acpi, x86: Add SPCR table support
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- v2 Latest2 patches 9 repliesIn review
- v12 patches 12 repliesSuperseded
Patches in v2 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/2 | acpi, spcr: Make SPCR avialable to other architecturesDocumentation/ arch/ drivers/ +4 more | +184 | 8 replies | |
| 2/2 | acpi, x86: Use SPCR table for earlycon on x86Documentation/ arch/ arch/ +3 more | +19 | 1 reply |
Reviews trailers per patch
1 of 2 patches has a Reviewed-by or Acked-by.
| Patch | Ingo Molnar |
|---|---|
| 1/2 | |
| 2/2 | A-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH v2 0/2] acpi, x86: Add SPCR table support
The SPCR (Serial Port Console Redirection) Table provides information about the configuration of the serial port. This information can be used to configure the early console.
SPCR support was added for ARM64 and is made available across all arches in this patchset. The first patch adds a weak per-arch configuration function and moves the SPCR code into ACPI. The second patch adds support to x86.
The existing behaviour on ARM64 is maintained. If the SPCR exists the earlycon and console are automatically configured.
The existing default behaviour on x86 is also maintained. If no console or earlycon parameter is defined and the SPCR exists, the serial port is not configured. If the earlycon parameter is used both the early console and the console are configured using the data from the SPCR.
Additional testing (requested by Timur): On Gigabyte (no quirks), Qualcomm Amberwing systems to test Qualcomm quirks, HPE Mantis system to test xgene quirks. Tested several x86 systems with and without a SPCR to confirm no changes in default behaviour.
[v2]: See 1/2 for code changes.
Prarit Bhargava (2):
acpi, spcr: Make SPCR avialable to other architectures acpi, x86: Use SPCR table for earlycon on x86
Documentation/admin-guide/kernel-parameters.txt | 9 +- arch/arm64/kernel/acpi.c | 128 ++++++++++++++++- arch/x86/kernel/acpi/boot.c | 4 + drivers/acpi/Kconfig | 7 +- drivers/acpi/spcr.c | 180 ++++++------------------ drivers/tty/serial/earlycon.c | 15 +- include/linux/acpi.h | 14 +- include/linux/serial_core.h | 2 - 8 files changed, 198 insertions(+), 161 deletions(-)
Signature · 1 line
2.15.0.rc0.39.g2f0e14e64