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Diffstat (limited to 'main/rng-tools/rngd-extra.confd-arm')
| -rw-r--r-- | main/rng-tools/rngd-extra.confd-arm | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/main/rng-tools/rngd-extra.confd-arm b/main/rng-tools/rngd-extra.confd-arm new file mode 100644 index 00000000000..af6bf0c2f35 --- /dev/null +++ b/main/rng-tools/rngd-extra.confd-arm @@ -0,0 +1,112 @@ +# Configuration for /etc/init.d/rngd + +# Space-delimited list of entropy sources to enable. +# No need to include any source that is enabled by default. +# +# Choose from list: +# nist: NIST radio beacon. Not recommended. +# tpm: Is deprecated, will be removed in future version. +# +INCLUDE_ENTROPY_SOURCES="" + +# Space-delimited list of entropy sources to disable. +# Useful for disabling certain entropy sources even when supported on system. +# +EXCLUDE_ENTROPY_SOURCES="" + + +# Number of entropy bits to support, 1 <= n <= 8. +# +#ENTROPY_COUNT=8 + +# Time in seconds to periodically add fresh entropy to kernel entropy pool. +# +#FORCE_RESEED=300 + +# Device used for random number input. +# +#HWRNG_DEVICE="/dev/hwrng" + +# Kernel device used for random number output. +# +#RANDOM_DEVICE="/dev/random" + +# Number of bytes written to random-device at a time. +# +#STEP=64 + +# Do not stop feeding entropy to random device until at least this +# many bits of entropy are available in pool. Value can be +# 0 <= n <= `sysctl kernel.random.poolsize` but is usually 75% of pool size. +# +#WATERMARK=192 + + +# Entropy source specific options: +# +# +# darn options: +# use_aes:(BOOLEAN) +# +#DARN_OPTIONS="use_aes:1" +# +# +# jitter options: +# buffer_size:(INTEGER) +# force_soft_timer:(BOOLEAN) +# refill_thresh:(INTEGER) +# retry_count:(INTEGER) +# retry_delay:(INTEGER) +# thread_count:(INTEGER) +# use_aes:(BOOLEAN) +# +#JITTER_OPTIONS="buffer_size:16535 force_soft_timer:0 refill_thresh:16535" +#JITTER_OPTIONS="${JITTER_OPTIONS} retry_count:1 retry_delay:-1" +#JITTER_OPTIONS="${JITTER_OPTIONS} thread_count:4 timeout:5 use_aes:1" +# +# With the default jitter options Arm CPU-based devices typically experience +# continuous high CPU utilisation for several minutes after rngd starts. +# See https://gitlab.alpinelinux.org/alpine/aports/-/issues/13035 and +# https://github.com/nhorman/rng-tools/issues/150 +# In order to address this the following configuration changes have been made: +# +# - reduce the number of threads used to 1 in total, rather than 1 per core. +# - reduce the buffer size from 16535 to 4133 which reduces the time taken +# to fill the buffer (and so reduces the duration of CPU load). +# - increase the timeout from 5 to 20 seconds. +# +JITTER_OPTIONS="buffer_size:4133 refill_thresh:4133 thread_count:1 timeout:20" +# +# +# nist options: +# use_aes:(BOOLEAN) +# +#NIST_OPTIONS="use_aes:1" +# +# +# rdrand options: +# use_aes:(BOOLEAN) +# +#RDRAND_OPTIONS="use_aes:0" +# +# +# rndr options: +# use_aes:(BOOLEAN) +# +#RNDR_OPTIONS="use_aes:0" +# +# +# rtlsdr options: +# device_id:(INTEGER) +# freq_min:(INTEGER) +# freq_max:(INTEGER) +# sample_min:(INTEGER) +# sample_max:(INTEGER) +# +#RTLSDR_OPTIONS="device_id:0 freq_min:90000000 freq_max:110000000" +#RTLSDR_OPTIONS="${RTLSDR_OPTIONS} sample_min:1000000 sample_max:2800000" + + +# Any extra arguments for rngd +# +EXTRA_ARGS="-q" |