Hi Mark,

On 03/06/2015 09:18 PM, Chanwoo Choi wrote:

Hi,

On 03/06/2015 08:40 PM, Mark Rutland wrote:

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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.

I guess I asked the wrong question.

Do CPUs enter the kernel at EL2 or at EL1?

Could you give me a tip how to check the kernel at EL2 or EL1?

Hmm... I thought we logged this but it looks like we don't.

You could hack in a check of is_hyp_mode_available() and
is_hyp_mode_mismatched(). That will tell you if EL2/hyp is available,
and whether all CPUs enter at the same mode (mandatory per the boot
protocol).

OK, I'll try it.

I check the return value of is_hyp_mode_available() to catch whether EL1 or EL2. 

The is_hyp_mode_available() returns 'false' during kernel booting.
- __boot_cpu_mode[0]: 0xe11 (BOOT_CPU_MODE_EL1)
- __boot_cpu_mode[1]: 0x0

Best Regards,
Chanwoo Choi