1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2024
4 */
5
6 #define KMSG_COMPONENT "cpacf"
7 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
8
9 #include <linux/cpu.h>
10 #include <linux/device.h>
11 #include <linux/sysfs.h>
12 #include <asm/cpacf.h>
13
14 #define CPACF_QUERY(name, instruction) \
15 static ssize_t name##_query_raw_read(struct file *fp, \
16 struct kobject *kobj, \
17 struct bin_attribute *attr, \
18 char *buf, loff_t offs, \
19 size_t count) \
20 { \
21 cpacf_mask_t mask; \
22 \
23 if (!cpacf_query(CPACF_##instruction, &mask)) \
24 return -EOPNOTSUPP; \
25 return memory_read_from_buffer(buf, count, &offs, &mask, sizeof(mask)); \
26 } \
27 static BIN_ATTR_RO(name##_query_raw, sizeof(cpacf_mask_t))
28
29 CPACF_QUERY(km, KM);
30 CPACF_QUERY(kmc, KMC);
31 CPACF_QUERY(kimd, KIMD);
32 CPACF_QUERY(klmd, KLMD);
33 CPACF_QUERY(kmac, KMAC);
34 CPACF_QUERY(pckmo, PCKMO);
35 CPACF_QUERY(kmf, KMF);
36 CPACF_QUERY(kmctr, KMCTR);
37 CPACF_QUERY(kmo, KMO);
38 CPACF_QUERY(pcc, PCC);
39 CPACF_QUERY(prno, PRNO);
40 CPACF_QUERY(kma, KMA);
41 CPACF_QUERY(kdsa, KDSA);
42
43 #define CPACF_QAI(name, instruction) \
44 static ssize_t name##_query_auth_info_raw_read( \
45 struct file *fp, struct kobject *kobj, \
46 struct bin_attribute *attr, char *buf, loff_t offs, \
47 size_t count) \
48 { \
49 cpacf_qai_t qai; \
50 \
51 if (!cpacf_qai(CPACF_##instruction, &qai)) \
52 return -EOPNOTSUPP; \
53 return memory_read_from_buffer(buf, count, &offs, &qai, \
54 sizeof(qai)); \
55 } \
56 static BIN_ATTR_RO(name##_query_auth_info_raw, sizeof(cpacf_qai_t))
57
58 CPACF_QAI(km, KM);
59 CPACF_QAI(kmc, KMC);
60 CPACF_QAI(kimd, KIMD);
61 CPACF_QAI(klmd, KLMD);
62 CPACF_QAI(kmac, KMAC);
63 CPACF_QAI(pckmo, PCKMO);
64 CPACF_QAI(kmf, KMF);
65 CPACF_QAI(kmctr, KMCTR);
66 CPACF_QAI(kmo, KMO);
67 CPACF_QAI(pcc, PCC);
68 CPACF_QAI(prno, PRNO);
69 CPACF_QAI(kma, KMA);
70 CPACF_QAI(kdsa, KDSA);
71
72 static struct bin_attribute *cpacf_attrs[] = {
73 &bin_attr_km_query_raw,
74 &bin_attr_kmc_query_raw,
75 &bin_attr_kimd_query_raw,
76 &bin_attr_klmd_query_raw,
77 &bin_attr_kmac_query_raw,
78 &bin_attr_pckmo_query_raw,
79 &bin_attr_kmf_query_raw,
80 &bin_attr_kmctr_query_raw,
81 &bin_attr_kmo_query_raw,
82 &bin_attr_pcc_query_raw,
83 &bin_attr_prno_query_raw,
84 &bin_attr_kma_query_raw,
85 &bin_attr_kdsa_query_raw,
86 &bin_attr_km_query_auth_info_raw,
87 &bin_attr_kmc_query_auth_info_raw,
88 &bin_attr_kimd_query_auth_info_raw,
89 &bin_attr_klmd_query_auth_info_raw,
90 &bin_attr_kmac_query_auth_info_raw,
91 &bin_attr_pckmo_query_auth_info_raw,
92 &bin_attr_kmf_query_auth_info_raw,
93 &bin_attr_kmctr_query_auth_info_raw,
94 &bin_attr_kmo_query_auth_info_raw,
95 &bin_attr_pcc_query_auth_info_raw,
96 &bin_attr_prno_query_auth_info_raw,
97 &bin_attr_kma_query_auth_info_raw,
98 &bin_attr_kdsa_query_auth_info_raw,
99 NULL,
100 };
101
102 static const struct attribute_group cpacf_attr_grp = {
103 .name = "cpacf",
104 .bin_attrs = cpacf_attrs,
105 };
106
107 static int __init cpacf_init(void)
108 {
109 struct device *cpu_root;
110 int rc = 0;
111
112 cpu_root = bus_get_dev_root(&cpu_subsys);
113 if (cpu_root) {
114 rc = sysfs_create_group(&cpu_root->kobj, &cpacf_attr_grp);
115 put_device(cpu_root);
116 }
117 return rc;
118 }
119 device_initcall(cpacf_init);
120
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