From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f69.google.com (mail-pg0-f69.google.com [74.125.83.69]) by kanga.kvack.org (Postfix) with ESMTP id D8FA36B026F for ; Thu, 8 Dec 2016 11:22:26 -0500 (EST) Received: by mail-pg0-f69.google.com with SMTP id x23so174889879pgx.6 for ; Thu, 08 Dec 2016 08:22:26 -0800 (PST) Received: from mga07.intel.com (mga07.intel.com. [134.134.136.100]) by mx.google.com with ESMTPS id 71si29425514pgb.147.2016.12.08.08.22.25 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 08 Dec 2016 08:22:25 -0800 (PST) From: "Kirill A. Shutemov" Subject: [RFC, PATCHv1 06/28] x86: basic changes into headers for 5-level paging Date: Thu, 8 Dec 2016 19:21:28 +0300 Message-Id: <20161208162150.148763-8-kirill.shutemov@linux.intel.com> In-Reply-To: <20161208162150.148763-1-kirill.shutemov@linux.intel.com> References: <20161208162150.148763-1-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , Arnd Bergmann , "H. Peter Anvin" Cc: Andi Kleen , Dave Hansen , Andy Lutomirski , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" This patch extends x86 headers to enable 5-level paging support. It's still based on . We will get to the point where we can have later. Signed-off-by: Kirill A. Shutemov --- arch/x86/include/asm/pgtable-2level_types.h | 1 + arch/x86/include/asm/pgtable-3level_types.h | 1 + arch/x86/include/asm/pgtable.h | 16 +++++++++++++++ arch/x86/include/asm/pgtable_64_types.h | 1 + arch/x86/include/asm/pgtable_types.h | 30 ++++++++++++++++++++++++++++- 5 files changed, 48 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/pgtable-2level_types.h b/arch/x86/include/asm/pgtable-2level_types.h index 392576433e77..373ab1de909f 100644 --- a/arch/x86/include/asm/pgtable-2level_types.h +++ b/arch/x86/include/asm/pgtable-2level_types.h @@ -7,6 +7,7 @@ typedef unsigned long pteval_t; typedef unsigned long pmdval_t; typedef unsigned long pudval_t; +typedef unsigned long p4dval_t; typedef unsigned long pgdval_t; typedef unsigned long pgprotval_t; diff --git a/arch/x86/include/asm/pgtable-3level_types.h b/arch/x86/include/asm/pgtable-3level_types.h index bcc89625ebe5..b8a4341faafa 100644 --- a/arch/x86/include/asm/pgtable-3level_types.h +++ b/arch/x86/include/asm/pgtable-3level_types.h @@ -7,6 +7,7 @@ typedef u64 pteval_t; typedef u64 pmdval_t; typedef u64 pudval_t; +typedef u64 p4dval_t; typedef u64 pgdval_t; typedef u64 pgprotval_t; diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 437feb436efa..54b6632723d5 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -168,6 +168,17 @@ static inline unsigned long pud_pfn(pud_t pud) return (pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT; } +static inline unsigned long p4d_pfn(p4d_t p4d) +{ + return (p4d_val(p4d) & p4d_pfn_mask(p4d)) >> PAGE_SHIFT; +} + +static inline int p4d_large(p4d_t p4d) +{ + /* No 512 GiB pages yet */ + return 0; +} + #define pte_page(pte) pfn_to_page(pte_pfn(pte)) static inline int pmd_large(pmd_t pte) @@ -660,6 +671,11 @@ static inline int pud_large(pud_t pud) } #endif /* CONFIG_PGTABLE_LEVELS > 2 */ +static inline unsigned long p4d_index(unsigned long address) +{ + return (address >> P4D_SHIFT) & (PTRS_PER_P4D - 1); +} + #if CONFIG_PGTABLE_LEVELS > 3 static inline int pgd_present(pgd_t pgd) { diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h index 6fdef9eef2d5..d15ca53bd462 100644 --- a/arch/x86/include/asm/pgtable_64_types.h +++ b/arch/x86/include/asm/pgtable_64_types.h @@ -13,6 +13,7 @@ typedef unsigned long pteval_t; typedef unsigned long pmdval_t; typedef unsigned long pudval_t; +typedef unsigned long p4dval_t; typedef unsigned long pgdval_t; typedef unsigned long pgprotval_t; diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h index 3187bec1b79a..4aa91e440b4a 100644 --- a/arch/x86/include/asm/pgtable_types.h +++ b/arch/x86/include/asm/pgtable_types.h @@ -272,9 +272,20 @@ static inline pgdval_t pgd_flags(pgd_t pgd) return native_pgd_val(pgd) & PTE_FLAGS_MASK; } -#if CONFIG_PGTABLE_LEVELS > 3 +#if CONFIG_PGTABLE_LEVELS > 4 + +#error FIXME + +#else #include +static inline p4dval_t native_p4d_val(p4d_t p4d) +{ + return native_pgd_val(p4d); +} +#endif + +#if CONFIG_PGTABLE_LEVELS > 3 typedef struct { pudval_t pud; } pud_t; static inline pud_t native_make_pud(pmdval_t val) @@ -318,6 +329,22 @@ static inline pmdval_t native_pmd_val(pmd_t pmd) } #endif +static inline p4dval_t p4d_pfn_mask(p4d_t p4d) +{ + /* No 512 GiB huge pages yet */ + return PTE_PFN_MASK; +} + +static inline p4dval_t p4d_flags_mask(p4d_t p4d) +{ + return ~p4d_pfn_mask(p4d); +} + +static inline p4dval_t p4d_flags(p4d_t p4d) +{ + return native_p4d_val(p4d) & p4d_flags_mask(p4d); +} + static inline pudval_t pud_pfn_mask(pud_t pud) { if (native_pud_val(pud) & _PAGE_PSE) @@ -463,6 +490,7 @@ enum pg_level { PG_LEVEL_4K, PG_LEVEL_2M, PG_LEVEL_1G, + PG_LEVEL_512G, PG_LEVEL_NUM }; -- 2.10.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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