1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
* 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>
#include <asm/trace.h>
#include <asm/machdep.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 = 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 const 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_inode(file)->i_private;
return rc;
}
static const 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 void probe_hcall_entry(void *ignored, unsigned long opcode, unsigned long *args)
{
struct hcall_stats *h;
if (opcode > MAX_HCALL_OPCODE)
return;
h = this_cpu_ptr(&hcall_stats[opcode / 4]);
h->tb_start = mftb();
h->purr_start = mfspr(SPRN_PURR);
}
static void probe_hcall_exit(void *ignored, unsigned long opcode, unsigned long retval,
unsigned long *retbuf)
{
struct hcall_stats *h;
if (opcode > MAX_HCALL_OPCODE)
return;
h = this_cpu_ptr(&hcall_stats[opcode / 4]);
h->num_calls++;
h->tb_total += mftb() - h->tb_start;
h->purr_total += mfspr(SPRN_PURR) - h->purr_start;
}
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;
if (register_trace_hcall_entry(probe_hcall_entry, NULL))
return -EINVAL;
if (register_trace_hcall_exit(probe_hcall_exit, NULL)) {
unregister_trace_hcall_entry(probe_hcall_entry, NULL);
return -EINVAL;
}
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;
}
machine_device_initcall(pseries, hcall_inst_init);
|
