6b72cd9ef0
The notifier hook mechanism in proc and cpuinfo is actually unnecessary
for LoongArch because it's not used anywhere.
It was originally added to the MIPS code in commit d6d3c9afaa ("MIPS:
MT: proc: Add support for printing VPE and TC ids"), and LoongArch then
inherited it.
But as the kernel code stands now, this notifier hook mechanism doesn't
really make sense for either LoongArch or MIPS.
In addition, the seq_file forward declaration needs to be moved to its
proper place, as only the show_ipi_list() function in smp.c requires it.
Co-developed-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Yuli Wang <wangyuli@uniontech.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <asm/bootinfo.h>
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#include <asm/cpu.h>
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#include <asm/cpu-features.h>
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#include <asm/idle.h>
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#include <asm/processor.h>
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#include <asm/time.h>
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static int show_cpuinfo(struct seq_file *m, void *v)
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{
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unsigned long n = (unsigned long) v - 1;
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unsigned int isa = cpu_data[n].isa_level;
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unsigned int version = cpu_data[n].processor_id & 0xff;
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unsigned int fp_version = cpu_data[n].fpu_vers;
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#ifdef CONFIG_SMP
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if (!cpu_online(n))
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return 0;
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#endif
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/*
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* For the first processor also print the system type
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*/
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if (n == 0)
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seq_printf(m, "system type\t\t: %s\n\n", get_system_type());
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seq_printf(m, "processor\t\t: %ld\n", n);
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seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);
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seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);
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seq_printf(m, "global_id\t\t: %d\n", cpu_data[n].global_id);
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seq_printf(m, "CPU Family\t\t: %s\n", __cpu_family[n]);
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seq_printf(m, "Model Name\t\t: %s\n", __cpu_full_name[n]);
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seq_printf(m, "CPU Revision\t\t: 0x%02x\n", version);
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seq_printf(m, "FPU Revision\t\t: 0x%02x\n", fp_version);
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seq_printf(m, "CPU MHz\t\t\t: %llu.%02llu\n",
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cpu_clock_freq / 1000000, (cpu_clock_freq / 10000) % 100);
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seq_printf(m, "BogoMIPS\t\t: %llu.%02llu\n",
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(lpj_fine * cpu_clock_freq / const_clock_freq) / (500000/HZ),
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((lpj_fine * cpu_clock_freq / const_clock_freq) / (5000/HZ)) % 100);
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seq_printf(m, "TLB Entries\t\t: %d\n", cpu_data[n].tlbsize);
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seq_printf(m, "Address Sizes\t\t: %d bits physical, %d bits virtual\n",
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cpu_pabits + 1, cpu_vabits + 1);
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seq_printf(m, "ISA\t\t\t:");
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if (isa & LOONGARCH_CPU_ISA_LA32R)
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seq_printf(m, " loongarch32r");
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if (isa & LOONGARCH_CPU_ISA_LA32S)
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seq_printf(m, " loongarch32s");
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if (isa & LOONGARCH_CPU_ISA_LA64)
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seq_printf(m, " loongarch64");
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seq_printf(m, "\n");
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seq_printf(m, "Features\t\t:");
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if (cpu_has_cpucfg) seq_printf(m, " cpucfg");
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if (cpu_has_lam) seq_printf(m, " lam");
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if (cpu_has_ual) seq_printf(m, " ual");
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if (cpu_has_fpu) seq_printf(m, " fpu");
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if (cpu_has_lsx) seq_printf(m, " lsx");
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if (cpu_has_lasx) seq_printf(m, " lasx");
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if (cpu_has_crc32) seq_printf(m, " crc32");
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if (cpu_has_complex) seq_printf(m, " complex");
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if (cpu_has_crypto) seq_printf(m, " crypto");
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if (cpu_has_ptw) seq_printf(m, " ptw");
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if (cpu_has_lspw) seq_printf(m, " lspw");
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if (cpu_has_lvz) seq_printf(m, " lvz");
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if (cpu_has_lbt_x86) seq_printf(m, " lbt_x86");
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if (cpu_has_lbt_arm) seq_printf(m, " lbt_arm");
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if (cpu_has_lbt_mips) seq_printf(m, " lbt_mips");
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seq_printf(m, "\n");
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seq_printf(m, "Hardware Watchpoint\t: %s", str_yes_no(cpu_has_watch));
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if (cpu_has_watch) {
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seq_printf(m, ", iwatch count: %d, dwatch count: %d",
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cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count);
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}
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seq_printf(m, "\n\n");
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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unsigned long i = *pos;
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return i < nr_cpu_ids ? (void *)(i + 1) : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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const struct seq_operations cpuinfo_op = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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