cpacf.c

  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(&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}
118device_initcall(cpacf_init);