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>,
"Palmer Dabbelt" <palmer@sifive.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
linux-riscv@lists.infradead.org,
"Alexandre Ghiti" <alex@ghiti.fr>,
"Paul Walmsley" <paul.walmsley@sifive.com>
Subject: [PATCH v13 07/22] riscv: mm: Add p?d_leaf() definitions
Date: Thu, 24 Oct 2019 10:37:01 +0100 [thread overview]
Message-ID: <20191024093716.49420-8-steven.price@arm.com> (raw)
In-Reply-To: <20191024093716.49420-1-steven.price@arm.com>
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 is provided by the
p?d_leaf() functions/macros.
For riscv a page is a leaf page when it has a read, write or execute bit
set on it.
CC: Palmer Dabbelt <palmer@sifive.com>
CC: Albert Ou <aou@eecs.berkeley.edu>
CC: linux-riscv@lists.infradead.org
Reviewed-by: Alexandre Ghiti <alex@ghiti.fr>
Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # for arch/riscv
Signed-off-by: Steven Price <steven.price@arm.com>
---
arch/riscv/include/asm/pgtable-64.h | 7 +++++++
arch/riscv/include/asm/pgtable.h | 7 +++++++
2 files changed, 14 insertions(+)
diff --git a/arch/riscv/include/asm/pgtable-64.h b/arch/riscv/include/asm/pgtable-64.h
index 74630989006d..4c4d2c65ba6c 100644
--- a/arch/riscv/include/asm/pgtable-64.h
+++ b/arch/riscv/include/asm/pgtable-64.h
@@ -43,6 +43,13 @@ static inline int pud_bad(pud_t pud)
return !pud_present(pud);
}
+#define pud_leaf pud_leaf
+static inline int pud_leaf(pud_t pud)
+{
+ return pud_present(pud) &&
+ (pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
+}
+
static inline void set_pud(pud_t *pudp, pud_t pud)
{
*pudp = pud;
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 7255f2d8395b..3aa972dda75a 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -130,6 +130,13 @@ static inline int pmd_bad(pmd_t pmd)
return !pmd_present(pmd);
}
+#define pmd_leaf pmd_leaf
+static inline int pmd_leaf(pmd_t pmd)
+{
+ return pmd_present(pmd) &&
+ (pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
+}
+
static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
{
*pmdp = pmd;
--
2.20.1
next prev parent reply other threads:[~2019-10-24 9:38 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 9:36 [PATCH v13 00/22] Generic page walk and ptdump Steven Price
2019-10-24 9:36 ` [PATCH v13 01/22] mm: Add generic p?d_leaf() macros Steven Price
2019-10-24 9:36 ` [PATCH v13 02/22] arc: mm: Add p?d_leaf() definitions Steven Price
2019-10-24 9:36 ` [PATCH v13 03/22] arm: " Steven Price
2019-10-24 9:36 ` [PATCH v13 04/22] arm64: " Steven Price
2019-10-24 9:36 ` [PATCH v13 05/22] mips: " Steven Price
2019-10-24 9:37 ` [PATCH v13 06/22] powerpc: " Steven Price
2019-10-24 9:37 ` Steven Price [this message]
2019-10-24 13:09 ` [PATCH v13 07/22] riscv: " Zong Li
2019-10-24 9:37 ` [PATCH v13 08/22] s390: " Steven Price
2019-10-24 9:37 ` [PATCH v13 09/22] sparc: " Steven Price
2019-10-24 16:46 ` David Miller
2019-10-24 9:37 ` [PATCH v13 10/22] x86: " Steven Price
2019-10-24 9:37 ` [PATCH v13 11/22] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price
2019-10-24 9:37 ` [PATCH v13 12/22] mm: pagewalk: Allow walking without vma Steven Price
2019-10-27 7:59 ` kbuild test robot
2019-10-28 10:46 ` Steven Price
2019-10-24 9:37 ` [PATCH v13 13/22] mm: pagewalk: Add test_p?d callbacks Steven Price
2019-10-24 9:37 ` [PATCH v13 14/22] mm: pagewalk: Add 'depth' parameter to pte_hole Steven Price
2019-10-24 9:37 ` [PATCH v13 15/22] x86: mm: Point to struct seq_file from struct pg_state Steven Price
2019-10-24 9:37 ` [PATCH v13 16/22] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price
2019-10-24 9:37 ` [PATCH v13 17/22] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price
2019-10-24 9:37 ` [PATCH v13 18/22] x86: mm: Convert ptdump_walk_pgd_level_core() " Steven Price
2019-10-24 9:37 ` [PATCH v13 19/22] mm: Add generic ptdump Steven Price
2019-10-24 9:37 ` [PATCH v13 20/22] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price
2019-10-24 9:37 ` [PATCH v13 21/22] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price
2019-10-24 9:37 ` [PATCH v13 22/22] arm64: mm: Display non-present entries in ptdump Steven Price
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