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>, "Ralf Baechle" <ralf@linux-mips.org>, "Paul Burton" <paul.burton@mips.com>, "James Hogan" <jhogan@kernel.org>, linux-mips@vger.kernel.org Subject: [PATCH v9 04/21] mips: mm: Add p?d_leaf() definitions Date: Mon, 22 Jul 2019 16:41:53 +0100 [thread overview] Message-ID: <20190722154210.42799-5-steven.price@arm.com> (raw) In-Reply-To: <20190722154210.42799-1-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 mips, we only support large pages on 64 bit. For 64 bit if _PAGE_HUGE is defined we can simply look for it. When not defined we can be confident that there are no leaf pages in existence and fall back on the generic implementation (added in a later patch) which returns 0. CC: Ralf Baechle <ralf@linux-mips.org> CC: Paul Burton <paul.burton@mips.com> CC: James Hogan <jhogan@kernel.org> CC: linux-mips@vger.kernel.org Signed-off-by: Steven Price <steven.price@arm.com> --- arch/mips/include/asm/pgtable-64.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h index 93a9dce31f25..2bdbf8652b5f 100644 --- a/arch/mips/include/asm/pgtable-64.h +++ b/arch/mips/include/asm/pgtable-64.h @@ -273,6 +273,10 @@ static inline int pmd_present(pmd_t pmd) return pmd_val(pmd) != (unsigned long) invalid_pte_table; } +#ifdef _PAGE_HUGE +#define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) != 0) +#endif + static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = ((unsigned long) invalid_pte_table); @@ -297,6 +301,10 @@ static inline int pud_present(pud_t pud) return pud_val(pud) != (unsigned long) invalid_pmd_table; } +#ifdef _PAGE_HUGE +#define pud_leaf(pud) ((pud_val(pud) & _PAGE_HUGE) != 0) +#endif + static inline void pud_clear(pud_t *pudp) { pud_val(*pudp) = ((unsigned long) invalid_pmd_table); -- 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>, "Peter Zijlstra" <peterz@infradead.org>, "Catalin Marinas" <catalin.marinas@arm.com>, "Dave Hansen" <dave.hansen@linux.intel.com>, linux-mips@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>, "Will Deacon" <will@kernel.org>, "Liang, Kan" <kan.liang@linux.intel.com>, x86@kernel.org, "Steven Price" <steven.price@arm.com>, "Ingo Molnar" <mingo@redhat.com>, "James Hogan" <jhogan@kernel.org>, "Arnd Bergmann" <arnd@arndb.de>, "Jérôme Glisse" <jglisse@redhat.com>, "Borislav Petkov" <bp@alien8.de>, "Andy Lutomirski" <luto@kernel.org>, "Thomas Gleixner" <tglx@linutronix.de>, linux-arm-kernel@lists.infradead.org, "Ard Biesheuvel" <ard.biesheuvel@linaro.org>, linux-kernel@vger.kernel.org, "Ralf Baechle" <ralf@linux-mips.org>, "Paul Burton" <paul.burton@mips.com>, "James Morse" <james.morse@arm.com>, "Andrew Morton" <akpm@linux-foundation.org> Subject: [PATCH v9 04/21] mips: mm: Add p?d_leaf() definitions Date: Mon, 22 Jul 2019 16:41:53 +0100 [thread overview] Message-ID: <20190722154210.42799-5-steven.price@arm.com> (raw) In-Reply-To: <20190722154210.42799-1-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 mips, we only support large pages on 64 bit. For 64 bit if _PAGE_HUGE is defined we can simply look for it. When not defined we can be confident that there are no leaf pages in existence and fall back on the generic implementation (added in a later patch) which returns 0. CC: Ralf Baechle <ralf@linux-mips.org> CC: Paul Burton <paul.burton@mips.com> CC: James Hogan <jhogan@kernel.org> CC: linux-mips@vger.kernel.org Signed-off-by: Steven Price <steven.price@arm.com> --- arch/mips/include/asm/pgtable-64.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h index 93a9dce31f25..2bdbf8652b5f 100644 --- a/arch/mips/include/asm/pgtable-64.h +++ b/arch/mips/include/asm/pgtable-64.h @@ -273,6 +273,10 @@ static inline int pmd_present(pmd_t pmd) return pmd_val(pmd) != (unsigned long) invalid_pte_table; } +#ifdef _PAGE_HUGE +#define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) != 0) +#endif + static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = ((unsigned long) invalid_pte_table); @@ -297,6 +301,10 @@ static inline int pud_present(pud_t pud) return pud_val(pud) != (unsigned long) invalid_pmd_table; } +#ifdef _PAGE_HUGE +#define pud_leaf(pud) ((pud_val(pud) & _PAGE_HUGE) != 0) +#endif + static inline void pud_clear(pud_t *pudp) { pud_val(*pudp) = ((unsigned long) invalid_pmd_table); -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-07-22 15:42 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 ` Steven Price [this message] 2019-07-22 15:41 ` [PATCH v9 04/21] mips: " 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 ` [PATCH v9 10/21] mm: Add generic p?d_leaf() macros Steven Price 2019-07-22 15:41 ` 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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