Add following APIs to communicate with OP-TEE pseudo/early TAs: 1. OpteeInit 2. OpteeOpenSession 3. OpteeCloseSession 4. OpteeInvokeFunc

Cc: Ard Biesheuvel ard.biesheuvel@linaro.org Cc: Leif Lindholm leif.lindholm@linaro.org Cc: Michael D Kinney michael.d.kinney@intel.com Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Sumit Garg sumit.garg@linaro.org --- ArmPkg/Library/OpteeLib/OpteeLib.inf | 2 + ArmPkg/Include/Library/OpteeLib.h | 88 +++++ ArmPkg/Library/OpteeLib/OpteeSmc.h | 43 +++ ArmPkg/Library/OpteeLib/Optee.c | 397 ++++++++++++++++++++ 4 files changed, 530 insertions(+)

diff --git a/ArmPkg/Library/OpteeLib/OpteeLib.inf b/ArmPkg/Library/OpteeLib/OpteeLib.inf index 5abd427379cc..e03054a7167d 100644 --- a/ArmPkg/Library/OpteeLib/OpteeLib.inf +++ b/ArmPkg/Library/OpteeLib/OpteeLib.inf @@ -23,11 +23,13 @@ [Defines]

[Sources] Optee.c + OpteeSmc.h

[Packages] ArmPkg/ArmPkg.dec MdePkg/MdePkg.dec

[LibraryClasses] + ArmMmuLib ArmSmcLib BaseLib diff --git a/ArmPkg/Include/Library/OpteeLib.h b/ArmPkg/Include/Library/OpteeLib.h index f65d8674d9b8..6884d5681831 100644 --- a/ArmPkg/Include/Library/OpteeLib.h +++ b/ArmPkg/Include/Library/OpteeLib.h @@ -25,10 +25,98 @@ #define OPTEE_OS_UID2 0xaf630002 #define OPTEE_OS_UID3 0xa5d5c51b

+#define OPTEE_MESSAGE_ATTRIBUTE_TYPE_NONE 0x0 +#define OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_INPUT 0x1 +#define OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_OUTPUT 0x2 +#define OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_INOUT 0x3 +#define OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_INPUT 0x9 +#define OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_OUTPUT 0xa +#define OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_INOUT 0xb + +#define OPTEE_MESSAGE_ATTRIBUTE_TYPE_MASK 0xff + +#define OPTEE_ORIGIN_COMMUNICATION 0x00000002 +#define OPTEE_ERROR_COMMUNICATION 0xFFFF000E + +typedef struct { + UINT64 BufferAddress; + UINT64 Size; + UINT64 SharedMemoryReference; +} OPTEE_MESSAGE_PARAM_MEMORY; + +typedef struct { + UINT64 A; + UINT64 B; + UINT64 C; +} OPTEE_MESSAGE_PARAM_VALUE; + +typedef struct { + UINT64 Attribute; + union { + OPTEE_MESSAGE_PARAM_MEMORY Memory; + OPTEE_MESSAGE_PARAM_VALUE Value; + } Union; +} OPTEE_MESSAGE_PARAM; + +#define OPTEE_MAX_CALL_PARAMS 4 + +typedef struct { + UINT32 Command; + UINT32 Function; + UINT32 Session; + UINT32 CancelId; + UINT32 Pad; + UINT32 Return; + UINT32 ReturnOrigin; + UINT32 NumParams; + + // NumParams tells the actual number of element in Params + OPTEE_MESSAGE_PARAM Params[OPTEE_MAX_CALL_PARAMS]; +} OPTEE_MESSAGE_ARG; + +typedef struct { + EFI_GUID Uuid; // [in] GUID/UUID of the Trusted Application + UINT32 Session; // [out] Session id + UINT32 Return; // [out] Return value + UINT32 ReturnOrigin; // [out] Origin of the return value +} OPTEE_OPEN_SESSION_ARG; + +typedef struct { + UINT32 Function; // [in] Trusted Application function, specific to the TA + UINT32 Session; // [in] Session id + UINT32 Return; // [out] Return value + UINT32 ReturnOrigin; // [out] Origin of the return value + OPTEE_MESSAGE_PARAM Params[OPTEE_MAX_CALL_PARAMS]; // Params for function to be invoked +} OPTEE_INVOKE_FUNCTION_ARG; + BOOLEAN EFIAPI IsOpteePresent ( VOID );

+EFI_STATUS +EFIAPI +OpteeInit ( + VOID + ); + +EFI_STATUS +EFIAPI +OpteeOpenSession ( + IN OUT OPTEE_OPEN_SESSION_ARG *OpenSessionArg + ); + +EFI_STATUS +EFIAPI +OpteeCloseSession ( + IN UINT32 Session + ); + +EFI_STATUS +EFIAPI +OpteeInvokeFunction ( + IN OUT OPTEE_INVOKE_FUNCTION_ARG *InvokeFunctionArg + ); + #endif diff --git a/ArmPkg/Library/OpteeLib/OpteeSmc.h b/ArmPkg/Library/OpteeLib/OpteeSmc.h new file mode 100644 index 000000000000..21ff4b22ab92 --- /dev/null +++ b/ArmPkg/Library/OpteeLib/OpteeSmc.h @@ -0,0 +1,43 @@ +/** @file + OP-TEE SMC header file. + + Copyright (c) 2018, Linaro Ltd. All rights reserved.<BR> + + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#ifndef _OPTEE_SMC_H_ +#define _OPTEE_SMC_H_ + +/* Returned in Arg0 only from Trusted OS functions */ +#define OPTEE_SMC_RETURN_OK 0x0 + +#define OPTEE_SMC_RETURN_FROM_RPC 0x32000003 +#define OPTEE_SMC_CALL_WITH_ARG 0x32000004 +#define OPTEE_SMC_GET_SHARED_MEMORY_CONFIG 0xb2000007 + +#define OPTEE_SMC_SHARED_MEMORY_CACHED 1 + +#define OPTEE_SMC_RETURN_RPC_FOREIGN_INTERRUPT 0xffff0004 + +#define OPTEE_MESSAGE_COMMAND_OPEN_SESSION 0 +#define OPTEE_MESSAGE_COMMAND_INVOKE_FUNCTION 1 +#define OPTEE_MESSAGE_COMMAND_CLOSE_SESSION 2 + +#define OPTEE_MESSAGE_ATTRIBUTE_META 0x100 + +#define OPTEE_LOGIN_PUBLIC 0x0 + +typedef struct { + UINTN Base; + UINTN Size; +} OPTEE_SHARED_MEMORY_INFORMATION; + +#endif diff --git a/ArmPkg/Library/OpteeLib/Optee.c b/ArmPkg/Library/OpteeLib/Optee.c index 574527f8b5ea..6617126e8bdb 100644 --- a/ArmPkg/Library/OpteeLib/Optee.c +++ b/ArmPkg/Library/OpteeLib/Optee.c @@ -14,11 +14,18 @@

**/

+#include <Library/ArmMmuLib.h> #include <Library/ArmSmcLib.h> +#include <Library/BaseMemoryLib.h> #include <Library/BaseLib.h> +#include <Library/DebugLib.h> #include <Library/OpteeLib.h>

#include <IndustryStandard/ArmStdSmc.h> +#include <OpteeSmc.h> +#include <Uefi.h> + +STATIC OPTEE_SHARED_MEMORY_INFORMATION OpteeSharedMemoryInformation = { 0 };

/** Check for OP-TEE presence. @@ -31,6 +38,7 @@ IsOpteePresent ( { ARM_SMC_ARGS ArmSmcArgs;

+ ZeroMem (&ArmSmcArgs, sizeof (ARM_SMC_ARGS)); // Send a Trusted OS Calls UID command ArmSmcArgs.Arg0 = ARM_SMC_ID_TOS_UID; ArmCallSmc (&ArmSmcArgs); @@ -44,3 +52,392 @@ IsOpteePresent ( return FALSE; } } + +STATIC +EFI_STATUS +OpteeSharedMemoryRemap ( + VOID + ) +{ + ARM_SMC_ARGS ArmSmcArgs; + EFI_PHYSICAL_ADDRESS PhysicalAddress; + EFI_PHYSICAL_ADDRESS Start; + EFI_PHYSICAL_ADDRESS End; + EFI_STATUS Status; + UINTN Size; + + ZeroMem (&ArmSmcArgs, sizeof (ARM_SMC_ARGS)); + ArmSmcArgs.Arg0 = OPTEE_SMC_GET_SHARED_MEMORY_CONFIG; + + ArmCallSmc (&ArmSmcArgs); + if (ArmSmcArgs.Arg0 != OPTEE_SMC_RETURN_OK) { + DEBUG ((DEBUG_WARN, "OP-TEE shared memory not supported\n")); + return EFI_UNSUPPORTED; + } + + if (ArmSmcArgs.Arg3 != OPTEE_SMC_SHARED_MEMORY_CACHED) { + DEBUG ((DEBUG_WARN, "OP-TEE: Only normal cached shared memory supported\n")); + return EFI_UNSUPPORTED; + } + + Start = (ArmSmcArgs.Arg1 + SIZE_4KB - 1) & ~(SIZE_4KB - 1); + End = (ArmSmcArgs.Arg1 + ArmSmcArgs.Arg2) & ~(SIZE_4KB - 1); + PhysicalAddress = Start; + Size = End - Start; + + if (Size < SIZE_4KB) { + DEBUG ((DEBUG_WARN, "OP-TEE shared memory too small\n")); + return EFI_BUFFER_TOO_SMALL; + } + + Status = ArmSetMemoryAttributes (PhysicalAddress, Size, EFI_MEMORY_WB); + if (EFI_ERROR (Status)) { + return Status; + } + + OpteeSharedMemoryInformation.Base = (UINTN)PhysicalAddress; + OpteeSharedMemoryInformation.Size = Size; + + return EFI_SUCCESS; +} + +EFI_STATUS +EFIAPI +OpteeInit ( + VOID + ) +{ + EFI_STATUS Status; + + if (!IsOpteePresent ()) { + DEBUG ((DEBUG_WARN, "OP-TEE not present\n")); + return EFI_UNSUPPORTED; + } + + Status = OpteeSharedMemoryRemap (); + if (EFI_ERROR (Status)) { + DEBUG ((DEBUG_WARN, "OP-TEE shared memory remap failed\n")); + return Status; + } + + return EFI_SUCCESS; +} + +/** + Does Standard SMC to OP-TEE in secure world. + + @param[in] PhysicalArg Physical address of message to pass to secure world + + @return 0 on success, secure world return code otherwise + +**/ +STATIC +UINT32 +OpteeCallWithArg ( + IN EFI_PHYSICAL_ADDRESS PhysicalArg + ) +{ + ARM_SMC_ARGS ArmSmcArgs; + + ZeroMem (&ArmSmcArgs, sizeof (ARM_SMC_ARGS)); + ArmSmcArgs.Arg0 = OPTEE_SMC_CALL_WITH_ARG; + ArmSmcArgs.Arg1 = (UINT32)(PhysicalArg >> 32); + ArmSmcArgs.Arg2 = (UINT32)PhysicalArg; + + while (TRUE) { + ArmCallSmc (&ArmSmcArgs); + + if (ArmSmcArgs.Arg0 == OPTEE_SMC_RETURN_RPC_FOREIGN_INTERRUPT) { + // + // A foreign interrupt was raised while secure world was + // executing, since they are handled in UEFI a dummy RPC is + // performed to let UEFI take the interrupt through the normal + // vector. + // + ArmSmcArgs.Arg0 = OPTEE_SMC_RETURN_FROM_RPC; + } else { + break; + } + } + + return ArmSmcArgs.Arg0; +} + +STATIC +VOID +UuidToOctets ( + OUT UINT8 *UuidOctet, + IN EFI_GUID *Uuid + ) +{ + UuidOctet[0] = Uuid->Data1 >> 24; + UuidOctet[1] = Uuid->Data1 >> 16; + UuidOctet[2] = Uuid->Data1 >> 8; + UuidOctet[3] = Uuid->Data1; + UuidOctet[4] = Uuid->Data2 >> 8; + UuidOctet[5] = Uuid->Data2; + UuidOctet[6] = Uuid->Data3 >> 8; + UuidOctet[7] = Uuid->Data3; + CopyMem (UuidOctet + 8, Uuid->Data4, sizeof (Uuid->Data4)); +} + +EFI_STATUS +EFIAPI +OpteeOpenSession ( + IN OUT OPTEE_OPEN_SESSION_ARG *OpenSessionArg + ) +{ + OPTEE_MESSAGE_ARG *MessageArg; + + MessageArg = NULL; + + if (OpteeSharedMemoryInformation.Base == 0) { + DEBUG ((DEBUG_WARN, "OP-TEE not initialized\n")); + return EFI_NOT_STARTED; + } + + MessageArg = (OPTEE_MESSAGE_ARG *)OpteeSharedMemoryInformation.Base; + ZeroMem (MessageArg, sizeof (OPTEE_MESSAGE_ARG)); + + MessageArg->Command = OPTEE_MESSAGE_COMMAND_OPEN_SESSION; + + // + // Initialize and add the meta parameters needed when opening a + // session. + // + MessageArg->Params[0].Attribute = OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_INPUT | + OPTEE_MESSAGE_ATTRIBUTE_META; + MessageArg->Params[1].Attribute = OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_INPUT | + OPTEE_MESSAGE_ATTRIBUTE_META; + UuidToOctets ( + (UINT8 *)&MessageArg->Params[0].Union.Value, + &OpenSessionArg->Uuid + ); + ZeroMem (&MessageArg->Params[1].Union.Value, sizeof (EFI_GUID)); + MessageArg->Params[1].Union.Value.C = OPTEE_LOGIN_PUBLIC; + + MessageArg->NumParams = 2; + + if (OpteeCallWithArg ((EFI_PHYSICAL_ADDRESS)MessageArg)) { + MessageArg->Return = OPTEE_ERROR_COMMUNICATION; + MessageArg->ReturnOrigin = OPTEE_ORIGIN_COMMUNICATION; + } + + OpenSessionArg->Session = MessageArg->Session; + OpenSessionArg->Return = MessageArg->Return; + OpenSessionArg->ReturnOrigin = MessageArg->ReturnOrigin; + + return EFI_SUCCESS; +} + +EFI_STATUS +EFIAPI +OpteeCloseSession ( + IN UINT32 Session + ) +{ + OPTEE_MESSAGE_ARG *MessageArg; + + MessageArg = NULL; + + if (OpteeSharedMemoryInformation.Base == 0) { + DEBUG ((DEBUG_WARN, "OP-TEE not initialized\n")); + return EFI_NOT_STARTED; + } + + MessageArg = (OPTEE_MESSAGE_ARG *)OpteeSharedMemoryInformation.Base; + ZeroMem (MessageArg, sizeof (OPTEE_MESSAGE_ARG)); + + MessageArg->Command = OPTEE_MESSAGE_COMMAND_CLOSE_SESSION; + MessageArg->Session = Session; + + OpteeCallWithArg ((EFI_PHYSICAL_ADDRESS)MessageArg); + + return EFI_SUCCESS; +} + +STATIC +EFI_STATUS +OpteeToMessageParam ( + OUT OPTEE_MESSAGE_PARAM *MessageParams, + IN UINT32 NumParams, + IN OPTEE_MESSAGE_PARAM *InParams + ) +{ + UINT32 Idx; + UINTN ParamSharedMemoryAddress; + UINTN SharedMemorySize; + UINTN Size; + + Size = (sizeof (OPTEE_MESSAGE_ARG) + sizeof (UINT64) - 1) & + ~(sizeof (UINT64) - 1); + ParamSharedMemoryAddress = OpteeSharedMemoryInformation.Base + Size; + SharedMemorySize = OpteeSharedMemoryInformation.Size - Size; + + for (Idx = 0; Idx < NumParams; Idx++) { + CONST OPTEE_MESSAGE_PARAM *InParam; + OPTEE_MESSAGE_PARAM *MessageParam; + UINT32 Attribute; + + InParam = InParams + Idx; + MessageParam = MessageParams + Idx; + Attribute = InParam->Attribute & OPTEE_MESSAGE_ATTRIBUTE_TYPE_MASK; + + switch (Attribute) { + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_NONE: + MessageParam->Attribute = OPTEE_MESSAGE_ATTRIBUTE_TYPE_NONE; + ZeroMem (&MessageParam->Union, sizeof (MessageParam->Union)); + break; + + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_INPUT: + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_OUTPUT: + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_INOUT: + MessageParam->Attribute = Attribute; + MessageParam->Union.Value.A = InParam->Union.Value.A; + MessageParam->Union.Value.B = InParam->Union.Value.B; + MessageParam->Union.Value.C = InParam->Union.Value.C; + break; + + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_INPUT: + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_OUTPUT: + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_INOUT: + MessageParam->Attribute = Attribute; + + if (InParam->Union.Memory.Size > SharedMemorySize) { + return EFI_OUT_OF_RESOURCES; + } + + CopyMem ( + (VOID *)ParamSharedMemoryAddress, + (VOID *)InParam->Union.Memory.BufferAddress, + InParam->Union.Memory.Size + ); + MessageParam->Union.Memory.BufferAddress = (UINT64)ParamSharedMemoryAddress; + MessageParam->Union.Memory.Size = InParam->Union.Memory.Size; + + Size = (InParam->Union.Memory.Size + sizeof (UINT64) - 1) & + ~(sizeof (UINT64) - 1); + ParamSharedMemoryAddress += Size; + SharedMemorySize -= Size; + break; + + default: + return EFI_INVALID_PARAMETER; + } + } + + return EFI_SUCCESS; +} + +STATIC +EFI_STATUS +OpteeFromMessageParam ( + OUT OPTEE_MESSAGE_PARAM *OutParams, + IN UINT32 NumParams, + IN OPTEE_MESSAGE_PARAM *MessageParams + ) +{ + UINT32 Idx; + + for (Idx = 0; Idx < NumParams; Idx++) { + OPTEE_MESSAGE_PARAM *OutParam; + CONST OPTEE_MESSAGE_PARAM *MessageParam; + UINT32 Attribute; + + OutParam = OutParams + Idx; + MessageParam = MessageParams + Idx; + Attribute = MessageParam->Attribute & OPTEE_MESSAGE_ATTRIBUTE_TYPE_MASK; + + switch (Attribute) { + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_NONE: + OutParam->Attribute = OPTEE_MESSAGE_ATTRIBUTE_TYPE_NONE; + ZeroMem (&OutParam->Union, sizeof (OutParam->Union)); + break; + + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_INPUT: + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_OUTPUT: + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_VALUE_INOUT: + OutParam->Attribute = Attribute; + OutParam->Union.Value.A = MessageParam->Union.Value.A; + OutParam->Union.Value.B = MessageParam->Union.Value.B; + OutParam->Union.Value.C = MessageParam->Union.Value.C; + break; + + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_INPUT: + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_OUTPUT: + case OPTEE_MESSAGE_ATTRIBUTE_TYPE_MEMORY_INOUT: + OutParam->Attribute = Attribute; + + if (MessageParam->Union.Memory.Size > OutParam->Union.Memory.Size) { + return EFI_BAD_BUFFER_SIZE; + } + + CopyMem ( + (VOID *)OutParam->Union.Memory.BufferAddress, + (VOID *)MessageParam->Union.Memory.BufferAddress, + MessageParam->Union.Memory.Size + ); + OutParam->Union.Memory.Size = MessageParam->Union.Memory.Size; + break; + + default: + return EFI_INVALID_PARAMETER; + } + } + + return EFI_SUCCESS; +} + +EFI_STATUS +EFIAPI +OpteeInvokeFunction ( + IN OUT OPTEE_INVOKE_FUNCTION_ARG *InvokeFunctionArg + ) +{ + EFI_STATUS Status; + OPTEE_MESSAGE_ARG *MessageArg; + + MessageArg = NULL; + + if (OpteeSharedMemoryInformation.Base == 0) { + DEBUG ((DEBUG_WARN, "OP-TEE not initialized\n")); + return EFI_NOT_STARTED; + } + + MessageArg = (OPTEE_MESSAGE_ARG *)OpteeSharedMemoryInformation.Base; + ZeroMem (MessageArg, sizeof (OPTEE_MESSAGE_ARG)); + + MessageArg->Command = OPTEE_MESSAGE_COMMAND_INVOKE_FUNCTION; + MessageArg->Function = InvokeFunctionArg->Function; + MessageArg->Session = InvokeFunctionArg->Session; + + Status = OpteeToMessageParam ( + MessageArg->Params, + OPTEE_MAX_CALL_PARAMS, + InvokeFunctionArg->Params + ); + if (Status) { + return Status; + } + + MessageArg->NumParams = OPTEE_MAX_CALL_PARAMS; + + if (OpteeCallWithArg ((EFI_PHYSICAL_ADDRESS)MessageArg)) { + MessageArg->Return = OPTEE_ERROR_COMMUNICATION; + MessageArg->ReturnOrigin = OPTEE_ORIGIN_COMMUNICATION; + } + + if (OpteeFromMessageParam ( + InvokeFunctionArg->Params, + OPTEE_MAX_CALL_PARAMS, + MessageArg->Params + )) { + MessageArg->Return = OPTEE_ERROR_COMMUNICATION; + MessageArg->ReturnOrigin = OPTEE_ORIGIN_COMMUNICATION; + } + + InvokeFunctionArg->Return = MessageArg->Return; + InvokeFunctionArg->ReturnOrigin = MessageArg->ReturnOrigin; + + return EFI_SUCCESS; +}