1 // SPDX-License-Identifier: GPL-2.0-only
3 * AMD Secure Processor Dynamic Boost Control sample library
5 * Copyright (C) 2023 Advanced Micro Devices, Inc.
7 * Author: Mario Limonciello <mario.limonciello@amd.com>
13 #include <sys/ioctl.h>
15 /* if uapi header isn't installed, this might not yet exist */
17 #define __packed __attribute__((packed))
19 #include <linux/psp-dbc.h>
21 int get_nonce(int fd, void *nonce_out, void *signature)
23 struct dbc_user_nonce tmp = {
24 .auth_needed = !!signature,
30 memcpy(tmp.signature, signature, sizeof(tmp.signature));
32 if (ioctl(fd, DBCIOCNONCE, &tmp))
34 memcpy(nonce_out, tmp.nonce, sizeof(tmp.nonce));
39 int set_uid(int fd, __u8 *uid, __u8 *signature)
41 struct dbc_user_setuid tmp;
46 memcpy(tmp.uid, uid, sizeof(tmp.uid));
47 memcpy(tmp.signature, signature, sizeof(tmp.signature));
49 if (ioctl(fd, DBCIOCUID, &tmp))
54 int process_param(int fd, int msg_index, __u8 *signature, int *data)
56 struct dbc_user_param tmp = {
57 .msg_index = msg_index,
65 memcpy(tmp.signature, signature, sizeof(tmp.signature));
67 if (ioctl(fd, DBCIOCPARAM, &tmp))
71 memcpy(signature, tmp.signature, sizeof(tmp.signature));