Re: [PATCH v15 02/13] hp-bioscfg: bioscfg-h

[Jorge Lopez]

On Fri, May 26, 2023 at 10:14 AM Thomas Weißschuh <thomas@xxxxxxxx> wrote:
>
> Hi Jorge,
>
> sorry for the long delay.

No worries.  I got Covid while you were away so I am slowly coming back.

> Here we go again :-)
>
> On 2023-05-19 15:12:49-0500, Jorge Lopez wrote:
>
> <snip>
>
> > ---
> >  drivers/platform/x86/hp/hp-bioscfg/bioscfg.h | 486 +++++++++++++++++++
> >  1 file changed, 486 insertions(+)
> >  create mode 100644 drivers/platform/x86/hp/hp-bioscfg/bioscfg.h
> >
> > diff --git a/drivers/platform/x86/hp/hp-bioscfg/bioscfg.h b/drivers/platform/x86/hp/hp-bioscfg/bioscfg.h
> > new file mode 100644
> > index 000000000000..3a3b24f766d2
> > --- /dev/null
> > +++ b/drivers/platform/x86/hp/hp-bioscfg/bioscfg.h
> > @@ -0,0 +1,486 @@
> > +/* SPDX-License-Identifier: GPL-2.0
> > + *
> > + * Definitions for kernel modules using hp_bioscfg driver
> > + *
> > + *  Copyright (c) 2022 HP Development Company, L.P.
> > + */
> > +
> > +#ifndef _HP_BIOSCFG_H_
> > +#define _HP_BIOSCFG_H_
> > +
> > +#include <linux/wmi.h>
> > +#include <linux/types.h>
> > +#include <linux/device.h>
> > +#include <linux/module.h>
> > +#include <linux/kernel.h>
> > +#include <linux/capability.h>
>
> Is this needed?

+#include <linux/capability.h> is not needed.  It will be removed.

>
> > +#include <linux/nls.h>
> > +
> > +#define DRIVER_NAME          "hp-bioscfg"
> > +
> > +#define MAX_BUFF_SIZE                512
> > +#define MAX_KEY_MOD_SIZE     256
> > +#define MAX_PASSWD_SIZE              64
> > +#define MAX_PREREQUISITES_SIZE       20
> > +#define MAX_REQ_ELEM_SIZE    128
> > +#define MAX_VALUES_SIZE              16
> > +#define MAX_ENCODINGS_SIZE   16
> > +#define MAX_ELEMENTS_SIZE    16
> > +
> > +#define SPM_STR_DESC         "Secure Platform Management"
> > +#define SPM_STR                      "SPM"
> > +#define SURE_START_DESC              "Sure Start"
> > +#define SURE_START_STR               "Sure_Start"
> > +#define SETUP_PASSWD         "Setup Password"
> > +#define POWER_ON_PASSWD              "Power-On Password"
> > +
> > +#define LANG_CODE_STR                "en_US.UTF-8"
> > +#define SCHEDULE_POWER_ON    "Scheduled Power-On"
> > +
> > +#define COMMA_SEP            ","
> > +#define SEMICOLON_SEP                ";"
> > +
> > +/* Sure Admin Functions */
> > +
> > +#define UTF_PREFIX           "<utf-16/>"
> > +#define BEAM_PREFIX          "<BEAM/>"
> > +
> > +enum mechanism_values {
> > +     PASSWORD                = 0x00,
> > +     SIGNING_KEY             = 0x01,
> > +     ENDORSEMENT_KEY         = 0x02,
> > +};
> > +
> > +#define BIOS_ADMIN           "bios-admin"
> > +#define POWER_ON             "power-on"
> > +#define BIOS_SPM             "enhanced-bios-auth"
> > +
> > +#define PASSWD_MECHANISM_TYPES "password"
> > +
> > +#define HP_WMI_BIOS_GUID             "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
> > +
> > +#define HP_WMI_BIOS_STRING_GUID              "988D08E3-68F4-4c35-AF3E-6A1B8106F83C"
> > +#define HP_WMI_BIOS_INTEGER_GUID     "8232DE3D-663D-4327-A8F4-E293ADB9BF05"
> > +#define HP_WMI_BIOS_ENUMERATION_GUID "2D114B49-2DFB-4130-B8FE-4A3C09E75133"
> > +#define HP_WMI_BIOS_ORDERED_LIST_GUID        "14EA9746-CE1F-4098-A0E0-7045CB4DA745"
> > +#define HP_WMI_BIOS_PASSWORD_GUID    "322F2028-0F84-4901-988E-015176049E2D"
> > +#define HP_WMI_SET_BIOS_SETTING_GUID "1F4C91EB-DC5C-460b-951D-C7CB9B4B8D5E"
> > +
> > +enum hp_wmi_spm_commandtype {
> > +     HPWMI_SECUREPLATFORM_GET_STATE  = 0x10,
> > +     HPWMI_SECUREPLATFORM_SET_KEK    = 0x11,
> > +     HPWMI_SECUREPLATFORM_SET_SK     = 0x12,
> > +};
> > +
> > +enum hp_wmi_surestart_commandtype {
> > +     HPWMI_SURESTART_GET_LOG_COUNT   = 0x01,
> > +     HPWMI_SURESTART_GET_LOG         = 0x02,
> > +};
> > +
> > +enum hp_wmi_command {
> > +     HPWMI_READ              = 0x01,
> > +     HPWMI_WRITE             = 0x02,
> > +     HPWMI_ODM               = 0x03,
> > +     HPWMI_SURESTART         = 0x20006,
> > +     HPWMI_GM                = 0x20008,
> > +     HPWMI_SECUREPLATFORM    = 0x20010,
> > +};
> > +
> > +struct bios_return {
> > +     u32 sigpass;
> > +     u32 return_code;
> > +};
> > +

<snip>

> > +
> > +struct secure_platform_data {
> > +     struct kobject *attr_name_kobj;
> > +     u8 attribute_name[MAX_BUFF_SIZE];
> > +     u8 *endorsement_key;
> > +     u8 *signing_key;
> > +     u8 *auth_token;
> > +     bool is_enabled;
> > +     u32 mechanism;
> > +};
> > +
> > +struct bioscfg_priv {
> > +     struct wmi_device *bios_attr_wdev;
>
> This wmi_device is never really used.

bios_attr_wdev will be removed from this file and biosattr-interface.c

>
> > +     struct kset *authentication_dir_kset;
> > +     struct kset *main_dir_kset;
> > +     struct device *class_dev;
> > +     struct string_data *string_data;
> > +     u32 string_instances_count;
> > +     struct integer_data *integer_data;
> > +     u32 integer_instances_count;
> > +     struct enumeration_data *enumeration_data;
> > +     u32 enumeration_instances_count;
> > +     struct ordered_list_data *ordered_list_data;
> > +     u32 ordered_list_instances_count;
> > +     struct password_data *password_data;
> > +     u32 password_instances_count;
> > +
> > +     struct kobject *sure_start_attr_kobj;
> > +     struct secure_platform_data spm_data;
> > +     u8 display_name_language_code[MAX_BUFF_SIZE];
> > +     bool pending_reboot;
> > +     struct mutex mutex;
> > +};
> > +
> > +/* global structure used by multiple WMI interfaces */
> > +extern struct bioscfg_priv bioscfg_drv;
> > +
> > +enum hp_wmi_data_type {
> > +     HPWMI_STRING_TYPE,
> > +     HPWMI_INTEGER_TYPE,
> > +     HPWMI_ENUMERATION_TYPE,
> > +     HPWMI_ORDERED_LIST_TYPE,
> > +     HPWMI_PASSWORD_TYPE,
> > +     HPWMI_SECURE_PLATFORM_TYPE,
> > +     HPWMI_SURE_START_TYPE,
> > +};
> > +

<snip>

> > +/* Bioscfg */
> > +
> > +void hp_exit_attr_set_interface(void);
> > +int hp_init_attr_set_interface(void);
> > +size_t hp_calculate_string_buffer(const char *str);
> > +size_t hp_calculate_security_buffer(const char *authentication);
> > +void *hp_ascii_to_utf16_unicode(u16 *p, const u8 *str);
> > +int hp_get_integer_from_buffer(u8 **buffer, u32 *buffer_size, u32 *integer);
> > +int hp_get_string_from_buffer(u8 **buffer, u32 *buffer_size, char *dst, u32 dst_size);
> > +int hp_convert_hexstr_to_str(const char *input, u32 input_len, char **str, int *len);
> > +int hp_encode_outsize_for_pvsz(int outsize);
> > +int hp_enforce_single_line_input(char *buf, size_t count);
> > +void hp_set_reboot_and_signal_event(void);
> > +ssize_t display_name_language_code_show(struct kobject *kobj,
> > +                                     struct kobj_attribute *attr,
> > +                                     char *buf);
> > +union acpi_object *hp_get_wmiobj_pointer(int instance_id, const char *guid_string);
> > +int hp_get_instance_count(const char *guid_string);
> > +void hp_update_attribute_permissions(bool isreadonly, struct kobj_attribute *current_val);
> > +void hp_friendly_user_name_update(char *path, const char *attr_name,
> > +                               char *attr_display, int attr_size);
> > +int hp_wmi_error_and_message(int error_code);
> > +
> > +#endif
> > --
> > 2.34.1
> >