From: "Abdul Lateef Attar via groups.io" <AbdulLateef.Attar=amd.com@groups.io>
To: <devel@edk2.groups.io>
Cc: Abdul Lateef Attar <AbdulLateef.Attar@amd.com>,
Michael D Kinney <michael.d.kinney@intel.com>,
Liming Gao <gaoliming@byosoft.com.cn>,
Zhiguang Liu <zhiguang.liu@intel.com>, Ray Ni <ray.ni@intel.com>,
"Rahul Kumar" <rahul1.kumar@intel.com>,
Gerd Hoffmann <kraxel@redhat.com>
Subject: [edk2-devel] [PATCH RESEND v2 1/2] MdePkg: Adds AMD Extended CPU topology CPUID
Date: Thu, 18 Jan 2024 09:24:08 +0530 [thread overview]
Message-ID: <15199aaefbc497bb1ea7b20028c13ebedd8c488b.1705549445.git.AbdulLateef.Attar@amd.com> (raw)
In-Reply-To: <cover.1705549445.git.AbdulLateef.Attar@amd.com>
From: Abdul Lateef Attar <AbdulLateef.Attar@amd.com>
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>
---
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
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next prev parent reply other threads:[~2024-01-18 3:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-18 3:54 [edk2-devel] [PATCH RESEND v2 0/2] AMD CPU extended topology Abdul Lateef Attar via groups.io
2024-01-18 3:54 ` Abdul Lateef Attar via groups.io [this message]
2024-01-18 22:59 ` [edk2-devel] [PATCH RESEND v2 1/2] MdePkg: Adds AMD Extended CPU topology CPUID Michael D Kinney
2024-01-18 3:54 ` [edk2-devel] [PATCH RESEND v2 2/2] UefiCpuPkg/BaseXApic[X2]ApicLib: Implements AMD extended cpu topology Abdul Lateef Attar via groups.io
2024-01-31 13:27 ` [edk2-devel] [PATCH RESEND v2 0/2] AMD CPU extended topology Laszlo Ersek
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