On Fri, 14 Feb 2014, H. Peter Anvin wrote:
> On 02/14/2014 11:59 AM, Thomas Gleixner wrote:
> > On Fri, 14 Feb 2014, H. Peter Anvin wrote:
> >> On 02/14/2014 11:15 AM, Thomas Gleixner wrote:
> >>> I'm fine with ACPI tables if we can provide simple means for embedded
> >>> users to load one via grub or just attach it to the kernel image.
> >>
> >> That already exists, see Documentation/acpi/initrd_table_override.txt.
> >
> > That requires, that you have already ACPI tables.
> >
> > ACPI_SIG_RSDP cannot be overridden and that's the base table you need
> > to get ACPI going in the first place. So we need support for that and
> > probably for storing the tables at some non canonical place.
> >
>
> Well, the RSDP and RSDT/XSDT are nothing but pointers to other tables,
> so if explicitly overridden I'm not sure if one actually would need
> them. That doesn't mean our current code will work without them, though.
I tried once to overload all of the tables, but failed miserably in
the ACPI dungeon. RSDP was the major pain point IIRC.
Thanks,
tglx
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