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

source code of linux/arch/s390/kernel/cpacf.c