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 v14 05/22] mips: mm: Add p?d_leaf() definitions Date: Mon, 28 Oct 2019 13:58:53 +0000 [thread overview] Message-ID: <20191028135910.33253-6-steven.price@arm.com> (raw) In-Reply-To: <20191028135910.33253-1-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. 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> Acked-by: Paul Burton <paul.burton@mips.com> --- arch/mips/include/asm/pgtable.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index f85bd5b15f51..fff392ea80c7 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -639,6 +639,11 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +#ifdef _PAGE_HUGE +#define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) != 0) +#define pud_leaf(pud) ((pud_val(pud) & _PAGE_HUGE) != 0) +#endif + #define gup_fast_permitted(start, end) (!cpu_has_dc_aliases) #include <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>, "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 v14 05/22] mips: mm: Add p?d_leaf() definitions Date: Mon, 28 Oct 2019 13:58:53 +0000 [thread overview] Message-ID: <20191028135910.33253-6-steven.price@arm.com> (raw) In-Reply-To: <20191028135910.33253-1-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. 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> Acked-by: Paul Burton <paul.burton@mips.com> --- arch/mips/include/asm/pgtable.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index f85bd5b15f51..fff392ea80c7 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -639,6 +639,11 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +#ifdef _PAGE_HUGE +#define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) != 0) +#define pud_leaf(pud) ((pud_val(pud) & _PAGE_HUGE) != 0) +#endif + #define gup_fast_permitted(start, end) (!cpu_has_dc_aliases) #include <asm-generic/pgtable.h> -- 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:[~2019-10-28 13:59 UTC|newest] Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-10-28 13:58 [PATCH v14 00/22] Generic page walk and ptdump Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 01/22] mm: Add generic p?d_leaf() macros Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 02/22] arc: mm: Add p?d_leaf() definitions Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 03/22] arm: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 04/22] arm64: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-30 15:31 ` Catalin Marinas 2019-10-30 15:31 ` Catalin Marinas 2019-10-28 13:58 ` Steven Price [this message] 2019-10-28 13:58 ` [PATCH v14 05/22] mips: " Steven Price 2019-10-28 13:58 ` [PATCH v14 06/22] powerpc: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 07/22] riscv: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 08/22] s390: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 09/22] sparc: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 10/22] x86: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 11/22] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 12/22] mm: pagewalk: Allow walking without vma Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-31 15:15 ` [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference,address kernel test robot 2019-10-31 15:15 ` kernel test robot 2019-10-31 15:15 ` [LTP] [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference, address kernel test robot 2019-10-31 17:22 ` [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference,address Steven Price 2019-10-31 17:22 ` [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference, address Steven Price 2019-10-31 17:22 ` [LTP] " Steven Price 2019-10-31 17:22 ` [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference,address Steven Price 2019-10-28 13:59 ` [PATCH v14 13/22] mm: pagewalk: Add test_p?d callbacks Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 14/22] mm: pagewalk: Add 'depth' parameter to pte_hole Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 15/22] x86: mm: Point to struct seq_file from struct pg_state Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 16/22] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 17/22] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 18/22] x86: mm: Convert ptdump_walk_pgd_level_core() " Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 19/22] mm: Add generic ptdump Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-30 16:48 ` Catalin Marinas 2019-10-30 16:48 ` Catalin Marinas 2019-10-28 13:59 ` [PATCH v14 20/22] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 21/22] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-30 16:45 ` Catalin Marinas 2019-10-30 16:45 ` Catalin Marinas 2019-10-31 13:32 ` Steven Price 2019-10-31 13:32 ` Steven Price 2019-10-31 13:33 ` [PATCH] mm: ptdump: Reduce level numbers by 1 in note_page() Steven Price 2019-10-31 13:33 ` Steven Price 2019-10-31 14:36 ` Catalin Marinas 2019-10-31 14:36 ` Catalin Marinas 2019-10-31 14:00 ` [PATCH v14 21/22] arm64: mm: Convert mm/dump.c to use walk_page_range() Catalin Marinas 2019-10-31 14:00 ` Catalin Marinas 2019-10-31 14:37 ` Catalin Marinas 2019-10-31 14:37 ` Catalin Marinas 2019-10-28 13:59 ` [PATCH v14 22/22] arm64: mm: Display non-present entries in ptdump Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-30 16:50 ` Catalin Marinas 2019-10-30 16:50 ` Catalin Marinas
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20191028135910.33253-6-steven.price@arm.com \ --to=steven.price@arm.com \ --cc=Mark.Rutland@arm.com \ --cc=akpm@linux-foundation.org \ --cc=ard.biesheuvel@linaro.org \ --cc=arnd@arndb.de \ --cc=bp@alien8.de \ --cc=catalin.marinas@arm.com \ --cc=dave.hansen@linux.intel.com \ --cc=hpa@zytor.com \ --cc=james.morse@arm.com \ --cc=jglisse@redhat.com \ --cc=jhogan@kernel.org \ --cc=kan.liang@linux.intel.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mips@vger.kernel.org \ --cc=linux-mm@kvack.org \ --cc=luto@kernel.org \ --cc=mingo@redhat.com \ --cc=paul.burton@mips.com \ --cc=peterz@infradead.org \ --cc=ralf@linux-mips.org \ --cc=tglx@linutronix.de \ --cc=will@kernel.org \ --cc=x86@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.