Messages in this thread |  | | Subject | Re: AW: AW: [PATCH] x86: HPET force enable for Soekris net6501 | From | "H. Peter Anvin" <> | Date | Mon, 17 Feb 2014 09:19:03 -0800 |
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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
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