From patchwork Fri May 15 19:53:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilias Apalodimas X-Patchwork-Id: 245864 List-Id: U-Boot discussion From: ilias.apalodimas at linaro.org (Ilias Apalodimas) Date: Fri, 15 May 2020 22:53:01 +0300 Subject: [PATCH 1/6 v3] efi_loader: Add headers for EDK2 StandAloneMM communication In-Reply-To: <20200515195306.522742-1-ilias.apalodimas@linaro.org> References: <20200515195306.522742-1-ilias.apalodimas@linaro.org> Message-ID: <20200515195306.522742-2-ilias.apalodimas@linaro.org> From: Sughosh Ganu In Arm devices OP-TEE has the ability to run StandAloneMM (from EDK2) in a separate partition and handle UEFI variables. A following patch introduces this functionality. Add the headers needed for OP-TEE <--> StandAloneMM communication Signed-off-by: Sughosh Ganu Signed-off-by: Ilias Apalodimas Reviewed-by: Heinrich Schuchardt --- include/mm_communication.h | 208 +++++++++++++++++++++++++++++++++++++ 1 file changed, 208 insertions(+) create mode 100644 include/mm_communication.h diff --git a/include/mm_communication.h b/include/mm_communication.h new file mode 100644 index 000000000000..193c4d157874 --- /dev/null +++ b/include/mm_communication.h @@ -0,0 +1,208 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Headers for EFI variable service via StandAloneMM, EDK2 application running + * in OP-TEE + * + * Copyright (c) 2017, Intel Corporation. All rights reserved. + * Copyright (C) 2020 Linaro Ltd. + * Copyright (C) 2020 Linaro Ltd. + */ + +#ifndef _MM_COMMUNICATION_H_ +#define _MM_COMMUNICATION_H_ + +#include + +/* + * Interface to the pseudo Trusted Application (TA), which provides a + * communication channel with the Standalone MM (Management Mode) + * Secure Partition running at Secure-EL0 + */ + +#define PTA_STMM_CMDID_COMMUNICATE 0 + +/* OP-TEE is using big endian GUIDs while UEFI uses little endian ones */ +#define PTA_STMM_UUID { 0xed32d533, 0x99e6, 0x4209, {\ + 0x9c, 0xc0, 0x2d, 0x72, 0xcd, 0xd9, 0x98, 0xa7 } } + +#define EFI_MM_VARIABLE_GUID \ + EFI_GUID(0xed32d533, 0x99e6, 0x4209, \ + 0x9c, 0xc0, 0x2d, 0x72, 0xcd, 0xd9, 0x98, 0xa7) + +/* Defined in EDK2 MdePkg/Include/Protocol/MmCommunication.h */ + +/** + * struct efi_mm_communicate_header - Header used for SMM variable communication + + * @header_guid: header use for disambiguation of content + * @message_len: length of the message. Does not include the size of the + * header + * @data: payload of the message + * + * Defined in EDK2 as EFI_MM_COMMUNICATE_HEADER. + * To avoid confusion in interpreting frames, the communication buffer should + * always begin with efi_mm_communicate_header. + */ +struct efi_mm_communicate_header { + efi_guid_t header_guid; + size_t message_len; + u8 data[]; +}; + +#define MM_COMMUNICATE_HEADER_SIZE \ + (sizeof(struct efi_mm_communicate_header)) + +/* Defined in EDK2 ArmPkg/Include/IndustryStandard/ArmStdSmc.h */ + +/* MM return error codes */ +#define ARM_SMC_MM_RET_SUCCESS 0 +#define ARM_SMC_MM_RET_NOT_SUPPORTED -1 +#define ARM_SMC_MM_RET_INVALID_PARAMS -2 +#define ARM_SMC_MM_RET_DENIED -3 +#define ARM_SMC_MM_RET_NO_MEMORY -4 + +/* Defined in EDK2 MdeModulePkg/Include/Guid/SmmVariableCommon.h */ + +#define SMM_VARIABLE_FUNCTION_GET_VARIABLE 1 +/* + * The payload for this function is + * SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME. + */ +#define SMM_VARIABLE_FUNCTION_GET_NEXT_VARIABLE_NAME 2 +/* + * The payload for this function is SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE. + */ +#define SMM_VARIABLE_FUNCTION_SET_VARIABLE 3 +/* + * The payload for this function is + * SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO. + */ +#define SMM_VARIABLE_FUNCTION_QUERY_VARIABLE_INFO 4 +/* + * It is a notify event, no extra payload for this function. + */ +#define SMM_VARIABLE_FUNCTION_READY_TO_BOOT 5 +/* + * It is a notify event, no extra payload for this function. + */ +#define SMM_VARIABLE_FUNCTION_EXIT_BOOT_SERVICE 6 +/* + * The payload for this function is VARIABLE_INFO_ENTRY. + * The GUID in EFI_SMM_COMMUNICATE_HEADER is gEfiSmmVariableProtocolGuid. + */ +#define SMM_VARIABLE_FUNCTION_GET_STATISTICS 7 +/* + * The payload for this function is SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE + */ +#define SMM_VARIABLE_FUNCTION_LOCK_VARIABLE 8 + +#define SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_SET 9 + +#define SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_GET 10 + +#define SMM_VARIABLE_FUNCTION_GET_PAYLOAD_SIZE 11 +/* + * The payload for this function is + * SMM_VARIABLE_COMMUNICATE_RUNTIME_VARIABLE_CACHE_CONTEXT + */ +#define SMM_VARIABLE_FUNCTION_INIT_RUNTIME_VARIABLE_CACHE_CONTEXT 12 + +#define SMM_VARIABLE_FUNCTION_SYNC_RUNTIME_CACHE 13 +/* + * The payload for this function is + * SMM_VARIABLE_COMMUNICATE_GET_RUNTIME_CACHE_INFO + */ +#define SMM_VARIABLE_FUNCTION_GET_RUNTIME_CACHE_INFO 14 + +/** + * struct smm_variable_communicate_header - Used for SMM variable communication + + * @function: function to call in Smm. + * @ret_status: return status + * @data: payload + * + * Defined in EDK2 as SMM_VARIABLE_COMMUNICATE_HEADER. + */ +struct smm_variable_communicate_header { + efi_uintn_t function; + efi_status_t ret_status; + u8 data[]; +}; + +#define MM_VARIABLE_COMMUNICATE_SIZE \ + (sizeof(struct smm_variable_communicate_header)) + +/** + * struct smm_variable_access - Used to communicate with StMM by + * SetVariable and GetVariable. + + * @guid: vendor GUID + * @data_size: size of EFI variable data + * @name_size: size of EFI name + * @attr: attributes + * @name: variable name + * + * Defined in EDK2 as SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE. + * + */ +struct smm_variable_access { + efi_guid_t guid; + efi_uintn_t data_size; + efi_uintn_t name_size; + u32 attr; + u16 name[]; +}; + +#define MM_VARIABLE_ACCESS_HEADER_SIZE \ + (sizeof(struct smm_variable_access)) +/** + * struct smm_variable_payload_size - Used to get the max allowed + * payload used in StMM. + * + * @size: size to fill in + * + * Defined in EDK2 as SMM_VARIABLE_COMMUNICATE_GET_PAYLOAD_SIZE. + * + */ +struct smm_variable_payload_size { + efi_uintn_t size; +}; + +/** + * struct smm_variable_getnext - Used to communicate with StMM for + * GetNextVariableName. + * + * @guid: vendor GUID + * @name_size: size of the name of the variable + * @name: variable name + * + * Defined in EDK2 as SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME. + */ +struct smm_variable_getnext { + efi_guid_t guid; + efi_uintn_t name_size; + u16 name[]; +}; + +#define MM_VARIABLE_GET_NEXT_HEADER_SIZE \ + (sizeof(struct smm_variable_getnext)) + +/** + * struct smm_variable_query_info - Used to communicate with StMM for + * QueryVariableInfo. + * + * @max_variable_storage: max available storage + * @remaining_variable_storage: remaining available storage + * @max_variable_size: max variable supported size + * @attr: attributes to query storage for + * + * Defined in EDK2 as SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO. + */ +struct smm_variable_query_info { + u64 max_variable_storage; + u64 remaining_variable_storage; + u64 max_variable_size; + u32 attr; +}; + +#endif /* _MM_COMMUNICATION_H_ */