From: Abdul Lateef Attar <abdullateef.at...@amd.com> Adds cpuid macro for AMD extended CPU topology.
Cc: Michael D Kinney <michael.d.kin...@intel.com> Cc: Liming Gao <gaolim...@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang....@intel.com> Cc: Ray Ni <ray...@intel.com> Cc: Rahul Kumar <rahul1.ku...@intel.com> Cc: Gerd Hoffmann <kra...@redhat.com> Signed-off-by: Abdul Lateef Attar <abdullateef.at...@amd.com> --- MdePkg/Include/Register/Amd/Cpuid.h | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/MdePkg/Include/Register/Amd/Cpuid.h b/MdePkg/Include/Register/Amd/Cpuid.h index 44394fc7a4..add43c40aa 100644 --- a/MdePkg/Include/Register/Amd/Cpuid.h +++ b/MdePkg/Include/Register/Amd/Cpuid.h @@ -6,7 +6,7 @@ If a register returned is a single 32-bit value, then a data structure is not provided for that register. - Copyright (c) 2017, Advanced Micro Devices. All rights reserved.<BR> + Copyright (c) 2017 - 2024, Advanced Micro Devices. All rights reserved.<BR> SPDX-License-Identifier: BSD-2-Clause-Patent @@ -42,6 +42,27 @@ CPUID Signature Information /// @} /// +/** + CPUID Extended Topology Enumeration + + @note + Reference: AMD64 Architecture Programmer’s Manual Volume 3: General-Purpose and System Instructions, + Revision 3.35 Appendix E, + E.4.24 Function 8000_0026—Extended CPU Topology: + CPUID Fn8000_0026 reports extended topology information for logical processors, including + asymmetric and heterogenous topology descriptions. Individual logical processors may report + different values in systems with asynchronous and heterogeneous topologies. + The topology level is selected by the value passed to the instruction in ECX. To discover the topology + of a system, software should execute CPUID Fn8000_0026 with increasing ECX values, starting with + a value of zero, until the returned hierarchy level type (CPUID Fn8000_0026_ECX[LevelType]) is + equal to zero. It is not guaranteed that all topology level types are present in the system + + @param EAX AMD_CPUID_EXTENDED_TOPOLOGY (0x80000026) + @param ECX Level number + +**/ +#define AMD_CPUID_EXTENDED_TOPOLOGY 0x80000026 + /** CPUID Extended Processor Signature and Features -- 2.34.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#113981): https://edk2.groups.io/g/devel/message/113981 Mute This Topic: https://groups.io/mt/103802340/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
