intel_pconfig.h (1545B)
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 7enum pconfig_target { 8 INVALID_TARGET = 0, 9 MKTME_TARGET = 1, 10 PCONFIG_TARGET_NR 11}; 12 13int pconfig_target_supported(enum pconfig_target target); 14 15enum 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). */ 42struct 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 50static 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(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 */