From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Muli Ben-Yehuda <mulix@mulix.org>
Cc: Olof Johansson <olof@lixom.net>,
linuxppc-dev@ozlabs.org, paulus@samba.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
Date: Thu, 13 Apr 2006 20:45:49 +1000 [thread overview]
Message-ID: <1144925149.4935.14.camel@localhost.localdomain> (raw)
In-Reply-To: <20060413064027.GH10412@granada.merseine.nu>
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.
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 ...
Ben.
next prev parent reply other threads:[~2006-04-13 10:47 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-13 2:05 [PATCH] [1/2] POWERPC: IOMMU support for honoring dma_mask Olof Johansson
2006-04-13 2:28 ` [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB Olof Johansson
2006-04-13 2:52 ` [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2 Olof Johansson
2006-04-13 6:40 ` Muli Ben-Yehuda
2006-04-13 10:45 ` Benjamin Herrenschmidt [this message]
2006-04-13 16:07 ` Olof Johansson
2006-04-13 17:31 ` Muli Ben-Yehuda
2006-04-13 20:52 ` Benjamin Herrenschmidt
2006-04-14 14:48 ` Muli Ben-Yehuda
2006-04-14 20:57 ` Benjamin Herrenschmidt
2006-04-15 7:45 ` Muli Ben-Yehuda
2006-04-15 13:09 ` Jimi Xenidis
2006-04-15 13:37 ` Jon Mason
2006-04-15 20:28 ` Benjamin Herrenschmidt
2006-04-13 20:51 ` Benjamin Herrenschmidt
2006-04-13 22:27 ` Olof Johansson
2006-04-13 22:38 ` Benjamin Herrenschmidt
2006-04-13 15:57 ` Olof Johansson
2006-04-14 18:55 ` [PATCH] [1/2] POWERPC: IOMMU support for honoring dma_mask Olof Johansson
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