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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,
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
Deprecations