projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 57852a85 MK |
1 | /* |
| 2 | * Copyright (C) 2006 Mike Kravetz IBM Corporation | |
| 3 | * | |
| 4 | * Hypervisor Call Instrumentation | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 19 | */ | |
| 20 | ||
| 21 | #include <linux/kernel.h> | |
| 22 | #include <linux/percpu.h> | |
| 23 | #include <linux/debugfs.h> | |
| 24 | #include <linux/seq_file.h> | |
| 25 | #include <linux/cpumask.h> | |
| 26 | #include <asm/hvcall.h> | |
| 27 | #include <asm/firmware.h> | |
| 28 | #include <asm/cputable.h> | |
| 29 | ||
| 30 | DEFINE_PER_CPU(struct hcall_stats[HCALL_STAT_ARRAY_SIZE], hcall_stats); | |
| 31 | ||
| 32 | /* | |
| 33 | * Routines for displaying the statistics in debugfs | |
| 34 | */ | |
| 35 | static void *hc_start(struct seq_file *m, loff_t *pos) | |
| 36 | { | |
| dc40127c | 37 | if ((int)*pos < (HCALL_STAT_ARRAY_SIZE-1)) |
| 57852a85 MK |
38 | return (void *)(unsigned long)(*pos + 1); |
| 39 | ||
| 40 | return NULL; | |
| 41 | } | |
| 42 | ||
| 43 | static void *hc_next(struct seq_file *m, void *p, loff_t * pos) | |
| 44 | { | |
| 45 | ++*pos; | |
| 46 | ||
| 47 | return hc_start(m, pos); | |
| 48 | } | |
| 49 | ||
| 50 | static void hc_stop(struct seq_file *m, void *p) | |
| 51 | { | |
| 52 | } | |
| 53 | ||
| 54 | static int hc_show(struct seq_file *m, void *p) | |
| 55 | { | |
| 56 | unsigned long h_num = (unsigned long)p; | |
| 57 | struct hcall_stats *hs = (struct hcall_stats *)m->private; | |
| 58 | ||
| 59 | if (hs[h_num].num_calls) { | |
| dc40127c | 60 | if (cpu_has_feature(CPU_FTR_PURR)) |
| 57852a85 MK |
61 | seq_printf(m, "%lu %lu %lu %lu\n", h_num<<2, |
| 62 | hs[h_num].num_calls, | |
| 63 | hs[h_num].tb_total, | |
| 64 | hs[h_num].purr_total); | |
| 65 | else | |
| 66 | seq_printf(m, "%lu %lu %lu\n", h_num<<2, | |
| 67 | hs[h_num].num_calls, | |
| 68 | hs[h_num].tb_total); | |
| 69 | } | |
| 70 | ||
| 71 | return 0; | |
| 72 | } | |
| 73 | ||
| 88e9d34c | 74 | static const struct seq_operations hcall_inst_seq_ops = { |
| 57852a85 MK |
75 | .start = hc_start, |
| 76 | .next = hc_next, | |
| 77 | .stop = hc_stop, | |
| 78 | .show = hc_show | |
| 79 | }; | |
| 80 | ||
| 81 | static int hcall_inst_seq_open(struct inode *inode, struct file *file) | |
| 82 | { | |
| 83 | int rc; | |
| 84 | struct seq_file *seq; | |
| 85 | ||
| 86 | rc = seq_open(file, &hcall_inst_seq_ops); | |
| 87 | seq = file->private_data; | |
| b4d1ab58 | 88 | seq->private = file->f_path.dentry->d_inode->i_private; |
| 57852a85 MK |
89 | |
| 90 | return rc; | |
| 91 | } | |
| 92 | ||
| 5dfe4c96 | 93 | static const struct file_operations hcall_inst_seq_fops = { |
| 57852a85 MK |
94 | .open = hcall_inst_seq_open, |
| 95 | .read = seq_read, | |
| 96 | .llseek = seq_lseek, | |
| 97 | .release = seq_release, | |
| 98 | }; | |
| 99 | ||
| 100 | #define HCALL_ROOT_DIR "hcall_inst" | |
| 101 | #define CPU_NAME_BUF_SIZE 32 | |
| 102 | ||
| 103 | static int __init hcall_inst_init(void) | |
| 104 | { | |
| 105 | struct dentry *hcall_root; | |
| 106 | struct dentry *hcall_file; | |
| 107 | char cpu_name_buf[CPU_NAME_BUF_SIZE]; | |
| 108 | int cpu; | |
| 109 | ||
| 110 | if (!firmware_has_feature(FW_FEATURE_LPAR)) | |
| 111 | return 0; | |
| 112 | ||
| 113 | hcall_root = debugfs_create_dir(HCALL_ROOT_DIR, NULL); | |
| 114 | if (!hcall_root) | |
| 115 | return -ENOMEM; | |
| 116 | ||
| 117 | for_each_possible_cpu(cpu) { | |
| 118 | snprintf(cpu_name_buf, CPU_NAME_BUF_SIZE, "cpu%d", cpu); | |
| 119 | hcall_file = debugfs_create_file(cpu_name_buf, S_IRUGO, | |
| 120 | hcall_root, | |
| 121 | per_cpu(hcall_stats, cpu), | |
| 122 | &hcall_inst_seq_fops); | |
| 123 | if (!hcall_file) | |
| 124 | return -ENOMEM; | |
| 125 | } | |
| 126 | ||
| 127 | return 0; | |
| 128 | } | |
| 129 | __initcall(hcall_inst_init); |