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MdePkg: Adds AMD Extended CPU topology CPUID 

Adds cpuid macro for AMD extended CPU topology.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Abdul Lateef Attar <AbdulLateef.Attar@amd.com>
Message-Id: <15199aaefbc497bb1ea7b20028c13ebedd8c488b.1705549445.git.AbdulLateef.Attar@amd.com>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
Acked-by: Ray Ni <ray.ni@intel.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
This commit is contained in:
Abdul Lateef Attar 2024-01-18 09:24:08 +05:30 committed by mergify[bot]
parent 40a45b5a2b
commit d14526372d
1 changed files with 22 additions and 1 deletions
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23
MdePkg/Include/Register/Amd/Cpuid.h
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@ -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