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authorNico Huber <nico.huber@secunet.com>2020-11-17 15:55:22 +0100
committerAngel Pons <th3fanbus@gmail.com>2020-11-19 16:22:23 +0000
commit900c3a32a3188b2753047492f6333c3c7c0268f3 (patch)
treeffbd188274dbd4edc76d4241d95af62d256c61fb /Documentation
parent2609eaaa8fc6c6d6b0285ee9be571164c5821270 (diff)
downloadcoreboot-900c3a32a3188b2753047492f6333c3c7c0268f3.tar.xz
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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-rw-r--r--Documentation/releases/coreboot-4.13-relnotes.md12
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diff --git a/Documentation/releases/coreboot-4.13-relnotes.md b/Documentation/releases/coreboot-4.13-relnotes.md
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+++ b/Documentation/releases/coreboot-4.13-relnotes.md
@@ -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