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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - drivers/edac/mce_amd_inj.c
2 * A simple MCE injection facility for testing the MCE decoding code. This
3 * driver should be built as module so that it can be loaded on production
4 * kernels for testing purposes.
6 * This file may be distributed under the terms of the GNU General Public
9 * Copyright (c) 2010: Borislav Petkov <borislav.petkov@amd.com>
10 * Advanced Micro Devices Inc.
13 #include <linux/kobject.h>
14 #include <linux/sysdev.h>
15 #include <linux/edac.h>
20 struct edac_mce_attr
{
21 struct attribute attr
;
22 ssize_t (*show
) (struct kobject
*kobj
, struct edac_mce_attr
*attr
, char *buf
);
23 ssize_t (*store
)(struct kobject
*kobj
, struct edac_mce_attr
*attr
,
24 const char *buf
, size_t count
);
27 #define EDAC_MCE_ATTR(_name, _mode, _show, _store) \
28 static struct edac_mce_attr mce_attr_##_name = __ATTR(_name, _mode, _show, _store)
30 static struct kobject
*mce_kobj
;
33 * Collect all the MCi_XXX settings
35 static struct mce i_mce
;
37 #define MCE_INJECT_STORE(reg) \
38 static ssize_t edac_inject_##reg##_store(struct kobject *kobj, \
39 struct edac_mce_attr *attr, \
40 const char *data, size_t count)\
43 unsigned long value; \
45 ret = strict_strtoul(data, 16, &value); \
47 printk(KERN_ERR "Error writing MCE " #reg " field.\n"); \
54 MCE_INJECT_STORE(status
);
55 MCE_INJECT_STORE(misc
);
56 MCE_INJECT_STORE(addr
);
58 #define MCE_INJECT_SHOW(reg) \
59 static ssize_t edac_inject_##reg##_show(struct kobject *kobj, \
60 struct edac_mce_attr *attr, \
63 return sprintf(buf, "0x%016llx\n", i_mce.reg); \
66 MCE_INJECT_SHOW(status
);
67 MCE_INJECT_SHOW(misc
);
68 MCE_INJECT_SHOW(addr
);
70 EDAC_MCE_ATTR(status
, 0644, edac_inject_status_show
, edac_inject_status_store
);
71 EDAC_MCE_ATTR(misc
, 0644, edac_inject_misc_show
, edac_inject_misc_store
);
72 EDAC_MCE_ATTR(addr
, 0644, edac_inject_addr_show
, edac_inject_addr_store
);
75 * This denotes into which bank we're injecting and triggers
76 * the injection, at the same time.
78 static ssize_t
edac_inject_bank_store(struct kobject
*kobj
,
79 struct edac_mce_attr
*attr
,
80 const char *data
, size_t count
)
85 ret
= strict_strtoul(data
, 10, &value
);
87 printk(KERN_ERR
"Invalid bank value!\n");
92 if (boot_cpu_data
.x86
!= 0x15 || value
> 6) {
93 printk(KERN_ERR
"Non-existent MCE bank: %lu\n", value
);
99 amd_decode_mce(NULL
, 0, &i_mce
);
104 static ssize_t
edac_inject_bank_show(struct kobject
*kobj
,
105 struct edac_mce_attr
*attr
, char *buf
)
107 return sprintf(buf
, "%d\n", i_mce
.bank
);
110 EDAC_MCE_ATTR(bank
, 0644, edac_inject_bank_show
, edac_inject_bank_store
);
112 static struct edac_mce_attr
*sysfs_attrs
[] = { &mce_attr_status
, &mce_attr_misc
,
113 &mce_attr_addr
, &mce_attr_bank
116 static int __init
edac_init_mce_inject(void)
118 struct sysdev_class
*edac_class
= NULL
;
121 edac_class
= edac_get_sysfs_class();
125 mce_kobj
= kobject_create_and_add("mce", &edac_class
->kset
.kobj
);
127 printk(KERN_ERR
"Error creating a mce kset.\n");
132 for (i
= 0; i
< ARRAY_SIZE(sysfs_attrs
); i
++) {
133 err
= sysfs_create_file(mce_kobj
, &sysfs_attrs
[i
]->attr
);
135 printk(KERN_ERR
"Error creating %s in sysfs.\n",
136 sysfs_attrs
[i
]->attr
.name
);
137 goto err_sysfs_create
;
144 sysfs_remove_file(mce_kobj
, &sysfs_attrs
[i
]->attr
);
146 kobject_del(mce_kobj
);
149 edac_put_sysfs_class();
154 static void __exit
edac_exit_mce_inject(void)
158 for (i
= 0; i
< ARRAY_SIZE(sysfs_attrs
); i
++)
159 sysfs_remove_file(mce_kobj
, &sysfs_attrs
[i
]->attr
);
161 kobject_del(mce_kobj
);
163 edac_put_sysfs_class();
166 module_init(edac_init_mce_inject
);
167 module_exit(edac_exit_mce_inject
);
169 MODULE_LICENSE("GPL");
170 MODULE_AUTHOR("Borislav Petkov <borislav.petkov@amd.com>");
171 MODULE_AUTHOR("AMD Inc.");
172 MODULE_DESCRIPTION("MCE injection facility for testing MCE decoding");