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Displays the query (fc=0) and query authentication information (fc=127) as binary in sysfs per CPACF instruction. Files are located in /sys/devices/system/cpu/cpacf/. These information can be fetched via asm already except for PCKMO because this instruction is privileged. To offer a unified interface all CPACF instructions will have this information displayed in sysfs in files <instruction>_query_raw and <instruction>_query_auth_info_raw. A new tool introduced into s390-tools called cpacfinfo will use this information to convert and display in human readable form. Suggested-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Harald Freudenberger <freude@linux.ibm.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Finn Callies <fcallies@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright IBM Corp. 2024
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*/
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#define KMSG_COMPONENT "cpacf"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/cpu.h>
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#include <linux/device.h>
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#include <linux/sysfs.h>
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#include <asm/cpacf.h>
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#define CPACF_QUERY(name, instruction) \
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static ssize_t name##_query_raw_read(struct file *fp, \
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struct kobject *kobj, \
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struct bin_attribute *attr, \
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char *buf, loff_t offs, \
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size_t count) \
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{ \
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cpacf_mask_t mask; \
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\
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if (!cpacf_query(CPACF_##instruction, &mask)) \
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return -EOPNOTSUPP; \
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return memory_read_from_buffer(buf, count, &offs, &mask, sizeof(mask)); \
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} \
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static BIN_ATTR_RO(name##_query_raw, sizeof(cpacf_mask_t))
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CPACF_QUERY(km, KM);
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CPACF_QUERY(kmc, KMC);
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CPACF_QUERY(kimd, KIMD);
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CPACF_QUERY(klmd, KLMD);
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CPACF_QUERY(kmac, KMAC);
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CPACF_QUERY(pckmo, PCKMO);
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CPACF_QUERY(kmf, KMF);
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CPACF_QUERY(kmctr, KMCTR);
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CPACF_QUERY(kmo, KMO);
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CPACF_QUERY(pcc, PCC);
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CPACF_QUERY(prno, PRNO);
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CPACF_QUERY(kma, KMA);
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CPACF_QUERY(kdsa, KDSA);
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#define CPACF_QAI(name, instruction) \
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static ssize_t name##_query_auth_info_raw_read( \
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struct file *fp, struct kobject *kobj, \
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struct bin_attribute *attr, char *buf, loff_t offs, \
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size_t count) \
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{ \
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cpacf_qai_t qai; \
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\
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if (!cpacf_qai(CPACF_##instruction, &qai)) \
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return -EOPNOTSUPP; \
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return memory_read_from_buffer(buf, count, &offs, &qai, \
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sizeof(qai)); \
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} \
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static BIN_ATTR_RO(name##_query_auth_info_raw, sizeof(cpacf_qai_t))
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CPACF_QAI(km, KM);
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CPACF_QAI(kmc, KMC);
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CPACF_QAI(kimd, KIMD);
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CPACF_QAI(klmd, KLMD);
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CPACF_QAI(kmac, KMAC);
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CPACF_QAI(pckmo, PCKMO);
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CPACF_QAI(kmf, KMF);
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CPACF_QAI(kmctr, KMCTR);
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CPACF_QAI(kmo, KMO);
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CPACF_QAI(pcc, PCC);
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CPACF_QAI(prno, PRNO);
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CPACF_QAI(kma, KMA);
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CPACF_QAI(kdsa, KDSA);
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static struct bin_attribute *cpacf_attrs[] = {
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&bin_attr_km_query_raw,
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&bin_attr_kmc_query_raw,
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&bin_attr_kimd_query_raw,
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&bin_attr_klmd_query_raw,
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&bin_attr_kmac_query_raw,
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&bin_attr_pckmo_query_raw,
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&bin_attr_kmf_query_raw,
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&bin_attr_kmctr_query_raw,
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&bin_attr_kmo_query_raw,
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&bin_attr_pcc_query_raw,
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&bin_attr_prno_query_raw,
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&bin_attr_kma_query_raw,
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&bin_attr_kdsa_query_raw,
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&bin_attr_km_query_auth_info_raw,
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&bin_attr_kmc_query_auth_info_raw,
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&bin_attr_kimd_query_auth_info_raw,
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&bin_attr_klmd_query_auth_info_raw,
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&bin_attr_kmac_query_auth_info_raw,
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&bin_attr_pckmo_query_auth_info_raw,
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&bin_attr_kmf_query_auth_info_raw,
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&bin_attr_kmctr_query_auth_info_raw,
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&bin_attr_kmo_query_auth_info_raw,
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&bin_attr_pcc_query_auth_info_raw,
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&bin_attr_prno_query_auth_info_raw,
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&bin_attr_kma_query_auth_info_raw,
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&bin_attr_kdsa_query_auth_info_raw,
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NULL,
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};
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static const struct attribute_group cpacf_attr_grp = {
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.name = "cpacf",
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.bin_attrs = cpacf_attrs,
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};
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static int __init cpacf_init(void)
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{
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struct device *cpu_root;
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int rc = 0;
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cpu_root = bus_get_dev_root(&cpu_subsys);
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if (cpu_root) {
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rc = sysfs_create_group(&cpu_root->kobj, &cpacf_attr_grp);
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put_device(cpu_root);
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}
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return rc;
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}
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device_initcall(cpacf_init);
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