From: York Sun <yorksun@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 2/3] crypto/fsl - change starting entropy delay value
Date: Tue, 4 Aug 2015 08:52:33 -0700 [thread overview]
Message-ID: <55C0DFC1.7080301@freescale.com> (raw)
In-Reply-To: <1430833715-18193-3-git-send-email-alexandru.porosanu@freescale.com>
On 05/05/2015 06:48 AM, Alex Porosanu wrote:
> The entropy delay (the length in system clocks of each
> entropy sample) for the RNG4 block of CAAM is dependent
> on the frequency of the SoC. By elaborate methods, it
> has been determined that a good starting value for all
> platforms integrating the CAAM IP is 3200. Using a
> higher value has additional benefit of speeding up
> the process of instantiating the RNG, since the entropy
> delay will be increased and instantiation of the RNG
> state handles will be reattempted by the driver. If the
> starting value is low, for certain platforms, this can
> lead to a quite lengthy process.
> This patch changes the starting value of the length of
> the entropy sample to 3200 system clocks.
> In addition to this change, the attempted entropy delay
> values are now printed on the console upon initialization
> of the RNG block.
>
> Signed-off-by: Alex Porosanu <alexandru.porosanu@freescale.com>
> ---
Applied to u-boot-fsl-qoriq master with minor change in subject. Thanks.
York
next prev parent reply other threads:[~2015-08-04 15:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-05 13:48 [U-Boot] [PATCH 0/3] CAAM RNG fixes Alex Porosanu
2015-05-05 13:48 ` [U-Boot] [PATCH 1/3] crypto/fsl - disable RNG oscillator maximum frequency check Alex Porosanu
[not found] ` <55AACF55.2030509@freescale.com>
2015-07-22 16:37 ` Ruchika Gupta
2015-08-04 15:51 ` York Sun
2015-05-05 13:48 ` [U-Boot] [PATCH 2/3] crypto/fsl - change starting entropy delay value Alex Porosanu
[not found] ` <55AACF57.8080105@freescale.com>
2015-07-22 16:37 ` Ruchika Gupta
2015-08-04 15:52 ` York Sun [this message]
2015-05-05 13:48 ` [U-Boot] [PATCH 3/3] crypto/fsl - enable raw data instead of von Neumann data Alex Porosanu
[not found] ` <55AACF69.8080904@freescale.com>
2015-07-22 16:37 ` Ruchika Gupta
2015-08-04 15:52 ` York Sun
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