chore(tc): add dummy entropy to speed up the Linux boot
If the kernel is post 5.19 and is configured with
CONFIG_RANDOM_TRUST_BOOTLOADER=y then entropy can be passed to
Linux via the device tree. This avoids delaying the Linux boot
waiting for entropy. This is particularly noticeable when
booting android but also speeds up the generation of the ssl
certificates.
Signed-off-by: Ben Horgan <ben.horgan@arm.com>
Change-Id: I4c6136c54f0e971802a2a9de9f88cd32b610dce9
diff --git a/fdts/tc.dts b/fdts/tc.dts
index 0c93bfa..bb1f5c7 100644
--- a/fdts/tc.dts
+++ b/fdts/tc.dts
@@ -26,6 +26,18 @@
chosen {
stdout-path = STDOUT_PATH;
+ /*
+ * Add some dummy entropy for Linux so it
+ * doesn't delay the boot waiting for it.
+ */
+ rng-seed = <0x01 0x02 0x04 0x05 0x06 0x07 0x08 \
+ 0x01 0x02 0x04 0x05 0x06 0x07 0x08 \
+ 0x01 0x02 0x04 0x05 0x06 0x07 0x08 \
+ 0x01 0x02 0x04 0x05 0x06 0x07 0x08 \
+ 0x01 0x02 0x04 0x05 0x06 0x07 0x08 \
+ 0x01 0x02 0x04 0x05 0x06 0x07 0x08 \
+ 0x01 0x02 0x04 0x05 0x06 0x07 0x08 \
+ 0x01 0x02 0x04 0x05 0x06 0x07 0x08 >;
};
cpus {