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id 15.20.5612.022; Tue, 13 Sep 2022 06:22:46 +0000 From: "Nhi Pham via groups.io" To: devel@edk2.groups.io, quic_llindhol@quicinc.com, ardb+tianocore@kernel.org, sami.mujawar@arm.com, quic_rcran@quicinc.com Cc: patches@amperecomputing.com, Minh Nguyen , Nhi Pham , Rebecca Cran , Ard Biesheuvel Subject: [edk2-devel] [PATCH v3 2/6] ArmPkg: Correct return value of "SMCCC_ARCH_SOC_ID" Function ID call Date: Tue, 13 Sep 2022 13:19:43 +0700 Message-Id: <20220913061947.735951-3-nhi@os.amperecomputing.com> In-Reply-To: <20220913061947.735951-1-nhi@os.amperecomputing.com> References: <20220913061947.735951-1-nhi@os.amperecomputing.com> X-ClientProxiedBy: SG2PR06CA0194.apcprd06.prod.outlook.com (2603:1096:4:1::26) To PH0PR01MB7287.prod.exchangelabs.com (2603:10b6:510:10a::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH0PR01MB7287:EE_|DM6PR01MB3644:EE_ X-MS-Office365-Filtering-Correlation-Id: d4847abc-ec3c-4a65-ba1d-08da95505fa2 X-MS-Exchange-SenderADCheck: 1 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Reply-To: devel@edk2.groups.io,nhi@os.amperecomputing.com X-Gm-Message-State: fKsyBimhPcS2IAdUlFWUTZtFx1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1663050171; bh=sxHy+nIYAP8VOr0PFQhn7rFJ37qXcBWc2YMzVlJqvdg=; h=Cc:Content-Type:Date:From:Reply-To:Subject:To; b=lojNiBQ2YmGdow44BTDd4oOgqXHY8hwkwzs/7bv31Gc7jxvnW0ps8YZGQufkTl7KjAH 9iBudNm3RDa9kuBHOXKQmlChvj18mLTFuLODzpax79Kh9ldQUQEzTVocboJ0gT/t1/iPc RhcExKuWXQ5iNYsPWOvpiwnBGJK+qSQbN0s= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1663050172651100001 Content-Type: text/plain; charset="utf-8" From: Minh Nguyen According to "SMC Calling Convention" specification, section 7.4, return value of Arm Architecture Calls is stored at first argument of SMC aguments (ARM_SMC_ARGS). This value can be negative values indicating error or positive values (including zero) indicating success. Positive value would contain information of respective Function ID (Section 7.3.4 and 7.4.4). For that reason, "SMCCC_VERSION" and "SMCCC_ARCH_FEATURES" Function ID calls read return value from "SmcCallStatus" variable (Args.Arg0 - first argument of SMC call). But "SMCCC_ARCH_SOC_ID" Function ID call is reading return value from "SmcParam" variable (Args.Arg1 - second argument of SMC call) so it leads to unexpected results of "Jep106Code" and "SocRevision". This patch is to correct it. Signed-off-by: Nhi Pham Reviewed-by: Rebecca Cran Reviewed-by: Sami Mujawar Acked-by: Ard Biesheuvel --- ArmPkg/Universal/Smbios/ProcessorSubClassDxe/SmbiosProcessorArmCommon.c | = 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/ArmPkg/Universal/Smbios/ProcessorSubClassDxe/SmbiosProcessorAr= mCommon.c b/ArmPkg/Universal/Smbios/ProcessorSubClassDxe/SmbiosProcessorArm= Common.c index e0010a40e489..b961be213358 100644 --- a/ArmPkg/Universal/Smbios/ProcessorSubClassDxe/SmbiosProcessorArmCommon= .c +++ b/ArmPkg/Universal/Smbios/ProcessorSubClassDxe/SmbiosProcessorArmCommon= .c @@ -2,7 +2,7 @@ Functions for processor information common to ARM and AARCH64. =20 Copyright (c) 2021, NUVIA Inc. All rights reserved.
- Copyright (c) 2021, Ampere Computing LLC. All rights reserved.
+ Copyright (c) 2021 - 2022, Ampere Computing LLC. All rights reserved.
=20 SPDX-License-Identifier: BSD-2-Clause-Patent =20 @@ -131,7 +131,7 @@ SmbiosGetSmcArm64SocId ( SmcCallStatus =3D ArmCallSmc1 (SMCCC_ARCH_SOC_ID, &SmcParam, NULL, NULL); =20 if (SmcCallStatus >=3D 0) { - *Jep106Code =3D (INT32)SmcParam; + *Jep106Code =3D SmcCallStatus; } else { Status =3D EFI_UNSUPPORTED; } @@ -140,7 +140,7 @@ SmbiosGetSmcArm64SocId ( SmcCallStatus =3D ArmCallSmc1 (SMCCC_ARCH_SOC_ID, &SmcParam, NULL, NULL); =20 if (SmcCallStatus >=3D 0) { - *SocRevision =3D (INT32)SmcParam; + *SocRevision =3D SmcCallStatus; } else { Status =3D EFI_UNSUPPORTED; } --=20 2.25.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#93701): https://edk2.groups.io/g/devel/message/93701 Mute This Topic: https://groups.io/mt/93650286/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-