From patchwork Thu May 6 09:50:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 12241939 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E01FEC433ED for ; Thu, 6 May 2021 09:53:13 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5410361168 for ; Thu, 6 May 2021 09:53:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5410361168 Authentication-Results: mail.kernel.org; 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Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1leaeb-005vUh-MA for linux-arm-kernel@lists.infradead.org; Thu, 06 May 2021 09:50:47 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 08BD2611ED; Thu, 6 May 2021 09:50:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620294645; bh=iQwZuEmJ1pt81L9WjosFhK25XrXGHNOQNnX/Izxb9hY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tYWki1qSqJSKLYx4YuaWWQNnoMtnk6L7WjR2rVBmed6l3j3v0ijAblYXrFhYVkdnK MKMXdDqYPLNUmETbwBfQGQwmk7X84/6SwNiRYrRIlFxQHDg6E9NQatqmUDue7QEI5p hYGofydRImCmfe+lodpfLsQaRrTZ4j+NCXaeUpi4R/T1iUG8jyqUQn37ytmKFLXL0/ Ck9DkMkz+jjasYb6UwYQq5DOafyx1gXuayLGOt4uHV7Vej8nheM9ioWcJ/AzhwA/S6 PuQubIYoNMGZWPWf2vg23HQnYlBmA3rUhvo4wtMypWuC9P0oxDEqSOwxpzeM7OrO9w MNLotsVlU8chw== From: Will Deacon To: linux-arm-kernel@lists.infradead.org Cc: Will Deacon , Christoph Hellwig , Catalin Marinas , Ard Biesheuvel , Lorenzo Pieralisi Subject: [PATCH 1/3] arm64: mm: Remove unused support for Device-GRE memory type Date: Thu, 6 May 2021 10:50:32 +0100 Message-Id: <20210506095034.15246-2-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210506095034.15246-1-will@kernel.org> References: <20210506095034.15246-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210506_025045_770002_D3569A1F X-CRM114-Status: GOOD ( 11.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Device-GRE memory type is unused, so remove it and reclaim a MAIR. Cc: Christoph Hellwig Suggested-by: Catalin Marinas Link: https://lore.kernel.org/r/20210505180228.GA3874@arm.com Signed-off-by: Will Deacon Acked-by: Catalin Marinas --- arch/arm64/include/asm/memory.h | 1 - arch/arm64/include/asm/sysreg.h | 1 - arch/arm64/mm/proc.S | 1 - arch/arm64/mm/ptdump.c | 4 ---- 4 files changed, 7 deletions(-) diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 15018dc59554..ea268be37ea2 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -138,7 +138,6 @@ #define MT_NORMAL_WT 3 #define MT_DEVICE_nGnRnE 4 #define MT_DEVICE_nGnRE 5 -#define MT_DEVICE_GRE 6 /* * Memory types for Stage-2 translation diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index b31ac5ccc8ab..aa8e53dd8686 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -651,7 +651,6 @@ /* MAIR_ELx memory attributes (used by Linux) */ #define MAIR_ATTR_DEVICE_nGnRnE UL(0x00) #define MAIR_ATTR_DEVICE_nGnRE UL(0x04) -#define MAIR_ATTR_DEVICE_GRE UL(0x0c) #define MAIR_ATTR_NORMAL_NC UL(0x44) #define MAIR_ATTR_NORMAL_WT UL(0xbb) #define MAIR_ATTR_NORMAL_TAGGED UL(0xf0) diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 0a48191534ff..be6e5d1e3673 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -58,7 +58,6 @@ #define MAIR_EL1_SET \ (MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRnE, MT_DEVICE_nGnRnE) | \ MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRE, MT_DEVICE_nGnRE) | \ - MAIR_ATTRIDX(MAIR_ATTR_DEVICE_GRE, MT_DEVICE_GRE) | \ MAIR_ATTRIDX(MAIR_ATTR_NORMAL_NC, MT_NORMAL_NC) | \ MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL) | \ MAIR_ATTRIDX(MAIR_ATTR_NORMAL_WT, MT_NORMAL_WT) | \ diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c index a1937dfff31c..1c403536c9bb 100644 --- a/arch/arm64/mm/ptdump.c +++ b/arch/arm64/mm/ptdump.c @@ -157,10 +157,6 @@ static const struct prot_bits pte_bits[] = { .mask = PTE_ATTRINDX_MASK, .val = PTE_ATTRINDX(MT_DEVICE_nGnRE), .set = "DEVICE/nGnRE", - }, { - .mask = PTE_ATTRINDX_MASK, - .val = PTE_ATTRINDX(MT_DEVICE_GRE), - .set = "DEVICE/GRE", }, { .mask = PTE_ATTRINDX_MASK, .val = PTE_ATTRINDX(MT_NORMAL_NC), From patchwork Thu May 6 09:50:33 2021 Content-Type: text/plain; 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Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1leaed-005vUz-Ck for linux-arm-kernel@lists.infradead.org; Thu, 06 May 2021 09:50:48 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id B85D561207; Thu, 6 May 2021 09:50:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620294647; bh=t672HeVht4NsOOzQN9cFgQ+XFQAwfOyHO0c/I4CsQF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FWbOK0kH0k13ys8U3dQf+yWXja5M/1BLhQ9pg//PXiC9Ixh0bAjx6WFx0GQOMYOYC 93jUeE3DWR1G9Ble2nPSPdhQ5IAy45HouLPjp//YYVxu3zCep9pRTo3NeedJvwzWz9 1xrCIgpU2NUSHzQ82D4ho++sToxS7SJItEggia4GPqVIlnaST0z7cIocLGh1BZ88zG Xfj8uztUI4yKeUOl5W0k1kD8PDBSXShOtX8Y6xmWMZVs42UNfp/8tW59LvauftPbV+ lSScAeqtSn9MmmVRcqduRUSmOuc5tfi8J/r/NHRNlD289ilbsySxJ1wLTSF8rzu28l t7+3dnWB9INsw== From: Will Deacon To: linux-arm-kernel@lists.infradead.org Cc: Will Deacon , Christoph Hellwig , Catalin Marinas , Ard Biesheuvel , Lorenzo Pieralisi Subject: [PATCH 2/3] arm64: acpi: Map EFI_MEMORY_WT memory as Normal-NC Date: Thu, 6 May 2021 10:50:33 +0100 Message-Id: <20210506095034.15246-3-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210506095034.15246-1-will@kernel.org> References: <20210506095034.15246-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210506_025047_472670_7358C864 X-CRM114-Status: GOOD ( 13.34 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The only user we have of Normal Write-Through memory is in the ACPI code when mapping memory regions advertised as EFI_MEMORY_WT. Since most (all?) CPUs treat write-through as non-cacheable under the hood, don't bother with the extra memory type here and just treat EFI_MEMORY_WT the same way as EFI_MEMORY_WC by mapping it to the Normal-NC memory type instead. Cc: Ard Biesheuvel Cc: Lorenzo Pieralisi Cc: Christoph Hellwig Signed-off-by: Will Deacon Acked-by: Ard Biesheuvel Acked-by: Catalin Marinas --- arch/arm64/kernel/acpi.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index cada0b816c8a..aca5ee2a9e64 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -246,7 +246,7 @@ pgprot_t __acpi_get_mem_attribute(phys_addr_t addr) * types" of UEFI 2.5 section 2.3.6.1, each EFI memory type is * mapped to a corresponding MAIR attribute encoding. * The EFI memory attribute advises all possible capabilities - * of a memory region. We use the most efficient capability. + * of a memory region. */ u64 attr; @@ -254,9 +254,7 @@ pgprot_t __acpi_get_mem_attribute(phys_addr_t addr) attr = efi_mem_attributes(addr); if (attr & EFI_MEMORY_WB) return PAGE_KERNEL; - if (attr & EFI_MEMORY_WT) - return __pgprot(PROT_NORMAL_WT); - if (attr & EFI_MEMORY_WC) + if (attr & (EFI_MEMORY_WC | EFI_MEMORY_WT)) return __pgprot(PROT_NORMAL_NC); return __pgprot(PROT_DEVICE_nGnRnE); } @@ -340,9 +338,7 @@ void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) default: if (region->attribute & EFI_MEMORY_WB) prot = PAGE_KERNEL; - else if (region->attribute & EFI_MEMORY_WT) - prot = __pgprot(PROT_NORMAL_WT); - else if (region->attribute & EFI_MEMORY_WC) + else if (region->attribute & (EFI_MEMORY_WC | EFI_MEMORY_WT)) prot = __pgprot(PROT_NORMAL_NC); } } From patchwork Thu May 6 09:50:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 12241943 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A71FC433B4 for ; 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bh=bHV8GpScfHZut0oW11coa85Q2c+IfdylezlUEFcSPNA=; b=Zz2DmjNkw7134DfaUfeMk0x3CJ kiaHGNCDZGd+LXl+hzhY3b9qMoomH3g2IbPToAzjllZQkMDYdCiLuTpuj34vZYzvezMQADtFE+0t/ DSi1bY9E+6E1Dxi8BNMKlpD3hofSLUQmeIZM1RVsIDuqpwsZUQY9MP+gdDznTcGk0rM8YxQutW0Qq r+5HpapUZ3fPXFG5Ei7L7hxtttnOT+dDgYlouBRyA8k4BnF3QO76DOWZpGnkQ3WDooNnTmjBE11L+ pkQquMdWmrpM1YNslxj+kOy2LXWSnkC7kLD6D0UQagITIhgo/iWEX2jEMO5Z1xGgdDjR4bawnY5Uk bD/+j2iA==; Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1leaee-005vVG-W4 for linux-arm-kernel@lists.infradead.org; Thu, 06 May 2021 09:50:50 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 70E9C61177; Thu, 6 May 2021 09:50:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620294648; bh=pgi5k6JBEhRGqmgI31o5P4Ecy/7RG2LiMHJjxgYJZms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=trqFj3Gkw93d/8ZiQ7LwvcuvXSvpAwvPm41PR8lvkEdK0pz6MeAp1LnQ/Ks412oVN ikL4PNqBSoOvTRDfozHNwYJwT0ADxJPVGMi1x6mNB2zzjmTw50Qe7KEy9Y+dL0XPup biLL9kay3rVwRuz9KEYc7qX6IPshco8e3Xj2mh8IPCxBWnrJ6AlPzbta19JCKHN7d5 Pc/LZljsGZCuYOZmGZYFSs0YDMNur03BGD3peay+LjmkrXTYh7u3qwlb5iEpoKJzh/ niXF9G2NsnOyYuMaL74Oj4sumWhE2tNcC2CZBBnOdP2woD+DpZiHRj8QooXP3ETZ2B Uz1qiW64pjNuw== From: Will Deacon To: linux-arm-kernel@lists.infradead.org Cc: Will Deacon , Christoph Hellwig , Catalin Marinas , Ard Biesheuvel , Lorenzo Pieralisi Subject: [PATCH 3/3] arm64: mm: Remove unused support for Normal-WT memory type Date: Thu, 6 May 2021 10:50:34 +0100 Message-Id: <20210506095034.15246-4-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210506095034.15246-1-will@kernel.org> References: <20210506095034.15246-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210506_025049_094288_688FBE0C X-CRM114-Status: GOOD ( 11.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Normal-WT memory type is unused, so remove it and reclaim a MAIR. Cc: Christoph Hellwig Signed-off-by: Will Deacon Acked-by: Catalin Marinas --- arch/arm64/include/asm/memory.h | 5 ++--- arch/arm64/include/asm/pgtable-prot.h | 1 - arch/arm64/include/asm/sysreg.h | 1 - arch/arm64/mm/proc.S | 1 - 4 files changed, 2 insertions(+), 6 deletions(-) diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index ea268be37ea2..865fa2ab51b2 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -135,9 +135,8 @@ #define MT_NORMAL 0 #define MT_NORMAL_TAGGED 1 #define MT_NORMAL_NC 2 -#define MT_NORMAL_WT 3 -#define MT_DEVICE_nGnRnE 4 -#define MT_DEVICE_nGnRE 5 +#define MT_DEVICE_nGnRnE 3 +#define MT_DEVICE_nGnRE 4 /* * Memory types for Stage-2 translation diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h index fab2f573f7a4..8923c9b119ae 100644 --- a/arch/arm64/include/asm/pgtable-prot.h +++ b/arch/arm64/include/asm/pgtable-prot.h @@ -55,7 +55,6 @@ extern bool arm64_use_ng_mappings; #define PROT_DEVICE_nGnRnE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRnE)) #define PROT_DEVICE_nGnRE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRE)) #define PROT_NORMAL_NC (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_NC)) -#define PROT_NORMAL_WT (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_WT)) #define PROT_NORMAL (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL)) #define PROT_NORMAL_TAGGED (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_TAGGED)) diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index aa8e53dd8686..ec27455d2a44 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -652,7 +652,6 @@ #define MAIR_ATTR_DEVICE_nGnRnE UL(0x00) #define MAIR_ATTR_DEVICE_nGnRE UL(0x04) #define MAIR_ATTR_NORMAL_NC UL(0x44) -#define MAIR_ATTR_NORMAL_WT UL(0xbb) #define MAIR_ATTR_NORMAL_TAGGED UL(0xf0) #define MAIR_ATTR_NORMAL UL(0xff) #define MAIR_ATTR_MASK UL(0xff) diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index be6e5d1e3673..c2d57eb0e671 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -60,7 +60,6 @@ MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRE, MT_DEVICE_nGnRE) | \ MAIR_ATTRIDX(MAIR_ATTR_NORMAL_NC, MT_NORMAL_NC) | \ MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL) | \ - MAIR_ATTRIDX(MAIR_ATTR_NORMAL_WT, MT_NORMAL_WT) | \ MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL_TAGGED)) #ifdef CONFIG_CPU_PM