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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2025 IBM Corporation, Srish Srinivasan <ssrish@linux.ibm.com>
*
* This code exposes PLPKS config to user via sysfs
*/
#define pr_fmt(fmt) "plpks-sysfs: "fmt
#include <linux/init.h>
#include <linux/printk.h>
#include <linux/types.h>
#include <asm/machdep.h>
#include <asm/plpks.h>
/* config attributes for sysfs */
#define PLPKS_CONFIG_ATTR(name, fmt, func) \
static ssize_t name##_show(struct kobject *kobj, \
struct kobj_attribute *attr, \
char *buf) \
{ \
return sysfs_emit(buf, fmt, func()); \
} \
static struct kobj_attribute attr_##name = __ATTR_RO(name)
PLPKS_CONFIG_ATTR(version, "%u\n", plpks_get_version);
PLPKS_CONFIG_ATTR(max_object_size, "%u\n", plpks_get_maxobjectsize);
PLPKS_CONFIG_ATTR(total_size, "%u\n", plpks_get_totalsize);
PLPKS_CONFIG_ATTR(used_space, "%u\n", plpks_get_usedspace);
PLPKS_CONFIG_ATTR(supported_policies, "%08x\n", plpks_get_supportedpolicies);
PLPKS_CONFIG_ATTR(signed_update_algorithms, "%016llx\n",
plpks_get_signedupdatealgorithms);
PLPKS_CONFIG_ATTR(wrapping_features, "%016llx\n", plpks_get_wrappingfeatures);
static const struct attribute *config_attrs[] = {
&attr_version.attr,
&attr_max_object_size.attr,
&attr_total_size.attr,
&attr_used_space.attr,
&attr_supported_policies.attr,
&attr_signed_update_algorithms.attr,
&attr_wrapping_features.attr,
NULL,
};
static struct kobject *plpks_kobj, *plpks_config_kobj;
int plpks_config_create_softlink(struct kobject *from)
{
if (!plpks_config_kobj)
return -EINVAL;
return sysfs_create_link(from, plpks_config_kobj, "config");
}
static __init int plpks_sysfs_config(struct kobject *kobj)
{
struct attribute_group config_group = {
.name = NULL,
.attrs = (struct attribute **)config_attrs,
};
return sysfs_create_group(kobj, &config_group);
}
static __init int plpks_sysfs_init(void)
{
int rc;
if (!plpks_is_available())
return -ENODEV;
plpks_kobj = kobject_create_and_add("plpks", firmware_kobj);
if (!plpks_kobj) {
pr_err("Failed to create plpks kobj\n");
return -ENOMEM;
}
plpks_config_kobj = kobject_create_and_add("config", plpks_kobj);
if (!plpks_config_kobj) {
pr_err("Failed to create plpks config kobj\n");
kobject_put(plpks_kobj);
return -ENOMEM;
}
rc = plpks_sysfs_config(plpks_config_kobj);
if (rc) {
pr_err("Failed to create attribute group for plpks config\n");
kobject_put(plpks_config_kobj);
kobject_put(plpks_kobj);
return rc;
}
return 0;
}
machine_subsys_initcall(pseries, plpks_sysfs_init);
|
