Messages in this thread Patch in this message | | | From | Steven Price <> | Subject | [RFC PATCH 02/14] arm64: rsi: Add RSI definitions | Date | Fri, 27 Jan 2023 11:27:46 +0000 |
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From: Suzuki K Poulose <suzuki.poulose@arm.com>
The RMM (Realm Management Monitor) provides functionality that can be accessed by a realm guest through SMC (Realm Services Interface) calls.
The SMC definitions are based on DEN0137[1] version A-bet0.
[1] https://developer.arm.com/documentation/den0137/latest
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arm64/include/asm/rsi_cmds.h | 57 +++++++++++++ arch/arm64/include/asm/rsi_smc.h | 130 ++++++++++++++++++++++++++++++ 2 files changed, 187 insertions(+) create mode 100644 arch/arm64/include/asm/rsi_cmds.h create mode 100644 arch/arm64/include/asm/rsi_smc.h
diff --git a/arch/arm64/include/asm/rsi_cmds.h b/arch/arm64/include/asm/rsi_cmds.h new file mode 100644 index 000000000000..a0b3c1bd786a --- /dev/null +++ b/arch/arm64/include/asm/rsi_cmds.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2023 ARM Ltd. + */ + +#ifndef __ASM_RSI_CMDS_H +#define __ASM_RSI_CMDS_H + +#include <linux/arm-smccc.h> + +#include <asm/rsi_smc.h> + +enum ripas { + RSI_RIPAS_EMPTY, + RSI_RIPAS_RAM, +}; + +static inline unsigned long rsi_get_version(void) +{ + struct arm_smccc_res res; + + arm_smccc_smc(SMC_RSI_ABI_VERSION, 0, 0, 0, 0, 0, 0, 0, &res); + + return res.a0; +} + +static inline unsigned long invoke_rsi_fn_smc(unsigned long function_id, + unsigned long arg0, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3) +{ + struct arm_smccc_res res; + + arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, 0, 0, 0, &res); + return res.a0; +} + +static inline void invoke_rsi_fn_smc_with_res(unsigned long function_id, + unsigned long arg0, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + struct arm_smccc_res *res) +{ + arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, 0, 0, 0, res); +} + +static inline unsigned long rsi_set_addr_range_state(phys_addr_t start, + phys_addr_t end, + enum ripas state) +{ + return invoke_rsi_fn_smc(SMC_RSI_IPA_STATE_SET, + start, (end - start), state, 0); +} + +#endif diff --git a/arch/arm64/include/asm/rsi_smc.h b/arch/arm64/include/asm/rsi_smc.h new file mode 100644 index 000000000000..bc0cdd83f164 --- /dev/null +++ b/arch/arm64/include/asm/rsi_smc.h @@ -0,0 +1,130 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2023 ARM Ltd. + */ + +#ifndef __SMC_RSI_H_ +#define __SMC_RSI_H_ + +/* + * This file describes the Realm Services Interface (RSI) Application Binary + * Interface (ABI) for SMC calls made from within the Realm to the RMM and + * serviced by the RMM. + */ + +#define SMC_RSI_CALL_BASE 0xC4000000 + +/* + * The major version number of the RSI implementation. Increase this whenever + * the binary format or semantics of the SMC calls change. + */ +#define RSI_ABI_VERSION_MAJOR 1 + +/* + * The minor version number of the RSI implementation. Increase this when + * a bug is fixed, or a feature is added without breaking binary compatibility. + */ +#define RSI_ABI_VERSION_MINOR 0 + +#define RSI_ABI_VERSION ((RSI_ABI_VERSION_MAJOR << 16) | \ + RSI_ABI_VERSION_MINOR) + +#define RSI_ABI_VERSION_GET_MAJOR(_version) ((_version) >> 16) +#define RSI_ABI_VERSION_GET_MINOR(_version) ((_version) & 0xFFFF) + +#define RSI_SUCCESS 0 +#define RSI_ERROR_INPUT 1 +#define RSI_ERROR_STATE 2 +#define RSI_INCOMPLETE 3 + +#define SMC_RSI_FID(_x) (SMC_RSI_CALL_BASE + (_x)) + +#define SMC_RSI_ABI_VERSION SMC_RSI_FID(0x190) + +/* + * arg1 == The IPA of token buffer + * arg2 == Challenge value, bytes: 0 - 7 + * arg3 == Challenge value, bytes: 7 - 15 + * arg4 == Challenge value, bytes: 16 - 23 + * arg5 == Challenge value, bytes: 24 - 31 + * arg6 == Challenge value, bytes: 32 - 39 + * arg7 == Challenge value, bytes: 40 - 47 + * arg8 == Challenge value, bytes: 48 - 55 + * arg9 == Challenge value, bytes: 56 - 63 + * ret0 == Status / error + */ +#define SMC_RSI_ATTESTATION_TOKEN_INIT SMC_RSI_FID(0x194) + +/* + * arg1 == The IPA of token buffer + * ret0 == Status / error + * ret1 == Size of completed token in bytes + */ +#define SMC_RSI_ATTESTATION_TOKEN_CONTINUE SMC_RSI_FID(0x195) + +/* + * arg1 == Index, which measurements slot to extend + * arg2 == Size of realm measurement in bytes, max 64 bytes + * arg3 == Measurement value, bytes: 0 - 7 + * arg4 == Measurement value, bytes: 7 - 15 + * arg5 == Measurement value, bytes: 16 - 23 + * arg6 == Measurement value, bytes: 24 - 31 + * arg7 == Measurement value, bytes: 32 - 39 + * arg8 == Measurement value, bytes: 40 - 47 + * arg9 == Measurement value, bytes: 48 - 55 + * arg10 == Measurement value, bytes: 56 - 63 + * ret0 == Status / error + */ +#define SMC_RSI_MEASUREMENT_EXTEND SMC_RSI_FID(0x193) + +/* + * arg1 == Index, which measurements slot to read + * ret0 == Status / error + * ret1 == Measurement value, bytes: 0 - 7 + * ret2 == Measurement value, bytes: 7 - 15 + * ret3 == Measurement value, bytes: 16 - 23 + * ret4 == Measurement value, bytes: 24 - 31 + * ret5 == Measurement value, bytes: 32 - 39 + * ret6 == Measurement value, bytes: 40 - 47 + * ret7 == Measurement value, bytes: 48 - 55 + * ret8 == Measurement value, bytes: 56 - 63 + */ +#define SMC_RSI_MEASUREMENT_READ SMC_RSI_FID(0x192) + +#ifndef __ASSEMBLY__ + +struct realm_config { + unsigned long ipa_bits; /* Width of IPA in bits */ +}; + +#endif /* __ASSEMBLY__ */ + +/* + * arg1 == struct realm_config addr + * ret0 == Status / error + */ +#define SMC_RSI_REALM_CONFIG SMC_RSI_FID(0x196) + +/* + * arg1 == IPA address of target region + * arg2 == size of target region in bytes + * arg3 == RIPAS value + * ret0 == Status / error + * ret1 == Top of modified IPA range + */ +#define SMC_RSI_IPA_STATE_SET SMC_RSI_FID(0x197) + +/* + * arg1 == IPA of target page + * ret0 == Status / error + * ret1 == RIPAS value + */ +#define SMC_RSI_IPA_STATE_GET SMC_RSI_FID(0x198) + +/* + * arg1 == IPA of host call structure + * ret0 == Status / error + */ +#define SMC_RSI_HOST_CALL SMC_RSI_FID(0x199) + +#endif /* __SMC_RSI_H_ */ -- 2.34.1
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