[edk2-devel] [PATCH 1/5] UefiCpuPkg: Create MpHandOff to transfer info from PEI to DXE.
Gerd Hoffmann
kraxel at redhat.com
Tue Jun 20 14:08:49 UTC 2023
Hi,
> +typedef struct {
> + UINT32 ApicId;
> + UINT32 Health;
> + UINT64 StartupSignalAddress;
> + UINT64 StartupProcedureAddress;
> +} PROCESSOR_HAND_OFF;
> +
> +typedef struct {
> + //
> + // The ProcessorIndex indicates the range of processors. If it is set to 0, it signifies
> + // processors from 0 to CpuCount - 1. Multiple instances in the HOB list describe
> + // processors from ProcessorIndex to ProcessorIndex + CpuCount - 1.
> + //
> + UINT32 ProcessorIndex;
> + UINT32 CpuCount;
> + UINT32 WaitLoopExecutionMode;
> + UINT32 StartupSignalValue;
> + PROCESSOR_HAND_OFF Info[];
> +} MP_HAND_OFF;
This works for ~2700 processors, with larger numbers you hit the
hob size limit. Not a good idea IMHO, we already have systems
that big.
take care,
Gerd
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