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Commit b1472a60 authored by Thomas Gleixner's avatar Thomas Gleixner
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x86/smp: Don't send INIT to boot CPU



Parking CPUs in INIT works well, except for the crash case when the CPU
which invokes smp_park_other_cpus_in_init() is not the boot CPU. Sending
INIT to the boot CPU resets the whole machine.

Prevent this by validating that this runs on the boot CPU. If not fall back
and let CPUs hang in HLT.

Fixes: 45e34c8a ("x86/smp: Put CPUs into INIT on shutdown if possible")
Reported-by: default avatarBaokun Li <libaokun1@huawei.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarBaokun Li <libaokun1@huawei.com>
Link: https://lore.kernel.org/r/87ttui91jo.ffs@tglx
parent 45e34c8a
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