[PATCH 0/2] ACPI: Improve SPCR handling and messaging on SPCR-less systems

[Li Chen]

Gentle ping incase of forgotten.

 ---- On Fri, 06 Jun 2025 15:27:43 +0800  Li Chen <me at linux.beauty> wrote --- 
 > From: Li Chen <chenl311 at chinatelecom.cn>
 > 
 > This small series improves the kernel behavior and output when the ACPI SPCR
 > table is not present or not supported.
 > 
 > Currently, even on systems that completely lack an SPCR table, the kernel prints:
 > "Use ACPI SPCR as default console: Yes"
 > 
 > Or if with acpi=nospcr:
 > "Use ACPI SPCR as default console: No"
 > 
 > This may mislead users into thinking an SPCR table exists
 > when in fact there is no such table at all. This series addresses this in two steps:
 > 
 > Patch 1 ensures that acpi_parse_spcr() returns -ENODEV if CONFIG_ACPI_SPCR_TABLE is disabled.
 > 
 > Patch 2 updates arm64 acpi_boot_table_init() to only print the SPCR console message
 > if acpi_parse_spcr() succeeds.
 > 
 > This results in cleaner and more accurate boot logs on ARM64.
 > 
 > Tested on both SPCR-enabled and SPCR-less qemu-system arm64 virt platform. [1]
 > 
 > [1]: https://patchew.org/QEMU/20250528105404.457729-1-me@linux.beauty/
 > 
 > Li Chen (2):
 >   ACPI: Return -ENODEV from acpi_parse_spcr() when SPCR support is
 >     disabled
 >   ACPI: Suppress misleading SPCR console message when SPCR table is
 >     absent
 > 
 >  arch/arm64/kernel/acpi.c | 9 ++++++---
 >  include/linux/acpi.h     | 2 +-
 >  2 files changed, 7 insertions(+), 4 deletions(-)
 > 
 > -- 
 > 2.49.0
 > 
 > 

Regards,
Li