Re: [Tee-dev] [edk2][PATCH v5 1/1] ArmPkg/OpteeLib: Add APIs to communicate with OP-TEE

On Thu, 1 Nov 2018 at 17:13, Leif Lindholm leif.lindholm@linaro.org wrote:

Hi Sumit,

Actually, this module does not compile for ARM (32-bit).

/work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c: In function ‘OpteeOpenSession’: /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c:216:25: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] if (OpteeCallWithArg ((EFI_PHYSICAL_ADDRESS)MessageArg)) { ^ /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c: In function ‘OpteeCloseSession’: /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c:249:21: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] OpteeCallWithArg ((EFI_PHYSICAL_ADDRESS)MessageArg); ^ /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c: In function ‘OpteeToMessageParam’: /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c:307:9: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] (VOID *)InParam->Union.Memory.BufferAddress, ^ /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c: In function ‘OpteeFromMessageParam’: /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c:371:9: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] (VOID *)OutParam->Union.Memory.BufferAddress, ^ /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c:372:9: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] (VOID *)MessageParam->Union.Memory.BufferAddress, ^ /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c: In function ‘OpteeInvokeFunction’: /work/git/edk2/ArmPkg/Library/OpteeLib/Optee.c:420:25: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] if (OpteeCallWithArg ((EFI_PHYSICAL_ADDRESS)MessageArg)) { ^

---

Is it intended to be for 64-bit only? If so, can you pleace send a patch to move ArmPkg/Library/OpteeLib/OpteeLib.inf to the [Components.AARCH64] section of ArmPkg/ArmPkg.dsc.

If not, please rework the use of EFI_PHYSICAL_ADDRESS (always 64-bit) vs. pointers (depending on architecture).

Thanks Leif for reporting this. Optee library should work for ARM (32-bit) architecture too. Will try to fix compilation issue for ARM (32-bit) and send corresponding patch.

Regards, Sumit

Regards,

Leif

On Mon, Oct 22, 2018 at 11:59:36AM +0530, Sumit Garg wrote:

...

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 | 53 +++ ArmPkg/Library/OpteeLib/Optee.c | 392 ++++++++++++++++++++ 4 files changed, 535 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..9cccd81810c9 --- /dev/null +++ b/ArmPkg/Library/OpteeLib/OpteeSmc.h @@ -0,0 +1,53 @@ +/** @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;

+// +// UUID struct compliant with RFC4122 (network byte order). +// +typedef struct {

• UINT32 Data1;
• UINT16 Data2;
• UINT16 Data3;
• UINT8 Data4[8];

+} RFC4122_UUID;

+#endif diff --git a/ArmPkg/Library/OpteeLib/Optee.c b/ArmPkg/Library/OpteeLib/Optee.c index 574527f8b5ea..8ac31cb28266 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 +52,387 @@ 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 +EfiGuidToRfc4122Uuid (

• OUT RFC4122_UUID *Rfc4122Uuid,
• IN EFI_GUID *Guid
• )

+{

• Rfc4122Uuid->Data1 = SwapBytes32 (Guid->Data1);
• Rfc4122Uuid->Data2 = SwapBytes16 (Guid->Data2);
• Rfc4122Uuid->Data3 = SwapBytes16 (Guid->Data3);
• CopyMem (Rfc4122Uuid->Data4, Guid->Data4, sizeof (Rfc4122Uuid->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;
  

• EfiGuidToRfc4122Uuid (
• (RFC4122_UUID *)&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;

+}

2.7.4