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doc/relnotes/4.13: Add changes to log-level configurability 

Change-Id: Ia7ef57d20ea5099f344ccbf58d76597cb0e82c85
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47669
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Nico Huber 2020-11-17 15:55:22 +01:00 committed by Angel Pons
parent 2609eaaa8f
commit 900c3a32a3
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Documentation/releases/coreboot-4.13-relnotes.md
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@ -110,6 +110,18 @@ bridges.
Exceptional cases, that may still need early bus master enabling in the future, Exceptional cases, that may still need early bus master enabling in the future,
should get their own per-reason Kconfig option. Ideally before the next release. should get their own per-reason Kconfig option. Ideally before the next release.
### Early runtime configurability of the console log level
Traditionally, we didn't allow the log level of the `romstage` console
to be changed at runtime (e.g. via `get_option()`). It turned out that
the technical constraints for this (no global variables in `romstage`)
vanished long ago, though. The new behaviour is to query `get_option()`
now from the second stage that uses the console on. In other words, if
the `bootblock` already enables the console, the `romstage` log level
can be changed via `get_option()`. Keeping the log level of the first
console static ensures that we can see console output even if there's
a bug in the more involved code to query options.
### Add significant changes here ### Add significant changes here
Deprecations Deprecations