From patchwork Fri Nov 22 01:40:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alistair Popple X-Patchwork-Id: 13882657 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2071.outbound.protection.outlook.com [40.107.243.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B457168483; Fri, 22 Nov 2024 01:43:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.243.71 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732239791; cv=fail; b=NFxpojHL1rS2ncoOtb+AGu1LXNUUmjqU4+083QgV3cHxSnziT7nCx4dJ4KKHo6MijcXd8LjW2yF2NP/S6YgRsuAIe2LVIeTkJS523UE0zsyR/GDQ/x8X1WXb0ukjRvdXxM1dan9FoIHZnDgVrSz1P1DuvmMk8enBmTGVtu9UfV8= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732239791; c=relaxed/simple; bh=EbBLhX82VnDygAgn7lcB/AlEHQk5g0SDfbY9SI6srvQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=Kl1f2MRJ9kJ5GhJTMiRPW1Sr9rRfAPatkJySjfKzD1eGY0sGF1IDEzWFWOOxxX/alls3U1LZi2eXzH3/yPyYMDwZlJzJrSd8TkY8YA/wiw+DKH9h/L8dsa2sxb9sojrJDVK5JSMcOR4ijXu+0WLGWERTAXYLayLWfFuaZDIyKqo= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=eh75kw0W; arc=fail smtp.client-ip=40.107.243.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="eh75kw0W" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=tnoYf/B/xkIv1ENLsqgtDwJCqT3+eZ3tStkQGSDZDpzlk7ODBryvUJds2R2byoZwhOftLFYfouDTJVGeEZ47vNmbff0yCOnIZWjZ29n5CokPUtu7iAhwdufh/QTAe+FvSP5P2pFkWWW/KF06gl3aQm8XRxXufadL+uL6Zgwv7xa4yzDwtQivZetSIJqEyrh+iAleNBtgMAc6Io+lSuGClshFomZJm/tlXEUKK6tPoZ8i1bV0dYmNXDZIgDXDFKOvN27m27T9+E/YjA1Q6yLPneYOcb6RgRIa4TcGTKW+DQfPV0QDwrelYSjMowjAgRlwIA/akQV6GNqzRXMALLhkMQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=NJ03nN5uTvXFVD/nas8UfoAyyB+o+5aCpG21hhkqAN4=; b=gMBiIBbAJC5ZqPQS2dK4K4DNDeFFbqtItjUcRFSLWHuVmE27NVotlsfzqXkMMNfqsgJeZxMw8U7U9gn/AKTMZfoLMtHqXWo6Sk0DYSqz10zGSKm6Go+2vIJInrs7HuNVvbjcLIRb3YAZi5o7MZBXYTQHl7gzLvKcEJdQH9J5U0FnNmOpMzE2qtqgmA8cvfctWounVvzEoX8NvZGSqWWwRyQgJRGM0A7fVkibzwepL4hZmEvAEPjJiMAWwYByZE4QxaU4KnWG4CRIZYLk/h+J3j+NHWg81z7CR5ioTcXop+1s/Hr+V1SU8UaOiG1AxEVYeH64WshgUAt9JKPtfceSyA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=NJ03nN5uTvXFVD/nas8UfoAyyB+o+5aCpG21hhkqAN4=; b=eh75kw0Wj/Q7j9AHfYCgUT57lCYNi+8IJP0sYdjFg9BuzBAar9yoF/Mx65MsTV2j/wC87yLZ5mh/13/ubq9hrWr1JC2NcU78rnRPsWx+UYenGn8a+S0JfX2R9oF48dktISQAl5h6NSuen4450WtwHwIvUPVU+R8cRnh7mtEvFN6J1PBqiXjHzaPf8z1dXlvPCBgsAHYmc3h5fHmvCBEz8FX2uyKuGL0XFi9VD14zxYnnuG9pWHcCdUaDgo5QvDgo9tjUpHqCI1XH17JWs/FsyZfCf2TAW4TVrRDtat5Sf7Np6kvqzok9Cn9uB6gZt4NkdmJagCp2qEsFGAulZhzfIw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from DS0PR12MB7726.namprd12.prod.outlook.com (2603:10b6:8:130::6) by BY5PR12MB4131.namprd12.prod.outlook.com (2603:10b6:a03:212::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8158.24; Fri, 22 Nov 2024 01:43:05 +0000 Received: from DS0PR12MB7726.namprd12.prod.outlook.com ([fe80::953f:2f80:90c5:67fe]) by DS0PR12MB7726.namprd12.prod.outlook.com ([fe80::953f:2f80:90c5:67fe%4]) with mapi id 15.20.8182.016; Fri, 22 Nov 2024 01:43:04 +0000 From: Alistair Popple To: dan.j.williams@intel.com, linux-mm@kvack.org Cc: Alistair Popple , lina@asahilina.net, zhang.lyra@gmail.com, gerald.schaefer@linux.ibm.com, vishal.l.verma@intel.com, dave.jiang@intel.com, logang@deltatee.com, bhelgaas@google.com, jack@suse.cz, jgg@ziepe.ca, catalin.marinas@arm.com, will@kernel.org, mpe@ellerman.id.au, npiggin@gmail.com, dave.hansen@linux.intel.com, ira.weiny@intel.com, willy@infradead.org, djwong@kernel.org, tytso@mit.edu, linmiaohe@huawei.com, david@redhat.com, peterx@redhat.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, jhubbard@nvidia.com, hch@lst.de, david@fromorbit.com Subject: [PATCH v3 24/25] mm: Remove devmap related functions and page table bits Date: Fri, 22 Nov 2024 12:40:45 +1100 Message-ID: <4c978d98e9082062e3d6d1195630501a62ee1d6a.1732239628.git-series.apopple@nvidia.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: References: X-ClientProxiedBy: SYCP282CA0002.AUSP282.PROD.OUTLOOK.COM (2603:10c6:10:80::14) To DS0PR12MB7726.namprd12.prod.outlook.com (2603:10b6:8:130::6) Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR12MB7726:EE_|BY5PR12MB4131:EE_ X-MS-Office365-Filtering-Correlation-Id: 51f97d95-fdf3-40ea-9517-08dd0a9701ed X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|1800799024|366016; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS0PR12MB7726.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(7416014)(1800799024)(366016);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 51f97d95-fdf3-40ea-9517-08dd0a9701ed X-MS-Exchange-CrossTenant-AuthSource: DS0PR12MB7726.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Nov 2024 01:43:04.8316 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: +BDpavGxlHHDL7Ricjy8e6GUn5Rfxe0yAHc9exGMqGzwfXTCAHoO/54aMN4RIY5WSkr7DYXP/amAxdKCfCWOSw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4131 Now that DAX and all other reference counts to ZONE_DEVICE pages are managed normally there is no need for the special devmap PTE/PMD/PUD page table bits. So drop all references to these, freeing up a software defined page table bit on architectures supporting it. Signed-off-by: Alistair Popple Acked-by: Will Deacon # arm64 --- Documentation/mm/arch_pgtable_helpers.rst | 6 +-- arch/arm64/Kconfig | 1 +- arch/arm64/include/asm/pgtable-prot.h | 1 +- arch/arm64/include/asm/pgtable.h | 24 +-------- arch/powerpc/Kconfig | 1 +- arch/powerpc/include/asm/book3s/64/hash-4k.h | 6 +-- arch/powerpc/include/asm/book3s/64/hash-64k.h | 7 +-- arch/powerpc/include/asm/book3s/64/pgtable.h | 52 +------------------ arch/powerpc/include/asm/book3s/64/radix.h | 14 +----- arch/x86/Kconfig | 1 +- arch/x86/include/asm/pgtable.h | 51 +----------------- arch/x86/include/asm/pgtable_types.h | 5 +-- include/linux/mm.h | 7 +-- include/linux/pfn_t.h | 20 +------- include/linux/pgtable.h | 19 +------ mm/Kconfig | 4 +- mm/debug_vm_pgtable.c | 59 +-------------------- mm/hmm.c | 3 +- 18 files changed, 11 insertions(+), 270 deletions(-) diff --git a/Documentation/mm/arch_pgtable_helpers.rst b/Documentation/mm/arch_pgtable_helpers.rst index af24516..c88c7fa 100644 --- a/Documentation/mm/arch_pgtable_helpers.rst +++ b/Documentation/mm/arch_pgtable_helpers.rst @@ -30,8 +30,6 @@ PTE Page Table Helpers +---------------------------+--------------------------------------------------+ | pte_protnone | Tests a PROT_NONE PTE | +---------------------------+--------------------------------------------------+ -| pte_devmap | Tests a ZONE_DEVICE mapped PTE | -+---------------------------+--------------------------------------------------+ | pte_soft_dirty | Tests a soft dirty PTE | +---------------------------+--------------------------------------------------+ | pte_swp_soft_dirty | Tests a soft dirty swapped PTE | @@ -104,8 +102,6 @@ PMD Page Table Helpers +---------------------------+--------------------------------------------------+ | pmd_protnone | Tests a PROT_NONE PMD | +---------------------------+--------------------------------------------------+ -| pmd_devmap | Tests a ZONE_DEVICE mapped PMD | -+---------------------------+--------------------------------------------------+ | pmd_soft_dirty | Tests a soft dirty PMD | +---------------------------+--------------------------------------------------+ | pmd_swp_soft_dirty | Tests a soft dirty swapped PMD | @@ -177,8 +173,6 @@ PUD Page Table Helpers +---------------------------+--------------------------------------------------+ | pud_write | Tests a writable PUD | +---------------------------+--------------------------------------------------+ -| pud_devmap | Tests a ZONE_DEVICE mapped PUD | -+---------------------------+--------------------------------------------------+ | pud_mkyoung | Creates a young PUD | +---------------------------+--------------------------------------------------+ | pud_mkold | Creates an old PUD | diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index fd9df6d..1d90ab9 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -38,7 +38,6 @@ config ARM64 select ARCH_HAS_MEM_ENCRYPT select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE - select ARCH_HAS_PTE_DEVMAP select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_HW_PTE_YOUNG select ARCH_HAS_SETUP_DMA_OPS diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h index 2a11d0c..f7e12d6 100644 --- a/arch/arm64/include/asm/pgtable-prot.h +++ b/arch/arm64/include/asm/pgtable-prot.h @@ -17,7 +17,6 @@ #define PTE_SWP_EXCLUSIVE (_AT(pteval_t, 1) << 2) /* only for swp ptes */ #define PTE_DIRTY (_AT(pteval_t, 1) << 55) #define PTE_SPECIAL (_AT(pteval_t, 1) << 56) -#define PTE_DEVMAP (_AT(pteval_t, 1) << 57) /* * PTE_PRESENT_INVALID=1 & PTE_VALID=0 indicates that the pte's fields should be diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index c329ea0..07a252b 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -108,7 +108,6 @@ static inline pteval_t __phys_to_pte_val(phys_addr_t phys) #define pte_user(pte) (!!(pte_val(pte) & PTE_USER)) #define pte_user_exec(pte) (!(pte_val(pte) & PTE_UXN)) #define pte_cont(pte) (!!(pte_val(pte) & PTE_CONT)) -#define pte_devmap(pte) (!!(pte_val(pte) & PTE_DEVMAP)) #define pte_tagged(pte) ((pte_val(pte) & PTE_ATTRINDX_MASK) == \ PTE_ATTRINDX(MT_NORMAL_TAGGED)) @@ -291,11 +290,6 @@ static inline pmd_t pmd_mkcont(pmd_t pmd) return __pmd(pmd_val(pmd) | PMD_SECT_CONT); } -static inline pte_t pte_mkdevmap(pte_t pte) -{ - return set_pte_bit(pte, __pgprot(PTE_DEVMAP | PTE_SPECIAL)); -} - #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP static inline int pte_uffd_wp(pte_t pte) { @@ -593,14 +587,6 @@ static inline int pmd_trans_huge(pmd_t pmd) #define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT)) -#ifdef CONFIG_TRANSPARENT_HUGEPAGE -#define pmd_devmap(pmd) pte_devmap(pmd_pte(pmd)) -#endif -static inline pmd_t pmd_mkdevmap(pmd_t pmd) -{ - return pte_pmd(set_pte_bit(pmd_pte(pmd), __pgprot(PTE_DEVMAP))); -} - #ifdef CONFIG_ARCH_SUPPORTS_PMD_PFNMAP #define pmd_special(pte) (!!((pmd_val(pte) & PTE_SPECIAL))) static inline pmd_t pmd_mkspecial(pmd_t pmd) @@ -1190,16 +1176,6 @@ static inline int pmdp_set_access_flags(struct vm_area_struct *vma, return __ptep_set_access_flags(vma, address, (pte_t *)pmdp, pmd_pte(entry), dirty); } - -static inline int pud_devmap(pud_t pud) -{ - return 0; -} - -static inline int pgd_devmap(pgd_t pgd) -{ - return 0; -} #endif #ifdef CONFIG_PAGE_TABLE_CHECK diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 8094a01..c50136f 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -145,7 +145,6 @@ config PPC select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_PMEM_API - select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64 select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 select ARCH_HAS_SET_MEMORY diff --git a/arch/powerpc/include/asm/book3s/64/hash-4k.h b/arch/powerpc/include/asm/book3s/64/hash-4k.h index c3efaca..b0546d3 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-4k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-4k.h @@ -160,12 +160,6 @@ extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm, extern int hash__has_transparent_hugepage(void); #endif -static inline pmd_t hash__pmd_mkdevmap(pmd_t pmd) -{ - BUG(); - return pmd; -} - #endif /* !__ASSEMBLY__ */ #endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */ diff --git a/arch/powerpc/include/asm/book3s/64/hash-64k.h b/arch/powerpc/include/asm/book3s/64/hash-64k.h index 0bf6fd0..0fb5b7d 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-64k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-64k.h @@ -259,7 +259,7 @@ static inline void mark_hpte_slot_valid(unsigned char *hpte_slot_array, */ static inline int hash__pmd_trans_huge(pmd_t pmd) { - return !!((pmd_val(pmd) & (_PAGE_PTE | H_PAGE_THP_HUGE | _PAGE_DEVMAP)) == + return !!((pmd_val(pmd) & (_PAGE_PTE | H_PAGE_THP_HUGE)) == (_PAGE_PTE | H_PAGE_THP_HUGE)); } @@ -281,11 +281,6 @@ extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm, extern int hash__has_transparent_hugepage(void); #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ -static inline pmd_t hash__pmd_mkdevmap(pmd_t pmd) -{ - return __pmd(pmd_val(pmd) | (_PAGE_PTE | H_PAGE_THP_HUGE | _PAGE_DEVMAP)); -} - #endif /* __ASSEMBLY__ */ #endif /* _ASM_POWERPC_BOOK3S_64_HASH_64K_H */ diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index 6d98e6f..bda0649 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -88,7 +88,6 @@ #define _PAGE_SOFT_DIRTY _RPAGE_SW3 /* software: software dirty tracking */ #define _PAGE_SPECIAL _RPAGE_SW2 /* software: special page */ -#define _PAGE_DEVMAP _RPAGE_SW1 /* software: ZONE_DEVICE page */ /* * Drivers request for cache inhibited pte mapping using _PAGE_NO_CACHE @@ -109,7 +108,7 @@ */ #define _HPAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \ _PAGE_ACCESSED | H_PAGE_THP_HUGE | _PAGE_PTE | \ - _PAGE_SOFT_DIRTY | _PAGE_DEVMAP) + _PAGE_SOFT_DIRTY) /* * user access blocked by key */ @@ -123,7 +122,7 @@ */ #define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \ _PAGE_ACCESSED | _PAGE_SPECIAL | _PAGE_PTE | \ - _PAGE_SOFT_DIRTY | _PAGE_DEVMAP) + _PAGE_SOFT_DIRTY) /* * We define 2 sets of base prot bits, one for basic pages (ie, @@ -609,24 +608,6 @@ static inline pte_t pte_mkhuge(pte_t pte) return pte; } -static inline pte_t pte_mkdevmap(pte_t pte) -{ - return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_SPECIAL | _PAGE_DEVMAP)); -} - -/* - * This is potentially called with a pmd as the argument, in which case it's not - * safe to check _PAGE_DEVMAP unless we also confirm that _PAGE_PTE is set. - * That's because the bit we use for _PAGE_DEVMAP is not reserved for software - * use in page directory entries (ie. non-ptes). - */ -static inline int pte_devmap(pte_t pte) -{ - __be64 mask = cpu_to_be64(_PAGE_DEVMAP | _PAGE_PTE); - - return (pte_raw(pte) & mask) == mask; -} - static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { /* FIXME!! check whether this need to be a conditional */ @@ -1380,35 +1361,6 @@ static inline bool arch_needs_pgtable_deposit(void) } extern void serialize_against_pte_lookup(struct mm_struct *mm); - -static inline pmd_t pmd_mkdevmap(pmd_t pmd) -{ - if (radix_enabled()) - return radix__pmd_mkdevmap(pmd); - return hash__pmd_mkdevmap(pmd); -} - -static inline pud_t pud_mkdevmap(pud_t pud) -{ - if (radix_enabled()) - return radix__pud_mkdevmap(pud); - BUG(); - return pud; -} - -static inline int pmd_devmap(pmd_t pmd) -{ - return pte_devmap(pmd_pte(pmd)); -} - -static inline int pud_devmap(pud_t pud) -{ - return pte_devmap(pud_pte(pud)); -} - -static inline int pgd_devmap(pgd_t pgd) -{ - return 0; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h index 8f55ff7..df23a82 100644 --- a/arch/powerpc/include/asm/book3s/64/radix.h +++ b/arch/powerpc/include/asm/book3s/64/radix.h @@ -264,7 +264,7 @@ static inline int radix__p4d_bad(p4d_t p4d) static inline int radix__pmd_trans_huge(pmd_t pmd) { - return (pmd_val(pmd) & (_PAGE_PTE | _PAGE_DEVMAP)) == _PAGE_PTE; + return (pmd_val(pmd) & _PAGE_PTE) == _PAGE_PTE; } static inline pmd_t radix__pmd_mkhuge(pmd_t pmd) @@ -274,7 +274,7 @@ static inline pmd_t radix__pmd_mkhuge(pmd_t pmd) static inline int radix__pud_trans_huge(pud_t pud) { - return (pud_val(pud) & (_PAGE_PTE | _PAGE_DEVMAP)) == _PAGE_PTE; + return (pud_val(pud) & _PAGE_PTE) == _PAGE_PTE; } static inline pud_t radix__pud_mkhuge(pud_t pud) @@ -315,16 +315,6 @@ static inline int radix__has_transparent_pud_hugepage(void) } #endif -static inline pmd_t radix__pmd_mkdevmap(pmd_t pmd) -{ - return __pmd(pmd_val(pmd) | (_PAGE_PTE | _PAGE_DEVMAP)); -} - -static inline pud_t radix__pud_mkdevmap(pud_t pud) -{ - return __pud(pud_val(pud) | (_PAGE_PTE | _PAGE_DEVMAP)); -} - struct vmem_altmap; struct dev_pagemap; extern int __meminit radix__vmemmap_create_mapping(unsigned long start, diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 16354df..6a1a06f 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -93,7 +93,6 @@ config X86 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PMEM_API if X86_64 - select ARCH_HAS_PTE_DEVMAP if X86_64 select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_HW_PTE_YOUNG select ARCH_HAS_NONLEAF_PMD_YOUNG if PGTABLE_LEVELS > 2 diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 4c2d080..23a993a 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -308,16 +308,15 @@ static inline bool pmd_leaf(pmd_t pte) } #ifdef CONFIG_TRANSPARENT_HUGEPAGE -/* NOTE: when predicate huge page, consider also pmd_devmap, or use pmd_leaf */ static inline int pmd_trans_huge(pmd_t pmd) { - return (pmd_val(pmd) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE; + return (pmd_val(pmd) & _PAGE_PSE) == _PAGE_PSE; } #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD static inline int pud_trans_huge(pud_t pud) { - return (pud_val(pud) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE; + return (pud_val(pud) & _PAGE_PSE) == _PAGE_PSE; } #endif @@ -327,24 +326,6 @@ static inline int has_transparent_hugepage(void) return boot_cpu_has(X86_FEATURE_PSE); } -#ifdef CONFIG_ARCH_HAS_PTE_DEVMAP -static inline int pmd_devmap(pmd_t pmd) -{ - return !!(pmd_val(pmd) & _PAGE_DEVMAP); -} - -#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD -static inline int pud_devmap(pud_t pud) -{ - return !!(pud_val(pud) & _PAGE_DEVMAP); -} -#else -static inline int pud_devmap(pud_t pud) -{ - return 0; -} -#endif - #ifdef CONFIG_ARCH_SUPPORTS_PMD_PFNMAP static inline bool pmd_special(pmd_t pmd) { @@ -368,12 +349,6 @@ static inline pud_t pud_mkspecial(pud_t pud) return pud_set_flags(pud, _PAGE_SPECIAL); } #endif /* CONFIG_ARCH_SUPPORTS_PUD_PFNMAP */ - -static inline int pgd_devmap(pgd_t pgd) -{ - return 0; -} -#endif #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ static inline pte_t pte_set_flags(pte_t pte, pteval_t set) @@ -534,11 +509,6 @@ static inline pte_t pte_mkspecial(pte_t pte) return pte_set_flags(pte, _PAGE_SPECIAL); } -static inline pte_t pte_mkdevmap(pte_t pte) -{ - return pte_set_flags(pte, _PAGE_SPECIAL|_PAGE_DEVMAP); -} - /* See comments above mksaveddirty_shift() */ static inline pmd_t pmd_mksaveddirty(pmd_t pmd) { @@ -610,11 +580,6 @@ static inline pmd_t pmd_mkwrite_shstk(pmd_t pmd) return pmd_set_flags(pmd, _PAGE_DIRTY); } -static inline pmd_t pmd_mkdevmap(pmd_t pmd) -{ - return pmd_set_flags(pmd, _PAGE_DEVMAP); -} - static inline pmd_t pmd_mkhuge(pmd_t pmd) { return pmd_set_flags(pmd, _PAGE_PSE); @@ -680,11 +645,6 @@ static inline pud_t pud_mkdirty(pud_t pud) return pud_mksaveddirty(pud); } -static inline pud_t pud_mkdevmap(pud_t pud) -{ - return pud_set_flags(pud, _PAGE_DEVMAP); -} - static inline pud_t pud_mkhuge(pud_t pud) { return pud_set_flags(pud, _PAGE_PSE); @@ -1012,13 +972,6 @@ static inline int pte_present(pte_t a) return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); } -#ifdef CONFIG_ARCH_HAS_PTE_DEVMAP -static inline int pte_devmap(pte_t a) -{ - return (pte_flags(a) & _PAGE_DEVMAP) == _PAGE_DEVMAP; -} -#endif - #define pte_accessible pte_accessible static inline bool pte_accessible(struct mm_struct *mm, pte_t a) { diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h index 6f82e75..4a13b76 100644 --- a/arch/x86/include/asm/pgtable_types.h +++ b/arch/x86/include/asm/pgtable_types.h @@ -33,7 +33,6 @@ #define _PAGE_BIT_CPA_TEST _PAGE_BIT_SOFTW1 #define _PAGE_BIT_UFFD_WP _PAGE_BIT_SOFTW2 /* userfaultfd wrprotected */ #define _PAGE_BIT_SOFT_DIRTY _PAGE_BIT_SOFTW3 /* software dirty tracking */ -#define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4 #ifdef CONFIG_X86_64 #define _PAGE_BIT_SAVED_DIRTY _PAGE_BIT_SOFTW5 /* Saved Dirty bit */ @@ -117,11 +116,9 @@ #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) -#define _PAGE_DEVMAP (_AT(u64, 1) << _PAGE_BIT_DEVMAP) #define _PAGE_SOFTW4 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW4) #else #define _PAGE_NX (_AT(pteval_t, 0)) -#define _PAGE_DEVMAP (_AT(pteval_t, 0)) #define _PAGE_SOFTW4 (_AT(pteval_t, 0)) #endif @@ -148,7 +145,7 @@ #define _COMMON_PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ _PAGE_SPECIAL | _PAGE_ACCESSED | \ _PAGE_DIRTY_BITS | _PAGE_SOFT_DIRTY | \ - _PAGE_DEVMAP | _PAGE_CC | _PAGE_UFFD_WP) + _PAGE_CC | _PAGE_UFFD_WP) #define _PAGE_CHG_MASK (_COMMON_PAGE_CHG_MASK | _PAGE_PAT) #define _HPAGE_CHG_MASK (_COMMON_PAGE_CHG_MASK | _PAGE_PSE | _PAGE_PAT_LARGE) diff --git a/include/linux/mm.h b/include/linux/mm.h index 052f234..600a1a8 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2692,13 +2692,6 @@ static inline pud_t pud_mkspecial(pud_t pud) } #endif /* CONFIG_ARCH_SUPPORTS_PUD_PFNMAP */ -#ifndef CONFIG_ARCH_HAS_PTE_DEVMAP -static inline int pte_devmap(pte_t pte) -{ - return 0; -} -#endif - extern pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl); static inline pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr, diff --git a/include/linux/pfn_t.h b/include/linux/pfn_t.h index 2d91482..0100ad8 100644 --- a/include/linux/pfn_t.h +++ b/include/linux/pfn_t.h @@ -97,26 +97,6 @@ static inline pud_t pfn_t_pud(pfn_t pfn, pgprot_t pgprot) #endif #endif -#ifdef CONFIG_ARCH_HAS_PTE_DEVMAP -static inline bool pfn_t_devmap(pfn_t pfn) -{ - const u64 flags = PFN_DEV|PFN_MAP; - - return (pfn.val & flags) == flags; -} -#else -static inline bool pfn_t_devmap(pfn_t pfn) -{ - return false; -} -pte_t pte_mkdevmap(pte_t pte); -pmd_t pmd_mkdevmap(pmd_t pmd); -#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && \ - defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) -pud_t pud_mkdevmap(pud_t pud); -#endif -#endif /* CONFIG_ARCH_HAS_PTE_DEVMAP */ - #ifdef CONFIG_ARCH_HAS_PTE_SPECIAL static inline bool pfn_t_special(pfn_t pfn) { diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index fa661b2..9406de1 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -1616,21 +1616,6 @@ static inline int pud_write(pud_t pud) } #endif /* pud_write */ -#if !defined(CONFIG_ARCH_HAS_PTE_DEVMAP) || !defined(CONFIG_TRANSPARENT_HUGEPAGE) -static inline int pmd_devmap(pmd_t pmd) -{ - return 0; -} -static inline int pud_devmap(pud_t pud) -{ - return 0; -} -static inline int pgd_devmap(pgd_t pgd) -{ - return 0; -} -#endif - #if !defined(CONFIG_TRANSPARENT_HUGEPAGE) || \ !defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) static inline int pud_trans_huge(pud_t pud) @@ -1885,8 +1870,8 @@ typedef unsigned int pgtbl_mod_mask; * - It should contain a huge PFN, which points to a huge page larger than * PAGE_SIZE of the platform. The PFN format isn't important here. * - * - It should cover all kinds of huge mappings (e.g., pXd_trans_huge(), - * pXd_devmap(), or hugetlb mappings). + * - It should cover all kinds of huge mappings (i.e. pXd_trans_huge() + * or hugetlb mappings). */ #ifndef pgd_leaf #define pgd_leaf(x) false diff --git a/mm/Kconfig b/mm/Kconfig index 4c9f5ea..06f939b 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1044,9 +1044,6 @@ config ARCH_HAS_CURRENT_STACK_POINTER register alias named "current_stack_pointer", this config can be selected. -config ARCH_HAS_PTE_DEVMAP - bool - config ARCH_HAS_ZONE_DMA_SET bool @@ -1064,7 +1061,6 @@ config ZONE_DEVICE depends on MEMORY_HOTPLUG depends on MEMORY_HOTREMOVE depends on SPARSEMEM_VMEMMAP - depends on ARCH_HAS_PTE_DEVMAP select XARRAY_MULTI help diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c index bc748f7..cf5ff92 100644 --- a/mm/debug_vm_pgtable.c +++ b/mm/debug_vm_pgtable.c @@ -348,12 +348,6 @@ static void __init pud_advanced_tests(struct pgtable_debug_args *args) vaddr &= HPAGE_PUD_MASK; pud = pfn_pud(args->pud_pfn, args->page_prot); - /* - * Some architectures have debug checks to make sure - * huge pud mapping are only found with devmap entries - * For now test with only devmap entries. - */ - pud = pud_mkdevmap(pud); set_pud_at(args->mm, vaddr, args->pudp, pud); flush_dcache_page(page); pudp_set_wrprotect(args->mm, vaddr, args->pudp); @@ -366,7 +360,6 @@ static void __init pud_advanced_tests(struct pgtable_debug_args *args) WARN_ON(!pud_none(pud)); #endif /* __PAGETABLE_PMD_FOLDED */ pud = pfn_pud(args->pud_pfn, args->page_prot); - pud = pud_mkdevmap(pud); pud = pud_wrprotect(pud); pud = pud_mkclean(pud); set_pud_at(args->mm, vaddr, args->pudp, pud); @@ -384,7 +377,6 @@ static void __init pud_advanced_tests(struct pgtable_debug_args *args) #endif /* __PAGETABLE_PMD_FOLDED */ pud = pfn_pud(args->pud_pfn, args->page_prot); - pud = pud_mkdevmap(pud); pud = pud_mkyoung(pud); set_pud_at(args->mm, vaddr, args->pudp, pud); flush_dcache_page(page); @@ -693,53 +685,6 @@ static void __init pmd_protnone_tests(struct pgtable_debug_args *args) static void __init pmd_protnone_tests(struct pgtable_debug_args *args) { } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ -#ifdef CONFIG_ARCH_HAS_PTE_DEVMAP -static void __init pte_devmap_tests(struct pgtable_debug_args *args) -{ - pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot); - - pr_debug("Validating PTE devmap\n"); - WARN_ON(!pte_devmap(pte_mkdevmap(pte))); -} - -#ifdef CONFIG_TRANSPARENT_HUGEPAGE -static void __init pmd_devmap_tests(struct pgtable_debug_args *args) -{ - pmd_t pmd; - - if (!has_transparent_hugepage()) - return; - - pr_debug("Validating PMD devmap\n"); - pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot); - WARN_ON(!pmd_devmap(pmd_mkdevmap(pmd))); -} - -#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD -static void __init pud_devmap_tests(struct pgtable_debug_args *args) -{ - pud_t pud; - - if (!has_transparent_pud_hugepage()) - return; - - pr_debug("Validating PUD devmap\n"); - pud = pfn_pud(args->fixed_pud_pfn, args->page_prot); - WARN_ON(!pud_devmap(pud_mkdevmap(pud))); -} -#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */ -static void __init pud_devmap_tests(struct pgtable_debug_args *args) { } -#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */ -#else /* CONFIG_TRANSPARENT_HUGEPAGE */ -static void __init pmd_devmap_tests(struct pgtable_debug_args *args) { } -static void __init pud_devmap_tests(struct pgtable_debug_args *args) { } -#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ -#else -static void __init pte_devmap_tests(struct pgtable_debug_args *args) { } -static void __init pmd_devmap_tests(struct pgtable_debug_args *args) { } -static void __init pud_devmap_tests(struct pgtable_debug_args *args) { } -#endif /* CONFIG_ARCH_HAS_PTE_DEVMAP */ - static void __init pte_soft_dirty_tests(struct pgtable_debug_args *args) { pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot); @@ -1341,10 +1286,6 @@ static int __init debug_vm_pgtable(void) pte_protnone_tests(&args); pmd_protnone_tests(&args); - pte_devmap_tests(&args); - pmd_devmap_tests(&args); - pud_devmap_tests(&args); - pte_soft_dirty_tests(&args); pmd_soft_dirty_tests(&args); pte_swap_soft_dirty_tests(&args); diff --git a/mm/hmm.c b/mm/hmm.c index 285578e..2a12879 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -395,8 +395,7 @@ static int hmm_vma_walk_pmd(pmd_t *pmdp, return 0; } -#if defined(CONFIG_ARCH_HAS_PTE_DEVMAP) && \ - defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) +#if defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) static inline unsigned long pud_to_hmm_pfn_flags(struct hmm_range *range, pud_t pud) {