i.MX ProcessorsのトピックRe: To effect secure boot immediately, which boot sequence does it need?

To effect secure boot immediately, which boot sequence does it need?

takayuki_ishii — Mon, 25 Dec 2017 10:14:28 GMT

Hello community

In Document "i.MX_6_Linux_High_Assurance_Boot_(HAB)_Users_Guide_201405.pdf",

It have a sequence to put SEC_CONFIG to close in section 4 "Test Procedure".

After write eFuse by echo command,

In chapter 19, it say that "Boot the board again,",

Is this mean that to effect the chip security immediately, it must need a power on/off cycle?

Or it need only reset (POR_B Low cycle) to do that?

To reduce the eFuse write cycle time, customer plan to use "POR_B" cycle for it.

Best regards,

Ishii.

Re: To effect secure boot immediately, which boot sequence does it need?

igorpadykov — Mon, 25 Dec 2017 23:04:02 GMT

Hi Ishii

you are right, to effect the chip security immediately it is

sufficient only reset (POR_B Low cycle) to do that.

Best regards
igor
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Re: To effect secure boot immediately, which boot sequence does it need?

takayuki_ishii — Wed, 27 Dec 2017 00:17:52 GMT

Hello Igor,

Thank you for your quick response.

I will answer it to my customer.

Best regards,

Ishii.