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    SubjectRe: AW: AW: [PATCH] x86: HPET force enable for Soekris net6501
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    What I gather is that they want to add tables where there are none, and that the ACPI code doesn't play along because there is no RSDP nor any RSDT/XSDT.

    On February 17, 2014 8:28:05 AM PST, Thomas Renninger <trenn@suse.de> wrote:
    >On Friday, February 14, 2014 10:16:41 PM Thomas Gleixner wrote:
    >> 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.
    >
    >What exactly do you try to achieve?
    >I cannot imagine a use-case where RSDP and XSDT overriding would help
    >you.
    >
    >Have you tried the current mechanism to override tables?
    >What is missing and for what do you need it for?
    >
    >I need more context, maybe I can help then.
    >
    > Thomas

    --
    Sent from my Android phone with K-9 Mail. Please excuse my brevity.


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