The purpose for this patch is submit HP BIOSCFG driver to be list of
HP Linux kernel drivers. The driver include a total of 12 files
broken in several patches. This is set 3 of 4.
Signed-off-by: Jorge Lopez <jorge.lopez2@xxxxxx>
---
Based on the latest platform-drivers-x86.git/for-next
---
.../x86/hp/hp-bioscfg/passwdobj-attributes.c | 647 ++++++++++++++++++
.../x86/hp/hp-bioscfg/spmobj-attributes.c | 408 +++++++++++
.../x86/hp/hp-bioscfg/string-attributes.c | 457 +++++++++++++
3 files changed, 1512 insertions(+)
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/spmobj-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/string-attributes.c
diff --git a/drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c
new file mode 100644
index 000000000000..e69688e7d55e
--- /dev/null
+++ b/drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c
@@ -0,0 +1,647 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Functions corresponding to password object type attributes under
+ * BIOS PASSWORD for use with hp-bioscfg driver.
+ *
+ * Copyright (c) 2022 HP Development Company, L.P.
+ */
+
+#include "bioscfg.h"
+#include <asm-generic/posix_types.h>
+
+get_instance_id(password);
+
+int clear_passwords(const int instance)
+{
+ if (!bioscfg_drv.password_data[instance].is_enabled)
+ return 0;
+
+ memset(bioscfg_drv.password_data[instance].current_password,
+ 0, sizeof(bioscfg_drv.password_data[instance].current_password));
+ memset(bioscfg_drv.password_data[instance].new_password,
+ 0, sizeof(bioscfg_drv.password_data[instance].new_password));
+
+ return 0;
+}
+
+int clear_all_passwords(void)
+{
+ int instance;
+
+ for (instance = 0; instance < bioscfg_drv.password_instances_count; instance++)
+ clear_passwords(instance);
+
+ return 0;
+}
+
+int get_password_instance_for_type(const char *name)
+{
+ int count = bioscfg_drv.password_instances_count;
+ int instance;
+
+ for (instance = 0; instance < count; instance++) {
+ if (strcmp(bioscfg_drv.password_data[instance].display_name, name) == 0)
+ return instance;
+ }
+ return -EINVAL;
+}
+
+int validate_password_input(int instance_id, const char *buf)
+{
+ int length;
+
+ length = strlen(buf);
+ if (buf[length-1] == '\n')
+ length--;
+
+ if (length > MAX_PASSWD_SIZE)
+ return INVALID_BIOS_AUTH;
+
+ if (bioscfg_drv.password_data[instance_id].min_password_length > length ||
+ bioscfg_drv.password_data[instance_id].max_password_length < length)
+ return INVALID_BIOS_AUTH;
+ return SUCCESS;
+}
+
+int password_is_set(const char *name)
+{
+ int id;
+
+ id = get_password_instance_for_type(name);
+ if (id < 0)
+ return 0;
+
+ return bioscfg_drv.password_data[id].is_enabled;
+}
+
+attribute_n_property_show(is_enabled, password);
+static struct kobj_attribute password_is_password_set = __ATTR_RO(is_enabled);
+
+static ssize_t current_password_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ char *p, *buf_cp;
+ int id, ret = 0;
+
+ buf_cp = kstrdup(buf, GFP_KERNEL);
+ if (!buf_cp) {
+ ret = -ENOMEM;
+ goto exit_current_password;
+ }
+
+ p = memchr(buf_cp, '\n', count);
+
+ if (p != NULL)
+ *p = '\0';
+
+ id = get_password_instance_id(kobj);
+
+ if (id >= 0)
+ ret = validate_password_input(id, buf_cp);
+
+ if (!ret) {
+ strscpy(bioscfg_drv.password_data[id].current_password,
+ buf_cp,
+ sizeof(bioscfg_drv.password_data[id].current_password));
+ /*
+ * set pending reboot flag depending on
+ * "RequiresPhysicalPresence" value
+ */
+ if (bioscfg_drv.password_data[id].requires_physical_presence)
+ bioscfg_drv.pending_reboot = TRUE;
+ }
+
+exit_current_password:
+ kfree(buf_cp);
+ return ret ? ret : count;
+}
+static struct kobj_attribute password_current_password = __ATTR_WO(current_password);
+
+static ssize_t new_password_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ char *p, *buf_cp = NULL;
+ int id, ret = -EIO;
+
+ buf_cp = kstrdup(buf, GFP_KERNEL);
+ if (!buf_cp) {
+ ret = -ENOMEM;
+ goto exit_new_password;
+ }
+
+ p = memchr(buf_cp, '\n', count);
+
+ if (p != NULL)
+ *p = '\0';
+
+ id = get_password_instance_id(kobj);
+
+ if (id >= 0)
+ ret = validate_password_input(id, buf_cp);
+
+ if (!ret)
+ strscpy(bioscfg_drv.password_data[id].new_password,
+ buf_cp,
+ sizeof(bioscfg_drv.password_data[id].new_password));
+
+ if (!ret)
+ ret = hp_set_attribute(kobj->name, buf_cp);
+
+exit_new_password:
+ /*
+ * Regardless of the results both new and current passwords
+ * will be set to zero and avoid security issues
+ */
+ clear_passwords(id);
+
+ kfree(buf_cp);
+ return ret ? ret : count;
+}
+
+static struct kobj_attribute password_new_password = __ATTR_WO(new_password);
+
+
+attribute_n_property_show(min_password_length, password);
+static struct kobj_attribute password_min_password_length = __ATTR_RO(min_password_length);
+
+attribute_n_property_show(max_password_length, password);
+static struct kobj_attribute password_max_password_length = __ATTR_RO(max_password_length);
+
+static ssize_t role_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ if (strcmp(kobj->name, SETUP_PASSWD) == 0)
+ return sprintf(buf, "%s\n", role_type[BIOS_ADMIN]);
+
+ if (strcmp(kobj->name, POWER_ON_PASSWD) == 0)
+ return sprintf(buf, "%s\n", role_type[POWER_ON]);
+
+ return -EIO;
+}
+static struct kobj_attribute password_role = __ATTR_RO(role);
+
+static ssize_t mechanism_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ int i = get_password_instance_id(kobj);
+
+ if (i < 0)
+ return i;
+
+ if (bioscfg_drv.password_data[i].mechanism != PASSWORD)
+ return -EINVAL;
+
+ return sprintf(buf, "%s\n",
+ passwd_mechanism_types[bioscfg_drv.password_data[i].mechanism]);
+}
+static struct kobj_attribute password_mechanism = __ATTR_RO(mechanism);
+
+static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "password\n");
+}
+static struct kobj_attribute password_type = __ATTR_RO(type);
+
+attribute_s_property_show(display_name, password);
+static struct kobj_attribute password_display_name =
+ __ATTR_RO(display_name);
+
+attribute_s_property_show(display_name_language_code, password);
+static struct kobj_attribute password_display_langcode =
+ __ATTR_RO(display_name_language_code);
+
+attribute_s_property_show(supported_encoding, password);
+static struct kobj_attribute password_encoding =
+ __ATTR_RO(supported_encoding);
+
+attribute_n_property_show(encoding_size, password);
+static struct kobj_attribute password_encoding_size =
+ __ATTR_RO(encoding_size);
+
+static struct attribute *password_attrs[] = {
+ &password_is_password_set.attr,
+ &password_min_password_length.attr,
+ &password_max_password_length.attr,
+ &password_current_password.attr,
+ &password_new_password.attr,
+ &password_role.attr,
+ &password_mechanism.attr,
+ &password_type.attr,
+ &password_display_name.attr,
+ &password_display_langcode.attr,
+ &password_encoding.attr,
+ &password_encoding_size.attr,
+ NULL,
+};
+
+static const struct attribute_group bios_password_attr_group = {
+ .attrs = password_attrs,
+};
+
+static const struct attribute_group system_password_attr_group = {
+ .attrs = password_attrs,
+};
+
+int alloc_password_data(void)
+{
+ int ret = 0;
+
+ bioscfg_drv.password_instances_count = get_instance_count(HP_WMI_BIOS_PASSWORD_GUID);
+ bioscfg_drv.password_data = kcalloc(bioscfg_drv.password_instances_count,
+ sizeof(struct password_data), GFP_KERNEL);
+ if (!bioscfg_drv.password_data) {
+ bioscfg_drv.password_instances_count = 0;
+ ret = -ENOMEM;
+ }
+
+ return ret;
+}
+
+/*
+ * populate_password_package_data -
+ * Populate all properties for an instance under password attribute
+ *
+ * @password_obj: ACPI object with password data
+ * @instance_id: The instance to enumerate
+ * @attr_name_kobj: The parent kernel object
+ */
+int populate_password_package_data(union acpi_object *password_obj, int instance_id,
+ struct kobject *attr_name_kobj)
+{
+ char *str_value = NULL;
+ int str_len;
+ int ret = 0;
+
+ bioscfg_drv.password_data[instance_id].type = HPWMI_PASSWORD_TYPE;
+ bioscfg_drv.password_data[instance_id].attr_name_kobj = attr_name_kobj;
+
+ ret = convert_hexstr_to_str(&(password_obj[NAME].string.pointer),
+ password_obj[NAME].string.length,
+ &str_value, &str_len);
+
+ if (ACPI_FAILURE(ret)) {
+ kfree(str_value);
+ return ret;
+ }
+
+ strscpy(bioscfg_drv.password_data[instance_id].attribute_name,
+ str_value,
+ sizeof(bioscfg_drv.password_data[instance_id].attribute_name));
+ strscpy(bioscfg_drv.password_data[instance_id].display_name,
+ str_value,
+ sizeof(bioscfg_drv.password_data[instance_id].display_name));
+
+ kfree(str_value);
+ str_value = NULL;
+
+ populate_password_elements_from_package(password_obj, instance_id, HPWMI_PASSWORD_TYPE);
+
+ if (strcmp(attr_name_kobj->name, "Setup Password") == 0) {
+ /* Save system authentication instance for easy access */
+ return sysfs_create_group(attr_name_kobj, &bios_password_attr_group);
+ }
+
+ return sysfs_create_group(attr_name_kobj, &system_password_attr_group);
+}
+
+int populate_password_elements_from_package(union acpi_object *password_obj,
+ int instance_id,
+ enum hp_wmi_data_type type)
+{
+ char *str_value = NULL;
+ int value_len;
+ int status = 0;
+ u32 size = 0;
+ u32 int_value;
+ int elem = 0;
+ int reqs;
+ int eloc;
+ int pos_values;
+
+ strscpy(bioscfg_drv.password_data[instance_id].display_name_language_code,
+ LANG_CODE_STR,
+ sizeof(bioscfg_drv.password_data[instance_id].display_name_language_code));
+
+ for (elem = 1, eloc = 1; elem < hp_wmi_elements_count[type]; elem++, eloc++) {
+
+ switch (password_obj[elem].type) {
+ case ACPI_TYPE_STRING:
+
+ if (PREREQUISITES != elem && ENUM_POSSIBLE_VALUES != elem) {
+ status = convert_hexstr_to_str(&password_obj[elem].string.pointer,
+ password_obj[elem].string.length,
+ &str_value, &value_len);
+
+ if (ACPI_FAILURE(status))
+ continue;
+
+ }
+ break;
+ case ACPI_TYPE_INTEGER:
+ int_value = (u32)password_obj[elem].integer.value;
+ break;
+ default:
+ pr_warn("Unsupported object type [%d]\n", password_obj[elem].type);
+ continue;
+ }
+
+ /* stop if extra counter is greater than total number
+ * of elements for password type
+ */
+ if (eloc == hp_wmi_elements_count[type])
+ goto exit_password_package;
+
+ /* Assign appropriate element value to corresponding field*/
+ switch (eloc) {
+ case VALUE:
+ break;
+ case PATH:
+ strscpy(bioscfg_drv.password_data[instance_id].path, str_value,
+ sizeof(bioscfg_drv.password_data[instance_id].path));
+ break;
+ case IS_READONLY:
+ bioscfg_drv.password_data[instance_id].is_readonly = int_value;
+ break;
+ case DISPLAY_IN_UI:
+ bioscfg_drv.password_data[instance_id].display_in_ui = int_value;
+ break;
+ case REQUIRES_PHYSICAL_PRESENCE:
+ bioscfg_drv.password_data[instance_id].requires_physical_presence = int_value;
+ break;
+ case SEQUENCE:
+ bioscfg_drv.password_data[instance_id].sequence = int_value;
+ break;
+ case PREREQUISITE_SIZE:
+ bioscfg_drv.password_data[instance_id].prerequisitesize = int_value;
+ if (int_value > 20)
+ pr_warn("Prerequisites size value exceeded the maximum number of elements supported or data may be malformed\n");
+ /*
+ * prerequisites element is omitted when
+ * prerequisitesSize value is zero.
+ */
+ if (int_value == 0)
+ eloc++;
+ break;
+ case PREREQUISITES:
+ size = bioscfg_drv.password_data[instance_id].prerequisitesize;
+
+ for (reqs = 0; reqs < size; reqs++) {
+ status = convert_hexstr_to_str(&password_obj[elem].string.pointer,
+ password_obj[elem].string.length,
+ &str_value, &value_len);
+
+ if (ACPI_FAILURE(status))
+ break;
+
+ strlcat(bioscfg_drv.password_data[instance_id].prerequisites,
+ str_value,
+ sizeof(bioscfg_drv.password_data[instance_id].prerequisites));
+
+ if (reqs != (size - 1))
+ strlcat(bioscfg_drv.password_data[instance_id].prerequisites, ";",
+ sizeof(bioscfg_drv.password_data[instance_id].prerequisites));
+
+ kfree(str_value);
+ str_value = NULL;
+ }
+ break;
+
+ case SECURITY_LEVEL:
+ bioscfg_drv.password_data[instance_id].security_level = int_value;
+ break;
+
+ case PSWD_MIN_LENGTH:
+ bioscfg_drv.password_data[instance_id].min_password_length = int_value;
+ break;
+ case PSWD_MAX_LENGTH:
+ bioscfg_drv.password_data[instance_id].max_password_length = int_value;
+ break;
+ case PSWD_SIZE:
+ bioscfg_drv.password_data[instance_id].encoding_size = int_value;
+ break;
+ case PSWD_SUPPORTED_ENCODING:
+ size = bioscfg_drv.password_data[instance_id].encoding_size;
+ for (pos_values = 0; pos_values < size; pos_values++) {
+ status = convert_hexstr_to_str(&password_obj[elem + pos_values].string.pointer,
+ password_obj[elem + pos_values].string.length,
+ &str_value, &value_len);
+ if (ACPI_FAILURE(status))
+ break;
+
+ strlcat(bioscfg_drv.password_data[instance_id].supported_encoding,
+ str_value,
+ sizeof(bioscfg_drv.password_data[instance_id].supported_encoding));
+
+ if (pos_values < (size - 1))
+ strlcat(bioscfg_drv.password_data[instance_id].supported_encoding, ";",
+ sizeof(bioscfg_drv.password_data[instance_id].supported_encoding));
+ kfree(str_value);
+ str_value = NULL;
+ }
+ break;
+ case PSWD_IS_SET:
+ bioscfg_drv.password_data[instance_id].is_enabled = int_value;
+ break;
+
+ default:
+ pr_warn("Invalid element: %d found in Password attribute or data may be malformed\n", elem);
+ break;
+ }
+ kfree(str_value);
+ str_value = NULL;
+ }
+
+exit_password_package:
+ kfree(str_value);
+ str_value = NULL;
+ return 0;
+}
+
+/*
+ * populate_password_buffer_data -
+ * Populate all properties for an instance under password object attribute
+ *
+ * @password_obj: ACPI object with password object data
+ * @instance_id: The instance to enumerate
+ * @attr_name_kobj: The parent kernel object
+ */
+int populate_password_buffer_data(union acpi_object *password_obj, int instance_id,
+ struct kobject *attr_name_kobj)
+{
+ bioscfg_drv.password_data[instance_id].type = HPWMI_PASSWORD_TYPE;
+ bioscfg_drv.password_data[instance_id].attr_name_kobj = attr_name_kobj;
+
+ strscpy(bioscfg_drv.password_data[instance_id].attribute_name,
+ attr_name_kobj->name,
+ sizeof(bioscfg_drv.password_data[instance_id].attribute_name));
+ strscpy(bioscfg_drv.password_data[instance_id].display_name,
+ attr_name_kobj->name,
+ sizeof(bioscfg_drv.password_data[instance_id].display_name));
+
+ /* Populate Password attributes */
+ populate_password_elements_from_buffer(password_obj, instance_id, HPWMI_PASSWORD_TYPE);
+ if (strcmp(attr_name_kobj->name, "Setup Password") == 0)
+ return sysfs_create_group(attr_name_kobj, &bios_password_attr_group);
+
+ return sysfs_create_group(attr_name_kobj, &system_password_attr_group);
+}
+
+int populate_password_elements_from_buffer(union acpi_object *password_obj,
+ int instance_id,
+ enum hp_wmi_data_type type)
+{
+ int status;
+ char *str = NULL;
+ int elem;
+ int reqs;
+ int integer;
+ int size = 0;
+ int values;
+
+ elem = 0;
+ strscpy(bioscfg_drv.password_data[instance_id].display_name_language_code,
+ LANG_CODE_STR,
+ sizeof(bioscfg_drv.password_data[instance_id].display_name_language_code));
+
+ for (elem = 1; elem < 3; elem++) {
+
+ status = get_string_from_buffer((u16 **)&password_obj->buffer.pointer, &str);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ switch (elem) {
+ case VALUE:
+ strscpy(bioscfg_drv.password_data[instance_id].current_password,
+ str, sizeof(bioscfg_drv.password_data[instance_id].current_password));
+ break;
+ case PATH:
+ strscpy(bioscfg_drv.password_data[instance_id].path, str,
+ sizeof(bioscfg_drv.password_data[instance_id].path));
+ break;
+ default:
+ pr_warn("Invalid element: %d found in Password attribute or data may be malformed\n", elem);
+ break;
+ }
+ kfree(str);
+ str = NULL;
+ }
+
+ for (elem = 3; elem < hp_wmi_elements_count[type]; elem++) {
+
+ if (elem != PREREQUISITES && elem != PSWD_SUPPORTED_ENCODING)
+ status = get_integer_from_buffer((int **)&password_obj->buffer.pointer, (int *)&integer);
+
+ if (ACPI_FAILURE(status))
+ continue;
+
+ switch (elem) {
+ case IS_READONLY:
+ bioscfg_drv.password_data[instance_id].is_readonly = integer;
+ break;
+ case DISPLAY_IN_UI:
+ bioscfg_drv.password_data[instance_id].display_in_ui = integer;
+ break;
+ case REQUIRES_PHYSICAL_PRESENCE:
+ bioscfg_drv.password_data[instance_id].requires_physical_presence = integer;
+ break;
+ case SEQUENCE:
+ bioscfg_drv.password_data[instance_id].sequence = integer;
+ break;
+ case PREREQUISITE_SIZE:
+ bioscfg_drv.password_data[instance_id].prerequisitesize = integer;
+ if (integer > 20)
+ pr_warn("Prerequisites size value exceeded the maximum number of elements supported or data may be malformed\n");
+ break;
+ case PREREQUISITES:
+ size = bioscfg_drv.password_data[instance_id].prerequisitesize;
+ for (reqs = 0; reqs < size; reqs++) {
+ status = get_string_from_buffer((u16 **)&password_obj->buffer.pointer, &str);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ strlcat(bioscfg_drv.password_data[instance_id].prerequisites,
+ str,
+ sizeof(bioscfg_drv.password_data[instance_id].prerequisites));
+
+ if (reqs != (size - 1))
+ strlcat(bioscfg_drv.password_data[instance_id].prerequisites, ";",
+ sizeof(bioscfg_drv.password_data[instance_id].prerequisites));
+
+ kfree(str);
+ str = NULL;
+ }
+ break;
+ case SECURITY_LEVEL:
+ bioscfg_drv.password_data[instance_id].security_level = integer;
+ break;
+
+ case PSWD_MIN_LENGTH:
+ bioscfg_drv.password_data[instance_id].min_password_length = integer;
+ break;
+ case PSWD_MAX_LENGTH:
+ bioscfg_drv.password_data[instance_id].max_password_length = integer;
+ break;
+ case PSWD_SIZE:
+ bioscfg_drv.password_data[instance_id].encoding_size = integer;
+ break;
+ case PSWD_SUPPORTED_ENCODING:
+ size = bioscfg_drv.password_data[instance_id].encoding_size;
+ for (values = 0; values < size; values++) {
+ status = get_string_from_buffer((u16 **)&password_obj->buffer.pointer, &str);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ strlcat(bioscfg_drv.password_data[instance_id].supported_encoding,
+ str,
+ sizeof(bioscfg_drv.password_data[instance_id].supported_encoding));
+
+ if (values != (size - 1))
+ strlcat(bioscfg_drv.password_data[instance_id].supported_encoding, ";",
+ sizeof(bioscfg_drv.password_data[instance_id].supported_encoding));
+
+ kfree(str);
+ str = NULL;
+ }
+ break;
+ case PSWD_IS_SET:
+ bioscfg_drv.password_data[instance_id].is_enabled = integer;
+ break;
+ default:
+ pr_warn("Invalid element: %d found in Password attribute or data may be malformed\n", elem);
+ break;
+ }
+ kfree(str);
+ str = NULL;
+ }
+ kfree(str);
+ str = NULL;
+
+ return 0;
+}
+
+/*
+ * exit_password_attributes() - Clear all attribute data
+ *
+ * Clears all data allocated for this group of attributes
+ */
+void exit_password_attributes(void)
+{
+ int instance_id;
+
+ for (instance_id = 0; instance_id < bioscfg_drv.password_instances_count; instance_id++) {
+ if (bioscfg_drv.password_data[instance_id].attr_name_kobj) {
+ if (strcmp(bioscfg_drv.password_data[instance_id].attr_name_kobj->name, SETUP_PASSWD) == 0)
+ sysfs_remove_group(bioscfg_drv.password_data[instance_id].attr_name_kobj,
+ &bios_password_attr_group);
+ else
+ sysfs_remove_group(bioscfg_drv.password_data[instance_id].attr_name_kobj,
+ &system_password_attr_group);
+ }
+ }
+ bioscfg_drv.password_instances_count = 0;
+ kfree(bioscfg_drv.password_data);
+ bioscfg_drv.password_data = NULL;
+}
diff --git a/drivers/platform/x86/hp/hp-bioscfg/spmobj-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/spmobj-attributes.c
new file mode 100644
index 000000000000..631fdbd05be9
--- /dev/null
+++ b/drivers/platform/x86/hp/hp-bioscfg/spmobj-attributes.c
@@ -0,0 +1,408 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Functions corresponding to secure platform management object type
+ * attributes under BIOS PASSWORD for use with hp-bioscfg driver
+ *
+ * Copyright (c) 2022 HP Development Company, L.P.
+ */
+
+#include "bioscfg.h"
+
+#define MAX_KEK_BLOB_SIZE 4160
+#define MAX_SK_BLOB_SIZE 516
+
+enum spm_states_values {
+ NOT_PROVISIONED = 0x00,
+ PROVISIONED = 0x01,
+ PROVISIONING_IN_PROGRESS = 0x02
+};
+
+static const char * const spm_state_types[] = {
+ "not provisioned",
+ "provisioned",
+ "provisioning in progress"};
+
+
+int check_spm_is_enabled(void)
+{
+ /* do we need to check the admin password is also configured */
+ return bioscfg_drv.spm_data.is_enabled;
+}
+
+/*
+ * calculate_security_buffer() - determines size of security buffer
+ * for authentication scheme
+ *
+ * @authentication: the authentication content
+ *
+ * Currently only supported type is Admin password
+ */
+size_t calculate_security_buffer(const char *authentication)
+{
+ int size;
+
+ if (authentication != NULL && strlen(authentication) > 0) {
+ size = (sizeof(u16) + (strlen(authentication) * sizeof(u16)) +
+ + (strlen(UTF_PREFIX) * sizeof(u16)));
+ return size;
+ }
+
+ size = sizeof(u16) * 2;
+ return size;
+}
+
+/*
+ * populate_security_buffer() - builds a security buffer for
+ * authentication scheme
+ *
+ * @buffer: the buffer to populate
+ * @authentication: the authentication content
+ *
+ * Currently only supported type is PLAIN TEXT
+ */
+void populate_security_buffer(u16 *buffer, const char *authentication)
+{
+ u16 *auth = buffer;
+ char *strprefix = NULL;
+
+ if (strncmp(authentication, BEAM_PREFIX, strlen(BEAM_PREFIX)) == 0) {
+ /*
+ * BEAM_PREFIX is append to buffer when a signature
+ * is provided and Sure Admin is enabled in BIOS
+ */
+ // BEAM_PREFIX found, convert part to unicode
+ auth = ascii_to_utf16_unicode(auth, authentication);
+ } else {
+ /*
+ * UTF-16 prefix is append to the * buffer when a BIOS
+ * admin password is configured in BIOS
+ */
+
+ // append UTF_PREFIX to part and then convert it to unicode
+ strprefix = kasprintf(GFP_KERNEL, "%s%s", UTF_PREFIX, authentication);
+ if (!strprefix)
+ goto out_populate_security_buffer;
+
+ auth = ascii_to_utf16_unicode(auth, strprefix);
+ }
+out_populate_security_buffer:
+
+ kfree(strprefix);
+ strprefix = NULL;
+}
+
+ssize_t update_spm_state(void)
+{
+ int ret;
+ struct secureplatform_provisioning_data *data = NULL;
+
+ data = kmalloc(sizeof(struct secureplatform_provisioning_data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto spm_state_exit;
+ }
+
+ ret = hp_wmi_perform_query(HPWMI_SECUREPLATFORM_GET_STATE,
+ HPWMI_SECUREPLATFORM, data, 0,
+ sizeof(struct secureplatform_provisioning_data));
+ if (ret < 0)
+ goto spm_state_exit;
+
+ bioscfg_drv.spm_data.mechanism = data->state;
+ if (bioscfg_drv.spm_data.mechanism)
+ bioscfg_drv.spm_data.is_enabled = 1;
+
+spm_state_exit:
+ kfree(data);
+
+ return ret;
+}
+
+/*
+ * statusbin - Reports SPM status in binary format
+ *
+ * @kobj: Pointer to a kernel object of things that show up as
+ * directory in the sysfs filesystem.
+ * @attr: Pointer to list of attributes for the operation
+ * @buf: Pointer to buffer
+ *
+ * Returns number of bytes read on success. Otherwise,
+ * an HP WMI query specific error code (which is positive)
+ * -ENODEV if the query was not successful at all
+ *
+ */
+ssize_t statusbin(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ int ret = hp_wmi_perform_query(HPWMI_SECUREPLATFORM_GET_STATE,
+ HPWMI_SECUREPLATFORM, buf, 0,
+ sizeof(struct secureplatform_provisioning_data));
+
+ return ret ? -ENODEV : sizeof(struct secureplatform_provisioning_data);
+}
+
+ssize_t statusbin_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ int ret;
+ struct secureplatform_provisioning_data *data = NULL;
+
+ data = kmalloc(sizeof(struct secureplatform_provisioning_data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto statusbin_show_exit;
+ }
+
+ ret = statusbin(kobj, attr, (char *)data);
+ if (ret < 0)
+ goto statusbin_show_exit;
+
+ /* copy data to spm local structure */
+ memcpy(buf, data, sizeof(struct secureplatform_provisioning_data));
+
+statusbin_show_exit:
+ kfree(data);
+
+ return ret ? ret : strnlen(buf, PAGE_SIZE);
+}
+struct kobj_attribute password_spm_statusbin = __ATTR_RO(statusbin);
+
+/*
+ * status_show - Reads SPM status
+ *
+ * @kobj: Pointer to a kernel object of things that show up as
+ * directory in the sysfs filesystem.
+ * @attr: Pointer to list of attributes for the operation
+ * @buf: Pointer to buffer
+ *
+ * Returns number of bytes read on success. Otherwise,
+ * an HP WMI query specific error code (which is positive)
+ * -ENODEV if the query was not successful at all
+ * -ENOMEM if cannot allocate required memory size
+ *
+ */
+ssize_t status_show(struct kobject *kobj, struct kobj_attribute
+ *attr, char *buf)
+{
+ int ret, i;
+ struct secureplatform_provisioning_data *data = NULL;
+
+ data = kmalloc(sizeof(struct secureplatform_provisioning_data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto status_show_exit;
+ }
+
+ ret = statusbin(kobj, attr, (char *)data);
+ if (ret < 0)
+ goto status_show_exit;
+
+ snprintf(buf, PAGE_SIZE, "%sState: %d\n", buf, data->state);
+ snprintf(buf, PAGE_SIZE, "%sVersion: %d.%d\n", buf, data->version[0],
+ data->version[1]);
+
+ /* state == 0 means secure platform management feature is not configured in BIOS. */
+ if (data->state == 0)
+ goto status_show_exit;
+
+ snprintf(buf, PAGE_SIZE, "%sNonce: %d\n", buf, data->nonce);
+ snprintf(buf, PAGE_SIZE, "%sFeaturesInUse: %d\n", buf, data->features);
+ snprintf(buf, PAGE_SIZE, "%sEndorsementKeyMod: {", buf);
+
+ for (i = 255; i >= 0; i--)
+ snprintf(buf, PAGE_SIZE, "%s %u", buf, data->kek_mod[i]);
+
+ snprintf(buf, PAGE_SIZE, "%s }\n", buf);
+ snprintf(buf, PAGE_SIZE, "%sSigningKeyMod: {", buf);
+
+ for (i = 255; i >= 0; i--)
+ snprintf(buf, PAGE_SIZE, "%s %u", buf, data->sk_mod[i]);
+ snprintf(buf, PAGE_SIZE, "%s }\n", buf);
+
+status_show_exit:
+ kfree(data);
+
+ return strnlen(buf, PAGE_SIZE);
+}
+
+struct kobj_attribute password_spm_status = __ATTR_RO(status);
+
+attribute_spm_n_property_show(is_enabled, spm);
+static struct kobj_attribute password_spm_is_key_enabled = __ATTR_RO(is_enabled);
+
+
+static ssize_t key_mechanism_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ int ret;
+
+ ret = snprintf(buf, PAGE_SIZE, "%s\n",
+ spm_mechanism_types[bioscfg_drv.spm_data.mechanism]);
+ return ret;
+}
+static struct kobj_attribute password_spm_key_mechanism = __ATTR_RO(key_mechanism);
+
+static ssize_t sk_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ int length;
+
+ length = count;
+ if (buf[length-1] == '\n')
+ length--;
+
+ /* allocate space and copy current signing key */
+ bioscfg_drv.spm_data.signing_key = kmalloc(length, GFP_KERNEL);
+ if (!bioscfg_drv.spm_data.signing_key) {
+ ret = -ENOMEM;
+ goto exit_signing_key;
+ }
+
+ memcpy(bioscfg_drv.spm_data.signing_key, buf, length);
+ bioscfg_drv.spm_data.signing_key[length] = '\0';
+
+ /* submit signing key payload */
+ ret = hp_wmi_perform_query(HPWMI_SECUREPLATFORM_SET_SK,
+ HPWMI_SECUREPLATFORM,
+ (void *)bioscfg_drv.spm_data.signing_key,
+ length, 0);
+
+ if (!ret) {
+ bioscfg_drv.spm_data.mechanism = SIGNING_KEY;
+ bioscfg_drv.pending_reboot = TRUE;
+ }
+
+exit_signing_key:
+ kfree(bioscfg_drv.spm_data.signing_key);
+ bioscfg_drv.spm_data.signing_key = NULL;
+
+ return ret ? ret : count;
+}
+
+static struct kobj_attribute password_spm_signing_key = __ATTR_WO(sk);
+
+static ssize_t kek_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ int length;
+
+ length = count;
+ if (buf[length-1] == '\n')
+ length--;
+
+ /* allocate space and copy current signing key */
+ bioscfg_drv.spm_data.endorsement_key = kmalloc(length, GFP_KERNEL);
+ if (!bioscfg_drv.spm_data.endorsement_key) {
+ ret = -ENOMEM;
+ goto exit_endorsement_key;
+ }
+
+ memcpy(bioscfg_drv.spm_data.endorsement_key, buf, length);
+ bioscfg_drv.spm_data.endorsement_key[length] = '\0';
+
+ ret = hp_wmi_perform_query(HPWMI_SECUREPLATFORM_SET_KEK,
+ HPWMI_SECUREPLATFORM,
+ (void *)bioscfg_drv.spm_data.endorsement_key,
+ count, 0);
+
+ if (!ret) {
+ bioscfg_drv.spm_data.mechanism = ENDORSEMENT_KEY;
+ bioscfg_drv.pending_reboot = TRUE;
+ }
+
+exit_endorsement_key:
+ kfree(bioscfg_drv.spm_data.endorsement_key);
+ bioscfg_drv.spm_data.endorsement_key = NULL;
+
+ return ret ? ret : count;
+}
+static struct kobj_attribute password_spm_endorsement_key = __ATTR_WO(kek);
+
+static ssize_t display_name_language_code_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%s\n", LANG_CODE_STR);
+}
+
+static struct kobj_attribute password_spm_display_langcode =
+ __ATTR_RO(display_name_language_code);
+
+
+static ssize_t display_name_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%s\n", SPM_STR_DESC);
+}
+static struct kobj_attribute password_spm_display_name = __ATTR_RO(display_name);
+
+static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "secure-platform-management\n");
+}
+static struct kobj_attribute password_spm_type = __ATTR_RO(type);
+
+static ssize_t role_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%s\n", role_type[BIOS_SPM]);
+}
+static struct kobj_attribute password_spm_role = __ATTR_RO(role);
+
+static struct attribute *secure_platform_attrs[] = {
+ &password_spm_display_name.attr,
+ &password_spm_display_langcode.attr,
+ &password_spm_is_key_enabled.attr,
+ &password_spm_signing_key.attr,
+ &password_spm_endorsement_key.attr,
+ &password_spm_key_mechanism.attr,
+ &password_spm_status.attr,
+ &password_spm_statusbin.attr,
+ &password_spm_type.attr,
+ &password_spm_role.attr,
+ NULL,
+};
+
+static const struct attribute_group secure_platform_attr_group = {
+ .attrs = secure_platform_attrs,
+};
+
+void exit_secure_platform_attributes(void)
+{
+ /* remove secure platform sysfs entry and free key data*/
+
+ kfree(bioscfg_drv.spm_data.endorsement_key);
+ bioscfg_drv.spm_data.endorsement_key = NULL;
+
+ kfree(bioscfg_drv.spm_data.signing_key);
+ bioscfg_drv.spm_data.signing_key = NULL;
+
+ sysfs_remove_group(bioscfg_drv.spm_data.attr_name_kobj, &secure_platform_attr_group);
+}
+
+int populate_secure_platform_data(struct kobject *attr_name_kobj)
+{
+ /* Populate data for Secure Platform Management */
+ bioscfg_drv.spm_data.type = HPWMI_SECURE_PLATFORM_TYPE;
+ bioscfg_drv.spm_data.attr_name_kobj = attr_name_kobj;
+
+ strscpy(bioscfg_drv.spm_data.attribute_name, SPM_STR,
+ sizeof(bioscfg_drv.spm_data.attribute_name));
+ strscpy(bioscfg_drv.spm_data.display_name, SPM_STR_DESC,
+ sizeof(bioscfg_drv.spm_data.display_name));
+
+ bioscfg_drv.spm_data.is_enabled = 0;
+ bioscfg_drv.spm_data.mechanism = 0;
+ bioscfg_drv.pending_reboot = FALSE;
+ update_spm_state();
+
+ bioscfg_drv.spm_data.endorsement_key = NULL;
+ bioscfg_drv.spm_data.signing_key = NULL;
+
+ return sysfs_create_group(attr_name_kobj, &secure_platform_attr_group);
+}
diff --git a/drivers/platform/x86/hp/hp-bioscfg/string-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/string-attributes.c
new file mode 100644
index 000000000000..56ca02b00d1d
--- /dev/null
+++ b/drivers/platform/x86/hp/hp-bioscfg/string-attributes.c
@@ -0,0 +1,457 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Functions corresponding to string type attributes under
+ * HP_WMI_BIOS_STRING_GUID for use with hp-bioscfg driver.
+ *
+ * Copyright (c) 2022 HP Development Company, L.P.
+ */
+
+#include "bioscfg.h"
+
+#define WMI_STRING_TYPE "HPBIOS_BIOSString"
+
+get_instance_id(string);
+
+static ssize_t current_value_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+ int instance_id = get_string_instance_id(kobj);
+ union acpi_object *obj = NULL;
+ ssize_t ret;
+
+ if (instance_id < 0)
+ return -EIO;
+
+ /* need to use specific instance_id and guid combination to get right data */
+ obj = get_wmiobj_pointer(instance_id, HP_WMI_BIOS_STRING_GUID);
+ if (!obj)
+ return -EIO;
+
+ ret = snprintf(buf, PAGE_SIZE, "%s\n",
+ bioscfg_drv.string_data[instance_id].current_value);
+
+ kfree(obj);
+ return ret;
+}
+
+/*
+ * validate_string_input() -
+ * Validate input of current_value against min and max lengths
+ *
+ * @instance_id: The instance on which input is validated
+ * @buf: Input value
+ */
+static int validate_string_input(int instance_id, const char *buf)
+{
+ int in_len = strlen(buf);
+
+ /* BIOS treats it as a read only attribute */
+ if (bioscfg_drv.string_data[instance_id].is_readonly)
+ return -EIO;
+
+ if ((in_len < bioscfg_drv.string_data[instance_id].min_length) ||
+ (in_len > bioscfg_drv.string_data[instance_id].max_length))
+ return -EINVAL;
+
+ strscpy(bioscfg_drv.string_data[instance_id].new_value,
+ buf,
+ sizeof(bioscfg_drv.string_data[instance_id].new_value));
+
+ return 0;
+}
+
+static void update_string_value(int instance_id)
+{
+ /* Write settings to BIOS */
+ strscpy(bioscfg_drv.string_data[instance_id].current_value,
+ bioscfg_drv.string_data[instance_id].new_value,
+ sizeof(bioscfg_drv.string_data[instance_id].current_value));
+}
+
+attribute_s_property_show(display_name_language_code, string);
+static struct kobj_attribute string_display_langcode =
+ __ATTR_RO(display_name_language_code);
+
+attribute_s_property_show(display_name, string);
+static struct kobj_attribute string_display_name =
+ __ATTR_RO(display_name);
+
+attribute_property_store(current_value, string);
+static struct kobj_attribute string_current_val =
+ __ATTR_RW_MODE(current_value, 0600);
+
+attribute_n_property_show(min_length, string);
+static struct kobj_attribute string_min_length =
+ __ATTR_RO(min_length);
+
+attribute_n_property_show(max_length, string);
+static struct kobj_attribute string_max_length =
+ __ATTR_RO(max_length);
+
+static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "string\n");
+}
+
+static struct kobj_attribute string_type =
+ __ATTR_RO(type);
+
+static struct attribute *string_attrs[] = {
+ &string_display_langcode.attr,
+ &string_display_name.attr,
+ &string_current_val.attr,
+ &string_min_length.attr,
+ &string_max_length.attr,
+ &string_type.attr,
+ NULL
+};
+
+static const struct attribute_group string_attr_group = {
+ .attrs = string_attrs,
+};
+
+int alloc_string_data(void)
+{
+ int ret = 0;
+
+ bioscfg_drv.string_instances_count = get_instance_count(HP_WMI_BIOS_STRING_GUID);
+ bioscfg_drv.string_data = kcalloc(bioscfg_drv.string_instances_count,
+ sizeof(struct string_data), GFP_KERNEL);
+ if (!bioscfg_drv.string_data) {
+ bioscfg_drv.string_instances_count = 0;
+ ret = -ENOMEM;
+ }
+ return ret;
+}
+
+/*
+ * populate_string_package_data() -
+ * Populate all properties of an instance under string attribute
+ *
+ * @elements: ACPI object with string data
+ * @instance_id: The instance to enumerate
+ * @attr_name_kobj: The parent kernel object
+ */
+int populate_string_package_data(union acpi_object *elements, int instance_id,
+ struct kobject *attr_name_kobj)
+{
+ char *str_value = NULL;
+ int str_len;
+ int ret = 0;
+
+ bioscfg_drv.string_data[instance_id].type = HPWMI_STRING_TYPE;
+ bioscfg_drv.string_data[instance_id].attr_name_kobj = attr_name_kobj;
+
+ ret = convert_hexstr_to_str(&(elements[NAME].string.pointer),
+ elements[NAME].string.length,
+ &str_value, &str_len);
+
+ if (ACPI_FAILURE(ret)) {
+ pr_warn("Failed to populate string package data. Error [0%0x]\n", ret);
+ kfree(str_value);
+ return ret;
+ }
+
+ strscpy(bioscfg_drv.string_data[instance_id].attribute_name,
+ str_value,
+ sizeof(bioscfg_drv.string_data[instance_id].attribute_name));
+
+ strscpy(bioscfg_drv.string_data[instance_id].display_name,
+ str_value,
+ sizeof(bioscfg_drv.string_data[instance_id].display_name));
+
+ kfree(str_value);
+ str_value = NULL;
+
+ populate_string_elements_from_package(elements, instance_id, HPWMI_STRING_TYPE);
+ update_attribute_permissions(bioscfg_drv.string_data[instance_id].is_readonly,
+ &string_current_val);
+ friendly_user_name_update(bioscfg_drv.string_data[instance_id].path,
+ attr_name_kobj->name,
+ bioscfg_drv.string_data[instance_id].display_name,
+ sizeof(bioscfg_drv.string_data[instance_id].display_name));
+ return sysfs_create_group(attr_name_kobj, &string_attr_group);
+}
+
+int populate_string_elements_from_package(union acpi_object *elements,
+ int instance_id,
+ enum hp_wmi_data_type type)
+{
+ char *str_value = NULL;
+ int value_len;
+ int status = 0;
+ u32 size = 0;
+ u32 int_value;
+ int elem = 0;
+ int reqs;
+ int eloc;
+
+ if (!elements)
+ return -EINVAL;
+
+ strscpy(bioscfg_drv.string_data[instance_id].display_name_language_code,
+ LANG_CODE_STR,
+ sizeof(bioscfg_drv.string_data[instance_id].display_name_language_code));
+
+ for (elem = 1, eloc = 1; elem < hp_wmi_elements_count[type]; elem++, eloc++) {
+
+ switch (elements[elem].type) {
+ case ACPI_TYPE_STRING:
+
+ if (elem != PREREQUISITES) {
+ status = convert_hexstr_to_str(&elements[elem].string.pointer,
+ elements[elem].string.length,
+ &str_value, &value_len);
+
+ if (ACPI_FAILURE(status))
+ continue;
+ }
+ break;
+ case ACPI_TYPE_INTEGER:
+ int_value = (u32)elements[elem].integer.value;
+ break;
+ default:
+ pr_warn("Unsupported object type [%d]\n", elements[elem].type);
+ continue;
+ }
+
+ /*
+ * Stop if extra counter is greater than total number
+ * of elements for string type
+ */
+ if (eloc == hp_wmi_elements_count[type])
+ goto exit_string_package;
+
+ /* Assign appropriate element value to corresponding field*/
+ switch (eloc) {
+ case VALUE:
+ strscpy(bioscfg_drv.string_data[instance_id].current_value,
+ str_value, sizeof(bioscfg_drv.string_data[instance_id].current_value));
+ break;
+ case PATH:
+ strscpy(bioscfg_drv.string_data[instance_id].path, str_value,
+ sizeof(bioscfg_drv.string_data[instance_id].path));
+ break;
+ case IS_READONLY:
+ bioscfg_drv.string_data[instance_id].is_readonly = int_value;
+ break;
+ case DISPLAY_IN_UI:
+ bioscfg_drv.string_data[instance_id].display_in_ui = int_value;
+ break;
+ case REQUIRES_PHYSICAL_PRESENCE:
+ bioscfg_drv.string_data[instance_id].requires_physical_presence = int_value;
+ break;
+ case SEQUENCE:
+ bioscfg_drv.string_data[instance_id].sequence = int_value;
+ break;
+ case PREREQUISITE_SIZE:
+ bioscfg_drv.string_data[instance_id].prerequisitesize = int_value;
+ if (size > 20)
+ pr_warn("Prerequisites size value exceeded the maximum number of elements supported or data may be malformed\n");
+
+ /*
+ * prerequisites element is omitted when
+ * prerequisitesSize value is zero.
+ */
+ if (int_value == 0)
+ eloc++;
+ break;
+ case PREREQUISITES:
+ size = bioscfg_drv.string_data[instance_id].prerequisitesize;
+
+ for (reqs = 0; reqs < size; reqs++) {
+ status = convert_hexstr_to_str(&elements[elem].string.pointer,
+ elements[elem].string.length,
+ &str_value, &value_len);
+
+ if (ACPI_FAILURE(status))
+ continue;
+ pr_warn("Prerequisite String value [%s]\n", str_value);
+
+ strlcat(bioscfg_drv.string_data[instance_id].prerequisites,
+ str_value,
+ sizeof(bioscfg_drv.string_data[instance_id].prerequisites));
+
+ if (reqs != (size - 1))
+ strlcat(bioscfg_drv.string_data[instance_id].prerequisites, ";",
+ sizeof(bioscfg_drv.string_data[instance_id].prerequisites));
+
+ kfree(str_value);
+ str_value = NULL;
+ }
+ break;
+
+ case SECURITY_LEVEL:
+ bioscfg_drv.string_data[instance_id].security_level = int_value;
+ break;
+ case STR_MIN_LENGTH:
+ bioscfg_drv.string_data[instance_id].min_length = int_value;
+ break;
+ case STR_MAX_LENGTH:
+ bioscfg_drv.string_data[instance_id].max_length = int_value;
+ break;
+ default:
+ pr_warn("Invalid element: %d found in String attribute or data may be malformed\n", elem);
+ break;
+ }
+ kfree(str_value);
+ str_value = NULL;
+ }
+exit_string_package:
+ kfree(str_value);
+ str_value = NULL;
+
+ return 0;
+}
+
+/*
+ * populate_string_data() -
+ * Populate all properties of an instance under string attribute
+ *
+ * @string_obj: ACPI object with string data
+ * @instance_id: The instance to enumerate
+ * @attr_name_kobj: The parent kernel object
+ */
+int populate_string_buffer_data(union acpi_object *string_obj, int instance_id, struct kobject *attr_name_kobj)
+{
+ bioscfg_drv.string_data[instance_id].type = HPWMI_STRING_TYPE;
+ bioscfg_drv.string_data[instance_id].attr_name_kobj = attr_name_kobj;
+ strscpy(bioscfg_drv.string_data[instance_id].attribute_name,
+ attr_name_kobj->name,
+ sizeof(bioscfg_drv.string_data[instance_id].attribute_name));
+
+ strscpy(bioscfg_drv.string_data[instance_id].display_name,
+ attr_name_kobj->name,
+ sizeof(bioscfg_drv.string_data[instance_id].display_name));
+ /* Populate string elements */
+
+ populate_string_elements_from_buffer(string_obj, instance_id, HPWMI_STRING_TYPE);
+ update_attribute_permissions(bioscfg_drv.string_data[instance_id].is_readonly,
+ &string_current_val);
+ friendly_user_name_update(bioscfg_drv.string_data[instance_id].path,
+ attr_name_kobj->name,
+ bioscfg_drv.string_data[instance_id].display_name,
+ sizeof(bioscfg_drv.string_data[instance_id].display_name));
+ return sysfs_create_group(attr_name_kobj, &string_attr_group);
+}
+
+int populate_string_elements_from_buffer(union acpi_object *string_obj, int instance_id, enum hp_wmi_data_type type)
+{
+ int status;
+ char *str = NULL;
+ int elem;
+ int reqs;
+ int int_value;
+ int size = 0;
+
+ strscpy(bioscfg_drv.string_data[instance_id].display_name_language_code,
+ LANG_CODE_STR,
+ sizeof(bioscfg_drv.string_data[instance_id].display_name_language_code));
+
+ for (elem = 1; elem < 3; elem++) {
+ status = get_string_from_buffer((u16 **)&string_obj->buffer.pointer, &str);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ switch (elem) {
+ case VALUE:
+ strscpy(bioscfg_drv.string_data[instance_id].current_value,
+ str, sizeof(bioscfg_drv.string_data[instance_id].current_value));
+ break;
+ case PATH:
+ strscpy(bioscfg_drv.string_data[instance_id].path, str, sizeof(bioscfg_drv.string_data[instance_id].path));
+ break;
+ default:
+ pr_warn("Invalid element: %d found in String attribute or data may be malformed\n", elem);
+ break;
+ }
+ kfree(str);
+ str = NULL;
+ }
+
+ for (elem = 3; elem < hp_wmi_elements_count[type]; elem++) {
+
+ if (elem != PREREQUISITES)
+ status = get_integer_from_buffer((int **)&string_obj->buffer.pointer, (int *)&int_value);
+
+ if (ACPI_FAILURE(status))
+ continue;
+
+ switch (elem) {
+ case IS_READONLY:
+ bioscfg_drv.string_data[instance_id].is_readonly = int_value;
+ break;
+ case DISPLAY_IN_UI:
+ bioscfg_drv.string_data[instance_id].display_in_ui = int_value;
+ break;
+ case REQUIRES_PHYSICAL_PRESENCE:
+ bioscfg_drv.string_data[instance_id].requires_physical_presence = int_value;
+ break;
+ case SEQUENCE:
+ bioscfg_drv.string_data[instance_id].sequence = int_value;
+ break;
+ case PREREQUISITE_SIZE:
+ bioscfg_drv.string_data[instance_id].prerequisitesize = int_value;
+ if (int_value > 20)
+ pr_warn("Prerequisites size value exceeded the maximum number of elements supported or data may be malformed\n");
+ break;
+ case PREREQUISITES:
+ size = bioscfg_drv.string_data[instance_id].prerequisitesize;
+ for (reqs = 0; reqs < size; reqs++) {
+ status = get_string_from_buffer((u16 **)&string_obj->buffer.pointer, &str);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ strlcat(bioscfg_drv.string_data[instance_id].prerequisites,
+ str,
+ sizeof(bioscfg_drv.string_data[instance_id].prerequisites));
+
+ if (reqs != (size - 1))
+ strlcat(bioscfg_drv.string_data[instance_id].prerequisites, ";",
+ sizeof(bioscfg_drv.string_data[instance_id].prerequisites));
+
+ kfree(str);
+ str = NULL;
+ }
+ break;
+ case SECURITY_LEVEL:
+ bioscfg_drv.string_data[instance_id].security_level = int_value;
+ break;
+ case STR_MIN_LENGTH:
+ bioscfg_drv.string_data[instance_id].min_length = int_value;
+ break;
+ case STR_MAX_LENGTH:
+ bioscfg_drv.string_data[instance_id].max_length = int_value;
+ break;
+ default:
+ pr_warn("Invalid element: %d found in String attribute or data may be malformed\n", elem);
+ break;
+ }
+ kfree(str);
+ str = NULL;
+ }
+ kfree(str);
+ str = NULL;
+
+ return 0;
+}
+
+/*
+ * exit_string_attributes() - Clear all attribute data
+ *
+ * Clears all data allocated for this group of attributes
+ */
+void exit_string_attributes(void)
+{
+ int instance_id;
+
+ for (instance_id = 0; instance_id < bioscfg_drv.string_instances_count; instance_id++) {
+ if (bioscfg_drv.string_data[instance_id].attr_name_kobj)
+ sysfs_remove_group(bioscfg_drv.string_data[instance_id].attr_name_kobj,
+ &string_attr_group);
+ }
+ bioscfg_drv.string_instances_count = 0;
+
+ kfree(bioscfg_drv.string_data);
+ bioscfg_drv.string_data = NULL;
+}
--
2.34.1
