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) \ 14 static 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 } \ 26 static const BIN_ATTR_RO(name##_query_raw, sizeof(cpacf_mask_t)) 27 28 CPACF_QUERY(km, KM); 29 CPACF_QUERY(kmc, KMC); 30 CPACF_QUERY(kimd, KIMD); 31 CPACF_QUERY(klmd, KLMD); 32 CPACF_QUERY(kmac, KMAC); 33 CPACF_QUERY(pckmo, PCKMO); 34 CPACF_QUERY(kmf, KMF); 35 CPACF_QUERY(kmctr, KMCTR); 36 CPACF_QUERY(kmo, KMO); 37 CPACF_QUERY(pcc, PCC); 38 CPACF_QUERY(prno, PRNO); 39 CPACF_QUERY(kma, KMA); 40 CPACF_QUERY(kdsa, KDSA); 41 42 #define CPACF_QAI(name, instruction) \ 43 static 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 } \ 55 static const BIN_ATTR_RO(name##_query_auth_info_raw, sizeof(cpacf_qai_t)) 56 57 CPACF_QAI(km, KM); 58 CPACF_QAI(kmc, KMC); 59 CPACF_QAI(kimd, KIMD); 60 CPACF_QAI(klmd, KLMD); 61 CPACF_QAI(kmac, KMAC); 62 CPACF_QAI(pckmo, PCKMO); 63 CPACF_QAI(kmf, KMF); 64 CPACF_QAI(kmctr, KMCTR); 65 CPACF_QAI(kmo, KMO); 66 CPACF_QAI(pcc, PCC); 67 CPACF_QAI(prno, PRNO); 68 CPACF_QAI(kma, KMA); 69 CPACF_QAI(kdsa, KDSA); 70 71 static 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 }; 100 101 static const struct attribute_group cpacf_attr_grp = { 102 .name = "cpacf", 103 .bin_attrs = cpacf_attrs, 104 }; 105 106 static int __init cpacf_init(void) 107 { 108 struct device *cpu_root; 109 int rc = 0; 110 111 cpu_root = bus_get_dev_root(&cpu_subsys); 112 if (cpu_root) { 113 rc = sysfs_create_group(&cpu_root->kobj, &cpacf_attr_grp); 114 put_device(cpu_root); 115 } 116 return rc; 117 } 118 device_initcall(cpacf_init); 119