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@kernel.org>,
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>,
"Andrew Morton" <akpm@linux-foundation.org>
Subject: [PATCH v9 10/21] mm: Add generic p?d_leaf() macros
Date: Mon, 22 Jul 2019 16:41:59 +0100 [thread overview]
Message-ID: <20190722154210.42799-11-steven.price@arm.com> (raw)
In-Reply-To: <20190722154210.42799-1-steven.price@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).
For architectures that don't provide all p?d_leaf() macros, provide
generic do nothing default that are suitable where there cannot be leaf
pages that that level.
Signed-off-by: Steven Price <steven.price@arm.com>
---
include/asm-generic/pgtable.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 75d9d68a6de7..46275896ca66 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -1188,4 +1188,23 @@ static inline bool arch_has_pfn_modify_check(void)
#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED)
#endif
+/*
+ * p?d_leaf() - true if this entry is a final mapping to a physical address.
+ * This differs from p?d_huge() by the fact that they are always available (if
+ * the architecture supports large pages at the appropriate level) even
+ * if CONFIG_HUGETLB_PAGE is not defined.
+ */
+#ifndef pgd_leaf
+#define pgd_leaf(x) 0
+#endif
+#ifndef p4d_leaf
+#define p4d_leaf(x) 0
+#endif
+#ifndef pud_leaf
+#define pud_leaf(x) 0
+#endif
+#ifndef pmd_leaf
+#define pmd_leaf(x) 0
+#endif
+
#endif /* _ASM_GENERIC_PGTABLE_H */
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Steven Price <steven.price@arm.com>
To: linux-mm@kvack.org
Cc: "Mark Rutland" <Mark.Rutland@arm.com>,
x86@kernel.org, "Arnd Bergmann" <arnd@arndb.de>,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
linux-kernel@vger.kernel.org,
"Steven Price" <steven.price@arm.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Andy Lutomirski" <luto@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
"James Morse" <james.morse@arm.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Will Deacon" <will@kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
linux-arm-kernel@lists.infradead.org, "Liang,
Kan" <kan.liang@linux.intel.com>
Subject: [PATCH v9 10/21] mm: Add generic p?d_leaf() macros
Date: Mon, 22 Jul 2019 16:41:59 +0100 [thread overview]
Message-ID: <20190722154210.42799-11-steven.price@arm.com> (raw)
In-Reply-To: <20190722154210.42799-1-steven.price@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).
For architectures that don't provide all p?d_leaf() macros, provide
generic do nothing default that are suitable where there cannot be leaf
pages that that level.
Signed-off-by: Steven Price <steven.price@arm.com>
---
include/asm-generic/pgtable.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 75d9d68a6de7..46275896ca66 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -1188,4 +1188,23 @@ static inline bool arch_has_pfn_modify_check(void)
#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED)
#endif
+/*
+ * p?d_leaf() - true if this entry is a final mapping to a physical address.
+ * This differs from p?d_huge() by the fact that they are always available (if
+ * the architecture supports large pages at the appropriate level) even
+ * if CONFIG_HUGETLB_PAGE is not defined.
+ */
+#ifndef pgd_leaf
+#define pgd_leaf(x) 0
+#endif
+#ifndef p4d_leaf
+#define p4d_leaf(x) 0
+#endif
+#ifndef pud_leaf
+#define pud_leaf(x) 0
+#endif
+#ifndef pmd_leaf
+#define pmd_leaf(x) 0
+#endif
+
#endif /* _ASM_GENERIC_PGTABLE_H */
--
2.20.1
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-07-22 15:43 UTC|newest]
Thread overview: 129+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 15:41 [PATCH v9 00/21] Generic page walk and ptdump Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 01/21] arc: mm: Add p?d_leaf() definitions Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 02/21] arm: " Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 03/21] arm64: " Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 04/21] mips: " Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 21:47 ` Paul Burton
2019-07-22 21:47 ` Paul Burton
2019-07-24 13:03 ` Steven Price
2019-07-24 13:03 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 05/21] powerpc: " Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 06/21] riscv: " Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 07/21] s390: " Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 08/21] sparc: " Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` [PATCH v9 09/21] x86: " Steven Price
2019-07-22 15:41 ` Steven Price
2019-07-22 15:41 ` Steven Price [this message]
2019-07-22 15:41 ` [PATCH v9 10/21] mm: Add generic p?d_leaf() macros Steven Price
2019-07-23 9:41 ` Mark Rutland
2019-07-23 9:41 ` Mark Rutland
2019-07-24 13:48 ` Steven Price
2019-07-24 13:48 ` Steven Price
2019-07-28 11:44 ` Anshuman Khandual
2019-07-28 11:44 ` Anshuman Khandual
2019-07-29 11:38 ` Steven Price
2019-07-29 11:38 ` Steven Price
2019-08-01 6:09 ` Anshuman Khandual
2019-08-01 6:09 ` Anshuman Khandual
2019-08-01 12:22 ` Steven Price
2019-08-01 12:22 ` Steven Price
2019-07-29 12:50 ` Mark Rutland
2019-07-29 12:50 ` Mark Rutland
2019-08-01 6:13 ` Anshuman Khandual
2019-08-01 6:13 ` Anshuman Khandual
2019-07-22 15:42 ` [PATCH v9 11/21] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-23 10:14 ` Mark Rutland
2019-07-23 10:14 ` Mark Rutland
2019-07-24 13:53 ` Steven Price
2019-07-24 13:53 ` Steven Price
2019-07-24 14:09 ` Mark Rutland
2019-07-24 14:09 ` Mark Rutland
2019-07-28 12:33 ` Anshuman Khandual
2019-07-28 12:33 ` Anshuman Khandual
2019-07-29 12:17 ` Steven Price
2019-07-29 12:17 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 12/21] mm: pagewalk: Allow walking without vma Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-28 14:20 ` Anshuman Khandual
2019-07-28 14:20 ` Anshuman Khandual
2019-07-29 12:29 ` Steven Price
2019-07-29 12:29 ` Steven Price
2019-08-01 6:41 ` Anshuman Khandual
2019-08-01 6:41 ` Anshuman Khandual
2019-07-22 15:42 ` [PATCH v9 13/21] mm: pagewalk: Add test_p?d callbacks Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-28 13:41 ` Anshuman Khandual
2019-07-28 13:41 ` Anshuman Khandual
2019-07-29 12:34 ` Steven Price
2019-07-29 12:34 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 14/21] x86: mm: Don't display pages which aren't present in debugfs Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 15/21] x86: mm: Point to struct seq_file from struct pg_state Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 16/21] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 17/21] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 18/21] x86: mm: Convert ptdump_walk_pgd_level_core() " Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 19/21] mm: Add generic ptdump Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-23 9:57 ` Mark Rutland
2019-07-23 9:57 ` Mark Rutland
2019-07-24 16:36 ` Steven Price
2019-07-24 16:36 ` Steven Price
2019-07-29 2:59 ` Anshuman Khandual
2019-07-29 2:59 ` Anshuman Khandual
2019-07-29 13:56 ` Steven Price
2019-07-29 13:56 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 20/21] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-22 15:42 ` [PATCH v9 21/21] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price
2019-07-22 15:42 ` Steven Price
2019-07-23 6:39 ` [PATCH v9 00/21] Generic page walk and ptdump Anshuman Khandual
2019-07-23 6:39 ` Anshuman Khandual
2019-07-24 13:35 ` Steven Price
2019-07-24 13:35 ` Steven Price
2019-07-25 9:09 ` Anshuman Khandual
2019-07-25 9:09 ` Anshuman Khandual
2019-07-25 9:30 ` Will Deacon
2019-07-25 9:30 ` Will Deacon
2019-07-26 6:03 ` Anshuman Khandual
2019-07-26 6:03 ` Anshuman Khandual
2019-07-25 10:15 ` Steven Price
2019-07-25 10:15 ` Steven Price
2019-07-23 10:16 ` Mark Rutland
2019-07-23 10:16 ` Mark Rutland
2019-07-24 13:35 ` Steven Price
2019-07-24 13:35 ` Steven Price
2019-07-24 13:57 ` Thomas Gleixner
2019-07-24 13:57 ` Thomas Gleixner
2019-07-24 14:07 ` Mark Rutland
2019-07-24 14:07 ` Mark Rutland
2019-07-24 14:18 ` Steven Price
2019-07-24 14:18 ` Steven Price
2019-07-24 14:37 ` Thomas Gleixner
2019-07-24 14:37 ` Thomas Gleixner
2019-07-28 11:20 ` Anshuman Khandual
2019-07-28 11:20 ` Anshuman Khandual
2019-07-29 11:32 ` Steven Price
2019-07-29 11:32 ` Steven Price
2019-07-31 9:27 ` Sven Schnelle
2019-07-31 9:27 ` Sven Schnelle
2019-07-31 11:18 ` Steven Price
2019-07-31 11:18 ` Steven Price
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