[DistroKit] [PATCH] platform-v7a: add patch for omap hwrng

[DistroKit] [PATCH] platform-v7a: add patch for omap hwrng

[Rouven Czerwinski]

The kernel does not use the omap hwrng as an entropy source, since the
quality is not set. The getrandom system call is now used by OpenSSH,
which results in a long wait of 2 Minutes on first boot because of the
ed25519 key generation.
This patch sets the quality within the driver, allowing the beaglebone
black to boot fast again.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
---
 .../0001-hwrng-omap-Set-default-quality.patch | 35 +++++++++++++++++++
 configs/platform-v7a/patches/linux-5.0/series |  1 +
 2 files changed, 36 insertions(+)
 create mode 100644 configs/platform-v7a/patches/linux-5.0/0001-hwrng-omap-Set-default-quality.patch
 create mode 100644 configs/platform-v7a/patches/linux-5.0/series

diff --git a/configs/platform-v7a/patches/linux-5.0/0001-hwrng-omap-Set-default-quality.patch b/configs/platform-v7a/patches/linux-5.0/0001-hwrng-omap-Set-default-quality.patch
new file mode 100644
index 0000000..eb11fe8
--- /dev/null
+++ b/configs/platform-v7a/patches/linux-5.0/0001-hwrng-omap-Set-default-quality.patch
@@ -0,0 +1,35 @@
+From e99f217277bd40d0ecc6e1d506abfcd7b3a79ff7 Mon Sep 17 00:00:00 2001
+From: Rouven Czerwinski <r.czerwinski@pengutronix.de>
+Date: Mon, 11 Mar 2019 10:19:36 +0100
+Subject: [PATCH] hwrng: omap - Set default quality
+
+Newer combinations of the glibc, kernel and openssh can result in long initial
+startup times on OMAP devices:
+
+[    6.671425] systemd-rc-once[102]: Creating ED25519 key; this may take some time ...
+[  142.652491] systemd-rc-once[102]: Creating ED25519 key; done.
+
+due to the blocking getrandom(2) system call:
+
+[  142.610335] random: crng init done
+
+Set the quality level for the omap hwrng driver allowing the kernel to use the
+hwrng as an entropy source at boot.
+
+Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
+---
+ drivers/char/hw_random/omap-rng.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
+index b65ff6962899..e9b6ac61fb7f 100644
+--- a/drivers/char/hw_random/omap-rng.c
++++ b/drivers/char/hw_random/omap-rng.c
+@@ -443,6 +443,7 @@ static int omap_rng_probe(struct platform_device *pdev)
+ 	priv->rng.read = omap_rng_do_read;
+ 	priv->rng.init = omap_rng_init;
+ 	priv->rng.cleanup = omap_rng_cleanup;
++	priv->rng.quality = 900;
+ 
+ 	priv->rng.priv = (unsigned long)priv;
+ 	platform_set_drvdata(pdev, priv);
diff --git a/configs/platform-v7a/patches/linux-5.0/series b/configs/platform-v7a/patches/linux-5.0/series
new file mode 100644
index 0000000..16f6663
--- /dev/null
+++ b/configs/platform-v7a/patches/linux-5.0/series
@@ -0,0 +1 @@
+0001-hwrng-omap-Set-default-quality.patch
-- 
2.20.1


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Re: [DistroKit] [PATCH] platform-v7a: add patch for omap hwrng

[Robert Schwebel]

On Mon, Mar 11, 2019 at 12:07:04PM +0100, Rouven Czerwinski wrote:
> The kernel does not use the omap hwrng as an entropy source, since the
> quality is not set. The getrandom system call is now used by OpenSSH,
> which results in a long wait of 2 Minutes on first boot because of the
> ed25519 key generation.
> This patch sets the quality within the driver, allowing the beaglebone
> black to boot fast again.
> 
> Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
> ---
>  .../0001-hwrng-omap-Set-default-quality.patch | 35 +++++++++++++++++++
>  configs/platform-v7a/patches/linux-5.0/series |  1 +
>  2 files changed, 36 insertions(+)
>  create mode 100644 configs/platform-v7a/patches/linux-5.0/0001-hwrng-omap-Set-default-quality.patch
>  create mode 100644 configs/platform-v7a/patches/linux-5.0/series

Applied to next.

rsc
-- 
Pengutronix e.K.                           | Dipl.-Ing. Robert Schwebel  |
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