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arm64: smp: Treat unknown boot failures as being 'stuck in kernel' 

When we fail to bring a secondary CPU online and it fails in an unknown
state, we should assume the worst and increment 'cpus_stuck_in_kernel'
so that things like kexec() are disabled.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon 2019-08-27 15:54:56 +01:00
parent 5b1cfe3a0b
commit ebef746543
1 changed files with 1 additions and 0 deletions
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arch/arm64/kernel/smp.c
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@ -147,6 +147,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
default:
pr_err("CPU%u: failed in unknown state : 0x%lx\n",
cpu, status);
cpus_stuck_in_kernel++;
break;
case CPU_KILL_ME:
if (!op_cpu_kill(cpu)) {