tree ce97df92c3bc126adadfb30bb962c0de61ab5190
parent b4be123b58ad452e04e1542d9d2a0c96d8e9df11
author Thomas Gleixner <tglx@linutronix.de> 1528239339 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1534347446 +0200

x86/cpu/topology: Provide detect_extended_topology_early()

commit 95f3d39ccf7aaea79d1ffdac1c887c2e100ec1b6 upstream.

To support force disabling of SMT it's required to know the number of
thread siblings early. detect_extended_topology() cannot be called before
the APIC driver is selected, so split out the part which initializes
smp_num_siblings.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>