On 10/10/19 21:26, Eduardo Habkost wrote: > Topology info is already available on CPUID.
Independently of everything else, thanks for pointing this out. The edk2 library called "LocalApicLib" has two relevant functions: > /** > Get Package ID/Core ID/Thread ID of a processor. > > The algorithm assumes the target system has symmetry across physical > package boundaries with respect to the number of logical processors > per package, number of cores per package. > > @param[in] InitialApicId Initial APIC ID of the target logical processor. > @param[out] Package Returns the processor package ID. > @param[out] Core Returns the processor core ID. > @param[out] Thread Returns the processor thread ID. > **/ > VOID > EFIAPI > GetProcessorLocationByApicId ( > IN UINT32 InitialApicId, > OUT UINT32 *Package OPTIONAL, > OUT UINT32 *Core OPTIONAL, > OUT UINT32 *Thread OPTIONAL > ); > > /** > Get Package ID/Module ID/Tile ID/Die ID/Core ID/Thread ID of a processor. > > The algorithm assumes the target system has symmetry across physical > package boundaries with respect to the number of threads per core, number of > cores per module, number of modules per tile, number of tiles per die, > number > of dies per package. > > @param[in] InitialApicId Initial APIC ID of the target logical processor. > @param[out] Package Returns the processor package ID. > @param[out] Die Returns the processor die ID. > @param[out] Tile Returns the processor tile ID. > @param[out] Module Returns the processor module ID. > @param[out] Core Returns the processor core ID. > @param[out] Thread Returns the processor thread ID. > **/ > VOID > EFIAPI > GetProcessorLocation2ByApicId ( > IN UINT32 InitialApicId, > OUT UINT32 *Package OPTIONAL, > OUT UINT32 *Die OPTIONAL, > OUT UINT32 *Tile OPTIONAL, > OUT UINT32 *Module OPTIONAL, > OUT UINT32 *Core OPTIONAL, > OUT UINT32 *Thread OPTIONAL > ); They are implemented with heavy CPUID usage. So... just give me the APIC-ID. That's the primary key in edk2 for identifying x86 processors. Thanks Laszlo
