1 | #ifndef _ASM_X86_INTEL_PCONFIG_H |
2 | #define _ASM_X86_INTEL_PCONFIG_H |
3 | |
4 | #include <asm/asm.h> |
5 | #include <asm/processor.h> |
6 | |
7 | enum pconfig_target { |
8 | INVALID_TARGET = 0, |
9 | MKTME_TARGET = 1, |
10 | PCONFIG_TARGET_NR |
11 | }; |
12 | |
13 | int pconfig_target_supported(enum pconfig_target target); |
14 | |
15 | enum pconfig_leaf { |
16 | MKTME_KEY_PROGRAM = 0, |
17 | PCONFIG_LEAF_INVALID, |
18 | }; |
19 | |
20 | #define PCONFIG ".byte 0x0f, 0x01, 0xc5" |
21 | |
22 | /* Defines and structure for MKTME_KEY_PROGRAM of PCONFIG instruction */ |
23 | |
24 | /* mktme_key_program::keyid_ctrl COMMAND, bits [7:0] */ |
25 | #define MKTME_KEYID_SET_KEY_DIRECT 0 |
26 | #define MKTME_KEYID_SET_KEY_RANDOM 1 |
27 | #define MKTME_KEYID_CLEAR_KEY 2 |
28 | #define MKTME_KEYID_NO_ENCRYPT 3 |
29 | |
30 | /* mktme_key_program::keyid_ctrl ENC_ALG, bits [23:8] */ |
31 | #define MKTME_AES_XTS_128 (1 << 8) |
32 | |
33 | /* Return codes from the PCONFIG MKTME_KEY_PROGRAM */ |
34 | #define MKTME_PROG_SUCCESS 0 |
35 | #define MKTME_INVALID_PROG_CMD 1 |
36 | #define MKTME_ENTROPY_ERROR 2 |
37 | #define MKTME_INVALID_KEYID 3 |
38 | #define MKTME_INVALID_ENC_ALG 4 |
39 | #define MKTME_DEVICE_BUSY 5 |
40 | |
41 | /* Hardware requires the structure to be 256 byte aligned. Otherwise #GP(0). */ |
42 | struct mktme_key_program { |
43 | u16 keyid; |
44 | u32 keyid_ctrl; |
45 | u8 __rsvd[58]; |
46 | u8 key_field_1[64]; |
47 | u8 key_field_2[64]; |
48 | } __packed __aligned(256); |
49 | |
50 | static inline int mktme_key_program(struct mktme_key_program *key_program) |
51 | { |
52 | unsigned long rax = MKTME_KEY_PROGRAM; |
53 | |
54 | if (!pconfig_target_supported(target: MKTME_TARGET)) |
55 | return -ENXIO; |
56 | |
57 | asm volatile(PCONFIG |
58 | : "=a" (rax), "=b" (key_program) |
59 | : "0" (rax), "1" (key_program) |
60 | : "memory" , "cc" ); |
61 | |
62 | return rax; |
63 | } |
64 | |
65 | #endif /* _ASM_X86_INTEL_PCONFIG_H */ |
66 | |