org> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-05-31 14:49:01 +01:00
#include <linux/mm_types.h>
arm64: dump: Make ptdump debugfs a separate option ptdump_register currently initializes a set of page table information and registers debugfs. There are uses for the ptdump option without wanting the debugfs options. Split this out to make it a separate option. Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-10-27 09:27:31 -07:00
#include <linux/seq_file.h>
arm64: mm: dump: make page table dumping reusable For debugging purposes, it would be nice if we could export page tables other than the swapper_pg_dir to userspace. To enable this, this patch refactors the arm64 page table dumping code such that multiple tables may be registered with the framework, and exported under debugfs. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Laura Abbott <labbott@fedoraproject.org> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-05-31 14:49:01 +01:00
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;
};
arm64: ptdump: Expose the attribute parsing functionality Reuse the descriptor parsing functionality to keep the same output format as the original ptdump code. In order for this to happen, move the state tracking objects into a common header. [maz: Fixed note_page() stub as suggested by Will] Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-3-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:18 +00:00
struct ptdump_prot_bits {
arm64/mm: define ptdesc_t 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>
2025-04-07 11:01:13 +05:30
ptdesc_t mask;
ptdesc_t val;
arm64: ptdump: Expose the attribute parsing functionality Reuse the descriptor parsing functionality to keep the same output format as the original ptdump code. In order for this to happen, move the state tracking objects into a common header. [maz: Fixed note_page() stub as suggested by Will] Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-3-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:18 +00:00
const char *set;
const char *clear;
};
struct ptdump_pg_level {
const struct ptdump_prot_bits *bits;
char name[4];
int num;
arm64/mm: define ptdesc_t 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>
2025-04-07 11:01:13 +05:30
ptdesc_t mask;
arm64: ptdump: Expose the attribute parsing functionality Reuse the descriptor parsing functionality to keep the same output format as the original ptdump code. In order for this to happen, move the state tracking objects into a common header. [maz: Fixed note_page() stub as suggested by Will] Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-3-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:18 +00:00
};
/*
* 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;
arm64: ptdump: Use the ptdump description from a local context Rename the attributes description array to allow the parsing method to use the description from a local context. To be able to do this, store a pointer to the description array in the state structure. This will allow for the later introduced callers (stage_2 ptdump) to specify their own page table description format to the ptdump parser. Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-4-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:19 +00:00
struct ptdump_pg_level *pg_level;
arm64: ptdump: Expose the attribute parsing functionality Reuse the descriptor parsing functionality to keep the same output format as the original ptdump code. In order for this to happen, move the state tracking objects into a common header. [maz: Fixed note_page() stub as suggested by Will] Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-3-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:18 +00:00
struct seq_file *seq;
const struct addr_marker *marker;
const struct mm_struct *mm;
unsigned long start_address;
int level;
arm64/mm: define ptdesc_t 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>
2025-04-07 11:01:13 +05:30
ptdesc_t current_prot;
arm64: ptdump: Expose the attribute parsing functionality Reuse the descriptor parsing functionality to keep the same output format as the original ptdump code. In order for this to happen, move the state tracking objects into a common header. [maz: Fixed note_page() stub as suggested by Will] Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-3-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:18 +00:00
bool check_wx;
unsigned long wx_pages;
unsigned long uxn_pages;
};
arm64: mm: convert mm/dump.c to use walk_page_range() Now walk_page_range() can walk kernel page tables, we can switch the arm64 ptdump code over to using it, simplifying the code. Link: http://lkml.kernel.org/r/20191218162402.45610-22-steven.price@arm.com Signed-off-by: Steven Price <steven.price@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Hogan <jhogan@kernel.org> Cc: James Morse <james.morse@arm.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: "Liang, Kan" <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Zong Li <zong.li@sifive.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-03 17:36:29 -08:00
void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
arm64: ptdump: Expose the attribute parsing functionality Reuse the descriptor parsing functionality to keep the same output format as the original ptdump code. In order for this to happen, move the state tracking objects into a common header. [maz: Fixed note_page() stub as suggested by Will] Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-3-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:18 +00:00
void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
mm/ptdump: split note_page() into level specific callbacks Patch series "mm/ptdump: Drop assumption that pxd_val() is u64", v2. Last argument passed down in note_page() is u64 assuming pxd_val() returned value (all page table levels) is 64 bit - which might not be the case going ahead when D128 page tables is enabled on arm64 platform. Besides pxd_val() is very platform specific and its type should not be assumed in generic MM. A similar problem exists for effective_prot(), although it is restricted to x86 platform. This series splits note_page() and effective_prot() into individual page table level specific callbacks which accepts corresponding pxd_t page table entry as an argument instead and later on all subscribing platforms could derive pxd_val() from the table entries as required and proceed as before. 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. This patch (of 3): Last argument passed down in note_page() is u64 assuming pxd_val() returned value (all page table levels) is 64 bit - which might not be the case going ahead when D128 page tables is enabled on arm64 platform. Besides pxd_val() is very platform specific and its type should not be assumed in generic MM. Split note_page() into individual page table level specific callbacks which accepts corresponding pxd_t argument instead and then subscribing platforms just derive pxd_val() from the entries as required and proceed as earlier. Also add a note_page_flush() callback for flushing the last page table page that was being handled earlier via level = -1. Link: https://lkml.kernel.org/r/20250407053113.746295-1-anshuman.khandual@arm.com Link: https://lkml.kernel.org/r/20250407053113.746295-2-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-04-07 11:01:11 +05:30
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);
arm64: mm: convert mm/dump.c to use walk_page_range() Now walk_page_range() can walk kernel page tables, we can switch the arm64 ptdump code over to using it, simplifying the code. Link: http://lkml.kernel.org/r/20191218162402.45610-22-steven.price@arm.com Signed-off-by: Steven Price <steven.price@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Hogan <jhogan@kernel.org> Cc: James Morse <james.morse@arm.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: "Liang, Kan" <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Zong Li <zong.li@sifive.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-03 17:36:29 -08:00
#ifdef CONFIG_PTDUMP_DEBUGFS
ARM: 9255/1: efi/dump UEFI runtime page tables for ARM UEFI runtime page tables dump only for ARM64 at present, but ARM support EFI and ARM_PTDUMP_DEBUGFS now. Since ARM could potentially execute with a 1G/3G user/kernel split, choosing 1G as the upper limit for UEFI runtime end, with this, we could enable UEFI runtime page tables on ARM. Acked-by: Ard Biesheuvel <ardb@kernel.org> Tested-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2022-10-11 02:35:07 +01:00
#define EFI_RUNTIME_MAP_END DEFAULT_MAP_WINDOW_64
arm64: Add __init section marker to some functions They are not needed after booting, so mark them as __init to move them to the .init section. Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com> Reviewed-by: Steven Price <steven.price@arm.com> Link: https://lore.kernel.org/r/20210330135449.4dcffd7f@xhacker.debian Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-03-30 13:54:49 +08:00
void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
arm64: mm: dump: make page table dumping reusable For debugging purposes, it would be nice if we could export page tables other than the swapper_pg_dir to userspace. To enable this, this patch refactors the arm64 page table dumping code such that multiple tables may be registered with the framework, and exported under debugfs. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Laura Abbott <labbott@fedoraproject.org> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-05-31 14:49:01 +01:00
#else
arm64: dump: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Will Deacon <will.deacon@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Peng Donglin <dolinux.peng@gmail.com> Cc: <linux-arm-kernel@lists.infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-01-22 15:41:11 +01:00
static inline void ptdump_debugfs_register(struct ptdump_info *info,
const char *name) { }
arm64: ptdump: Expose the attribute parsing functionality Reuse the descriptor parsing functionality to keep the same output format as the original ptdump code. In order for this to happen, move the state tracking objects into a common header. [maz: Fixed note_page() stub as suggested by Will] Signed-off-by: Sebastian Ene <sebastianene@google.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240909124721.1672199-3-sebastianene@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
2024-09-09 12:47:18 +00:00
#endif /* CONFIG_PTDUMP_DEBUGFS */
#else
static inline void note_page(struct ptdump_state *pt_st, unsigned long addr,
mm/ptdump: split note_page() into level specific callbacks Patch series "mm/ptdump: Drop assumption that pxd_val() is u64", v2. Last argument passed down in note_page() is u64 assuming pxd_val() returned value (all page table levels) is 64 bit - which might not be the case going ahead when D128 page tables is enabled on arm64 platform. Besides pxd_val() is very platform specific and its type should not be assumed in generic MM. A similar problem exists for effective_prot(), although it is restricted to x86 platform. This series splits note_page() and effective_prot() into individual page table level specific callbacks which accepts corresponding pxd_t page table entry as an argument instead and later on all subscribing platforms could derive pxd_val() from the table entries as required and proceed as before. 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. This patch (of 3): Last argument passed down in note_page() is u64 assuming pxd_val() returned value (all page table levels) is 64 bit - which might not be the case going ahead when D128 page tables is enabled on arm64 platform. Besides pxd_val() is very platform specific and its type should not be assumed in generic MM. Split note_page() into individual page table level specific callbacks which accepts corresponding pxd_t argument instead and then subscribing platforms just derive pxd_val() from the entries as required and proceed as earlier. Also add a note_page_flush() callback for flushing the last page table page that was being handled earlier via level = -1. Link: https://lkml.kernel.org/r/20250407053113.746295-1-anshuman.khandual@arm.com Link: https://lkml.kernel.org/r/20250407053113.746295-2-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-04-07 11:01:11 +05:30
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) { }
mm: rename GENERIC_PTDUMP and PTDUMP_CORE Platforms subscribe into generic ptdump implementation via GENERIC_PTDUMP. But generic ptdump gets enabled via PTDUMP_CORE. These configs combination is confusing as they sound very similar and does not differentiate between platform's feature subscription and feature enablement for ptdump. Rename the configs as ARCH_HAS_PTDUMP and PTDUMP making it more clear and improve readability. Link: https://lkml.kernel.org/r/20250226122404.1927473-6-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> (powerpc) Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Will Deacon <will@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Marc Zyngier <maz@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Steven Price <steven.price@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-26 17:54:04 +05:30
#endif /* CONFIG_PTDUMP */
arm64: dump: Add checking for writable and exectuable pages Page mappings with full RWX permissions are a security risk. x86 has an option to walk the page tables and dump any bad pages. (See e1a58320a38d ("x86/mm: Warn on W^X mappings")). Add a similar implementation for arm64. Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Laura Abbott <labbott@redhat.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> [catalin.marinas@arm.com: folded fix for KASan out of bounds from Mark Rutland] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-10-27 09:27:34 -07:00
arm64: mm: dump: make page table dumping reusable For debugging purposes, it would be nice if we could export page tables other than the swapper_pg_dir to userspace. To enable this, this patch refactors the arm64 page table dumping code such that multiple tables may be registered with the framework, and exported under debugfs. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Laura Abbott <labbott@fedoraproject.org> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-05-31 14:49:01 +01:00
#endif /* __ASM_PTDUMP_H */
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