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)						\
 15static 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}										\
 27static BIN_ATTR_RO(name##_query_raw, sizeof(cpacf_mask_t))
 28
 29CPACF_QUERY(km, KM);
 30CPACF_QUERY(kmc, KMC);
 31CPACF_QUERY(kimd, KIMD);
 32CPACF_QUERY(klmd, KLMD);
 33CPACF_QUERY(kmac, KMAC);
 34CPACF_QUERY(pckmo, PCKMO);
 35CPACF_QUERY(kmf, KMF);
 36CPACF_QUERY(kmctr, KMCTR);
 37CPACF_QUERY(kmo, KMO);
 38CPACF_QUERY(pcc, PCC);
 39CPACF_QUERY(prno, PRNO);
 40CPACF_QUERY(kma, KMA);
 41CPACF_QUERY(kdsa, KDSA);
 42
 43#define CPACF_QAI(name, instruction)				\
 44static 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}								\
 56static BIN_ATTR_RO(name##_query_auth_info_raw, sizeof(cpacf_qai_t))
 57
 58CPACF_QAI(km, KM);
 59CPACF_QAI(kmc, KMC);
 60CPACF_QAI(kimd, KIMD);
 61CPACF_QAI(klmd, KLMD);
 62CPACF_QAI(kmac, KMAC);
 63CPACF_QAI(pckmo, PCKMO);
 64CPACF_QAI(kmf, KMF);
 65CPACF_QAI(kmctr, KMCTR);
 66CPACF_QAI(kmo, KMO);
 67CPACF_QAI(pcc, PCC);
 68CPACF_QAI(prno, PRNO);
 69CPACF_QAI(kma, KMA);
 70CPACF_QAI(kdsa, KDSA);
 71
 72static 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
102static const struct attribute_group cpacf_attr_grp = {
103	.name = "cpacf",
104	.bin_attrs = cpacf_attrs,
105};
106
107static 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}
119device_initcall(cpacf_init);