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 v6 09/19] mm: Add generic p?d_large() macros Date: Tue, 26 Mar 2019 16:26:14 +0000 [thread overview] Message-ID: <20190326162624.20736-10-steven.price@arm.com> (raw) In-Reply-To: <20190326162624.20736-1-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 p?d_large() macros, provide generic does nothing defaults. 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 fa782fba51ee..9c5d0f73db67 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1186,4 +1186,23 @@ static inline bool arch_has_pfn_modify_check(void) #define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) #endif +/* + * p?d_large() - 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_large +#define pgd_large(x) 0 +#endif +#ifndef p4d_large +#define p4d_large(x) 0 +#endif +#ifndef pud_large +#define pud_large(x) 0 +#endif +#ifndef pmd_large +#define pmd_large(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>, "Will Deacon" <will.deacon@arm.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>, linux-arm-kernel@lists.infradead.org, "Liang, Kan" <kan.liang@linux.intel.com> Subject: [PATCH v6 09/19] mm: Add generic p?d_large() macros Date: Tue, 26 Mar 2019 16:26:14 +0000 [thread overview] Message-ID: <20190326162624.20736-10-steven.price@arm.com> (raw) In-Reply-To: <20190326162624.20736-1-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 p?d_large() macros, provide generic does nothing defaults. 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 fa782fba51ee..9c5d0f73db67 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1186,4 +1186,23 @@ static inline bool arch_has_pfn_modify_check(void) #define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) #endif +/* + * p?d_large() - 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_large +#define pgd_large(x) 0 +#endif +#ifndef p4d_large +#define p4d_large(x) 0 +#endif +#ifndef pud_large +#define pud_large(x) 0 +#endif +#ifndef pmd_large +#define pmd_large(x) 0 +#endif + #endif /* _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:[~2019-03-26 16:27 UTC|newest] Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-26 16:26 [PATCH v6 00/19] Convert x86 & arm64 to use generic page walk Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 01/19] arc: mm: Add p?d_large() definitions Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 02/19] arm64: " Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 03/19] mips: " Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 04/19] powerpc: " Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:58 ` Christophe Leroy 2019-03-26 16:58 ` Christophe Leroy 2019-03-26 16:58 ` Christophe Leroy 2019-03-26 16:58 ` Christophe Leroy 2019-03-28 11:00 ` Steven Price 2019-03-28 11:00 ` Steven Price 2019-03-28 11:00 ` Steven Price 2019-03-28 11:00 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 05/19] riscv: " Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 06/19] s390: " Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 07/19] sparc: " Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 08/19] x86: " Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` Steven Price [this message] 2019-03-26 16:26 ` [PATCH v6 09/19] mm: Add generic p?d_large() macros Steven Price 2019-03-26 16:26 ` [PATCH v6 10/19] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 11/19] mm: pagewalk: Allow walking without vma Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 12/19] mm: pagewalk: Add test_p?d callbacks Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 13/19] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 14/19] x86: mm: Don't display pages which aren't present in debugfs Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 15/19] x86: mm: Point to struct seq_file from struct pg_state Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 16/19] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 17/19] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 18/19] x86: mm: Convert ptdump_walk_pgd_level_core() " Steven Price 2019-03-26 16:26 ` Steven Price 2019-03-26 16:26 ` [PATCH v6 19/19] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price 2019-03-26 16:26 ` Steven Price
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