From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mx.groups.io with SMTP id smtpd.web10.90.1588786074591933022 for ; Wed, 06 May 2020 10:27:54 -0700 Authentication-Results: mx.groups.io; dkim=missing; spf=pass (domain: arm.com, ip: 217.140.110.172, mailfrom: ard.biesheuvel@arm.com) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 32D7B101E; Wed, 6 May 2020 10:27:54 -0700 (PDT) Received: from e123331-lin.nice.arm.com (unknown [10.37.8.179]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C769C3F71F; Wed, 6 May 2020 10:27:51 -0700 (PDT) From: "Ard Biesheuvel" To: devel@edk2.groups.io Cc: Ard Biesheuvel , Michael D Kinney , Liming Gao , Jian J Wang , Hao A Wu , Leif Lindholm , Sami Mujawar , Jiewen Yao Subject: [PATCH resend 1/7] MdePkg: introduce MM communicate 2 protocol Date: Wed, 6 May 2020 19:27:28 +0200 Message-Id: <20200506172734.2475-2-ard.biesheuvel@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200506172734.2475-1-ard.biesheuvel@arm.com> References: <20200506172734.2475-1-ard.biesheuvel@arm.com> Add the protocol definition of the MM communicate 2 protocol, which has been introduced by version 1.7 errata A of the PI spec. Signed-off-by: Ard Biesheuvel --- MdePkg/Include/Protocol/MmCommunication2.h | 69 ++++++++++++++++++++ MdePkg/MdePkg.dec | 7 ++ 2 files changed, 76 insertions(+) diff --git a/MdePkg/Include/Protocol/MmCommunication2.h b/MdePkg/Include/Protocol/MmCommunication2.h new file mode 100644 index 000000000000..05f56dcae53e --- /dev/null +++ b/MdePkg/Include/Protocol/MmCommunication2.h @@ -0,0 +1,69 @@ +/** @file + EFI MM Communication Protocol 2 as defined in the PI 1.7 errata A specification. + + This protocol provides a means of communicating between drivers outside of MM and MMI + handlers inside of MM. + + Copyright (c) 2017, Intel Corporation. All rights reserved.
+ Copyright (c) 2020, Arm Limited. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef _MM_COMMUNICATION2_H_ +#define _MM_COMMUNICATION2_H_ + +#include + +#define EFI_MM_COMMUNICATION2_PROTOCOL_GUID \ + { \ + 0x378daedc, 0xf06b, 0x4446, { 0x83, 0x14, 0x40, 0xab, 0x93, 0x3c, 0x87, 0xa3 } \ + } + +typedef struct _EFI_MM_COMMUNICATION2_PROTOCOL EFI_MM_COMMUNICATION2_PROTOCOL; + +/** + Communicates with a registered handler. + + This function provides a service to send and receive messages from a registered UEFI service. + + @param[in] This The EFI_MM_COMMUNICATION_PROTOCOL instance. + @param[in] CommBufferPhysical Physical address of the MM communication buffer + @param[in] CommBufferVirtual Virtual address of the MM communication buffer + @param[in] CommSize The size of the data buffer being passed in. On exit, the size of data + being returned. Zero if the handler does not wish to reply with any data. + This parameter is optional and may be NULL. + + @retval EFI_SUCCESS The message was successfully posted. + @retval EFI_INVALID_PARAMETER CommBufferPhysical was NULL or CommBufferVirtual was NULL. + @retval EFI_BAD_BUFFER_SIZE The buffer is too large for the MM implementation. + If this error is returned, the MessageLength field + in the CommBuffer header or the integer pointed by + CommSize, are updated to reflect the maximum payload + size the implementation can accommodate. + @retval EFI_ACCESS_DENIED The CommunicateBuffer parameter or CommSize parameter, + if not omitted, are in address range that cannot be + accessed by the MM environment. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MM_COMMUNICATE2)( + IN CONST EFI_MM_COMMUNICATION2_PROTOCOL *This, + IN OUT VOID *CommBufferPhysical, + IN OUT VOID *CommBufferVirtual, + IN OUT UINTN *CommSize OPTIONAL + ); + +/// +/// EFI MM Communication Protocol provides runtime services for communicating +/// between DXE drivers and a registered MMI handler. +/// +struct _EFI_MM_COMMUNICATION2_PROTOCOL { + EFI_MM_COMMUNICATE2 Communicate; +}; + +extern EFI_GUID gEfiMmCommunication2ProtocolGuid; + +#endif + diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec index 6c37c2181c62..e2a79dd85db6 100644 --- a/MdePkg/MdePkg.dec +++ b/MdePkg/MdePkg.dec @@ -1277,6 +1277,13 @@ [Protocols] ## Include/Protocol/SpiSmmNorFlash.h gEfiSpiSmmNorFlashProtocolGuid = { 0xaab18f19, 0xfe14, 0x4666, { 0x86, 0x04, 0x87, 0xff, 0x6d, 0x66, 0x2c, 0x9a }} + # + # Protocols defined in PI 1.7. + # + + ## Include/Protocol/MmCommunication2.h + gEfiMmCommunication2ProtocolGuid = { 0x378daedc, 0xf06b, 0x4446, { 0x83, 0x14, 0x40, 0xab, 0x93, 0x3c, 0x87, 0xa3 }} + # # Protocols defined in UEFI2.1/UEFI2.0/EFI1.1 # -- 2.17.1