* Prarit Bhargava [off-list ref] wrote:

The ACPI SPCR code has been used to define an earlycon console for ARM64
and can be used for x86.

Modify the ACPI SPCR parsing code to account for console behaviour
differences between ARM64 and x86.  Initialize the SPCR code from
x86 ACPI initialization code.

Signed-off-by: Prarit Bhargava <redacted>
Cc: linux-doc at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-pm at vger.kernel.org
Cc: linux-acpi at vger.kernel.org
Cc: linux-serial at vger.kernel.org
Cc: Bhupesh Sharma <redacted>
Cc: Lv Zheng <redacted>
Cc: Thomas Gleixner <redacted>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86 at kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <redacted>
Cc: "Rafael J. Wysocki" <redacted>
Cc: Timur Tabi <redacted>
---
 Documentation/admin-guide/kernel-parameters.txt | 3 +++
 arch/arm64/kernel/acpi.c                        | 2 +-
 arch/x86/kernel/acpi/boot.c                     | 4 ++++
 drivers/acpi/Kconfig                            | 2 +-
 drivers/acpi/spcr.c                             | 7 +++++--
 include/linux/acpi.h                            | 7 +++++--
 6 files changed, 19 insertions(+), 6 deletions(-)

LGTM from an x86 perspective:

  Acked-by: Ingo Molnar [off-list ref]

(assuming it causes no regressions in linux-next.)

Since patch #1 affects ARM64 significantly, once that patch is acceptable to the 
arm64 folks feel free to upstream this second patch via the ARM64 tree as well.

Thanks,

	Ingo