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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3057739138
This allows the kernel to correctly detect an R16000 MIPS CPU on systems that have those. Otherwise, such systems will detect the CPU as an R14000, due to similarities in the CPU PRId value. Signed-off-by: Joshua Kinard <kumba@gentoo.org> Cc: Linux MIPS List <linux-mips@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/9092/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
147 lines
3.1 KiB
C
147 lines
3.1 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2004, 2005 Ralf Baechle
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* Copyright (C) 2005 MIPS Technologies, Inc.
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*/
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#include <linux/compiler.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/oprofile.h>
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#include <linux/smp.h>
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#include <asm/cpu-info.h>
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#include <asm/cpu-type.h>
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#include "op_impl.h"
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extern struct op_mips_model op_model_mipsxx_ops __weak;
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extern struct op_mips_model op_model_loongson2_ops __weak;
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extern struct op_mips_model op_model_loongson3_ops __weak;
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static struct op_mips_model *model;
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static struct op_counter_config ctr[20];
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static int op_mips_setup(void)
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{
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/* Pre-compute the values to stuff in the hardware registers. */
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model->reg_setup(ctr);
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/* Configure the registers on all cpus. */
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on_each_cpu(model->cpu_setup, NULL, 1);
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return 0;
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}
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static int op_mips_create_files(struct dentry *root)
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{
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int i;
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for (i = 0; i < model->num_counters; ++i) {
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struct dentry *dir;
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char buf[4];
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snprintf(buf, sizeof buf, "%d", i);
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dir = oprofilefs_mkdir(root, buf);
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oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
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oprofilefs_create_ulong(dir, "event", &ctr[i].event);
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oprofilefs_create_ulong(dir, "count", &ctr[i].count);
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oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
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oprofilefs_create_ulong(dir, "user", &ctr[i].user);
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oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
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/* Dummy. */
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oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
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}
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return 0;
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}
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static int op_mips_start(void)
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{
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on_each_cpu(model->cpu_start, NULL, 1);
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return 0;
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}
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static void op_mips_stop(void)
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{
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/* Disable performance monitoring for all counters. */
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on_each_cpu(model->cpu_stop, NULL, 1);
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}
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int __init oprofile_arch_init(struct oprofile_operations *ops)
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{
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struct op_mips_model *lmodel = NULL;
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int res;
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switch (current_cpu_type()) {
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case CPU_5KC:
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case CPU_M14KC:
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case CPU_M14KEC:
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case CPU_20KC:
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case CPU_24K:
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case CPU_25KF:
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case CPU_34K:
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case CPU_1004K:
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case CPU_74K:
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case CPU_1074K:
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case CPU_INTERAPTIV:
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case CPU_PROAPTIV:
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case CPU_P5600:
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case CPU_M5150:
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case CPU_LOONGSON1:
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case CPU_SB1:
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case CPU_SB1A:
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case CPU_R10000:
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case CPU_R12000:
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case CPU_R14000:
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case CPU_R16000:
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case CPU_XLR:
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lmodel = &op_model_mipsxx_ops;
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break;
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case CPU_LOONGSON2:
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lmodel = &op_model_loongson2_ops;
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break;
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case CPU_LOONGSON3:
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lmodel = &op_model_loongson3_ops;
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break;
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};
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/*
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* Always set the backtrace. This allows unsupported CPU types to still
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* use timer-based oprofile.
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*/
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ops->backtrace = op_mips_backtrace;
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if (!lmodel)
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return -ENODEV;
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res = lmodel->init();
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if (res)
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return res;
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model = lmodel;
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ops->create_files = op_mips_create_files;
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ops->setup = op_mips_setup;
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//ops->shutdown = op_mips_shutdown;
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ops->start = op_mips_start;
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ops->stop = op_mips_stop;
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ops->cpu_type = lmodel->cpu_type;
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printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
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lmodel->cpu_type);
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return 0;
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}
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void oprofile_arch_exit(void)
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{
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if (model)
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model->exit();
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}
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