linux-kernel - Re: [PATCH v3 2/2] drivers: crypto: caam: i.MX8ULP donot have CAAM page0 access

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Date: Thu, 18 Apr 2024 14:53:47 +0000
From: Horia Geanta <horia.geanta@....com>
To: Pankaj Gupta <pankaj.gupta@....com>, Gaurav Jain <gaurav.jain@....com>,
	Varun Sethi <V.Sethi@....com>, "herbert@...dor.apana.org.au"
	<herbert@...dor.apana.org.au>, "davem@...emloft.net" <davem@...emloft.net>,
	Iuliana Prodan <iuliana.prodan@....com>, "linux-crypto@...r.kernel.org"
	<linux-crypto@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH v3 2/2] drivers: crypto: caam: i.MX8ULP donot have CAAM
 page0 access

On 4/16/2024 8:35 AM, Pankaj Gupta wrote:
> iMX8ULP have a secure-enclave hardware IP called EdgeLock Enclave(ELE),
> that control access to caam controller's register page, i.e., page0.
> 
> At all, if the ELE release access to CAAM controller's register page,
> it will release to secure-world only.
> 
> Clocks are turned on automatically for iMX8ULP. There exists the caam
> clock gating bit, but it is not advised to gate the clock at linux, as
> optee-os or any other entity might be using it.
> 
> Signed-off-by: Pankaj Gupta <pankaj.gupta@....com>
Reviewed-by: Horia Geantă <horia.geanta@....com>

Thanks,
Horia