These changes are the raw update to linux-4.4.6-rt14. Kernel sources

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

diff --git a/kernel/arch/s390/kernel/diag.c b/kernel/arch/s390/kernel/diag.c
index 2f69243..48b37b8 100644 (file)
--- a/kernel/arch/s390/kernel/diag.c
+++ b/kernel/arch/s390/kernel/diag.c
@@ -6,12 +6,137 @@
  */
 
 #include <linux/module.h>
+#include <linux/cpu.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
 #include <asm/diag.h>
+#include <asm/trace/diag.h>
+
+struct diag_stat {
+       unsigned int counter[NR_DIAG_STAT];
+};
+
+static DEFINE_PER_CPU(struct diag_stat, diag_stat);
+
+struct diag_desc {
+       int code;
+       char *name;
+};
+
+static const struct diag_desc diag_map[NR_DIAG_STAT] = {
+       [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
+       [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
+       [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
+       [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
+       [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
+       [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
+       [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
+       [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
+       [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
+       [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
+       [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
+       [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
+       [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
+       [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
+       [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
+       [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
+       [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
+       [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
+       [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
+};
+
+static int show_diag_stat(struct seq_file *m, void *v)
+{
+       struct diag_stat *stat;
+       unsigned long n = (unsigned long) v - 1;
+       int cpu, prec, tmp;
+
+       get_online_cpus();
+       if (n == 0) {
+               seq_puts(m, "         ");
+
+               for_each_online_cpu(cpu) {
+                       prec = 10;
+                       for (tmp = 10; cpu >= tmp; tmp *= 10)
+                               prec--;
+                       seq_printf(m, "%*s%d", prec, "CPU", cpu);
+               }
+               seq_putc(m, '\n');
+       } else if (n <= NR_DIAG_STAT) {
+               seq_printf(m, "diag %03x:", diag_map[n-1].code);
+               for_each_online_cpu(cpu) {
+                       stat = &per_cpu(diag_stat, cpu);
+                       seq_printf(m, " %10u", stat->counter[n-1]);
+               }
+               seq_printf(m, "    %s\n", diag_map[n-1].name);
+       }
+       put_online_cpus();
+       return 0;
+}
+
+static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
+{
+       return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
+}
+
+static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
+{
+       ++*pos;
+       return show_diag_stat_start(m, pos);
+}
+
+static void show_diag_stat_stop(struct seq_file *m, void *v)
+{
+}
+
+static const struct seq_operations show_diag_stat_sops = {
+       .start  = show_diag_stat_start,
+       .next   = show_diag_stat_next,
+       .stop   = show_diag_stat_stop,
+       .show   = show_diag_stat,
+};
+
+static int show_diag_stat_open(struct inode *inode, struct file *file)
+{
+       return seq_open(file, &show_diag_stat_sops);
+}
+
+static const struct file_operations show_diag_stat_fops = {
+       .open           = show_diag_stat_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = seq_release,
+};
+
+
+static int __init show_diag_stat_init(void)
+{
+       debugfs_create_file("diag_stat", 0400, NULL, NULL,
+                           &show_diag_stat_fops);
+       return 0;
+}
+
+device_initcall(show_diag_stat_init);
+
+void diag_stat_inc(enum diag_stat_enum nr)
+{
+       this_cpu_inc(diag_stat.counter[nr]);
+       trace_s390_diagnose(diag_map[nr].code);
+}
+EXPORT_SYMBOL(diag_stat_inc);
+
+void diag_stat_inc_norecursion(enum diag_stat_enum nr)
+{
+       this_cpu_inc(diag_stat.counter[nr]);
+       trace_s390_diagnose_norecursion(diag_map[nr].code);
+}
+EXPORT_SYMBOL(diag_stat_inc_norecursion);
 
 /*
  * Diagnose 14: Input spool file manipulation
  */
-int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
+static inline int __diag14(unsigned long rx, unsigned long ry1,
+                          unsigned long subcode)
 {
        register unsigned long _ry1 asm("2") = ry1;
        register unsigned long _ry2 asm("3") = subcode;
@@ -29,6 +154,12 @@ int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
 
        return rc;
 }
+
+int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
+{
+       diag_stat_inc(DIAG_STAT_X014);
+       return __diag14(rx, ry1, subcode);
+}
 EXPORT_SYMBOL(diag14);
 
 /*
@@ -48,6 +179,7 @@ int diag210(struct diag210 *addr)
        spin_lock_irqsave(&diag210_lock, flags);
        diag210_tmp = *addr;
 
+       diag_stat_inc(DIAG_STAT_X210);
        asm volatile(
                "       lhi     %0,-1\n"
                "       sam31\n"