Messages in this thread | | | Subject | RE: x86-64 with nvidia MCP51 chipset: kernel does not find HPET | Date | Tue, 31 Oct 2006 11:24:02 -0600 | From | "Langsdorf, Mark" <> |
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> > If the hardware is not providing the HPET description in ACPI, > > there's little you can do, and most vendors do not provide > > the HPET description. > > > > Do you know if there's an entry for HPET in the ACPI? > > I'm not exactly an ACPI expert, but I do not think there is > an entry for HPET in the ACPI, as the check in > arch/x86_64/kernel/io_apic.c fails: > > But, with some help from anonymous sources, I have been able > to find the HPET and make it work using a userspace driver > that pokes registers by mmap'ing /dev/mem. So we just need > a way to tell the kernel it's there. > Presumably this would require a PCI quirk. > > Is this likely to be worth the trouble?
It's not a general purpose solution, but if you can write up the quirk, Andi might be willing to white list the machine in question.
-Mark Langsdorf AMD, Inc.
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