Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / s390 / kernel / processor.c

diff --git a/kernel/arch/s390/kernel/processor.c b/kernel/arch/s390/kernel/processor.c
new file mode 100644 (file)
index 0000000..dc488e1
--- /dev/null
+++ b/kernel/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,
+};
+