From patchwork Fri Jan 20 14:10:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yann Sionneau X-Patchwork-Id: 13110099 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 AA98CC05027 for ; Fri, 20 Jan 2023 15:31:26 +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=/V4pH8dip9PpV1wDfj/MhnWL9Obc+gX0iT30yVsVeac=; b=m2jbDK7WEvQ2Pj kSIzRPeTeGqOYsg+xXWbFBae5rWAF6h1pAk9eF39ra4xZbKwVc4ntgjXKcfLly+jvG6uFBPBIrEMg pbNUUS5H7VH86Fks6SxbPfggnJxigVNaIVg5i4DgRSVdSUdd47fsXGpypbFh0El+KDRiMz6cRfJGp dNoDNHLhLIcOeDIMgYZl7ljdWqIroDfgvZijiEe3FO7sIo/LbEqapriQIFnCgEPA1Gn2/+CSLAfGx qdN9jnKAr8w4DTbIoiWl5XkDWr+jV14d+tziv0RaPYKcI8eKJ4m4ckDklSAZE2mvRV8sKeTtASh7F IMcjiufTeUeLnxaX6LVA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pItMJ-00B01a-0a; Fri, 20 Jan 2023 15:31:15 +0000 Received: from smtpout30.security-mail.net ([85.31.212.36] helo=fx306.security-mail.net) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pIsG8-00Ag9h-NX for linux-riscv@lists.infradead.org; Fri, 20 Jan 2023 14:20:50 +0000 Received: from localhost (fx306.security-mail.net [127.0.0.1]) by fx306.security-mail.net (Postfix) with ESMTP id 02E4B35CF85 for ; Fri, 20 Jan 2023 15:20:47 +0100 (CET) Received: from fx306 (fx306.security-mail.net [127.0.0.1]) by fx306.security-mail.net (Postfix) with ESMTP id 46F4D35CEF0; Fri, 20 Jan 2023 15:20:46 +0100 (CET) Received: from zimbra2.kalray.eu (unknown [217.181.231.53]) by fx306.security-mail.net (Postfix) with ESMTPS id 3B41B35CD23; Fri, 20 Jan 2023 15:20:45 +0100 (CET) Received: from zimbra2.kalray.eu (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTPS id 841C727E0458; Fri, 20 Jan 2023 15:10:38 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTP id 67DE527E0474; Fri, 20 Jan 2023 15:10:38 +0100 (CET) Received: from zimbra2.kalray.eu ([127.0.0.1]) by localhost (zimbra2.kalray.eu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id Kpdh9d1egf6R; Fri, 20 Jan 2023 15:10:38 +0100 (CET) Received: from junon.lin.mbt.kalray.eu (unknown [192.168.37.161]) by zimbra2.kalray.eu (Postfix) with ESMTPSA id DE5A427E0458; Fri, 20 Jan 2023 15:10:37 +0100 (CET) X-Virus-Scanned: E-securemail Secumail-id: <883a.63caa33d.39b9a.0> DKIM-Filter: OpenDKIM Filter v2.10.3 zimbra2.kalray.eu 67DE527E0474 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kalray.eu; s=32AE1B44-9502-11E5-BA35-3734643DEF29; t=1674223838; bh=r0jAYvZMgDHNmtYPIBemAGb6cgybEgHcmW3NkzN/0Bc=; h=From:To:Date:Message-Id:MIME-Version; b=JKNRyzm7+8sxXJUhLzONaUXzidzmY7QHybfABV02MMeEolEK1l0P/zyCPivr0qi3X cMk6eiWHc8wcM/3mwaZc92PFr6HmcHLhtp6SGUL9n/464kv1zJak07VGMurb1BFNSB JEfwZjhbgtlfk55C9aauCac0b4/oyWiVvpTX7xMY= From: Yann Sionneau To: Arnd Bergmann , Jonathan Corbet , Thomas Gleixner , Marc Zyngier , Rob Herring , Krzysztof Kozlowski , Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland , Eric Biederman , Kees Cook , Oleg Nesterov , Ingo Molnar , Waiman Long , "Aneesh Kumar K.V" , Andrew Morton , Nick Piggin , Paul Moore , Eric Paris , Christian Brauner , Paul Walmsley , Palmer Dabbelt , Albert Ou , Jules Maselbas , Yann Sionneau , Guillaume Thouvenin , Clement Leger , Vincent Chardon , Marc =?utf-8?b?UG91bGhp?= =?utf-8?b?w6hz?= , Julian Vetter , Samuel Jones , Ashley Lesdalons , Thomas Costis , Marius Gligor , Jonathan Borne , Julien Villette , Luc Michel , Louis Morhet , Julien Hascoet , Jean-Christophe Pince , Guillaume Missonnier , Alex Michon , Huacai Chen , WANG Xuerui , Shaokun Zhang , John Garry , Guangbin Huang , Bharat Bhushan , Bibo Mao , Atish Patra , "Jason A. Donenfeld" , Qi Liu , Jiaxun Yang , Catalin Marinas , Mark Brown , Janosch Frank , Alexey Dobriyan Cc: Benjamin Mugnier , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-audit@redhat.com, linux-riscv@lists.infradead.org, bpf@vger.kernel.org Subject: [RFC PATCH v2 29/31] kvx: Add support for cpuinfo Date: Fri, 20 Jan 2023 15:10:00 +0100 Message-ID: <20230120141002.2442-30-ysionneau@kalray.eu> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20230120141002.2442-1-ysionneau@kalray.eu> References: <20230120141002.2442-1-ysionneau@kalray.eu> MIME-Version: 1.0 X-ALTERMIMEV2_out: done X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230120_062048_937330_3ED8EC03 X-CRM114-Status: GOOD ( 16.93 ) 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: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add support for cpuinfo on kvx arch. Co-developed-by: Clement Leger Signed-off-by: Clement Leger Co-developed-by: Guillaume Thouvenin Signed-off-by: Guillaume Thouvenin Co-developed-by: Julian Vetter Signed-off-by: Julian Vetter Signed-off-by: Jules Maselbas Signed-off-by: Yann Sionneau --- Notes: V1 -> V2: no changes arch/kvx/kernel/cpuinfo.c | 96 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 arch/kvx/kernel/cpuinfo.c diff --git a/arch/kvx/kernel/cpuinfo.c b/arch/kvx/kernel/cpuinfo.c new file mode 100644 index 000000000000..f44c46c1e4ba --- /dev/null +++ b/arch/kvx/kernel/cpuinfo.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2017-2023 Kalray Inc. + * Author(s): Clement Leger + * Guillaume Thouvenin + */ + +#include +#include +#include +#include +#include + +unsigned long elf_hwcap __read_mostly; + +static int show_cpuinfo(struct seq_file *m, void *v) +{ + int cpu_num = *(unsigned int *)v; + struct cpuinfo_kvx *n = per_cpu_ptr(&cpu_info, cpu_num); + + seq_printf(m, "processor\t: %d\nvendor_id\t: Kalray\n", cpu_num); + + seq_printf(m, + "copro enabled\t: %s\n" + "arch revision\t: %d\n" + "uarch revision\t: %d\n", + n->copro_enable ? "yes" : "no", + n->arch_rev, + n->uarch_rev); + + seq_printf(m, + "bogomips\t: %lu.%02lu\n" + "cpu MHz\t\t: %llu.%03llu\n\n", + (loops_per_jiffy * HZ) / 500000, + ((loops_per_jiffy * HZ) / 5000) % 100, + n->freq / 1000000, (n->freq / 10000) % 100); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + if (*pos == 0) + *pos = cpumask_first(cpu_online_mask); + if (*pos >= num_online_cpus()) + return NULL; + + return pos; +} + +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + *pos = cpumask_next(*pos, cpu_online_mask); + + return c_start(m, pos); +} + +static void c_stop(struct seq_file *m, void *v) +{ +} + +const struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; + +static int __init setup_cpuinfo(void) +{ + int cpu; + struct clk *clk; + unsigned long cpu_freq = 1000000000; + struct device_node *node = of_get_cpu_node(0, NULL); + + clk = of_clk_get(node, 0); + if (IS_ERR(clk)) { + printk(KERN_WARNING + "Device tree missing CPU 'clock' parameter. Assuming frequency is 1GHZ"); + goto setup_cpu_freq; + } + + cpu_freq = clk_get_rate(clk); + + clk_put(clk); + +setup_cpu_freq: + of_node_put(node); + + for_each_possible_cpu(cpu) + per_cpu_ptr(&cpu_info, cpu)->freq = cpu_freq; + + return 0; +} + +late_initcall(setup_cpuinfo);