Re: [PATCH v5 1/9] arm64: dts: exynos: Add dts files for 64-bit Exynos5433 SoC

[Chanwoo Choi]

Hi,

On Fri, Mar 6, 2015 at 2:04 AM, Mark Rutland <mark.rutland@xxxxxxx> wrote:
> Hi,
>
> [...]
>
>> >> +       psci {
>> >> +               compatible = "arm,psci";
>> >> +               method = "smc";
>> >> +               cpu_off = <0x84000002>;
>> >> +               cpu_on = <0xC4000003>;
>> >> +       };
>> >
>> > Back at v2 you mentioned that CPU_OFF wasn't working [1].
>> >
>> > Do both CPU_ON and CPU_OFF work for all CPUs, including the boot CPU?
>>
>> The CPU1 ~ CPU7 are well woking about CPU_ON/OFF.
>> CPU0 (boot CPU) is only well working for CPU_OFF.
>> But when I try to turn on the CPU0 after CPU_OFF, I failed it.
>
> That's rather worrying. Can you look into what's going on here? I'd
> rather not have dts describing things which are known to be broken.

The board dts don't include any node for CPU_ON/OFF.
When I try to turn on the CPU0 (boot CPU), fail to turn on and lockup happen.
After lockup happen, I cannot use the console.

>
>> > I take it CPUs boot at EL2?
>
> Do the CPUs boot at EL1 or EL2?

Unfortunately, I cannot check the secure firmware for Exynos5433 SoC.
I think that a few SoC provider probably would know it.

[snip]

Thanks,
Chanwoo Choi
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