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On Thu, Apr 13, 2006 at 08:45:49PM +1000, Benjamin Herrenschmidt wrote: > On Thu, 2006-04-13 at 09:40 +0300, Muli Ben-Yehuda wrote: > > On Wed, Apr 12, 2006 at 09:52:33PM -0500, Olof Johansson wrote: > > > > > iommu=off can still be used for those who don't want to deal with the > > > overhead (and don't need it for any devices). > > > > I've been pondering walking the PCI bus before deciding to enable an > > IOMMU and checking each device's DMA mask. Is this something that you > > considered and rejected, or just something no one got around to doing? > > It would do the trick for airport cards in G5s.. a little bit of OF > walking to find the card. Walking the DT means we need to hardcode it on PCI IDs, since the Apple OF doesn't give the Airport device a logical name. It's probably easier to implement than walking PCI, but we'd need to maintain a table. My vote is for PCI walking, I'll give that a shot over the weekend. > It won't help with cardbus broadcom's but then, there is currently no G5 > with a cardbus adaptor that I know of :) It's possible I suppose to get > a pci<->cardbus adapter but I suppose in that case, we can ignore it ... Yep, that should be rare enough. -Olof - 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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