On Sat, 2006-04-15 at 08:37 -0500, Jon Mason wrote: > On Sat, Apr 15, 2006 at 06:57:55AM +1000, Benjamin Herrenschmidt wrote: > > > > > What I had in mind is an interface that given a PCI bridge will tell > > > you what's the most restrictive DMA mask for a device on that bridge, > > > so that you'll know whether you need to enable the IOMMU for that > > > bridge. I'll even settle for a function that tells you what's the most > > > restrictive DMA mask in the system, period. There's nothing inherently > > > arch specific about this. > > > > > > (and as a side note, the IOMMU we are working on on x86-64 is Calgary, > > > which is actually roughly the same chipset used in some PPC > > > machines...) > > > > Not sure I ever heard about that... What chipsets ? > > The pSeries POWER4 based systems (Regatta) had Calgary, and the > RS/6000 POWER3 based systems (Condor) had Winnipeg (a precursor to > Calgary, with many of the same features). Ah ok, I'm not familiar with the IBM chipset names Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- References:
- [PATCH] [1/2] POWERPC: IOMMU support for honoring dma_mask
- From: Olof Johansson <[email protected]>
- [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB
- From: Olof Johansson <[email protected]>
- [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Olof Johansson <[email protected]>
- Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Muli Ben-Yehuda <[email protected]>
- Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Benjamin Herrenschmidt <[email protected]>
- Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Olof Johansson <[email protected]>
- Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Muli Ben-Yehuda <[email protected]>
- Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Benjamin Herrenschmidt <[email protected]>
- Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Muli Ben-Yehuda <[email protected]>
- Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Benjamin Herrenschmidt <[email protected]>
- Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- From: Jon Mason <[email protected]>
- [PATCH] [1/2] POWERPC: IOMMU support for honoring dma_mask
- Prev by Date: Re: [PATCH 00/05] robust per_cpu allocation for modules
- Next by Date: Re: [patch][rfc] quell interactive feeding frenzy
- Previous by thread: Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- Next by thread: Re: [PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2
- Index(es):
 |