On 26/01/16 14:25, Suzuki K. Poulose wrote:
> On 25/01/16 15:53, Marc Zyngier wrote:
>> Having both VHE and non-VHE capable CPUs in the same system
>> is likely to be a recipe for disaster.
>
>
>> diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
>> index b1adc51..bc7650a 100644
>> --- a/arch/arm64/kernel/smp.c
>> +++ b/arch/arm64/kernel/smp.c
>> @@ -113,6 +113,9 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
>> pr_crit("CPU%u: failed to come online\n", cpu);
>> ret = -EIO;
>> }
>> +
>> + if (is_kernel_mode_mismatched())
>> + panic("CPU%u: incompatible execution level", cpu);
>
>
> fyi,
>
> I have a series which tries to perform some checks for early CPU features,
> like this at [1] and adds support for early CPU boot failures, passing the error
> status back to the master. May be we could move this check there(once it settles),
> and fail the CPU boot with CPU_PANIC_KERNEL status.
>
>
> [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-January/401727.html
Definitely, there is room for consolidation in this area...
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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