CAAM Test in imx6ulevk

arunachalamrama — Sun, 22 Jan 2017 16:32:29 GMT

I am using imx6ulevk Yocto 4.1.15_2.0.0-ga.

How to verify CAAM is enabled?

I added imx-test to the image and could not find any test with caam name.

Please let me know which tests are available in imx-test for caam.

Regards,

Arun

Re: CAAM Test in imx6ulevk

Yuri — Mon, 23 Jan 2017 01:39:30 GMT

Hello,

Configuration of CAAM driver is controlled by the kernel configuration parameters under

Cryptographic API -> Hardware Crypto Devices.

To call crypto algorithms from user space, the following kernel configuration parameters need

be selected under Cryptographic API :

CRYPTO_USER_API_HASH

CRYPTO_USER_API_SKCIPHER

Please refer to Chapter 50 CAAM (Cryptographic Acceleration and Assurance Module) in "i.MX_Linux_Reference_Manual.pdf" for detailed description about the configuration parameters.

You can check the kernel boot log ; the following message is shown, if CAAM driver is loaded

successfully:

caam 2140000.caam: Instantiated RNG4 SH1

caam 2140000.caam: device ID = 0x0a16030000000000 (Era -524)

caam 2140000.caam: job rings = 3, qi = 0

caam algorithms registered in /proc/crypto

caam_jr 2141000.jr0: registering rng-caam

To check algorithms registered, please use /proc/crypto :

root@imx6ulevk:~# cat /proc/crypto

…

name : cbc(aes)

driver : cbc-aes-caam

module : kernel

priority : 3000

refcnt : 1

selftest : passed

internal : no

type : givcipher

async : yes

blocksize : 16

min keysize : 16

max keysize : 32

ivsize : 16

geniv : <built-in>

To check CAAM is working or not, you can run a simple test to do encryption operation,
using kernel crypto API, then check /proc/interrupts.

root@imx6ulevk:~# cat /proc/interrupts

...

236: 14 GPC 105 Level 2141000.jr0

237: 0 GPC 106 Level 2142000.jr1

238: 0 GPC 46 Level 2143000.jr2

Have a great day,
Yuri

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topic CAAM Test in imx6ulevk in i.MX Processors

CAAM Test in imx6ulevk

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