| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20230120141002.2442-30-ysionneau@kalray.eu>
Date: Fri, 20 Jan 2023 15:10:00 +0100
From: Yann Sionneau <ysionneau@...ray.eu>
To: Arnd Bergmann <arnd@...db.de>, Jonathan Corbet <corbet@....net>,
Thomas Gleixner <tglx@...utronix.de>,
Marc Zyngier <maz@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Will Deacon <will@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Boqun Feng <boqun.feng@...il.com>,
Mark Rutland <mark.rutland@....com>,
Eric Biederman <ebiederm@...ssion.com>,
Kees Cook <keescook@...omium.org>,
Oleg Nesterov <oleg@...hat.com>,
Ingo Molnar <mingo@...hat.com>,
Waiman Long <longman@...hat.com>,
"Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Nick Piggin <npiggin@...il.com>,
Paul Moore <paul@...l-moore.com>,
Eric Paris <eparis@...hat.com>,
Christian Brauner <brauner@...nel.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Jules Maselbas <jmaselbas@...ray.eu>,
Yann Sionneau <ysionneau@...ray.eu>,
Guillaume Thouvenin <gthouvenin@...ray.eu>,
Clement Leger <clement@...ment-leger.fr>,
Vincent Chardon <vincent.chardon@...ys-design.com>,
Marc Poulhiès <dkm@...aplop.net>,
Julian Vetter <jvetter@...ray.eu>,
Samuel Jones <sjones@...ray.eu>,
Ashley Lesdalons <alesdalons@...ray.eu>,
Thomas Costis <tcostis@...ray.eu>,
Marius Gligor <mgligor@...ray.eu>,
Jonathan Borne <jborne@...ray.eu>,
Julien Villette <jvillette@...ray.eu>,
Luc Michel <lmichel@...ray.eu>,
Louis Morhet <lmorhet@...ray.eu>,
Julien Hascoet <jhascoet@...ray.eu>,
Jean-Christophe Pince <jcpince@...il.com>,
Guillaume Missonnier <gmissonnier@...ray.eu>,
Alex Michon <amichon@...ray.eu>,
Huacai Chen <chenhuacai@...nel.org>,
WANG Xuerui <git@...0n.name>,
Shaokun Zhang <zhangshaokun@...ilicon.com>,
John Garry <john.garry@...wei.com>,
Guangbin Huang <huangguangbin2@...wei.com>,
Bharat Bhushan <bbhushan2@...vell.com>,
Bibo Mao <maobibo@...ngson.cn>,
Atish Patra <atishp@...shpatra.org>,
"Jason A. Donenfeld" <Jason@...c4.com>,
Qi Liu <liuqi115@...wei.com>,
Jiaxun Yang <jiaxun.yang@...goat.com>,
Catalin Marinas <catalin.marinas@....com>,
Mark Brown <broonie@...nel.org>,
Janosch Frank <frankja@...ux.ibm.com>,
Alexey Dobriyan <adobriyan@...il.com>
Cc: Benjamin Mugnier <mugnier.benjamin@...il.com>,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-mm@...ck.org,
linux-arch@...r.kernel.org, linux-audit@...hat.com,
linux-riscv@...ts.infradead.org, bpf@...r.kernel.org
Subject: [RFC PATCH v2 29/31] kvx: Add support for cpuinfo
Add support for cpuinfo on kvx arch.
Co-developed-by: Clement Leger <clement@...ment-leger.fr>
Signed-off-by: Clement Leger <clement@...ment-leger.fr>
Co-developed-by: Guillaume Thouvenin <gthouvenin@...ray.eu>
Signed-off-by: Guillaume Thouvenin <gthouvenin@...ray.eu>
Co-developed-by: Julian Vetter <jvetter@...ray.eu>
Signed-off-by: Julian Vetter <jvetter@...ray.eu>
Signed-off-by: Jules Maselbas <jmaselbas@...ray.eu>
Signed-off-by: Yann Sionneau <ysionneau@...ray.eu>
---
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 <linux/seq_file.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/cpu.h>
+#include <linux/of.h>
+
+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);
--
2.37.2
Powered by blists - more mailing lists