Re: [Linaro-acpi] [PATCH v7 04/17] ARM64 / ACPI: Introduce early_param for "acpi" and pass acpi=force to enable ACPI
From: Timur Tabi
Date: Wed Jan 28 2015 - 16:29:25 EST
On 01/28/2015 12:14 PM, Catalin Marinas wrote:
>So it looks like there's a whole conversation about this already in
>this thread that I didn't notice. However, reading through all of it,
>I still don't understand sure why the presence of ACPI tables is
>insufficient to enable ACPI.
Because ACPI on arm64 is still experimental, no matter how many people
claim that it is production ready in their private setups.
Fair enough. Does this mean that passing "acpi=force" on the kernel
command line is a requirement for ARM64 servers?
>In what situation would we want to ignore ACPI tables that are
>present?
When DT tables are also present (and for the first platforms, that's
highly recommended, though not easily enforceable at the kernel level).
My understanding is that the EFI stub creates a device tree (and it
contains some important information), so I don't understand how we can
ever have an ACPI-only platform on ARM64 servers.
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