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 4 of 4.
Signed-off-by: Jorge Lopez <jorge.lopez2@xxxxxx>
---
Based on the latest platform-drivers-x86.git/for-next
---
.../x86/hp/hp-bioscfg/sureadmin-attributes.c | 1014 +++++++++++++++++
.../x86/hp/hp-bioscfg/surestart-attributes.c | 145 +++
2 files changed, 1159 insertions(+)
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/sureadmin-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c
diff --git a/drivers/platform/x86/hp/hp-bioscfg/sureadmin-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/sureadmin-attributes.c
new file mode 100644
index 000000000000..5ad45cdddad9
--- /dev/null
+++ b/drivers/platform/x86/hp/hp-bioscfg/sureadmin-attributes.c
@@ -0,0 +1,1014 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Functions corresponding to sure admin object type attributes under
+ * BIOS for use with hp-bioscfg driver
+ *
+ * Copyright (c) 2022 HP Development Company, L.P.
+ */
+
+#include "bioscfg.h"
+
+static int bios_settings_size;
+static int buf_alloc_size;
+static char *bios_settings_buffer;
+
+const char *hp_wmi_classes[] = {
+ "HPBIOS_BIOSString",
+ "HPBIOS_BIOSInteger",
+ "HPBIOS_BIOSEnumeration",
+ "HPBIOS_BIOSOrderedList",
+ "HPBIOS_BIOSPassword"
+};
+
+get_instance_id_for_attribute(string);
+get_instance_id_for_attribute(integer);
+get_instance_id_for_attribute(enumeration);
+get_instance_id_for_attribute(ordered_list);
+
+static ssize_t sure_admin_settings_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr,
+ char *buf, loff_t off, size_t count)
+{
+ int status = 0;
+ char *part = NULL;
+ char *attr_name = NULL;
+ char *attr_value = NULL;
+ int part_len = 0;
+ unsigned short *buffer = NULL;
+ unsigned short *tmpstr = NULL;
+ int buffer_size = (count + strlen(UTF_PREFIX)) * sizeof(unsigned short);
+
+ buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ tmpstr = buffer;
+ part = strsep(&buf, ",");
+ if (!part) {
+ status = -EINVAL;
+ goto exit_settings;
+ }
+ // Save attr_name
+ attr_name = kmalloc(strlen(part) + 1, GFP_KERNEL);
+ if (!attr_name) {
+ status = -EINVAL;
+ goto exit_settings;
+ }
+ strncpy(attr_name, part, strlen(part));
+
+ tmpstr = ascii_to_utf16_unicode(tmpstr, part);
+ part = strsep(&buf, ",");
+ if (!part) {
+ status = -EINVAL;
+ goto exit_settings;
+ }
+
+ part_len = strlen(part);
+
+ /* Add extra buffer space when encountering an empty string */
+ if (!part_len) {
+ buffer_size += sizeof(unsigned short);
+ part_len += sizeof(unsigned short);
+ }
+
+ // Save attr_value
+ attr_value = kmalloc(part_len + 1, GFP_KERNEL);
+ if (!attr_value) {
+ status = -EINVAL;
+ goto exit_settings;
+ }
+ strncpy(attr_value, part, part_len);
+
+ tmpstr = ascii_to_utf16_unicode(tmpstr, part);
+ part = strsep(&buf, ",");
+ if (!part) {
+ status = -EINVAL;
+ goto exit_settings;
+ }
+ part_len = strlen(part) - 1;
+ part[part_len] = '\0';
+
+ if (strncmp(part, 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
+ tmpstr = ascii_to_utf16_unicode(tmpstr, part);
+ // decrease buffer size allocated initially for UTF_PREFIX
+ buffer_size -= strlen(UTF_PREFIX) * sizeof(unsigned short);
+ } 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
+ part = kasprintf(GFP_KERNEL, "%s%s", UTF_PREFIX, part);
+ if (!part)
+ goto exit_settings;
+
+ tmpstr = ascii_to_utf16_unicode(tmpstr, part);
+ kfree(part);
+ }
+
+ part = strsep(&buf, ",");
+ if (part) {
+ status = -EINVAL;
+ goto exit_settings;
+ }
+
+ status = hp_wmi_set_bios_setting(buffer, buffer_size);
+ if (ACPI_FAILURE(status)) {
+ status = -EINVAL;
+ goto exit_settings;
+ }
+
+ if (attr_name == NULL)
+ pr_warn("Name is null\n");
+ if (attr_value == NULL)
+ pr_warn("Value is null\n");
+
+ update_attribute_value(attr_name, attr_value);
+
+
+exit_settings:
+ kfree(buffer);
+ kfree(attr_name);
+ kfree(attr_value);
+
+ if (ACPI_SUCCESS(status))
+ return count;
+
+ return status;
+}
+
+int update_attribute_value(char *attr_name, char *attr_value)
+{
+ int instance = -EIO;
+ int int_val;
+ int ret;
+
+ if (!attr_name || !attr_value)
+ return -EIO;
+
+ /* update value for the attribute */
+ instance = get_instance_id_for_string(attr_name);
+ if (instance >= 0) {
+ strscpy(bioscfg_drv.string_data[instance].current_value,
+ attr_value,
+ sizeof(bioscfg_drv.string_data[instance].current_value));
+
+ /*
+ * set pending reboot flag depending on
+ * "RequiresPhysicalPresence" value
+ */
+ if (bioscfg_drv.string_data[instance].requires_physical_presence)
+ bioscfg_drv.pending_reboot = TRUE;
+ goto exit_update_attribute;
+ }
+
+ instance = get_instance_id_for_integer(attr_name);
+ if (instance >= 0) {
+ ret = kstrtoint(attr_value, 10, &int_val);
+ if (!ret) {
+ bioscfg_drv.integer_data[instance].current_value = int_val;
+ /*
+ * set pending reboot flag depending on
+ * "RequiresPhysicalPresence" value
+ */
+ if (bioscfg_drv.integer_data[instance].requires_physical_presence)
+ bioscfg_drv.pending_reboot = TRUE;
+ }
+
+ goto exit_update_attribute;
+ }
+
+ instance = get_instance_id_for_enumeration(attr_name);
+ if (instance >= 0) {
+ strscpy(bioscfg_drv.enumeration_data[instance].current_value,
+ attr_value,
+ sizeof(bioscfg_drv.enumeration_data[instance].current_value));
+ /*
+ * set pending reboot flag depending on
+ * "RequiresPhysicalPresence" value
+ */
+ if (bioscfg_drv.enumeration_data[instance].requires_physical_presence)
+ bioscfg_drv.pending_reboot = TRUE;
+
+ goto exit_update_attribute;
+ }
+ instance = get_instance_id_for_ordered_list(attr_name);
+ if (instance >= 0) {
+ strscpy(bioscfg_drv.ordered_list_data[instance].current_value,
+ attr_value,
+ sizeof(bioscfg_drv.ordered_list_data[instance].current_value));
+
+ /*
+ * set pending reboot flag depending on
+ * "RequiresPhysicalPresence" value
+ */
+ if (bioscfg_drv.ordered_list_data[instance].requires_physical_presence)
+ bioscfg_drv.pending_reboot = TRUE;
+ }
+
+exit_update_attribute:
+ return instance;
+}
+
+static ssize_t sure_admin_settings_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ ssize_t ret;
+
+ /* clear the buffer when offset is pointing to the last position */
+ if (off >= bios_settings_size && bios_settings_size > 0) {
+ hp_bios_settings_free_buffer();
+ return 0;
+ }
+
+ /* clear the buffer whenever the read starts from the first position */
+ if (off == 0 && bios_settings_size > 0)
+ hp_bios_settings_free_buffer();
+
+ if (bios_settings_size == 0)
+ hp_bios_settings_fill_buffer();
+
+ mutex_lock(&bioscfg_drv.mutex);
+ ret = memory_read_from_buffer(buf, count, &off, bios_settings_buffer,
+ bios_settings_size);
+ mutex_unlock(&bioscfg_drv.mutex);
+
+ return ret;
+}
+
+HPWMI_BINATTR_RW(sure_admin, settings, 0);
+
+static struct bin_attribute *sure_admin_binattrs[] = {
+ &sure_admin_settings,
+ NULL,
+};
+
+static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "sure-admin\n");
+}
+static struct kobj_attribute sure_admin_type = __ATTR_RO(type);
+
+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 sure_admin_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", SURE_ADMIN_DESC);
+}
+static struct kobj_attribute sure_admin_display_name = __ATTR_RO(display_name);
+
+static struct attribute *sure_admin_attrs[] = {
+ &sure_admin_display_name.attr,
+ &sure_admin_display_langcode.attr,
+ &sure_admin_type.attr,
+ NULL,
+};
+
+static const struct attribute_group sure_admin_attr_group = {
+ .attrs = sure_admin_attrs,
+ .bin_attrs = sure_admin_binattrs,
+};
+
+void exit_sure_admin_attributes(void)
+{
+ sysfs_remove_group(bioscfg_drv.sure_admin_attr_kobj, &sure_admin_attr_group);
+}
+
+int populate_sure_admin_data(struct kobject *attr_name_kobj)
+{
+ bioscfg_drv.sure_admin_attr_kobj = attr_name_kobj;
+ return sysfs_create_group(attr_name_kobj, &sure_admin_attr_group);
+}
+
+int hp_bios_settings_fill_buffer(void)
+{
+ int status = 0;
+ int initial_buffer_size = 20 * PAGE_SIZE;
+
+ mutex_lock(&bioscfg_drv.mutex);
+ bios_settings_buffer = kmalloc(initial_buffer_size, GFP_KERNEL);
+ mutex_unlock(&bioscfg_drv.mutex);
+ if (!bios_settings_buffer)
+ return -ENOMEM;
+
+ mutex_lock(&bioscfg_drv.mutex);
+ buf_alloc_size = ksize(bios_settings_buffer);
+ memset(bios_settings_buffer, 0x00, buf_alloc_size);
+ bios_settings_size = snprintf(bios_settings_buffer,
+ buf_alloc_size, "[\n");
+ mutex_unlock(&bioscfg_drv.mutex);
+
+ status = append_read_settings(HPWMI_STRING_TYPE,
+ &bios_settings_buffer,
+ &bios_settings_size,
+ &buf_alloc_size);
+ if (ACPI_FAILURE(status))
+ pr_err("error 0x%x occurred retrieving string instances\n", status);
+
+ status = append_read_settings(HPWMI_INTEGER_TYPE,
+ &bios_settings_buffer,
+ &bios_settings_size,
+ &buf_alloc_size);
+ if (ACPI_FAILURE(status))
+ pr_err("error 0x%x occurred retrieving integer instances\n", status);
+
+ status = append_read_settings(HPWMI_ENUMERATION_TYPE,
+ &bios_settings_buffer,
+ &bios_settings_size,
+ &buf_alloc_size);
+ if (ACPI_FAILURE(status))
+ pr_err("error 0x%x occurred retrieving enumeration instances\n", status);
+
+ status = append_read_settings(HPWMI_ORDERED_LIST_TYPE,
+ &bios_settings_buffer,
+ &bios_settings_size,
+ &buf_alloc_size);
+ if (ACPI_FAILURE(status))
+ pr_err("error 0x%x occurred retrieving ordered list instances\n", status);
+
+ status = append_read_settings(HPWMI_PASSWORD_TYPE,
+ &bios_settings_buffer,
+ &bios_settings_size,
+ &buf_alloc_size);
+ if (ACPI_FAILURE(status))
+ pr_err("error 0x%x occurred retrieving password list instances\n", status);
+
+ mutex_lock(&bioscfg_drv.mutex);
+ /*
+ * remove trailing comma
+ */
+ if (bios_settings_size >= 3) {
+ if (bios_settings_buffer[bios_settings_size - 2] == ',')
+ bios_settings_buffer[bios_settings_size - 2] = ' ';
+ }
+ bios_settings_size = snprintf(bios_settings_buffer,
+ buf_alloc_size, "%s]\n",
+ bios_settings_buffer);
+ mutex_unlock(&bioscfg_drv.mutex);
+
+ return bios_settings_size;
+}
+
+int hp_bios_settings_free_buffer(void)
+{
+ mutex_lock(&bioscfg_drv.mutex);
+ kfree(bios_settings_buffer);
+ bios_settings_size = 0;
+ buf_alloc_size = 0;
+ mutex_unlock(&bioscfg_drv.mutex);
+
+ return 0;
+}
+int hp_bios_settings_realloc_buffer(char **buf, int *buf_size, int *alloc_size)
+{
+ int new_buffer_size;
+ char *new_buf = NULL;
+ int ret = 0;
+
+ if (*buf_size + PAGE_SIZE >= *alloc_size) {
+ new_buffer_size = buf_alloc_size + 2 * PAGE_SIZE;
+
+ mutex_lock(&bioscfg_drv.mutex);
+ new_buf = krealloc(*buf, new_buffer_size, GFP_KERNEL);
+ mutex_unlock(&bioscfg_drv.mutex);
+ if (new_buf) {
+ mutex_lock(&bioscfg_drv.mutex);
+ *buf = new_buf;
+ *alloc_size = ksize(new_buf);
+ mutex_unlock(&bioscfg_drv.mutex);
+ } else {
+ hp_bios_settings_free_buffer();
+ ret = -ENOMEM;
+ }
+ }
+
+ return ret;
+}
+
+int append_read_settings(enum hp_wmi_data_type type, char **buf,
+ int *buf_size, int *alloc_size)
+{
+ int ret = 0;
+ int status = 0;
+ int instance = 0;
+ int instance_count = 0;
+
+ switch (type) {
+ case HPWMI_STRING_TYPE:
+ instance_count = bioscfg_drv.string_instances_count;
+ break;
+ case HPWMI_INTEGER_TYPE:
+ instance_count = bioscfg_drv.integer_instances_count;
+ break;
+ case HPWMI_ENUMERATION_TYPE:
+ instance_count = bioscfg_drv.enumeration_instances_count;
+ break;
+ case HPWMI_ORDERED_LIST_TYPE:
+ instance_count = bioscfg_drv.ordered_list_instances_count;
+ break;
+ case HPWMI_PASSWORD_TYPE:
+ instance_count = bioscfg_drv.password_instances_count;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /*
+ * Query all the instances
+ */
+ for (instance = 0; instance < instance_count; instance++) {
+ mutex_lock(&bioscfg_drv.mutex);
+ status = append_read_attributes(buf, *alloc_size,
+ instance, type);
+ if (status > 0)
+ *buf_size = status;
+
+ mutex_unlock(&bioscfg_drv.mutex);
+
+ ret = hp_bios_settings_realloc_buffer(buf, buf_size,
+ alloc_size);
+ }
+ return ret;
+}
+
+int append_read_attributes(char **buf, int alloc_size,
+ int instance, enum hp_wmi_data_type type)
+{
+ int status = 0;
+
+ switch (type) {
+ case HPWMI_STRING_TYPE:
+ status = append_read_string_attributes(*buf, alloc_size,
+ instance, type);
+ break;
+ case HPWMI_INTEGER_TYPE:
+ status = append_read_integer_attributes(*buf, alloc_size,
+ instance, type);
+ break;
+ case HPWMI_ENUMERATION_TYPE:
+ status = append_read_enumeration_attributes(*buf,
+ alloc_size,
+ instance, type);
+ break;
+ case HPWMI_ORDERED_LIST_TYPE:
+ status = append_read_ordered_list_attributes(*buf,
+ alloc_size,
+ instance, type);
+ break;
+ case HPWMI_PASSWORD_TYPE:
+ status = append_read_password_attributes(*buf,
+ alloc_size,
+ instance, type);
+ break;
+ default:
+ status = -EINVAL;
+ break;
+ }
+ return status;
+}
+
+
+int append_read_string_attributes(char *buf, int alloc_size,
+ int instance,
+ enum hp_wmi_data_type type)
+{
+ int buf_size;
+ char *part_tmp = NULL;
+ char *part = NULL;
+
+ if (type >= ARRAY_SIZE(hp_wmi_classes) || !buf)
+ return -EINVAL;
+
+ buf_size = snprintf(buf, alloc_size, "%s{\n", buf);
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Class\": \"%s\",\n",
+ buf, hp_wmi_classes[type]);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Name\": \"%s\",\n",
+ buf,
+ bioscfg_drv.string_data[instance].display_name);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Value\": \"%s\",\n",
+ buf,
+ bioscfg_drv.string_data[instance].current_value);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Path\": \"%s\",\n",
+ buf,
+ bioscfg_drv.string_data[instance].path);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"IsReadOnly\": %d,\n",
+ buf,
+ bioscfg_drv.string_data[instance].is_readonly);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"DisplayInUI\": %d,\n",
+ buf,
+ bioscfg_drv.string_data[instance].display_in_ui);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"RequiresPhysicalPresence\": %d,\n",
+ buf,
+ bioscfg_drv.string_data[instance].requires_physical_presence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Sequence\": %d,\n",
+ buf,
+ bioscfg_drv.string_data[instance].sequence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"PrerequisiteSize\": %d,\n",
+ buf,
+ bioscfg_drv.string_data[instance].prerequisitesize);
+
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Prerequisites\": [\n", buf);
+
+ if (bioscfg_drv.string_data[instance].prerequisitesize) {
+ part_tmp = kstrdup(bioscfg_drv.string_data[instance].prerequisites,
+ GFP_KERNEL);
+ part = strsep(&part_tmp, ";");
+ while (part) {
+ buf_size = snprintf(buf, alloc_size, "%s\t\t\"%s\"", buf, part);
+ part = strsep(&part_tmp, ";");
+ if (part)
+ buf_size = snprintf(buf, alloc_size, "%s,\n", buf);
+ else
+ buf_size = snprintf(buf, alloc_size, "%s\n", buf);
+ }
+ kfree(part_tmp);
+ part_tmp = NULL;
+ }
+ buf_size = snprintf(buf, alloc_size, "%s\t],\n", buf);
+
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"SecurityLevel\": %d,\n",
+ buf,
+ bioscfg_drv.string_data[instance].security_level);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"MinLength\": %d,\n",
+ buf,
+ bioscfg_drv.string_data[instance].min_length);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"MaxLength\": %d\n",
+ buf,
+ bioscfg_drv.string_data[instance].max_length);
+
+ return snprintf(buf, alloc_size, "%s},\n", buf);
+}
+
+
+int append_read_integer_attributes(char *buf, int alloc_size,
+ int instance,
+ enum hp_wmi_data_type type)
+{
+ int buf_size;
+ char *part_tmp = NULL;
+ char *part = NULL;
+
+ if (type >= ARRAY_SIZE(hp_wmi_classes) || !buf)
+ return -EINVAL;
+
+ buf_size = snprintf(buf, alloc_size, "%s{\n", buf);
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Class\": \"%s\",\n",
+ buf, hp_wmi_classes[type]);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Name\": \"%s\",\n",
+ buf,
+ bioscfg_drv.integer_data[instance].display_name);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Value\": \"%d\",\n",
+ buf,
+ bioscfg_drv.integer_data[instance].current_value);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Path\": \"%s\",\n",
+ buf,
+ bioscfg_drv.integer_data[instance].path);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"IsReadOnly\": %d,\n",
+ buf,
+ bioscfg_drv.integer_data[instance].is_readonly);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"DisplayInUI\": %d,\n",
+ buf,
+ bioscfg_drv.integer_data[instance].display_in_ui);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"RequiresPhysicalPresence\": %d,\n",
+ buf,
+ bioscfg_drv.integer_data[instance].requires_physical_presence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Sequence\": %d,\n",
+ buf,
+ bioscfg_drv.integer_data[instance].sequence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"PrerequisiteSize\": %d,\n",
+ buf,
+ bioscfg_drv.integer_data[instance].prerequisitesize);
+
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Prerequisites\": [\n", buf);
+
+ if (bioscfg_drv.integer_data[instance].prerequisitesize) {
+ part_tmp = kstrdup(bioscfg_drv.integer_data[instance].prerequisites,
+ GFP_KERNEL);
+ part = strsep(&part_tmp, ";");
+ while (part) {
+ buf_size = snprintf(buf, alloc_size, "%s\t\t\"%s\"", buf, part);
+ part = strsep(&part_tmp, ";");
+ if (part)
+ buf_size = snprintf(buf, alloc_size, "%s,\n", buf);
+ else
+ buf_size = snprintf(buf, alloc_size, "%s\n", buf);
+ }
+ kfree(part_tmp);
+ part_tmp = NULL;
+ }
+ buf_size = snprintf(buf, alloc_size, "%s\t],\n", buf);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"SecurityLevel\": %d,\n",
+ buf,
+ bioscfg_drv.integer_data[instance].security_level);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"LowerBound\": %d,\n",
+ buf,
+ bioscfg_drv.integer_data[instance].lower_bound);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"UpperBound\": %d,\n",
+ buf,
+ bioscfg_drv.integer_data[instance].upper_bound);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"IntValue\": %d\n",
+ buf,
+ bioscfg_drv.integer_data[instance].scalar_increment);
+
+ return snprintf(buf, alloc_size, "%s},\n", buf);
+}
+
+int append_read_enumeration_attributes(char *buf, int alloc_size,
+ int instance,
+ enum hp_wmi_data_type type)
+{
+ int buf_size;
+ char *part_tmp = NULL;
+ char *part = NULL;
+
+ if (type >= ARRAY_SIZE(hp_wmi_classes) || !buf)
+ return -EINVAL;
+
+ buf_size = snprintf(buf, alloc_size, "%s{\n", buf);
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Class\": \"%s\",\n",
+ buf, hp_wmi_classes[type]);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Name\": \"%s\",\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].display_name);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Path\": \"%s\",\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].path);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"IsReadOnly\": %d,\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].is_readonly);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"DisplayInUI\": %d,\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].display_in_ui);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"RequiresPhysicalPresence\": %d,\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].requires_physical_presence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Sequence\": %d,\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].sequence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"PrerequisiteSize\": %d,\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].prerequisitesize);
+
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Prerequisites\": [\n", buf);
+
+ if (bioscfg_drv.enumeration_data[instance].prerequisitesize) {
+ part_tmp = kstrdup(bioscfg_drv.enumeration_data[instance].prerequisites,
+ GFP_KERNEL);
+ part = strsep(&part_tmp, ";");
+ while (part) {
+ buf_size = snprintf(buf, alloc_size, "%s\t\t\"%s\"", buf, part);
+ part = strsep(&part_tmp, ";");
+ if (part)
+ buf_size = snprintf(buf, alloc_size, "%s,\n", buf);
+ else
+ buf_size = snprintf(buf, alloc_size, "%s\n", buf);
+ }
+ kfree(part_tmp);
+ part_tmp = NULL;
+ }
+ buf_size = snprintf(buf, alloc_size, "%s\t],\n", buf);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"SecurityLevel\": %d,\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].security_level);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Value\": \"%s\",\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].current_value);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Size\": %d,\n",
+ buf,
+ bioscfg_drv.enumeration_data[instance].size);
+
+ buf_size = snprintf(buf, alloc_size, "%s\t\"PossibleValues\": [\n", buf);
+
+ if (bioscfg_drv.enumeration_data[instance].size) {
+ part_tmp = kstrdup(bioscfg_drv.enumeration_data[instance].possible_values,
+ GFP_KERNEL);
+ part = strsep(&part_tmp, ";");
+ while (part) {
+ buf_size = snprintf(buf, alloc_size, "%s\t\t\"%s\"", buf, part);
+ part = strsep(&part_tmp, ";");
+ if (part)
+ buf_size = snprintf(buf, alloc_size, "%s,\n", buf);
+ else
+ buf_size = snprintf(buf, alloc_size, "%s\n", buf);
+ }
+ kfree(part_tmp);
+ part_tmp = NULL;
+ }
+ buf_size = snprintf(buf, alloc_size, "%s\t]\n", buf);
+
+ return snprintf(buf, alloc_size, "%s},\n", buf);
+}
+
+int append_read_ordered_list_attributes(char *buf, int alloc_size,
+ int instance,
+ enum hp_wmi_data_type type)
+{
+ int buf_size;
+ char *part_tmp = NULL;
+ char *part = NULL;
+
+ if (type >= ARRAY_SIZE(hp_wmi_classes) || !buf)
+ return -EINVAL;
+
+ buf_size = snprintf(buf, alloc_size, "%s{\n", buf);
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Class\": \"%s\",\n",
+ buf, hp_wmi_classes[type]);
+
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Name\": \"%s\",\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].display_name);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Value\": \"%s\",\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].current_value);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Path\": \"%s\",\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].path);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"IsReadOnly\": %d,\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].is_readonly);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"DisplayInUI\": %d,\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].display_in_ui);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"RequiresPhysicalPresence\": %d,\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].requires_physical_presence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Sequence\": %d,\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].sequence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"PrerequisiteSize\": %d,\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].prerequisitesize);
+
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Prerequisites\": [\n", buf);
+
+ if (bioscfg_drv.ordered_list_data[instance].prerequisitesize) {
+ part_tmp = kstrdup(bioscfg_drv.ordered_list_data[instance].prerequisites,
+ GFP_KERNEL);
+ part = strsep(&part_tmp, ";");
+ while (part) {
+ buf_size = snprintf(buf, alloc_size, "%s\t\t\"%s\"", buf, part);
+ part = strsep(&part_tmp, ";");
+ if (part)
+ buf_size = snprintf(buf, alloc_size, "%s,\n", buf);
+ else
+ buf_size = snprintf(buf, alloc_size, "%s\n", buf);
+ }
+ kfree(part_tmp);
+ part_tmp = NULL;
+ }
+ buf_size = snprintf(buf, alloc_size, "%s\t],\n", buf);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"SecurityLevel\": %d,\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].security_level);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Size\": %d,\n",
+ buf,
+ bioscfg_drv.ordered_list_data[instance].size);
+
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Elements\": [\n", buf);
+
+ if (bioscfg_drv.ordered_list_data[instance].size) {
+ part_tmp = kstrdup(bioscfg_drv.ordered_list_data[instance].elements,
+ GFP_KERNEL);
+ part = strsep(&part_tmp, ";");
+ while (part) {
+ buf_size = snprintf(buf, alloc_size, "%s\t\t\"%s\"", buf, part);
+ part = strsep(&part_tmp, ";");
+ if (part)
+ buf_size = snprintf(buf, alloc_size, "%s,\n", buf);
+ else
+ buf_size = snprintf(buf, alloc_size, "%s\n", buf);
+ }
+ kfree(part_tmp);
+ part_tmp = NULL;
+ }
+ buf_size = snprintf(buf, alloc_size, "%s\t]\n", buf);
+
+ return snprintf(buf, alloc_size, "%s},\n", buf);
+}
+
+
+int append_read_password_attributes(char *buf, int alloc_size,
+ int instance,
+ enum hp_wmi_data_type type)
+{
+ int buf_size;
+ char *part_tmp = NULL;
+ char *part = NULL;
+
+ if (type >= ARRAY_SIZE(hp_wmi_classes) || !buf)
+ return -EINVAL;
+
+ buf_size = snprintf(buf, alloc_size, "%s{\n", buf);
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Class\": \"%s\",\n",
+ buf, hp_wmi_classes[type]);
+
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Name\": \"%s\",\n",
+ buf,
+ bioscfg_drv.password_data[instance].display_name);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Value\": \"%s\",\n",
+ buf,
+ bioscfg_drv.password_data[instance].current_password);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Path\": \"%s\",\n",
+ buf,
+ bioscfg_drv.password_data[instance].path);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"IsReadOnly\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].is_readonly);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"DisplayInUI\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].display_in_ui);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"RequiresPhysicalPresence\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].requires_physical_presence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Sequence\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].sequence);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"PrerequisiteSize\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].prerequisitesize);
+
+ buf_size = snprintf(buf, alloc_size, "%s\t\"Prerequisites\": [\n", buf);
+
+ if (bioscfg_drv.password_data[instance].prerequisitesize) {
+ part_tmp = kstrdup(bioscfg_drv.password_data[instance].prerequisites,
+ GFP_KERNEL);
+ part = strsep(&part_tmp, ";");
+ while (part) {
+ buf_size = snprintf(buf, alloc_size, "%s\t\t\"%s\"", buf, part);
+ part = strsep(&part_tmp, ";");
+ if (part)
+ buf_size = snprintf(buf, alloc_size, "%s,\n", buf);
+ else
+ buf_size = snprintf(buf, alloc_size, "%s\n", buf);
+ }
+ kfree(part_tmp);
+ part_tmp = NULL;
+ }
+ buf_size = snprintf(buf, alloc_size, "%s\t],\n", buf);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"SecurityLevel\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].security_level);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"MinLength\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].min_password_length);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"MaxLength\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].max_password_length);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"Size\": %d,\n",
+ buf,
+ bioscfg_drv.password_data[instance].encoding_size);
+
+ buf_size = snprintf(buf, alloc_size, "%s\t\"SupportedEncoding\": [\n", buf);
+
+ if (bioscfg_drv.password_data[instance].encoding_size) {
+ part_tmp = kstrdup(bioscfg_drv.password_data[instance].supported_encoding,
+ GFP_KERNEL);
+ part = strsep(&part_tmp, ";");
+ while (part) {
+ buf_size = snprintf(buf, alloc_size, "%s\t\t\"%s\"", buf, part);
+ part = strsep(&part_tmp, ";");
+ if (part)
+ buf_size = snprintf(buf, alloc_size, "%s,\n", buf);
+ else
+ buf_size = snprintf(buf, alloc_size, "%s\n", buf);
+ }
+ kfree(part_tmp);
+ part_tmp = NULL;
+ }
+ buf_size = snprintf(buf, alloc_size, "%s\t],\n", buf);
+
+ buf_size = snprintf(buf, alloc_size,
+ "%s\t\"IsSet\": %d\n",
+ buf,
+ bioscfg_drv.password_data[instance].is_enabled);
+
+ return snprintf(buf, alloc_size, "%s},\n", buf);
+}
diff --git a/drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c
new file mode 100644
index 000000000000..41c5a549f2ca
--- /dev/null
+++ b/drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Functions corresponding to sure start object type attributes under
+ * BIOS for use with hp-bioscfg driver
+ *
+ * Copyright (c) 2022 HP Development Company, L.P.
+ */
+
+#include "bioscfg.h"
+#include <asm-generic/posix_types.h>
+
+#define LOG_MAX_ENTRIES 254
+#define LOG_ENTRY_SIZE 16
+
+/*
+ * audit_log_entry_count_show - Reports the number of
+ * existing audit log entries available
+ * to be read
+ *
+ * @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 existing audit log entries available to be read,
+ * audit log entry size, and maximum number of entries
+ * supported. Otherwise, an HP WMI query specific error code
+ * (which is negative)
+ *
+ * [No of entries],[log entry size],[Max number of entries supported]
+ */
+static ssize_t audit_log_entry_count_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ int ret;
+ u32 count = 0;
+
+ ret = hp_wmi_perform_query(HPWMI_SURESTART_GET_LOG_COUNT, HPWMI_SURESTART,
+ &count, 0, sizeof(count));
+ if (ret < 0)
+ return ret;
+
+ return snprintf(buf, PAGE_SIZE, "%d,%d,%d\n", count, LOG_ENTRY_SIZE, LOG_MAX_ENTRIES);
+}
+
+/*
+ * audit_log_entries_show() - Return all entries found in log file
+ *
+ * @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 needed to read all audit logs entries to be read.
+ * Otherwise, an HP WMI query specific error code (which is negative)
+ * -EFAULT if the audit logs size exceeds 4KB
+ *
+ */
+static ssize_t audit_log_entries_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ int ret;
+ int i;
+ u32 count = 0;
+
+ // Get the number of event logs
+ ret = hp_wmi_perform_query(HPWMI_SURESTART_GET_LOG_COUNT, HPWMI_SURESTART,
+ &count, 1, 4);
+
+ /*
+ * The show() api will not work if the audit logs ever go
+ * beyond 4KB
+ */
+ if (count * LOG_ENTRY_SIZE > PAGE_SIZE)
+ return -EFAULT;
+
+ if (ret < 0)
+ return ret;
+
+ /*
+ * We are guaranteed the buffer is 4KB so today all the event
+ * logs will fit
+ */
+ for (i = 0; ((i < count) & (ret >= 0)); i++) {
+ *buf = (i + 1);
+ ret = hp_wmi_perform_query(HPWMI_SURESTART_GET_LOG,
+ HPWMI_SURESTART,
+ buf, 1, 128);
+ if (ret >= 0)
+ buf += LOG_ENTRY_SIZE;
+ }
+ return (count * LOG_ENTRY_SIZE);
+}
+
+static struct kobj_attribute sure_start_audit_log_entry_count = __ATTR_RO(audit_log_entry_count);
+struct kobj_attribute sure_start_audit_log_entries = __ATTR_RO(audit_log_entries);
+
+static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "sure-start\n");
+}
+static struct kobj_attribute sure_start_type = __ATTR_RO(type);
+
+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 sure_start_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", SURE_START_DESC);
+}
+static struct kobj_attribute sure_start_display_name = __ATTR_RO(display_name);
+
+static struct attribute *sure_start_attrs[] = {
+ &sure_start_display_name.attr,
+ &sure_start_display_langcode.attr,
+ &sure_start_audit_log_entry_count.attr,
+ &sure_start_audit_log_entries.attr,
+ &sure_start_type.attr,
+ NULL,
+};
+
+static const struct attribute_group sure_start_attr_group = {
+ .attrs = sure_start_attrs,
+};
+
+void exit_sure_start_attributes(void)
+{
+ sysfs_remove_group(bioscfg_drv.sure_start_attr_kobj, &sure_start_attr_group);
+}
+
+int populate_sure_start_data(struct kobject *attr_name_kobj)
+{
+ bioscfg_drv.sure_start_attr_kobj = attr_name_kobj;
+ return sysfs_create_group(attr_name_kobj, &sure_start_attr_group);
+}
--
2.34.1
