From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Date: Mon, 07 Feb 2005 16:51:46 +0000 Subject: Re: [PATCH 2.6.11-rc2 0/3] altix: AGP bridge support for tioca chip Message-Id: <200502070851.47002.jbarnes@engr.sgi.com> List-Id: References: <20050204213158.16671.87679.94380@attica.americas.sgi.com> In-Reply-To: <20050204213158.16671.87679.94380@attica.americas.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Monday, February 7, 2005 2:07 am, Christoph Hellwig wrote: > Wouldn't it be better to allow pluggable IOMMUs at the ia64 architecture > level, replacing the machvecs? > > zx1 already has a switch to use swiotl for devices with too small dma > masks (and altix would need that one aswell if it tried to support such > devices). Something like that might be nice as part of the bridge driver work that's being discussed on lkml. Machine vectors as they stand right now aren't a good fit since they're only initialized once for the platform at boot time, not on a per-chip basis. Jesse