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.web09.35678.1607956966222066859 for ; Mon, 14 Dec 2020 06:42:46 -0800 Authentication-Results: mx.groups.io; dkim=missing; spf=softfail (domain: linaro.org, ip: 217.140.110.172, mailfrom: sughosh.ganu@linaro.org) 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 AF8B230E; Mon, 14 Dec 2020 06:42:45 -0800 (PST) Received: from a076522.blr.arm.com (a076522.blr.arm.com [10.162.16.44]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id AF9A03F66E; Mon, 14 Dec 2020 06:42:43 -0800 (PST) From: "Sughosh Ganu" To: devel@edk2.groups.io Cc: Sami Mujawar , Ard Biesheuvel , Leif Lindholm , Sahil Malhotra , Sughosh Ganu Subject: [PATCH v2 07/13] StandaloneMmPkg: Add option to use FF-A calls for getting SPM version Date: Mon, 14 Dec 2020 20:12:10 +0530 Message-Id: <20201214144216.26328-8-sughosh.ganu@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201214144216.26328-1-sughosh.ganu@linaro.org> References: <20201214144216.26328-1-sughosh.ganu@linaro.org> With the introduction of Firmware Framework(FF-A), a Secure Partition can get the SPM version either using FF-A calls or through the existing svc calls. Use a runtime check to use either of the two methods based on the Pcd feature flag value. Signed-off-by: Sughosh Ganu Co-developed-by: Achin Gupta --- StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/StandaloneMmCoreEntryPoint.inf | 3 ++ StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/AArch64/StandaloneMmCoreEntryPoint.c | 37 ++++++++++++++------ 2 files changed, 30 insertions(+), 10 deletions(-) diff --git a/StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/StandaloneMmCoreEntryPoint.inf b/StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/StandaloneMmCoreEntryPoint.inf index 7d6ee4e08e..f8184f501b 100644 --- a/StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/StandaloneMmCoreEntryPoint.inf +++ b/StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/StandaloneMmCoreEntryPoint.inf @@ -49,5 +49,8 @@ gEfiStandaloneMmNonSecureBufferGuid gEfiArmTfCpuDriverEpDescriptorGuid +[Pcd] + gArmTokenSpaceGuid.PcdFfaEnable + [BuildOptions] GCC:*_*_*_CC_FLAGS = -fpie diff --git a/StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/AArch64/StandaloneMmCoreEntryPoint.c b/StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/AArch64/StandaloneMmCoreEntryPoint.c index 093a4a4285..b390ea8371 100644 --- a/StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/AArch64/StandaloneMmCoreEntryPoint.c +++ b/StandaloneMmPkg/Library/StandaloneMmCoreEntryPoint/AArch64/StandaloneMmCoreEntryPoint.c @@ -23,6 +23,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include #include #include +#include #include #include @@ -31,6 +32,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #define SPM_MAJOR_VER_MASK 0xFFFF0000 #define SPM_MINOR_VER_MASK 0x0000FFFF #define SPM_MAJOR_VER_SHIFT 16 +#define FFA_NOT_SUPPORTED -1 CONST UINT32 mSpmMajorVer = SPM_MAJOR_VERSION; CONST UINT32 mSpmMinorVer = SPM_MINOR_VERSION; @@ -165,19 +167,34 @@ EFI_STATUS GetSpmVersion (VOID) { EFI_STATUS Status; - UINT16 SpmMajorVersion; - UINT16 SpmMinorVersion; + UINT16 CalleeSpmMajorVer; + UINT16 CallerSpmMajorVer; + UINT16 CalleeSpmMinorVer; + UINT16 CallerSpmMinorVer; UINT32 SpmVersion; ARM_SVC_ARGS SpmVersionArgs; - SpmVersionArgs.Arg0 = ARM_SVC_ID_SPM_VERSION_AARCH32; + if (FeaturePcdGet (PcdFfaEnable)) { + SpmVersionArgs.Arg0 = ARM_SVC_ID_FFA_VERSION_AARCH32; + SpmVersionArgs.Arg1 = mSpmMajorVerFfa << SPM_MAJOR_VER_SHIFT; + SpmVersionArgs.Arg1 |= mSpmMinorVerFfa; + CallerSpmMajorVer = mSpmMajorVerFfa; + CallerSpmMinorVer = mSpmMinorVerFfa; + } else { + SpmVersionArgs.Arg0 = ARM_SVC_ID_SPM_VERSION_AARCH32; + CallerSpmMajorVer = mSpmMajorVer; + CallerSpmMinorVer = mSpmMinorVer; + } ArmCallSvc (&SpmVersionArgs); SpmVersion = SpmVersionArgs.Arg0; + if (SpmVersion == FFA_NOT_SUPPORTED) { + return EFI_UNSUPPORTED; + } - SpmMajorVersion = ((SpmVersion & SPM_MAJOR_VER_MASK) >> SPM_MAJOR_VER_SHIFT); - SpmMinorVersion = ((SpmVersion & SPM_MINOR_VER_MASK) >> 0); + CalleeSpmMajorVer = ((SpmVersion & SPM_MAJOR_VER_MASK) >> SPM_MAJOR_VER_SHIFT); + CalleeSpmMinorVer = ((SpmVersion & SPM_MINOR_VER_MASK) >> 0); // Different major revision values indicate possibly incompatible functions. // For two revisions, A and B, for which the major revision values are @@ -186,17 +203,17 @@ GetSpmVersion (VOID) // revision A must work in a compatible way with revision B. // However, it is possible for revision B to have a higher // function count than revision A. - if ((SpmMajorVersion == mSpmMajorVer) && - (SpmMinorVersion >= mSpmMinorVer)) + if ((CalleeSpmMajorVer == CallerSpmMajorVer) && + (CalleeSpmMinorVer >= CallerSpmMinorVer)) { DEBUG ((DEBUG_INFO, "SPM Version: Major=0x%x, Minor=0x%x\n", - SpmMajorVersion, SpmMinorVersion)); + CalleeSpmMajorVer, CalleeSpmMinorVer)); Status = EFI_SUCCESS; } else { - DEBUG ((DEBUG_INFO, "Incompatible SPM Versions.\n Current Version: Major=0x%x, Minor=0x%x.\n Expected: Major=0x%x, Minor>=0x%x.\n", - SpmMajorVersion, SpmMinorVersion, mSpmMajorVer, mSpmMinorVer)); + DEBUG ((DEBUG_INFO, "Incompatible SPM Versions.\n Callee Version: Major=0x%x, Minor=0x%x.\n Caller: Major=0x%x, Minor>=0x%x.\n", + CalleeSpmMajorVer, CalleeSpmMinorVer, CallerSpmMajorVer, CallerSpmMinorVer)); Status = EFI_UNSUPPORTED; } -- 2.17.1