Messages in this thread | | | Date | Wed, 8 Mar 2006 15:54:04 -0800 | From | thockin@hockin ... | Subject | Re: proper way to assign fixed PCI resources to a "hotplug" device |
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On Thu, Mar 09, 2006 at 01:11:47AM +0300, Ivan Kokshaysky wrote: > On Wed, Mar 08, 2006 at 01:57:34PM -0800, thockin@hockin.org wrote: > > > Otherwise we have plenty of MMIO space. > > > > Not true. Plenty of root bridges have the same base/limit style > > configuration registers, but they are non-standard. Even worse - the MMIO > > hole thatthe chipset carves out, is not guaranteed to be big enough for > > some new random allocation. > > I'm intrigued. Care to give us an example of such system (where the > root bridge window is too small), please? lspci -vxxx?
I have systems where the BIOS sets up the IO hole to be the size of the BARs it finds at PCI enum time. If I have a device that has a hidden BAR, the hole won't cover it. Period.
> > Cleaning up and re-doing are not the same thing. The plethora of x86 > > chipsets makes this unpleasant at best and more likely unworkable. > > Yes, re-doing is a LOT simpler. ;-) > If needed, we could introduce 'pci=totallyingnorefsckingbiossettings' > boot option - it would be 10 or less lines of code.
Except for that whole chipset code thing. Have you dealt with the fugliness that is the chipset? You're really glossing over it. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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