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@@ -1438,6 +1438,24 @@ config HOTPLUG_CPU
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automatically on SMP systems. )
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Say N if you want to disable CPU hotplug.
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+config HOTPLUG_RESTRICT_TO_BOOTUP_CPUS
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+ def_bool n
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+ prompt "Restrict CPU hotplugging to processors found during boot" if HOTPLUG_CPU
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+ ---help---
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+ Say no here to use the default, which allows as many CPUs as are marked
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+ "disabled" by ACPI or MPTABLES to be hotplugged after bootup.
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+
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+ Say yes if you do not want to allow CPUs to be added after booting, for
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+ example if you only need CPU hotplugging enabled for suspend/resume.
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+
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+ If CPU_HOTPLUG is enabled this value may be overridden at boot time
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+ with the "additional_cpus" kernel parameter.
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+
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+config HOTPLUG_ADDITIONAL_CPUS
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+ int
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+ default 0 if !HOTPLUG_CPU || HOTPLUG_RESTRICT_TO_BOOTUP_CPUS
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+ default -1
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+
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config COMPAT_VDSO
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def_bool y
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prompt "Compat VDSO support"
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