Acked-by: Michael D Kinney <michael.d.kin...@intel.com> > -----Original Message----- > From: Abdul Lateef Attar <abdat...@amd.com> > Sent: Wednesday, January 17, 2024 7:54 PM > To: devel@edk2.groups.io > Cc: Abdul Lateef Attar <abdullateef.at...@amd.com>; Kinney, Michael D > <michael.d.kin...@intel.com>; Liming Gao <gaolim...@byosoft.com.cn>; > Liu, Zhiguang <zhiguang....@intel.com>; Ni, Ray <ray...@intel.com>; > Kumar, Rahul R <rahul.r.ku...@intel.com>; Gerd Hoffmann > <kra...@redhat.com> > Subject: [PATCH RESEND v2 1/2] MdePkg: Adds AMD Extended CPU topology > CPUID > > 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
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