[PATCH] arm64: acpi: add acpi=on cmdline option to prefer ACPI boot over DT

[Catalin Marinas]

On Tue, Apr 12, 2016 at 04:09:11PM +0200, Ard Biesheuvel wrote:
> If both ACPI and DT platform descriptions are available, and the
> kernel was configured at build time to support both flavours, the
> default policy is to prefer DT over ACPI, and preferring ACPI over
> DT while still allowing DT as a fallback is not possible.
> 
> Since some enterprise features (such as RAS) depend on ACPI, it may
> be desirable for, e.g., distro installers to prefer ACPI boot but
> fall back to DT rather than failing completely if no ACPI tables are
> available.
> 
> So introduce the 'acpi=on' kernel command line parameter for arm64,
> which signifies that ACPI should be used if available, and DT should
> only be used as a fallback.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>

Acked-by: Catalin Marinas <catalin.marinas at arm.com>