to #25688970

commit 56855a99f3d0d1e9f1f4e24f5851f9bf14c83296 upstream

ACPI 6.3 adds a flag to indicate that child nodes are all
identical cores. This is useful to authoritatively determine
if a set of (possibly offline) cores are identical or not.

Since the flag doesn't give us a unique id we can generate
one and use it to create bitmaps of sibling nodes, or simply
in a loop to determine if a subset of cores are identical.
Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: NHanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: NSudeep Holla <sudeep.holla@arm.com>
Signed-off-by: NJeremy Linton <jeremy.linton@arm.com>
Signed-off-by: NWill Deacon <will@kernel.org>
Signed-off-by: Nluanshi <zhangliguang@linux.alibaba.com>
Acked-by: Nzou cao <zoucao@linux.alibaba.com>
Acked-by: NCaspar Zhang <caspar@linux.alibaba.com>