Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation

[Julien Grall]

Hi,

On 12/11/2014 10:44, Christoffer Dall wrote:
> > I'm not a fan of placing fundamentally required system description on
> > the command line. It's fine for explicit overrides but I don't think it
> > should be the default mechanism as that causes its own set of problems
> > (who wants to fight with their hypervisor to pass a command line to a
> > guest kernel?).
>
> Agreed completely, but I've been lacking strong technical arguments
> against passing this stuff on the cmdline.  My personal preferred
> approach for the Xen Dom0 case is to add a property to the DT.

IHMO, the cmdline is OS specific, therefore this solution wouldn't fit 
to support ACPI on other OS (i.e *BSD) without requiring specific 
implementation/parsing of the command line.

The DT solution would be cleaner and the bindings are already 
standardize (and starting to be used on other OS such as FreeBSD).

Regards,

--
Julien Grall