projects / mirror_ubuntu-eoan-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 395d31d4 | 1 | /* |
| 395d31d4 MS |
2 | * Copyright IBM Corp. 2008 |
| 3 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) | |
| 4 | */ | |
| 5 | ||
| 6 | #define KMSG_COMPONENT "cpu" | |
| 7 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
| 8 | ||
| 9 | #include <linux/kernel.h> | |
| 10 | #include <linux/init.h> | |
| 395d31d4 MS |
11 | #include <linux/seq_file.h> |
| 12 | #include <linux/delay.h> | |
| 19726cec | 13 | #include <linux/cpu.h> |
| 395d31d4 MS |
14 | #include <asm/elf.h> |
| 15 | #include <asm/lowcore.h> | |
| 16 | #include <asm/param.h> | |
| 4d92f502 | 17 | #include <asm/smp.h> |
| 395d31d4 | 18 | |
| 94038a99 MS |
19 | static DEFINE_PER_CPU(struct cpuid, cpu_id); |
| 20 | ||
| a9ca8eb7 | 21 | void notrace cpu_relax(void) |
| 4d92f502 HC |
22 | { |
| 23 | if (!smp_cpu_mtid && MACHINE_HAS_DIAG44) | |
| 24 | asm volatile("diag 0,0,0x44"); | |
| 25 | barrier(); | |
| 26 | } | |
| 27 | EXPORT_SYMBOL(cpu_relax); | |
| 28 | ||
| 94038a99 MS |
29 | /* |
| 30 | * cpu_init - initializes state that is per-CPU. | |
| 31 | */ | |
| e2741f17 | 32 | void cpu_init(void) |
| 94038a99 | 33 | { |
| eb7e7d76 | 34 | struct cpuid *id = this_cpu_ptr(&cpu_id); |
| 94038a99 MS |
35 | |
| 36 | get_cpu_id(id); | |
| 37 | atomic_inc(&init_mm.mm_count); | |
| 38 | current->active_mm = &init_mm; | |
| 39 | BUG_ON(current->mm); | |
| 40 | enter_lazy_tlb(&init_mm, current); | |
| 41 | } | |
| 42 | ||
| 395d31d4 MS |
43 | /* |
| 44 | * show_cpuinfo - Get information on one CPU for use by procfs. | |
| 45 | */ | |
| 395d31d4 MS |
46 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 47 | { | |
| fbf3c542 | 48 | static const char *hwcap_str[] = { |
| 395d31d4 | 49 | "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp", |
| 80703617 | 50 | "edat", "etf3eh", "highgprs", "te", "vx" |
| 395d31d4 | 51 | }; |
| 7b468488 MS |
52 | unsigned long n = (unsigned long) v - 1; |
| 53 | int i; | |
| 395d31d4 | 54 | |
| 7b468488 | 55 | if (!n) { |
| 8e102301 | 56 | s390_adjust_jiffies(); |
| 7b468488 MS |
57 | seq_printf(m, "vendor_id : IBM/S390\n" |
| 58 | "# processors : %i\n" | |
| 59 | "bogomips per cpu: %lu.%02lu\n", | |
| 60 | num_online_cpus(), loops_per_jiffy/(500000/HZ), | |
| 61 | (loops_per_jiffy/(5000/HZ))%100); | |
| 62 | seq_puts(m, "features\t: "); | |
| fbf3c542 | 63 | for (i = 0; i < ARRAY_SIZE(hwcap_str); i++) |
| 7b468488 MS |
64 | if (hwcap_str[i] && (elf_hwcap & (1UL << i))) |
| 65 | seq_printf(m, "%s ", hwcap_str[i]); | |
| 66 | seq_puts(m, "\n"); | |
| 6668022c | 67 | show_cacheinfo(m); |
| 7b468488 | 68 | } |
| 19726cec | 69 | get_online_cpus(); |
| 7b468488 | 70 | if (cpu_online(n)) { |
| 94038a99 | 71 | struct cpuid *id = &per_cpu(cpu_id, n); |
| 7b468488 MS |
72 | seq_printf(m, "processor %li: " |
| 73 | "version = %02X, " | |
| 74 | "identification = %06X, " | |
| 75 | "machine = %04X\n", | |
| 94038a99 | 76 | n, id->version, id->ident, id->machine); |
| 7b468488 | 77 | } |
| 19726cec | 78 | put_online_cpus(); |
| 7b468488 | 79 | return 0; |
| 395d31d4 MS |
80 | } |
| 81 | ||
| 82 | static void *c_start(struct seq_file *m, loff_t *pos) | |
| 83 | { | |
| dd4a5a31 | 84 | return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL; |
| 395d31d4 MS |
85 | } |
| 86 | ||
| 87 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
| 88 | { | |
| 89 | ++*pos; | |
| 90 | return c_start(m, pos); | |
| 91 | } | |
| 92 | ||
| 93 | static void c_stop(struct seq_file *m, void *v) | |
| 94 | { | |
| 95 | } | |
| 96 | ||
| 97 | const struct seq_operations cpuinfo_op = { | |
| 98 | .start = c_start, | |
| 99 | .next = c_next, | |
| 100 | .stop = c_stop, | |
| 101 | .show = show_cpuinfo, | |
| 102 | }; | |
| 103 |