^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2019 IBM Corporation <nayna@linux.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This code exposes secure variables to user via sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define pr_fmt(fmt) "secvar-sysfs: "fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/secvar.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define NAME_MAX_SIZE 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static struct kobject *secvar_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static struct kset *secvar_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static ssize_t format_show(struct kobject *kobj, struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) ssize_t rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct device_node *node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) const char *format;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) node = of_find_compatible_node(NULL, NULL, "ibm,secvar-backend");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (!of_device_is_available(node))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) rc = of_property_read_string(node, "format", &format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) rc = sprintf(buf, "%s\n", format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) of_node_put(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static ssize_t size_show(struct kobject *kobj, struct kobj_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) uint64_t dsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) pr_err("Error retrieving %s variable size %d\n", kobj->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return sprintf(buf, "%llu\n", dsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static ssize_t data_read(struct file *filep, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct bin_attribute *attr, char *buf, loff_t off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) uint64_t dsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) pr_err("Error getting %s variable size %d\n", kobj->name, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) pr_debug("dsize is %llu\n", dsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) data = kzalloc(dsize, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, data, &dsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) pr_err("Error getting %s variable %d\n", kobj->name, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) goto data_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) rc = memory_read_from_buffer(buf, count, &off, data, dsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) data_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) kfree(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static ssize_t update_write(struct file *filep, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct bin_attribute *attr, char *buf, loff_t off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) pr_debug("count is %ld\n", count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) rc = secvar_ops->set(kobj->name, strlen(kobj->name) + 1, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) pr_err("Error setting the %s variable %d\n", kobj->name, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static struct kobj_attribute format_attr = __ATTR_RO(format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static struct kobj_attribute size_attr = __ATTR_RO(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static struct bin_attribute data_attr = __BIN_ATTR_RO(data, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static struct bin_attribute update_attr = __BIN_ATTR_WO(update, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static struct bin_attribute *secvar_bin_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) &data_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) &update_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static struct attribute *secvar_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) &size_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static const struct attribute_group secvar_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .attrs = secvar_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .bin_attrs = secvar_bin_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) __ATTRIBUTE_GROUPS(secvar_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static struct kobj_type secvar_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .default_groups = secvar_attr_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static int update_kobj_size(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct device_node *node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) u64 varsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) node = of_find_compatible_node(NULL, NULL, "ibm,secvar-backend");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (!of_device_is_available(node)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) rc = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) rc = of_property_read_u64(node, "max-var-size", &varsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) data_attr.size = varsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) update_attr.size = varsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) of_node_put(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int secvar_sysfs_load(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) uint64_t namesize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct kobject *kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) name = kzalloc(NAME_MAX_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) rc = secvar_ops->get_next(name, &namesize, NAME_MAX_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (rc != -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) pr_err("error getting secvar from firmware %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (!kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) kobject_init(kobj, &secvar_ktype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) rc = kobject_add(kobj, &secvar_kset->kobj, "%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) pr_warn("kobject_add error %d for attribute: %s\n", rc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) kobject_put(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) kobj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) kobject_uevent(kobj, KOBJ_ADD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) } while (!rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) kfree(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static int secvar_sysfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (!secvar_ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) pr_warn("secvar: failed to retrieve secvar operations.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) secvar_kobj = kobject_create_and_add("secvar", firmware_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!secvar_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) pr_err("secvar: Failed to create firmware kobj\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) rc = sysfs_create_file(secvar_kobj, &format_attr.attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) kobject_put(secvar_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) secvar_kset = kset_create_and_add("vars", NULL, secvar_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (!secvar_kset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) pr_err("secvar: sysfs kobject registration failed.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) kobject_put(secvar_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) rc = update_kobj_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) pr_err("Cannot read the size of the attribute\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) secvar_sysfs_load();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) late_initcall(secvar_sysfs_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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