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65 lines
1.5 KiB
65 lines
1.5 KiB
#ifndef _ASM_X86_INTEL_PCONFIG_H |
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#define _ASM_X86_INTEL_PCONFIG_H |
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#include <asm/asm.h> |
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#include <asm/processor.h> |
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enum pconfig_target { |
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INVALID_TARGET = 0, |
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MKTME_TARGET = 1, |
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PCONFIG_TARGET_NR |
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}; |
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int pconfig_target_supported(enum pconfig_target target); |
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enum pconfig_leaf { |
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MKTME_KEY_PROGRAM = 0, |
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PCONFIG_LEAF_INVALID, |
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}; |
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#define PCONFIG ".byte 0x0f, 0x01, 0xc5" |
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/* Defines and structure for MKTME_KEY_PROGRAM of PCONFIG instruction */ |
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/* mktme_key_program::keyid_ctrl COMMAND, bits [7:0] */ |
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#define MKTME_KEYID_SET_KEY_DIRECT 0 |
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#define MKTME_KEYID_SET_KEY_RANDOM 1 |
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#define MKTME_KEYID_CLEAR_KEY 2 |
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#define MKTME_KEYID_NO_ENCRYPT 3 |
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/* mktme_key_program::keyid_ctrl ENC_ALG, bits [23:8] */ |
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#define MKTME_AES_XTS_128 (1 << 8) |
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/* Return codes from the PCONFIG MKTME_KEY_PROGRAM */ |
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#define MKTME_PROG_SUCCESS 0 |
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#define MKTME_INVALID_PROG_CMD 1 |
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#define MKTME_ENTROPY_ERROR 2 |
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#define MKTME_INVALID_KEYID 3 |
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#define MKTME_INVALID_ENC_ALG 4 |
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#define MKTME_DEVICE_BUSY 5 |
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/* Hardware requires the structure to be 256 byte alinged. Otherwise #GP(0). */ |
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struct mktme_key_program { |
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u16 keyid; |
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u32 keyid_ctrl; |
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u8 __rsvd[58]; |
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u8 key_field_1[64]; |
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u8 key_field_2[64]; |
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} __packed __aligned(256); |
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static inline int mktme_key_program(struct mktme_key_program *key_program) |
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{ |
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unsigned long rax = MKTME_KEY_PROGRAM; |
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if (!pconfig_target_supported(MKTME_TARGET)) |
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return -ENXIO; |
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asm volatile(PCONFIG |
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: "=a" (rax), "=b" (key_program) |
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: "0" (rax), "1" (key_program) |
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: "memory", "cc"); |
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return rax; |
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} |
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#endif /* _ASM_X86_INTEL_PCONFIG_H */
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