[PATCH v5 02/19] arm64: mm: Add p?d_large() definitions

[PATCH v5 00/19] Convert x86 & arm64 to use generic page walk · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 01/19] arc: mm: Add p?d_large() definitions · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 02/19] arm64: mm: Add p?d_large() definitions · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 03/19] mips: mm: Add p?d_large() definitions · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 04/19] powerpc: mm: Add p?d_large() definitions · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 05/19] riscv: mm: Add p?d_large() definitions · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 06/19] s390: mm: Add p?d_large() definitions · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 07/19] sparc: mm: Add p?d_large() definitions · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 08/19] x86: mm: Add p?d_large() definitions · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 09/19] mm: Add generic p?d_large() macros · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 10/19] mm: pagewalk: Add p4d_entry() and pgd_entry() · Steven Price <steven.price@arm.com> · 2019-03-21
Re: [PATCH v5 10/19] mm: pagewalk: Add p4d_entry() and pgd_entry() · Mike Rapoport <hidden> · 2019-03-21
Re: [PATCH v5 10/19] mm: pagewalk: Add p4d_entry() and pgd_entry() · Steven Price <steven.price@arm.com> · 2019-03-22
Re: [PATCH v5 10/19] mm: pagewalk: Add p4d_entry() and pgd_entry() · Mike Rapoport <hidden> · 2019-03-22
Re: [PATCH v5 10/19] mm: pagewalk: Add p4d_entry() and pgd_entry() · Steven Price <steven.price@arm.com> · 2019-03-22
[PATCH v5 11/19] mm: pagewalk: Allow walking without vma · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 12/19] mm: pagewalk: Add test_p?d callbacks · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 13/19] arm64: mm: Convert mm/dump.c to use walk_page_range() · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 14/19] x86: mm: Don't display pages which aren't present in debugfs · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 16/19] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 17/19] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 18/19] x86: mm: Convert ptdump_walk_pgd_level_core() to take an mm_struct · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 19/19] x86: mm: Convert dump_pagetables to use walk_page_range · Steven Price <steven.price@arm.com> · 2019-03-21
[PATCH v5 15/19] x86: mm: Point to struct seq_file from struct pg_state · Steven Price <steven.price@arm.com> · 2019-03-21

STALE2636d

Revisions (8)

2019-02-15 v1 [diff vs current]
2019-02-21 v2 [diff vs current]
2019-02-27 v3 [diff vs current]
2019-03-06 v4 [diff vs current]
2019-03-21 v5 current
2019-03-26 v6 [diff vs current]
2019-03-28 v7 [diff vs current]
2019-04-03 v8 [diff vs current]

From: Steven Price <steven.price@arm.com>
Date: 2019-03-21 14:20:24
Also in: linux-mm, lkml
Subsystem: arm64 port (aarch64 architecture), the rest · Maintainers: Catalin Marinas, Will Deacon, Linus Torvalds

walk_page_range() is going to be allowed to walk page tables other than
those of user space. For this it needs to know when it has reached a
'leaf' entry in the page tables. This information will be provided by the
p?d_large() functions/macros.

For arm64, we already have p?d_sect() macros which we can reuse for
p?d_large().

CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <redacted>
Signed-off-by: Steven Price <steven.price@arm.com>
---
 arch/arm64/include/asm/pgtable.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index de70c1eabf33..6eef345dbaf4 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h

@@ -428,6 +428,7 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
 				 PMD_TYPE_TABLE)
 #define pmd_sect(pmd)		((pmd_val(pmd) & PMD_TYPE_MASK) == \
 				 PMD_TYPE_SECT)
+#define pmd_large(pmd)		pmd_sect(pmd)
 
 #if defined(CONFIG_ARM64_64K_PAGES) || CONFIG_PGTABLE_LEVELS < 3
 #define pud_sect(pud)		(0)

@@ -511,6 +512,7 @@ static inline phys_addr_t pmd_page_paddr(pmd_t pmd)
 #define pud_none(pud)		(!pud_val(pud))
 #define pud_bad(pud)		(!(pud_val(pud) & PUD_TABLE_BIT))
 #define pud_present(pud)	pte_present(pud_pte(pud))
+#define pud_large(pud)		pud_sect(pud)
 #define pud_valid(pud)		pte_valid(pud_pte(pud))
 
 static inline void set_pud(pud_t *pudp, pud_t pud)

-- 
2.20.1


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