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From: Steven Price <steven.price@arm.com>
To: linux-mm@kvack.org
Cc: "Steven Price" <steven.price@arm.com>,
	"Andy Lutomirski" <luto@kernel.org>,
	"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
	"Arnd Bergmann" <arnd@arndb.de>, "Borislav Petkov" <bp@alien8.de>,
	"Catalin Marinas" <catalin.marinas@arm.com>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	"Ingo Molnar" <mingo@redhat.com>,
	"James Morse" <james.morse@arm.com>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Will Deacon" <will.deacon@arm.com>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	"Mark Rutland" <Mark.Rutland@arm.com>,
	"Liang, Kan" <kan.liang@linux.intel.com>
Subject: [PATCH v2 01/13] arm64: mm: Add p?d_large() definitions
Date: Thu, 21 Feb 2019 11:34:50 +0000	[thread overview]
Message-ID: <20190221113502.54153-2-steven.price@arm.com> (raw)
In-Reply-To: <20190221113502.54153-1-steven.price@arm.com>

From: James Morse <james.morse@arm.com>

Exposing the pud/pgd levels of the page tables to walk_page_range() means
we may come across the exotic large mappings that come with large areas
of contiguous memory (such as the kernel's linear map).

Expose p?d_large() from each architecture to detect these large mappings.

arm64 already has these macros defined, but with a different name.
p?d_large() is used by s390, sparc and x86. Only arm/arm64 use p?d_sect().
Add a macro to allow both names.

Signed-off-by: James Morse <james.morse@arm.com>
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..09d308921625 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(x)		pmd_sect(x)
 
 #if defined(CONFIG_ARM64_64K_PAGES) || CONFIG_PGTABLE_LEVELS < 3
 #define pud_sect(pud)		(0)
@@ -435,6 +436,7 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
 #else
 #define pud_sect(pud)		((pud_val(pud) & PUD_TYPE_MASK) == \
 				 PUD_TYPE_SECT)
+#define pud_large(x)		pud_sect(x)
 #define pud_table(pud)		((pud_val(pud) & PUD_TYPE_MASK) == \
 				 PUD_TYPE_TABLE)
 #endif
-- 
2.20.1


  reply	other threads:[~2019-02-21 11:35 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-21 11:34 [PATCH v2 00/13] Convert x86 & arm64 to use generic page walk Steven Price
2019-02-21 11:34 ` Steven Price [this message]
2019-02-21 13:52   ` [PATCH v2 01/13] arm64: mm: Add p?d_large() definitions Mark Rutland
2019-02-21 11:34 ` [PATCH v2 02/13] x86/mm: " Steven Price
2019-02-21 14:21   ` Kirill A. Shutemov
2019-02-21 11:34 ` [PATCH v2 03/13] mm: Add generic p?d_large() macros Steven Price
2019-02-21 13:41   ` Mark Rutland
2019-02-21 14:28   ` Kirill A. Shutemov
2019-02-21 14:46     ` Steven Price
2019-02-21 14:57       ` Kirill A. Shutemov
2019-02-21 17:16         ` Steven Price
2019-02-21 21:06           ` Kirill A. Shutemov
2019-02-22 10:21             ` Steven Price
2019-03-01 11:53             ` Mike Rapoport
2019-03-01 12:30               ` Kirill A. Shutemov
2019-03-01 13:39                 ` Steven Price
2019-03-03  7:12                   ` Mike Rapoport
2019-03-04 14:35                     ` Steven Price
2019-03-04 14:53                       ` Mike Rapoport
2019-03-01 11:49         ` Mike Rapoport
2019-03-01 12:28           ` Kirill A. Shutemov
2019-02-21 11:34 ` [PATCH v2 04/13] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price
2019-02-21 11:34 ` [PATCH v2 05/13] mm: pagewalk: Allow walking without vma Steven Price
2019-02-21 11:34 ` [PATCH v2 06/13] mm: pagewalk: Add 'depth' parameter to pte_hole Steven Price
2019-02-21 11:34 ` [PATCH v2 07/13] mm: pagewalk: Add test_p?d callbacks Steven Price
2019-02-21 11:34 ` [PATCH v2 08/13] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price
2019-02-21 11:34 ` [PATCH v2 09/13] x86/mm: Point to struct seq_file from struct pg_state Steven Price
2019-02-21 11:34 ` [PATCH v2 10/13] x86/mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price
2019-02-21 11:35 ` [PATCH v2 11/13] x86/mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price
2019-02-21 11:35 ` [PATCH v2 12/13] x86/mm: Convert ptdump_walk_pgd_level_core() " Steven Price
2019-02-21 11:35 ` [PATCH v2 13/13] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price

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