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| 2 | |
| 3 | * AMD Secure Processor Dynamic Boost Control sample library
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| 4 | *
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| 5 | * Copyright (C) 2023 Advanced Micro Devices, Inc.
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| 6 | *
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| 7 | * Author: Mario Limonciello <[email protected]>
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| 8 |
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| 9 |
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| 10 | #include <assert.h>
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| 11 | #include <errno.h>
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| 12 | #include <string.h>
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| 13 | #include <sys/ioctl.h>
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| 14 |
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| 15 |
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| 16 | #ifndef __packed
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| 17 | #define __packed __attribute__((packed))
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| 18 | #endif
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| 19 | #include <linux/psp-dbc.h>
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| 20 |
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| 21 | int get_nonce(int fd, void *nonce_out, void *signature)
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| 22 | {
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| 23 | struct dbc_user_nonce tmp = {
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| 24 | .auth_needed = !!signature,
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| 25 | };
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| 26 |
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| 27 | assert(nonce_out);
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| 28 |
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| 29 | if (signature)
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| 30 | memcpy(tmp.signature, signature, sizeof(tmp.signature));
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| 31 |
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| 32 | if (ioctl(fd, DBCIOCNONCE, &tmp))
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| 33 | return errno;
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| 34 | memcpy(nonce_out, tmp.nonce, sizeof(tmp.nonce));
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| 35 |
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| 36 | return 0;
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| 37 | }
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| 38 |
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| 39 | int set_uid(int fd, __u8 *uid, __u8 *signature)
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| 40 | {
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| 41 | struct dbc_user_setuid tmp;
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| 42 |
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| 43 | assert(uid);
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| 44 | assert(signature);
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| 45 |
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| 46 | memcpy(tmp.uid, uid, sizeof(tmp.uid));
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| 47 | memcpy(tmp.signature, signature, sizeof(tmp.signature));
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| 48 |
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| 49 | if (ioctl(fd, DBCIOCUID, &tmp))
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| 50 | return errno;
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| 51 | return 0;
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| 52 | }
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| 53 |
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| 54 | int process_param(int fd, int msg_index, __u8 *signature, int *data)
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| 55 | {
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| 56 | struct dbc_user_param tmp = {
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| 57 | .msg_index = msg_index,
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| 58 | .param = *data,
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| 59 | };
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| 60 |
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| 61 | assert(signature);
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| 62 | assert(data);
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| 63 |
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| 64 | memcpy(tmp.signature, signature, sizeof(tmp.signature));
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| 65 |
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| 66 | if (ioctl(fd, DBCIOCPARAM, &tmp))
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| 67 | return errno;
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| 68 |
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| 69 | *data = tmp.param;
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| 70 | memcpy(signature, tmp.signature, sizeof(tmp.signature));
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| 71 | return 0;
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| 72 | }
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