From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 C1BA1C48BE8 for ; Fri, 18 Jun 2021 12:39:57 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 8D31F61369 for ; Fri, 18 Jun 2021 12:39:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8D31F61369 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=wdc.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org 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=W10CMVebZiShTgSk6nr/0hsdJlyMPj7BLNUb7Uqa+Rk=; b=bc+VGbo/qeIUkS xLIOiT7UpS2p83uGgaxgCAVSx8RkivqC+CUqs7lm09+deRx2af4wrKj3l7bjNi9IZTtbZPDpZWk8I yt3p4hyZGDF06MfSqpj8JUjJ2MrKHhvzGBAHvIw4z1zEAdyPKvkucdP1YDdOfENQhO0EMc5yPFzrS FESSbO+yry7DWZORvSyol4glK6BEVDqgBchsUxGXs+ivxQQLoP/T7Ds4m6TyQvvgoF0sTisV457+g CxddPgMsz1uMQqCs7rORoKZ7WcwVj2WY7Kdj9EX67yK9NyIzcO7u5ddHLpjavz4VVXqs5iZYxBSdZ JfcbwRjdwhybbV6Kg8Bg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1luDmf-00E2uL-2r; Fri, 18 Jun 2021 12:39:41 +0000 Received: from esa1.hgst.iphmx.com ([68.232.141.245]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1luDmb-00E2t8-Q7 for linux-riscv@lists.infradead.org; Fri, 18 Jun 2021 12:39:39 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1624019977; x=1655555977; h=from:to:cc:subject:date:message-id:in-reply-to: references:content-transfer-encoding:mime-version; bh=KlzjgfDDS0bfoaFpWdrpgenEz3ga6t8KJmgOBXJ5SfM=; b=gx3hQw90CZ/9qqFHSeCykZZmWSCd3Z8yw1i1LsZIGBicxOVZsldVmecz enH85jac8+4W0oHPFD9y4Hi+Y4Y2WE9Av1RD6BD8NPHqCwu6hklDVNLkr IXsB3PspRcPcj40pu6f7jtkFsLSMPV2KVXvV437MECyFxg2x1uMQFSRrl kFX71lGDtwqZCUPSvm8SCIzJ5n04rxGeOXD9n8L7CE7m0fvJl/XOw00br g2aD8qDKU3cDiMV36Ul0BWLKKJty3o2DegRqj0m1aKkulcfzMy14mDAcM jmuvSBK0JRHU0jBOwJk5zGMAcUVwbmcWPRrCbSYE+Q5A4M8Rjpl+Vaplb A==; IronPort-SDR: GbhzW0fQpN/zHwWhM3xoiEI6AKw/RYCF2v3oTA2C+iRpwH3YYhI1y2eSmToCu/pEcqAcanqMav Wv1iPvNUm7b0Koc6mOMNESIJbJlWnU+62y6zI+M2yZUPmYAxUZC6ZMOjYa+rwXxoXBhenzdgAI 7UJi1LWTgunUjj34sdlJxxu2gXPTXYJwLho82ZP8sqimq6Ct1G5s6ewhabiLbnmsixhA80GEu0 +kP14q7k7HSUDXF7ArCBYvTFwKM3FDG7+2FuH3A/R7byrvnNEFrLfSFK4ya7Pu/eqyQrFXWQl/ vi0= X-IronPort-AV: E=Sophos;i="5.83,283,1616428800"; d="scan'208";a="283779308" Received: from mail-mw2nam12lp2040.outbound.protection.outlook.com (HELO NAM12-MW2-obe.outbound.protection.outlook.com) ([104.47.66.40]) by ob1.hgst.iphmx.com with ESMTP; 18 Jun 2021 20:39:36 +0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ImsDc1zqa4h3QoXBf5o+fFZWzE2NH/3N7CLNk9aCGWMbAbh8enfCmvoAkJwHDbERQ17eD7EqmREvgY/SMOGTjLTEZr33qLGfLAFcK+fRO5wvyeRxLAgRN6Apnid1wuzx5Hg9ylxBQ8xtCPG9NqREdIFvyZahLMt4y6VKnkD3trw07pSkGhrkmICl3x4w6D8ZHCOdIlA3F7tMb/vjd2GoAJCs3Nn+AfH7Sgu8TtiQluwvRp0LRZmNRoiHEzQxWM6IDLY9ITiIqGII7Idx59EbfrmSmNIpcUZkTzfegRU5S5DUdGuTDj7LbIRb4AaZUcqvzeUUIcKPeBOdbkHmaPc2zQ== 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-SenderADCheck; bh=xAiDCUj00GGoAG8WLp6p6vPZ+oLgsdbXAnnLR8roOos=; b=GuVkdRTZZPgT1rc9uRwP0RCUigpPYSonrcqendMrO1P+xkOW2pphcJyhzVRCoV9skmGuOlmI0Clv20QZbUOji8ZzgElRc/vTfE3MQoozwJIrv6QUNgGcCJlkumAwb/gg3J9yXu5Q86ual8h+mG4xZpKntm7ebZHYUkw+Y9Ei/B5NG1S9H5eWyzJUzNMGmZKMcFQnbO5+0+zlPyPa1mH3Xd/5XIL+LsF8ayzNiGTvWil3IggfDI23OdptUblZJ2/VT6o0CBpYxiFAtg/RaekS1xxhgCeA34kK23b49I5Tzb1exMMYWGo+fGY1n80PPvv+RDnZWhara1dteYuSHznkCw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=wdc.com; dmarc=pass action=none header.from=wdc.com; dkim=pass header.d=wdc.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sharedspace.onmicrosoft.com; s=selector2-sharedspace-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xAiDCUj00GGoAG8WLp6p6vPZ+oLgsdbXAnnLR8roOos=; b=AH9bfI/Ym+25Zpz/0wpHnHK/b1ZWgOkooBh5kwn3/Z88kNP21r/SC9UIDpno5di+U0vqdxqJh2y+oM1miXgHJKrffo6RS0vg+k3KTmBocs68sSR76cGvWDzvUxERfXn6xkaRhH/S2JjvIz9r+uPPjV9UpMao8o7s22CYFvxrbig= Authentication-Results: dabbelt.com; dkim=none (message not signed) header.d=none;dabbelt.com; dmarc=none action=none header.from=wdc.com; Received: from CO6PR04MB7812.namprd04.prod.outlook.com (2603:10b6:303:138::6) by CO6PR04MB7843.namprd04.prod.outlook.com (2603:10b6:5:35f::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4242.19; Fri, 18 Jun 2021 12:39:36 +0000 Received: from CO6PR04MB7812.namprd04.prod.outlook.com ([fe80::a153:b7f8:c87f:89f8]) by CO6PR04MB7812.namprd04.prod.outlook.com ([fe80::a153:b7f8:c87f:89f8%9]) with mapi id 15.20.4242.021; Fri, 18 Jun 2021 12:39:36 +0000 From: Anup Patel To: Palmer Dabbelt , Palmer Dabbelt , Paul Walmsley , Thomas Gleixner , Marc Zyngier , Daniel Lezcano , Rob Herring Cc: Atish Patra , Alistair Francis , Anup Patel , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Anup Patel Subject: [RFC PATCH v2 04/11] RISC-V: Allow marking IPIs as suitable for remote FENCEs Date: Fri, 18 Jun 2021 18:08:44 +0530 Message-Id: <20210618123851.1344518-5-anup.patel@wdc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210618123851.1344518-1-anup.patel@wdc.com> References: <20210618123851.1344518-1-anup.patel@wdc.com> X-Originating-IP: [122.171.164.186] X-ClientProxiedBy: MA1PR0101CA0025.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:22::11) To CO6PR04MB7812.namprd04.prod.outlook.com (2603:10b6:303:138::6) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from wdc.com (122.171.164.186) by MA1PR0101CA0025.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:22::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4242.15 via Frontend Transport; Fri, 18 Jun 2021 12:39:32 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1b455923-6198-4c96-7c80-08d93256218b X-MS-TrafficTypeDiagnostic: CO6PR04MB7843: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: WDCIPOUTBOUND: EOP-TRUE X-MS-Oob-TLC-OOBClassifiers: OLM:7691; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: YNviAol7z8DsJnkhqs3EYri8pV87dAtNJP4dIhwYxxwjj2ifnqjfW7bR6MnUjpVsq8WSX31MxDgmVhZGXrViuhrtWcsVX5R5gVQZHlJn9n2lCDmCSYWRcMoZPJf4oCvDye59ygZHY08jysEiIucfNgJ5jEkpVrL3lulHrpMtO1qNMK9JIo4LZS5n7T3/mscRzHbjhHJ8H3xSaIGyWgHEKIcQvx42xf27sLeZ/dz2y4jNqvTMMtSSwF8CgZmrNyuzrlxiDJB/ppBIPaJydC58NCm7UZahfXnUUcQXUUz7t6EZX014MFC3xQHcVNJy2Cg1rZ3pa+S08UWt2ke5ZWiw/7p/7YOMTJAsUayFeV4LeOSdJRvAF0kBGXrPEWtMTHPqM9wtLeaM2Y4Z6YiKpLXmia2SLVYqFN6ZoAqIXPrnu1neiI4f0264CaRhhRnDFWln54mY/m+Nq+ldjtbU3AlyUNIvTF7RHBrXqwahxeArKpqenx9zDFpb7cQf0w1SfHGpj/FB/XArsMxMuaD7rtiCDRcN1utxC5toWIwH2fduWWNlXupB309k3yQjgmpj4bJ1culIdXk4SfcKYvfiAkFF3a09pqiMllRyfV/ZVTZ2l71cfldiZ898X/D2L99wnlJkJXpmYfSq6QGs3aFskya7Rg== X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:CO6PR04MB7812.namprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(396003)(39860400002)(366004)(346002)(376002)(136003)(83380400001)(316002)(4326008)(16526019)(186003)(110136005)(54906003)(52116002)(26005)(55016002)(2616005)(956004)(2906002)(5660300002)(7416002)(478600001)(38100700002)(38350700002)(8676002)(66556008)(8886007)(44832011)(86362001)(8936002)(36756003)(1076003)(66476007)(66946007)(6666004)(7696005); DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?lBQBccsGOWMDQ9VifTWOhXaEbTAcKaRybvVrIl73Bv9KshMGIJV1u/6I/aJU?= =?us-ascii?Q?sWYRvfrQgGvgOjInaYa6Y5C9bm+JXn3i31Vl8aM3NxTMdTiJAne97nsDpoXS?= =?us-ascii?Q?9kdLHjYdyegmNkoZYd+VWVLf8HvD4yndsGPjDLqQbnhzI1sGNuMHFkWya/S/?= =?us-ascii?Q?tPL5PbHPh3j0tP3Kt17tKIybcvIWWf8ZFPSrrL7cuN6Y3PdGuDbi80Ng4ZAZ?= =?us-ascii?Q?Nw9/1iaWny9c2TkWhwRYOyR6LMmIuzWZdlb7apZXHSqC51LDm2CLiSLTKU2N?= =?us-ascii?Q?yWEsN2AZnr8IaEyt9onGU/zjSzgtS5JLeCmkW1B2JiWFpWX8rlYtWFyFkfRX?= =?us-ascii?Q?aC9pQl9YCJXX/CjDr3kQU2AcSmI1qEdrlhbkI2xy+AcEGthhNiej4lo2B1LF?= =?us-ascii?Q?yqEtjbR5X07hrplc0jLmjifzWztMAOfCC3OIEZI0wild/0oaL1+RmDuRpVyq?= =?us-ascii?Q?Azfwp/9i/gH08pYZdhMlU9C+yAVfANT1eA9qs5jKJhfjjRj+FoZ4W/wrENiM?= =?us-ascii?Q?uNfWDz54FYXv77WtU9WHcLHvM4nyIIXMK6onQ2SL4P56yzWhacHFNZuKT0Gh?= =?us-ascii?Q?iEyDRMY2UAw4dMhDwBJ2PFTM5RW/C44JJVU0d77LOgDTKZWIx8CJVweO6dZF?= =?us-ascii?Q?kd4ZHJxFU1c3YxYvUC0ukSNTicnebgISWRJEB05kLZKy+rRyeQ2vWF/VGQsG?= =?us-ascii?Q?FdBiTBYyMNYkJRpR+M8C/HGHUfRU0DwfqEFe2UQYVnN/eQfoNnn1jFBtn46B?= =?us-ascii?Q?Hdv2Uc4ZGuz8rxwwgnDdIQMakYV8pgD8JAuj9v3+06ORto7qYrnz9glV8nr4?= =?us-ascii?Q?Bd7wxk+zzvNKcbFPTp0uxps3IS1RcLeqKekTQM2u8ak8kLCxAnhpI7g34Mpc?= =?us-ascii?Q?GSIkxb8Vtwjt5s+xZ8scN+VXu8easiVBmcvUjQzz907xg/6xltpOBqudjC+f?= =?us-ascii?Q?SKLSQlpkxW1DunCWPbBUkOTgJD3gGZsxRowLJJvXgidpPwRIxzr9BsrxLx7k?= =?us-ascii?Q?vYhEKizyjpyqn8XnpjqZzLHrbYYOCbM3P6o7wVV6IYlG8HrbmIsQGLD7BDov?= =?us-ascii?Q?uDCn4LJVkKEcF3Ch7jfmVe3HaFD15E5FdCJQEukdWNm4MljEmctZn9UQsDTj?= =?us-ascii?Q?WqfWzuRBasykakH9jBiElZpu5pUsbce0qburCtwnAKymYyFR1ukcRbvS42ma?= =?us-ascii?Q?epauOMjEmS0lcqZ8pR6dWwoAzG6xcatS9C/ecp6BNlhpaaelAqk2JIP9O5vu?= =?us-ascii?Q?AsPZpkYuy++oZZ2wgMq2XFwQJ59aSES9EuHc0IHpCV11Ehuvg7bdRvKalTfN?= =?us-ascii?Q?AUV+wSfv1+VHz6x8GouBJqT+?= X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1b455923-6198-4c96-7c80-08d93256218b X-MS-Exchange-CrossTenant-AuthSource: CO6PR04MB7812.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Jun 2021 12:39:36.2076 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 2a6TjvAKZ2ug7YDka56s6S3jfPLHPmASDiW/mBGaEz6hNPTrQPRlfa/u1o502Xe1t5pGzh6YT+OcOFHMZ6TFyA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO6PR04MB7843 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210618_053937_946109_BB6962EB X-CRM114-Status: GOOD ( 17.33 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org To do remote FENCEs (i.e. remote TLB flushes) using IPI calls on the RISC-V kernel, we need hardware mechanism to directly inject IPI from the RISC-V kernel instead of using SBI calls. The upcoming ACLINT [M|S]SWI devices and AIA IMSIC devices allow direct IPI injection from the RISC-V kernel. To support this, we extend the riscv_ipi_set_virq_range() function so that irqchip drivers can mark IPIs as suitable for remote FENCEs. Signed-off-by: Anup Patel --- arch/riscv/include/asm/smp.h | 18 ++++++++++++++++-- arch/riscv/kernel/sbi-ipi.c | 2 +- arch/riscv/kernel/smp.c | 9 ++++++++- 3 files changed, 25 insertions(+), 4 deletions(-) diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h index 6bdaab122ffa..f4856c911335 100644 --- a/arch/riscv/include/asm/smp.h +++ b/arch/riscv/include/asm/smp.h @@ -16,6 +16,9 @@ struct seq_file; extern unsigned long boot_cpu_hartid; #ifdef CONFIG_SMP + +#include + /* * Mapping between linux logical cpu index and hartid. */ @@ -47,7 +50,12 @@ void riscv_ipi_disable(void); void riscv_ipi_setup(void); /* Set the IPI interrupt numbers for arch (called by irqchip drivers) */ -void riscv_ipi_set_virq_range(int virq, int nr_irqs); +void riscv_ipi_set_virq_range(int virq, int nr_irqs, bool use_for_rfence); + +/* Check if we can use IPIs for remote FENCEs */ +DECLARE_STATIC_KEY_FALSE(riscv_ipi_for_rfence); +#define riscv_use_ipi_for_rfence() \ + static_branch_unlikely(&riscv_ipi_for_rfence) /* Secondary hart entry */ asmlinkage void smp_callin(void); @@ -102,10 +110,16 @@ static inline void riscv_ipi_setup(void) { } -static inline void riscv_ipi_set_virq_range(int virq, int nr) +static inline void riscv_ipi_set_virq_range(int virq, int nr, + bool use_for_rfence) { } +static inline bool riscv_use_ipi_for_rfence(void) +{ + return false; +} + #endif /* CONFIG_SMP */ #if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP) diff --git a/arch/riscv/kernel/sbi-ipi.c b/arch/riscv/kernel/sbi-ipi.c index 6cc0ea95e1af..0a06542d2b74 100644 --- a/arch/riscv/kernel/sbi-ipi.c +++ b/arch/riscv/kernel/sbi-ipi.c @@ -153,7 +153,7 @@ static int __init sbi_ipi_set_virq(void) return -ENOMEM; } - riscv_ipi_set_virq_range(virq, BITS_PER_LONG); + riscv_ipi_set_virq_range(virq, BITS_PER_LONG, false); return 0; } diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c index 26d563615f53..3905177b6748 100644 --- a/arch/riscv/kernel/smp.c +++ b/arch/riscv/kernel/smp.c @@ -178,7 +178,10 @@ void riscv_ipi_setup(void) riscv_ipi_enable(); } -void riscv_ipi_set_virq_range(int virq, int nr) +DEFINE_STATIC_KEY_FALSE(riscv_ipi_for_rfence); +EXPORT_SYMBOL_GPL(riscv_ipi_for_rfence); + +void riscv_ipi_set_virq_range(int virq, int nr, bool use_for_rfence) { if (WARN_ON(ipi_virq_base)) return; @@ -186,6 +189,10 @@ void riscv_ipi_set_virq_range(int virq, int nr) WARN_ON(nr < IPI_MAX); nr_ipi = min(nr, IPI_MAX); ipi_virq_base = virq; + if (use_for_rfence) + static_branch_enable(&riscv_ipi_for_rfence); + else + static_branch_disable(&riscv_ipi_for_rfence); } EXPORT_SYMBOL_GPL(riscv_ipi_set_virq_range); -- 2.25.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv