projects / mirror_ubuntu-eoan-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 395d31d4 MS |
1 | /* |
| 2 | * arch/s390/kernel/processor.c | |
| 3 | * | |
| 4 | * Copyright IBM Corp. 2008 | |
| 5 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) | |
| 6 | */ | |
| 7 | ||
| 8 | #define KMSG_COMPONENT "cpu" | |
| 9 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
| 10 | ||
| 11 | #include <linux/kernel.h> | |
| 12 | #include <linux/init.h> | |
| 13 | #include <linux/smp.h> | |
| 14 | #include <linux/seq_file.h> | |
| 15 | #include <linux/delay.h> | |
| 16 | ||
| 17 | #include <asm/elf.h> | |
| 18 | #include <asm/lowcore.h> | |
| 19 | #include <asm/param.h> | |
| 20 | ||
| 21 | void __cpuinit print_cpu_info(struct cpuinfo_S390 *cpuinfo) | |
| 22 | { | |
| 23 | pr_info("Processor %d started, address %d, identification %06X\n", | |
| 24 | cpuinfo->cpu_nr, cpuinfo->cpu_addr, cpuinfo->cpu_id.ident); | |
| 25 | } | |
| 26 | ||
| 27 | /* | |
| 28 | * show_cpuinfo - Get information on one CPU for use by procfs. | |
| 29 | */ | |
| 30 | ||
| 31 | static int show_cpuinfo(struct seq_file *m, void *v) | |
| 32 | { | |
| 33 | static const char *hwcap_str[8] = { | |
| 34 | "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp", | |
| 35 | "edat" | |
| 36 | }; | |
| 37 | struct cpuinfo_S390 *cpuinfo; | |
| 38 | unsigned long n = (unsigned long) v - 1; | |
| 39 | int i; | |
| 40 | ||
| 41 | s390_adjust_jiffies(); | |
| 42 | preempt_disable(); | |
| 43 | if (!n) { | |
| 44 | seq_printf(m, "vendor_id : IBM/S390\n" | |
| 45 | "# processors : %i\n" | |
| 46 | "bogomips per cpu: %lu.%02lu\n", | |
| 47 | num_online_cpus(), loops_per_jiffy/(500000/HZ), | |
| 48 | (loops_per_jiffy/(5000/HZ))%100); | |
| 49 | seq_puts(m, "features\t: "); | |
| 50 | for (i = 0; i < 8; i++) | |
| 51 | if (hwcap_str[i] && (elf_hwcap & (1UL << i))) | |
| 52 | seq_printf(m, "%s ", hwcap_str[i]); | |
| 53 | seq_puts(m, "\n"); | |
| 54 | } | |
| 55 | ||
| 56 | if (cpu_online(n)) { | |
| 57 | #ifdef CONFIG_SMP | |
| 58 | if (smp_processor_id() == n) | |
| 59 | cpuinfo = &S390_lowcore.cpu_data; | |
| 60 | else | |
| 61 | cpuinfo = &lowcore_ptr[n]->cpu_data; | |
| 62 | #else | |
| 63 | cpuinfo = &S390_lowcore.cpu_data; | |
| 64 | #endif | |
| 65 | seq_printf(m, "processor %li: " | |
| 66 | "version = %02X, " | |
| 67 | "identification = %06X, " | |
| 68 | "machine = %04X\n", | |
| 69 | n, cpuinfo->cpu_id.version, | |
| 70 | cpuinfo->cpu_id.ident, | |
| 71 | cpuinfo->cpu_id.machine); | |
| 72 | } | |
| 73 | preempt_enable(); | |
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | static void *c_start(struct seq_file *m, loff_t *pos) | |
| 78 | { | |
| 79 | return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; | |
| 80 | } | |
| 81 | ||
| 82 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
| 83 | { | |
| 84 | ++*pos; | |
| 85 | return c_start(m, pos); | |
| 86 | } | |
| 87 | ||
| 88 | static void c_stop(struct seq_file *m, void *v) | |
| 89 | { | |
| 90 | } | |
| 91 | ||
| 92 | const struct seq_operations cpuinfo_op = { | |
| 93 | .start = c_start, | |
| 94 | .next = c_next, | |
| 95 | .stop = c_stop, | |
| 96 | .show = show_cpuinfo, | |
| 97 | }; | |
| 98 |