[Linaro-acpi] [PATCH v7 04/17] ARM64 / ACPI: Introduce early_param for "acpi" and pass acpi=force to enable ACPI

Timur Tabi timur at codeaurora.org
Wed Jan 28 09:58:54 PST 2015

On Wed, Jan 14, 2015 at 9:04 AM, Hanjun Guo <hanjun.guo at linaro.org> wrote:
> From: Al Stone <al.stone at linaro.org>
> Introduce one early parameters "off" and "force" for "acpi", acpi=off
> will be the default behavior for ARM64, so introduce acpi=force to
> enable ACPI on ARM64.
> Disable ACPI before early parameters parsed, and enable it to pass
> "acpi=force" if people want use ACPI on ARM64. This ensures DT be
> the prefer one if ACPI table and DT both are provided at this moment.

What is the reason to assume that DT is preferred over ACPI?  I would
have thought that if ACPI is present, then it means we're on an ARM64
server platform, and therefore it should be used.  It seems silly to
require acpi=force on every ARM64 server platform.

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