This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / platforms / pseries / hvCall_inst.c

diff --git a/arch/powerpc/platforms/pseries/hvCall_inst.c b/arch/powerpc/platforms/pseries/hvCall_inst.c
new file mode 100644 (file)
index 0000000..3ddc049
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/hvCall_inst.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2006 Mike Kravetz IBM Corporation
+ *
+ * Hypervisor Call Instrumentation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/percpu.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/cpumask.h>
+#include <asm/hvcall.h>
+#include <asm/firmware.h>
+#include <asm/cputable.h>
+
+DEFINE_PER_CPU(struct hcall_stats[HCALL_STAT_ARRAY_SIZE], hcall_stats);
+
+/*
+ * Routines for displaying the statistics in debugfs
+ */
+static void *hc_start(struct seq_file *m, loff_t *pos)
+{
+       if ((int)*pos < (HCALL_STAT_ARRAY_SIZE-1))
+               return (void *)(unsigned long)(*pos + 1);
+
+       return NULL;
+}
+
+static void *hc_next(struct seq_file *m, void *p, loff_t * pos)
+{
+       ++*pos;
+
+       return hc_start(m, pos);
+}
+
+static void hc_stop(struct seq_file *m, void *p)
+{
+}
+
+static int hc_show(struct seq_file *m, void *p)
+{
+       unsigned long h_num = (unsigned long)p;
+       struct hcall_stats *hs = (struct hcall_stats *)m->private;
+
+       if (hs[h_num].num_calls) {
+               if (cpu_has_feature(CPU_FTR_PURR))
+                       seq_printf(m, "%lu %lu %lu %lu\n", h_num<<2,
+                                  hs[h_num].num_calls,
+                                  hs[h_num].tb_total,
+                                  hs[h_num].purr_total);
+               else
+                       seq_printf(m, "%lu %lu %lu\n", h_num<<2,
+                                  hs[h_num].num_calls,
+                                  hs[h_num].tb_total);
+       }
+
+       return 0;
+}
+
+static struct seq_operations hcall_inst_seq_ops = {
+        .start = hc_start,
+        .next  = hc_next,
+        .stop  = hc_stop,
+        .show  = hc_show
+};
+
+static int hcall_inst_seq_open(struct inode *inode, struct file *file)
+{
+       int rc;
+       struct seq_file *seq;
+
+       rc = seq_open(file, &hcall_inst_seq_ops);
+       seq = file->private_data;
+       seq->private = file->f_path.dentry->d_inode->i_private;
+
+       return rc;
+}
+
+static struct file_operations hcall_inst_seq_fops = {
+       .open = hcall_inst_seq_open,
+       .read = seq_read,
+       .llseek = seq_lseek,
+       .release = seq_release,
+};
+
+#define        HCALL_ROOT_DIR          "hcall_inst"
+#define CPU_NAME_BUF_SIZE      32
+
+static int __init hcall_inst_init(void)
+{
+       struct dentry *hcall_root;
+       struct dentry *hcall_file;
+       char cpu_name_buf[CPU_NAME_BUF_SIZE];
+       int cpu;
+
+       if (!firmware_has_feature(FW_FEATURE_LPAR))
+               return 0;
+
+       hcall_root = debugfs_create_dir(HCALL_ROOT_DIR, NULL);
+       if (!hcall_root)
+               return -ENOMEM;
+
+       for_each_possible_cpu(cpu) {
+               snprintf(cpu_name_buf, CPU_NAME_BUF_SIZE, "cpu%d", cpu);
+               hcall_file = debugfs_create_file(cpu_name_buf, S_IRUGO,
+                                                hcall_root,
+                                                per_cpu(hcall_stats, cpu),
+                                                &hcall_inst_seq_fops);
+               if (!hcall_file)
+                       return -ENOMEM;
+       }
+
+       return 0;
+}
+__initcall(hcall_inst_init);