194 lines
5.2 KiB
C
194 lines
5.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2023 ARM Ltd.
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*/
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#ifndef __ASM_RSI_SMC_H_
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#define __ASM_RSI_SMC_H_
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#include <linux/arm-smccc.h>
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/*
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* This file describes the Realm Services Interface (RSI) Application Binary
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* Interface (ABI) for SMC calls made from within the Realm to the RMM and
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* serviced by the RMM.
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*/
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/*
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* The major version number of the RSI implementation. This is increased when
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* the binary format or semantics of the SMC calls change.
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*/
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#define RSI_ABI_VERSION_MAJOR UL(1)
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/*
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* The minor version number of the RSI implementation. This is increased when
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* a bug is fixed, or a feature is added without breaking binary compatibility.
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*/
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#define RSI_ABI_VERSION_MINOR UL(0)
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#define RSI_ABI_VERSION ((RSI_ABI_VERSION_MAJOR << 16) | \
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RSI_ABI_VERSION_MINOR)
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#define RSI_ABI_VERSION_GET_MAJOR(_version) ((_version) >> 16)
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#define RSI_ABI_VERSION_GET_MINOR(_version) ((_version) & 0xFFFF)
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#define RSI_SUCCESS UL(0)
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#define RSI_ERROR_INPUT UL(1)
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#define RSI_ERROR_STATE UL(2)
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#define RSI_INCOMPLETE UL(3)
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#define RSI_ERROR_UNKNOWN UL(4)
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#define SMC_RSI_FID(n) ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_64, \
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ARM_SMCCC_OWNER_STANDARD, \
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n)
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/*
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* Returns RSI version.
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*
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* arg1 == Requested interface revision
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* ret0 == Status / error
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* ret1 == Lower implemented interface revision
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* ret2 == Higher implemented interface revision
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*/
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#define SMC_RSI_ABI_VERSION SMC_RSI_FID(0x190)
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/*
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* Read feature register.
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*
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* arg1 == Feature register index
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* ret0 == Status / error
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* ret1 == Feature register value
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*/
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#define SMC_RSI_FEATURES SMC_RSI_FID(0x191)
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/*
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* Read measurement for the current Realm.
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*
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* arg1 == Index, which measurements slot to read
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* ret0 == Status / error
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* ret1 == Measurement value, bytes: 0 - 7
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* ret2 == Measurement value, bytes: 8 - 15
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* ret3 == Measurement value, bytes: 16 - 23
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* ret4 == Measurement value, bytes: 24 - 31
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* ret5 == Measurement value, bytes: 32 - 39
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* ret6 == Measurement value, bytes: 40 - 47
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* ret7 == Measurement value, bytes: 48 - 55
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* ret8 == Measurement value, bytes: 56 - 63
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*/
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#define SMC_RSI_MEASUREMENT_READ SMC_RSI_FID(0x192)
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/*
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* Extend Realm Extensible Measurement (REM) value.
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*
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* arg1 == Index, which measurements slot to extend
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* arg2 == Size of realm measurement in bytes, max 64 bytes
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* arg3 == Measurement value, bytes: 0 - 7
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* arg4 == Measurement value, bytes: 8 - 15
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* arg5 == Measurement value, bytes: 16 - 23
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* arg6 == Measurement value, bytes: 24 - 31
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* arg7 == Measurement value, bytes: 32 - 39
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* arg8 == Measurement value, bytes: 40 - 47
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* arg9 == Measurement value, bytes: 48 - 55
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* arg10 == Measurement value, bytes: 56 - 63
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* ret0 == Status / error
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*/
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#define SMC_RSI_MEASUREMENT_EXTEND SMC_RSI_FID(0x193)
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/*
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* Initialize the operation to retrieve an attestation token.
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*
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* arg1 == Challenge value, bytes: 0 - 7
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* arg2 == Challenge value, bytes: 8 - 15
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* arg3 == Challenge value, bytes: 16 - 23
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* arg4 == Challenge value, bytes: 24 - 31
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* arg5 == Challenge value, bytes: 32 - 39
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* arg6 == Challenge value, bytes: 40 - 47
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* arg7 == Challenge value, bytes: 48 - 55
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* arg8 == Challenge value, bytes: 56 - 63
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* ret0 == Status / error
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* ret1 == Upper bound of token size in bytes
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*/
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#define SMC_RSI_ATTESTATION_TOKEN_INIT SMC_RSI_FID(0x194)
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/*
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* Continue the operation to retrieve an attestation token.
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*
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* arg1 == The IPA of token buffer
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* arg2 == Offset within the granule of the token buffer
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* arg3 == Size of the granule buffer
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* ret0 == Status / error
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* ret1 == Length of token bytes copied to the granule buffer
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*/
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#define SMC_RSI_ATTESTATION_TOKEN_CONTINUE SMC_RSI_FID(0x195)
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#ifndef __ASSEMBLY__
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struct realm_config {
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union {
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struct {
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unsigned long ipa_bits; /* Width of IPA in bits */
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unsigned long hash_algo; /* Hash algorithm */
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};
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u8 pad[0x200];
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};
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union {
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u8 rpv[64]; /* Realm Personalization Value */
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u8 pad2[0xe00];
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};
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/*
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* The RMM requires the configuration structure to be aligned to a 4k
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* boundary, ensure this happens by aligning this structure.
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*/
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} __aligned(0x1000);
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#endif /* __ASSEMBLY__ */
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/*
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* Read configuration for the current Realm.
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*
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* arg1 == struct realm_config addr
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* ret0 == Status / error
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*/
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#define SMC_RSI_REALM_CONFIG SMC_RSI_FID(0x196)
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/*
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* Request RIPAS of a target IPA range to be changed to a specified value.
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*
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* arg1 == Base IPA address of target region
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* arg2 == Top of the region
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* arg3 == RIPAS value
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* arg4 == flags
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* ret0 == Status / error
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* ret1 == Top of modified IPA range
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* ret2 == Whether the Host accepted or rejected the request
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*/
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#define SMC_RSI_IPA_STATE_SET SMC_RSI_FID(0x197)
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#define RSI_NO_CHANGE_DESTROYED UL(0)
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#define RSI_CHANGE_DESTROYED UL(1)
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#define RSI_ACCEPT UL(0)
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#define RSI_REJECT UL(1)
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/*
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* Get RIPAS of a target IPA range.
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*
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* arg1 == Base IPA of target region
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* arg2 == End of target IPA region
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* ret0 == Status / error
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* ret1 == Top of IPA region which has the reported RIPAS value
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* ret2 == RIPAS value
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*/
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#define SMC_RSI_IPA_STATE_GET SMC_RSI_FID(0x198)
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/*
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* Make a Host call.
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*
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* arg1 == IPA of host call structure
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* ret0 == Status / error
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*/
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#define SMC_RSI_HOST_CALL SMC_RSI_FID(0x199)
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#endif /* __ASM_RSI_SMC_H_ */
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