Re: AMD X2 unsynced TSC fix?

thockin
2006-10-28T22:54:21Z

On Sat, Oct 28, 2006 at 09:57:39PM +0200, Vojtech Pavlik wrote:
> > > No we don't -- most BIOS still don't give us the HPET table
> > > even when it is there in hardware. In the future this will change sure
> > > but people will still run a lot of older motherboards.
> >
> > I have exactly such a system (see thread "x86-64 with nvidia MCP51
> > chipset: kernel does not find HPET"). Is there anything at all I can do
> > to make the kernel see the HPET? Can I try to guess the address? BIOS
> > upgrade?
>
> In most cases where the HPET is present but not reported, it's not
> configured. Usually, you need to write a chipset-specific register to
> configure the address.
>
> Finding the register, finding some free MMIO space, writing the address
> to the register and telling the address to the kernel is enough.

Do we want to establish a precedent for chipsets that we can find the HPET
and configure ourselves? Register them all as PCI quirks...