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-rw-r--r--arch/s390/kernel/processor.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
new file mode 100644
index 000000000..dc488e13b
--- /dev/null
+++ b/arch/s390/kernel/processor.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright IBM Corp. 2008
+ * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ */
+
+#define KMSG_COMPONENT "cpu"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/delay.h>
+#include <linux/cpu.h>
+#include <asm/elf.h>
+#include <asm/lowcore.h>
+#include <asm/param.h>
+#include <asm/smp.h>
+
+static DEFINE_PER_CPU(struct cpuid, cpu_id);
+
+void notrace cpu_relax(void)
+{
+ if (!smp_cpu_mtid && MACHINE_HAS_DIAG44)
+ asm volatile("diag 0,0,0x44");
+ barrier();
+}
+EXPORT_SYMBOL(cpu_relax);
+
+/*
+ * cpu_init - initializes state that is per-CPU.
+ */
+void cpu_init(void)
+{
+ struct cpuid *id = this_cpu_ptr(&cpu_id);
+
+ get_cpu_id(id);
+ atomic_inc(&init_mm.mm_count);
+ current->active_mm = &init_mm;
+ BUG_ON(current->mm);
+ enter_lazy_tlb(&init_mm, current);
+}
+
+/*
+ * show_cpuinfo - Get information on one CPU for use by procfs.
+ */
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+ static const char *hwcap_str[] = {
+ "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
+ "edat", "etf3eh", "highgprs", "te", "vx"
+ };
+ unsigned long n = (unsigned long) v - 1;
+ int i;
+
+ if (!n) {
+ s390_adjust_jiffies();
+ seq_printf(m, "vendor_id : IBM/S390\n"
+ "# processors : %i\n"
+ "bogomips per cpu: %lu.%02lu\n",
+ num_online_cpus(), loops_per_jiffy/(500000/HZ),
+ (loops_per_jiffy/(5000/HZ))%100);
+ seq_puts(m, "features\t: ");
+ for (i = 0; i < ARRAY_SIZE(hwcap_str); i++)
+ if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
+ seq_printf(m, "%s ", hwcap_str[i]);
+ seq_puts(m, "\n");
+ show_cacheinfo(m);
+ }
+ get_online_cpus();
+ if (cpu_online(n)) {
+ struct cpuid *id = &per_cpu(cpu_id, n);
+ seq_printf(m, "processor %li: "
+ "version = %02X, "
+ "identification = %06X, "
+ "machine = %04X\n",
+ n, id->version, id->ident, id->machine);
+ }
+ put_online_cpus();
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ 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,
+};
+