Pierre:
Now, BaseRngLibTimerLib in MdePkg is used in many platforms. I think we
need to reserve enough time for the platform owner to update their DSC
files.
So, I suggest to keep current BaseRngLibTimerLib in MdePkg for
compatibility, and add new BaseRngLibTimerLib in MdeModulePkg for this
support. After some time, such as two stable tags, we can propose to remove
the one in MdePkg.
Thanks
Liming
> -----邮件原件-----
> 发件人: pierre.gondois@arm.com <pierre.gondois@arm.com>
> 发送时间: 2023年7月12日 21:30
> 收件人: devel@edk2.groups.io
> 抄送: Michael D Kinney <michael.d.kinney@intel.com>; Liming Gao
> <gaoliming@byosoft.com.cn>; Zhiguang Liu <zhiguang.liu@intel.com>; Jiewen
> Yao <jiewen.yao@intel.com>; Jian J Wang <jian.j.wang@intel.com>; Ard
> Biesheuvel <ardb+tianocore@kernel.org>; Sami Mujawar
> <sami.mujawar@arm.com>; Jose Marinho <Jose.Marinho@arm.com>; Kun
> Qin <kuqin12@gmail.com>; pierre.gondois@arm.com
> 主题: [PATCH v4 0/8] SecurityPkg/MdePkg: Update RngLib GUID identification
>
> From: Pierre Gondois <pierre.gondois@arm.com>
>
> v4:
> - New patches:
> - [1/8] MdePkg: Move BaseRngLibTimerLib to MdeModulePkg
> - [5/8] MdeModulePkg/Rng: Add GUID to describe unsafe Rng algorithms
> - This patch-set now requires to be accepted along an edk-platforms patch
> moving the BaseRngLibTimerLib to MdeModulePkg
>
> v3:
> - As the unsafe algorithm GUID will not be added to the UEFI
> specification, rename:
> - gEfiRngAlgorithmUnSafe to gEdkiiRngAlgorithmUnSafe
> - EFI_RNG_ALGORITHM_UNSAFE to EDKII_RNG_ALGORITHM_UNSAFE
>
> v2:
> [1/8] MdePkg/ArmTrngLib: Remove ASSERTs in Null implementation
> - Dropped
> [2/8] MdePkg/MdePkg.dec: Move PcdCpuRngSupportedAlgorithm to MdePkg
> - Change gEfiMdePkgTokenSpaceGuid.PcdCpuRngSupportedAlgorithm
> token number
> - Rename to SecurityPkg/SecurityPkg.dec: Move
> PcdCpuRngSupportedAlgorithm to MdePkg
> [5/8] MdePkg/Rng: Add GetRngGuid() to RngLib
> - Remove gEfiRngAlgorithmUnSafe from inf file
> - Split Guids definitions in arch specific sections
> [6/8] SecurityPkg/RngDxe: Use GetRngGuid() when probing RngLib
> - Remove RngFindDefaultAlgo() and change logic accordingly.
> [7/8] SecurityPkg/RngDxe: Select safe default Rng algorithm
> - Dropped due to changes in [6/8]
>
> This patch also requires the following patch on top of the serie:
> - https://edk2.groups.io/g/devel/message/106546
>
> This patchset follows the 'code first' approach and relates to [1].
> This patchset follows the thread at [3] that aims to solve [2].
> [1] and [2] are bound and this patchset aims to solve both.
>
> In this patchset:
> a-
> The RngDxe can rely on the RngLib. However the RngLib has no
> interface allowing to describe which Rng algorithm is implemented.
> The RngDxe must advertise the algorithm that are available through
> the RngGetInfo() callback.
> Add a GetRngGuid() for interface to the RngLib.
>
> b-
> The Arm Architecture states the RNDR that the DRBG algorithm should
> be compliant with NIST SP800-90A, while not mandating a particular
> algorithm, so as to be inclusive of different geographies.
> The RngLib can rely on this Arm RNDR instruction. In order to
> accurately describe the implementation using the RNDR instruction,
> add a EFI_RNG_ALGORITHM_ARM_RNDR GUID [1].
>
> c-
> For the same reason as a/b, add a GUID describing unsafe RNG
> algorithms, allowing to accurately describe the BaseRngLibTimerLib.
>
> d-
> Use a/b/c mechanisms/GUIDs to select a safe Rng algorithm in the
> Arm implementation of the RngDxe.
>
> [1] BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4441
> [2] BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4151
> [3] https://edk2.groups.io/g/devel/message/100806
>
> Pierre Gondois (8):
> MdePkg: Move BaseRngLibTimerLib to MdeModulePkg
> SecurityPkg/SecurityPkg.dec: Move PcdCpuRngSupportedAlgorithm to
> MdePkg
> MdePkg/DxeRngLib: Request raw algorithm instead of default
> MdePkg/Rng: Add GUID to describe Arm Rndr Rng algorithms
> MdeModulePkg/Rng: Add GUID to describe unsafe Rng algorithms
> MdePkg/Rng: Add GetRngGuid() to RngLib
> SecurityPkg/RngDxe: Use GetRngGuid() when probing RngLib
> SecurityPkg/RngDxe: Simplify Rng algorithm selection for Arm
>
> ArmVirtPkg/ArmVirt.dsc.inc | 2 +-
> EmulatorPkg/EmulatorPkg.dsc | 2 +-
> MdeModulePkg/Include/Guid/RngAlgorithm.h | 23 ++++++++
> .../BaseRngLibTimerLib/BaseRngLibTimerLib.inf | 4 ++
> .../BaseRngLibTimerLib/BaseRngLibTimerLib.uni | 0
> .../Library/BaseRngLibTimerLib/RngLibTimer.c | 28 ++++++++++
> MdeModulePkg/MdeModulePkg.dec | 3 +
> MdeModulePkg/MdeModulePkg.dsc | 1 +
> MdePkg/Include/Library/RngLib.h | 17 ++++++
> MdePkg/Include/Protocol/Rng.h | 10 ++++
> MdePkg/Library/BaseRngLib/AArch64/Rndr.c | 42 ++++++++++++++
> MdePkg/Library/BaseRngLib/BaseRngLib.inf | 10 ++++
> MdePkg/Library/BaseRngLib/Rand/RdRand.c | 26 +++++++++
> .../Library/BaseRngLibNull/BaseRngLibNull.c | 22 ++++++++
> MdePkg/Library/DxeRngLib/DxeRngLib.c | 36 +++++++++++-
> MdePkg/MdePkg.dec | 6 ++
> MdePkg/MdePkg.dsc | 1 -
> NetworkPkg/NetworkPkg.dsc | 4 +-
> OvmfPkg/AmdSev/AmdSevX64.dsc | 2 +-
> OvmfPkg/Bhyve/BhyveX64.dsc | 2 +-
> OvmfPkg/CloudHv/CloudHvX64.dsc | 2 +-
> OvmfPkg/IntelTdx/IntelTdxX64.dsc | 2 +-
> OvmfPkg/Microvm/MicrovmX64.dsc | 2 +-
> OvmfPkg/OvmfPkgIa32.dsc | 2 +-
> OvmfPkg/OvmfPkgIa32X64.dsc | 2 +-
> OvmfPkg/OvmfPkgX64.dsc | 2 +-
> OvmfPkg/OvmfXen.dsc | 2 +-
> OvmfPkg/RiscVVirt/RiscVVirt.dsc.inc | 2 +-
> .../RngDxe/AArch64/AArch64Algo.c | 55
> +++++++++++++------
> .../RandomNumberGenerator/RngDxe/ArmRngDxe.c | 23 +++-----
> .../RandomNumberGenerator/RngDxe/RngDxe.inf | 5 +-
> SecurityPkg/SecurityPkg.dec | 2 -
> SecurityPkg/SecurityPkg.dsc | 4 +-
> SignedCapsulePkg/SignedCapsulePkg.dsc | 4 +-
> 34 files changed, 294 insertions(+), 56 deletions(-)
> create mode 100644 MdeModulePkg/Include/Guid/RngAlgorithm.h
> rename {MdePkg =>
> MdeModulePkg}/Library/BaseRngLibTimerLib/BaseRngLibTimerLib.inf (91%)
> rename {MdePkg =>
> MdeModulePkg}/Library/BaseRngLibTimerLib/BaseRngLibTimerLib.uni
> (100%)
> rename {MdePkg =>
> MdeModulePkg}/Library/BaseRngLibTimerLib/RngLibTimer.c (83%)
>
> --
> 2.25.1
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