diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/include/asm/rsi_cmds.h | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/arch/arm64/include/asm/rsi_cmds.h b/arch/arm64/include/asm/rsi_cmds.h index 2c8763876dfb..c1fab41f671e 100644 --- a/arch/arm64/include/asm/rsi_cmds.h +++ b/arch/arm64/include/asm/rsi_cmds.h @@ -88,6 +88,14 @@ static inline long rsi_set_addr_range_state(phys_addr_t start, return res.a0; } +#define RSI_ATTEST_CHALLENGE_MIN_SIZE 32 +#define RSI_ATTEST_CHALLENGE_MAX_SIZE 64 + +struct rsi_attestation_token_init_args { + unsigned long fid; + u8 challenge[RSI_ATTEST_CHALLENGE_MAX_SIZE]; +}; + /** * rsi_attestation_token_init - Initialise the operation to retrieve an * attestation token. @@ -109,18 +117,21 @@ static inline long rsi_set_addr_range_state(phys_addr_t start, static inline long rsi_attestation_token_init(const u8 *challenge, unsigned long size) { - struct arm_smccc_1_2_regs regs = { 0 }; + union { + struct arm_smccc_1_2_regs regs; + struct rsi_attestation_token_init_args init; + } args = { 0 }; - /* The challenge must be at least 32bytes and at most 64bytes */ - if (!challenge || size < 32 || size > 64) + if (!challenge || size < RSI_ATTEST_CHALLENGE_MIN_SIZE || + size > RSI_ATTEST_CHALLENGE_MAX_SIZE) return -EINVAL; - regs.a0 = SMC_RSI_ATTESTATION_TOKEN_INIT; - memcpy(®s.a1, challenge, size); - arm_smccc_1_2_smc(®s, ®s); + args.init.fid = SMC_RSI_ATTESTATION_TOKEN_INIT; + memcpy(args.init.challenge, challenge, size); + arm_smccc_1_2_smc(&args.regs, &args.regs); - if (regs.a0 == RSI_SUCCESS) - return regs.a1; + if (args.regs.a0 == RSI_SUCCESS) + return args.regs.a1; return -EINVAL; } |