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