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Per CPU cpuinfo is used to persist the logical package and die IDs. That's
really not the right place simply because cpuinfo is subject to be
reinitialized when a CPU goes through an offline/online cycle.
This works by chance today, but that's far from correct and neither obvious
nor documented.
Add a per cpu datastructure which persists those logical IDs, which allows
to cleanup the CPUID evaluation code.
This is a temporary workaround until the larger topology management is in
place, which makes all of this logical management mechanics obsolete.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230814085113.292947071@linutronix.de
90781f0c4c