From patchwork Fri Dec 10 16:54:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joey Gouly X-Patchwork-Id: 12695618 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7F6E9C433F5 for ; Fri, 10 Dec 2021 16:57:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=KQjHSVNJk+5UTbn9IBATz/XaOfOz85NtQ7+ScuD4zM4=; b=NKjt6NQNkALRST ASEe/qp8I4RK0Cn3aR50akgwNPX1l8JQJfBTB8iMERDzbzo/7DFLNiPgWgWPT3vnFWoU3/4RpGyRx 8ZP76OuCyJ1OtSe+3/AchljQCf05fZdJCyEdYZRamV7qNymlxjIOCdldXYNzfs0/KsOXd9jlxWpKy lGWmflLXhs3b2Ul1X46sycRzevX6nf5ISIaZKESy8Nl7Fim1hl2UPud88vD03nUJjMJA7haC5pKAq uUCB8yunGaRvnNYOwwQhoa8ddG14RdI2sTrDyTdDG62Tz5J6loPXcPR5dOBdgNvcsOzi3ffK4Va37 /7WyvAw4AyvlGwiFA9MA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvjBO-002f1N-D4; Fri, 10 Dec 2021 16:55:43 +0000 Received: from mail-vi1eur05on2059.outbound.protection.outlook.com ([40.107.21.59] helo=EUR05-VI1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvjAg-002epz-Nl for linux-arm-kernel@lists.infradead.org; Fri, 10 Dec 2021 16:55:00 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=pfcz/wRaHn2k8tM0/H778pNFOIC5Wa6nOLQ3VFYVg3Y=; b=3hbmT7LMJVmZD2YeMAg5nd/m4G2U8rxBZhPbu/DKjgf11gQZmvgXDVMWqeKY7674t1YsIGezkWTBa6NTXHjPb+4F4odBIs3negZoGFLzhMum07+XyHSKgsF4jRRmBDBCTQwAhRmA3nFC9GzQ3RMdkPDWgIUZ3nAfBzA8CGCn48E= Received: from DB6PR0301CA0027.eurprd03.prod.outlook.com (2603:10a6:4:3e::37) by VI1PR0802MB2511.eurprd08.prod.outlook.com (2603:10a6:800:b1::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4755.21; Fri, 10 Dec 2021 16:54:54 +0000 Received: from DB5EUR03FT056.eop-EUR03.prod.protection.outlook.com (2603:10a6:4:3e:cafe::6) by DB6PR0301CA0027.outlook.office365.com (2603:10a6:4:3e::37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4755.22 via Frontend Transport; Fri, 10 Dec 2021 16:54:54 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 63.35.35.123) smtp.mailfrom=arm.com; dkim=pass (signature was verified) header.d=armh.onmicrosoft.com;dmarc=pass action=none header.from=arm.com; Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 63.35.35.123 as permitted sender) receiver=protection.outlook.com; client-ip=63.35.35.123; helo=64aa7808-outbound-1.mta.getcheckrecipient.com; Received: from 64aa7808-outbound-1.mta.getcheckrecipient.com (63.35.35.123) by DB5EUR03FT056.mail.protection.outlook.com (10.152.21.124) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4778.12 via Frontend Transport; Fri, 10 Dec 2021 16:54:54 +0000 Received: ("Tessian outbound de6049708a0a:v110"); Fri, 10 Dec 2021 16:54:54 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: f4a0a2056158d7e1 X-CR-MTA-TID: 64aa7808 Received: from 912efa2c9e15.1 by 64aa7808-outbound-1.mta.getcheckrecipient.com id 334CDB5B-C516-4937-AD58-271701E8DD80.1; Fri, 10 Dec 2021 16:54:47 +0000 Received: from EUR05-AM6-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id 912efa2c9e15.1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Fri, 10 Dec 2021 16:54:47 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=bij3IT9dIpA5po9aTM5cyD/NjacMzWN5zU7dAIpYyBFulvCzLwLeut8sz5mYhEIjtFEDY6hNe1nT6r4UA7o4HBMTYtiCCdiaonXtXdN0aSHtUJvNcCeapjGHieFZQAC+PPQaj/Zqq8mQ3EpgN1x/aDc1taKlFV8Uvyw8fvz24wMpjvYkFAYNrxYT6EgrzDi1fWDQUKutDYH+PIwD+CNjvsvTD+o8SU4PEcPXkBrcmODSSNlug9sJNkgB24rY9XOluQ20LdjhBxLfrmPpONuNAiMNy/OVDUjkcWwDdCu4Tnvqz8eumTDN/+wGfx2zVRItySWV3UvTAehRdTishFjo8Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=pfcz/wRaHn2k8tM0/H778pNFOIC5Wa6nOLQ3VFYVg3Y=; b=QMn6aW8cfT7YlQf/xNIyLHpVssBQ9WdMyVzJH1dgKAryl8hUNSsAauy6Y3ppaxGgYLfvNdTbt/Gjb9tuLS18gZGlxbp2Q2nrtEIuzcjTBpKljV9hX/iFODPJEsExC5yp0OCbvxM04UsoALyUT19Fb1ItziOnf6S7/hpflGk5nfgcUSqV+PjwRhYR18J2VkRsgg+Nj9z+mcBSxFKhBEcCPK+kho3mXtf29suXLNSpur3OSa0iwQB22smLRkgBCO4S6kBdoPHw2wA+Kk6UfCGo49GBuWoi05a4sfnbcAhaHAgT/SbXnOh9IhVzkQTKjYqjpkGQsYlm6YODL65y2wRW2A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 40.67.248.234) smtp.rcpttodomain=lists.infradead.org smtp.mailfrom=arm.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=arm.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=pfcz/wRaHn2k8tM0/H778pNFOIC5Wa6nOLQ3VFYVg3Y=; b=3hbmT7LMJVmZD2YeMAg5nd/m4G2U8rxBZhPbu/DKjgf11gQZmvgXDVMWqeKY7674t1YsIGezkWTBa6NTXHjPb+4F4odBIs3negZoGFLzhMum07+XyHSKgsF4jRRmBDBCTQwAhRmA3nFC9GzQ3RMdkPDWgIUZ3nAfBzA8CGCn48E= Received: from AM7PR03CA0014.eurprd03.prod.outlook.com (2603:10a6:20b:130::24) by DB7PR08MB3628.eurprd08.prod.outlook.com (2603:10a6:10:44::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4755.21; Fri, 10 Dec 2021 16:54:45 +0000 Received: from VE1EUR03FT014.eop-EUR03.prod.protection.outlook.com (2603:10a6:20b:130:cafe::97) by AM7PR03CA0014.outlook.office365.com (2603:10a6:20b:130::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4778.12 via Frontend Transport; Fri, 10 Dec 2021 16:54:45 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 40.67.248.234) smtp.mailfrom=arm.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=arm.com; Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 40.67.248.234 as permitted sender) receiver=protection.outlook.com; client-ip=40.67.248.234; helo=nebula.arm.com; Received: from nebula.arm.com (40.67.248.234) by VE1EUR03FT014.mail.protection.outlook.com (10.152.19.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.4778.12 via Frontend Transport; Fri, 10 Dec 2021 16:54:45 +0000 Received: from AZ-NEU-EX03.Arm.com (10.251.24.31) by AZ-NEU-EX03.Arm.com (10.251.24.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Fri, 10 Dec 2021 16:54:39 +0000 Received: from e124191.cambridge.arm.com (10.1.197.45) by mail.arm.com (10.251.24.31) with Microsoft SMTP Server id 15.1.2308.20 via Frontend Transport; Fri, 10 Dec 2021 16:54:39 +0000 From: Joey Gouly To: CC: , , , , , , , , , Subject: [PATCH v3 3/3] arm64: cpufeature: add HWCAP for FEAT_RPRES Date: Fri, 10 Dec 2021 16:54:32 +0000 Message-ID: <20211210165432.8106-4-joey.gouly@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211210165432.8106-1-joey.gouly@arm.com> References: <20211210165432.8106-1-joey.gouly@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-Office365-Filtering-Correlation-Id: 9c4a9304-6565-4c74-f199-08d9bbfdca18 X-MS-TrafficTypeDiagnostic: DB7PR08MB3628:EE_|DB5EUR03FT056:EE_|VI1PR0802MB2511:EE_ X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:6430;OLM:6430; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234; CTRY:IE; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:nebula.arm.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(4636009)(46966006)(36840700001)(40470700001)(6666004)(36756003)(36860700001)(26005)(186003)(508600001)(336012)(8676002)(426003)(70586007)(70206006)(83380400001)(4326008)(47076005)(40460700001)(54906003)(8936002)(2616005)(6916009)(316002)(7696005)(81166007)(5660300002)(1076003)(356005)(2906002)(82310400004)(86362001)(44832011)(36900700001); DIR:OUT; SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR08MB3628 X-MS-Exchange-Transport-CrossTenantHeadersStripped: DB5EUR03FT056.eop-EUR03.prod.protection.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: a3673b3a-9313-49b0-c271-08d9bbfdc51d X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:63.35.35.123; CTRY:IE; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:64aa7808-outbound-1.mta.getcheckrecipient.com; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; CAT:NONE; SFS:(4636009)(36840700001)(46966006)(7696005)(508600001)(26005)(336012)(186003)(2616005)(44832011)(5660300002)(426003)(6916009)(54906003)(86362001)(36756003)(82310400004)(316002)(4326008)(1076003)(8936002)(8676002)(83380400001)(81166007)(70206006)(70586007)(36860700001)(47076005)(2906002)(107886003)(6666004); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Dec 2021 16:54:54.1075 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9c4a9304-6565-4c74-f199-08d9bbfdca18 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR03FT056.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0802MB2511 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211210_085458_814193_21E511F3 X-CRM114-Status: GOOD ( 13.22 ) 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 Add a new HWCAP to detect the Increased precision of Reciprocal Estimate and Reciprocal Square Root Estimate feature (FEAT_RPRES), introduced in Armv8.7. Also expose this to userspace in the ID_AA64ISAR2_EL1 feature register. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon Cc: Jonathan Corbet --- Documentation/arm64/cpu-feature-registers.rst | 8 ++++++++ Documentation/arm64/elf_hwcaps.rst | 4 ++++ arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/kernel/cpufeature.c | 2 ++ arch/arm64/kernel/cpuinfo.c | 1 + 6 files changed, 17 insertions(+) diff --git a/Documentation/arm64/cpu-feature-registers.rst b/Documentation/arm64/cpu-feature-registers.rst index 1b19d20c2dbd..749ae970c319 100644 --- a/Documentation/arm64/cpu-feature-registers.rst +++ b/Documentation/arm64/cpu-feature-registers.rst @@ -283,6 +283,14 @@ infrastructure: | AFP | [47-44] | y | +------------------------------+---------+---------+ + 9) ID_AA64ISAR2_EL1 - Instruction set attribute register 2 + + +------------------------------+---------+---------+ + | Name | bits | visible | + +------------------------------+---------+---------+ + | RPRES | [7-4] | y | + +------------------------------+---------+---------+ + Appendix I: Example ------------------- diff --git a/Documentation/arm64/elf_hwcaps.rst b/Documentation/arm64/elf_hwcaps.rst index 247728d37911..b72ff17d600a 100644 --- a/Documentation/arm64/elf_hwcaps.rst +++ b/Documentation/arm64/elf_hwcaps.rst @@ -255,6 +255,10 @@ HWCAP2_AFP Functionality implied by ID_AA64MFR1_EL1.AFP == 0b0001. +HWCAP2_RPRES + + Functionality implied by ID_AA64ISAR2_EL1.RPRES == 0b0001. + 4. Unused AT_HWCAP bits ----------------------- diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h index 2809df2fdd63..f68fbb207473 100644 --- a/arch/arm64/include/asm/hwcap.h +++ b/arch/arm64/include/asm/hwcap.h @@ -107,6 +107,7 @@ #define KERNEL_HWCAP_MTE __khwcap2_feature(MTE) #define KERNEL_HWCAP_ECV __khwcap2_feature(ECV) #define KERNEL_HWCAP_AFP __khwcap2_feature(AFP) +#define KERNEL_HWCAP_RPRES __khwcap2_feature(RPRES) /* * This yields a mask that user programs can use to figure out what diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h index 180da7396549..f03731847d9d 100644 --- a/arch/arm64/include/uapi/asm/hwcap.h +++ b/arch/arm64/include/uapi/asm/hwcap.h @@ -77,5 +77,6 @@ #define HWCAP2_MTE (1 << 18) #define HWCAP2_ECV (1 << 19) #define HWCAP2_AFP (1 << 20) +#define HWCAP2_RPRES (1 << 21) #endif /* _UAPI__ASM_HWCAP_H */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index c36018310da5..a46ab3b1c4d5 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -226,6 +226,7 @@ static const struct arm64_ftr_bits ftr_id_aa64isar1[] = { }; static const struct arm64_ftr_bits ftr_id_aa64isar2[] = { + ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64ISAR2_RPRES_SHIFT, 4, 0), ARM64_FTR_END, }; @@ -2487,6 +2488,7 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = { #endif /* CONFIG_ARM64_MTE */ HWCAP_CAP(SYS_ID_AA64MMFR0_EL1, ID_AA64MMFR0_ECV_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ECV), HWCAP_CAP(SYS_ID_AA64MMFR1_EL1, ID_AA64MMFR1_AFP_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_AFP), + HWCAP_CAP(SYS_ID_AA64ISAR2_EL1, ID_AA64ISAR2_RPRES_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_RPRES), {}, }; diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index f2f8fe02f39c..591c18a889a5 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -96,6 +96,7 @@ static const char *const hwcap_str[] = { [KERNEL_HWCAP_MTE] = "mte", [KERNEL_HWCAP_ECV] = "ecv", [KERNEL_HWCAP_AFP] = "afp", + [KERNEL_HWCAP_RPRES] = "rpres", }; #ifdef CONFIG_COMPAT