73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* AMD Secure Processor Dynamic Boost Control sample library
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*
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* Copyright (C) 2023 Advanced Micro Devices, Inc.
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*
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* Author: Mario Limonciello <mario.limonciello@amd.com>
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*/
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#include <assert.h>
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#include <string.h>
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#include <sys/ioctl.h>
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/* if uapi header isn't installed, this might not yet exist */
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#ifndef __packed
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#define __packed __attribute__((packed))
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#endif
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#include <linux/psp-dbc.h>
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int get_nonce(int fd, void *nonce_out, void *signature)
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{
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struct dbc_user_nonce tmp = {
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.auth_needed = !!signature,
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};
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int ret;
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assert(nonce_out);
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if (signature)
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memcpy(tmp.signature, signature, sizeof(tmp.signature));
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ret = ioctl(fd, DBCIOCNONCE, &tmp);
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if (ret)
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return ret;
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memcpy(nonce_out, tmp.nonce, sizeof(tmp.nonce));
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return 0;
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}
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int set_uid(int fd, __u8 *uid, __u8 *signature)
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{
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struct dbc_user_setuid tmp;
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assert(uid);
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assert(signature);
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memcpy(tmp.uid, uid, sizeof(tmp.uid));
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memcpy(tmp.signature, signature, sizeof(tmp.signature));
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return ioctl(fd, DBCIOCUID, &tmp);
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}
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int process_param(int fd, int msg_index, __u8 *signature, int *data)
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{
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struct dbc_user_param tmp = {
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.msg_index = msg_index,
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.param = *data,
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};
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int ret;
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assert(signature);
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assert(data);
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memcpy(tmp.signature, signature, sizeof(tmp.signature));
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ret = ioctl(fd, DBCIOCPARAM, &tmp);
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if (ret)
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return ret;
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*data = tmp.param;
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return 0;
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}
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