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| author |   Scott Murray <scott.murray@konsulko.com> | 2023-01-16 18:14:47 -0500 |
|---|---|---|
| committer |   Jan-Simon Moeller <jsmoeller@linuxfoundation.org> | 2023-01-29 14:29:37 +0000 |
| commit | ff102f398a1baf0522c359f356c31c3f935491dd (patch) | |
| tree | cdea279bd6d2d194ab01b53a32cb1d0dcb9d706b /recipes-support/rng-tools | |
| parent | 3b3008fc244b29a1022c93dd567db73990a8c505 (diff) | |
rng-tools: disable jitter entropy generation in VMs
Add a bbappend for rng-tools that disables jitter entropy generation
for virtio-all machines, as it provides little value in virtual
machines that are dependent on the host entropy anyways, and slows
their booting very significantly.
Bug-AGL: SPEC-4618
Change-Id: Ia61917253b69f37b003c617d4203c823dd51bb6c
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
(cherry picked from commit ebeba2f0667d7195597d9131a12d880d503a399a)
Diffstat (limited to 'recipes-support/rng-tools')
| -rw-r--r-- | recipes-support/rng-tools/files/default | 1 | ||||
| -rw-r--r-- | recipes-support/rng-tools/rng-tools_%.bbappend | 1 | ||||
| -rw-r--r-- | recipes-support/rng-tools/rng-tools_agldemo.inc | 7 |
3 files changed, 9 insertions, 0 deletions
diff --git a/recipes-support/rng-tools/files/default b/recipes-support/rng-tools/files/default new file mode 100644 index 000000000..6e2f2ca93 --- /dev/null +++ b/recipes-support/rng-tools/files/default @@ -0,0 +1 @@ +EXTRA_ARGS="-r /dev/hwrng -x jitter" diff --git a/recipes-support/rng-tools/rng-tools_%.bbappend b/recipes-support/rng-tools/rng-tools_%.bbappend new file mode 100644 index 000000000..8ec7f7507 --- /dev/null +++ b/recipes-support/rng-tools/rng-tools_%.bbappend @@ -0,0 +1 @@ +require ${@bb.utils.contains('AGL_FEATURES', 'agldemo', 'rng-tools_agldemo.inc', '', d)} diff --git a/recipes-support/rng-tools/rng-tools_agldemo.inc b/recipes-support/rng-tools/rng-tools_agldemo.inc new file mode 100644 index 000000000..283c8a4c4 --- /dev/null +++ b/recipes-support/rng-tools/rng-tools_agldemo.inc @@ -0,0 +1,7 @@ +# Pick up modified default configuration for virtual machines +# that disables jitter entropy source, as it is not useful when +# the VMs are effectively driven by the host RNG via virtio-rng. +# This also helps boot speed, as otherwise the guests have rngd +# potentially somewhat pointlessly burning a lot of CPU on boot, +# in addition to the host's own rngd. +FILESEXTRAPATHS:prepend:virtio-all := "${THISDIR}/files:" |