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contact devel+owner@edk2.groups.io Resent-Date: Fri, 12 Apr 2024 07:33:47 -0700 Resent-From: sami.mujawar@arm.com Reply-To: devel@edk2.groups.io,sami.mujawar@arm.com List-Unsubscribe-Post: List-Unsubscribe=One-Click List-Unsubscribe: X-Gm-Message-State: 2GhgRulsP0ppqJKrRVjaiiiVx7686176AA= Content-Type: text/plain X-GND-Status: LEGIT Authentication-Results: spool.mail.gandi.net; dkim=pass header.d=groups.io header.s=20240206 header.b=HHHYZBM0; spf=pass (spool.mail.gandi.net: domain of bounce@groups.io designates 45.79.227.220 as permitted sender) smtp.mailfrom=bounce@groups.io; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=arm.com (policy=none) Add helper function to check if the Realm Management Extension (RME) is implemented by the hardware. Cc: Ard Biesheuvel Cc: Leif Lindholm Signed-off-by: Sami Mujawar --- ArmPkg/Include/Chipset/AArch64.h | 3 ++- ArmPkg/Include/Library/ArmLib.h | 15 ++++++++++++++- ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c | 16 +++++++++++++++- 3 files changed, 31 insertions(+), 3 deletions(-) diff --git a/ArmPkg/Include/Chipset/AArch64.h b/ArmPkg/Include/Chipset/AArch64.h index 5390bf0a2774fb410f33e031cb0367708905c658..33f8df12637b7003b46458ae0680f67ebc3a431a 100644 --- a/ArmPkg/Include/Chipset/AArch64.h +++ b/ArmPkg/Include/Chipset/AArch64.h @@ -1,7 +1,7 @@ /** @file Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
- Copyright (c) 2011 - 2021, Arm Limited. All rights reserved.
+ Copyright (c) 2011 - 2023, Arm Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent @@ -30,6 +30,7 @@ // ID_AA64PFR0 - AArch64 Processor Feature Register 0 definitions #define AARCH64_PFR0_FP (0xF << 16) #define AARCH64_PFR0_GIC (0xF << 24) +#define AARCH64_PFR0_RME (0xFULL << 52) // ID_AA64DFR0 - AArch64 Debug Feature Register 0 definitions #define AARCH64_DFR0_TRACEVER (0xFULL << 4) diff --git a/ArmPkg/Include/Library/ArmLib.h b/ArmPkg/Include/Library/ArmLib.h index 6aa8a48f07f39255b70406774d2d803dbfc97b0b..ed876d231bbe82a1655e7455d04c92042aab3a94 100644 --- a/ArmPkg/Include/Library/ArmLib.h +++ b/ArmPkg/Include/Library/ArmLib.h @@ -1,7 +1,7 @@ /** @file Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
- Copyright (c) 2011 - 2016, ARM Ltd. All rights reserved.
+ Copyright (c) 2011 - 2023, Arm Limited. All rights reserved.
Copyright (c) 2020 - 2021, NUVIA Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent @@ -824,6 +824,19 @@ ArmHasSecurityExtensions ( VOID ); +#else + +/** Checks if RME is implemented. + + @retval TRUE RME is implemented. + @retval FALSE RME is not implemented. +**/ +BOOLEAN +EFIAPI +ArmHasRme ( + VOID + ); + #endif // MDE_CPU_ARM #endif // ARM_LIB_H_ diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c b/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c index 87285465871dc100ea0065659959ca845912c549..8952524fb3d56695cce181f852723d8b2a1dc77c 100644 --- a/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c +++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c @@ -1,7 +1,7 @@ /** @file Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
- Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.
+ Portions copyright (c) 2011 - 2023, Arm Limited. All rights reserved.
Copyright (c) 2021, NUVIA Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent @@ -150,3 +150,17 @@ ArmHasEte ( // The ID_AA64DFR0_EL1.TraceVer field identifies the presence of FEAT_ETE. return ((ArmReadIdAA64Dfr0 () & AARCH64_DFR0_TRACEVER) != 0); } + +/** Checks if RME is implemented. + + @retval TRUE RME is implemented. + @retval FALSE RME is not implemented. +**/ +BOOLEAN +EFIAPI +ArmHasRme ( + VOID + ) +{ + return ((ArmReadIdAA64Pfr0 () & AARCH64_PFR0_RME) != 0); +} -- 'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)' -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#117672): https://edk2.groups.io/g/devel/message/117672 Mute This Topic: https://groups.io/mt/105483410/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=-=-=-=-=-=-=-=-=-=-=-